127results about "Combustion using multiple fuels" patented technology

To provide a burner and an ammonia mixed combustion boiler capable of promoting combustion of ammonia and reducing generation of unburned ammonia.SOLUTION: A burner 10 includes: a first fuel flow passage L1 for supplying first fuel F1 of which combustion speed is higher than that of ammonia; a first air flow passage L2 for supplying first combustion air A1; an ammonia flow passage L3 for supplying ammonia F2; a second air flow passage L4 for supplying second combustion air A2; a first fuel ejection part 15 that ejects the first fuel F1; a first air ejection part 16 that ejects the first combustion air A1; an ammonia ejection part 17 that ejects the ammonia F2; and a second air ejection part 18 that ejects the second combustion air A2. The first fuel ejection part 15 is disposed upstream of the ammonia ejection part 17, and burns at least part of the first fuel F1 in a space surrounded by the ammonia flow passage L3.SELECTED DRAWING: Figure 1

The invention discloses a coupling low-carbon combustion process device and an adjusting method thereof, and relates to the field of coupling low-carbon combustion process devices, the coupling low-carbon combustion process device comprises a fuel supply system, an oxygen-enriched / total-oxygen supply system, an air supply system, a flue gas circulation system, a fuel combustion system and a flue gas treatment system; the fuel supply system is used for providing solid-phase fuel, liquid-phase fuel and gas-phase fuel; the oxygen-enriched / total-oxygen supply system is combined with the air supply system and used for changing the combustion atmosphere in the combustion furnace and achieving fuel oxygen-enriched / total-oxygen combustion. The flue gas treatment system comprises a two-stage heat exchanger, a cooling tower and a dust collector; the fuel combustion system is composed of a combustion furnace, an online flue gas analyzer and a temperature, pressure and flow detection device. According to the invention, the synergistic effect among different processes is realized, so that the defect of single process application of the existing platform is effectively overcome, a new solution is provided for low-carbon, high-efficiency and clean industrial combustion process, and multiple low-carbon combustion processes such as alternative fuel combustion, oxygen-enriched / oxygen-full combustion, flue gas circulation and the like are organically coupled.

Processes and apparatuses for heating process fluid in a furnace. Fuel to the furnace is either hydrocarbons or hydrogen. The fuels may be sent to different furnaces or be sent at different times to the same furnace. Furnaces that are configured to receive both types of fuels may have different exhaust paths. An exhaust path for hydrocarbon fuel flue gas includes a carbon capture process zone.

The present invention provides a fuel atomizing nozzle (1) for handling at least two fuels and an atomizing fluid, the fuel atomizing nozzle (1) comprising a solid body (10) having a mainly cylindrical shape around a longitudinal axis (X) defining a first end (11), a second end (12) and a contour surface (16) extending there between connecting the two ends (11, 12), wherein the first end (11) comprises at least one outlet (17), wherein the fuel atomizing nozzle (1) further comprises a fluid compartment (14) being arranged centrally around the longitudinal axis (X) in the solid body (10), at least a first and a second fuel compartment (15a, 15b) being arranged in a radial plane between the fluid compartment (14) and the contour surface (16), the fuel compartments (15a, 15b) having an annular shape, the at least first and second fuel compartments (15a, 15b) being connected to a pre-filling chamber (35) by at least a first and a second fuel channel (25a, 25b), respectively, at least one mixing chamber (40) being arranged between the fluid compartment (14) and the at least one outlet (17), and a fluid channel (24) connecting the at least one mixing chamber (40) and the fluid compartment (14), wherein the pre-filling chamber (35) has an annular shape, and the pre-filling chamber (35) is connected via a pre-filling channel (45) to the at least one mixing chamber (40).

