175results about How to "Reduce heat load" patented technology

The invention further discloses a preparation method of the wide-temperature-range, high-performance and high-binding-force soft and hard composite coating. The preparation method comprises the steps of cleaning, ion implantation, preparation of a soft layer metal Ti, preparation of a hard layer TiZrAlCrSiMN, preparation of a soft layer metal Zr and preparation of the hard layer TiZrAlCrSiMN. The invention further discloses application of the wide-temperature-range, high-performance and high-binding-force soft and hard composite coating in a dry cutting tool. The invention discloses the wide-temperature-range high-performance high-binding-force soft and hard composite coating which is prepared through the preparation method, and the wide-temperature-range high-performance high-binding-force soft and hard composite coating solves the problems that an existing tool coating is low in high-temperature hardness, poor in abrasion resistance and poor in erosion resistance and cracking resistance.

The invention discloses a multistage self-adaptive enhanced mixing device for a solid fuel ramjet engine, which belongs to the technical field of solid fuel ramjet engines and comprises a front flange, a rear flange, an afterburning chamber barrel, a mixing partition plate, a heat insulating layer, a pressure measuring seat and a temperature measuring seat. The front flange and the rear flange are welded with the afterburning chamber barrel, a water pressure test is carried out after welding is completed, the mixing partition plates are bonded to the inner wall of the afterburning chamber barrel through high-temperature-resistant glue, and the mixing partition plates are distributed in a multi-stage mode, are separated through a heat insulation layer and are bonded through the high-temperature-resistant glue. In order to verify the effect of the multi-stage self-adaptive enhanced mixing device for the solid fuel ramjet engine, a pressure measuring point and a temperature measuring point are arranged on an afterburning chamber barrel and a mixing partition plate; according to the multi-stage self-adaptive enhanced mixing device, the combustion efficiency of a solid fuel ramjet can be remarkably improved, and the efficiency is further improved along with the increase of the number of the mixing partition plates.

The invention discloses a novel low-cost high-entropy ceramic coating with a composite structure. The novel low-cost high-entropy ceramic coating comprises a supporting layer, a transition layer and a functional layer which are sequentially deposited, wherein the supporting layer comprises a TiZrAlCrSi layer and a TiZrAlCrSiN layer which are sequentially deposited, the transition layer comprises a TiZrAlCrSiN layer and a TiZrAlCrSiMN layer which are periodically and alternately deposited, and the functional layer comprises a TiZrAlCrSiMN layer; the invention further discloses a preparation method of the novel low-cost composite-structure high-entropy ceramic coating. The preparation method comprises the processes of cleaning, ion implantation, deposition of the supporting layer, deposition of the transition layer and deposition of the functional layer. The invention further discloses application of the novel low-cost composite-structure high-entropy ceramic coating in a superhard tough high-temperature-resistant tool. The novel low-cost composite-structure high-entropy ceramic coating provided by the invention solves the problems of low high-temperature hardness, poor wear resistance, weaker cracking resistance and the like of the existing cutter coating.

The invention discloses a photovoltaic and photo-thermal comprehensive utilization system based on tower type photo-thermal power station optimization, and belongs to the technical field of power generation. According to the invention, by optimizing the structure of the concentrating tower, the original traditional scheme of directly concentrating light to a heat receiver from a reflecting mirror field is optimized into a two-stage reflection design, that is, the reflecting mirror field is used as first-stage reflection, the position of a frequency division film is used as second-stage reflection, and a photovoltaic cell and the frequency division film are placed at the second-stage reflection position. A frequency division film is plated on the surface of a photovoltaic cell panel, so that visible light high-grade energy wave band transmission and absorption are improved, reflection of visible light and low-grade infrared light to a certain degree is maintained, normal operation of a condensation type photo-thermal system is guaranteed, spatial separation of high-grade visible light photon energy and low-grade near-infrared light photon energy is completed, and the energy efficiency is improved. Therefore, frequency division utilization of solar energy is achieved, solar energy utilization is achieved in a mode of combining a photovoltaic system and a photo-thermal system, and the power generation efficiency is improved. The system is suitable for solar power generation combining a photovoltaic system and a photo-thermal system.

