Patents by Inventor Minggui XIA

Minggui XIA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10336955
    Abstract: A gasifier, including a vertically disposed furnace body, a monitoring unit, and a microwave plasma generating device. The furnace body includes a material and fuel inlet, a syngas outlet, an oxygen/vapor inlet, and a slag outlet. The furnace body has a clearance zone in an upper part thereof and a fixed bed zone in a lower part thereof. The slag outlet is disposed at the bottom of the furnace body. The monitoring unit is disposed close to the syngas outlet. At least one microwave plasma generating device is disposed on the furnace body.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: July 2, 2019
    Assignee: WUHAN KAIDI GENERAL RESEARCH INSTITUTE OF ENGINEERING & TECHNOLOGY CO., LTD.
    Inventors: Yilong Chen, Yanfeng Zhang, Minggui Xia, Liang Zhang
  • Patent number: 10119076
    Abstract: A gasifier including a vertically disposed furnace body, a feeder disposed in a middle part of the furnace body and communicating with the furnace body, one or two layers of microwave plasma generators, an external heater configured to supply external thermal energy for the gasifier, and a monitoring unit. The furnace body includes an upper nozzle for spraying vapor, a lower nozzle for spraying CO2/vapor, a syngas outlet disposed at a top of the furnace body. The upper nozzle for spraying vapor is disposed in a clearance zone of the furnace body, and the lower nozzle for spraying CO2/vapor is disposed in a bed zone of the furnace body. The monitoring unit is disposed close to the syngas outlet. The one or two layers of microwave plasma generators are disposed above the upper nozzle in the clearance zone of the gasifier.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: November 6, 2018
    Assignee: WUHAN KAIDI GENERAL RESEARCH INSTITUTE OF ENGINEERING & TECHNOLOGY CO., LTD.
    Inventors: Yilong Chen, Yanfeng Zhang, Minggui Xia, Liang Zhang
  • Patent number: 10077407
    Abstract: A biomass gasification system. The system includes: a) a gasifier; b) a waste heat exchanger; c) a waste heat boiler; d) a cyclone separator; e) a gas scrubber; f) a shift reactor; g) a desulfurizing tower; h) a first decarburizing tower; i) a synthesizing tower; and j) a second decarburizing tower. In the system, the gasifier, the waste heat exchanger, the cyclone separator, the gas scrubber, the shift reactor, the desulfurizing tower, the first decarburizing tower, the synthesizing tower, and the second decarburizing tower are connected sequentially. In addition, CO2 outlets of the first decarburizing tower and the second decarburizing tower are both connected to a cold medium inlet of the waste heat exchanger; and a cold medium outlet of the waste heat exchanger is connected to a gasifying agent entrance of the gasifier.
    Type: Grant
    Filed: September 11, 2016
    Date of Patent: September 18, 2018
    Assignee: WUHAN KAIDI ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Yanfeng Zhang, Liang Zhang, Minggui Xia, Wenyan Liu
  • Publication number: 20180105759
    Abstract: A method for purifying and cooling biomass syngas. The method includes: 1) cooling biomass syngas to 520-580° C., and recycling waste heat to yield a first steam; then subjecting the biomass syngas to cyclone dust removal treatment; and further cooling the biomass syngas to a temperature of ?210° C., and recycling waste heat to yield a second steam; 2) removing a portion of heavy tar precipitating out of the biomass syngas during the second-stage indirect heat exchange; 3) carrying out dust removal and cooling using a scrub solution, to scrub off most of dust, tar droplets, and water soluble gases from the biomass syngas after the heat exchange and dust removing treatment; and 4) conducting deep removal of dust and tar with a wet gas stream, to sweep off remains of dust and tar fog in the scrubbed biomass syngas.
    Type: Application
    Filed: December 14, 2017
    Publication date: April 19, 2018
    Inventors: Yanfeng ZHANG, Hongtao NIE, Minggui XIA, Wenyan LIU, Liang ZHANG
  • Patent number: 9873841
    Abstract: A method for gasifying biomass using a gasifier, the gasifier including a furnace body and a fuel pretreatment system. The method includes 1) crushing and sieving a biomass fuel to yield particle size-qualified fuel particles, 2) exciting working gas to yield plasma, and spraying the plasma into the gasifier, 3) spraying the particle size-qualified fuel particles into the gasifier via nozzles, synchronously spraying an oxidizer via an oxygen/vapor inlet into the gasifier, and 4) monitoring the temperature and components of the syngas, regulating an oxygen flow rate, a vapor flow rate, and microwave power to maintain the process parameters within a preset range and to control a temperature of the syngas to be between 900 and 1200° C., collecting the syngas from the syngas outlet at the top of the furnace body, and discharging liquid slag from the slag outlet.
