2555results about "Indirect carbon-dioxide mitigation" patented technology

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.

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 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 utility model provides a high-enthalpy pure air heating device which is used for solving the technical problem that according to an existing heating mode, the attributes of incoming flow air and real air are different. The heating device comprises a gas inlet unit, a heating unit and a gas collecting unit, the air inlet unit is connected with the heating unit; the heating unit comprises a shell, and a heat transfer chamber and a combustion chamber which are arranged in the shell; the heat transfer chamber is coaxially installed in the shell, the radial section of the heat transfer chamber is of a circular ring structure, and the combustion chamber is axially installed in the center of the circular ring structure. A plurality of radial channels and axial channels which are mutually independent are arranged in the heat transfer chamber; the two ends of each radial channel communicate with the combustion chamber and the residual gas outlet correspondingly, and the radial channels are used for conveying high-temperature gas. The two ends of each axial channel communicate with the air inlet and the air outlet correspondingly, and the axial channels are used for conveying incoming flow air. And the gas collection unit is used for collecting the high-enthalpy air and transmitting the high-enthalpy air to external test equipment. The device is high in heating speed, and pure high-enthalpy air can be obtained.

The invention provides a combustion-supporting air preheating device for an annealing furnace, and relates to the technical field of air preheating combustion-supporting equipment, the combustion-supporting air preheating device comprises a preheating box, and a plurality of rows of preheating pipes are fixedly connected in the preheating box; a threaded propeller shaft is rotationally arranged in the preheating box and close to the leeward side of the preheating pipe, and a longitudinal guide shaft is welded in parallel in the preheating box and close to the threaded propeller shaft; the preheating pipe is sleeved with a retaining ring in a sliding mode, a gear ring is rotationally installed on the retaining ring, a retaining ring is welded to the gear ring, a small annular steel wire brush and a large annular steel wire brush are fixed to the inner circumference and the outer circumference of the retaining ring respectively, and brush wires on the annular steel wire brush on the inner side are evenly distributed on the inner circumference of a supporting ring of the retaining ring. Brush wires on the annular steel wire brush on the outer side are uniformly distributed on the periphery of a supporting ring of the annular steel wire brush; according to the preheating device, the trouble that the preheating device needs to be greatly disassembled to expose the preheating pipe, and then the preheating pipe can be cleaned can be omitted, and operation and use are easy, convenient and efficient.

The invention provides a porous medium combustor for stable combustion of ultralow-calorific-value gas, belongs to the technical field of combustors, and solves the problems that an existing combustor is low in heat recycling efficiency and air is not fully preheated before entering a combustion area. The combustor comprises a shell, a gradually-shrunk porous medium layer, a stable-combustion porous medium layer, a gradually-expanded porous medium layer, a premixing chamber, a fuel channel and an oxidizing agent channel, and the gradually-shrunk porous medium layer, the stable-combustion porous medium layer and the gradually-expanded porous medium layer are all located in the shell and are sequentially arranged from top to bottom; the premixing chamber is communicated with the lower part of the divergent porous medium layer; an outlet of the fuel channel is communicated with the premixing chamber; the oxidant channel surrounds the stable combustion porous medium layer and the divergent porous medium layer and is spirally arranged on the shell, an inlet of the oxidant channel is located above the stable combustion porous medium layer, and an outlet of the oxidant channel is communicated with the premixing chamber. The combustible limit of the low-heating-value fuel gas can be widened, stable and efficient utilization of the ultralow-heating-value fuel gas is achieved, and the heat recycling efficiency is improved.

The invention relates to a chemical looping combustion variable load system based on flue gas recirculation and a control method. The system comprises a chemical looping combustion system and a flue gas recirculation system (7), the chemical looping combustion system comprises an air reactor (1), a fuel reactor (2), an AR cyclone separator (3), an FR cyclone separator (4), an AR material return device (5), an FR material return device (6), an air supply system (8) and a fuel supply system (9). By controlling the flow and temperature of recirculated flue gas of the flue gas recirculating system and cooperatively controlling the opening degree of the conical valve and the circulating flux of the system, the load of the chemical looping combustion system is flexibly adjusted, the energy consumption is reduced, the efficiency is improved, and the operation cost is reduced; and the rest high-temperature flue gas enters a flue gas treatment system to be treated, high-purity CO2 gas is obtained after heat exchange, condensation and purification, and finally efficient combustion of fuel and low-energy-consumption carbon capture are achieved.

