134results about How to "Stable combustion" patented technology

The invention discloses a plasma-enhanced direct-injection type liquid ammonia atomizing nozzle and a liquid ammonia combustor, and belongs to the field of liquid fuel combustion. The plasma-enhanced direct-injection type liquid ammonia atomizing nozzle comprises a liquid ammonia channel, a compressed air channel, an atomizing channel, a secondary air channel and a heating assembly, wherein the outlet end of the compressed air channel and the outlet end of the liquid ammonia channel are both communicated with the atomizing channel; the heating assembly comprises a high-voltage electrode, a ground electrode and a central air channel, the ground electrode is arranged on the outer side of the high-voltage electrode, and an outlet of the central air channel faces a discharge area formed by the high-voltage electrode and the ground electrode; a discharge area formed by the high-voltage electrode and the ground electrode is close to the liquid ammonia channel; a ground electrode hole is formed in the position, close to the liquid ammonia channel, of the ground electrode. Self-evaporation of preheated liquid ammonia is achieved through small plasma flames, efficient atomization of large-flow liquid ammonia is achieved, and consumption of atomization media is reduced while stable combustion is achieved.

The invention provides a low-load combustion optimization control system for a unit, and the system comprises a sensing network module which collects key parameters of the unit in a combustion process; the data preprocessing module is used for preprocessing the collected key parameters; the index analysis module is used for analyzing the energy balance deviation degree, chemical balance and combustion uniformity evaluation indexes of the current unit based on the preprocessed key parameters; the control strategy execution module is used for carrying out threshold value judgment on the result of each index and correspondingly executing preset energy balance, chemical balance and combustion uniformity strategies; the feedback regulation module is used for acquiring the executed feedback signal and performing new index analysis and cyclic regulation to form a closed-loop feedback mechanism; energy balance, chemical balance and combustion uniformity in the combustion process are analyzed and controlled, so that combustion stability and combustion efficiency are improved, pollutant emission is reduced, the service life of equipment is prolonged, and meanwhile, the adaptability of a unit to a power grid is enhanced.

The invention discloses a natural gas supply device for an industrial furnace, which relates to the technical field of gas supply systems for industrial furnaces, and comprises an annular guide rail which is arranged at the side end of a gas inlet flow regulation and control valve pipe in a sleeving manner and is used for driving an adjusting shaft and an ultrasonic generator to be positioned at the side end of a gas inlet pipeline to carry out ultrasonic frequency emission regulation and control, under the cooperation of the oxygen-containing regulation and control assembly, the oxygen content proportion in the natural gas in the oxygen-containing conveying pipe is rapidly corrected, the precise oxygen content needed by combustion of the industrial furnace is guaranteed, super-uniform mixing of natural gas and oxygen is integrally achieved, the incomplete combustion phenomenon caused by fluctuation of the oxygen content is reduced, and the heating effect and the product quality are improved; and under the cooperation of the ultrasonic adjusting assembly, more complex pipeline impurity conditions can be treated, so that emission parameters and reflection angles of self-adaptive automatic adjustment ultrasonic waves are formed, natural gas conveying is smoother, and therefore the combustion stability and heat efficiency of the industrial furnace are improved.

The invention provides a dual-fuel combustion nozzle which comprises a nozzle shell connected with a cooling plate. A hydrogen fuel gas collecting cavity and a liquid hydrocarbon fuel pipe which are coaxial are arranged in the nozzle shell; a first air channel is formed between the inner wall of the hydrogen fuel gas collecting cavity and the liquid hydrocarbon fuel pipe, and a swirler is arranged in the first air channel; a second air channel is formed between the outer wall of the hydrogen fuel gas collecting cavity and the inner shell of the nozzle shell; a liquid hydrocarbon spray hole is formed in the outlet end of the liquid hydrocarbon fuel pipe and is positioned in a space formed by the expansion section of the venturi structure; a hydrogen spray hole is formed in the side wall, close to the top end, of the hydrogen fuel collecting cavity. The invention further provides an engine combustion chamber comprising the combustion nozzle. According to the invention, efficient mixing of hydrocarbon fuel and hydrogen fuel can be realized, the phenomenon of backfire spontaneous combustion is avoided, the flameout boundary is widened, and stable switching of multiple working modes is realized.

