34results about How to "Improve combustion stability" patented technology

The present application belongs to the technical field of internal combustion engine, and particularly relates to a kind of alcohol hydrogen fusion engine precombustion chamber system and its control method.Alcohol hydrogen fusion engine precombustion chamber system includes the engine main body with the main combustion chamber and precombustion chamber being communicated with each other, and also includes methanol supply unit, hydrogen production unit, hydrogen delivery control unit, exhaust gas recirculation unit and main control unit;Main control unit collects engine operating parameters and judges current working condition, and adjusts methanol supply path, hydrogen supply path, precombustion chamber working mode, hydrogen production unit heating mode and on-off state of exhaust gas recirculation unit according to working condition.The present application can realize engine full-condition combustion performance optimization without complex auxiliary device, and also considers cold start reliability, high and low load combustion stability and operation energy efficiency, to improve the whole machine operation reliability and transient response capability.

The utility model provides a hand pressing type moxa cone manufacturing tool, which belongs to the technical field of moxa cone manufacturing, and comprises a bent plate and a straight plate which are mutually hinged through a hinge shaft, the free end of the bent plate extends to form a first pressing handle, and the free end of the straight plate extends to form a second pressing handle; the opposite sides of the first pressing handle and the second pressing handle are respectively provided with a connecting structure; the replaceable forming assembly comprises a female die detachably installed on the first pressing handle through a connecting structure and a male die correspondingly installed on the second pressing handle and provided with a forming through hole. A forming pressure adjusting assembly is arranged on the inner side of the second pressing handle and comprises a fixedly-arranged threaded sleeve and an adjusting rod in threaded connection with the threaded sleeve. The inner side of the first pressing handle is in threaded connection with a discharging ejector pin coaxial with the forming through hole. The moxa manufacturing device is simple in structure and convenient to operate, the moxa manufacturing efficiency and quality can be effectively improved, and market requirements are met.

The utility model belongs to the combustion technical field, specifically discloses a kind of fire, combustor and gas hot water equipment.Fire includes inner shell and inner core piece.Inner shell is surrounded and is formed with the first injection passage and first gas passage of intercommunication, and the upper portion of inner shell has two rectifier vertical board parts that are relatively arranged and spaced apart in width direction;Inner core piece is inserted in the upper portion of first gas passage and has two rectifier board parts that are relatively arranged and spaced apart, and vertical intermediate flow passage is formed between two rectifier board parts, and the lower portion of each rectifier board part is formed with core plate profile stamping in the direction away from each other, and core plate profile stamping is vertically arranged and is in contact with rectifier vertical board part of corresponding side, and the upper end of core plate profile stamping is spaced apart with rectifier board part to form air vent, and the upper portion of each rectifier board part is formed with side flow passage with upper open between rectifier vertical board part, and side flow passage is communicated with air vent of corresponding side.The utility model can reduce the processing difficulty of fire, improve the stability of combustion.

According to the energy-saving system of the coal-fired boiler, when the boiler operates at a low load, part of steam generated during operation of the boiler is used for heating secondary air by arranging the secondary air heater, so that combustion of fuel in a hearth is stabilized, meanwhile, the temperature of flue gas at an outlet of the economizer is increased, and energy is saved. The inlet flue gas temperature of the SCR denitration device can meet the requirement of low-load commissioning; meanwhile, the steam pressure reducer and the sludge drying device are arranged, part of steam generated during operation of the boiler is extracted to be subjected to pressure reduction through the steam pressure reducer to be used for drying the sludge, the dried sludge is input into the boiler to be mixed with pulverized coal for combustion, and the coal combustion cost is saved. According to the device, through cooperative use of the equipment, secondary air can be heated when the boiler is in low load, and the combustion stability of the boiler is improved; and sludge can be blended and burnt under high load, so that the fuel cost is reduced.

