83results about How to "Lower oxygen levels" patented technology

The utility model provides a bipolar plate welding fixture. The bipolar plate welding fixture comprises a bottom plate; the bipolar plate is pressed between the bottom plate and the pressing plate, the bottom plate and / or the pressing plate are / is provided with an air blowing channel, the bottom plate is provided with a lower air blowing port communicated with the air blowing channel, the pressing plate is provided with an upper air blowing port communicated with the air blowing channel, and the upper air blowing port is communicated with the air blowing channel. And the lower air blowing ports and the upper air blowing ports are arranged towards the bonding wires of the adjacent bipolar plates. According to the utility model, the cooling and oxygen dilution of the upper and lower side surfaces of the welding wire or welding spot area of the bipolar plate can be realized, the condition that the welding wire or welding spot area becomes yellow or blue due to oxidation can be effectively prevented, and the welding quality is ensured.

The utility model relates to the technical field of industrial gas purification and heat energy recovery, and discloses a volatile organic compound-containing gas purification and heat recovery system, which comprises an oxygen supply element, an oxygen dilution device, a raw material gas mixing tank, a heat storage type thermal oxidation furnace, a waste heat recovery device and a purified gas mixing device which are communicated in sequence, wherein the raw material gas mixing tank is provided with an inlet of gas containing volatile organic compounds; and an outlet of the heat accumulating type thermal oxidation furnace is connected with an inlet of the oxygen diluting device and an inlet of the purified gas mixing device. According to the purification and heat recovery system for the gas containing the volatile organic compounds, the gas containing the volatile organic compounds is removed, heat exchange is carried out on cold water in the waste heat recovery device through high-temperature purified gas generated by the heat storage type thermal oxidation furnace, and the energy recovery utilization rate is increased; meanwhile, part of purified gas is returned to the oxygen dilution device, so that the utilization rate of oxygen is increased.

A cotton plucking device for improving the toughness of cotton yarns comprises a raw material bin in the form of a cylinder, a rotating shaft is provided in the middle of the raw material bin, a rotating track is provided on the outside of the raw material bin, and a cotton plucking machine body is provided between the rotating shaft and the rotating track; the cotton plucking machine body comprises a rotating frame, one side of the rotating frame is slidably mounted on the rotating track, and the side of the rotating frame away from the rotating track is movably connected to the rotating shaft; the rotating frame comprises a scattering and adsorption mechanism, and an enhancer input port is provided on the upper part of the scattering and adsorption mechanism. The present application provides a space for the cotton plucking machine body to rotate around the raw material bin by providing a raw material bin and a rotating shaft and a rotating track provided therewith, and by providing an enhancer input port, the enhancer can be attached to the cotton fiber at the most fluffy stage of the cotton, thereby improving the physical properties of the cotton fiber.

The invention discloses a modular combined reactive compensation power distribution cabinet, and relates to the technical field of power distribution cabinets, the modular combined reactive compensation power distribution cabinet comprises a power distribution cabinet body, the front side of the power distribution cabinet body is hinged with a cover plate, and the modular combined reactive compensation power distribution cabinet also comprises assembly fixing plates arranged at two sides of the power distribution cabinet body, and the assembly fixing plates are detachably fixed with the cover plate through bolts. A filter plate used for air inflow is fixedly connected into the assembly fixing plate, a fixing frame is arranged on one side of the filter plate, the fixing frame is fixedly connected with the assembly fixing plate, air is dehumidified through a dehumidification frame in the fixing frame after passing through the filter plate, and drying cotton or drying carbon or materials capable of achieving dehumidification can be arranged in the dehumidification frame. In this way, specific limitation is not made, so that heat dissipation gas entering the power distribution cabinet body does not contain water vapor, and the situation that electrical equipment in the power distribution cabinet body is short-circuited by the gas with moisture during heat dissipation treatment is avoided.