    Type: Grant
    Filed: November 6, 2016
    Date of Patent: January 23, 2018
    Assignee: WUHAN KAIDI ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Yilong Chen, Yanfeng Zhang, Minggui Xia, Liang Zhang
  • Publication number: 20170051216
    Abstract: A method for gasifying biomass using a gasifier, the gasifier including a furnace body and a fuel pretreatment system. The method includes 1) crushing and sieving a biomass fuel to yield particle size-qualified fuel particles, 2) exciting working gas to yield plasma, and spraying the plasma into the gasifier, 3) spraying the particle size-qualified fuel particles into the gasifier via nozzles, synchronously spraying an oxidizer via an oxygen/vapor inlet into the gasifier, and 4) monitoring the temperature and components of the syngas, regulating an oxygen flow rate, a vapor flow rate, and microwave power to maintain the process parameters within a preset range and to control a temperature of the syngas to be between 900 and 1200° C., collecting the syngas from the syngas outlet at the top of the furnace body, and discharging liquid slag from the slag outlet.
    Type: Application
    Filed: November 6, 2016
    Publication date: February 23, 2017
    Inventors: Yilong CHEN, Yanfeng ZHANG, Minggui XIA, Liang ZHANG
  • Publication number: 20160376513
    Abstract: A biomass gasification system. The system includes: a) a gasifier; b) a waste heat exchanger; c) a waste heat boiler; d) a cyclone separator; e) a gas scrubber; f) a shift reactor; g) a desulfurizing tower; h) a first decarburizing tower; i) a synthesizing tower; and j) a second decarburizing tower. In the system, the gasifier, the waste heat exchanger, the cyclone separator, the gas scrubber, the shift reactor, the desulfurizing tower, the first decarburizing tower, the synthesizing tower, and the second decarburizing tower are connected sequentially. In addition, CO2 outlets of the first decarburizing tower and the second decarburizing tower are both connected to a cold medium inlet of the waste heat exchanger; and a cold medium outlet of the waste heat exchanger is connected to a gasifying agent entrance of the gasifier.
    Type: Application
    Filed: September 11, 2016
    Publication date: December 29, 2016
    Inventors: Yanfeng ZHANG, Liang ZHANG, Minggui XIA, Wenyan LIU
  • Patent number: 9518235
    Abstract: A microwave plasma based entrained flow gasifier of biomass, including a furnace body and a fuel pretreatment system. The furnace body includes a fuel inlet disposed at the lower part of the furnace body, a syngas outlet disposed at the top of the furnace body, and a slag outlet disposed at the bottom of the furnace body. The fuel inlet presents in the form of nozzles. The fuel pretreatment system is disposed outside of the furnace body, and includes a fuel crushing apparatus, a sieving apparatus disposed downstream to the fuel crushing apparatus, a first fuel container for receiving particle size-qualified fuel, a second fuel container for receiving particle size-unqualified fuel, and a feeding hopper disposed downstream to the first fuel container. The first fuel container and the second fuel container are disposed side-by-side downstream to the sieving apparatus.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: December 13, 2016
    Assignee: WUHAN KAIDI ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Yilong Chen, Yanfeng Zhang, Minggui Xia, Liang Zhang
  • Patent number: 9469820
    Abstract: A method for recycling carbon dioxide from biomass gasification. The method includes: 1) employing carbon dioxide as a gasifying agent, allowing the carbon dioxide to gasify biomass to yield syngas; 2) cooling the syngas; 3) introduced cooled syngas to a cyclone separator and a gas scrubber for dust removal and purification; 4) allowing purified syngas in 3) to react with the vapor to modify a ratio of hydrogen to carbon monoxide of the syngas; 5) desulfurizing modified syngas to remove H2S and COS therein; 6) decarburizing desulfurized syngas to separate carbon dioxide therein; 7) introducing desulfurized and decarburized syngas to a synthesizing tower to yield oil products and exhaust gas including carbon dioxide; 8) decarburizing the exhaust gas including carbon dioxide and separating the carbon dioxide; and 9) introducing the carbon dioxide separated in 6) and 8) to 1) as the gasifying agent for gasification.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: October 18, 2016
    Assignee: WUHAN KAIDI ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Yanfeng Zhang, Liang Zhang, Minggui Xia, Wenyan Liu
  • Patent number: 9410096
    Abstract: A method for cooling and washing biomass syngas, the method including the following steps: 1) introducing biomass syngas having a temperature of between 1000 and 1100° C., a dust content of less than 20 g/Nm3, and a tar content of less than 3 g/Nm3 to a quench tower for condensing a slag; 2) introducing the biomass syngas after slag condensation to a waste heat boiler for recovering waste heat and condensing a heavy tar in the syngas; 3) introducing the biomass syngas from the waste heat boiler to a scrubbing-cooling tower for removing dust and decreasing a temperature of the syngas; and 4) introducing the biomass syngas after dust removal and temperature decrease from the scrubbing-cooling tower to an electro-precipitator for further removal of the dust and the tar.
