Exhaust Gas; E.g., Pollution Control, Etc. Patents (Class 110/345)
  • Patent number: 8807056
    Abstract: A system and method is provided for the removal of mercury from flue gas. Effective removal of mercury is obtained by oxidation of elemental mercury, with highly reactive halogen species derived from dissociation of halogen compounds at moderate temperatures brought into contact with the flue gas with or without the addition of carbon.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: August 19, 2014
    Assignee: Energy & Environmental Research Center Foundation
    Inventors: Michael J. Holmes, John H. Pavlish, Edwin S. Olson
  • Publication number: 20140216309
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for reducing or preventing the poisoning and/or contamination of an SCR catalyst. In another embodiment, the method and apparatus of the present invention is designed to protect the SCR catalyst. In still another embodiment, the present invention relates to a method and apparatus for increasing the service life and/or catalytic activity of an SCR catalyst while simultaneously controlling various emissions.
    Type: Application
    Filed: April 7, 2014
    Publication date: August 7, 2014
    Applicant: Babcock & Wilcox Power Generation Group, Inc.
    Inventors: Mandar R. GADGIL, S. Behrooz GHORISHI, Donald P. TONN
  • Patent number: 8795414
    Abstract: A process and system for feeding solids and carrier gases through the wall of a duct or chamber through which a gas stream flows to the flowing gas stream from a feed source exterior of the duct or chamber.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: August 5, 2014
    Assignee: Albemarle Corporation
    Inventor: Xin Liu
  • Patent number: 8795616
    Abstract: A system and method of using a double-effect-reactor to dispose incinerated flue gas and improve cement yields. The double-effect-reactor features an incinerated reaction chamber and a gas-solid suspension mixing chamber. The system includes the double-effect-reactor, a high temperature dust-arrester, a system for recovery of thermal energy and dust removal, a triple valve, and an independent chimney. Also disclosed is a method in which combines the double-effect-reactor with a cement production system.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: August 5, 2014
    Assignee: Satarem Technologies Limited
    Inventor: Ching Chiu Leung
  • Publication number: 20140208998
    Abstract: The invention relates to a process for advantageously efficiently treating a sulfureous combustible effluent stream by recovering the sulfur in elemental form. This process consists especially of the succession of two steps: a step of combustion of the sulfureous combustible effluent stream with an oxidant gas in excess, a step of post-combustion of the effluents from the combustion step with an acidic gas. The stream of the post-combustion effluents, free of chemical compounds that are harmful to the efficacy of the Claus catalysts, is treated in a Claus unit which performs the recovery of the sulfur in elemental form.
    Type: Application
    Filed: August 22, 2012
    Publication date: July 31, 2014
    Applicant: TOTAL SA
    Inventors: Jean Nougayrede, Soufene Maktouf
  • Publication number: 20140196639
    Abstract: The present invention relates generally to the generation of steam via the use of a combustion process to produce heat and, in one embodiment, to a device, system and/or method that enables one to control one or more process parameters of a combustion process so as to yield at least one desirable change in at least one downstream parameter. In one embodiment, the present invention is directed to a system and/or method for controlling at least one process parameter of a combustion process so as to yield at least one desirable change in at least one downstream process parameter associated with one or more of a wet flue gas desulfurization (WFGD) unit, a particulate collection device and/or control of additives thereto and/or a nitrogen oxide control device and/or control of additives thereto and/or additives to the system.
    Type: Application
    Filed: March 15, 2013
    Publication date: July 17, 2014
    Applicant: Babcock & Wilcox Power Generation Group, Inc.
    Inventors: Daniel B. Johnson, Shannon R. Brown
  • Publication number: 20140182296
    Abstract: The disclosure is concerned with generating power using new organic fuel that is generated at wastewater purification plants in the form of sewage sludge with moisture content up to 90-95%. The world supplies this new orgabic fuel in very high quantites that are estimated to be more than 25-40 gr of dry mass/man/day. The new composite fuel comprises a coal suspension with the new dispersed medium, which is the liquid sewage sludge. The composite fuel is introduced into a furnace for combustion and generating power.
    Type: Application
    Filed: May 30, 2007
    Publication date: July 3, 2014
    Inventor: Tomer Zimmels
  • Patent number: 8764438
    Abstract: In the method according to the invention for operating a cement plant, the raw meal is preheated in a preheating zone, the preheated material is precalcined in a calcining zone and the precalcined material is finally sintered in a sintering zone. The cement plant is operated in such a manner that the precalcined material which is supplied to the sintering zone has an SO3 concentration of at least 5.5% by mass and a CaSO4 proportion of at least 75%, preferably 90%, of the total salt content.