The invention discloses a high-gas mine gob-side entry retaining coal spontaneous combustion and gas comprehensive treatment method which comprises the following steps: arranging a windshield curtain on the side, close to a goaf, of a gob-side entry retaining, and injecting materials into a filling cavity through a filling grouting pipe to form a plugging layer; a closed air chamber is constructed on the side, close to the gob-side entry retaining, of the wind shielding curtain, nitrogen is injected into the gob, meanwhile, gas is safely extracted, and the oxygen concentration is reduced; through multi-stage prevention and control measures, the probability that the working face leaks air to the goaf through the gob-side entry retaining is reduced, the influence of leakage of poisonous and harmful gas in the goaf on mining of the adjacent working face is effectively avoided, harmful gas seepage is reduced, coal spontaneous combustion and gas of the gob-side entry retaining of the high-gas mine are comprehensively treated, and coal mine safety is guaranteed.

The present invention relates to a welding device for processing door panels of new energy vehicles, comprising a base and a positioning plate fixedly installed on the top thereof, a partition plate fixedly installed on the middle part of the front side of the positioning plate, a flip plate hinged on the front end face of the partition plate, a limiting mechanism for fixing a door reinforcement plate is arranged on the flip plate, and a scraping mechanism for cleaning welding slag on the back side of the flip plate is arranged on the front side of the positioning plate on one side of the partition plate; two welding points of the door reinforcement plate are preheated by an electric heating block, thereby reducing welding stress and cracks generated by the door reinforcement plate and avoiding affecting its normal working efficiency; after the two welding points of the door reinforcement plate are preheated, nitrogen is passed through an air intake hose and two air jet pipes and then blown out from the two air jet pipes, thereby reducing the oxygen content around the two welding points of the door reinforcement plate, thereby reducing pores and slag inclusions occurring during welding, and improving the welding quality of the door reinforcement plate.

The invention relates to the technical field of ship engineering, and discloses an anti-explosion pressure relief system for a ship cabin and a control method thereof.The cabin comprises a wall plate provided with a relief opening, and the anti-explosion pressure relief system comprises a sealing gasket annularly arranged on the portion, on the periphery of the relief opening, of the wall plate; the sealing plate abuts against the outer side end of the sealing gasket; the pressing assembly comprises a gas cylinder, a cylinder, a pressure release valve, a first electromagnetic valve and a second electromagnetic valve, the end of a piston rod of the cylinder abuts against the outer side end of the sealing plate, the pressure release valve is arranged in a rodless cavity of the cylinder, the gas cylinder communicates with the rodless cavity of the cylinder through a first pipeline, the gas cylinder communicates with the cabin through a second pipeline, the first electromagnetic valve is arranged on the first pipeline, and the second electromagnetic valve is arranged on the second pipeline. The second electromagnetic valve is arranged on the second pipeline, and inert gas is contained in the gas cylinder; and the control assembly is electrically connected with the pressure release valve, the first electromagnetic valve and the second electromagnetic valve. According to the anti-explosion pressure relief system for the ship cabin and the control method of the anti-explosion pressure relief system, the pressure in the cabin can be kept stable, and the problem of fire disasters can be solved.

The utility model relates to the technical field of fruit and vegetable fresh-keeping devices, and provides a logistics fresh-keeping device for vegetables and fruits, which comprises a box body, a fresh-keeping mechanism is arranged in the box body, by arranging a layer plate, parts such as a mist refrigerator, a liquid storage box, a nitrogen storage tank and the like can be conveniently and independently stored, the mist refrigerator is started, and the fresh-keeping mechanism is started. The mist refrigerator extracts liquid in the liquid storage tank through the liquid extraction pipe and the water passing pipe, and then the liquid is refrigerated and atomized and then conveyed into the vent pipe through the conveying pipe, so that the vent pipe conveys the liquid into the box body through the air spraying holes to preserve fruits and vegetables such as kiwi fruits, blueberries and prunes. And nitrogen can be discharged to a fruit and vegetable storage area in the box body by starting the nitrogen storage tank and the air spraying head, so that oxygen in the box body is mixed with the nitrogen, the content of the oxygen in the box body is reduced, and growth of fruits and vegetables such as kiwi fruits, blueberries and prunes and breeding of bacteria are inhibited. By means of the technical scheme, the problems that in the prior art, the fruit and vegetable fresh-keeping effect is poor, and bacteria breed are solved.

