162results about How to "Prevent spontaneous combustion" patented technology

The invention discloses gel foam for preventing spontaneous combustion of coal, and belongs to the technical field of gel foam fire extinguishing. The gel foam comprises the following components: 0.1-0.5% of a composite foaming agent, 5-15% of a gelling agent, 0.1-0.5% of a cross-linking agent and the balance of water, the composite foaming agent is sodium lignin sulfonate and sodium fatty alcohol polyoxyethylene ether carboxylate; the gels are silica sol and sodium alginate. The gel foam has excellent water-retaining property, and can relieve water loss and weight loss of coal; the flame retardant can effectively hinder the contact between coal and oxygen, interrupt the free radical chain reaction of coal and avoid the oxidation weight gain of coal, and has an excellent flame retardant effect; in the combustion process, less heat is generated, and the smoke suppression effect is excellent. The gel foam does not contain antioxidants and flame retardants, can avoid environmental pollution, is an environment-friendly anti-oxidation gel foam, and can be used as an efficient fire preventing and extinguishing material in the field of preventing spontaneous combustion of coal.

The overlying oxygen isolation device comprises a storage yard, a plurality of double-flow nitrogen conveying hoses are arranged on the upper surface of the storage yard, the interval between every two adjacent double-flow nitrogen conveying hoses is 0.5-3 m, a plurality of through grooves are formed in the outer surfaces of the double-flow nitrogen conveying hoses, the through grooves are distributed in the axis direction of the double-flow nitrogen conveying hoses, and the through grooves are communicated with the double-flow nitrogen conveying hoses. And a plurality of lifting arc supports are fixedly mounted on the upper surface of the storage yard corresponding to the double-flow nitrogen conveying hose. By arranging a double-flow nitrogen conveying hose, a nitrogen purifying and drying device and a nitrogen detection box, high-concentration nitrogen sequentially passes through a mixed gas buffer box, a first connecting pipe, a gas inlet pipe and a stable ventilation pipe and enters the combustible rock soil through the double-flow nitrogen conveying hose, and meanwhile, the nitrogen purifying and drying device extracts gas in the combustible rock soil; nitrogen rapidly enters the flammable rock-soil, air in the flammable rock-soil is rapidly extruded out through the nitrogen, and therefore the flammable rock-soil and the air are isolated, and spontaneous combustion of the flammable rock-soil is prevented.

The invention discloses a plugging method, device and system for an air leakage channel in a mine. The method comprises the following steps: acquiring a vertical section image of a rock stratum in a mine; based on the vertical profile images, height information of caving zones corresponding to the different types of rock stratums is determined; based on the height information and distance information between a working face of the mine and a roadway in the mine, angle information of a foam injection hole in the mine is determined, and the working face is an area where a mining operation task is being executed in the mine; a target air leakage area of the goaf in the mine is determined, and according to the angle information, the foam injection pipe extends into the target air leakage area through the foam injection hole so as to block an air leakage channel between the goaf and the external environment of the mine and an air leakage channel between the goaf and the working face, the goaf is an area where a mining operation task is executed in the mine. The technical problem that an air leakage channel in a mine cannot be effectively blocked is solved.

A lithium battery thermal runaway control system comprises a battery box and a battery arranged in the battery box, the battery comprises a top cover, the top cover is provided with a positive pole, a negative pole, a short circuit mechanism and a pull wire mechanism for starting the short circuit mechanism, the lithium battery thermal runaway control system further comprises a watering mechanism and a temperature sensing system, and a water outlet nozzle of the watering mechanism is aligned with a valve port. And the temperature monitoring mechanism detects the temperature in the battery and sends an operation instruction to the wire pulling mechanism. According to the structure and the system provided by the invention, when abnormal temperature rise of a certain lithium battery in a box body is detected and thermal runaway is judged to occur, the wire drawing mechanism is driven to actively cause external short circuit of the lithium battery and quickly consume the electric quantity of the battery, and the watering mechanism waters a short-circuit structural member and continuously cools the short-circuit structural member. According to the treatment mode, thermal runaway of one or more lithium batteries can be quickly and effectively controlled, and spontaneous combustion of the lithium batteries is prevented without affecting others.