    Type: Grant
    Filed: June 27, 2014
    Date of Patent: August 9, 2016
    Assignee: WUHAN KAIDI ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Yanfeng Zhang, Wenyan Liu, Minggui Xia, Liang Zhang
  • Patent number: 9410095
    Abstract: A method of gasification of biomass using a gasification island. The gasification island includes: a biomass pre-treatment and storage unit, a biomass feeder, an external heat source, a gasifier, a crude syngas cooling unit, a crude syngas washing unit, a fresh syngas storage unit, and an ash and wastewater treatment unit. The method includes: pre-treating and storing biomass, gasifying the biomass in the gasifier, cooling a crude syngas, washing and removing dust from the crude syngas, and storing fresh syngas.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: August 9, 2016
    Assignee: WUHAN KAIDI ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Yanfeng Zhang, Minggui Xia, Hongtao Nie, Wenyan Liu, Liang Zhang
  • Patent number: 9409775
    Abstract: A method for purifying biomass syngas, including: a) introducing syngas out of a gasifier, through a water-cooling flue to a water-cooling quench tower; b) introducing the syngas from the water-cooling quench tower to a waste heat boiler of a water-tube type and a waste heat boiler of a heat-tube type; c) washing the syngas from the waste heat boiler of the heat-tube type in a Venturi scrubber in the absence of a filler to remove dust; d) introducing the syngas from the Venturi scrubber to a wet electrical dust precipitator for conducting dust removal and tar mist removal; and e) extracting the syngas by a coal gas draft fan, and transporting the syngas to a wet gas tank for storage or to a downstream process for use.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: August 9, 2016
    Assignee: WUHAN KAIDI ENGINEERING TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Yanfeng Zhang, Hongtao Nie, Minggui Xia, Wenyan Liu, Liang Zhang
  • Patent number: 9309115
    Abstract: A method for purifying biomass syngas under a positive pressure. The method includes: 1) aerating a pyrolysis gasifier by using an oxidation fan; 2) introducing syngas produced in the pyrolysis gasifier through a water-cooling flue to a water-cooling quench tower; 3) introducing the syngas from the water-cooling quench tower to a waste heat boiler of a water-tube type and a waste heat boiler of a heat-tube type; 4) introducing the syngas from the waste heat boiler of the heat-tube type to a Venturi scrubber in the absence of a filler to wash the syngas and remove dust; 5) introducing the syngas from the Venturi scrubber to a wet electrical dust precipitator for further removing the dust; and 6) transporting qualified syngas to a wet gas tank for storage or to a downstream process for use.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: April 12, 2016
    Assignee: Wuhan Kaidi General Research Institute of Engineering & Technology Co., Ltd.
    Inventors: Yanfeng Zhang, Hongtao Nie, Minggui Xia, Wenyan Liu, Liang Zhang
  • Publication number: 20150141536
    Abstract: A method for recycling carbon dioxide from biomass gasification. The method includes: 1) employing carbon dioxide as a gasifying agent, allowing the carbon dioxide to gasify biomass to yield syngas; 2) cooling the syngas; 3) introduced cooled syngas to a cyclone separator and a gas scrubber for dust removal and purification; 4) allowing purified syngas in 3) to react with the vapor to modify a ratio of hydrogen to carbon monoxide of the syngas; 5) desulfurizing modified syngas to remove H2S and COS therein; 6) decarburizing desulfurized syngas to separate carbon dioxide therein; 7) introducing desulfurized and decarburized syngas to a synthesizing tower to yield oil products and exhaust gas including carbon dioxide; 8) decarburizing the exhaust gas including carbon dioxide and separating the carbon dioxide; and 9) introducing the carbon dioxide separated in 6) and 8) to 1) as the gasifying agent for gasification.
    Type: Application
    Filed: January 27, 2015
    Publication date: May 21, 2015
    Inventors: Yanfeng ZHANG, Liang ZHANG, Minggui XIA, Wenyan LIU
  • Publication number: 20150041720
    Abstract: A method for purifying biomass syngas, including: a) introducing syngas out of a gasifier, through a water-cooling flue to a water-cooling quench tower; b) introducing the syngas from the water-cooling quench tower to a waste heat boiler of a water-tube type and a waste heat boiler of a heat-tube type; c) washing the syngas from the waste heat boiler of the heat-tube type in a Venturi scrubber in the absence of a filler to remove dust; d) introducing the syngas from the Venturi scrubber to a wet electrical dust precipitator for conducting dust removal and tar mist removal; and e) extracting the syngas by a coal gas draft fan, and transporting the syngas to a wet gas tank for storage or to a downstream process for use.