The utility model discloses a wasp pupa storage and fresh-keeping device which comprises a storage cabinet, a nitrogen filling pipe is fixedly communicated with the side wall of one side of the storage cabinet, and the nitrogen filling pipe and an oxygen discharging pipe are arranged on the side walls of the two sides of the storage cabinet respectively. Then nitrogen or other inert gases can be injected into the storage cabinet, due to the fact that the density of the nitrogen is lower than that of the oxygen, when the nitrogen is slowly injected, the oxygen in the storage cabinet can be slowly exhausted, so that the content of the oxygen in the storage cabinet is reduced, the process needs to last for a period of time, and the content of the oxygen in the storage cabinet is detected through a gas detector. According to the storage cabinet, the oxygen content in the storage cabinet can be monitored in real time, it can be ensured that the oxygen content in the storage cabinet is below a set target value, the oxidation and decay processes of wasp pupae can be slowed down by reducing the oxygen content in air in the storage cabinet, and therefore the refreshing time of the wasp pupae is prolonged.

The invention discloses a sealed heating type cigarette with a plug, wherein a sealing member (5) is used to seal the end of a tobacco segment (1) of the cigarette, and the sealing member (5) contains a flavoring material. The sealed heating type cigarette with a plug solves the problem that the smoke volume cannot be increased and harmful components cannot be reduced at the same time, and solves the problem that the smoke cannot be flavored.

This utility model relates to the field of mung bean cake packaging technology, and more particularly to a mung bean cake packaging with a preservation function. The technical solution includes: a packaging box, the packaging box including a box bottom, side panels rotatably disposed on both the left and right sides of the box bottom, a box lid rotatably disposed on the side of the two side panels that are far apart from each other, a box body disposed on the top surface of the box bottom, a buffer layer disposed inside the box body, and a preservation box disposed inside the buffer layer, the preservation box including a second box lid and a second box body. This utility model, by incorporating a humidity regulating bag, can absorb excess moisture inside the packaging, controlling the humidity within a suitable range, preventing the mung bean cake from becoming moldy and spoiled due to dampness, and can also reduce the oxygen content inside the packaging, further inhibiting the growth of microorganisms. The packaging box and buffer layer provide good compressive strength, effectively preventing external pressure from compressing and damaging the mung bean cake inside.

The utility model relates to the technical field of sewage treatment, in particular to an integrated sewage treatment device which comprises a water inlet pipe, a sewage treatment area and an equipment area, the sewage treatment area comprises a pre-aeration adjusting area, an anaerobic area, an aerobic area, a settling area and an artificial wetland area which are sequentially arranged and communicated according to a sewage treatment flow; a first aeration device is further arranged in the pre-aeration adjusting area, a second aeration device is arranged at the bottom of the aerobic area, and a third aeration device is arranged at the bottom of the artificial wetland area; fillers are arranged in the pre-aeration adjusting region, the anaerobic region, the aerobic region and the artificial wetland region; and the first aeration device is circularly started and stopped, so that anaerobic and aerobic environments alternately appear in the pre-aeration adjusting region, anaerobic microorganisms and aerobic microorganisms alternately act to remove organic matters in the sewage, and suspended matters and nitrogen and phosphorus contents of effluent are further reduced through the adsorption action of the filler in the artificial wetland region, so that a guarantee is provided for the standard reaching of water quality.

This invention belongs to the field of metal purification technology and discloses a method for preparing high-purity indium with low silicon content, comprising the following steps: Step 1: Place the indium raw material into a hydrogenation furnace and evacuate to a vacuum degree of 5*10 ‑3 Pa-8*10 ‑3 Step 2: Purge with inert gas to atmospheric pressure and maintain the pressure for 30 minutes; Step 3: Replace the inert gas with hydrogen gas, turn on the heater to raise the temperature to 400-600℃, and maintain the temperature for 1-2 hours to obtain the low-silicon content high-purity indium. This invention discloses a method for preparing low-silicon content high-purity indium, which can reduce the silicon content in high-purity indium to <10 ppbw, effectively improving the performance of high-purity indium.

