5391results about "Indirect carbon-dioxide mitigation" patented technology

The invention discloses an ammonia-coal co-combustion burner which comprises a plasma pulverized coal pre-combustion level module, an ammonia two-level combustion module, a pulverized coal main combustion level module and an air classification secondary air module. Plasma is generated by discharging between electrodes in the plasma pulverized coal pre-combustion stage module, pulverized coal carried by primary air is combusted through a plasma fire core area to generate first pulverized coal flame, and the first pulverized coal flame ignites ammonia fuel on the upper stream of the ammonia two-stage combustion module to generate stable ammonia-rich flame. Combustion products and unburnt reactants are mixed with downstream air in the ammonia two-stage combustion module to generate lean-ammonia flame for heating pulverized coal in the pulverized coal main combustion stage module to generate second pulverized coal flame, and the pulverized coal and ammonia gas are promoted to be fully combusted in the air classification secondary air module through secondary air, so that stable combustion of ammonia-coal mixed fuel is realized; the problems that ammonia coal combustion is unstable, NOx emission is too high and ammonia escapes are effectively solved.

A fuel cavity, an air cavity and a combustion cavity are sequentially and coaxially arranged at intervals in a sealed mode from bottom to top, a plurality of nozzle assemblies are fixedly arranged in the air cavity, and the nozzle assemblies are symmetrically arranged relative to the center of the air cavity to form an annular multi-layer array structure; the nozzle assembly comprises an air flow guide component, a tangential rotational flow component, a fuel pipe and a mixing pipe which are coaxially arranged. Through a combined adjusting mechanism of the air flow guide component and the tangential rotational flow component, different rotational flow degrees of a single nozzle can be realized, so that the nozzle adapts to fuels with different properties; according to different working conditions, different air rotational flow degrees can be set for the nozzle assemblies on different layers in a staggered mode, or different air rotational flow degrees can be set for the multiple nozzle assemblies on the same layer in a staggered mode, so that staged coupling combustion of the multiple nozzle assemblies in a large space is achieved, and the purposes of enhancing combustion stability and improving temperature uniformity are achieved.

A multi-stage micro-decomposition swirl burner with an ammonia-doped fuel, and a low NOx control method are provided. A natural gas central pipe, a primary air pipe and a burner housing are nested from inside to outside in sequence to form a primary air duct and an over-fire air channel which are isolated from each other. Natural gas is ejected from the natural gas central pipe, and swirl vanes are arranged in the primary air duct, such that the primary air can be mixed with the central natural gas in a swirl state, and then a diffusion flame is formed under the action of an ignition device. Therefore, a pilot flame with sustainable combustion is formed at the center of an injection end of the burner.

The present invention discloses a hot-end sealing device for an air preheater that compensates for the expansion difference between a sealing sheet and a backing plate, which at least includes a sealing sheet and a backing plate. The sealing sheet is provided with sealing sheet mounting holes distributed along the length direction, and the backing plate is provided with backing plate mounting holes distributed along the length direction. The linear expansion coefficient of the sealing sheet is different from that of the backing plate. The sealing sheet and the backing plate are relatively fixed by clamping bolts that simultaneously pass through the sealing sheet mounting holes and the backing plate mounting holes. One end close to the rotor central cylinder is the expansion starting end, and the clamping bolts at the expansion starting end are fully tightened and fixed, while the remaining clamping bolts are not fully tightened and fixed, so that the sealing sheet and the backing plate freely expand towards the other end close to the rotor outer edge angle steel after being heated. At least one set of two-dimensional guiding mechanisms is arranged between the sealing sheet and the backing plate downstream of the expansion starting end. The above device maximally compensates for the triangular air leakage area at the hot end of the air preheater, significantly reduces the air leakage rate of the air preheater, has good stability and a long service life.

Combustion systems and associated methods are disclosed herein. In some embodiments, a combustion system comprises a first combustion zone, a second combustion zone downstream of the first combustion zone, and a heat module thermally coupled to the first combustion zone and / or second combustion zone. The first combustion zone is configured to (i) receive and combust preheated air and a first fuel and (ii) generate a first exhaust gas, and the second combustion zone is configured to (i) receive and combust the first exhaust gas and a second fuel and (ii) generate a second exhaust gas. The first exhaust gas can have a first excess air and the second exhaust gas can have a second excess air less than the first excess air. The heat module can comprise a thermionic converter or another heat-to-electricity converter able to generate a power output.