This invention provides a waste pyrolysis gas combustion device and its combustion method, belonging to the field of waste treatment technology. The invention includes: a shell, foam ceramic balls, a central tube, a preheater, a mixing tube, a co-firing air sleeve, and a flow-dispersing component. This invention uses foam ceramic balls as a heat storage carrier in conjunction with a preheater to achieve stable ignition of pyrolysis gas with low calorific value fluctuations, effectively adapting to the combustion requirements of waste pyrolysis gas with low calorific value and parameter fluctuations, and improving combustion stability. The flow-dispersing component in the mixing tube enhances gas-gas mixing, improving combustion efficiency and pollutant control, increasing combustion completeness, reducing pollutant generation, and optimizing combustion efficiency. The compact structure of the nested central tube and mixing tube with annular slot air intake achieves efficient space utilization and integrated application, realizing precise gas distribution and efficient mixing within a limited space. The overall layout of the device is compact and easy to integrate.

The utility model provides a kind of for coke oven tail gas combustion device, belongs to tail gas combustion technical field, comprising: combustion chamber, raw gas import, combustion air import, ignition needle, explosion door, first baffle and smoke outlet;Combustion chamber includes inner shell and outer shell, combustion air passage is equipped between inner shell and outer shell, inner shell is equipped with multiple air holes, inner shell is connected with raw gas import, combustion air passage is connected with combustion air import;Ignition needle is embedded in inner shell inside one end, and ignition needle is located above raw gas import;Explosion door is rotatably connected with combustion chamber, and covers in the opening of combustion chamber;The device passes through raw gas first by ignition needle and is ignited to occur first combustion, then fully mixes with combustion air in combustion chamber interior and occurs secondary combustion, to improve combustion efficiency, and after the gas after combustion is guided and shunted, then is discharged through smoke outlet, avoid airflow direct impact smoke outlet, reduce the risk of turbulence generation and smoke outlet blockage.

This invention discloses a swirl-spray pre-combustion chamber co-combustion system and method for a UAV diesel engine. The system includes a cylinder block integrating a spherical pre-combustion chamber and a main combustion chamber, a glow plug, a swirl injector, a main injector, and a control unit. The swirl injector injects igniting diesel fuel into the pre-combustion chamber, forming a rich mixture adhering to the wall. After ignition by the glow plug, the high-temperature combustion gas is injected into the main combustion chamber through a jet channel to achieve multi-point synchronous ignition. The control unit integrates altitude adaptive correction and a dual closed-loop control strategy to match injection and ignition parameters in real time. This invention can effectively shorten the combustion duration, reduce cycle fluctuations, and significantly improve the combustion stability and environmental adaptability of the engine over a wide operating range.

The utility model relates to the field of engines, in particular to an engine cylinder head cover and an engine. The engine cylinder head cover comprises a cylinder head cover body, an ignition device, an oil injection assembly and a pre-combustion chamber. The pre-combustion chamber comprises a mounting plate and a chamber main body; the cavity body extends into the cylinder head cover body, and an opening is formed in the top of the cavity body. The oil injection assembly comprises an oil injector which enters the cavity body from the opening. The ignition device penetrates through the cylinder head cover body; the chamber main body is provided with a first socket, and a spark plug of the ignition device enters the chamber main body from the first socket; a communicating hole is formed in the bottom end of the chamber main body; the mounting plate is connected with the top of the chamber main body, and the mounting plate is used for being connected with a cylinder cover; a receding opening is formed in the cylinder head cover body and used for containing the mounting plate. Fuel oil can directly enter the pre-combustion chamber to be fully atomized, and the quality and combustion stability of mixed gas are improved. And the optimization of the space layout of the engine cylinder head cover can be realized, and the structural compactness is ensured.