The application discloses a preparation method and application of aluminum nitride powder, and the preparation method comprises the following steps: S1: coating organic matter on the surface of aluminum oxide and carbonizing to obtain a carbon-coated precursor; S2: mixing and grinding the carbon-coated precursor with carbon material, and then sintering in a nitrogen atmosphere to obtain a sintered product; and S3: mixing the sintered product with a separation liquid, and separating to obtain the aluminum nitride powder; the separation liquid comprises solvent A and solvent B, the polarity of the solvent A is greater than that of the solvent B, the density of the solvent A is greater than that of the solvent B, and the polarity difference between the solvent A and the solvent B is greater than 5. The preparation method of the application can promote complete nitriding, avoid agglomeration between aluminum nitride particles, and thus prepare the aluminum nitride powder with a higher specific surface area, low oxygen content and low carbon impurity content by closely contacting the organic matter with the aluminum oxide particles and carbonizing, and then grinding and sintering with the carbon material.

The invention relates to the technical field of transformers, and discloses a power electrical transformer with a lightning protection function, the power electrical transformer comprises a transformer body, and a lightning rod is mounted in the middle of the top of the transformer body; heat dissipation assemblies used for assisting cooling are installed on the inner walls of the two sides of the transformer body, each heat dissipation assembly comprises a heat dissipation fin plate and a heat dissipation box, the heat dissipation boxes are installed on the inner walls of the two sides of the transformer body, and the heat dissipation fin plates are installed on the sides, away from the transformer body, of the heat dissipation boxes in a linear arrangement mode; a fan for dissipating heat through wind power is installed on one side of the heat dissipation box, and a cooling assembly for cooling through liquid cooling is installed in the heat dissipation box. By means of the flame-retardant assembly and the blocking assembly, the oxygen content in the transformer body can be reduced, the fire extinguishing effect is affected, arc extinguishing can be conducted through impact of sulfur hexafluoride gas on electric arcs, and it is avoided that combustion of the transformer body is aggravated due to arc discharge, and larger loss is caused.

The invention provides a cooking method and device, cooking equipment, a storage medium and a program product, the cooking equipment comprises a cooking cavity, an air exhaust module and a pressure relief module, and the cooking method comprises the steps that in the cooking process of food materials in the cooking cavity, N operation cycles are executed on the food materials in the water absorption stage; each operation period at least comprises an air exhaust time period and a pressure relief time period after the air exhaust time period; the control module is used for controlling the air exhaust module to perform air exhaust treatment on the cooking cavity in the air exhaust period so as to reduce the pressure intensity in the cooking cavity, and controlling the pressure relief module to perform pressure relief treatment on the cooking cavity in the pressure relief period so as to increase the pressure intensity in the cooking cavity.

The utility model discloses a casting component, which relates to the field of industrial smelting and comprises an exhaust device and a reduction cover. High-temperature molten steel needs to be cooled and formed after being poured, however, when the molten steel is exposed in the air in the cooling process, the molten steel reacts with oxygen in the air to form oxides, surface black spots are caused, and the casting quality is affected. By arranging the reduction cover and the exhaust device, the casting is placed in the first cavity in the reduction cover, the exhaust device is connected with the first gas inlet through the first pipeline, protective gas is fed into the first cavity through the first pipeline and the first gas inlet, and therefore original air in the first cavity is exhausted out of the first cavity through the first gas overflow opening. And the casting is in full contact with the protective gas in the cooling process, so that the situation that oxygen reacts with the casting is reduced. Meanwhile, the situation of air convection is simulated, the temperature rise caused by heat radiation of the casting in the first cavity is reduced, the problem of shrinkage cavities caused by poor heat radiation of the casting is reduced, and the quality of the casting is improved.

