167results 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

A device for decomposing ammonia into a nitrogen-hydrogen mixture. The device comprising a cylindrical combustion chamber, a device for supplying air-ammonia mixture, at least one main channel for its supply, a tangential swirler, a spark plug installed in the combustion chamber, and a channel for supplying auxiliary fuel with increased flammability. A cylindrical body is introduced, inside of which a cylindrical combustion chamber is located coaxially with the formation between them, the entrance of the main channel and the tangential swirler, an additional annular channel for supplying and heating the air-ammonia mixture, wherein the cylindrical side surfaces of the body and the combustion chamber have at least one through hole for installation of the spark plug, a flame sensor, a device for secondary air supply and a flame stabilizer are introduced, wherein the combustion chamber is a cooling chamber, at the outlet of which a catalytic unit is installed.

Combustion process, comprising: a) a production step of a binary fuel gas consisting of hydrogen and at least of between 5 and 50 vol % of nitrogen, preferably between 15 and 35 vol % nitrogen, and b) a combustion step using as only fuel gas the binary fuel gas at a combustion chamber able to receive as fuel gas the binary fuel gas, wherein the combustion chamber is selected from the group of furnaces and fired process heaters.

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.

To provide a combustion device that can enhance combustibility of low-grade fuel and can be attached to a furnace wall relatively easily.SOLUTION: A combustion device 1 has: a main fuel feed pipe 2 for feeding main fuel MF; a main fuel injection nozzle 3 for injecting the main fuel MF; an air feed pipe 4 for feeding primary combustion air A1; a primary combustion pipe 5 for primarily combusting mixed gas MG of the main fuel MF and the primary combustion air A1; and an auxiliary burner 6. The auxiliary burner 6 comprises: an auxiliary fuel feed pipe 61 for feeding auxiliary fuel SF; and an auxiliary fuel injection nozzle 62 for injecting the auxiliary fuel SF. In the combustion device 1, the auxiliary fuel feed pipe 61 of the auxiliary burner 6 is provided inside the main fuel feed pipe 2 and the main fuel injection nozzle 3. The auxiliary fuel injection nozzle 62 of the auxiliary burner 6 is provided projectingly toward the front part of the main fuel injection nozzle 3 from a front end of the main fuel injection nozzle 3.SELECTED DRAWING: Figure 1

Processes and apparatuses for heating a process fluid with a heater having a burner. Fuel is passed to the burner and combusts to product heat. An inert gas stream is provided to the burner, either upstream or downstream or both, of the burner. The flow of the inert gas stream is controlled based on a composition of the fuel, with more inert gas being passed downstream of the burner to when the amount of hydrogen in the fuel is increased.

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).

An eFuels plant and process for producing synthetic hydrocarbons using renewable energy are disclosed. The eFuels plant comprises a hydrocarbon synthesis (HS) system and a renewable feed and carbon / energy recovery (RFCER) system. The RFCER comprises an oxygen-fired heater to provide operational flexibility and efficiency. The oxygen fired heater comprises: a) one or more burners, suitable for accepting feeds comprising a hydrocarbon stream, an oxygen stream, and a diluent gas stream and producing combustion products comprising heat, carbon dioxide, and water; b) a radiant section, comprising a firebox and a radiant coil within the firebox, wherein the firebox is suitable for accepting the combustion products, and the radiant coil absorbs a first portion of the heat to produce first cooled combustion products; c) a convection section, comprising a convection coil and a convection inter-tube space defined by the outer surface of the convection coil, wherein the convection inter-tube space is suitable for accepting the first cooled combustion products to produce second cooled combustion products; and d) a carbon dioxide recovery section, comprising a condensing coil and a condensing inter-tube space defined by the outer surface of the condensing coil, wherein the condensing inter-tube space is suitable for accepting the second cooled combustion products to produce third cooled products comprising a non-condensables stream, comprising carbon dioxide, and a water stream.

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.

Disclosed is a combustion method in a furnace, e.g. a glass furnace. A fuel mixture, optionally comprising recirculated flue gas, comprises fuel components that undergo an endothermic reforming reaction while being indirectly heated utilizing the heat of the furnace flue gas in order to improve heat recovery efficiency. The heat exchanger may be of the regenerator type.

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 utility model discloses a multi-fuel kiln, which relates to the technical field of kilns and comprises a kiln body (1) and a mounting frame (2), the kiln body (1) is arranged on the mounting frame (2), a working bin (3) is arranged on the kiln body (1), a firewood burning port (7) and an ash removal port (8) are sequentially arranged on the side face of the kiln body (1) from top to bottom, and the firewood burning port (7) is communicated with the ash removal port (8). The firewood burning opening (7) is formed under the working bin (3), a plurality of fuel inlets (11) are formed in the back face of the kiln body (1), the fuel inlets (11) are communicated with the interior of the firewood burning opening (7), and a sealing block (12) matched with the firewood burning opening (7) is arranged on the firewood burning opening (7). The temperature rise is slow, and the fuel consumption is high.

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.

A radiant burner 100 comprises a burner tile 1 and a nozzle 2 protruding from the burner tile 1 toward a combustion space S. The nozzle 2 comprises: a first fuel injection hole 25 through which a first fuel containing ammonia is injected into the combustion space S; a first fuel flow path 23 in fluid communication with the first fuel injection hole 25; a preheating 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 with the wall therebetween; and a second fuel injection hole 26 that opens into the preheating space P and injects a second fuel into the preheating space P.