Disclosed is a mixed combustion system fueled with ammonia, hydrogen and natural gas, which comprises a furnace chamber, a combustor, a heat exchanger, a mixer and a storage tank, the combustor and a conical combustion cavity are installed in the furnace chamber, the storage tank is provided with a first branch pipeline through a conveying pipe to be connected with the heat exchanger, the heat exchanger is connected with an inlet of the mixer, and an outlet of the mixer is connected with a fuel inlet of the combustor; and the conveying pipe is provided with a second branch pipeline connected with an ejector port of a first ejector, the first ejector is installed on a flue gas recirculating pipe connected with a furnace chamber flue gas exhaust pipeline, and the other end of the flue gas recirculating pipe is connected with an auxiliary fuel inlet of the combustor.

The utility model discloses a high-efficiency energy-saving ceramic handicraft firing kiln, which comprises a kiln body and has the beneficial effects that a kiln car and a firing frame are arranged, so that the kiln car can be pulled out of the kiln body, the kiln car is supported in an auxiliary manner through a guide roller at the top of a guide support plate, and the kiln car and the firing frame are pulled out, so that the kiln car can be conveniently fired. Ceramic needing to be fired can be conveniently placed on the firing frame, the position of the kiln car in the kiln body is jacked and fixed through the inner jacking block on the inner side of the kiln door, the kiln car and the firing frame are stably placed in the kiln body, the stability of the position during ceramic firing is improved, and through the arrangement of the heat preservation box and the heat exchange copper gas pipe, high-temperature smoke in the heat preservation box is achieved; gas treated by the oxygen enrichment device in the heat exchange copper gas pipe is heated, the temperature of combustion-supporting gas is increased, the combustion-supporting gas is mixed with gas supplied by the gas pipe in the concentration gas box, the mixture is sprayed out through the ventilation box and the combustion nozzle, ignition is conducted through the ignition rod, and ceramic firing is conducted through fuel.

The invention provides a combustion control method and system for an ammonia-coal dual-fuel mixed boiler, and belongs to the field of combustion control of ammonia-coal mixed combustion. The combustion control method for the ammonia-coal dual-fuel mixing boiler comprises the following steps that S1, boiler operation parameters in the ammonia-coal dual-fuel mixing process are generated according to the boiler load and the ammonia mixing proportion requirement in the ammonia-coal dual-fuel mixing process; the boiler operation parameters comprise an ammonia feeding amount set value and a coal feeding amount set value. According to the invention, the fuel quantity, the air quantity and the pollutant discharge in the ammonia-coal dual-fuel blending combustion can be automatically adjusted and controlled, the combustion efficiency is improved, the low pollutant discharge is realized, and the blending combustion automation level is improved.

The invention discloses a combustor suitable for multi-coal combustion by synergistically changing a backflow area through a blade angle and air volume and a combustion method, belongs to the technical field of tangential boiler combustion, and aims to solve the problems that a self-service stable combustion combustor cannot flexibly change rotational flow intensity along with variation of coal quality, resistance is increased due to increase of the blade angle, and combustion efficiency is low. In order to solve the problems that pulverized coal cannot be fully combusted and stable combustion flames are difficult to form due to insufficient air pressure of a secondary air box, an inner secondary air rotational flow assembly and an inner secondary air supplementing system are introduced, so that the air volume of inner secondary air is adaptively changed by adjusting the working angle of blades in an inner secondary air pipeline, and the combustion efficiency of the pulverized coal is improved. Therefore, the rotational flow intensity of internal secondary air is flexibly adjusted according to different coal types, the purpose of stable combustion is achieved, and the device is mainly used for improving the stable combustion effect of the boiler during working.