The invention relates to an oil-containing sludge hydro-thermal treatment energy efficient utilization system and an operation method thereof, and the system comprises a preheating fluidization part which is used for preheating a fluidization material; the steam heating part is used for heating the materials and participating in the hydrothermal reaction; the steam heating part is used for supplying high-temperature steam to the hydrothermal reaction part so as to carry out material heating and hydrothermal reaction, and flash evaporation is carried out after the hydrothermal reaction; the condensing medium flows into the steam heating part after being heated; the gas from the preheating fluidization part is cooled and condensed to form low-temperature flash condensate; the flash tank is used for mixing to form a flash destabilized mixture; and the centrifugal separation part is used for centrifugally separating the flash destabilized mixture from the flash tank. The heat load and the cooling load of system operation are reduced, and energy conservation and consumption reduction are achieved; and the low-temperature flash evaporation condensate is mixed with the materials in the flash evaporation tank, so that the oil content of the residual solid phase after centrifugal separation is further reduced, the volatilization of light petroleum components in the condensate is reduced, and the safety and pollution risks are reduced.

The invention discloses an ultralow-temperature liquid intrusive pressure sensor calibration system and method and a sensor. The system comprises a vacuum heat insulation cavity, a temperature control cavity assembly, a pressure control cavity assembly, a pressure control gas assembly, a standard differential pressure gauge and a test cavity assembly. Wherein the temperature control cavity assembly comprises a temperature control cavity; the pressure control cavity assembly comprises a pressure control cavity, a pressure control cavity liquid inlet pipeline and a pressure control cavity exhaust pipeline; the pressure control cavity comprises an upper cavity body, a long neck tube and a lower cavity body; two ends of the long-neck tube are respectively communicated with the upper cavity and the lower cavity; the temperature control cavity and the pressure control cavity are located in the vacuum heat insulation cavity, the temperature control cavity wraps the lower cavity, and the test cavity assembly is connected with the lower cavity; a pressure control cavity liquid inlet pipeline, a pressure control cavity exhaust pipeline and a pressure control gas assembly penetrate through the vacuum heat insulation cavity and then are communicated with the upper cavity; the standard differential pressure gauge is connected with the upper cavity, a pressure control cavity pressure sensor is arranged on the pressure control cavity liquid inlet pipeline, the gas pressure intensity and the liquid pressure intensity of the gas space in the upper cavity are respectively tested according to the standard differential pressure gauge and the pressure control cavity pressure sensor, and the sum of the gas pressure intensity and the liquid pressure intensity serves as calibration comparison pressure; according to the invention, the influence of gas-liquid mixing relative output pressure can be avoided, and different pressure calibration tests of fixed-point temperature maintenance can be realized so as to meet the research and calibration requirements of the ultralow-temperature liquid intrusive pressure sensor.

The invention relates to the technical field of environmental protection, and discloses a thermal power plant smoke dust treatment device which comprises a bottom plate, a filter box is fixedly connected to the top of the bottom plate, an air inlet pipe is fixedly connected to the left side of the filter box, a fan is fixedly connected to the top of the bottom plate, and an air suction pipe is fixedly connected between the fan and the filter box. According to the system, heat in the flue gas can be effectively recycled through the treatment mechanism to heat water in the water storage tank, so that the energy utilization efficiency of the whole system is improved, energy waste is reduced, the production cost is reduced, the requirement for additional energy can be reduced by recycling the heat in the flue gas, and the energy utilization rate of the system is improved. The device is simple in structure and convenient to operate, emission of greenhouse gas and other pollutants can be reduced, the environment-friendly requirement for energy conservation and emission reduction is met, meanwhile, heat of the flue gas is transmitted to water in the water storage tank, the temperature of the flue gas can be reduced, heat loads on follow-up flue gas treatment equipment can be reduced, the service life of the equipment is prolonged, and the maintenance cost of the equipment is reduced.