The utility model discloses a boiler air pre-heater with a cleaning function, which comprises an air pre-heater body, the air pre-heater body comprises a tube box, a smoke tube bundle and a scraper device are arranged in a heat exchange cavity of the tube box, and the scraper device is used for scraping dirt on the outer side wall of each smoke tube in the smoke tube bundle; a smoke inlet pipe and a smoke exhaust pipe are arranged at the two ends of the pipe box respectively, the axis of a smoke inlet of the smoke inlet pipe and the axis of a smoke outlet are arranged in an angle mode, an extending pipe extending in the axial direction is arranged on the side, opposite to the smoke outlet, of the smoke inlet pipe and communicated with the smoke inlet pipe, and a scraping and washing device is arranged in the extending pipe. The scraping and washing device is used for scraping dirt on the inner side wall of each smoke tube in the smoke tube bundle; a valve control assembly is arranged at the joint of the extension pipe and the smoke inlet pipe. According to the smoke tube bundle cleaning device, dirt accumulated on the inner side wall and the outer side wall of each smoke tube in the smoke tube bundle is scraped away in a scraping and washing mode under the condition that disassembly is not needed, and therefore cleaning of the smoke tube bundle is achieved, heat exchange efficiency is improved, cost is reduced, and the service life is greatly prolonged.

An ultra-low load combustion device adapted to tangentially fired boilers, which relates to the technical field of combustion boilers, specifically an ultra-low load combustion device adapted to tangentially fired boilers. The present invention protects the ultra-low load combustion device: adding a layer of low-capacity pulverized coal burners above the original top-layer primary air burners, and adding a layer of secondary air nozzles above the low-capacity pulverized coal burners; adding a small-capacity pulverized coal feeding device, and the small-capacity pulverized coal feeding device is connected to the low-capacity pulverized coal burners - and other 5 kinds of tangentially fired boiler retrofit structures. The ultra-low load combustion device of the present invention can achieve long-term stable operation of the boiler at 15% of the rated load and below without any auxiliary combustion aids such as oil, gas, plasma, and oxygen enrichment.

The secondary combustion type burner for the baking ladle comprises a smoke column, a baffle, a burner nozzle and the baking ladle, the baffle is in separable airtight connection with the opening side of the baking ladle, and the smoke column and the burner nozzle are arranged on the baffle; the flue gas column comprises a flue gas column main body which is inserted into the baking ladle inner cavity and is coaxial with the baking ladle inner cavity, a flue is arranged in the center of the flue gas column main body, and the flue penetrates through the baffle to enable the baking ladle inner cavity to be communicated with the outside; a preheating gas channel is arranged in the side wall of the flue gas column; the burner comprises a burner body connected with the baffle, and the burner body comprises a combustion chamber and an air channel. One end, far away from the baking ladle, of the combustion chamber is provided with an oxyhydrogen channel and a gas channel, and the other end is a flue gas port inserted into an inner cavity of the baking ladle; the air channel is arranged outside the combustion chamber, and one end of the air channel communicates with the hot air pipe. According to the combustor, a secondary combustion mode is adopted, good temperature uniformity is kept while the combustion temperature is increased, smoke is fully utilized for preheating, the temperature rising speed is increased, and energy consumption is reduced.

The all-oxygen combustion device comprises a combustor, one end of the combustor is fixedly connected with the fire spraying opening, the fire spraying opening is sleeved with an outer sleeve, one end of the outer sleeve is fixedly connected with a connecting plate, a shifting plate is rotationally connected into the connecting plate, and the shifting plate is of an annular structure; the end, away from the outer sleeve, of the connecting plate is detachably connected with a front cover plate, flashboards are evenly and rotationally connected into the front cover plate, communicating openings are formed in the middle of the connecting plate and the middle of the front cover plate in a penetrating mode, and the caliber of the communicating openings is the same as that of the fire spraying opening. The rotating gear drives the shifting plate to rotate synchronously, the flashboards can be driven to rotate along the fixing column along with rotation of the shifting plate, and therefore the stacked flashboards are gradually unfolded and distributed in the communication opening, the caliber of the communication opening is adjusted, and the size of sprayed flame is adjusted.