    Type: Grant
    Filed: July 28, 2009
    Date of Patent: July 1, 2014
    Inventors: Detlev Kupper, Dietmar Schulz
  • Patent number: 8763540
    Abstract: A method is provided for injecting a substance into a boiler of a waste incineration plant using a gaseous propellant, the substance being conducted, starting from at least one distributor, via lines which branch off from the distributor, in each case to a nozzle which is assigned to the respective line and by means of which the substance and the propellant are injected into the boiler. The substance quantity to be conducted to the respective nozzle is set in the distributor. The boiler is subdivided into multiple boiler sectors, in which the nozzles are arranged in a plurality of horizontal nozzle planes. To each boiler sector at least one separate distributor is assigned. The substance and the propellant are combined upstream of the branch-off with the respective line.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: July 1, 2014
    Assignee: Hitachi Zosen Inova AG
    Inventor: Roland Halter
  • Publication number: 20140158030
    Abstract: An oxyfiring system and method for capturing carbon dioxide in a combustion process is disclosed. The oxyfiring system comprises (a) an oxidation reactor for oxidizing a reduced metal oxide; (b) a decomposition reactor wherein oxidized metal oxide sorbents are reduced with oxygen being released and a flue gas with an oxygen enriched carbon dioxide stream is produced; (c) a fuel combustion reactor for combusting a primary fuel and the oxygen enriched carbon dioxide stream into a primary flue gas; and (d) separation apparatus for separating a portion of the primary flue gas so that a carbon dioxide enriched stream can be sent to the decomposition reactor. Steam may be added to assist in controlling the partial pressure of oxygen during decomposition of the metal oxide and a condenser may be used to remove water from the oxygen enriched flue gas.
    Type: Application
    Filed: December 7, 2012
    Publication date: June 12, 2014
    Applicant: Chevron U.S.A. Inc.
    Inventor: Raja Ankush Jadhav
  • Publication number: 20140150402
    Abstract: In one aspect, a combustion system is configured to facilitate preventing the formation of vanadium pentoxide (V2O5) and decrease a concentration of at least one of vanadium trioxide (V2O3) and vanadium tetroxide (V2O4) particles in an exhaust. The combustion system includes a vanadium-containing fuel supply and a combustor. The combustor is configured to generate a combustor exhaust gas including vanadium trioxide (V2O3) and/or vanadium tetroxide (V2O4) particles and to combust a reduced-oxygen mixture including the vanadium-containing fuel, ambient air, and a portion of the combustor exhaust gas. The combustion system also includes a particle separator configured to remove substantially all of the V2O3 and/or V2O4 particles from the combustor exhaust gas. A method for combusting fuel and a power generation system are also provided.
    Type: Application
    Filed: November 30, 2012
    Publication date: June 5, 2014
    Applicant: General Electric Company
    Inventors: Ahmed Mostafa ElKady, Sherif Hatem Abdulla Mohamed, Narendra Digamber Joshi, Hasan Karim, Gilbert Otto Kraemer, Samuel David Draper, Ashwin Raman
  • Publication number: 20140150699
    Abstract: A fossil-fuel-fired power plant, having a combustion device, a CO2 separation device, which is arranged downstream of the fossil-fuel-fired power plant, for removing CO2, and a CO2 compressor station, which is arranged downstream of the CO2 separation device and which has a number of compressor stages and coolers for intermediate cooling is provided. The coolers are connected to the CO2 separation device or the fossil-fuel-fired power plant by means of a condensate line in order to recover condensate. A method for carrying out the condensate recovery is also provided.
    Type: Application
    Filed: July 24, 2012
    Publication date: June 5, 2014
    Applicant: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Rudiger Schneider, Henning Schramm
  • Publication number: 20140144355
    Abstract: A method of and control apparatus for operation of a boiler plant are described. The boiler plant has a furnace volume, an oxyfuel firing system for oxyfuel combustion of fuel in the furnace volume, and a compression system for compression of gases exhausted from the furnace volume after combustion. The method and control apparatus are characterized by the step of controlling mass flow of gases through the compression system as a means to control pressure within the furnace volume. This invention relates to both single and multi unit arrangements.
    Type: Application
    Filed: December 9, 2011
    Publication date: May 29, 2014
    Applicants: POWER SYSTEMS SYNECTICS LIMITED, DOOSAN BABCOCK LIMITED
    Inventors: Konrad Jerzy Kuczynski, David James Adams
  • Publication number: 20140137780
    Abstract: An integrated fuel combustion system with adsorptive gas separation separates a portion of carbon dioxide from a combustion gas mixture and provides for recycle of separated carbon dioxide to the intake of the fuel combustor for combustion. A process for carbon dioxide separation and recycle includes: admitting combustion gas to an adsorptive gas separation system contactor containing adsorbent material; adsorbing a portion of carbon dioxide; recovering a first product gas depleted in carbon dioxide for release or use; desorbing carbon dioxide from the adsorbent material and recovering a desorbed second product gas enriched in carbon dioxide for sequestration or use; admitting a conditioning fluid into the contactor and desorbing a second portion of carbon dioxide to recover a carbon dioxide enriched conditioning stream; and recycling a portion of the carbon dioxide enriched conditioning stream to an inlet of fuel combustor to pass through the fuel combustor for combustion.