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 liquid hydrocarbon fuel combustion equipment and a supercritical carbon dioxide circulation system, the liquid hydrocarbon fuel combustion equipment comprises a nozzle, a combustion chamber and a rotational flow assembly, the rotational flow assembly comprises a first-stage pipe, a second-stage pipe, a first-stage cyclone, a second-stage cyclone and a third-stage cyclone, and the first-stage pipe and the second-stage pipe are both scaling venturi pipes. The supercritical carbon dioxide circulation system comprises fuel supply equipment, pure oxygen supply equipment and a circulation assembly, mixed gas of carbon dioxide and water vapor generated by combustion of the liquid hydrocarbon fuel combustion equipment is circulated through the circulation assembly to obtain high-purity carbon dioxide, and the high-purity carbon dioxide is divided into three paths to flow into a first-stage swirler, a second-stage swirler and a third-stage swirler; the carbon dioxide flowing into the second-stage cyclone is uniformly mixed with oxygen from pure oxygen supply equipment before flowing into the second-stage cyclone. The combustion ignition delay period and the mixing time can be prolonged, a standing vortex high-temperature rapid reaction area is formed, the problem that the combustion speed is low in the concentrated carbon dioxide atmosphere is solved, and the supercritical carbon dioxide circulation efficiency is improved.

The invention relates to the technical field of suction dryers, in particular to a waste heat suction dryer with hot water recovery, which comprises a primary cooler, a hot water recovery heat exchanger, an auxiliary electric heater, a secondary cooler, an adsorption tower A and an adsorption tower B which are arranged on the surface of a suction dryer body, the device has the beneficial effects that the drying agent is regenerated by waste heat generated in the compression process of the compressor in the drying machine body, compressed air is not consumed in the heating regeneration process, the energy consumption of the whole adsorption and regeneration process is close to zero, and meanwhile, high-temperature heat of the compressed air is fully utilized to directly enter the regeneration adsorption layer; and the high-temperature heat is absorbed by the adsorbent, so that the heat load of the rear primary cooler is reduced, the consumption of cooling water is correspondingly reduced, the compression heat has an energy-saving characteristic, and effective energy conservation can be realized to the greatest extent.

The invention provides a fuel support plate injection device of an external injection type oblique detonation engine, which comprises a support plate arranged in front of a first-stage compression shock wave of a two-dimensional air inlet channel, and the support plate comprises a front edge passivated wedge body close to the upstream of incoming flow gas, a middle equal straight section cuboid, and a rear edge passivated wedge body close to the downstream of the incoming flow gas; a first cooling channel is arranged at the front part of the support plate, and a second cooling channel is arranged at the rear part of the support plate; the front edge of the supporting plate is provided with an injection slit directly connected with the first cooling channel, and the rear edge of the supporting plate is provided with a plurality of injection holes directly connected with the second cooling channel.

The invention discloses a cement hot raw material desulfurization process and a desulfurization device. The desulfurization process comprises the following steps: (1) taking out a high-temperature solid hot raw material from a C5-grade cyclone blanking pipe; (2) mixing the taken-out high-temperature solid hot raw material with air flow for primary cooling; (3) carrying out gas-solid separation on the hot raw material mixed with the gas, and carrying out secondary cooling by using atomized water to obtain a low-temperature hot raw material; (4) metering the obtained low-temperature hot raw material, adding the low-temperature hot raw material into a digester, and carrying out digestion reaction on the low-temperature hot raw material and digestion water in the digester to generate calcium hydroxide; (5) conveying the digested material into a powder bin for temporary storage; and (6) metering the material temporarily stored in the powder bin, adding the material into a first air pipe from the C2 cyclone separator to the C1 cyclone separator, and carrying out desulfurization treatment. The process method provided by the invention has the advantages of small influence on a preheater system, low energy consumption, high desulfurization efficiency, small use amount of a desulfurizing agent and stable desulfurization effect, and can adapt to a working condition with relatively large SO2 concentration fluctuation.

According to the gas turbine blade based on the partitioned composite cooling structure, a plurality of different cooling channels are arranged in a blade body in a partitioned mode, and the cooling channels mainly comprise double-layer S-shaped ribs in the front edge area of the blade, double-layer wedge-shaped matrix ribs in the middle chord area of the blade and double-channel exhaust grooves in the tail edge area of the blade; air film holes are longitudinally formed in the peripheral wall of the outer layer of the thin wall corresponding to the positions of the double-layer S-shaped ribs and the double-layer wedge-shaped matrix ribs; jet holes are longitudinally formed in the circumferential wall of the solid inner layer, and cooling gas passing through the double-layer S-shaped ribs and the double-layer wedge-shaped matrix ribs is jetted to the inner wall face of the thin-wall outer layer through the jet holes. The overall heat exchange area in the turbine blade is increased, turbulence is enhanced, and boundary layer disturbance of airflow is increased; cold air is introduced from the interior or the periphery of the blade through the air film holes and sprayed to the surface of the blade to form an air film, direct contact between high-temperature airflow and the surface of a blade material is isolated, and therefore the thermal load on the surface of the blade is reduced, and the cooling effect of cooling gas on the high-temperature blade is improved.

