344results 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 utility model discloses a multi-stage split energy-saving combustion device for liquid fuel, the energy-saving combustion device is composed of a combustion cylinder, an ion combustion body and a combustion body installation box in sequence from top to bottom, the upper end of the ion combustion body is fixedly connected with the combustion cylinder, the lower end of the ion combustion body is provided with an impeller air inlet channel, and the combustion cylinder is fixedly connected with the combustion body installation box. The impeller air inlet channel is located in the combustion body installation box, the combustion body installation box is of a hollow cavity structure, and a fan air inlet and an oil inlet hole are formed in the side face of the combustion body installation box. Compared with the prior art, the atomization combustion mode of an original electronic injection fuel stove is changed essentially, atomization of a high-pressure atomization nozzle is not needed, high-temperature vaporization combustion of liquid fuel is achieved in the first-stage combustion cavity, stable combustion and sufficient vaporization are achieved in the second-stage combustion cavity, and sufficient combustion and heating are achieved in the third-stage combustion cavity. The energy consumption is lower, the heat utilization rate is nearly doubled, the safety is higher, the independence is good, and the applicability is wide.

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 relates to a single-side gas inlet SOFC burner with wide working condition and low pressure loss in the field of solid oxide fuel cells. An ignition rod sleeve for arranging an ignition rod is arranged in the middle of the top of a combustion chamber of the single-side gas inlet SOFC burner; the top of the combustion chamber is further provided with an anode tail gas distribution channel and a cathode tail gas distribution channel, and the anode tail gas distribution channel and the cathode tail gas distribution channel are sequentially arranged on the periphery of the ignition rod sleeve in a surrounding mode. And cathode tail gas and anode tail gas are uniformly introduced into the combustion chamber in a ring-surface-shaped gas outlet manner after passing through respective independent distribution channels. The anode tail gas and the cathode tail gas are evenly input into the combustion chamber in an annular mode, the consistent flow density is kept on the annular face, the two kinds of tail gas are fully mixed in the combustion chamber, the ignition rod conducts centered ignition, flame deflection is avoided, local overheating is reduced, the stable combustion state is achieved, and stable combustion within the wide working condition range can be achieved easily; and the pressure loss caused by non-uniform gas distribution is reduced.

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 a powder fuel-based cross-medium ramjet engine which comprises a powder fuel cabin, a combustion chamber and a spray pipe are fixedly connected to the axial front end of the powder fuel cabin, a high-pressure gas tank is fixedly connected to the axial rear end of the powder fuel cabin, and a plurality of gas generators are fixedly arranged on the inner wall of the combustion chamber; a plurality of air inlet channels are arranged on the outer wall of the combustion chamber; the high-pressure gas tank is communicated with the powder fuel cabin through a high-pressure gas flow channel and a fluidization pipeline, and is communicated with the gas inlet channel through a gas inlet channel pressurizing pipeline; a liquid medium cavity is formed in the air inlet channel and communicates with the combustion chamber through a liquid medium main supply pipeline, an upstream liquid supply pipeline and a downstream liquid supply pipeline. Combustion energy release of the powder fuel in the air mode and the underwater mode of the cross-medium ramjet engine is effectively promoted, and the method is suitable for the powder fuel cross-medium ramjet engine.

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 discloses a method for measuring high and low calorimetric values of blast furnace fly ash, which relates to the technical field of blast furnace fly ash calorimetric values, and comprises the following specific steps: step 1, calibrating the thermal capacity of a calorimeter, continuously measuring a plurality of groups of thermal capacity data, and carrying out average value calculation to obtain the average thermal capacity data of the calorimeter to finish calibration; 2, measuring as received basis moisture of the sample; 3, measuring the air dry basis moisture of the sample; 4, measuring the air dry basis total sulfur content of the sample; 5, measuring the air dry basis hydrogen content of the sample; 6, measuring the cylinder calorific value of the sample; and 7, calculating high and low calorific values. According to the method, a rapid calorimeter is adopted as a detection instrument, a blast furnace dedusting ash sample is put into a sealed oxygen bomb filled with high-pressure pure oxygen to be burnt, the calorific value of a bomb cylinder is obtained, the moisture, total sulfur and hydrogen content of the bomb cylinder are measured and brought into a calorimeter testing system to be calculated, and therefore the high and low calorific values of the blast furnace dedusting ash are measured.