The invention provides an integrated heat recycling type catalytic micro-combustor for marine equipment and a preparation method, and relates to the technical field of clean fuel catalytic combustion under the microscale. The integrated heat recycling type catalytic micro-combustor comprises a micro-combustor shell, and two sets of symmetrically-arranged partition plates are arranged on the inner side of the micro-combustor shell; the two sets of partition plates divide the interior of the miniature combustor shell into a first preheating channel, a gas outlet channel and a second preheating channel, the gas outlet channel comprises a combustion chamber and a gas outlet which are sequentially communicated, a bluff body is arranged on the inner side of the gas outlet channel, and concave cavities are formed in the partition plates and correspond to the combustion chamber in position. The inner side of the air outlet channel and the outer side of the bluff body are coated with a catalyst; according to the invention, the preheating channel is arranged to set the micro-combustor to be in a backheating form, unburned gas in the micro-combustor is preheated by tail gas after gas intake, so that the gas obtains a higher initial temperature in the micro-combustor, and the design optimizes the high-speed limit of mixed gas in the micro-combustor, strengthens the heat cycle in the combustor and effectively reduces the heat loss.

The invention provides an Al-Mg series welding wire and a preparation method and application thereof. The method comprises the steps that alloy raw materials are smelted and cast according to the component proportion, an obtained aluminum alloy cast rod is sequentially subjected to homogenization treatment, extrusion, hot rough rolling, hot finish rolling, drawing and coiling, and the Al-Mg series welding wire is obtained; wherein hot finish rolling emulsion is further used for hot rough rolling and hot finish rolling, the mass concentration of the hot rough rolling emulsion is larger than that of the hot finish rolling emulsion, and the pH of the hot rough rolling emulsion is smaller than that of the hot finish rolling emulsion. Alloy elements are uniformly distributed by controlling alloy components and using homogenization treatment and an extrusion process, so that component segregation is effectively eliminated, the welding wire has relatively high strength, and the wire processing performance is improved; meanwhile, a reasonable wire processing technology is adopted, the components of rolling emulsion are regulated and controlled, the surface quality of the welding wire is improved, the prepared finished welding wire can guarantee stable combustion of electric arcs and a molten pool in the welding process, and the welding seam quality is effectively improved.

The invention discloses a high-temperature turbulent environment particle ignition combustion testing device based on rotational flow flame stabilization, and belongs to the field of combustion testing. The burner is composed of an external rotational flow flame stabilizing device, a central premixing burner, an adjustable turbulence intensity pore plate and a central powder supply pipe. High-temperature and high-speed methane turbulence flames are generated through the central premixing burner, flame stabilization is conducted on the high-temperature and high-speed turbulence flames through the external rotational flow flame stabilization device, and the turbulence intensity of the flames is improved. A high-speed turbulent flow field and a high-temperature flue gas range are constructed through high-temperature and high-speed methane flames, combustion of aluminum particles in the turbulent flow field is achieved, and the combustion rule of the aluminum particles in a complex flow field is researched and tested. The turbulence intensity of high-temperature and high-speed turbulence flame is changed by changing the pore density and the pore diameter of the adjustable turbulence intensity pore plate, and the gas ratio in the central premixing combustor, so that simulation of different fuel gas oxygen enrichment degrees, turbulence intensities and flame temperatures is realized, and test analysis of different turbulence intensities on the combustion process of condensed phase particles is realized.

The invention belongs to the field of automobile engine energy saving, and particularly relates to an engine energy saving device and method for producing hydrogen through ultrasonic water mist and mineral particles, the device comprises a special water storage tank, an ultrasonic water mist generator and micro hydrogen production mineral particles, and the special water storage tank is divided into an ultrasonic water mist generation chamber and a mineral particle hydrogen production chamber through a permeation partition plate; the ultrasonic water mist generator is placed at the position 3 mm-5 mm below the liquid level of the ultrasonic water mist generating chamber, and water is atomized through external power supply. Micro-hydrogen production mineral particles are placed at the bottom of the mineral particle hydrogen production chamber and react with water to generate hydrogen, part of hydrogen is dissolved in water, and part of hydrogen is stored in the gas storage chamber above the liquid level. An air outlet is formed in the top of the special water storage tank and connected with an engine air inlet pipe, water mist and hydrogen enter an air cylinder along with engine suction to participate in acting, and therefore the redundant fuel injection amount is eliminated, and heat transfer loss in the cylinder is reduced. The heat efficiency of the automobile engine is improved, knocking is restrained, the incomplete combustion phenomenon is reduced, and then fuel consumption and harmful gas emission are reduced.