    Type: Application
    Filed: June 29, 2012
    Publication date: May 22, 2014
    Inventor: Andre Boulet
  • Publication number: 20140141380
    Abstract: Sorbent components containing halogen, calcium, alumina, and silica are used in combination during coal combustion to produce environmental benefits. Sorbents such as calcium bromide are added to the coal ahead of combustion and other components are added into the flame or downstream of the flame, preferably at minimum temperatures to assure complete formation of the refractory structures that result in various advantages of the methods. When used together, the components reduce emissions of elemental and oxidized mercury; increase the level of Hg, As, Pb, and/or Cl in the coal ash; decrease the levels of leachable heavy metals (such as Hg) in the ash, preferably to levels below the detectable limits; and make a highly cementitious ash product.
    Type: Application
    Filed: January 24, 2014
    Publication date: May 22, 2014
    Applicant: NOx II, Ltd.
    Inventor: Douglas C. Comrie
  • Publication number: 20140137779
    Abstract: Substantially pure high pressure steam is produced within a high pressure heat exchanger. Heat for the high pressure heat exchanger is provided from an outlet of an oxy-fuel combustion gas generator which discharges a steam/CO2 mixture at high pressure and temperature. The gas generator combusts oxygen and hydrocarbon fuel and mixes with water which can include contaminates therein in the form of dissolved solids or hydrocarbons. A separator is typically provided downstream of the gas generator and upstream of the heat exchanger and the steam/CO2 mixture is discharged from the gas generator at saturation temperature. A water fraction of the steam/CO2 mixture is discharged from the separator along with dissolved solids in concentrated brine form. The water heated into steam by the heat exchanger can be at least partially water separated within a condenser downstream of the heat exchanger.
    Type: Application
    Filed: October 8, 2013
    Publication date: May 22, 2014
    Applicant: Clean Energy Systems, Inc.
    Inventors: Keith L. Pronske, Roger A. Anderson, Bradley J. Anderson, Daniel A. Greisen
  • Patent number: 8728421
    Abstract: The present invention relates to environmental protection field. The present invention provided a method and a system thereof for treating flue gases generated from waste incinerator by using a dual-purpose reactor, wherein said dual-purpose reactor includes a connected incineration chamber and gas-solid suspension chamber. The method and the system of the invention can continuous operate under high temperature and remove acid gases and dioxin or dioxin precursor completely.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: May 20, 2014
    Assignee: Satarem Technologies Limited
    Inventor: Ching Chiu Leung
  • Patent number: 8721771
    Abstract: An exhaust gas plume mitigation process and system includes either mixing secondary heat into a moisture rich exhaust gas stream, or diverting a moisture rich exhaust gas stream into a primary exhaust stack having hot exhaust gases flowing therethrough. Moisture rich exhaust gas from a liquid concentrator may be diverted into a high temperature exhaust stack of an engine, a generator, or a flare. The high temperature exhaust gases from the engine, the generator, or the flare raise the temperature of the moisture rich exhaust gas from the concentrator. The high temperature exhaust gases from the engine, the generator, or the flare are also lower in moisture content, so that the moisture rich exhaust gas from the concentrator is diluted by the drier high temperature exhaust gas. As a result, the mixed gas is less likely to develop a moisture plume upon exit to the atmosphere.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: May 13, 2014
    Assignee: Heartland Technology Partners LLC
    Inventors: Bernard F. Duesel, Jr., Michael J. Rutsch, Craig Clerkin
  • Patent number: 8716169
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for preventing the poisoning and/or contamination of an SCR catalyst. In another embodiment, the method and apparatus of the present invention is designed to protect an SCR catalyst, while simultaneously providing emission control.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: May 6, 2014
    Assignee: Babcock & Wilcox Power Generation Group, Inc.
    Inventors: Mandar R. Gadgil, S. Behrooz Ghorishi, Donald P. Tonn
  • Publication number: 20140116304
    Abstract: The present disclosure relates to a method of operating a boiler system that includes an oxy-fuel boiler in which an oxygen stream and a fuel stream are combusted to generate a flue gas stream. An air separation unit produces the oxygen stream for the oxy-fuel boiler. A gas processing unit cleans and compresses at least a portion of the flue gas stream generated in the oxy-fuel boiler producing a pressurized carbon dioxide stream. The method includes operating the boiler system, at least for a period of time, in a recirculation mode, during which a carbon dioxide stream from a CO2 compression unit within the gas processing unit is evaporated in the air separation unit and forwarded as a stream to the gas processing unit. The present disclosure further relates to a boiler system for an oxy-fuel process as well as to a power plant comprising such a system. The present disclosure also relates to the use of a carbon dioxide containing stream as a refrigerant.