The invention relates to the field of internal combustion engines, and provides a hydrogen ejector and an internal combustion engine combustion system. The lengthened spraying pipe is arranged at the end, close to the first hydrogen spraying opening, of the hydrogen spraying device body, extends in the axial direction of the hydrogen spraying device body and is provided with a second hydrogen spraying opening; the heat insulation pin is arranged in the lengthened spraying pipe and located between the first hydrogen spraying opening and the second hydrogen spraying opening, the heat insulation pin is provided with a through hole formed in the axial direction of the heat insulation pin, one end of the through hole communicates with the first hydrogen spraying opening, and the other end of the through hole communicates with the second hydrogen spraying opening. In this way, an existing hydrogen ejector can be improved, and the manufacturing and design cost is greatly reduced. Meanwhile, the lengthened spraying pipe is utilized, the spraying opening of the hydrogen ejector body can be far away from a high-temperature and high-pressure area, the thermal load problem and the installation problem of the hydrogen ejector are effectively solved, the service life of the hydrogen ejector is prolonged, and efficient, reliable and stable operation of an engine can be achieved easily.

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 discloses a thermo-acoustic oscillation passive control axial grading combustion chamber which comprises a fuel gas distribution pipe, a head gas distribution cavity, a cooling end plate, a weak rotation micro-mixing on-duty nozzle, a direct injection micro-mixing main combustion nozzle, an axial grading nozzle, a flame tube, a flow guide bushing and an outer casing. Due to the combustion arrangement of head micro-mixing combustion and axial staged combustion, fuel gas distribution is optimized; the ignition / load-per-liter combustion stability of the combustion chamber is realized through the weak-rotation micro-mixing on-duty nozzle; the axial grading nozzle adopts a lobe structure to enhance fuel and air mixing; the cooling hole structure of the axial grading nozzle is optimized, and the effect of restraining thermo-acoustic oscillation is achieved; and the opening positions of the axial grading windward side and leeward side cooling holes are improved, so that flame lifting under the high-hydrogen-content fuel is realized. According to the axial grading combustion chamber arrangement mode, the residence time of smoke in a high-temperature area is shortened, NOx pollutant emission of the combustion chamber is reduced, and the requirement for efficient, stable and low-emission operation under the condition of high-hydrogen-content fuel is integrally met.

When the ratio of fuel gas (G) to combustion air (Air) supplied to a burner (20) is adjusted by an air ratio control system (50) and the fuel gas and the combustion air are ejected from the burner into a furnace (10) for combustion, a change in oxygen concentration in the furnace caused by a change in air entering the furnace is detected by an oxygen concentration sensor (51). The oxygen concentration in the furnace detected by the oxygen concentration sensor is output from the output control device to the air ratio control system, and the ratio of combustion air and fuel supplied to the burner is adjusted by the air ratio control system.

The invention discloses a thermal power deep peak regulation system and method based on ammonia cracking hydrogen production coupling waste heat deep utilization, and relates to the field of thermal power generation, the thermal power deep peak regulation system comprises a gasifier, an ammonia cracking hydrogen production device, a cooler, a separator, an ammonia storage tank, an ammonia hydrogen storage system, a peak regulation combustor and a boiler. The waste heat of the thermal power boiler is utilized to gasify liquid ammonia to form gas ammonia, the ammonia cracking hydrogen production device utilizes medium-high temperature waste heat or electric energy and an ammonia cracking catalyst to crack part of ammonia gas to generate ammonia-hydrogen-nitrogen mixed gas, and the ammonia-hydrogen mixed gas is obtained through separation of the separator. The ammonia-hydrogen mixed gas and ammonia gas are mixed to generate mixed gas with different ammonia-hydrogen proportions, the mixed gas is stored in an ammonia-hydrogen storage tank, and the ammonia-hydrogen proportions used for the combustor are adjusted according to different loads to maintain stable combustion. Stable combustion of the combustor can be maintained under the low load, deep peak regulation of thermal power is achieved, waste heat of the thermal power can be deeply utilized, and the power generation efficiency is improved.