The invention provides an air pre-heater ash clogging monitoring system and method, and relates to the technical field of air pre-heaters, and the system comprises a real-time monitoring module which is used for obtaining real-time working parameters of an air pre-heater, and judging whether the ash clogging condition exists or not at present; and the ash clogging prediction module is used for performing ash clogging prediction according to the historical working parameters of the air preheater. The permissible fluctuation range of the flue gas pressure difference is updated regularly according to the real-time working parameters of the air preheater, flue gas emission can be more accurately controlled, accidental shutdown of the air preheater caused by improper parameter setting can be reduced, and therefore the stability and safety of operation of the whole device are improved, and the service life of the whole device is prolonged. When the flue gas pressure difference is changed abnormally, ash blocking prediction is carried out, prevention measures are taken before actual occurrence of ash blocking, actual occurrence of ash blocking is avoided, and stable operation of the air preheater is guaranteed.

The invention relates to a self-adaptive power plant combustor and an adjusting system thereof. A combustion chamber shell of the combustor is internally provided with a combustion cavity and wrapped with an air bin, the air bin is connected with the combustion cavity through an inclined air hole, one end is provided with a smoke exhaust pipeline and a fan, the other end is provided with a sealing cover with an igniter and a gas distribution chamber, and the upper end is provided with a pulverized coal distribution bin and a powder spraying hole. The adjusting system comprises a temperature and pressure sensor, a controller and an executing mechanism. The advantages are obvious, the air holes and the fuel gas holes are specially designed, and related parts of the pulverized coal distribution bin enable fuel to be fully mixed and combusted; the adjusting system accurately regulates and controls combustion parameters; the service life of the equipment is prolonged by a heat-insulating layer, high-temperature-resistant and The smoke purification device reduces pollution; and intelligent management is realized through remote monitoring. And the combustion efficiency and stability are effectively improved, and efficient and clean utilization of power energy is assisted.

The invention discloses a turbulent burner for mixed combustion of ammonia and coal. The turbulent burner comprises a first cylinder, a second cylinder and a third cylinder, a pulverized coal airflow channel is formed in an inner cavity of the first cylinder; an ammonia gas channel is formed between the first cylinder and the second cylinder; a secondary air channel is formed between the second cylinder and the third cylinder; an inner cavity of the first cylinder is divided into four sections from front to back, namely a first steady flow section, a divergent section, a second steady flow section and a tapered section in sequence, the first steady flow section and the second steady flow section are cylindrical, the divergent section and the tapered section are circular truncated cone-shaped, and the diameter of the front end of the divergent section is large; the front end of the reducing section is small in diameter; a bluff body with a cylindrical front end and a circular truncated cone rear end is arranged in the first cylinder, one part of the bluff body rear end is located inside and outside the divergent section, and the other part is located in the first steady flow section; rotational flow blades are connected between the inner wall of the first cylinder and the outer wall of the blunt body; a plurality of guide plates are evenly distributed at the front end of the second cylinder in the circumferential direction. The method is suitable for the working condition with the small ammonia mixing proportion, and the transition effect of the coal-fired boiler from pure coal combustion to high-proportion ammonia-doped combustion is mainly achieved.

A recuperator burner (100) comprises a burner base (10) and a combustion chamber tube (30) with a burner nozzle (41), as well as an exhaust gas recirculation device with a combustion air-driven jet pump. The jet pump includes a jet nozzle with a cross-section that decreases in the flow direction and has an annular jet pump gap (26) for drawing in exhaust gases by means of an annular jet. The exhaust gas recirculation device is located upstream of the mixing plane of the combustion gases flowing into the combustion chamber tube (30; 230), between the burner base (10) and the combustion chamber tube (30; 230). It comprises at least one continuous exhaust gas intake opening (34; 234) and / or a circumferential, self-contained arrangement of several exhaust gas intake openings that lead into the interior of the combustion chamber tube (30). Upstream of the combustion chamber tube (30), a recuperator (20) with a heat transfer body (21) is arranged, which has flow channels (29.1, 29.2) designed to guide counter-flowing fluids. The fluids enter and exit the flow channels (29.1, 29.2) in the heat transfer body (21) via inlet and outlet openings (23, 24). One fluid consists of combustion air to be preheated, and the other of exhaust gas.