The invention discloses an air preheating biomass boiler, belongs to the technical field of boilers, and aims to solve the problems of low combustion efficiency, insufficient flue gas waste heat utilization and particulate matter emission of a traditional biomass boiler. Function optimization is achieved through a main body structure composed of a furnace body, a charging barrel and a rotating pipe, a double-spiral-disc heat exchange assembly is arranged in the charging barrel, biomass fuel is preheated through boiler exhaust smoke waste heat, meanwhile, smoke is discharged through exhaust holes after being distributed through spiral disc gas storage cavities, and unburned particles are filtered by a biomass layer and carried to a hearth to be subjected to secondary combustion; an air inlet cavity is formed in the rotating pipe, and air is preheated through the fixed pipe and the first connecting pipe and then input into the hearth. The exhaust assembly adopts a sliding rod and sealing block matched structure, and a convex block mechanism driven by a rotating pipe drives the sealing block to periodically move, so that gas in the charging barrel is intermittently exhausted through a double-layer filter screen. According to the boiler, the heat efficiency is improved through a smoke-air two-way preheating and particulate matter secondary combustion mechanism, and the biomass preheating, air heating and emission treatment process is optimized.

The invention discloses an integrated pulverized coal burner. A burner head comprises a cooling water jacket, a cooling water partition plate, a fuel gas nozzle, an ignition oxygen nozzle and a pulverized coal nozzle. The burner body comprises a cooling water outer pipe, a cooling water partition pipe, a cooling water inner pipe, a pulverized coal sleeve, an ignition oxygen sleeve, a fuel gas sleeve, an ignition gun mounting pipe and a flame detection pipe; a fuel gas channel is formed between the ignition gun mounting pipe and the fuel gas sleeve, an ignition oxygen channel is formed between the fuel gas sleeve and the ignition oxygen sleeve, a pulverized coal channel is formed between the ignition oxygen sleeve and the pulverized coal sleeve, and a process oxygen channel is formed between the pulverized coal sleeve and the cooling water inner pipe. A cooling water outlet cavity is formed between the cooling water outer pipe and the cooling water partition pipe, and a cooling water inlet cavity is formed between the cooling water inner pipe and the cooling water partition pipe. Various key functions such as flame detection, an ignition gun, start-up fuel gas, start-up oxygen, process pulverized coal and process oxygen are integrated into single equipment, and the device has the advantages that the cost is saved, and the efficiency is improved.

The invention belongs to the field of energy conservation and emission reduction of coal-fired boilers, and particularly relates to an online real-time visual monitoring system and method for blockage of an air pre-heater, the system comprises an industrial personal computer, a PLC, an industrial camera, a shield, a light supplementing lamp and a cross rod, the cross rod is installed at the cold end of a secondary air bin of the air pre-heater, and the industrial camera, the light supplementing lamp and the shield are all installed on the cross rod. The industrial camera is located in the shield, the light supplementing lamp is located beside the shield, the PLC is in signal connection with the industrial camera and the light supplementing lamp, along with rotation of the rotor, the industrial camera shoots images of all positions of the rotor of the air pre-heater and transmits collected image information of a cold end to the industrial personal computer, the industrial personal computer preprocesses and recognizes the images, and the air pre-heater is started. And the acquired image is processed and analyzed to obtain the blockage condition of the air pre-heater. The cost of main equipment of the system is low. Compared with an overall pressure difference monitoring method, visual monitoring is more visual; compared with a visual monitoring system based on an infrared image, the system is less interfered by the environment, and the system is more stable and reliable.

The utility model discloses a heat exchange plate, belongs to the field of air preheaters, solves the problem that better heat exchange efficiency cannot be obtained when a plate sheet with higher hardness is used in the prior art, and mainly adopts the technical scheme that the heat exchange plate is formed by welding two thin plates which are arranged front and back through a plurality of linear welding parts, the non-welded parts on the two thin plates are far away from each other to form an air cavity for flowing air, the left side of the air cavity is an air inlet side, the right side of the air cavity is an air outlet side, and the linear welding part is in an up-and-down fluctuating wave shape. The heat exchange plate is mainly used for improving the heat exchange efficiency while ensuring the strength of the heat exchange plate.