The invention relates to the technical field of combustion testing, in particular to a testing device for studying the combustion characteristic of nanofluid fuel. The device comprises an operation table, wherein a convenient combustion adjusting mechanism and a waste gas treatment assembly are mounted on the upper surface of the operation table; the convenient combustion adjusting mechanism comprises a storage tank and a combustion chamber, a pump body is arranged between the storage tank and the combustion chamber, a connecting pipeline is connected between the storage tank and the pump body, a pressure adjusting assembly is arranged between the pump body and the combustion chamber, and an outlet of the combustion chamber is connected with a waste gas treatment assembly; a combustion component and an igniter are arranged on the top of the inner side of the combustion chamber. According to the pressure adjusting assembly, fuel flowing and gas supply can be effectively controlled, the combustion process is stable, accurate test conditions are achieved, the reliability of test results is improved, and fuel performance can be deeply analyzed conveniently.

A multi-fuel combustor head permits hydrogen-doped or pure hydrogen combustion in some operating conditions. According to the control method of the multi-fuel combustion chamber, a low-pollution and low-carbon combustion organization form can be achieved. The multi-fuel combustion chamber head comprises a duty stage, the duty stage comprises a first air flow channel and a liquid fuel pipe, air provided by the first air flow channel and liquid fuel provided by the liquid fuel pipe are mixed in a pre-mixing space, and a second air flow channel extends on the periphery of the pre-mixing space, an outlet is located in the downstream side of the premixing space, a swirler is omitted in the second air flow channel, and an air supercharging device is arranged in the second air flow channel so that air can flow out of the outlet in an accelerated mode; the hydrogen distribution pipe comprises a plurality of spraying holes, and the spraying holes are arranged in a transverse spraying mode on the downstream of an outlet of the second air flow channel relative to the air flowing direction of the second air flow channel.

The invention discloses a liquid slagging boiler with a modular combustion chamber and a peak regulation method, and belongs to the technical field of fire coal consumption reduction of thermal power generating units. According to the method, on the basis of a combustion chamber of an existing liquid slagging boiler, the combustion chamber is divided into four modular combustion chambers with the same size, an independent fuel nozzle and an independent draught fan are installed on the outer side of each modular combustion chamber, so that each modular combustion chamber can be independently used, and in the peak regulation process, according to the peak regulation requirement, the modular combustion chambers can be used independently; and determining the use number of independent combustion chambers. The partition screens and the modular combustion chambers in the boiler are of detachable and splicable structures, so that each modular combustion chamber can be detached from the liquid slagging boiler to be replaced and spliced. According to the boiler, operation of the combustion chamber module can be accurately controlled according to actual load requirements, energy consumption is effectively reduced under the low-load condition, and the combustion efficiency is improved; and when the load is increased, sufficient steam supply is ensured.

The invention belongs to the technical field of engines, and discloses a rotary detonation combustion chamber which comprises a combustion chamber body, the combustion chamber body comprises a combustion chamber shell composed of an inner sleeve structure and an outer sleeve structure, a fluid channel is formed in the combustion chamber shell, and the inlet end of the fluid channel is a combustion chamber air inlet; the fluid channel comprises a combustion chamber throat section, a first expansion section, a U-shaped groove section, a second expansion section and a combustion chamber downstream straight section which are sequentially arranged. One end of the combustion chamber throat section communicates with the combustion chamber air inlet. And the U-shaped groove section comprises a U-shaped groove fillet section and a U-shaped groove straightway section which are arranged in sequence. The whole U-shaped groove fillet section is of a topological fluid diode structure, and one end, close to the first expansion section, of the topological fluid diode structure is of an arc-shaped structure. The topological fluid diode structure provides a new view angle and a new solution for optimization of the combustion chamber, and design and development of the more efficient and more stable combustion chamber are promoted.