The invention discloses an intelligent soot blowing control method and system in a multi-coal combustion state, and relates to the technical field of boiler control, and the intelligent soot blowing control method comprises the steps that a digital model of a boiler control system is established, and input and output measuring point positions are configured; collecting inlet and outlet flue gas and working medium parameters of each heating surface of the boiler through a sensor; on the basis of the real-time parameters, operation performance indexes of the boiler are calculated; according to the operation performance indexes, monitoring the dirt state, and calculating the cleaning factor, the heat transfer coefficient and the total heat transfer amount of each heating surface; and based on the monitoring result of the soot state, determining the optimal soot blowing time and soot blowing period by using an intelligent algorithm, and automatically controlling the soot blowing operation of each heating surface. According to the intelligent soot blowing control method in the multi-coal combustion state, the operation efficiency of the boiler is improved, the energy consumption is reduced, the service life of equipment is prolonged, meanwhile, the adaptability and stability of the system to the multi-coal combustion state are enhanced, and the overall performance and economic benefits of the boiler are remarkably optimized.

The invention belongs to the field of flexible peak regulation and carbon reduction of thermal power generating units, and discloses a power station boiler oxygen-enriched hydrogen-ammonia-doped system and a working method thereof.The power station boiler oxygen-enriched hydrogen-ammonia-doped system comprises a boiler, and two combustors on the lower portion of the boiler are micro-hydrogen combustors; a combustion outlet of the micro-hydrogen combustor is connected with a lower hearth of the boiler, the hydrogen main gun is obliquely inserted into the inner side of a pulverized coal air chamber of the micro-hydrogen combustor, the hydrogen ignition gun is located in the middle of the pulverized coal air chamber of the micro-hydrogen combustor, and the hydrogen main gun and the hydrogen ignition gun are both connected with the hydrogen supply system. The boiler is provided with secondary air nozzles above and below each burner, the secondary air nozzle below the lowermost micro-hydrogen burner is arranged as a lower secondary air nozzle, the secondary air nozzle above the lowermost micro-hydrogen burner is arranged as an ammonia-doped secondary air nozzle, and the secondary air nozzle below the lowermost micro-hydrogen burner is arranged as an ammonia-doped secondary air nozzle. The secondary air nozzles above and below the uppermost micro-hydrogen burner are ammonia-doped secondary air nozzles, and ammonia gas inlets of the ammonia-doped secondary air nozzles are connected with an ammonia supply system. The problem of unstable combustion under low load can be solved by combining hydrogen-doped ammonia combustion and air oxygen-enriched combustion supporting.

The invention discloses a boiler air-coal ratio regulation and control optimization method and system, and relates to the technical field of boiler combustion control, and the method comprises the steps: interacting a target boiler, obtaining boiler operation parameters, calculating the actual air-coal ratio of each combustion area, and obtaining the target air-coal ratio distribution according to the boiler load and coal quality parameters; optimizing by taking the minimum deviation between the actual air-coal ratio distribution and the target air-coal ratio distribution as an optimization target, generating an optimal primary air parameter and an optimal secondary air parameter, generating an air-coal ratio regulation and control strategy of each combustion area, and issuing the air-coal ratio regulation and control strategy to a distributed control unit for coordinated regulation, so as to realize balanced combustion of the boiler. The technical problems that in the prior art, the boiler air-coal ratio control effect is poor, and combustion stability and heat efficiency are affected are solved, and the technical effects that the air-coal ratio control effect is remarkably improved, the combustion stability is improved, and the overall heat efficiency of the boiler is improved are achieved.

The burner comprises a burner body, a premixing valve body is arranged on the burner body, two mixing cavities are formed in the premixing valve body, and the two mixing cavities are communicated with the premixing valve body. An in-turn pushing piston assembly used for pushing out gas in the two mixing cavities in turn is arranged between the two mixing cavities, the combustor mixes fuel gas and air through the two premixing cavities, and in the mixing process, the mixing effect is more obvious through rotation of stirring blades and compression of the gas; valves for automatically closing or opening the corresponding cavities are arranged, so that when the corresponding cavities send out the mixed gas, feeding of air and fuel gas is stopped; according to the gas mixing device, the mixing quality is guaranteed, the structure is simple, the two cavities compress and stir air and gas in turn, the mixing effect is improved, meanwhile, continuous output of mixed gas can be guaranteed, the utilization rate of the gas is increased, and waste of the gas is reduced.