The invention relates to the technical field of wires, and provides a high-temperature-resistant silicone rubber cable which comprises a plurality of wires. The cooling body is provided with a plurality of containing grooves, the wires are located in the containing grooves, the cooling body is further provided with a first inner cavity, the first inner cavity is used for containing cooling liquid, and the cooling body is made of heat conduction materials. The wire and the cooling body are positioned in the sheath; the filling layer is located between the sheath and the cooling body and between the sheath and the wire. According to the technical scheme, the problem that the heat resistance of a high-temperature-resistant cable is difficult to improve in the prior art is solved.

The invention discloses a mining air-leakage-stopping flame-retardant anti-static spraying foaming material and a preparation method thereof, and relates to the technical field of spraying foaming materials, the mining air-leakage-stopping flame-retardant anti-static spraying foaming material comprises a first component and a second component, the first component comprises the following raw materials in parts by weight: polyether polyol, a flame retardant, a catalyst, a foam stabilizer, an antistatic agent, a filler, a plasticizer and a foaming agent; the second component is prepared from the following raw materials in parts by weight: diisocyanate, a plasticizer, a flame retardant and filler. Efficient anti-static is achieved through the modified conductive graphite, and the problem that a traditional antistatic agent is poor in compatibility is solved; the flame retardant property is remarkably improved by adopting an efficient flame retardant composition, and spontaneous combustion in a high-temperature environment is prevented; the combination of polyether polyol and diisocyanate is optimized, so that the compressive property and the mechanical strength are improved; and low-temperature reaction reduces potential safety hazards, construction is convenient, and various conditions are adapted. The material effectively solves the problems of insufficient anti-static, flame-retardant and compression-resistant properties, and provides safe and reliable technical guarantee for underground coal mines.

The invention relates to the technical field of tail gas treatment, in particular to an activated carbon desulfurization and denitrification tower which comprises a tower body of a thin-wall structure, an output port is formed in the top of the tower body, an input port is formed in the bottom of the tower body, and the interior of the tower body is used for containing activated carbon. Activated carbon particles located at the bottom of the carbon bed layer are circularly transferred to the top of the carbon bed layer in a reciprocating mode, and when the cold water spray head sprays cold water to the carbon bed layer from the upper portion for cooling, the activated carbon particles moving to the top of the carbon bed layer from the bottom of the carbon bed layer can rapidly dissipate heat. Therefore, spontaneous combustion or burning of the activated carbon particles at the bottom of the carbon bed layer due to insufficient heat dissipation efficiency can be prevented.

The invention belongs to the technical field of coal mines, discloses a method and a system for determining key pressure injection parameters of liquid CO2 for preventing oxidation of residual coal in a goaf, and aims at taking a coal mine as a research object, and obtaining comprehensive basic data by measuring the inclination length and mining height of a working face and the air distribution amount of the working face in detail. Meanwhile, the oxygen concentrations of different burial depths of the air inlet side of the working face in the test area are measured, and the pressure injection amount of the liquid CO2 and the inhibition effect of the liquid CO2 on coal seam oxidation can be analyzed more accurately in combination with oxygen concentration distribution in the actual coal mine environment. By analyzing the pressure injection period of the liquid CO2, the oxidation reaction of the residual coal is effectively controlled on the premise of not influencing the normal coal mine production. The method not only can be used for fire extinguishing and oxidation control under emergency conditions, but also can use a liquid CO2 injection technology as a daily prevention and control measure, so that the efficiency of coal mine safety production is improved, the risk of fire caused by oxidation is reduced, and the method has a wide industrial application prospect.

