Abstract: A premix burner arrangement for safely oxygen-enriching a premix air-fuel combustion system is disclosed. In the disclosed burner arrangement, a first conduit is arranged and disposed to provide a first gas stream. The first gas stream is a self-reactive or self-flammable premixture comprising air and a combustible gas. At least one second conduit is arranged and disposed to provide a second gas stream circumferentially around the first gas stream. The second gas stream includes oxygen. The premix burner arrangement is configured to combust or react the first stream at a temperature at least 1000° F. greater than the temperature of the second stream. A method and combustion system including the premix burner arrangement are also disclosed.

Abstract: A heater and a method of its use are configured for use at cold operating temperatures. The heater has a supply line for transporting a volume of fuel between a fuel tank and burner. An inline heater is supplied in a supply line for the burner, and preferably is located upstream of a fuel filter for filtering the fuel so as to prevent wax condensation in the filter. The heater also has a return line that normally returns unused fuel from the burner to the heater, hence reducing the volume of fuel that needs to be heated by the heater and reducing system power requirements. The heater may be thermostatically controlled to maintain the temperature of the heated fuel to a value that is at or above a temperature required for good fuel atomization but below a flashpoint of the fuel. A valve is provided in the return line to permit diversion of the returned fuel to the fuel tank during a purge operation at initial startup.

Abstract: Method for combusting a solid phase fuel, where the fuel is caused, by the help of a non-pneumatic feeding element (11), to be fed to an inlet opening (11a) in a burner device (10) having a first inlet (13a) for the oxidant through which an oxidant is caused to flow via a first supply conduit (13). The first inlet (13a) for oxidant is caused to be arranged in the form of an opening surrounding the inlet opening (11a), in that the oxidant is caused to flow out through the opening (13a) with a velocity of at least 100 m/s, through a burner pipe (16) and out through a burner orifice (17) to a combustion space (18), so that the oxidant by ejector action causes the fuel to be conveyed through the burner pipe (16) and out through the burner orifice (17).

Abstract: Apparatus and method for collecting fugitive combustible gases and adding the gases as a supplementary fuel source to an engine. The fugitive combustible gases are added to the air inletted to the air supply and a control is provided to allow adjustment of the normal fuel supplied to the engine following the addition of the fugitive combustible gases. The fugitive combustible gases provide an energy source for the engine and the combustion of the gases reduces the greenhouse effect if the gases contain methane.

Abstract: A tunable fluid flow control system for controlling combustion dynamics in a combustor is disclosed. The control system includes a fuel supply path having an inlet portion, a first diverted portion, a second diverted portion, and an exit portion. A first diverted portion has a first length and a first diameter. A second diverted portion has a second length and a second diameter and spaced apart from the first diverted portion. The first and second diverted portions converge at a merging location. The exit portion is coupled to the merging location of the first and second diverted portions. At least one flow regulation device is coupled to the inlet portion and configured to divert fuel flow to the first and second diverted portions alternately to generate fuel flow perturbations at the merging location.

Abstract: Apparatus and methods are provided for compensating for high altitude reduction in the heating capacity of a gas heating appliance, illustratively a gas-fired heating furnace. In a representative embodiment of such apparatus and methods the regulated pressure of the furnace gas valve, and the speeds of its combustion and indoor blowers, are coordinatingly increased to provide the furnace with a substantially unchanged maximum heating output despite its new higher altitude location.

Abstract: A process for operating a utility boiler.

Abstract: The system comprises a boiler (1), main burner groups (2F, 2E, 2D, 2C) located on different levels or zones through which pulverized solid fuel is injected into the boiler (1) and main mills (3F, 3E, 3D, 3C) for solid fuel, where each of them is connected to one of the main burner groups (2F, 2E, 2D, 2C) to which a flow of solid fuel is directed. As a complement, it incorporates a substitution mill (3B) intended to operate only on the main burner group (2F, 2E, 2D, 2C) whose main associated mill (3F, 3E, 3D, 3C) has stopped, as well as a support mill (3A) which operates constantly and directs an additional flow of solid fuel towards the main burner group or groups (2F, 2E, 2D, 2C) selected, supplementing the flow of solid fuel provided by the main mills (3F, 3E, 3D, 3C).

Abstract: A control system for the ignition of a gas burner that includes an electromagnetic valve having a first coil and a second coil, the activation of the first and second coils controlling the flow of gas through the electromagnetic valve. An incandescent element which is designed to be heated until it reaches the gas combustion temperature of the gas delivered to the burner is disposed electrically in series with the first coil, the incandescent element and first coil forming a first branch that is electrically parallel to the second coil.