The utility model discloses a welded junction cutting device, and particularly relates to a welded junction cutting device for a heat exchange tube of an air pre-heater, which comprises a main shaft, a cutter is connected onto the main shaft, a guide mechanism is arranged at the front end of the cutter, and the guide mechanism is connected onto the main shaft. The tool is used for cutting the air pre-heater heat exchange tube, and a notch is flat, free of burrs and free of polishing; a guide mechanism is arranged in the device, so that the operation difficulty is reduced, and the safety is improved; the device is simple in structure, stable, reliable and convenient to operate, mechanisms are fixed through threads, assembly and disassembly are convenient, and the maintenance difficulty is reduced; the power mechanism is high in adaptability, and most power tools on the market can serve as the power mechanism of the power mechanism.

The invention belongs to the technical field of heating furnaces, and particularly relates to an oxygen-enriched combustion system and method for a coal gas single heat storage type heating furnace. Comprising an oxygen pressure regulating branch, a first heating section oxygen lance oxygen injection branch and a main pipe oxygen enrichment branch, the oxygen pressure regulating branch is provided with a pressure transmitter and a temperature transmitter, an oxygen source is communicated with the pressure transmitter and the temperature transmitter through a pipeline, and oxygen flows into the first heating section oxygen lance oxygen injection branch and the main pipe oxygen enrichment branch after being subjected to pressure regulation through a pressure valve. A flow control valve is arranged on the first heating section oxygen lance oxygen injection branch, oxygen is fed into the heating furnace, and the main pipe oxygen enrichment branch feeds enriched oxygen into the main pipe through an enriched oxygen distributor. Flexible switching of different oxygen enrichment modes of the heating furnace is achieved, the burner in the oxygen lance oxygen injection branch of the first heating section is not reversed, total-oxygen combustion of the burner is achieved, under the oxygen enrichment branch of the main pipe, oxygen is conveyed to the main pipe through the oxygen enrichment distributor through the other branch to be mixed with combustion air, and total-furnace oxygen enrichment combustion is achieved.

The utility model discloses a coupled biomass chemical looping combustion system which comprises an air reactor, a cyclone separator, a return feeder and a fuel reactor, the air reactor is communicated with the return feeder through the cyclone separator, the air reactor is configured to complete an oxidation reaction based on the received oxygen carrier and air, the generated oxidation-state oxygen carrier is conveyed to the cyclone separator under the driving of flue gas, and the corresponding oxidation-state oxygen carrier is conveyed to the return feeder through the cyclone separator; the return feeder is respectively communicated with the air reactor and the fuel reactor through a material conveying pipe, the input oxidation-state oxygen carrier is input into the air reactor and / or the fuel reactor by the return feeder, and the fuel reactor completes an oxidation-reduction reaction based on the received oxidation-state oxygen carrier and biomass fuel; the fuel reactor is used for inputting the reduced oxygen carrier into the air reactor through a return pipe; and the exhaust port of the fuel reactor is provided with a carbon dioxide trapping device so as to complete trapping of discharged carbon dioxide.

Conduction oil is adopted as a heat-carrying medium of a boiler tail flue gas heat recoverer and an external air pre-heater, flue gas low-temperature corrosion is effectively avoided, meanwhile, efficient recycling of waste heat of flue gas of the steam boiler is achieved, and the steam boiler is compact and convenient to install and arrange. The composite heat-carrying type steam boiler is characterized in that the steam boiler adopting water as a heat-carrying medium and the heat-conducting oil boiler adopting heat-conducting oil as a heat-carrying medium are combined, and the composite heat-carrying type steam boiler has a good application prospect.