The invention belongs to the field of heat-engine plant boiler flue gas waste heat recycling, and discloses a boiler waste heat recycling system which comprises an air preheater and a boiler, and a flue gas outlet of the boiler is communicated with a flue gas channel inlet of the air preheater through a pipeline; an outlet of an air channel of the air preheater communicates with a combustion-supporting air inlet of the boiler through a pipeline, and an inlet of the air channel is used for introducing air to be heated. The air preheater further comprises a preheating unit, the preheating unit comprises a compartment, and the compartment is arranged on the air side of the air preheater and located between the smoke channel and the air channel. The air inlet end and the air outlet end of the compartment are communicated through a circulating pipeline; the circulating fan is arranged on the circulating pipeline and is used for driving the gas in the compartment to circulate; according to the scheme, by means of the buffer area formed by the compartments and the circulating fan, the temperature shock amplitude of the heat accumulator in the alternate heat absorption and heat release process is reduced, and deformation of the heat accumulator caused by too large local thermal stress is relieved; the problem that the heat accumulator is heated unevenly is solved.

The present invention relates to the technical field of SNCR denitration equipment, and particularly relates to a reverse reciprocating waste incineration boiler air distribution collaborative SNCR spray gun arrangement device. The device includes a furnace chamber, a flue arranged in the furnace chamber for flue gas to flow through, a grate arranged inside the furnace chamber and at the bottom of the furnace chamber, an ash hopper is arranged below the grate, a primary air supply system is arranged below the ash hopper, a secondary air supply system is arranged above the grate, and further includes an SNCR spray gun assembly arranged inside the flue. The SNCR spray gun assembly includes a spray gun main pipe and multiple layers of spray gun layers arranged downward in sequence on the spray gun main pipe. A position control unit for controlling the up and down movement of the SNCR spray gun assembly is arranged at the top of the furnace chamber, and a detection unit for detecting the environment of the SNCR spray gun assembly and controlling the opening and closing of the position control unit is arranged in the middle of the flue. The device is provided with a spray gun assembly that can move up and down in the flue, which can help the flue gas and the reducing agent solution to be mixed in all directions, improve the denitration efficiency of the flue gas, and achieve a better flue gas reduction treatment effect.

The utility model discloses an energy-gathering plate pot rack and a gas cooker, and belongs to the technical field of kitchen appliances. The energy-gathering disc pot rack comprises an energy-gathering disc body, a center through hole used for avoiding a burner is formed in the energy-gathering disc body, the inner diameter of the center through hole is larger than the outer diameter of the burner, so that a secondary air supplementing inlet can be formed between the energy-gathering disc body and the burner in the assembled state, and a secondary air preheating cavity distributed around the center through hole is formed in the energy-gathering disc body; the secondary air preheating cavity is communicated with the secondary air supplementing inlet, a secondary air inlet communicated with the secondary air preheating cavity is formed in the energy gathering disc body, and the upper surface of the energy gathering disc body is made of glass with the melting point higher than the combustion temperature of the gas cooker. And the fully preheated secondary air participates in combustion, so that the temperature field of the high-temperature flue gas can be effectively enhanced, the heat exchange effect with the bottom of the boiler is enhanced, and the combustion heat efficiency is improved.

The present invention provides a tangentially fired pulverized coal boiler system with ammonia co-firing and an ammonia co-combustion method, which relates to the technical field of fuel combustion and includes an ammonia / coal powder combustion section and an ammonia burnout zone arranged on the boiler; the ammonia / coal powder combustion section includes a coal powder combustion zone and an ammonia / coal powder combustion zone, and the ammonia / coal powder combustion zone includes corner ammonia / coal powder burners and wall-mounted ammonia burners; when the ammonia co-firing ratio gradually increases, the wall-mounted ammonia burners are put into operation first, and then the corner ammonia / coal powder burners are put into operation; the upper-layer corner ammonia / coal powder burners and / or wall-mounted ammonia burners are put into operation first, and then the lower-layer corner ammonia / coal powder burners and / or wall-mounted ammonia burners are put into operation; by controlling the pulverized coal in the coal powder combustion zone to be in an incomplete combustion state, CO is provided for ammonia combustion in the upper-layer ammonia / coal powder combustion zone, making ammonia easier to burn. A SOFA zone and an SNCR denitration device are arranged above the ammonia burnout zone, which can reduce the emission of NOx.