The invention discloses a method and system for intelligently controlling thermal load of garbage entering a furnace through a garbage crane. The method comprises the steps that the heat value of the corresponding garbage entering the furnace is calculated through boiler thermal load or generating capacity after garbage incineration; according to the combustion residence time of the garbage in the incinerator, the heat value of the garbage entering the incinerator at the moment is reversely deduced; according to the amount of the garbage entering the furnace and the heat value of the garbage entering the furnace, the garbage entering-furnace heat load is calculated; setting the optimal thermal load of the garbage entering the furnace; controlling a garbage crane to feed garbage according to the optimal thermal load of the garbage fed into the furnace, and controlling the thermal load of the garbage fed into the furnace; correcting the combustion attribute of the garbage according to the heat value of the garbage entering the furnace, and recording the original attribute and the combustion attribute of the garbage; according to the method and system for intelligently controlling the heat load of the garbage entering the furnace through the garbage crane, the heat value of the garbage entering the furnace is calculated through the heat load or the generating capacity after garbage incineration, the heat load of the garbage entering the furnace is the product of the garbage entering amount and the garbage heat value, the optimal heat load of the garbage entering the furnace is set, and the heat load of the garbage entering the furnace is intelligently controlled through the garbage crane; and stable combustion of the incinerator is ensured.

The invention discloses a boiler drum with a preheating device, and relates to the technical field of boiler equipment.The boiler drum mainly comprises an air supply device body, an air supply pipe, an incinerator, an air outlet pipe and the like, a main air supply pipe is arranged at the bottom of the air supply pipe, an air supply side pipe is arranged at the tail end of the right side of the air supply pipe, and the right side of the main air supply pipe is connected with a connecting pipe and a mixing pipe; by means of a multi-channel air supply structure, the fuel combustion efficiency is improved, fuel combustion is more sufficient, a smoke inlet pipe, a heat conduction pipe, a smoke removal box and the like are arranged above an air outlet pipe, heat conduction fins are arranged on the outer side of the heat conduction pipe, and inner fins are arranged in the heat conduction pipe. And the fuel conveying branch pipe and the connecting pipe can be independently detached and overhauled, equipment maintenance is facilitated, the use process is clear, and high practicability and innovativeness are achieved.

The application discloses a premixing noise reduction burner and relates to the technical field of burners. The premixing noise reduction burner comprises a burner body and a gas mixing structure. The burner body is internally formed with a first premixing chamber and a second premixing chamber. A first sound insulation plate is located between the first premixing chamber and the second premixing chamber. The burner body is provided with a second sound insulation plate opposite to the first sound insulation plate. The first sound insulation plate is provided with an ignition mechanism. The gas mixing structure is arranged in the second premixing chamber. The first premixing chamber and the second premixing chamber of the premixing noise reduction burner can be used for mixing air and gas. The first sound insulation plate and the second sound insulation plate can reduce the flow rate of the mixed gas, so that the mixed gas can be more fully mixed. Meanwhile, the first sound insulation plate and the second sound insulation plate can also reduce the noise of the mixed gas. Therefore, the premixing noise reduction burner can fully mix the air and the gas, stably burn the mixed gas and effectively reduce the noise of the mixed gas.

This utility model relates to the field of conveying device technology, and in particular to a material conveying device for a cogeneration combustion boiler. The technical solution includes a support frame, a set of transmission rollers rotatably arranged between the support frames, and a transmission belt between the transmission rollers; a motor fixedly mounted on one side of the support frame, the output end of the motor being connected to one end of the transmission rollers via a diverter; and multiple connecting plates fixedly mounted on the outer wall of the transmission belt, with a hopper assembly for material conveying fixedly mounted on one side of each connecting plate. This utility model allows for flexible adjustment of the hopper's volume and shape according to actual production needs, thereby precisely controlling the material conveying amount, avoiding excessive or insufficient material conveying, reducing energy waste, lowering equipment operating pressure, and ensuring stable boiler combustion and production capacity output.