The invention relates to the technical field of energy conservation and environmental protection, and discloses a biomass oxygen-enriched combustion optimization and pollutant intelligent control system and method.The biomass oxygen-enriched combustion optimization and pollutant intelligent control system comprises a boiler temperature and pressure prediction system, a fuel prediction regulation and control system, a primary and secondary air prediction regulation and control system, a flue gas amount prediction system, a flue gas recirculation regulation and control system and a desulfurization and denitrification intelligent control system; the fuel prediction regulation and control system comprises a fuel identification module, a fuel heat value prediction module and a fuel demand prediction module; the primary and secondary air predictive regulation and control system comprises a primary air calculation module and a secondary air calculation module; the flue gas quantity prediction system comprises an induced draft fan control module and a flue gas prediction module; the flue gas recirculation regulation and control system comprises a recirculation quantity prediction module and a supplement quantity prediction module; the desulfurization and denitrification intelligent control system comprises a pollutant prediction module, a desulfurization agent prediction module and a denitrification agent prediction module. According to the invention, dynamic optimization and accurate control of the biomass boiler under the oxygen-enriched combustion condition can be realized.

The invention discloses an air pre-heater cold end multi-fault diagnosis method and device based on a panorama and a dynamic intelligent model, and relates to the technical field of thermal power plant auxiliary engine fault diagnosis, and the method comprises the steps: constructing a panorama monitoring image of an air pre-heater rotor, and dividing the panorama monitoring image into a plurality of independent monitoring regions; extracting color channel information of each monitoring area, and dynamically updating a threshold range of each color channel based on a multi-trigger condition; obtaining morphological edge contour features and color channel deviation features, and jointly inputting the morphological edge contour features and the color channel deviation features into a pre-trained multi-fault classification model; the fault type recognition result, the confidence coefficient and the preset fault type weight are fused, the comprehensive degradation index of each monitoring area is calculated, a three-dimensional diagnosis result is output in combination with the spatial position information of the monitoring areas, and accurate positioning diagnosis, degradation trend quantification and multi-fault intelligent distinguishing of the cold end area of the air preheater are achieved. The method is suitable for full-life-cycle online monitoring and maintenance decision making of the rotary air pre-heater.

The utility model discloses a flame-catalysis integrated combustor, which solves the problem that catalytic combustion and flame combustion are not integrated in the prior art, and has the beneficial effects of realizing integrated combustion and improving combustion efficiency, and the specific scheme is as follows: the flame-catalysis integrated combustor comprises a shell, one side of the shell is provided with an air inlet, and the other side of the shell is provided with an air outlet; a fuel-air mixer, a flame tube and a catalytic component are sequentially arranged in the shell from one side of the air inlet to the other side of the shell, the fuel-air mixer comprises a plurality of fuel distribution chambers which are sequentially arranged in a nested mode, and a gas circulation channel is formed between every two adjacent fuel distribution chambers; the fuel distribution chambers are provided with fuel spray holes facing the gas circulation channel, the outlet end of the fuel-air mixer is inserted into the flame tube, the flame tube comprises a shell, the shell and the shell are arranged at an interval, and the catalytic component is fixed to the end, away from the fuel-air mixer, of the shell of the flame tube.

The invention discloses a large combustor for a rotary kiln, which belongs to the technical field of industrial combustion and comprises a furnace tube, an air inlet tube is arranged in the furnace tube, an air inlet tube is communicated with the furnace tube, an air supply tube is sleeved on the outer side of the air inlet tube, and a gap is reserved between the air supply tube and the air inlet tube. Air introduced from the air inlet pipe passes through a gap between the air supply pipe and the air inlet pipe, enters the air supply pipe and is premixed with the fuel gas; a flow guide pipe is arranged at the end of the air supply pipe and provided with an igniter. The combustor is used for solving the problem of low combustion efficiency caused by poor mixing efficiency due to an overlong combustor.