To provide a control method and a control device for a boiler capable of suppressing an air amount of the entire boiler even when using fuel gas of which calorie variation is large and a theoretical air amount changes.SOLUTION: A control method is for a boiler that simultaneously burns a plurality of fuel gases with calories different from each other. The control method for the boiler includes a control step of controlling an air amount to be supplied to each of the fuel gases on the basis of a measurement value of an oxygen concentration in exhaust gas of the boiler and a set value of a predetermined target oxygen concentration. The control step includes a step of increasing the air amount to be supplied to the fuel gas with low calorie when the measurement value is below the set value and reducing the air amount to be supplied to the fuel gas with high calorie when the measurement value exceeds the set value.SELECTED DRAWING: Figure 2

OBJECT To provide a metal heating furnace that burns ammonia while decreasing nitrogen oxides efficiently and a method of burning ammonia in the metal heating furnace. MEANS OF REALIZING THE OBJECT A metal heating furnace 10 includes a burner nozzle 31, plural injection nozzles 41, 42, 43 for ammonia, and a controlling unit 100. The burner nozzle 31 is provided on a furnace wall 11 and emits flame F, which is used to burn ammonia. The injection nozzles 41, 42, 43 for ammonia are provided on a ceiling wall 13 at intervals in a direction in which the flame F extends, and are used to eject ammonia in a direction perpendicular to the flame F. The controlling unit 100 optimizes an amount of ammonia ejected from each of the injection nozzles 41, 42, 43 for ammonia.

To provide a boiler capable of suppressing a consumption of an inert gas for purging a hydrogen gas, and a method of purging the hydrogen gas.SOLUTION: A boiler that injects a fossil fuel gas supplied from a fossil fuel gas line and a hydrogen gas supplied from a hydrogen gas line into a combustion chamber to burn them is equipped with bypass block valves, and has a fossil fuel gas bypass line for connecting the fossil fuel gas line and the hydrogen gas line. The bypass block valves are set to be a closed state in a normal operation, and are set to be an open state when purging the hydrogen gas remaining in the hydrogen gas line, to send the fossil fuel gas into the hydrogen gas line.SELECTED DRAWING: Figure 1

The invention belongs to the technical field of thermal power generation, and discloses a pulverized coal fired boiler coke powder blending combustion system which comprises a coke powder bin, a bin top dust remover is fixedly installed at the top end of the coke powder bin, a bin top safety valve is fixedly installed at the position, located on the outer side of the bin top dust remover, of the top end of the coke powder bin, and a star-shaped unloader is fixedly installed on the edge of the bottom end of the coke powder bin. A sensor is installed on one side of the star-shaped discharger in an embedded mode, a frequency converter is installed at the position, located at one end of the sensor, of one side of the star-shaped discharger, and the bottom end of the star-shaped discharger is connected with a discharging pipe. Meanwhile, the blending combustion amount can be accurately controlled, the boiler runs stably, the maximum blending combustion amount of an originally designed single boiler is increased to 1-5 t / h from about 1.28 t / h, the phenomenon that ash combustible matter rises due to the large blending combustion amount does not occur in the boiler, the blending combustion efficiency is greatly improved, and meanwhile abrasion of equipment such as a coal mill is reduced.

To provide an operating method for a heating furnace and the heating furnace using ammonia that can suppress discharge of carbon dioxide as combustion fuel of the heating furnace and capable of reducing amounts of nitrogen oxide and unburned ammonia to be discharged to outside of the heating furnace.SOLUTION: This invention relates to an operating method for a heating furnace. The operating method for the heating furnace includes: a first burner heating step of performing burner heating by using first fuel gas containing ammonia and combustion air in which an air ratio to a theoretical air amount of the first fuel gas is 0.9-1.0; a second burner heating step of performing burner heating by using second fuel gas containing ammonia and combustion air in which an air ratio to a theoretical air amount of the second fuel gas is lower than that to the theoretical air amount of the first fuel gas; and an air injection step of injecting air to mixed exhaust gas of exhaust gas through the first burner heating and exhaust gas through the second burner heating.SELECTED DRAWING: Figure 3

The present invention relates to a method for thermally treating a mineral material in the cement, lime, residue and / or raw material industry for processing mineral raw materials, with ammonia being used as the main fuel, and the main fuel providing more than 50% of the thermal energy generated by combustion.

The fuel preheater 10 comprises a first mixer 1, which is provided in a fuel supply line L1 connected to a combustion unit 100 that burns fuel comprising ammonia, wherein the fuel supply line L1 supplies ammonia to the first mixer 1, the first mixer 1 being connected to an oxidizer supply line L2 which supplies an oxidizer, and mixing the ammonia flowing in the fuel supply line L1 with the oxidizer from the oxidizer supply line L2 to produce a mixed gas, and a reactor 2, which is provided downstream of the first mixer 1 in the fuel supply line L1, wherein the reactor 2 comprises a catalyst which promotes a reaction of the ammonia and which causes an exothermic reaction, wherein the catalyst causes the exothermic reaction with at least a portion of the ammonia in the mixed gas supplied by the first mixer 1, and the Mixed gas heated.