The present invention discloses a gas low-nitrogen burner and a combustion method that couples barrier wind with staged combustion. Through the three-dimensional arrangement of gas, air and barrier wind nozzles, air, gas and 20% to 25% of recycled flue gas are evenly divided into three stages as barrier wind and delivered into the furnace. The barrier wind can delay the direct contact between air and gas, so that the gas is fully mixed with the air before ignition and is evenly diluted by the barrier wind, thereby achieving uniform combustion and uniform temperature field in the space. At the same time, the barrier wind can also reduce the oxygen partial pressure, absorb the released heat, and reduce local high-temperature areas; in addition, through the three-dimensional arrangement of gas and air and the reasonable step-by-step distribution of gas and air into the furnace, the high-temperature combustion area is controlled to create a reducing atmosphere, even in the presence of NO x The present invention couples the barrier wind and staged combustion technology to reduce the NO x The emission concentration is reduced to less than 30mg / Nm 3 It is suitable for newly built or existing low-nitrogen gas boiler projects and has broad application prospects.

The present invention relates to a cylindrical atmospheric burner and a gas water heater. The cylindrical atmospheric burner comprises a base, a first body, a first diverter tube, a second body and an ejector. A first mixing chamber and a second mixing chamber are provided on the base at intervals. The first body is mounted on the base, and the second body is stacked on the first body. Since the mixed gases respectively introduced into the first mixing chamber and the second mixing chamber will eventually flow out from different height positions, the user's needs for different load combustion are effectively met, and the segmented combustion of the burner is realized. The cylindrical atmospheric burner cleverly changes the flow direction of the mixed gas flow by means of a built-in first diverter tube, thereby realizing cylindrical stratified combustion and overcoming the problem of excessive temperature rise of the whole water heater under low load. The cylindrical atmospheric burner has multiple mixing chambers and diverter chambers built in to ensure that the gas and air are fully mixed before flowing out, so that the flame combustion is more stable, which is conducive to improving the user's experience of the whole water heater.

The invention relates to a control method and device for a low-pressure EGR system, a vehicle and a storage medium, and the method comprises the steps that gas parameters of at least one preset gas detection point of the low-pressure EGR system of the vehicle are obtained, and the liquid water amount of the low-pressure EGR system is calculated based on the gas parameters; current driving parameters of the vehicle are obtained, and the engine working condition of the vehicle is determined based on the current driving parameters and the gas parameters; based on the liquid water volume and the engine working condition, whether the vehicle meets the preset combustion stability condition or not is judged, under the condition that the vehicle does not meet the combustion stability condition, the target opening degree of an EGR valve in the low-pressure EGR system is determined based on the liquid water volume and the engine working condition, and the EGR valve is controlled to be opened to the target opening degree so as to meet the combustion stability condition. Therefore, the technical problems that in the related technology, due to the fact that condensate water is consumed or separated by arranging an additional device, the cost is high, additional space design needs to be conducted on the interior of the vehicle, and certain potential safety hazards exist are solved.

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.

The invention discloses an ultra-low load grid nozzle center strong ignition fuel-rich burner, and belongs to the technical field of burners. The problem that an existing burner structure cannot guarantee stable and continuous powder supply of a boiler under ultra-low load, and consequently stable ignition and combustion of pulverized coal cannot be guaranteed is solved. Comprising an elbow, a cylinder and a square pipe which are sequentially communicated and fixedly connected end to end, a negative pressure nozzle penetrates through the cylinder, the inlet end of the negative pressure nozzle faces the elbow, the negative pressure nozzle penetrates through the cylinder in an axial sliding mode through an adjusting assembly, a concentrated powder pipe is fixedly arranged in the square pipe, and the outlet end of the concentrated powder pipe is fixedly connected with a grid nozzle in a communicated mode. And by arranging the negative pressure nozzle, the adherence effect when the pulverized coal passes through the elbow is effectively solved, and the pulverized coal is concentrated towards the middle under the action of negative pressure. Real-time adjustment of the ratio of the thick pulverized coal to the thin pulverized coal is achieved by simply adjusting the position of the negative pressure nozzle, and therefore it is guaranteed that the boiler can still supply pulverized coal stably and continuously when the load is ultra-low, and stable ignition and combustion of the pulverized coal are guaranteed.