The utility model provides a nozzle which comprises a first pipe body, a second pipe body, a third pipe body, a spray head assembly and an end cover. An air inlet and a material return opening are formed in the side wall of the first pipe body; a feeding hole and a temperature sensor mounting hole are formed in the side wall of the second pipe body; the nozzle assembly comprises a nozzle outer sleeve and a nozzle inner core, a nozzle cavity is formed in the nozzle outer sleeve, the nozzle inner core is located in the nozzle cavity, a nozzle hole penetrating through the two ends is formed in the center of the nozzle outer sleeve, a plurality of air grooves from the edge to the middle are formed in the end face, away from the third pipe body, of the nozzle outer sleeve, and a nozzle hole penetrating through the two ends is formed in the middle of the nozzle inner core. An end cover hole which penetrates through the two ends and corresponds to the spray hole is formed in the center of the end cover. When the nozzle is blocked, the nozzle assembly can be cleaned only by screwing off the end cover and then screwing off the nozzle assembly, time and labor are saved, efficiency is high, strength is low, and maintenance is easy and convenient.

The invention discloses a micro-mixing nozzle integrating heat pipe cooling and heat regeneration and a combustor, the micro-mixing nozzle comprises a heat pipe assembly I, a micro-mixing sleeve, an air mixing module and a fuel pipe, the micro-mixing sleeve, the air mixing module and the fuel pipe are coaxially arranged, and the heat pipe assembly I comprises a heat conduction ring, perforated fins, a heat pipe and heat pipe radiating fins; the overall combustor comprises a fuel cavity, an air cavity and a cooling cavity which are sequentially, coaxially and fixedly arranged at intervals from bottom to top, and a plurality of micro-mixing nozzles which are symmetrically arranged relative to the center of the overall geometric central axis are installed in the air cavity and the cooling cavity. According to the micro-mixing nozzle integrating cooling and backheating of the heat pipe and the combustor, the inlet area of the combustion chamber can be rapidly cooled, the service life of the combustor is prolonged, meanwhile, heat of the inlet area of the combustion chamber can be effectively utilized to preheat air, and the combustion efficiency is improved. The problem that the service life of an existing combustor is short due to thermal damage of a high-temperature backflow area to a micro-mixing nozzle can be solved.

The utility model relates to the technical field of full-premixing combustors, in particular to a novel full-premixing combustor for a cracking furnace, which comprises a bearing frame, a gas inlet pipe, a gas inlet component, a gas pump, a gas outlet pipe and a co-combustion component, a gas pipe is arranged on the lower side of the co-combustion component, a heat circulating pipe is arranged at one end of the co-combustion component, and a gas outlet pipe is arranged at the other end of the co-combustion component. A fan is installed at one end of the heat circulating pipe, a heat circulating pipe is arranged at the position, close to the heat circulating pipe, of one end of the mixed combustion component, an oxygen tank is installed at one end of the upper side of the bearing frame, and an oxygen pipe is arranged on the upper side of the oxygen tank. Heat in the mixed combustion component is circulated into the air inlet component, extracted air is preheated, the influence on the mixed combustion temperature of the combustor is avoided, oxygenation operation is conducted on the air inlet component through the oxygen tank and the oxygen pipe, the completeness of gas combustion is facilitated, gas and entering gas are mixed through the mixed combustion component, and the uniformity of gas combustion is improved.

The utility model belongs to the technical field of combustion, and particularly discloses a fire grate and a combustor. The fire grate comprises an inner shell, a rectification inner core and an outer shell assembly. Two inner rectifying plate parts are arranged at the upper end of the inner shell; the rectification inner core is inserted between the two inner rectification plate parts and is provided with a plurality of rectification inner plates, the two rectification inner plates on the outermost side are attached to the adjacent inner rectification plate parts, a first flame channel is formed between every two adjacent rectification inner plates, and the lower end of each first flame channel communicates with the corresponding first injection channel; second flame channels are formed in the positions, on the two opposite sides of the inner shell, of the outer shell assembly, an air channel is formed between the outer shell assembly and the inner shell, a communicating structure is arranged between the inner shell and the outer shell assembly, and the second flame channels communicate with the second injection channel through the communicating structure. According to the utility model, the combustion sufficiency can be improved, the local high temperature generated by combustion is reduced, and nitrogen oxides generated by combustion are reduced.