    Type: Application
    Filed: October 30, 2013
    Publication date: May 1, 2014
    Applicant: ALSTOM Technology Ltd
    Inventor: Markus Joerg WEITZEL
  • Publication number: 20140109806
    Abstract: A hybrid wood-burning fireplace assembly configured for burning wood-based fuel, wherein the burning generates combustion exhaust. The assembly comprising a fire box having an interior area, a baffle in the interior area defining lower and upper combustion chambers relative to the baffle. The upper combustion chamber has an upper exhaust passageway between baffle and the top portion of the firebox. A secondary combustion airway has air outlets in the firebox that direct the secondary combustion air adjacent to the baffle to mix with the exhaust for non-catalytic secondary combustion of the exhaust before the exhaust flows through the upper exhaust passageway. A catalytic combustion unit is positioned above the baffle and across the upper exhaust passageway, whereby the exhaust will pass through the catalytic combustion unit after the non-catalytic secondary combustion of the exhaust and before the exhaust exits the upper combustion chamber through the upper exhaust passageway.
    Type: Application
    Filed: September 17, 2013
    Publication date: April 24, 2014
    Applicant: Travis Industries, Inc.
    Inventors: Alan R. Atemboski, Kurt W.F. Rumens, Russell A. McBrian, Jeremy Halston
  • Publication number: 20140109807
    Abstract: A method and a device remove mercury from exhaust gases during a production of cement clinker. The device contains a pre-heating stage, a feed point for raw materials required for the production of the cement clinker, a rotary kiln for burning the raw materials, a filter stage for removing dust from the exhaust gases conducted in the main flow, and a raw mix mill for partially mill drying the raw materials. A circuit for the mercury in the exhaust gases is formed between the pre-heating stage and the raw mix mill or the filter stage. To achieve good mercury removal at low cost, a sub-flow of 1 to 30 volume percent of the exhaust gases is branched off from the main flow of the exhaust gases having a temperature of at least 300° C. A separator and thereafter at least one stage for removing mercury are arranged in the sub-flow.
    Type: Application
    Filed: May 21, 2012
    Publication date: April 24, 2014
    Applicant: SCHEUCH GMBH
    Inventors: Andreas Steinwandter, Manfred Lisberger
  • Patent number: 8703064
    Abstract: An apparatus and method is presented for reducing mono nitrogen oxide emissions in a hydrocarbon processing furnace. A preferred embodiment hydrocarbon cracking furnace includes a firebox with a set of wall burners and a set of floor burners, the floor burners comprising secondary burner tips burning a fuel-rich mixture and positioned below primary burner tips burning a fuel-lean mixture. A portion of flue gases are recirculated from the primary burner combustion area to the secondary burner combustion area and back to the primary burner combustion area. The floor burners further comprise a set of steam injection ports that inject steam into a conical flow to contact flames at the primary burner tips, reducing flame temperature and thereby reducing thermal NOx. The steam injection ports are positioned in the firebox above the primary burner tips.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: April 22, 2014
    Assignee: WPT LLC
    Inventor: David C. Payne
  • Publication number: 20140106284
    Abstract: The present disclosure relates to a boiler system that includes an oxyfuel boiler in which a stream of oxygen and a fuel are combusted to generate a stream of flue gas. A flue gas condenser condenses the cleaned flue gas. A flue gas compression unit produces a stream of pressurized carbon dioxide rich flue gas. A pressure control system measures and controls the pressure after the flue gas conditioning system to a predetermined set value. A flow control system measures and controls the flow after the flue gas compression unit to a predetermined set value. The present disclosure further relates to a method of operating such a boiler system for an oxy-fuel process as well as to a power plant comprising such a system.
    Type: Application
    Filed: October 17, 2013
    Publication date: April 17, 2014
    Applicant: ALSTOM Technology Ltd
    Inventor: Olaf STALLMANN
  • Publication number: 20140102343
    Abstract: The present invention relates to a method and system for combustion of a fuel and treatment of the resulting flue gas.
    Type: Application
    Filed: October 16, 2013
    Publication date: April 17, 2014
    Applicant: ALSTOM Technology Ltd
    Inventors: Olaf STALLMANN, Gerhard Heinz, Peter Ulrich Koss
  • Patent number: 8695516
    Abstract: The present invention provides improved boiler assemblies (10) with enhanced pollution abatement properties through injection and recycling of particulate sorbent materials including sodium bicarbonate, trona, and mixtures thereof. The assemblies (10) include a boiler (12), economizer (14), air heater (15), and recirculation reactor (16). Fresh sorbent material is introduced via assembly (60) into the boiler assembly (10) at one or more injection locations, and serves to sorb NOx, SOx, and other pollutants in the flue gas. The flue gas and entrained sorbent material then pass through reactor (16) for separation of sorbent, which is then recycled for injection back into the assembly (10) upstream of reactor (16). In another aspect, the invention provides pollution abatement apparatus (110) and methods employing an upstream recirculation reactor (114), a supply of fresh sorbent (118), and a downstream collector (116).