The invention relates to a goaf foam fixed-point injection air leakage stoppage device and method, the air leakage stoppage device comprises two foam generating devices and a foam injection pipe, the two foam generating devices are arranged in an air inlet roadway and an air return roadway respectively and connected with forepoling hydraulic supports in the air inlet roadway and the air return roadway, and the foam injection pipe is connected with the forepoling hydraulic supports in the air inlet roadway and the air return roadway. The forepoling hydraulic support can drive the foam generating device to move forwards; coal wall pipe grooves extending in the front-back direction are formed in the protective coal pillars on the left side and the right side of the goaf, foam injection pipes are laid in the coal wall pipe grooves, the output end of the foam generation device communicates with the ends, away from the goaf, of the foam injection pipes, and a plurality of foam release openings are formed in the foam injection pipes at equal intervals in the length direction; and an old channel can be automatically closed and a new injection point can be opened along with collapse of overlying strata. According to the air leakage stoppage device, the foam injection pipe is laid on the coal wall of the protection coal pillar, the construction cost is low, the air leakage stoppage device cannot be crushed by fallen rocks, and meanwhile, the released foam can effectively block an air leakage channel in a triangular area.

The invention discloses a mobile new energy charging bin with an automatic gun releasing structure, which comprises a mobile charging bin, the mobile charging bin is connected with a charging gun through a wire, the charging gun is provided with a pressing locking key and a movably arranged locking hook, and the mobile new energy charging bin further comprises an automatic gun releasing unit, and when the new energy automobile slides in the charging process, locking of the charging gun and a charging socket in the new energy automobile is automatically relieved, and separation of the charging gun and the charging socket is automatically completed. The automatic gun releasing unit is arranged on the movable charging bin, when a vehicle slides, locking of the charging gun and the charging socket can be automatically released, meanwhile, the charging gun and the charging socket are separated, and the movable charging bin is prevented from being dragged or even overturned to cause spontaneous combustion.

The invention discloses fire preventing and extinguishing adhesive gel for the top of a coal mine goaf, a preparation method and application, and relates to the technical field of mine fire preventing and extinguishing. The method comprises the following steps: firstly, preparing a sodium alginate solution, then preparing a nano-clay-polydopamine composite material, and mixing and stirring the nano-clay-polydopamine composite material and the sodium alginate solution to obtain a mixed solution I; adding a sodium hydroxide aqueous solution into acrylic acid for partial neutralization, and adding the mixed solution I into the neutralized solution to obtain a mixed solution II; adding an initiator and a cross-linking agent into the mixed solution II, and uniformly stirring to obtain a mixed solution III; and finally, stirring the mixed solution III at a certain temperature to form gel, thereby obtaining the product. The prepared fire preventing and extinguishing gel is especially suitable for the top of a coal mine goaf, and shows excellent leakage stoppage performance, inhibition performance, adhesion and water-retaining performance.

The utility model discloses a new energy automobile with a wire harness placing device, which relates to the technical field of new energy power and comprises a new energy automobile and the wire harness placing device. A battery mounting box is fixedly mounted at the bottom of the new energy automobile, storage batteries are uniformly mounted in the battery mounting box, and two clamping grooves are formed in the top of the battery mounting box; the new energy automobile with the wire harness placing device comprises a connecting bridge plate, a first clamping plate, a second clamping plate and hexagon socket screws, the connecting bridge plate is rotationally installed in two clamping grooves, and the first clamping plate is welded to the bottom of the connecting bridge plate. The wire harness of the storage battery is fixed more stably through the hexagon socket screws and the two clamping plates, friction between the wire harness of the storage battery and the battery mounting box can be prevented, insulation damage of the wire harness of the storage battery and line faults are avoided, normal operation of a new energy automobile is guaranteed, and spontaneous combustion of the new energy automobile is avoided as much as possible.