The present application belongs to the technical field of flame stabilizer design in aircraft engines, and specifically relates to a double-bend premixed preevaporated flame stabilizer, which is a double-bend flame stabilizer that uses external airflow for cooling and premixed preevaporation with fuel. The premixed preevaporation of fuel and external airflow can be used to improve the oil-gas ratio at the trailing edge of the stabilizer, thereby improving the ignition and flame stabilization capabilities at the left boundary of the aircraft engine, and can form an air film cooling on the tail plate through two rows of cooling holes to ensure structural reliability at the right boundary of the aircraft engine and when the intake temperature is high.

The invention relates to the technical field of boiler pulverized coal monitoring, in particular to a boiler pulverized coal monitoring method which comprises the following steps: determining whether a separation mode of a pulverized coal separator is qualified or not according to a comparison result of a particle size distribution characterization value of pulverized coal in a pulverized coal pipe at an outlet of a coal mill and a preset distribution characterization value; under the condition that the separation mode of the pulverized coal separator is determined to be unqualified, the angle of a guide blade of the pulverized coal separator is adjusted according to the radial flow velocity difference value of the pulverized coal pipe at the outlet of the coal mill; whether airflow mixing of the thick pulverized coal phase and the thin pulverized coal phase is qualified or not is determined based on the ignition interval; under the condition that airflow mixing is determined to be unqualified, a plurality of air speed adjusting coefficients are set according to the uniformity characterization value of temperature gradient distribution of the hearth to adjust the air speed of secondary air, and the air speed adjusting coefficients are optimized according to the flame shape characterization value in the hearth; and optimizing the preset distribution characterization value according to the fluctuation intensity of the combustion efficiency curve. The combustion efficiency of the pulverized coal is guaranteed while generation of nitric oxide is inhibited.

The utility model relates to the technical field of air preheaters of heating boilers, in particular to an air preheater of a heating boiler, which is characterized in that dust in air is filtered by starting an air inlet mechanism, the filtered dust is discharged into a heat exchange mechanism, and the air discharged by the air inlet mechanism is heated through heat dissipation of a heat dissipation mechanism. Hot air is discharged into the heat supply boiler by starting the discharging mechanism to preheat the heat supply boiler, the inner wall of the heat dissipation mechanism is cleaned by starting the cleaning mechanism, the heat dissipation function of the heat dissipation mechanism is prevented from being affected, and the practicability of the equipment is improved; comprising a smoke inlet mechanism; the smoke inlet mechanism is installed at the top end of the heat exchange mechanism, the heat dissipation mechanism is installed in the heat exchange mechanism, the air inlet mechanism is installed on the right side of the heat exchange mechanism, the exhaust mechanism is installed on the left side of the heat exchange mechanism, and the cleaning mechanism is installed at the top end of the heat exchange mechanism.

The invention discloses a low-emission ultralow-oxygen burner, and belongs to the technical field of burners, the low-emission ultralow-oxygen burner comprises a circular bottom plate, the circular bottom plate is provided with a mixing assembly, a processing assembly and an auxiliary assembly, by arranging a stirring unit, airflow atomized and mixed by a Venturi tube in a mixing cavity can be disturbed, and the airflow can be uniformly mixed; the mixing uniformity of fuel and air is further improved, sufficient preparation is provided for follow-up combustion, through the series connection design of the first combustion chamber and the second combustion chamber, the fuel is sufficiently combusted twice, and the combustion efficiency is improved. Part of tail gas is re-introduced into the combustion process through the flue gas recirculation technology, the energy utilization rate is further improved, fuel consumption is reduced, the mixing assembly, the processing assembly and the auxiliary assembly are all arranged to be capable of being automatically unfolded, and therefore a mixing cavity and a combustion cavity can be rapidly unfolded to be cleaned, maintenance is convenient and fast, the service life of the device is prolonged, and the practicability is high. And meanwhile, the operation flexibility is improved.