Abstract: In one aspect, a fuel oxygenation apparatus includes a fuel oil supply fluidically coupled to the inlet of a positive displacement pump for delivery of the fuel oil to a fuel oil burner. An oxygen supply is fluidically coupled to the inlet of the positive displacement pump. During the suction cycle, a momentary vacuum is created at the pump inlet side drawing oxygen gas into the fuel line where it admixes with the fuel oil supply. Oxygenating the fuel prior to combustion increases efficiency of the burner and reduces undesirable emissions.

Abstract: A combustion method for melting glass in which two fuels of the same nature or different natures are fed into a fusion furnace at two locations remote from each other for distributing the fuel to reduce NOx emissions. The combustion air is supplied at only one of the locations. In a method for operating a glass melting furnace, the fuel injection is distributed to reduce NOx emissions. The furnace includes a melting vessel for receiving the glass to be melted and containing a bath of molten glass, walls defining the furnace, a hot combustion air inlet, a hot smoke outlet, at least one burner for injecting a first fuel, and at least one injector for injecting a second fuel. The injector has an adjustable flow complementary relative to the flow to the burner so that up to 100% of the totality of the first and second fuels used may be injected.

Abstract: A method for supplying combustion air in a vertical incinerator according to one embodiment of the present invention is such that during incineration treatment by the vertical incinerator 1, a supplied amount of combustion air a is controlled in such a manner as to be 0.2 to 0.8 times as much as a theoretical air amount that is necessary to completely combust waste R in deposit layers, and the combustion air a is supplied in such a manner as to reduce oxygen in the combustion air a from a lower portion to an upper portion of the deposit layers.

Abstract: A fuel-fired appliance is shut down when a predicted steady state combustion chamber temperature is below a known threshold. The predicted steady state temperature is based on combustion chamber temperatures during heat up of the burner and appliance.

Abstract: A method and apparatus for combustion in which a pressurized preheated liquid fuel is atomized and a portion thereof flash vaporized, creating a mixture of fuel vapor and liquid droplets. The mixture is mixed with primary combustion oxidant, producing a fuel/primary oxidant mixture which is then injected into a primary combustion chamber in which the fuel/primary oxidant mixture is partially combusted, producing a secondary gaseous fuel containing hydrogen and carbon oxides. The secondary gaseous fuel is mixed with a secondary combustion oxidant and injected into the second combustion chamber wherein complete combustion of the secondary gaseous fuel is carried out. The resulting second stage flue gas containing very low amounts of NOx is then vented from the second combustion chamber.

Abstract: In one embodiment, a method for generating heat energy includes injecting a stream having a concentration of at least 50% oxygen (O2 stream) into a primary gas stream through a mixer, the mixer discharging the O2 stream as two or more spaced jets traversing the primary stream, thereby enriching the primary gas stream. The method further includes mixing fuel with the enriched primary gas stream, thereby forming a fuel stream; and combusting the fuel stream, thereby forming a flue gas stream.

Abstract: A burner for diluted combustion includes a fuel nozzle for supplying fuel to a combustion chamber, at least one air nozzle for supplying air to the combustion chamber, and at least one oxygen nozzle for supplying oxygen to the combustion chamber. The air nozzle and oxygen nozzle are spatially separated from each other.

Abstract: The invention relates to a method for real-time, continuous adjustment of a set of thermal combustion chambers (2, 2i) having similar characteristics supplied by the same combustive agent (8) and fuel (9) networks, according to which one of the chambers (2i) is used as a reference chamber, combustion parameters are measured (7) in the fumes output from the reference chamber, and the control parameters of all the chambers (2) are adjusted according to the combustion parameters measured at the output of the reference chamber (2i), in particular according to the ratio of combustive agent to fuel and/or the composition of the combustive agent and/or fuel.

Abstract: A combustion apparatus is provided which includes an incoming fuel supply line that supplies fuel in a plurality of fuel-supply lines to one or more burners, the burners being associated with a combustion volume. A temperature sensor is located in the apparatus so as to yield temperature information relating to a component part of the apparatus, which is to be prevented from overheating The apparatus also includes a control arrangement, which detects the temperature-sensor output and, depending on that output, varies the fuel supplies to one or more of the burners in such a way as to maintain the temperature of the component part below a maximum value, while keeping the fuel in the incoming fuel supply line substantially constant. The control unit preferably also strives to adjust the operating conditions of the apparatus so that pressure oscillations are kept below a maximum value.