    Type: Grant
    Filed: August 20, 2011
    Date of Patent: April 15, 2014
    Assignee: Industrial Accessories Company
    Inventor: Pramodh Nijhawan
  • Patent number: 8691719
    Abstract: The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for reducing or preventing the poisoning and/or contamination of an SCR catalyst. In another embodiment, the method and apparatus of the present invention is designed to protect the SCR catalyst. In still another embodiment, the present invention relates to a method and apparatus for increasing the service life and/or catalytic activity of an SCR catalyst while simultaneously controlling various emissions.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: April 8, 2014
    Assignee: Babcock & Wilcox Power Generation Group, Inc.
    Inventors: Mandar R. Gadgil, S. Behrooz Ghorishi
  • Patent number: 8689709
    Abstract: A pressurized transport oxy-combustor with different configurations is disclosed. Substantially pure oxygen is fed to the transport oxy-combustor under pressure to combust fossil fuels, generating steam for power generation. The end product is the flue gas containing substantially pure CO2 after moisture condensation. The low excess oxygen necessary to achieve complete combustion in the combustor is scavenged by adding another fuel so that substantially all oxygen fed to the combustor is completely consumed. The capability to operate the transport oxy-combustor as a circulating fluidized bed combustor at very high solids circulation rates makes it unnecessary to use recycled CO2 or flue gas as a means to moderate and control the combustion temperature. The temperature in the combustor is effectively controlled by relatively cooler circulating solids that enter the combustion zone. A small amount of CO2 is recycled for aeration and to convey solids fuel to the combustor.
    Type: Grant
    Filed: February 26, 2012
    Date of Patent: April 8, 2014
    Assignee: Southern Company
    Inventors: Pannalal Vimalchand, Guohai Liu, WanWang Peng
  • Publication number: 20140076213
    Abstract: A process of producing a feed from a solid oxide electrolysis cell. A first portion of the flue gas produced from a combustion process is directed to the anode side of the solid oxide electrolysis cell. The feed and a second portion of the flue gas are then mixed to produce an enhanced feed. The enhanced feed is then mixed with fuel and combusted in the combustion process to produce flue gas. The flue gas comprises greater than 50 wt % CO2 and less than 1 wt % N2.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 20, 2014
    Applicant: PHILLIPS 66 COMPANY
    Inventors: David B. Ingram, Uchenna P. Paul
  • Publication number: 20140080071
    Abstract: A gas treatment plant (3) for treating an industrial waste gas comprising carbon dioxide comprises an oxyfuel boiler (100) and a pipe (109; 122; 180) arranged for forwarding the industrial waste gas to the oxyfuel boiler (100) and injecting the industrial waste gas into the oxyfuel boiler (100) to participate in the combustion process occurring in the boiler (100) to cause oxidation of at least a portion of the content of at least one oxidizable substance of the industrial waste gas. The gas treatment plant (3) further comprises a gas cleaning system (108), and a pipe (126) for forwarding a carbon dioxide rich flue gas generated in the boiler (100) to the gas cleaning system (108) for being cleaned therein, such that an at least partly cleaned carbon dioxide rich flue gas is formed.
    Type: Application
    Filed: September 20, 2012
    Publication date: March 20, 2014
    Applicant: ALSTOM TECHNOLOGY LTD
    Inventors: Ulrich Koss, Glen D. Jukkola
  • Patent number: 8662883
    Abstract: Apparatus is described for combusting exhaust gases output from a plurality of process chambers. The apparatus comprises a plurality of exhaust gas combustion nozzles (22) connected to a combustion chamber (24). Each nozzle receives a respective exhaust gas (26), and comprises means for receiving a fuel (40) and an oxidant (30) for use in forming a combustion flame within the chamber. A controller receives data indicative of the chemistry of the exhaust gas supplied to each nozzle, and adjusts the relative amounts of fuel and oxidant supplied to each nozzle in response to the received data. This can enable the nature of each combustion flame to be selectively modified according to the nature of the exhaust gases to be destroyed by that flame, thereby enhancing the destruction rate efficiency of the exhaust gas and optimising fuel consumption.