The utility model discloses a waterproof self-adhesive label which comprises a base material, an adhesive is arranged at the bottom of the base material, backing paper is arranged at the bottom of the adhesive, and a coating is arranged at the top of the base material. The coating comprises a flame-retardant layer, the top of the base material is coated with the flame-retardant layer, the top of the flame-retardant layer is coated with a corrosion-resistant layer, the top of the corrosion-resistant layer is coated with a waterproof layer, and the top of the waterproof layer is coated with an insulating layer. Through the decabromodiphenyl acid layer, the chlorinated paraffin layer and the trichloroethylene layer in the flame-retardant layer, the phenomenon of spontaneous combustion of the self-adhesive label due to high temperature can be avoided in a special use environment, and the use safety is effectively improved; and through a tetrafluoroethylene layer and a polyurea layer in the corrosion-resistant layer and a polyvinyl chloride layer, a polyisobutene layer and a polyurethane layer in the waterproof layer, the problem that the surface of the adhesive label is corroded by rainwater or moisture in a humid environment can be effectively avoided.

The invention discloses a coal pile porosity measuring method based on coal-water two-phase permeation. The existing measuring method has the defects of complicated operation, unsuitability for field measurement or capability of only measuring the porosity in pores in coal. The method comprises the following steps; in the coal loading process of coal piles of different coal types, multiple positions are selected on a coal pile platform, coal on the top face is scraped off, a coal pit is dug, and all coal in the pit is collected; drying the collected coal sample; filling the dried coal sample into a container with known volume and weight, compacting with a rubber hammer, weighing the gross weight, and calculating the apparent density; the total porosity of particles is calculated according to the density of water, the internal porosity is taken, and a coal pile porosity and coal pile height curve graph is established by taking porosity data measured on three coal pile platforms with different heights as horizontal coordinates and coal pile heights as vertical coordinates. When in use, the porosity among the coal particles of the coal pile at the corresponding height can be found from the curve graph. The method is used for measuring the porosity of the coal pile.

The utility model relates to the technical field of battery cabinets, in particular to a combined battery cabinet which comprises a cabinet body, a heat dissipation mechanism used for helping batteries to dissipate heat is arranged on the cabinet body, the heat dissipation mechanism comprises a plurality of first sliding grooves, the first sliding grooves are formed in the cabinet body, mounting plates are connected in the first sliding grooves in a sliding mode, and the mounting plates are arranged in the first sliding grooves. A plurality of heat dissipation openings are formed in the mounting plate, a boundary plate is fixedly connected to the middle position of the mounting plate, through cooperation of the cabinet body and the heat dissipation mechanism, heat dissipation of the battery is achieved, the device is simple to operate, heat dissipation can be effectively conducted on the battery in the battery power generation process, and the service life of the battery is prolonged. The spontaneous combustion of the battery caused by overheat of the battery or untimely heat dissipation is effectively avoided, the protection on an operator is effectively improved, and the safety is relatively high.

The invention provides a hydrogen energy storage automobile direct-current charging pile with a hydrogen energy generator, and belongs to the technical field of automobile direct-current charging piles. The hydrogen energy storage automobile direct-current charging pile comprises a base and a charging pile body, and the charging pile body is installed on one side of the base.When the hydrogen energy storage automobile direct-current charging pile is used, hydrogen in a power generation hydrogen storage tank is combusted, and the hydrogen serves as fuel through a fuel cell in the hydrogen energy generator; electric energy is generated through chemical reaction, meanwhile, generated water is discharged into the cooling box through a connecting pipeline, the cooling box cools the discharged water, a switch of a water pump is turned on at the moment, the cooled water in the cooling box flows into a disc-shaped pipe through a water outlet end, heat generated when the water works in the charging pile body can touch the outer surface of the disc-shaped pipe, and the charging pile body works in the charging pile body. And heat is absorbed, the interior of the charging pile body is cooled, in this way, the phenomenon that the temperature in the charging pile body is too high and spontaneous combustion occurs can be avoided, meanwhile, water generated by combustion power generation is utilized, and the resource utilization rate is increased.