The utility model discloses a burner with an inner and outer independent gas distribution disc structure. The burner comprises a furnace end, an inner ring gas distribution disc, an outer ring gas distribution disc and a water disc main body, the furnace end comprises a furnace seat plate, an inner ring injection pipe and an outer ring injection pipe; the gas outlet ends of the inner ring injection pipe and the outer ring injection pipe are respectively inserted into the inner ring gas distribution disc and the outer ring gas distribution disc; the furnace seat plate is provided with at least two water tray connecting holes; the water disc main body is mounted on the cooker panel and is locked in the water disc connecting hole through the water disc bolt; a plurality of outer ring positioning cylinders are arranged below the outer ring gas distribution disc, and the outer ring positioning cylinders correspond to the water disc connecting holes in position one by one; the lower portion of the outer ring positioning cylinder can be arranged at the end of a water pond bolt in a sleeved mode. According to the utility model, the inner and outer ring gas distribution discs adopt an independent split structure, the outer ring gas distribution disc is directly sleeved and positioned with the water disc bolt end through the outer ring positioning cylinder, and the inner ring gas distribution disc can be independently mounted in an aligned manner by virtue of the furnace seat plate.

The invention relates to an energetic material based on a urea-potassium perchlorate eutectic system and a preparation method of the energetic material, and belongs to the technical field of safe and environment-friendly energetic materials. The energetic material based on the urea-potassium perchlorate eutectic system is prepared from the following components in parts by weight: 18 to 35 parts of high-molecular fluorine polymer with the particle size of 50 to 400 microns; 15-40 parts of active metal powder with a particle size of 10-75 [mu] m; 10-30 parts of urea with a particle size of 20-100 [mu] m; 12-35 parts of potassium perchlorate with a particle size of 10-120 [mu] m; 0.5 to 3 parts of a silane coupling agent; 0.5 to 5 parts of a binder; 5 to 10 parts of nano silicon dioxide; 0.5-3 parts of a stabilizer; the urea and the potassium perchlorate are used for constructing a urea-potassium perchlorate eutectic system. According to the energetic material, through co-crystallization treatment of urea and potassium perchlorate, the synergistic effect of an oxidizing agent and a gas generating agent is optimized, and then the problems that a traditional energetic material for emission is large in pollution and poor in safety are solved.

This application discloses a vehicle heating control method and device, belonging to the field of vehicle technology. The method includes: receiving a heating activation request; acquiring the external ambient temperature and the engine coolant temperature; and, when the external ambient temperature is not higher than a first temperature threshold and the coolant temperature is higher than a second temperature threshold but not higher than a third temperature threshold, controlling the thermostat to open at a fixed reference opening degree to activate the heating circuit. This application, by acquiring the external ambient temperature and the engine coolant temperature and comparing the external ambient temperature with the first temperature threshold, avoids accidental user operation of the heating switch in high-temperature environments; simultaneously, by comparing the coolant temperature with the second and third temperature thresholds, it ensures that the engine operates at its optimal state while providing heating.

The utility model discloses a kind of biomass cyclone combustor, belong to burner technical field, this one kind of biomass cyclone combustor, including burner body, the one end of burner body is provided with biomass nozzle, the other end of burner body is provided with the import of biomass powder airflow, the import of biomass powder airflow is connected with external biomass powder transport system, burner body is located the one end of biomass nozzle and is provided with body cone, body cone and burner body between are provided with cyclone plate, and cyclone plate is fixedly installed on the inner wall of burner body;The present biomass cyclone combustor is arranged in the center wind cylinder of cyclone combustor by the whole burner body, without needing to reconstruct the overall structure of original cyclone combustor, only by self modularization design can be completed installation, greatly reduce the equipment reconstruction difficulty and cost, while avoiding the structural damage risk brought by water-cooling wall opening.

The utility model discloses a low-nitrogen combustor capable of automatically adjusting the air volume, and relates to the field of low-nitrogen combustors, the low-nitrogen combustor comprises a combustor body, a base plate, an air inlet pipe, a fixing box, an adjusting assembly and a rectifying assembly, a motor drives a transmission rod to rotate through cooperation of a worm and a worm gear, and the transmission rod drives a gear ring to rotate through a transmission gear; the gear ring drives the transmission gear at one end of the rotating rod to rotate, then the adjusting plate is driven to rotate, the air inlet amount is adjusted, manual adjustment is not needed, convenience and rapidness are achieved, and through arrangement of the partition plates in the inserting cylinder, air inlet turbulence is eliminated, it is guaranteed that entering airflow is evenly distributed, and combustion stability is improved; and the threaded sleeve is reversely rotated to drive the external threaded cylinder to move, so that the external threaded cylinder is controlled to extrude the insertion cylinder, the insertion cylinder is conveniently pulled out to clean and maintain a partition plate in the insertion cylinder, and carbon deposition caused by long-term use, airflow resistance increase and influence on the efficiency of the combustor are avoided.