    Type: Grant
    Filed: May 3, 2006
    Date of Patent: March 4, 2014
    Assignee: Edwards Limited
    Inventors: Darren Mennie, Nicholas Benjamin Jones, Colin Michael Harrison
  • Patent number: 8661993
    Abstract: In an exhaust gas treatment system including a denitration device that removes nitrogen oxide in exhaust gas from a heavy fuel-fired boiler, an air preheater that recovers heat in the gas after the nitrogen oxide is removed, an electric precipitator that removes dust while adding ammonia into the gas after heat recovery, a desulfurization device that removes sulfur oxide in the gas after dust removal, and a stack that exhausts the gas after desulfurization to the outside, an ash-shear-force measuring instrument is provided to measure an ash shear force, which is ash flowability, on the downstream side of the electric precipitator, so that a feed rate of an air supply unit that supplies air to the boiler is reduced according to ash shear-force information.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: March 4, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Naoyuki Kamiyama, Tomoo Akiyama, Toshihiko Setoguchi, Koutaro Fujimura, Yoshihisa Yamamoto, Koichi Tagami, Yasutoshi Ueda
  • Publication number: 20140053761
    Abstract: A system for producing carbon dioxide from a process gas that includes a hydrocarbon, the system including a combustion subsystem configured to combust the hydrocarbon and output a combustion effluent, wherein the combustion effluent includes carbon dioxide and water, a first separation subsystem configured to separate a first quantity of carbon dioxide from the combustion effluent, and a second separation subsystem configured to separate a second quantity of carbon dioxide from the combustion effluent.
    Type: Application
    Filed: February 14, 2013
    Publication date: February 27, 2014
    Applicant: The Boeing Company
    Inventor: D. Anthony Galasso
  • Patent number: 8652235
    Abstract: A promoted carbon and/or non-carbon base sorbent are described that are highly effective for the removal of mercury from flue gas streams. The promoted sorbent comprises a carbon and/or non-carbon base sorbent that has reacted with and contains forms of halogen and halides. Optional components may be added to increase and/or preserve reactivity and mercury capacity. These may be added directly with the base sorbent, or in-flight within a gas stream (air, flue gas, etc.), to enhance base sorbent performance and/or mercury capture. Mercury removal efficiencies obtained exceed conventional methods. The promoted sorbent can be regenerated and reused. Base sorbent treatment and preparation methods are also described. Methods for in-flight preparation, introduction, and control of the active base sorbent into the mercury contaminated gas stream are described.
    Type: Grant
    Filed: April 23, 2009
    Date of Patent: February 18, 2014
    Assignee: Energy & Environmental Research Center Foundation
    Inventors: Edwin S. Olson, Michael J. Holmes, John H. Pavlish
  • Publication number: 20140041562
    Abstract: A boiler system (101) comprises a boiler (2) for combusting a fuel in the presence of a gas containing oxygen gas, and a gas cleaning system (106). The boiler system (101) comprises a compression device being operative for pressurizing at least a portion of the carbon dioxide rich flue gas from which at least a portion of the contaminant content has been removed, and a carbon dioxide supply duct (142; 143; 145) being operative for forwarding at least a portion of the pressurized carbon dioxide rich flue gas to at least one gas cleaning device (108; 110; 111) for being utilized as a utility gas therein.
    Type: Application
    Filed: November 10, 2011
    Publication date: February 13, 2014
    Applicant: ALSTOM TECHNOLOGY, LTD
    Inventor: Jörgen P. Grubbström
  • Publication number: 20140023975
    Abstract: A process of producing a feed form a solid electrolyte oxygen separator and combusting the feed in a steam methane reforming furnace to produce a flue gas.
    Type: Application
    Filed: July 9, 2013
    Publication date: January 23, 2014
    Inventors: Uchenna Prince Paul, David Brooke Ingram
  • Patent number: 8632741
    Abstract: A system and method according to which exhaust is directed from a stationary exhaust source and through a burner, and a combustible fluid is vented from at least one combustible fluid source other than the stationary exhaust source. The combustible fluid is captured and directed to flow from the combustible fluid source and towards the burner, and at least air is mixed with the captured combustible fluid to form a mixture. The mixture is introduced into the burner and burned therein to thereby pre-heat the exhaust flowing therethrough. The pre-heated exhaust contacts a catalyst.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: January 21, 2014
    Assignee: Dresser-Rand Company
    Inventors: Jon K. Tice, Loran Novacek
  • Publication number: 20140013661
    Abstract: A manufacturing process is disclosed for preparing torrefied biomass having a reduced inorganic content which comprises passing crude torrefied biomass through one or more selective separation devices capable of separating inorganic particulate matter from the torrefied biomass.
    Type: Application
    Filed: March 21, 2012
    Publication date: January 16, 2014
    Applicant: HM3 ENERGY, INC.