Processes for managing combustion of a fuel gas in the presence of an oxidant supplied to a combustion zone, where the fuel gas undergoes an event that includes a pressure decrease and / or an average molecular weight increase, and where the fuel gas is supplied to the combustion zone via a valve. The process can include (I) detecting the event. Upon detecting the event in step (I), the process can also include (II-a) controlling the fuel gas supplied to the combustion zone by limiting an output of the valve to no more than a predetermined threshold output to prevent excessive fuel gas flooding the combustion zone and / or (II-b) controlling the fuel gas supplied to the combustion zone by adjusting the valve to maintain a pressure of the fuel gas after the valve to no higher than a predetermined threshold pressure to prevent excessive fuel gas flooding the combustion zone.

The present invention provides a multi-fuel combustion fuel supply device equipped with a fuel supply system with a bypass fuel supply pipe, which is capable of easily adjusting the fuel flow rate while maintaining the calorific value ratio of each fuel at a set calorific value ratio for each fuel, and a fuel supply method for the multi-fuel combustion fuel supply device. [Solution] The multi-fuel fuel supply device (30) of the embodiment comprises: a hydrogen supply system (40) that supplies hydrogen gas to a combustion device (200), including a main fuel supply pipe (41) with a flow control valve (45) and a bypass fuel supply pipe (42) that has a flow control valve (46) and is connected to the main fuel supply pipe (41) bypassing the flow control valve (45); a city gas supply system (70) that supplies city gas to the combustion device (200), including a main fuel supply pipe (71) with a flow control valve (75) and a bypass fuel supply pipe (72) that has a flow control valve (76) and is connected to the main fuel supply pipe (71) bypassing the flow control valve (75); and a control device (90) for adjusting the flow rates of the hydrogen gas and the city gas.

The utility model discloses a compact biomass blending combustion system, and relates to the technical field of biomass blending combustion. Comprising a biomass discharging room, a discharging hopper, a bin bottom feeding machine, a large-dip-angle belt conveyor, a weighing belt conveyor, an electric three-way flow dividing device and a control system. The discharge hopper is arranged in the discharge room, and the bin bottom feeder is vertically connected to the lower portion of a discharge port of the discharge hopper; the feeding end of the large-dip-angle belt conveyor is connected with a discharging port of the bin bottom feeding machine, and the weighing belt conveyor is horizontally arranged. The electric three-way flow dividing device comprises a main channel and bypass channels, the inlet end of the main channel is connected with the discharging end of the weighing belt conveyor, and outlets of the two bypass channels extend to the positions above the two bearing faces of the fire coal AB belt conveyor respectively and are located on the downstream of a detection point of a weighing device of the fire coal AB belt conveyor. According to the utility model, the requirements of coal-electricity low-carbon transformation on biomass blending combustion capability, land occupation constraint, control precision, environmental protection property and the like are met.

A combustion system includes a combustion chamber for generating energy. The system includes a first inlet for supplying an oxidant into the chamber and a second inlet for supplying a fuel into the chamber. The system also includes a third inlet in fluid communication with the first inlet for supplying oxygen into the chamber. The system further includes a fourth inlet for supplying hydrogen into the chamber. A circulation line is used to deliver a flue gas from the chamber to the first inlet.

The invention relates to particular burners, particularly to non-premixed or partially-premixed fuel burners with flexibility to oxygen enrich the burner. Accordingly, said burners may be used in applications that needs operation of a burner in both air-fuel, and / or oxy-fuel and / or air-oxy-fuel mode depending on furnace operation needs. The invention further relates to furnaces including the burners and methods of operating the burners.