Abstract: Method and device for operating a conveyor for a combustion product, in which, during the conveyance, through the detection and analysis of properties (such as volume flow, mass flow, moisture, temperature, grain size) of the combustion product by means of microwaves, a control of transport parameters (such as transport speed, cooling of the combustion product, supply of combustion product, degree of crushing) is realized. It is herein possible to protect the conveyor thermally and mechanically and, at the same time, to ensure real-time regulation of the composition and quantity of the combustion product for following treatment steps.

Abstract: The invention relates to a heating system and a method for operating said system, comprising a first and a second heating device (1, 2) and a common control unit (3), wherein the first and the second heating device (1, 2) is designed such that it can be operated with the same fluid fuel and that it can be controlled by means of the control unit (3). According to the invention, at least one time-dependent process parameter of the control unit (3) is intended and/or used as a calculation basis for determining fuel consumption values of the first and/or second heating device (1, 2).

Abstract: A process is disclosed for monitoring the formation of deposits of solid particles in a fuel line having a valve. A measure for the deposits of solid particles in the fuel line is determined by determining the degree of opening of the valve passage and the quantity of fuel flowing through the valve, and by comparing them with a previously determined control value which characterizes the deposit-free line. Also disclosed is a device for monitoring the formation of deposits of solid particles in a fuel line having a valve, the device having a measurement system for determining the current fuel flow and a measurement system for determining the current valve position, as well as an evaluation system connected to the measurement systems. Also disclosed is a combustion chamber comprising a device and operated by a process according to the invention, and a gas turbine with said combustion chamber.

Abstract: An assembly for creating a fire display from a liquid fuel comprises a fuel receiving reservoir connected to a burner by a conduit, the conduit providing a flow channel for a liquid fuel from the reservoir to the burner. When a container of liquid fuel is placed in a bottle receiving tray the fuel is dispensed into the reservoir and in turn flows into the burner. Flammable vapors over the liquid fuel in the burner can then be ignited. The arrangement provides a continuous feed of fuel to the burner and allows safe replacement of the fuel container and replenishment of the fuel in the burner while the flame is present.

Abstract: A method and apparatus that applies corrections to the mass flow rate of combustion air into a gas or oil-fired, forced-draft burner, and thus provides for correcting the air-fuel ratio, by directly measuring the combustion air temperature and/or the barometric pressure of the combustion air, and using these measurements to develop a fan speed drive signal that corrects the volume of air inlet to the burner system without the use of the complex and expensive fully metered control systems, or elaborate feedback systems, or systems that require real-time combustion analysis, and the like.

Abstract: A combustion control system, including a first set of sensors for generating sample data including data representing a sequence of detected images of different samples of a fuel made up of solid particles; a fuel analysis module for controlling a processor of a computing device to: (i) determine attributes for one or more predetermined physical characteristics of the particles in each said sample based on the sample data, and (ii) generate an index value for each said sample based on said attributes, said index value representing a level of combustibility of the particles in each said sample; and a combustion control module for controlling a processor of a computing device to adjust one or more parameters for controlling a combustion process based on changes to said index value over time.

Abstract: A gas burner including a burner body having a lower housing, an inlet conduit and a combustion surface element attached to the lower housing. A diffuser/reflector positioned within the body encourages even distribution and mixing of a combustible gas/air mixture. The diffuser/reflector is preferably of a sheet metal construction and includes a plurality of stamped openings with each of these openings having an overhanging guide plate. The combustion surface element includes a plurality of integrally formed rigidizing ribs and is made from a high temperature steel alloy wire cloth. The inlet conduit is secured directly or indirectly to an access door/bulkhead that is used to close off an access opening formed in a water heater wall through which the burner is installed. In one construction, an air scoop shrouds the inlet conduit and at least partially defines a flow path of primary air, substantially isolated from the combustion chamber.

Abstract: A method for burning gas in a burner, including leading the gas through an inner fuel tube and introduction of combustion air through an annular space surrounding the inner fuel tube. This space forms of an outer tube terminated by a conically converging section, wherein the end of the inner fuel tube forms a burner head. The major part of the primary gas is introduced into the upstream end of the burner head, to go into the combustion air that flows past the burner head, whereas a smaller part of a secondary gas is introduced into the free end of the burner head and into the constricted part of the annular channel that surrounds the burner head. The gas flow is accelerated past the burner head due to the reducing cross section and is burned downstream in relation to the burning head.