    Inventors: William C. Breneman, David T. Carter, Howard J. Dawson, Andrew J. Green, Hiroshi Morihara, Richard F. Palmer
  • Publication number: 20130333598
    Abstract: A converter exhaust gas recovery apparatus includes a furnace top oxygen analyzer that analyzes an oxygen concentration in exhaust gas on an exhaust gas path and on an upstream side of a dust collection position where dust collection is performed and a furnace top CO analyzer that analyzes a CO concentration in the exhaust gas; and a furnace bottom oxygen analyzer that irradiates the exhaust gas that flows on a downstream side of the dust collection position with a laser light and analyzes the oxygen concentration based on quantity-of-light changes caused by a light absorption of the laser light.
    Type: Application
    Filed: May 30, 2012
    Publication date: December 19, 2013
    Applicant: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Naoki Furukawa, Haruo Kohtaki
  • Patent number: 8603224
    Abstract: A method for the removal of mercury from a stream of flue gas obtained from the combustion of at least one coal includes the steps of introducing a kaolin- or metakaolin-containing sorbent into the stream of flue gas for removing mercury from the stream of flue gas and contacting the mercury with the kaolin or metakaolin-containing sorbent in the presence of active free silica. Further to the introduction of the kaolin- or metakaolin-containing sorbent into the stream of flue gas, a source of active free silica is introduced so as to increase the active free silica content of the flue gas resulting from the combustion by the introduction of additional free silica. The flue gas has a temperature of at least approximately 900° C., for example >1000° C. at the point where the kaolin or metakaolin-containing sorbent is introduced.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: December 10, 2013
    Assignee: Voith Patent GmbH
    Inventor: Joseph J. P. Biermann
  • Patent number: 8601960
    Abstract: In an apparatus of controlling an exhaust gas in an oxyfuel combustion boiler having the boiler 4 provided with burners 6 and a two-stage combustion port 7, a primary recirculation line 12 through which pulverized coal obtained by a mill 3 is fed to the burners 6 of the boiler 4 by the primary recirculating exhaust gas, a secondary recirculation line 14 through which another portion of the exhaust gas in recirculation is fed to a wind box 5 of the boiler 4, an oxygen producer 23, a direct supply line 25 through which a portion of oxygen produced by the oxygen producer 23 is directly fed to the burner 6 and a secondary oxygen mixing line 24 through which another portion of oxygen produced by the oxygen producer 23 is fed to the secondary recirculation line 14, the apparatus comprises an oxygen supply line 26 through which oxygen is fed to the two-stage combustion port of the boiler 4 and a flow rate regulator 20, 27 in the oxygen supply line for adjusting oxygen density.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: December 10, 2013
    Assignees: IHI Corporation, Electric Power Development Co., Ltd.
    Inventors: Shuuhei Terushita, Toshihiko Yamada, Shuzo Watanabe, Terutoshi Uchida
  • Publication number: 20130319304
    Abstract: A method of burning a fuel with high efficiency comprises providing a combustion chamber having a combustion region, providing a natural fuel within the combustion chamber on one side of the combustion region, providing a filtered fuel, and providing a substantially cylindrical injector on an opposing side of the combustion region, the injector comprising: an exhaust port in an axial center of the injector; a notch surrounding a circumference of the injector; and a plurality of intake ports in a periphery of the injector and configured to port fluid from the notch to the combustion region. The flow of the fluid toward the center of the combustion region, while the natural fuel is burning within the combustion chamber, causes at least one vortex in which the combustible substances further burn with the air and the filtered fuel.
    Type: Application
    Filed: December 21, 2012
    Publication date: December 5, 2013
    Inventor: Douglas Thompson
  • Patent number: 8580019
    Abstract: An apparatus and method is presented for removing acid gases and other trace contaminants to very low levels in combustible gases generated from thermal gasification of biomass or refuse-derived fuels. The invention includes optimization of geometric variables, temperature and pressure set points via use of a pressurized bubbling fluidized bed reactor to convert granular raw (non-activated) sorbents and auto-generated biochar sorbents) into activated, highly dispersed, and ideally sized particles for removing acid gases and toxic metals. The system can incorporate a generated gas cooler, a gas-sorbent contact chamber or zone, and a novel filter (with or without additional gas cooling and residence time stages).
    Type: Grant
    Filed: May 13, 2011
    Date of Patent: November 12, 2013
    Assignee: Frontline BioEnergy, LLC
    Inventors: John P. Reardon, Thomas J. Paskach, Paul Evans
  • Patent number: 8578965
    Abstract: The present invention relates generally to a device and method for supplying a sorbent, at one or more various desired supply points in a flue gas stream, to boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.). In one embodiment, the device of the present invention that is designed to supply a sorbent comprises a series of coaxial pipes. In another embodiment, the device of the present invention that is designed to supply a sorbent comprises a mixing section with a plurality of distribution vanes contained in at least one mixing section.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: November 12, 2013
    Assignee: Babcock & Wilcox Canada Ltd.