A fuel air premixer can prevent tempering and explosion and comprises an air inlet pore plate, a fuel air inlet pore plate, an air outlet pore plate and a fuel air inlet pipe. The fuel air inlet hole plate is arranged on the downstream of the air inlet hole plate, and the air outlet hole plate is arranged on the downstream of the fuel air inlet hole plate. A fuel and air mixing cavity is formed between the air inlet pore plate and the fuel inlet pore plate; a fuel gas collecting cavity is formed between the fuel gas inlet pore plate and the gas outlet pore plate; the air inlet direction of the air inlet holes points to the fuel and air mixing cavity from the upstream side of the air inlet hole plate. The gas inlet direction of the fuel gas inlet hole points to the upstream side of the fuel gas inlet hole plate from the fuel gas collecting cavity; the fuel and air mixing cavity communicates with a plurality of air outlet pipes; the fuel gas inlet pipe is communicated with the fuel gas collecting cavity; the gas outlet pipe penetrates through the fuel gas inlet pore plate and the gas outlet pore plate, and the drift diameter of the gas outlet is smaller than that of the gas inlet. A combustion chamber head includes the fuel air premixer. A combustion chamber includes the combustion chamber head.

The utility model discloses a kind of waste liquid collectors for biological medicine production, belong to waste liquid collector technical field.A kind of waste liquid collector for biological medicine production, including base and the collection tank of being movably installed on base, liquid suction member is provided on collection tank, further include: slidingly installed on the separation plate of collection tank, and separation plate has wave crest and wave trough, and separation plate is annularly arranged with permeation hole, filter paper is provided on separation plate, when waste liquid passes through filter paper, filter paper separates solid in waste liquid;Mounting piece is fixedly installed on separation plate, and mounting piece is annularly arranged on separation plate;The utility model uses the cooperation of separation plate and filter paper for use, effectively separates solid and liquid in solid-liquid mixture, to avoid solid or semi-solid substance and liquid are collected simultaneously, cause subsequent in oxidizing environment material appears local overheating or spontaneous combustion phenomenon, improve the security when using collector.

The utility model discloses safe storage equipment for refined glycerol, which relates to the technical field of refined glycerol storage, solves the technical problem of lack of heat preservation and flow slowing structures in the prior art, and comprises a main tank body and a tank body cover, a material injection structure is mounted on the tank body cover, and a material discharge structure is mounted at the lower end of the main tank body. An isolation flow slowing structure is fixedly installed in the main tank body, a low-temperature maintaining structure is fixedly installed outside the main tank body, through the isolation flow slowing structure, fluid inertia impact caused by vehicle braking or starting in the transportation process can be effectively reduced, and the risk of the tank body is reduced; in the filling and discharging processes, accidental combustion of the refined glycerol is prevented through a slow flow design; the low-temperature maintaining structure adopts a refrigerating machine compression refrigerating technology, and a low-temperature environment is maintained through spiral winding of a cooling pipe, an outer shell and a multi-layer heat preservation design, so that spontaneous combustion or chemical reaction caused by temperature rise in the transportation or storage process is prevented, and the quality and storage safety of glycerol are guaranteed.

The invention discloses an alloy catalyst post-processing system and a post-processing method, and particularly relates to the technical field of fuel cells. The drying chamber is in airtight sealing connection with the airtight reaction chamber, the heat treatment chamber is in airtight sealing connection with the airtight reaction chamber, and the screening device is arranged in the airtight reaction chamber and used for screening and weighing an alloy catalyst; the passivation sealing bin is arranged in the airtight reaction chamber and is used for passivating the alloy catalyst; the atmosphere control device comprises a vacuum pump communicated with the drying chamber, and atmosphere inflation equipment and a tail gas treatment device which are respectively communicated with the airtight reaction chamber, the drying chamber, the heat treatment chamber and the passivation sealing bin; and the heating device is used for independently heating the airtight reaction chamber, the drying chamber and the heat treatment bin. Uniform passivation of the alloy catalyst can be realized, the stability and safety of the alloy catalyst are ensured, the operation is simple and convenient, the treatment efficiency is improved, and the process controllability is ensured.