To provide an effective use method of a waste plastic crushed product, when operating a boiler given a situation where a fuel is produced by combining coal and a waste plastic crushed product, the method capable of efficiently combusting in the boiler and efficiently performing various processing (flue gas denitrification processing, dust collection processing, and flue gas desulfurization processing).SOLUTION: The disclosed method includes the steps of: subjecting coal to fine particle processing by a vertical mill (14) to obtain powdered coal; granulating a waste plastic crushed product by a crusher (18) to obtain a crushed product; mixing the powdered coal and the crushed product to obtain a mixed fuel; and generating power to rotate a turbine (40) connected to the boiler by loading the mixed fuel into the boiler (20) and operating the boiler.SELECTED DRAWING: Figure 1

A fuel supply system according to the present invention is a fuel supply system that vaporizes mixed-fuel to be supplied to a power generation system, and includes a condenser that condenses steam transferred from a turbine of the power generation system, a storage tank in which the mixed-fuel is liquefied and stored, a vaporizer that vaporizes the mixed-fuel transferred from the storage tank, and a first line that passes through the condenser and the vaporizer, wherein heat exchange water is transferred via the first line and heated by the condenser, and the vaporizer vaporizes the mixed-fuel with the heat exchange water heated by the condenser, and supplies the mixed-fuel vaporized by the vaporizer to the power generation system.

The invention provides a method for operating a heating furnace and a heating furnace, which can use ammonia capable of suppressing emission of carbon dioxide as a fuel for combustion of the heating furnace and can reduce the amount of nitrogen oxide and unburned ammonia discharged to the outside of the heating furnace. The method for operating a heating furnace includes: a first burner heating step in which a first fuel gas containing ammonia is subjected to burner heating with combustion air having an air ratio of 0.9-1.0 with respect to the theoretical air amount of the first fuel gas; a second burner heating step in which a second fuel gas containing ammonia is subjected to burner heating with combustion air in which the air ratio with respect to the theoretical air amount of the second fuel gas is lower than the air ratio with respect to the theoretical air amount of the first fuel gas; and an air injection step of injecting air into a mixed exhaust gas of the exhaust gas generated by heating of the first burner and the exhaust gas generated by heating of the second burner.

The application provides a grain for end-face combustion of a solid-liquid fuel gas generator, which comprises a body; one end of the body is a conical surface structure, and a group of vanes for improving the combustion rate of the grain are arranged in the body; the body and the vanes are made of the same material; and the body is fully nested with combustion medium. The application has simple and reasonable structure, solves the problem that the burning surface shape is difficult to maintain during the end-face combustion of a paraffin-based grain, and meets the supply demand of large-flow rich fuel gas, and is suitable for promotion and application.

The invention discloses a method for collaboratively treating baking soda desulfurization ash and waste iron oxide desulfurizer. The method comprises the following steps: placing baking soda desulfurization ash in a stirring tank, adding water at a water-ash ratio of (3-5):1, and stirring the mixture into fluidized slurry; uniformly mixing the waste iron oxide desulfurizer and coal at a mass ratio of (1-5):1000, and grinding the mixture with steel balls to obtain a mixed fuel; atomizing the slurry at a fuel delivery port of a pulverized coal boiler, blending the mixture with the mixed fuel, and then feeding the mixture into a furnace for combustion; volatile matter is purified by a terminal gas purification device to generate desulfurization gypsum, and ash is mixed with fly ash and bottom ash. The method reasonably configures the addition amounts of the waste iron oxide desulfurizer and the baking soda desulfurization ash, thereby ensuring that the discharged flue gas meets the ultra-low emission environmental protection requirement, and the ash mixed with the fly ash and bottom ash meets the environmental protection requirement.

The application provides a dual-fuel high-temperature heat source, and belongs to the technical field of heat science. The outside is connected with a low-grade fuel channel and a boiler, and the outside is also connected with an air channel and the boiler through a heat source regenerator; the boiler is also connected with a gas channel and the outside through the heat source regenerator; the outside is also connected with a high-grade fuel channel and a second boiler, and the outside is also connected with an air channel and the second boiler through a second heat source regenerator; the second boiler is also connected with a gas channel and the outside through the second heat source regenerator; the outside is connected with a heated medium channel and the second boiler, and the second boiler is also connected with the outside through a heated medium channel, thereby forming the dual-fuel high-temperature heat source.