The utility model provides an inner ring fire cover and a combustor, and relates to the technical field of cooking utensils. The inner ring fire cover comprises an upper fire cover body and a lower fire cover body, the upper fire cover body detachably covers the lower fire cover body to form groove fire holes, and the groove fire holes are convenient to clean. A circle of flame stabilizing circular seam is arranged on the outer side of the fire cover in the circumferential direction, the flame stabilizing circular seam is arranged above the groove fire holes, and the flame stabilizing circular seam can well act on the root portions of the upper half portions of flames of the groove fire holes to play a role in flame stabilizing. Flame stabilizing holes are formed in the upper fire cover, the upper ends of the flame stabilizing holes communicate with flame stabilizing circular seams, the lower ends of the flame stabilizing holes communicate with groove fire holes, the multiple flame stabilizing holes communicate with the multiple groove fire holes and the flame stabilizing circular seams, gas can be guided to the flame stabilizing circular seams through the flame stabilizing holes, and the gas can be shunted and decelerated, so that the inner ring fire cover is not prone to leaving flames during combustion, and combustion is more stable; the flame stabilizing holes are formed in the upper fire cover, so that overflowing liquid is not prone to entering the flame stabilizing holes, the flame stabilizing holes are not prone to being blocked, and the inner ring fire cover can be conveniently kept clean.

This invention discloses a nicotine-resistant pectin lyase mutant and its application in tobacco leaf treatment. Using pectin lyase PL6 as the starting enzyme, this invention designs and optimizes mutation sites, designing single-site saturation mutations based on the two hydrogen bond formation sites between the enzyme and nicotine, Lys-107 and Asp-84, to construct mutants. The pectin lyase mutants D84A and K107R of this invention retain 83.63% and 81.30% of their enzyme activities at a 1% nicotine concentration, respectively. Spraying tobacco leaves with D84A and K107R enzyme solutions significantly improves tobacco leaf quality due to pectin degradation.

The application discloses a hot water boiler based on a porous medium burner, which comprises a hot water boiler shell, wherein the hot water boiler shell comprises a boiler barrel, the outer side of the boiler barrel is provided with a water jacket for storing water, and the inside of the boiler barrel is fixedly provided with a porous medium burner; the inner cavity of the porous medium burner comprises a combustion reaction zone, the two ends of the combustion reaction zone are provided with anti-backfire areas, the two ends of the porous medium burner are provided with mixed gas inlets, the mixed gas inlets are connected with mixed gas input pipelines, one end of the mixed gas input pipelines extends out of the hot water boiler shell and is connected with a gas fuel supply device; the porous medium burner is internally provided with an ignition device, mixed gas flows into the combustion reaction zone from the mixed gas input pipelines and is ignited by the ignition device, heat generated by combustion of the mixed gas heats water in the water jacket, flue gas is discharged from the combustion reaction zone through the pores of the porous medium of the porous medium burner and is discharged into a flue gas treatment mechanism connected with the hot water boiler shell, the gas utilization rate is improved, and the heat diffusion speed is slowed down.

This utility model relates to the field of gas appliance technology, specifically providing a honeycomb heating element and a burner for use in a burner. The honeycomb heating element includes a honeycomb heating element body and a first flow restrictor. The first flow restrictor includes a first flow restricting part and a second flow restricting part, which cooperate to form a groove-shaped structure. The honeycomb heating element body is embedded in the groove-shaped structure. The first flow restricting part is attached to the bottom of the honeycomb heating element body; the second flow restricting part is attached to the side surface of the honeycomb heating element body to form a tight, filling fit with the inner wall of the outer ring of the burner cavity when the honeycomb heating element body is installed in the burner cavity. This utility model improves the sealing performance of the honeycomb heating element when installed in the burner cavity, preventing gas flow from flowing out from the junction of the honeycomb heating element and the burner cavity, improving the stability of gas combustion, and avoiding backfire.

The invention relates to a thermal power generating unit control method and device, a medium, equipment and a program product, and relates to the technical field of power generation. The method comprises the following steps: acquiring operation data of a thermal power generating unit, the operation data comprising actual values of first operation data and second operation data, the first operation data comprises a historical power instruction value, a power grid frequency, an active power actual value, boiler thermal efficiency, load response time, a steam turbine heat consumption rate, a thermal power generating unit power generation coal consumption rate, a power supply coal consumption rate, coal feeding system parameters and the like, and the second operation data comprises equipment operation data of a thermal power generating unit; inputting the first operation data into the trained prediction model to obtain a prediction value of the second operation data; when the difference value between the actual value and the predicted value is smaller than a first preset threshold value, determining a current power instruction value according to the actual value and the predicted value; and the coal feeding amount and the air feeding amount are adjusted according to the current power instruction value. The method can improve the response speed of power regulation of the thermal power generating unit.