This application discloses a control method for a vehicle air conditioning system, including acquiring the current number of passengers in the target vehicle, external ambient humidity information, in-vehicle temperature information, and air conditioning system operating parameter information; analyzing the dehumidification capacity of the air conditioning system based on the external ambient humidity information and in-vehicle temperature information to obtain first dehumidification data; analyzing the fresh air volume demand based on the first dehumidification data and the current number of passengers to obtain air volume demand data; analyzing the air conditioning system control parameters based on the air volume demand data, the first dehumidification data, the current number of passengers, and the air conditioning system operating parameter information to obtain target control parameters for the air conditioning system; and controlling the operation of the air conditioning system of the target vehicle based on the target control parameters. The vehicle air conditioning system control method of this application can reduce the overall vehicle heating load without causing fogging in the target vehicle, thereby achieving energy-saving, fog-free heating in the target vehicle.

The utility model discloses a fractional slot concentrated winding, a stator and a fault-tolerant motor, which comprise coils arranged in stator slots, the pitch of the coils is 1, the coils comprise working coils and backup coils, the working coils and the backup coils are distributed at intervals, and the working coils and the backup coils are sequentially arranged left and right. According to the fractional-slot concentrated winding structure, the coils can be uniformly distributed to each stator tooth, the coil inserting difficulty is reduced, the utilization rate of the stator slots is improved, and the copper loss of a fault-tolerant motor is reduced. Moreover, the working coil and the backup coil are arranged left and right, and the isolation space is increased compared with the vertical arrangement, so that the thermal isolation between the two sets of windings is increased, and the reliability of the fault-tolerant motor is further improved.

The invention provides a semiconductor refrigerator and a Dewar assembly, and relates to the technical field of refrigeration infrared detectors, the semiconductor refrigerator comprises a cold end and a hot end, the cold end and the hot end are connected through a PN junction, and one side, away from the hot end, of the cold end is provided with at least one layer of solidified water vapor structure; the water vapor curing structure comprises a plurality of trapezoidal grooves extending towards the interior of the cold end, and a protrusion is formed between every two adjacent trapezoidal grooves. The beneficial effects are that water vapor can be induced to be solidified in advance at the installation position of the semiconductor cooler in the Dewar, and solidified water is trapped in the solidified water vapor structure and is prevented from escaping in the operation vibration process of the infrared detector, so that chip imaging is prevented from being interfered; the semiconductor refrigerator can work independently and conduct refrigeration in advance according to requirements, cooling capacity is provided independently, and the heat load of the chip refrigerator is reduced. In the getter activation process, heat can be prevented from being conducted to the chip through the ceramic lead ring and the supporting rod, and chip over-temperature failure is effectively avoided.

The utility model discloses a silent variable frequency generator set engine wind scooper air inducing structure which comprises a wind scooper, a wind scooper air inlet is formed in the wind scooper, and the outer edge of the wind scooper and the wind scooper air inlet form a main air channel in the circumferential direction. A first air duct, a second air duct and a third air duct which are communicated with the main air duct are arranged at the air outlet position of the main air duct. The single-impeller multi-air-duct heat dissipation device has the advantages that on the basis that the structure is simplified and the cost is reduced, single-impeller multi-air-duct heat dissipation is achieved, cooling air is divided and guided, heat dissipation is conducted on different positions of an engine, the heat dissipation effect of the engine is improved, the heat load of the engine is reduced, and the user experience and the service life of the engine are guaranteed.