This invention discloses a multi-dimensional synergistic combustion control system and method for methanol engines under all operating conditions, belonging to the field of internal combustion engine combustion control technology. Addressing the technical problems of existing methanol engines, such as difficulty in achieving precise control of combustion state under all operating conditions, poor adaptability to operating conditions, and insufficient combustion stability, this invention achieves optimized combustion under all engine operating conditions through a multi-dimensional synergistic control strategy. Real-time engine operating condition data is collected to accurately determine the combustion mode of the target engine. Based on this, the engine intake valve operating parameters are continuously and independently controlled to dynamically optimize the in-cylinder combustion boundary conditions. Simultaneously, an active modifier is injected into the engine intake manifold, and the injection ratio is continuously adjusted in real time according to the engine operating conditions to improve the combustion activity of the air-fuel mixture. Furthermore, combining engine operating condition data with the predetermined combustion mode, the injection timing, number of injections, and injection pulse width of methanol fuel in the cylinder are precisely determined, achieving precise methanol injection at the crankshaft angle corresponding to the cylinder compression stroke.

The invention provides a method, device and equipment for controlling oil injection and a computer readable storage medium. The method comprises the steps that operation parameters of a vehicle are obtained; the Miller degree in a target air cylinder of the Miller cycle engine at the current moment is determined; the Miller degree is used for representing the intensity of the Miller cycle in the target air cylinder; based on the Miller degree and the operation parameters of the vehicle, oil injection parameters of the target air cylinder are determined through a preset oil injection control model; the oil injection parameters are used for compensating the change of the thermodynamic state in the target air cylinder caused by the Miller cycle; and a target fuel injector corresponding to the target air cylinder is controlled to execute fuel injection according to the fuel injection parameters.

This invention discloses a combined power cycle system and method for cooling incoming air using ammonia-water, relating to the aerospace field. The system can switch between turbine-ramjet operating modes through an adjustable structure. Particularly during turbine-ramjet switching, ammonia-water is used to cool the high-temperature incoming air in the intake duct. The absorbed ammonia-water is then distilled to separate high-temperature ammonia gas and water. This invention combines heat exchanger precooling and jet precooling, effectively increasing the pressure ratio of the fan and compressor through multiple air cooling processes. This improves the compressor outlet gas temperature, thereby reducing compressor power consumption and providing greater thrust. Ammonia, as a supplementary fuel, has a higher specific impulse, addressing the thrust gap during engine mode transitions and effectively widening the operating speed range of the turbine engine.

The application discloses a kind of liquid fuel nonlinear combustion control method, by adjusting the flow and frequency of fuel and combustion-supporting gas, control fuel flow and combustion-supporting gas flow present continuous wave function input, make it present nonlinear periodic variation, to ensure that fuel high-efficiency atomization combustion.The application not only can form negative pressure by frequency conversion coupling intensification air convection in furnace, make the temperature in furnace more uniform, also improve the efficiency and stability of fuel combustion, make resource get rational utilization, wherein CO emission reduces 20% to 40%, NO content reduces 10% to 20%, NO X Down 12% to 18%, effectively reduce the emission of pollutants.

This invention relates to the field of supersonic inlet start-up and active flow control technology, aiming to solve the problems of inlet flow separation, shock wave boundary layer interference, and start-up lag in existing scramjet engines. It provides a miniature supersonic nozzle array device and engine for enhancing inlet start-up. The miniature supersonic nozzle array device includes a rotating mechanism on which multiple nozzles are mounted, arranged at intervals. The airflow channel inside each nozzle is an acceleration channel, and the airflow channel between two adjacent nozzles is a deceleration channel. The acceleration channel is sequentially divided into an acceleration channel inlet section, a central contraction section, and an acceleration channel outlet section along the gas flow direction. The cross-sectional size of the central contraction section is smaller than that of the acceleration channel inlet section and the acceleration channel outlet section. This invention effectively solves the problems of shock wave boundary layer interference, flow separation, and start-up lag at the inlet lip under high Mach number conditions.