The utility model discloses an ammonia gas stable combustion device which comprises a flame generator, an ammonia gas adding device and a pure oxygen adding device, the flame generator enables ignition fuel and oxygen to be mixed and combusted to generate flames, the ammonia gas adding device is used for adding ammonia gas to the outer side of the flames, the pure oxygen adding device is used for adding pure oxygen to the outer side of the ammonia gas, and the ammonia gas is stably combusted in a high-temperature area of the flames under the oxygen-enriched condition. According to the device, ignition fuel and oxygen are mixed and combusted to generate flames, the temperature of a high-temperature area of the flames reaches 2000 DEG C, ammonia gas and pure oxygen are heated and ignited, and the ammonia gas is high in combustion speed and not prone to flameout under the oxygen-enriched working condition, so that the ammonia gas can be stably combusted in the high-temperature area of the flames under the oxygen-enriched condition.

The invention discloses the technical field of gas turbines, particularly relates to a nozzle combustor applied to a combustion chamber of a gas turbine, and aims to solve the problems that in the prior art, the gas turbine is difficult to stably combust at low emission under high-temperature and wide-load working conditions, and meanwhile, the cooling efficiency of a nozzle is relatively low; the nozzle structurally comprises an on-duty stage nozzle, a main combustion stage nozzle, a fuel rectifying plate and a nozzle upper cover plate, wherein the main combustion stage nozzle is positioned on the outer side of the on-duty stage nozzle; a mixture sprayed by the main combustion stage nozzle directly penetrates through a combustion area of the nozzle combustor; the fuel rectifying plate and the nozzle upper cover plate are wrapped to form an upper fuel cavity, the on-duty stage nozzle and the main combustion stage nozzle are communicated with a combustion area of the nozzle combustor through the nozzle upper cover plate, and fuel in the upper fuel cavity is in direct contact with the nozzle upper cover plate for heat exchange.

The utility model discloses a boiler flue gas recirculation device which comprises a boiler main body which is arranged on a base in a supporting mode through a supporting rod. The flue gas filtering assembly is arranged at the rear end of the boiler main body, the flue gas filtering assembly is connected with a flue gas outlet pipe of the boiler main body, and flue gas is filtered through the flue gas outlet pipe; the gas inlet pipe comprises a first inlet pipe and a second inlet pipe, the first inlet pipe is connected with the boiler main body, and the second inlet pipe is connected with a neutralizing seat on the base; a part of flue gas of the flue gas filtering assembly is neutralized by a neutralizing seat on the base, and is input into the boiler main body again to be combusted again; and the other part of flue gas is discharged through a discharge pipeline. According to the utility model, part of neutralized flue gas is re-introduced into the boiler for re-combustion, so that residual energy in the flue gas can be fully utilized, and the overall combustion efficiency and heat efficiency of the boiler are improved.

The invention provides a melting furnace for deeply removing organic matter in waste salt and a using method thereof.The melting furnace comprises a turbulent burner and a melting furnace body, a fuel gas channel, a combustion-supporting air channel and a feeding air channel are formed in the turbulent burner, the fuel gas channel is communicated with fuel gas supply equipment through a pipeline, the combustion-supporting air channel wraps the fuel gas channel, and the feeding air channel is communicated with the combustion-supporting air channel. The cyclone burner is arranged in the furnace body and is communicated with the combustion-supporting air blower, the feeding air channel wraps the combustion-supporting air channel and is communicated with the waste salt feeding system through the feeding air blower, the melting furnace body wraps the cyclone burner, a group of baffling ribs are arranged on the inner wall of the melting furnace body, and each baffling rib extends in the circumferential direction of the melting furnace body. According to the melting furnace, the problems of incomplete removal of organic matters, non-uniform heating, flue blockage and molten salt discharging in the waste salt melting treatment process can be effectively solved, so that the purpose of efficiently and quickly removing TOC in waste salt can be achieved.