Abstract: A cooking appliance equipped with at least one regulating valve having a rotary regulator organ. The rotary regulator organ has an actuating shaft a plurality of peripheral openings adapted for regulating a flow of gas through the regulating valve. In a first angular position the rotary regulator organ is adapted to supply a constant flow Qmin of a first type of fuel through a first peripheral opening. In a second angular position, successive to the first angular position, the rotary regulator organ is adapted to supply a constant flow Qmin of a second type of fuel through a second peripheral opening. In one implementation a feature that rotates with the actuating shaft is adapted to engage a feature on the cooking appliance to limit the rotation of the rotary regulator organ to the first angular position.

Abstract: A regulation valve having a valve body with a gas inlet. Housed within the valve body is a rotary regulatory body having a first inlet orifice corresponding to a first minimum flow of a first type of gas and a second inlet orifice corresponding to a second minimum flow of a second type of gas. The first and second inlet orifices are angularly displaced so that when the regulatory body assumes a first angular position within the regulatory body the first inlet orifice faces the gas inlet and so that when the regulatory body assumes a second angular position within the regulatory body the second inlet orifice faces the gas inlet. The regulation valve includes first and second sets of cooperating features that are capable of limiting rotation of the regulatory body to the first and second angular positions, respectively.

Abstract: A method includes the steps of operating a regenerative burner in cycles, including a firing cycle in which fuel and combustion air are discharged from the burner into a process chamber, and a nonfiring cycle in which a quantity of gas is withdrawn from the process chamber through a regenerative bed associated with the burner. The method further includes steps of detecting and responding to a temperature that differs from a predetermined temperature at a location in the process chamber. In a first step of responding to the detected temperature, a flue damper system is operated to vary a flow of gas within the process chamber relative to the location of the detected temperature. A second step of responding to the detected temperature reduces the quantity of gas to be withdrawn from the process chamber through the regenerative bed in a subsequent nonfiring cycle.

Abstract: A gas-fired air conditioning furnace comprises a monolithic intake manifold including an inlet at a first end and a plurality of outlets at a second end opposite the first end. In addition, the furnace comprises a burner assembly including a plurality of burners, each burner is configured to combust an air-fuel mixture at least partially within an interior space of the burner. Further, each burner extends into one of the outlets of the intake manifold.

Abstract: A method controls a modulating gas furnace by monitoring a differential pressure associated with the modulating gas furnace, learning an intermediate value associated with an intermediate capacity between a minimum output capacity of the gas furnace and a maximum output capacity of the gas furnace, learning one of a high value associated with the maximum output capacity and a low value associated with a minimum output capacity, establishing an estimated operating curve using either the intermediate value and the low value or using the intermediate value and the high value, and operating the gas furnace in accordance with the estimated operating curve.

Abstract: A method of combining oxygen and fuel in a burner to produce a flame whereby an outer oxidant flow is discharged through an outer oxidant outlet of the burner; a flow of conveyor-gas propelled particulate solid fuel is discharged with a fuel discharge velocity through a fuel outlet of the burner arranged coaxially with respect to the outer oxidant outlet and spaced radially inwardly therefrom; and a first inner oxidant flow is discharged with an inner oxidant discharge velocity, which differs from the fuel discharge velocity, through an inner oxidant end outlet of the burner arranged coaxially with respect to said fuel outlet and spaced radially inwardly therefrom; and whereby a second inner oxidant flow, having a higher oxygen concentration than the conveyor gas is injected into the fuel-conducting passage and mixed with the fuel flow inside said fuel-conducting passage so as to obtain, upstream of the fuel outlet and upstream of the inner oxidant end outlet, an oxygen-enriched conveyor-gas propelled particu

Abstract: A fuel supply apparatus for a combustor configured to prevent or substantially prevent a flashback from being generated from the combustor. A fuel supply apparatus includes a fuel distribution part having a first opening part and a second opening part, the fuel distribution part configured to alternately discharge a fuel from the first opening part and the second opening part; and a housing having a first channel and a second channel, wherein an intermediate part of the first channel is coupled to and in fluid communication with the first opening part, and an intermediate part of the second channel is coupled to and in fluid communication with the second opening part.