This utility model discloses a tangential combustion system for pulverized coal boilers suitable for low-volatile coal types. It includes a boiler body, an air preheater, a secondary air fan, a primary air fan, and multiple coal mills. Each coal mill outlet is connected to multiple pulverized coal pipes. All pulverized coal pipes are connected to pulverized coal burners on the boiler body. Each pulverized coal burner is equipped with a burner air box. The secondary air fan outlet is connected to the burner air box via the air preheater. The primary air fan outlet is divided into two paths: one path connects to the hot primary air duct after passing through the air preheater, and the other path directly connects to the inlet of the hot primary air duct. The hot primary air duct outlet is divided into two paths: one path directly connects to the inlet of each coal mill, and the other path connects to the pulverized coal pipe at the outlet of each coal mill via a bypass hot primary air duct. This utility model can significantly increase the initial temperature of pulverized coal entering the furnace, improving the ignition and stable combustion capabilities of low-volatile coal.

The application provides a control method and system for heating furnace combustion optimization, comprising the following steps: S1, connecting a control station with an original fuel control system through Ethernet, and connecting a control manual channel of the original fuel control system; S2, performing temperature control, using relevant valve experience data and furnace change response data to confirm the change amount of the valve and the temperature change corresponding relationship; S3, using actual temperature field change data to perform operation judgment, and sending an execution signal to the relevant valve through temperature difference calculation selection; S4, completing air flow control by the relevant air valve; and S5, sending a control signal to the original fuel control system to complete control. The application improves the combustion stability of the heating furnace, reduces the high dependence on manual operation experience at present, reduces gas consumption and oxidation loss, has high control precision, fast speed response, stable combustion trend, reasonable air-fuel ratio, low modification difficulty and connection safety.

The application relates to a heat management system and a hybrid automobile, and belongs to the technical field of automobiles. The heat management system comprises a water-cooling heat dissipation circuit, the water-cooling heat dissipation circuit comprises a first water pump, an electric drive component and a radiator which are connected in sequence to form a circulation through pipelines; an engine intake circuit, the engine intake circuit comprises an engine and a supercharger, and a water-cooled intercooler is connected in series on an intake pipeline between the supercharger and the engine; an intercooled heat exchange branch, the intercooled heat exchange branch is connected in parallel with the water-cooling heat dissipation circuit and exchanges heat with the engine intake circuit through the water-cooled intercooler, and a valve and a second water pump are connected in series on the intercooled heat exchange branch. The water-cooled intercooler is connected to the water-cooling heat dissipation circuit through the intercooled heat exchange branch, the valve opening degree and the second water pump duty cycle are adjusted, the temperature of the air after intercooling is controlled in real time, the problem of condensate water condensation and accumulation in the intake pipeline is solved, the engine combustion stability is improved, and the vehicle power is ensured.

The utility model relates to the field of combustion devices, in particular to a high-pressure atmosphere pulverized coal combustion device which comprises a pressure-resistant shell and a base, a flat flame combustor is arranged in the pressure-resistant shell and located above the base, ignition electrodes are inserted into the two sides, close to the lower end, of the pressure-resistant shell, and windows are arranged on the other two adjacent sides of the pressure-resistant shell. A pressure sensor and a temperature sensor are inserted in the pressure-resistant shell close to the middle position; a combustion chamber is arranged in the pressure-resistant shell, a cooling cavity is formed between the pressure-resistant shell and the combustion chamber, a water inlet is formed in the lower end of the cooling cavity, a water outlet is formed in the upper end of the cooling cavity, and a pressure relief exhaust valve is arranged at the top of the pressure-resistant shell. According to the high-pressure atmosphere pulverized coal combustion device, after pulverized coal is combusted in the high-pressure atmosphere, the shell which is rapidly heated can be rapidly cooled, thermal stress and structural stress in the combustion chamber and the pressure-resistant shell can be rapidly adjusted, and the risk that the combustion chamber and the pressure-resistant shell are subjected to stress corrosion cracking can be reduced.