The invention discloses a rotary smokeless open fire moxibustion device, and relates to the technical field of moxibustion health maintenance equipment. The box body is internally provided with a containing cavity, and a pedal extending to an opening is arranged in the containing cavity; a rotary moxibustion therapy assembly and a filtering and purifying assembly are further arranged in the box body. The rotary moxibustion therapy assembly comprises a stepping motor, a transmission gear set and a pomander used for fixing a moxa cone, and the pomander is eccentrically fixed to a rotating piece of the transmission gear set and driven by the stepping motor to rotate around the pedal area. The filtering and purifying assembly comprises a filtering cotton box, a three-way catalyst box and an exhaust port provided with a fan which are communicated in sequence. And the air inlet hole, the accommodating cavity and the filtering and purifying assembly on the box body are sequentially communicated under the driving of the fan to form a directional air circulation passage. The limitation that the traditional moxibustion position is fixed is broken through, and all-directional dead-corner-free physical therapy is achieved; meanwhile, through directional airflow and a multi-stage deep purification system, stable combustion of moxa cones is guaranteed, and environment-friendly zero emission of waste smoke is achieved.

The invention relates to a small and medium-sized garbage power generation system based on a Stirling engine and a control method. In the system, an engine is rotationally connected with a generator of the same module; the first side end of the radiator is communicated with each heat release component, and the second side end of the radiator is connected with ambient air; the input end of the waste heat boiler is communicated with each heat absorption component; the first input end of the gas heat exchanger communicates with the second side ends of the radiators, and the first output end of the gas heat exchanger communicates with the heat absorption components. The output end of the incinerator communicates with the second input end of the gas heat exchanger, the first input end of the incinerator communicates with the second output end of the gas heat exchanger, and the second input end of the incinerator communicates with the output end of the waste heat boiler. The method can be suitable for application scenes with low garbage yield and application scenes with high garbage yield, and the garbage combustion power generation efficiency is improved.

The invention relates to a combustion chamber nozzle of a fuel cell system, which comprises an inner cylinder and an outer cylinder, the outer cylinder is coaxially sleeved outside the inner cylinder, the outer diameter of the inner cylinder is smaller than the inner diameter of the outer cylinder, an annular space between the inner cylinder and the outer cylinder forms a rotational flow cathode tail gas inlet channel, a bluff body is coaxially arranged in the inner cylinder, the bluff body is cylindrical, and the outer diameter of the bluff body is smaller than the inner diameter of the outer cylinder. An end plate is arranged at the gas outlet end of the bluff body, through holes are densely distributed in the end plate, the outer diameter of the bluff body is smaller than the inner diameter of the inner cylinder, an annular space between the bluff body and the inner cylinder forms a rotational flow anode tail gas inlet channel, and a shaft hole of the bluff body forms a direct current anode tail gas inlet channel. The invention further relates to a combustion chamber adopting the combustion chamber nozzle and a flame tube air inlet method adopting the combustion chamber. The combustion mode that rotational flow diffusion is combined with bluff body flame stabilization is adopted, stable combustion of the combustion chamber under the conditions that gas composition changes are complex, residual gas coefficients are variable and the combustion heat value is extremely low is achieved, the stability of combustion flames is improved, and the outlet temperature of the combustion chamber is evenly distributed.

The utility model discloses a sonic torch burner. The sonic torch burner comprises a Laval nozzle, a gas inlet of the Laval nozzle is connected with a gas outlet of the torch gas pipe, and a pressure regulating valve is arranged at one end, far away from the Laval nozzle, of the torch gas pipe; a flow velocity sensor for monitoring the airflow velocity is arranged at the narrow throat of the Laval nozzle; and the pressure regulating valve and the flow velocity sensor are connected with the controller. The utility model further discloses an elevated torch and a ground torch. Through the combined control of the pressure regulating valve, the flow velocity sensor and the controller, the airflow velocity at the narrow throat of the Laval nozzle is ensured to be sound velocity, so that the stable supersonic speed regulation and control of the combustible gas velocity at the outlet of the Laval nozzle are ensured, and the combustion stability is further realized.

The present application relates to the technical field of aviation gasoline, and discloses unleaded aviation gasoline and a preparation method thereof.The unleaded aviation gasoline comprises: 75-85 wt% of polymethylbenzene, and 15-25 wt% of at least two of alkylate, a side line distillation component of an alkylate device, light naphtha and isopentane; wherein the motor octane number of the polymethylbenzene is not less than 108.The product quality index of the unleaded aviation gasoline meets the standard of the American Society for Testing and Materials, that is, the technical requirement of ASTM D7719-2018 high-aromatic unleaded aviation gasoline.The unleaded aviation gasoline has the characteristics of good component continuity, stable combustion and high motor octane number, and meets the high-standard use requirement of unleaded and high-octane aviation gasoline.