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 relates to the technical field of boiler combustion control, and discloses a boiler intelligent combustion optimization control system and method, and the system comprises a judgment module which is used for obtaining boiler combustion thermal imaging data, determining a combustion stability coefficient of a current boiler according to the boiler combustion thermal imaging data, and outputting the combustion stability coefficient; judging whether combustion optimization is needed or not according to the combustion stability coefficient of the current boiler; the strategy module is used for obtaining current boiler operation data and operation load if combustion optimization is needed, and determining a current combustion optimization strategy according to the current boiler operation data and operation load; and the optimization module is used for determining a standard stability coefficient according to the current combustion optimization strategy and determining a final combustion optimization strategy according to the standard stability coefficient and the combustion stability coefficient of the current boiler. The combustion state of the boiler in the operation process can be accurately monitored, and the combustion optimization strategy is formulated in time according to the combustion state, so that the boiler can keep stable combustion.

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 invention provides an incineration system and method for coal gasification slag, and belongs to the field of solid waste treatment.The system comprises a stock bin, a drying and granulating device, a screening device, combustion equipment, an air pre-heater and a tail gas treatment device; the gasification fine slag and the gasification coarse slag are mixed through the stock bin, and a mixed material is obtained; the drying and granulating device is used for drying and granulating the mixed material; the screening device screens the dried and granulated materials to obtain a first screened material with the particle size larger than a preset particle size value and a second screened material with the particle size not larger than the preset particle size value, the first screened material is conveyed to combustion equipment to be incinerated, and the second screened material is conveyed to a stock bin; the air pre-heater is used for recovering heat of flue gas discharged by the combustion equipment and conveying the treated flue gas to the tail gas treatment device; and the tail gas treatment device performs waste gas purification treatment on the flue gas. By applying the system, the calorific value of the coal gasification slag material can be increased, the particle size of material particles is increased, and stable combustion of the material is promoted.

The invention relates to the technical field of gas stoves, and discloses a burner cap assembly, a burner and a gas stove. The fire cover assembly comprises fire covers, fire holes are formed in the fire covers, the fire holes penetrate through the top walls of the fire covers and the side walls of the fire covers in the radial direction of the fire covers, the multiple fire covers are sequentially arranged at intervals in the direction from inside to outside, multiple secondary air holes are formed between the adjacent fire covers and are sequentially arranged at intervals in the circumferential direction of the fire cover assembly, and the secondary air holes are communicated with the fire covers. And the fire holes of the adjacent fire covers are communicated with the secondary air holes. The fire holes penetrate through the top wall and the side wall of the fire cover in the radial direction of the fire cover, stable combustion of flames at the fire holes is facilitated, and the phenomenon of flame separation is avoided. The multiple secondary air holes are formed between the adjacent fire covers, secondary air can be accurately supplemented for the fire holes, the fire holes penetrate through the fire covers in the radial direction of the fire covers, the influence of the secondary air on the temperature uniformizing effect can be reduced, and therefore the efficient heat transfer and temperature uniformizing heating effect is achieved.

The moxibustion head shell of the smoke purification moxibustion instrument comprises an inner shell, an outer shell and a connecting plate connected between the inner shell and the outer shell, a moxibustion material combustion chamber, a moxa smoke primary filtering chamber and a secondary filtering chamber are sequentially arranged in an inner cavity of the inner shell from bottom to top, and a backflow chamber is defined between the outer shell and the inner shell; the top of the inner shell is provided with an extraction opening, the lower end of the inner shell is provided with an air inlet, and the lower end of the outer shell is provided with an air vent; the outer side wall of the flow dividing piece is provided with an upper flow guiding face used for guiding airflow into the air inlet and a lower flow guiding face used for guiding airflow out of the air vent. The utility model further discloses a moxibustion head assembly of the smoke purifying moxibustion instrument. The moxibustion head assembly comprises the moxibustion head shell, a primary smoke filtering block, a secondary smoke filtering block and an air exhaust fan. According to the moxibustion instrument, airflow turbulence at the air vent is reduced through the flow dividing piece, it is guaranteed that smoke circulation is fully purified, the influence of the external environment on moxibustion material combustion is avoided, and the stability of smoke purification and moxibustion temperature control of the moxibustion instrument can be improved.