Abstract: A system for operating a combustor includes a nozzle and a fuel passage and diluent passage through the nozzle. A fuel supply is in fluid communication with the fuel inlet and the diluent inlet, and a diluent supply is in fluid communication with the diluent inlet. A method for operating a combustor includes flowing a fuel through a fuel inlet in a nozzle and flowing a diluent through a diluent inlet in the nozzle. The method further includes sensing an operating parameter of the combustor, generating a signal reflective of the operating parameter, and controlling a flow of the fuel to the diluent inlet based on the signal reflective of the operating parameter.

Abstract: A system for operating a combustor includes a nozzle and a fuel passage and air passage through the nozzle. A fuel supply is in fluid communication with the fuel inlet, and an air supply is in fluid communication with the air inlet and the fuel inlet. A method for operating a combustor includes flowing a fuel through a fuel inlet in a nozzle and flowing air through an air inlet in the nozzle. The method further includes sensing an operating parameter of the combustor, generating a signal reflective of the operating parameter, and controlling a flow of at least one of air or diluent to the fuel inlet based on the signal reflective of the operating parameter.

Abstract: A system for operating a combustor includes a nozzle and a fuel passage and diluent passage through the nozzle. A fuel supply is in fluid communication with the fuel inlet, and a diluent supply is in fluid communication with the diluent inlet and the fuel inlet. A method for operating a combustor includes flowing a fuel through a fuel inlet in a nozzle and flowing a diluent through a diluent inlet in the nozzle. The method further includes sensing an operating parameter of the combustor, generating a signal reflective of the operating parameter, and controlling a flow of at least one of air or diluent to the fuel inlet based on the signal reflective of the operating parameter.

Abstract: A radiant heating assembly includes a fuel valve and a blower. A controller is configured to control the fuel valve and the blower according to one of a plurality of algorithms corresponding to one of a plurality of selectable modulation modes. An interface is in communication with the controller. One of the plurality of selectable modulation modes is selectable from the interface. The controller modulates at least one of the fuel valve and the blower according to the one of the plurality of algorithms corresponding to the one of the plurality of selectable modulation modes selected from the interface.

Abstract: In certain embodiments, an apparatus includes a control valve for regulating fuel flow. The apparatus can include a burner and a valve assembly. In some embodiments, the valve assembly includes a housing, which can define a first fuel input for receiving a first fuel from a first fuel source and a second fuel input for receiving a second fuel from a second fuel source. The housing can define a first fuel output for directing fuel toward the control valve, and can define a third fuel input for receiving a portion of either the first fuel or the second fuel from the control valve. The housing can define a first egress flow path and a second egress flow path, each for directing fuel to the burner. In certain embodiments, the apparatus includes a valve body configured to selectively permit fluid communication between the first and second inputs and the output and between the third input and the egress flow paths.

Abstract: The present invention relates to a control method of preventing backflow of exhaust gas into combustion chambers of boilers or water heaters that are not in operation for a multiboiler comprising a plurality of boilers or water heaters connected in line, each of which including a wind pressure sensor measuring wind pressure of air flowing into a combustion chamber and a controller controlling a fan supplying air into the combustion chamber on the basis of the wind pressure measured by the wind pressure sensor. The control method includes measuring wind pressures using the wind pressure sensors in the operating boilers and calculating an average wind pressure, using any controller as a master controller to determine a control amount of wind of the fans of non-operational boilers based on the average wind pressure, and operating the fans of the non-operational boilers on the basis of the control amount of wind.

Abstract: A valve useful in distributing gas received in one inlet to several outlets in a sequence, and burner apparatus including this valve for feeding material in sequence to outlets of a burner thereby forming a non-stationary flame at the burner.

Abstract: The invention concerns a combustion method for industrial furnace comprising an arrangement of two substantially parallel and symmetrical burner assemblies (G, D). Each burner assembly comprises a fuel injector (10<SUB>G</SUB>, 10<SUB>D</SUB>) and three oxidant injectors (1<SUB>G</SUB>, 2<SUB>G</SUB>, 3<SUB>G</SUB>, 1<SUB>D</SUB>, 2<SUB>D</SUB>, 3<SUB>D</SUB>) arranged at increasing distances from the fuel injector. An oxidant supply system cyclically distributes a specific flow of oxidant among some at least of the second and third injectors of the burner assemblies (2<SUB>G</SUB>, 3<SUB>G</SUB>, 2<SUB>D</SUB>, 3<SUB>D</SUB>). The amount of nitrogen monoxide produced upon combustion is thus reduced, while ensuring a good distribution of the heating power in the furnace.