The present invention discloses an intelligent coal grinding and pulverizing system for a thermal power plant, which comprises a coal aperture optimization module for a coal mill feed port, a coal mill air volume adjustment module and a coal mill outlet air-powder mixture temperature control module; the coal mill feed port coal aperture optimization module is used for optimizing the aperture of coal blocks at the feed port of the coal mill to ensure that the coal blocks obtained after entering the coal mill are of the optimal grinding block size; the coal mill air volume adjustment module is used for controlling the primary air flow of the coal mill according to the coal aperture size required for discharge from the coal mill; the coal mill outlet air-powder mixture temperature control module utilizes boiler unit and pulverizing system analysis to control the temperature at the coal mill outlet for coals with different volatile contents; the present invention improves the unit's rapid load-carrying capacity, the quality of coordinated parameter control and the economy of the unit's operation through intelligent control of the wind speed, wind pressure and air outlet temperature of the coal mill.

The invention discloses a low-calorific-value associated gas ultralow-nitrogen flameless combustion system, which relates to the technical field of combustion control and comprises a gas acquisition module, a premixing control module, a low-calorific-value gas pre-mixing module, a low-calorific-value gas pre-mixing module and a low-calorific-value gas pre-mixing module, multivariable cooperative control is adopted to adjust the mixing proportion of the low-heating-value gas with the stable pressure and the air, and premixed gas with the stable flow is obtained; according to the ultralow-nitrogen flameless combustion system for the low-heating-value associated gas, the combustion process is adjusted through a recirculation channel and dynamic power distribution, combustion state data are collected through a flame probe and a temperature sensor, airflow distribution of the porous ceramic combustor is adjusted according to the data, and finally stable combustion output is achieved. The method can effectively improve the combustion efficiency and stability of the low-heating-value gas and reduce emission, and is suitable for efficient and clean utilization of the low-heating-value gas such as industrial waste gas.

The invention relates to a boiler gas mixing and blowing device which comprises a blower, a blowing pipe, a filter screen, a gas delivery pipe, a mixing chamber and a combustion chamber which are connected in sequence. An outlet of the fuel gas supply pipe is connected with the gas conveying pipe; a brush further abuts against the filter screen; the filter screen rotates through the motor under the action of the transmission assembly, so that the position, connected with the air conveying pipe and the air supply pipe, of the filter screen is changed, and the filter screen moves relative to the brush. An axially-arranged moving plate is installed in the gas conveying pipe, one side of the moving plate vertically extends out of an adjusting plate, the adjusting plate is arranged at an outlet of the fuel gas conveying pipe, and the communicating area of the fuel gas conveying pipe and the gas conveying pipe is adjusted through movement of the adjusting plate; when the output air pressure of the air feeder is increased, the farther the moving distance of the adjusting plate is, the larger the communication area of the fuel air feeding pipe and the air conveying pipe is, and the larger the flow of fuel gas entering the air conveying pipe is. Therefore, the flow of the fuel gas is automatically adjusted along with the flow change of the air flow.

The invention relates to a heating furnace temperature coupling type control system and method based on grid temperature measurement, and belongs to the field of industrial heating furnaces. The heating furnace comprises a heating furnace body, a grid temperature measurement system, a coupling type control system and a furnace temperature control method. The heating furnace body is divided into different areas, and the grid temperature measuring system is composed of a plurality of high-temperature gas sensors and used for measuring the flue gas temperature of the different areas in the furnace. The coupling type control system comprises a pulse type combustion control system and a section adjusting type combustion control system, operation of the combustor can be adjusted in real time according to the difference between the temperature in the furnace and the set temperature, and therefore accurate control over the temperature in the furnace is achieved. According to the control method, different control strategies are adopted according to furnace blanks in different temperature ranges. By means of the method, efficient and accurate control over the temperature in the heating furnace can be achieved, meanwhile, energy consumption is optimized, and heating quality is improved.

A method for combusting ammonia provided in a combustion feed (1) using a combustion arrangement (100) comprising a combustion section (110), a flue gas section (120), and a plurality of burners (111, 112) arranged in the combustion section (110) is provided, wherein the plurality of burners (111, 112) are operated using the combustion feed and oxygen delivered to the plurality of burners (111, 112), and wherein a flue gas (2) formed in the combustion section (110) is passed through the flue gas section (120). Further oxygen is delivered to the combustion section (110) via a plurality of gas injectors (114-117) arranged in the combustion section (110) separately from and in a distance to each of the plurality of burners (111, 112). A corresponding combustion arrangement (100) is also provided.