The application relates to a partition-injection air-bleed circulation combustion chamber and a liquid rocket engine, wherein the partition-injection air-bleed circulation combustion chamber comprises a combustion chamber body and a partition-injection injector; the combustion chamber body is provided with an oxygen inlet collector, a fuel inlet collector and an air-bleed collector; the partition-injection injector is installed on the upper end of the combustion chamber body and is provided with injection holes; the oxygen inlet collector and the fuel inlet collector are communicated with the partition-injection injector and inject oxidants and fuels into the combustion chamber body through the partition-injection injector; the air-bleed collector is installed on the outer side of the middle part of the combustion chamber body and is communicated with the combustion chamber body; the partition-injection injector is disc-shaped and is divided into an equivalence zone, an oxygen-rich zone and a fuel-rich zone from the center to the outside; a partition ring is fixed to the lower surface of the partition-injection injector; the partition ring is in the form of a ring cylinder structure; the partition ring is located between the oxygen-rich zone and the fuel-rich zone and is used for separating the oxygen-rich zone and the fuel-rich zone.

The invention discloses a slice laser based on a topological structure dodging layer. The slice laser comprises a pumping system, a pumping light injection module and a composite dodging waveguide structure, pumping light generated by the pumping system enters the composite dodging waveguide structure through the pumping light injection module; the front end face of the composite dodging waveguide structure is plated with a pumping light wavelength high-reflective film and a laser wavelength antireflection film, and the rear end face of the composite dodging waveguide structure is plated with a pumping source wavelength and laser wavelength high-reflective film; the composite dodging waveguide structure comprises a slice gain medium, a topological structure dodging layer and a middle refractive index layer which are sequentially arranged from the front end face to the rear end face. The topological structure dodging layer is composed of a low-refractive-index material layer and a high-refractive-index material topological graph arranged on the low-refractive-index material layer; and the pump light injection module is fixed above the high refractive index material of the middle refractive index layer or the topological structure dodging layer. Pumping uniformity is improved fundamentally, high-order mode suppression and efficient fundamental mode extraction are facilitated, and output power and light beam quality are improved at the same time.

The invention provides an evaporation precooling type cooling tower water saving system and method, and relates to the technical field of cooling towers, the evaporation precooling type cooling tower water saving system comprises an evaporator, the evaporator comprises a tank body and a heat exchange pipe, a heat exchange cavity is formed in the tank body, the heat exchange pipe is used for being connected with a water source to be cooled, and a heat exchange section extending into the heat exchange cavity is arranged between the two ends of the heat exchange pipe; the condenser comprises a condensation pipe and a fan, the condensation pipe is of a snakelike bent structure, one end of the condensation pipe is connected to the top of the heat exchange cavity through an ascending pipe, the other end of the condensation pipe is connected to the bottom of the heat exchange cavity through a descending pipe, and the fan is installed at the position of the snakelike bent structure of the condensation pipe. By arranging a system composed of the evaporator, the condenser and other components, cooling water passes through the heat exchange section to exchange heat with the circulating working medium in the tank body before entering the cooling tower, evaporation precooling is achieved, the effect of reducing the heat load of the cooling water entering the tower is achieved, therefore, evaporation loss can be reduced, and finally water saving is achieved.

The utility model relates to the technical field of machining tools, and discloses a spiral reamer for machining bakelite, which comprises a reamer handle, a cutting part is arranged at one end of the reamer handle, a guide tip is arranged at the end of the cutting part, main guide cutting edges and auxiliary cutting edges are laterally arranged on the cutting part, a scrap discharging groove is arranged between the two main guide cutting edges, and the scrap discharging groove is communicated with the auxiliary cutting edges. The edge of the guide main cutting edge is provided with a cutting taper, the cutting taper is 2 degrees, and due to the design of the taper, the cutter is more stable in the cutting process, vibration is reduced, the abrasion resistance of the cutter is improved, and the service life of the cutter is prolonged. The cylindrical edge strip with the width of 0.12 mm can play a supporting role in the cutting process, friction between the cutter and a workpiece is reduced, heat generation is reduced, and therefore abrasion is reduced, and the service life of the cutter is prolonged.