The utility model relates to the technical field of activated carbon dryers, in particular to a special spontaneous combustion prevention activated carbon dryer which comprises a drying box, a motor is fixedly connected to one side of the drying box, a rotating shaft is arranged at the output end of the motor, an intermittent mechanism is connected to one side of the rotating shaft, and a reciprocating mechanism is connected to one side of the intermittent mechanism. A reciprocating mechanism is fixedly connected to one side of the drying box, a folding block is connected to one side of the reciprocating mechanism, a feeding port is fixedly connected to the top of the drying box, the folding block is located in the middle of the feeding port, a protection block is fixedly connected to one side of the drying box, a storage plate is fixedly connected to the interior of the drying box, and a pushing mechanism is correspondingly arranged on one side of the storage plate. A groove opening is formed in one side of the drying box, an opening and closing mechanism is correspondingly arranged in the groove opening, a humidity sensor and a temperature sensor are connected to one side of the storage plate, and the temperature sensor corresponds to the opening and closing mechanism.

The invention discloses a mine waste heat recovery fireproof flame-retardant material, and relates to the technical field of flame-retardant materials. The flame-retardant material comprises an additive, an adhesive, a surfactant, dispersed latex powder, an inhibitor, a dispersing agent and water. The flame-retardant material is prepared by emulsifying, polymerizing, mixing, purifying and concentrating the additive, the adhesive, the surfactant, the dispersed latex powder, the inhibitor, the dispersing agent and the water. The flame-retardant material prepared from the formula components is a highly concentrated solution, the use cost is effectively reduced, the operation is simpler in the use process, the effect is more complete, equipment is protected from being damaged, the flame-retardant material is sprayed on a coal body, a layer of nano-scale protective film is formed on the surface of the coal body, the coal body is prevented from being in contact with oxygen at a microscopic level, and the oxygen content is reduced. Unsaturated functional groups in the molecular structure of the coal are inerted, the oxidation activity of the coal is improved, the critical temperature of the coal in each oxidation stage is increased, the oxidation speed of the coal is fundamentally reduced, and then the purpose of preventing spontaneous combustion of the coal is achieved.

The invention discloses an operation method of a fire-fighting early warning system based on a cloud platform, and the method mainly comprises the following steps: S1, collecting the temperature of inflammables in a workshop through a monitoring module, and inputting the comprehensive information of the inflammables and explosives in the workshop into a system; s2, starting to analyze the visual image and the inflammable temperature in the workshop, judging whether a fire occurs or not according to an analysis result, and performing early warning; s3, when the system detects that a fire occurs, the combustion characteristics of inflammables at a fire point and the distance between the inflammables around the fire point and the fire point are analyzed, and the fire hazard degree and the fire spreading trend are judged according to the analysis result; and S4, after the fire hazard degree is determined, analyzing and planning an escape route. The method has the characteristic of improving accuracy and safety.

The utility model relates to the technical field of energy storage, and provides a battery cell module and an energy storage cabinet, and the battery cell module comprises a module shell, a battery cell module, an aerosol generation device, a first fire extinguishing agent supply part and a liquid cooling plate. A discharge port of the first fire extinguishing agent supply part, the battery cell module and the aerosol generation device are all located in the module shell; the aerosol generating device is used for generating aerosol when a fire occurs; the first fire extinguishing agent supply part is used for providing a fire extinguishing agent from the discharging opening when a fire occurs. And the liquid cooling plate is positioned in the module shell and is clamped between the battery cell module and the module shell. In this way, the fire-fighting performance of the battery cell module is improved, the purpose of timely extinguishing fire in the module shell can be achieved, and fire spreading is effectively prevented. And in addition, the liquid cooling plate effectively avoids accumulation of heat generated during operation of the battery cell module, so that the probability of fire disasters can be reduced from the source.

The present invention provides a novel method for disposing of spent bleaching earth that is economically advantageous and avoids the problems typically associated with its disposal. By adding fine lime (calcium carbonate) to the spent bleaching earth discharged from the process filters, spontaneous combustion can be eliminated. The material can then be transported in solid form to a production facility for use as a nutrient ingredient in the manufacture of a wide range of poultry and livestock feed products.