The invention provides a pulverized coal burner assembly applying the coanda effect and a pulverized coal burning device with the coanda effect, and the pulverized coal burner assembly comprises a plurality of burners which are arranged around a preset axis at intervals, and the connecting line between the center point of an outlet of each burner and the preset axis is a preset connecting line; the included angle between the outlet axis of the combustor and the preset connecting line is an acute included angle, and a vertical plane passing through the outlet axis of the combustor is a preset plane; the guide part is arranged on the side wall of at least one combustor and located on the fire facing side of the combustor, and the distance D1 between the first side of the guide convex curved surface and the outlet axis of the combustor is smaller than the distance D2 between the second side of the guide convex curved surface and the outlet axis of the combustor. According to the technical scheme, the problem that in the prior art, the pulverized coal combustion stability is poor under the low-load condition can be effectively solved.

This invention discloses a combustion stabilization device for coal-fired power units. The device includes a burner and a stabilizer, which are connected to the burner and extend along a first direction. The stabilizer includes a shell and a pulverized coal pipe assembly. The shell includes a cavity, and at least a portion of the pulverized coal pipe assembly is disposed within the cavity. The outer circumferential surface of the pulverized coal pipe assembly is sealed to the shell. The pulverized coal pipe assembly contains a first channel and a second channel, which are spaced apart within the assembly and both communicate with the cavity. The outlet of the first channel is adjacent to the inlet end of the pulverized coal pipe assembly relative to the outlet of the second channel. Therefore, the combustion stabilization device for coal-fired power units according to this invention has advantages such as good combustion stability, good environmental performance, and low production cost.

A multi-stage partition low-nitrogen ammonia gas cyclone burner comprises an internal air assembly, an internal air assembly is a passage of a rear thick and a front thin, an internal cyclone air cylinder is placed inside, and an internal air flow forms an axial cyclone after passing through the cyclone air cylinder; an ammonia gas assembly, an end of the ammonia gas assembly forms an annular gap with the internal air assembly, and ammonia gas uniformly flows into a combustion chamber through the annular gap; an external air assembly, the external air assembly is installed at the end of the ammonia gas assembly, external air flows out radially through a circle of small square holes at the end of the external air assembly, and forms a radial cyclone; a center combustion-supporting assembly, the center combustion-supporting assembly is a thin tube installed inside the internal air passage, and fuel is hydrogen; and an outlet combustion-supporting assembly, the outlet combustion-supporting assembly is a ring channel installed at the end of the external air assembly, a plurality of small nozzles are arranged outside the ring channel, and fuel is hydrogen. After ammonia gas is sprayed out from the annular gap, the ammonia gas can be uniformly mixed with internal and external cyclone air, the combustion-supporting assemblies as a whole form a wrapping range of a bottom high-temperature jet flow and a plurality of external high-temperature points, and ammonia gas can be stably combusted in the range.

The invention relates to the technical field of combustors, and discloses a single-cavity double-fire-ring furnace end which comprises a base, the base comprises a barrel, a cavity with an opening in the lower end is formed in the barrel, a positioning cover covers the upper end of the cavity, and a detection needle and an ignition needle are installed on the positioning cover; the combustor comprises a fire cover, the lower end cover of the fire cover is provided with a bottom plate, and a premixing cavity is formed between the fire cover and the bottom plate; a through hole is formed in the center of the fire cover, an extension plate extending towards the inner side is arranged on the inner wall of the through hole, and the positioning cover is used for positioning and supporting the extension plate, so that a gap is formed between the bottom plate and the base; compared with a traditional double-cavity and double-air-channel structure, the single-cavity double-fire-ring furnace end has the advantages that the number of parts can be reduced, the size is reduced, the machining and assembling difficulty and the production cost are reduced, the fire cover is placed stably, the positioning precision is improved, deviation is avoided, uniform flame distribution is guaranteed, a large amount of heat of a detection needle and an ignition needle can be prevented from being transferred downwards, and the service life is prolonged. Heat accumulation is further avoided, aging is effectively delayed, and the service life is prolonged.