This invention discloses a vibration damper for an afterburner with an insertion tube, belonging to the design field of afterburners. It includes a vibration damper, a flame stabilizer, and a central cone. The vibration damper is located at the downstream end of the outer bypass channel, closely attached to the inner wall of the afterburner shell, forming a double-wall structure. Cold air from the outer bypass flows through it, cooling the wall surface and absorbing oscillation energy, thus suppressing high-frequency vibrations in the combustion chamber. The flame stabilizer is located in the inner bypass channel, its inner end connected to the central cone. The inner bypass and part of the outer bypass airflow meet here, forming a low-speed recirculation zone, achieving fuel-air mixing and stable ignition. The vibration damper has openings, employing a deep-hole structure with an insertion tube. The insertion tube is placed within a hole in the vibration damper's base, significantly increasing the equivalent neck length of the vibration damper while maintaining the same main plate thickness. This shifts the peak sound absorption frequency towards lower frequencies, improving the vibration damper's absorption capacity for low-frequency oscillation modes in the afterburner.

The invention provides a low-pass filter for quantum bits. The low-pass filter comprises a ground wire; the transmission line is used for transmitting an input control signal in a preset frequency range; the first ends of the capacitors are connected with the ground wire, and the second ends of the capacitors are connected with the transmission line; a plurality of first inductors, wherein one first inductor is arranged on the transmission line between two adjacent capacitors; wherein under the condition that the input control signal is input into the input end of the transmission line, the output end of the transmission line outputs a first output control signal and a second output control signal through the response mode of the low-pass filter, and the frequency of the first output control signal is higher than that of the second output control signal.

The utility model relates to the technical field of low-temperature air dehumidification, and discloses a low-temperature air dehumidification device for a vehicle low-temperature simulation test, which comprises an air compressor and a heat exchanger, the air compressor is provided with an air inlet and an air outlet, the heat exchanger is provided with a low-temperature air inlet and a low-temperature air outlet, and the low-temperature air outlet is communicated with the air inlet. The heat exchanger is provided with a high-temperature air inlet and a high-temperature air outlet, and the high-temperature air inlet is communicated with the air outlet, so that the air enters the heat exchanger after being compressed and heated by the air compressor. When the low-temperature air dehumidification device works, the situation that a regeneration area needs to be heated is avoided, meanwhile, low-temperature air in the whole environment bin does not need to be replaced, the low-temperature air does not need to be heated to the normal temperature, then fresh air does not need to be replaced to the low humidity, and finally the temperature is reduced to the low temperature, and huge energy consumption in the whole circulation process is reduced; the cost of the low-temperature simulation test of the vehicle is reduced.

The present application provides an aircraft waste heat driven absorption type dual temperature ring controlled refrigeration system and method. The system includes a generator, the generator includes a first inlet, a second inlet and a first outlet, the first inlet receives a reaction solution, the second inlet receives waste heat generated by the operation of the aircraft main engine, the reaction solution in the generator and the waste heat undergo a wall-type heat exchange to generate a first state refrigerant; the first outlet is connected to a first temperature evaporator, receives a second state refrigerant, and outputs a third state refrigerant, the purity of the second state refrigerant is greater than that of the first state refrigerant, and the third state refrigerant includes refrigerants in different forms; the first temperature evaporator is connected to the second temperature evaporator inlet, and the liquid phase refrigerant in the third state refrigerant is extracted and input into the second temperature evaporator to generate a second temperature refrigeration capacity, wherein the first temperature is higher than the second temperature; the refrigerant output from the second temperature evaporator and the gas phase refrigerant in the third state refrigerant are mixed in the absorber to generate a reaction solution.

This invention discloses a porous rectifying structure for the afterburner of a variable cycle engine, comprising a rectifying orifice plate installed in an annular channel between the turbine outlet and the flame stabilizer. The orifice plate is symmetrically arranged along its radial central axis, with the clogging area facing the turbine inflow and axially aligned with the heat shield inlet. The orifice plate height is 2 / 3 of the channel height between the central cone and the heat shield. The plate has uniformly distributed pores with an equivalent diameter of 10-20 mm along the radial direction, with a clogging ratio of 5%-25%. This invention forms a multi-stage mixing interface through the radially gradient porosity pore arrangement, promoting shear mixing of the high-temperature internal combustion gas and the external bypass gas. Simultaneously, the static pressure difference across the orifice plate drives the external bypass gas flow into the heat shield cooling channel, increasing the cooling flow rate, improving the uniformity of the upstream velocity field of the flame stabilizer, eliminating the recirculation zone inside the heat shield, reducing the thermal load on the casing wall, and controlling the total pressure loss to within 3%, achieving high-stability combustion and reliable thermal protection under a wide bypass ratio.