This invention relates to the field of coal mining technology, specifically disclosing a coal mine roadway conveying and crushing system, including a frame and a conveying platform. The side wall of the frame is equipped with an adjustment mechanism, which includes two fixed blocks, both fixedly connected to the side wall of the frame. A cylinder is slidably inserted into the surface of each fixed block. A limiting ring frame is fixedly connected to the end of each cylinder that is close to the other. A first motor is installed inside the limiting ring frame, and the output end of the first motor is fixedly connected to a crushing cylinder. This invention, by setting a convex plate, can adjust the distance between the two crushing cylinders when extended vertically, thereby achieving a better crushing effect on large coal blocks. When extended horizontally, the convex plate can adjust the water flow rate in the guide pipe, allowing the crushing cylinder to spray water mist with different flow rates for coal blocks of different sizes during crushing, thus improving adaptability.

The invention relates to the technical field of raw coal storage equipment, in particular to a raw coal bunker with a bunker dividing structure, which comprises a coal inlet bunker, a coal storage bunker and two groups of detection devices, the coal inlet bunker and the coal storage bunker are integrally and coaxially arranged, and the coal inlet bunker is positioned at the top of the coal storage bunker; the coal inlet bin is of a conical hollow structure. The coal storage bunker is of a conical hyperbolic structure; a partition plate is vertically arranged in the coal storage bunker, the two side edges of the partition plate are fixedly connected with the inner wall of the coal storage bunker, the partition plate divides the coal storage bunker into a first coal storage part and a second coal storage part, and the first coal storage part and the second coal storage part are symmetrically arranged relative to the partition plate; high-heat coal is arranged in the first coal storage part, and economic coal is arranged in the second coal storage part; a coal feeding opening is formed in the lower portion of the coal storage bunker and connected with a coal feeder. The raw coal bunker is arranged; and corresponding gate valves can be conveniently opened according to different coal using requirements, coal types can be rapidly replaced, a unit can be rapidly connected with loads, and the power generation efficiency of the unit is improved.

The invention discloses a radioactive solid waste compression method which comprises the following steps: before compression, filling a compression cavity where a container is located with set gas so as to discharge air in the compression cavity; wherein the radioactive solid waste is placed in the container; compression is started, and in the compression process, the compression cavity is continuously filled with the set gas till compression is completed; the set gas is non-combustible and non-combustion-supporting gas. According to the compression method for the radioactive solid waste, spontaneous combustion of the radioactive solid waste can be effectively restrained in the compression process, the operation safety is improved, and waste leakage is avoided. The invention further provides a radioactive solid waste overpressure machine.

The utility model discloses a conveying device for coal mining, and belongs to the field of coal mining, in particular to a conveying device for coal mining, which comprises support frames, side plates, a first conveying belt and a second conveying belt, the side plates are symmetrically and fixedly mounted on the side surfaces of the support frames, the first conveying belt is fixedly mounted between the support frames, and the second conveying belt is fixedly mounted between the support frames. A second conveying belt is fixedly installed between the supporting frames, and the second conveying belt is located below the first conveying belt. The conveying device and the screening device are arranged, so that material conveying can be automatically and stably completed, coal can be automatically screened in the conveying process, and the conveying efficiency is improved; according to the coal screening device, materials which do not meet specifications and are small in size in coal are screened out, then the materials are conveyed through a single conveying belt, on the premise that stable conveying of the materials is guaranteed, screening of the materials is rapidly completed, and the device is more efficient and stable in use.

The invention discloses a regenerated coal flame retardant as well as a preparation method and application thereof, and belongs to the technical field of flame-retardant materials. Magnesium salt and aluminum salt are used as base materials, silicon in silicate is combined to form a flame-retardant material with a hydrotalcite-like structure under specific conditions, the special structure enables the flame-retardant material to have excellent flame-retardant performance, spontaneous combustion of coal can be effectively prevented, the hydrotalcite structure damaged in the flame-retardant process can be regenerated in a humid and hot environment, and the flame-retardant performance of the flame-retardant material is improved. Therefore, the long-acting flame-retardant effect of the coal is achieved.