    Inventors: Steven S. Klages, C. Malcolm MacKenzie, Xiaojie Zhang
  • Patent number: 8578868
    Abstract: An oxyfuel combustion boiler plant comprising: an air separation unit for manufacturing oxygen by separating nitrogen from air, a boiler having a burner for burning the oxygen supplied from the air separation unit and pulverized coal, and a primary system pipe for supplying the pulverized coal to the burner, an exhaust gas recirculation system pipe for supplying combustion exhaust gas discharged from the boiler to the primary system pipe, and a carbon dioxide capture unit for capturing carbon dioxide in the exhaust gas discharged from the boiler, the oxyfuel combustion boiler plant is further comprising: an oxygen supply pipe for supplying the oxygen manufactured by the air separation unit to the primary system pipe in the burner, and a pipe for supplying the combustion exhaust gas discharged from the boiler to the oxygen supply pipe, wherein an injection port of the oxygen supply pipe is disposed on an upstream side of an injection portion of the burner.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: November 12, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Masayuki Taniguchi, Tsuyoshi Shibata, Yoshiharu Hayashi
  • Patent number: 8574349
    Abstract: A method for the removal of mercury from a stream of flue gas obtained from the combustion of at least one coal type having an ASTM D388 coal rank of <3 includes the steps of introducing a kaolin or metakaolin-containing sorbent into the stream of flue gas and contacting the mercury with the kaolin or metakaolin-containing sorbent at a point where both the kaolin or metakaolin-containing sorbent and active free silica are present in the stream. The temperature of the flue gas is at least 900° C. The active free silica content of the flue gas resulting from the combustion of the coal is supplemented by the introduction of added active free silica such that the weight percentage of the total amount of active free silica relative to the weight of kaolin or metakaolin is at least 10%, the weight of any kaolin being expressed as the weight of metakaolin.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: November 5, 2013
    Assignee: Voith Patent GmbH
    Inventor: Joseph J. P. Biermann
  • Publication number: 20130276682
    Abstract: The present disclosure is directed to the use of elemental or speciated iodine and bromine to control total mercury emissions.
    Type: Application
    Filed: June 18, 2013
    Publication date: October 24, 2013
    Inventors: Michael D. Durham, Sharon Sjostrom, Kenneth E. Baldrey
  • Patent number: 8561555
    Abstract: An oxyfuel combustion boiler plant having a first boiler and a second boiler for injecting gas including oxygen in higher concentration than that in the air, gas including carbon dioxide in higher concentration than that in the air, and fuel from a burner and generating steam by combustion gas in a furnace, respectively, comprising: an exhaust gas supply pipe for supplying exhaust gas discharged from the first boiler to a burner of the second boiler, and a gas flow rate control apparatus for controlling a flow rate of exhaust gas flowing through the exhaust gas supply pipe.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: October 22, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Akihiro Yamada, Tsuyoshi Shibata, Yoshiharu Hayashi
  • Patent number: 8555797
    Abstract: Disclosed herein is a NOx reducing system comprising a first inner conduit in fluid communication with a reactant source; and a first outer conduit comprising an open end for receiving the first inner conduit and a closed end; the first outer conduit comprising a port for discharging reactant from the reactant source into an exhaust gas stream. Also disclosed herein is a NOx reducing system comprising a conduit comprising a closed end and an open end that is in fluid communication with a reactant source; the conduit comprising a port for discharging reactant from the reactant source into an exhaust gas stream; the port being located on a downstream surface of the first outer conduit.
    Type: Grant
    Filed: May 10, 2007
    Date of Patent: October 15, 2013
    Assignee: Alstom Technology Ltd
    Inventor: Iqbal F. Abdulally
  • Patent number: 8550810
    Abstract: A method of controlling a boiler plant during a switchover period from an air-combustion mode to an oxygen-combustion mode. The method includes steps of feeding fuel into a furnace of the boiler plant at a rate determined by a fuel feeding scheme, feeding air into the furnace at a rate determined by a descending air feeding scheme, feeding substantially pure oxygen into the furnace at a rate determined by an ascending oxygen feeding scheme, and recirculating flue gas into the furnace at a rate determined by an ascending flue gas recirculating scheme. The fuel feeding scheme, the air feeding scheme and the oxygen feeding scheme are such that the fuel is combusted and the flue gas containing residual oxygen is produced. Also, the fuel feeding scheme, the air feeding scheme and the oxygen feeding scheme are such that the content of residual oxygen in the flue gas is, during at least a portion of the switchover period, greater than during any of the air-combustion mode and the oxygen-combustion mode.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: October 8, 2013
    Assignee: Foster Wheeler North America Corp.
    Inventors: Andrew Seltzer, Zhen Fan, Horst Hack