The invention discloses a distributed power supply grid-connected electric power engineering protection device, which comprises a box body, a mounting guide rail, an anti-islanding protection unit, an electrical unit, a gas suppression unit and a heat dissipation assembly, and is characterized in that the mounting guide rail is fixedly mounted on the inner wall of the box body. Under the extremely high temperature condition, carbon dioxide gas is injected into the box body to rapidly restrain possible sparks, carbon dioxide is used as a fire extinguishing agent, and the oxygen content is reduced, so that the combustion process is prevented, and the fire risk is greatly reduced; once the temperature in the box body returns to normal and the carbon dioxide concentration reaches a safety level, the system can automatically recover to an initial state, so that the continuity and the stability of the whole system are ensured; carbon dioxide gas is prepared on site in a chemical reaction manner, so that effective recycling of resources is realized; carbon dioxide is generated by controlling the reaction between diluted hydrochloric acid and calcium carbonate, and is collected and recharged into the carbon dioxide high-pressure tank through the air pump.

The utility model discloses a high dietary fiber fruit and vegetable pulp homogeneity anti-oxidation stirring tank which comprises a mounting tank body, a top cover is fixed to the top of the mounting tank body through bolts, a feeding pipe is fixed to the outer side of the top cover, a first stirring mechanism is arranged in the mounting tank body, and a second stirring mechanism is arranged in the mounting tank body. The first stirring mechanism comprises a servo motor A, a driving shaft A, a stirring blade A and a supporting sliding seat, a second stirring mechanism is arranged at the bottom of the first stirring mechanism, and an inflation mechanism is arranged on the outer side of the mounting tank body. The first stirring mechanism and the second stirring mechanism form a variable-speed stirring structure, fiber integrity and dispersion uniformity of the fruit and vegetable pulp can be considered, inert gas is released into the mounting tank body through the inflation mechanism, the oxygen content in the mounting tank body can be reduced, the oxidation risk of the fruit and vegetable pulp is reduced, and the production efficiency is improved. And the damage of negative pressure to the physical state of the fruit and vegetable pulp is avoided.

The present application provides an online activation system, method and vehicle for a fuel cell, and relates to the field of fuel cell technology. The system includes: a bidirectional DC converter, a fuel cell, and vehicle equipment, and the vehicle equipment includes: a power battery and electrical equipment on the vehicle; a hydrogen control valve is provided on the hydrogen intake pipe of the fuel cell, a hydrogen circulation pump and a hydrogen-water separator are provided on the hydrogen circulation pipe of the fuel cell, and the hydrogen circulation pipe is connected to the hydrogen intake pipe; an air control valve, an air compressor, an intercooler and a first humidifier are provided on the air intake pipe of the fuel cell, an air-water separator, a three-way valve and a second humidifier are provided on the air circulation pipe of the fuel cell, and the air circulation pipe is connected to the air intake pipe, and the connection position of the air circulation pipe and the air intake pipe is located between the air control valve and the air compressor. Through the system of the present application, the on-board fuel cell can be automatically activated by multi-cycle hydrogen pump and high-power activation when the whole vehicle is running.

The utility model relates to a kind of food processors, including: cabinet, its inside is equipped with the cooking chamber for cooking food, the upper portion of the cooking chamber is equipped with exhaust hole;Negative pressure pump, is located in the cooking chamber outside, and with the exhaust hole communication, for the gas in the cooking chamber is extracted to make cooking chamber inside to be negative pressure state;For preparing food fresh-keeping gas gas generating device;Inside with the air cavity for storing food fresh-keeping gas's gas storage device, air cavity gas inlet with the output end of the gas generating device is communicated, air cavity gas outlet is communicated to the cooking chamber by gas pipeline, and gas pipeline is equipped with for controlling gas flow's flow control valve, when flow control valve opens, the gas storage device is arranged, and food fresh-keeping gas in it can be inhaled into cooking chamber under the action of cooking chamber inside negative pressure.The utility model can reduce the risk of food material being oxidized.

The invention discloses an SAE8620H steel tail end hardenability detection method, belongs to the technical field of metal material performance, and aims to solve the problem of poor consistency of detection values of a hardenability detection method in related technologies. Comprising the following steps: preparing a sample; the sample is placed in a heat treatment furnace, nitrogen is added into the heat treatment furnace, the whole hearth of the heat treatment furnace is covered with the nitrogen, and the sample is heated to the austenitizing temperature; after the heat preservation time is ended, taking out the sample from the heating furnace, and carrying out water spray quenching on the sample; after quenching is completed, the sample is put into water to be cooled; after the sample is cooled, the hardness of the quenched end of the sample is measured; according to the invention, the consistency and accuracy of hardenability detection values can be improved.