    Type: Application
    Filed: June 24, 2014
    Publication date: February 12, 2015
    Inventors: Yanfeng ZHANG, Hongtao NIE, Minggui XIA, Wenyan LIU, Liang ZHANG
  • Publication number: 20150041719
    Abstract: A method for purifying biomass syngas under a positive pressure. The method includes: 1) aerating a pyrolysis gasifier by using an oxidation fan; 2) introducing syngas produced in the pyrolysis gasifier through a water-cooling flue to a water-cooling quench tower; 3) introducing the syngas from the water-cooling quench tower to a waste heat boiler of a water-tube type and a waste heat boiler of a heat-tube type; 4) introducing the syngas from the waste heat boiler of the heat-tube type to a Venturi scrubber in the absence of a filler to wash the syngas and remove dust; 5) introducing the syngas from the Venturi scrubber to a wet electrical dust precipitator for further removing the dust; and 6) transporting qualified syngas to a wet gas tank for storage or to a downstream process for use.
    Type: Application
    Filed: June 24, 2014
    Publication date: February 12, 2015
    Inventors: Yanfeng ZHANG, Hongtao NIE, Minggui XIA, Wenyan LIU, Liang ZHANG
  • Publication number: 20140306161
    Abstract: A gasifier, including a vertically disposed furnace body, a monitoring unit, and a microwave plasma generating device. The furnace body includes a material and fuel inlet, a syngas outlet, an oxygen/vapor inlet, and a slag outlet. The furnace body has a clearance zone in an upper part thereof and a fixed bed zone in a lower part thereof. The slag outlet is disposed at the bottom of the furnace body. The monitoring unit is disposed close to the syngas outlet. At least one microwave plasma generating device is disposed on the furnace body.
    Type: Application
    Filed: June 25, 2014
    Publication date: October 16, 2014
    Inventors: Yilong CHEN, Yanfeng ZHANG, Minggui XIA, Liang ZHANG
  • Publication number: 20140305784
    Abstract: A gasifier including a vertically disposed furnace body, a feeder disposed in a middle part of the furnace body and communicating with the furnace body, one or two layers of microwave plasma generators, an external heater configured to supply external thermal energy for the gasifier, and a monitoring unit. The furnace body includes an upper nozzle for spraying vapor, a lower nozzle for spraying CO2/vapor, a syngas outlet disposed at a top of the furnace body. The upper nozzle for spraying vapor is disposed in a clearance zone of the furnace body, and the lower nozzle for spraying CO2/vapor is disposed in a bed zone of the furnace body. The monitoring unit is disposed close to the syngas outlet. The one or two layers of microwave plasma generators are disposed above the upper nozzle in the clearance zone of the gasifier.
    Type: Application
    Filed: June 25, 2014
    Publication date: October 16, 2014
    Inventors: Yilong CHEN, Yanfeng ZHANG, Minggui XIA, Liang ZHANG
  • Publication number: 20140306160
    Abstract: A microwave plasma based entrained flow gasifier of biomass, including a furnace body and a fuel pretreatment system. The furnace body includes a fuel inlet disposed at the lower part of the furnace body, a syngas outlet disposed at the top of the furnace body, and a slag outlet disposed at the bottom of the furnace body. The fuel inlet presents in the form of nozzles. The fuel pretreatment system is disposed outside of the furnace body, and includes a fuel crushing apparatus, a sieving apparatus disposed downstream to the fuel crushing apparatus, a first fuel container for receiving particle size-qualified fuel, a second fuel container for receiving particle size-unqualified fuel, and a feeding hopper disposed downstream to the first fuel container. The first fuel container and the second fuel container are disposed side-by-side downstream to the sieving apparatus.
    Type: Application
    Filed: June 24, 2014
    Publication date: October 16, 2014
    Inventors: Yilong CHEN, Yanfeng ZHANG, Minggui XIA, Liang ZHANG
  • Publication number: 20140305043
    Abstract: A method of gasification of biomass using a gasification island. The gasification island includes: a biomass pre-treatment and storage unit, a biomass feeder, an external heat source, a gasifier, a crude syngas cooling unit, a crude syngas washing unit, a fresh syngas storage unit, and an ash and wastewater treatment unit. The method includes: pre-treating and storing biomass, gasifying the biomass in the gasifier, cooling a crude syngas, washing and removing dust from the crude syngas, and storing fresh syngas.
    Type: Application
    Filed: June 26, 2014
    Publication date: October 16, 2014
    Inventors: Yanfeng ZHANG, Minggui XIA, Hongtao NIE, Wenyan LIU, Liang ZHANG