Abstract: A gas cook top includes a plurality of gas burners arranged on a cook top surface to accommodate a variety of cooking vessels. Each burner is associated with a valve for varying the flow of fuel gas from a supply to the burner, so that the heat output of the burner can be varied in use. The cook top includes a controller operationally coupled to an actuator associated with each valve for varying the position of each valve. The controller is configured to receive an input from a user via a user interface and operate the actuator to move a valve to a desired position along a predetermined path, wherein the path may not be the shortest distance between the current position and the desired position of the valve.

Abstract: A system includes a first source containing a liquid fuel, a second source containing a gaseous fuel, and a combustion burner connected to the first and second sources and selectively in fluid communication with the liquid fuel and the gaseous fuel to receive the fuels. The burner is capable of switching between combustion of the liquid fuel and combustion of the gaseous fuel without modification to the burner or the system.

Abstract: A furnace with a push and pull combustion system is disclosed. The furnace may include a cabinet housing a burner box, a gas valve assembly, a premix chamber, a heat exchanger, a blower, an induced-draft blower, and a flue pipe. The gas valve assembly may meter gas into the premix chamber, while the blower may draw air into the premix chamber, wherein air and gas may mix to produce a lean gas/air mixture. The blower may also push the lean gas/air mixture into the burner box. The burner box may ignite the lean gas/air mixture to produce combustion products. A blocked vent safety shutoff switch may be mounted over an opening of the burner box to ensure negative pressure by detecting any leakage of combustion products. The induced-draft blower may pull the combustion products through the heat exchanger, the flue pipe, and out into the atmosphere.

Abstract: A burner having a variable output structure includes a flame-hole plate having a plurality of flame holes located on a surface of the flame-hole plate. The plurality of flame holes are exposed to a combustion chamber. Further, the burner can include a flame hole adjusting unit configured to change an output of the burner by adjusting a size of each of the plurality of flame holes according to a load required in a combustion device.

Abstract: A burner tube to provide combustible materials to a combustor is provided and includes an annular shroud and a center body, having a cavity defined therein, disposed within the annular shroud to form an annular passage, the annular passage being communicable with a combustion zone of the combustor at an aft portion thereof and including a fore portion in which fuel is injected into the annular passage. The center body includes a surface having a passage defined therein through which air is to be supplied to the annular passage from the cavity at a position, which is downstream from the fuel injection and upstream from the combustion zone. Also provided is a contouring of the centerbody.

Abstract: A chemically-modified mixed fuel includes methane gas from at least two methane-production sources and can be utilized in any process that incorporates a Kellogg Primary Reformer. A method for producing the chemically-modified mixed fuel described herein includes providing a first methane-containing gas from a first methane-production source, providing a second methane-containing gas from a second methane-production source and blending the first methane-containing gas with the second methane-containing gas at a suitable pressure to form a chemically-modified mixed fuel. In some cases, at least one additional methane-containing gas can be provided from at least one additional methane-production source and blended with the chemically-modified fuel.

Abstract: A heating apparatus for a heat exchanger system includes a manifold having a plurality of burners, a shutoff valve, a first controller and a second controller. The shutoff valve divides the manifold into a first manifold portion and a second manifold portion. The first controller selectively controls the communication of a fluid within the manifold. The second controller selectively actuates the shutoff valve between a first position and a second position to control a firing rate of the plurality of burners.

Abstract: A method for preventing coagulation in an exhaust pipe of a boiler is provided. The method includes proportionally controlling combustion based on a quantity of supplied fuel with respect to an amount of air supplied to a burner, determining whether to enhance a heating power of a burner, based on a temperature of ambient air introduced into a blower, the temperature of the ambient air being sensed by an air temperature sensor, and enhancing the heating power of the burner to increase a temperature of exhaust gas, when it is determined that the sensed temperature is equal to or lower than a predetermined temperature.

Abstract: A coal nozzle for a burner on a pulverized coal fired furnace which includes an elongated tubular nozzle having an inlet for receiving a flowing stream of coal/air mixture and an outlet for discharging the flowing stream into a combustion zone of a furnace for combustion, and an inlet elbow connected to the inlet of the tubular nozzle. The interior outer surfaces of the elbow include a staircase surface configuration for engaging the incoming flowing stream whereby coal ropes in the stream are broken up for thereby improving flow distribution of the stream.