The invention discloses a pepper planting soil improvement method which comprises the following steps: S1, deep ploughing and soil improvement: deeply ploughing soil for 30-35 cm in a whole garden deep ploughing mode except for the lower part of a pepper tree crown in a planting field, harrowing, leveling, and removing sundries in the soil; then plant straw with the thickness of 5-10 cm is flatly laid, and then the soil is deeply ploughed by 30-40 cm; 1000-1500 kg of a high-quality decomposed organic fertilizer, 100-120 kg of a calcium superphosphate phosphate fertilizer and 300-400 g of a soil conditioner are applied per 667 m < 2 >, and the soil conditioner is prepared from, by weight, 45-60 parts of egg shell residues, 2-3 parts of pepper branch wood chips, 2.5-3 parts of tea residues, 0.2-0.5 part of streptomyces erythroflavus, 0.1-0.3 part of bacillus and 0.2-0.4 part of lactic acid bacteria. The zanthoxylum soil conditioner provided by the invention is applied to zanthoxylum planting soil improvement, so that the organic matter content of zanthoxylum planting soil and agglomeration of soil particles are increased, a stable soil structure is formed, and the water-retaining property, the air permeability and the fertility of the soil are improved.

The utility model discloses a high-volatility material storage device, relates to the technical field of material storage, and solves the problems that in the prior art, only the sealing performance of a storage tank is emphasized, volatile gas cannot be discharged in time, and the high-volatility material storage device cannot adapt to high-volatility materials. A high-volatility material storage device comprises a tank body and a tank cover, the tank cover is detachably connected to the upper end of the tank body through a connecting assembly, the upper end of the tank cover is connected with a nitrogen flow control box through a gas conveying pipe, and the nitrogen flow control box is connected with a nitrogen storage tank; the peripheral side of the tank body is connected with a refrigeration box; the side wall of the tank body is connected with an exhaust pipe, the exhaust pipe penetrates through the refrigeration box, and the end part of the exhaust pipe is connected with a one-way valve; a discharging pipe is arranged at the lower end of the tank body, and a butterfly valve is connected to the discharging pipe. The device has the beneficial effects that the temperature of the tank body can be controlled, the stability of materials is guaranteed, meanwhile, gas in the tank body is discharged in time, and danger caused by too large pressure of the tank body is avoided.

The invention discloses a fresh-keeping method of fresh macadamia nut kernels, and belongs to the technical field of fresh-keeping storage of fresh macadamia nut products. The fresh-keeping method of the fresh macadamia nuts comprises the following steps: taking fresh macadamia nuts which are just picked, removing green peels and hard shells, and ensuring that the moisture content of the macadamia nuts is more than 15wt%; and putting the nutlet into a packaging box, adding a preservative into the packaging box, and sealing and storing to complete preservation of the fresh macadamia nut nutlet. The component of the fresh-keeping agent comprises plant polyphenol. As the content of unsaturated fatty acid and the water content are relatively high, the fresh macadamia nuts are extremely easy to oxidize and rancidify in the fresh-keeping storage process, and microorganisms such as mould are bred, the plant polyphenol is added into the fresh macadamia nuts without green peels and hard shells for sealed storage, so that the fresh macadamia nuts can be stored in the fresh-keeping storage process; the oxygen content in the macadamia nut fresh nutlet package is rapidly reduced, and meanwhile, a part of water vapor is absorbed, so that the effect of inhibiting respiration and oxidation of fresh nutlets is achieved, meanwhile, the growth of microorganisms can be inhibited, and the refreshing time of the macadamia nut fresh nutlets is prolonged.