The invention belongs to the technical field of industrial process control, and discloses a biomass gas coupling multi-working-condition cooperative control method and system. Comprising the following steps: collecting combustible gas channel inlet pressure, outlet pressure, combustible gas volume flow and heat exchanger outlet temperature, and arranging pipe section wall temperature measuring points; the temperatures of the pipe section wall temperature measuring points are sequenced, and the cold point position and the cold point side temperature are determined in combination with the proportion threshold value and the deviation threshold value; subtracting the contrast section temperature difference value from the cold point side temperature difference value to obtain a net temperature difference variation; establishing a flow health baseline data set, and obtaining a net resistance increment according to the channel pressure difference variable quantity; comparing the net temperature difference variable quantity and the net resistance increase quantity with a risk threshold value to obtain a risk state; differential processing and cooperative constraint control are executed based on the risk state; according to the method, the tar condensation deposition risk is recognized in advance and effectively treated through cooperative operation constraint control of cold point side temperature determination, three-state risk and treatment action linkage.

The present application relates to the technical field of coal underground in-situ gasification, and particularly relates to a high-gas coal seam coal underground in-situ gasification safety ignition method. The present application accurately divides the ignition area based on the length, width and coal seam thickness of the gasification channel; meanwhile, the present application adopts a double-monitoring-unit setting mode of the ignition area and the gas transmission direction to realize blind area-free monitoring of the gasification channel, which not only meets the partition monitoring requirement, but also guarantees the continuity and accuracy of parameter collection, and provides reliable data support for subsequent gasification channel pressure maintenance, purging and ignition point selection. The present application adopts gas introduction for pressure maintenance treatment in the gasification channel, so that the gas adsorbed in the coal seam fissures can be separated out and mixed with air, and the distribution of the gas in the whole channel and the surrounding fissure network is more uniform; meanwhile, the gasification channel is purged after pressure maintenance, so that the gas in the gasification channel can be quickly discharged, and the efficiency of gas discharge is increased.

The invention relates to a low-nitrogen pulverized coal burner suitable for ultra-low load and a burning method, and belongs to the technical field of pulverized coal furnace burning. The pulverized coal burner is provided with a pulverized coal channel and a rich-lean separation device, the rich-lean separation device is composed of multiple stages of separation baffles, and all the stages of separation baffles are sequentially arranged in the axial direction of the pulverized coal channel. The pulverized coal channel is divided into a first-stage concentrated phase channel and a first-stage light phase channel through a first-stage separation baffle; the first-stage concentrated phase channel is divided into a second-stage concentrated phase channel and a second-stage light phase channel through a second-stage separation baffle; the (n-1) th-stage concentrated phase channel is divided into an n-stage concentrated phase channel and an n-stage light phase channel through an n-stage separation baffle; and a hydrogen swirl nozzle and an igniter are arranged in the n-stage concentrated phase channel. The method can be applied to the scene of deep peak regulation of the coal-fired boiler, the problem of heat efficiency reduction caused by ultralow-load operation is comprehensively considered and solved, and safe, efficient and environment-friendly operation of the pulverized coal boiler under the ultralow-load working condition is achieved.

The application provides a high-compression-ratio ethanol fuel gasoline engine combustion system and a control method thereof, wherein the system comprises: a high-compression-ratio combustion structure with a compression ratio of 14-15, the combustion structure comprises a piston top with an omega-shaped shallow pit structure, and the surface of the piston top is provided with a silicon nitride ceramic coating; a cold start enhancement system comprising a PTC ceramic heating module and a high-energy ignition device; a fuel injection system comprising a high-pressure common rail system and a multi-hole swirl oil injector; and a control system comprising an ECU control unit and a UEGO wide-range oxygen sensor. The high-compression-ratio ethanol fuel gasoline engine combustion system and the control method thereof can realize high thermal efficiency, reliable start at low temperature, stable combustion and low emission.