To provide a combustor capable of improving economical efficiency and operational work efficiency while sufficiently reducing a discharge amount of ammonia to the outside, when using ammonia as fuel gas.SOLUTION: A combustor comprises a control device S capable of controlling valve openings of a first flow control valve V1 and a second flow control valve V2. A hydrocarbon gas flow pipe L2 is connected to a downstream pipe portion of an ammonia gas flow pipe L1 downstream of an installation position of the first flow control valve V1 in a state of allowing hydrocarbon gas to flow. Before combustion is stopped, the control device S closes the first flow control valve V1 and opens the second flow control valve V2, performing hydrocarbon gas purge control to purge ammonia gas in the downstream pipe portion of the ammonia gas flow pipe L1 with hydrocarbon gas.SELECTED DRAWING: Figure 1

The combustion system includes an ammonia supply source, a cracker that is connected to the ammonia supply source and that decomposes ammonia into hydrogen and nitrogen, a combustor that is connected to the ammonia supply source and the cracker and that combusts ammonia from the ammonia supply source and gas including hydrogen from the cracker, a sensor that detects a combustion abnormality in the combustor, and a controller that is communicatively connected to the sensor and that adjusts an amount of gas from the cracker to the combustor based on a detection result of the sensor.

OBJECT To provide a metal heating furnace that burns ammonia while decreasing nitrogen oxides efficiently and a method of burning ammonia in the metal heating furnace. MEANS OF REALIZING THE OBJECT A metal heating furnace 10 includes a burner nozzle 31, plural injection nozzles 41, 42, 43 for ammonia, and a controlling unit 100. The burner nozzle 31 is provided on a furnace wall 11 and emits flame F, which is used to burn ammonia. The injection nozzles 41, 42, 43 for ammonia are provided on a ceiling wall 13 at intervals in a direction in which the flame F extends, and are used to eject ammonia in a direction perpendicular to the flame F. The controlling unit 100 optimizes an amount of ammonia ejected from each of the injection nozzles 41, 42, 43 for ammonia.

The present disclosure relates to systems and methods that are useful for controlling one or more aspects of a power production plant. More particularly, the disclosure relates to power production plants and methods of carrying out a power production method utilizing different fuel chemistries. Combustion of the different fuel mixtures can be controlled so that a defined set of combustion characteristics remains substantially constant across a range of different fuel chemistries.

A radiant burner (100) is provided with: a burner brick (1); and a nozzle (2) protruding from the burner brick (1) toward the combustion space (S), the nozzle (2) comprising: a first fuel injection hole (25) that injects a first fuel containing ammonia into the combustion space (S); a first fuel flow path (23) in fluid communication with the first fuel injection hole (25); a warm-up space (P) separated from the first fuel injection hole (25) and the first fuel flow path (23) by a wall and adjacent to the first fuel flow path (23) across the wall; and a second fuel injection hole (26) that opens to the warm-up space (P) and injects a second fuel into the warm-up space (P).

To suppress CO2 emission.SOLUTION: The steam supplying system 10 includes a hydrogen boiler 20, a first hydrogen supplying apparatus 31 for supplying a first hydrogen H1, a first pressure reduction valve 55 for adjusting a flow-rate F1 of the first hydrogen H1, a second hydrogen supplying apparatus 32 for supplying a second hydrogen H2, and a second pressure reduction valve 65 for adjusting a flow-rate F2 of the second hydrogen H2, wherein a CO2 emission factor C1 of the first hydrogen H1 is smaller than a emission factor of the second hydrogen. H2 CO2 C2, when the required amount Ft of the hydrogen H of the hydrogen boiler 20 is equal to or less than the maximum supply amount of the first hydrogen H1, the first decompression valve 55 adjusts the flow amount F1 of the first hydrogen H1 according to the required amount Ft. In addition, the second pressure reduction valve 65 adjusts the flow amount H2 of the second hydrogen F2 to 0, and when the required amount Ft exceeds the maximum supply amount, the first pressure reduction valve 55 adjusts the flow amount H1 of the first hydrogen F1 to the maximum supply amount, and the second pressure reduction valve 65 adjusts the flow amount H1 of the second hydrogen H2 according to the shortage of the first hydrogen F2 with respect to the required amount Ft.SELECTED DRAWING: Figure 1

The present invention relates to a combustion system using a carbon-free fuel such as hydrogen or ammonia, and more specifically, relates to an ammonia and hydrogen co-combustion system which improves the reactivity of ammonia and reduces nitrogen oxides in the exhaust gas after combustion.

To provide a power generation method and a power generation facility that suppress generation of carbon dioxide during power generation.SOLUTION: A power generation method includes burning inorganic solid fuel and carbon monoxide and carbon dioxide that function as combustion-supporting gas in a combustion chamber 21 of a boiler device 2.SELECTED DRAWING: Figure 3