The invention provides a sodium nitroprusside injection and a preparation method thereof. The preparation method comprises the following steps: S1, taking part of water for injection into a preparation tank, filling nitrogen, and stirring to obtain pretreated water for injection; s2, controlling illumination, adding sodium nitroprusside into the pretreated water for injection while stirring, then stirring, adding the residual water for injection to the total preparation amount, and stirring again to obtain a sodium nitroprusside liquid medicine; s3, the sodium nitroprusside liquid medicine is filtered and filled, and the sodium nitroprusside injection is obtained. According to the preparation method, firstly, the oxygen content in the water for injection can be greatly reduced through proper stirring process conditions, the illuminance and temperature of the environment are controlled when sodium nitroprusside is added, and sodium nitroprusside can be effectively prevented from being decomposed and is promoted to be dissolved through a specific multiple stirring synergistic effect; impurities are effectively removed under proper filtering conditions, and finally, decomposition of sodium nitroprusside is effectively avoided by controlling reasonable filling conditions, so that the stability is improved.

The present invention proposes a gas inertization treatment device of a solid heat storage system by elimination method, which belongs to the field of heat storage technology. It includes a heating channel, a heating wire, a heat exchange channel, a gas inertization treatment device, etc. The gas inertization treatment device is used to eliminate the oxygen in the internal circulating gas and then send it back to the sealed solid heat storage system; before the air enters the gas inertization treatment device, an adsorption device is used to eliminate large particle impurities and water vapor in the circulating gas, and a filtering device is used to eliminate sulfur-containing gas and other corrosive gas components in the circulating gas. The oxidation of the heating wire is effectively slowed down, and the heating wire is directly involved in ventilation and heat exchange during the heat storage process, which effectively reduces the working temperature of the heating wire, thereby greatly improving the service life of the heating wire. At the same time, the heat exchange area inside the heat storage body is expanded, and the heat storage capacity, heat absorption and heat release efficiency and dynamic response performance are improved. It also has the advantages of simple structure, low cost, reliable operation and convenient maintenance.

This utility model provides a self-regenerative oxygen-enriched burner, belonging to the technical field of combustion equipment. The self-regenerative oxygen-enriched burner includes a combustion chamber; side plates, which are bolted to the left and right ends of the combustion chamber; L-shaped tubes, which are fixedly connected to the left and right ends of the side plates; a heat storage body, which is fixedly connected inside the two L-shaped tubes; and a support, which is fixedly connected to the lower end of the combustion chamber. A reversing valve is connected to the support, and a connecting pipe connects the reversing valve to the L-shaped tubes. In this design, the heat storage body receives and stores heat transferred from high-temperature flue gas during combustion, and then uses this heat to subsequently heat the cold air or gas entering the combustion chamber, achieving efficient heat recovery and reuse, reducing energy waste, and improving combustion energy utilization efficiency.

The utility model discloses a fireproof heat insulation type tensile medium voltage cable, comprising a cable core, the cable core comprises a wire core, the wire core is composed of an inner sheath and a conductor, the inner sheath is composed of an inner insulating layer, semiconductor paper and a copper strip, the cable core is wrapped by a composite fireproof layer, and the composite fireproof layer is wrapped by an outer insulating layer. The composite fireproof layer is composed of a heat insulation layer, an isolation layer and a fire retardant layer, the composite fireproof layer is wrapped by a composite tensile layer, the composite tensile layer is composed of a base layer, an enhancement layer and a protection layer, and through the mode, the problem that the medium-voltage cable is poor in fireproof, heat insulation and tensile performance is solved.

This utility model relates to the field of packaging equipment technology and discloses a packaging equipment for phospholipid production. It solves the problems of low automation, low packaging efficiency, and high risk of contamination associated with existing phospholipid production packaging equipment, as well as the difficulty of adapting to the high viscosity and easy oxidation characteristics of phospholipids using exposed packaging. The equipment includes a workbench with support frames fixedly installed at both ends of its bottom. A conveyor belt is fixedly installed on the top of the workbench, and a packaging box is fixedly installed in the middle of the conveyor belt. An observation window is fixedly installed on the upper front side of the packaging box, and a PLC logic controller is fixedly installed on the lower front side of the packaging box. A servo motor is fixedly installed on one side of the top of the packaging box via a support plate, and a transmission component is provided at the output end of the servo motor. This phospholipid production packaging equipment has a high degree of automation, fast packaging speed, and uses sealed vacuum packaging to avoid contamination and improve product quality.