The invention relates to high-temperature solid anaerobic fermentation equipment matched with gas pulse stirring, which comprises a closed box body, the interior of the closed box body is vertically divided into a fermentation space and a heating space by a transmission device, and the top of the fermentation space is provided with a feed pipe and an exhaust port which are provided with valves; the top of the feeding pipe is located outside, the bottom of the feeding pipe is located above the material level of the fermentation space, a plurality of gas pulse devices used for stirring materials in an air-blowing mode are communicated with the position, above the transmission device, in the fermentation space, and a discharging device for discharging solid materials is further arranged on one side of the bottom of the fermentation space; the heating space is used for receiving biogas slurry discharged from the fermentation space, a heating device is arranged in the heating space, and the heating space is communicated with the fermentation space through a pump set. According to the equipment, a high-temperature environment of solid anaerobic fermentation can be maintained on the basis of greatly reducing energy consumption, meanwhile, slag and liquid are convenient to separate, the loss of microbial colonies is small, dynamic and stable operation of anaerobic fermentation is ensured, and the proportion of methane in obtained biogas is increased.

This invention discloses an end-face coated crystal optical element for a laser resonator and its fabrication method, belonging to the field of optical element fabrication. It includes an optical crystal, a high-reflectivity film disposed on one end face of the optical crystal, and a partially transmissive film disposed on the other end face. The high-reflectivity film sequentially includes Y-coatings along the end face of the optical crystal outwards. b F3 First Floor, H f O2 first layer, Y b F3 Second Layer, H f O2 second layer...Y b F3, Q layer, H f O2, Q layer. This invention utilizes Y... b 3+ Sensitization improves pump absorption efficiency and through Y b To E r Energy transfer effectively alleviates high-doped E r The self-termination effect in YAG lasers enables high efficiency and high energy output of 2940nm lasers, making them suitable for fields such as medical aesthetics and precision machining.

The utility model discloses a device for additionally installing a jet device on a smoke exhaust pipeline of an oil station, which relates to the technical field of smoke exhaust of the oil station and comprises an oil tank and a smoke exhaust pipe, an oil tank smoke exhaust fan is arranged on the smoke exhaust pipe, and a nitrogen jet device control device is further arranged in the smoke exhaust pipe. The nitrogen jet device control device comprises a stainless steel pipe, a reducer pipe joint, an elbow and a welding type regulating valve. The nitrogen jet device can form negative pressure in a pipeline by jetting nitrogen at a high speed, so that oil smoke and harmful gas in the pipeline can be sucked and exhausted more effectively, the smoke exhaust effect is improved, flow field distribution in the pipeline can be improved through the jetting effect of the nitrogen jet device, vortexes and dead angles are reduced, and the smoke exhaust effect is improved. Oil smoke and harmful gas are discharged more smoothly, the possibility of pipeline blockage is reduced, nitrogen ejected by the nitrogen ejector can exchange heat with high-temperature discharged smoke, and therefore the temperature of the discharged smoke is reduced, the heat load on pipeline materials is reduced, and the service life of the pipeline is prolonged.

The invention belongs to the technical field of refractory materials, and particularly relates to a low-thermal-conductivity multi-layer composite magnesium hercynite brick and a preparation method thereof. The preparation method comprises the following steps: by taking 4-ethoxyphenylboronic acid as a modifier, introducing boric acid ester groups on the surfaces of phenolic resin hollow microspheres to prepare boric acid ester modified phenolic resin hollow microspheres; the preparation method comprises the following steps: preparing epoxy-group organic silicon resin from organic silicon resin and epoxy silane, modifying alkaline silica sol by using the epoxy-group organic silicon resin, introducing an organic polymer to the particle surface of the alkaline silica sol to prepare modified silica sol, and mixing the modified silica sol with sodium hexametaphosphate to prepare the composite binder. The high-purity magnesia, the fused magnesia, the fused hercynite, the alpha-Al2O3 micro powder, the metal iron powder, the metal aluminum powder, the composite binder and the borate modified phenolic resin hollow microspheres are compounded, and the prepared multi-layer composite magnesium hercynite brick is low in heat conductivity coefficient and also has excellent mechanical property, high temperature resistance and corrosion resistance.