25 results about "Aluminium phosphide" patented technology

The invention relates to the technical field of grain depot storage equipment, and particularly discloses an aluminum phosphide automatic dosing robot which comprises a walking mechanism, a medicine preparing mechanism, a metering mechanism, a dosing mechanism and a controller. The walking mechanism is provided with the medicine preparing mechanism, the tail end of the medicine preparing mechanism is connected with the metering mechanism, and the metering mechanism is in butt joint with the dosing mechanism; the medicine feeding mechanism is used for feeding aluminum phosphide tablets to a feeding point in a grain depot, and the controller is used for controlling the walking mechanism, the medicine preparing mechanism, the metering mechanism and the medicine feeding mechanism to work cooperatively. The automatic aluminum phosphide dosing robot aims at solving the problems that traditional aluminum phosphide dosing is high in manual dependency degree, large in safety risk, low in efficiency and poor in precision, full-process automation from medicine bottle opening to tail end dosing is achieved, operation safety and dosing precision are guaranteed, and the automatic aluminum phosphide dosing robot adapts to the complex environment of a grain depot.

The invention discloses a grain storage barn fumigation pipeline system which comprises a grain storage barn, a circulation fumigation pipeline assembly, an air adjusting valve assembly, a circulation fan and an aluminum phosphide medicine feeding mechanism, the circulation fumigation pipeline assembly is installed on the outer wall of the grain storage barn, and ventilation ground cage openings are symmetrically formed in the lower portion of the circulation fumigation pipeline assembly; the air adjusting valve assembly and the circulation fan are both connected with the circulation fumigation pipeline assembly, the aluminum phosphide medicine feeding mechanism comprises a containing barrel and a medicine feeding assembly used for evenly feeding aluminum phosphide tablets, and the medicine feeding assembly is rotationally arranged in an inner cavity of the containing barrel and comprises a rotating disc and an aluminum phosphide containing assembly used for containing the aluminum phosphide tablets. The circulating fumigation pipeline assembly is matched with the air adjusting valve assembly, the circulating fan and the aluminum phosphide medicine feeding mechanism, and effective phosphine circulating fumigation insecticidal treatment can be carried out on grains in the grain storage bin.

The utility model provides a production device of electronic-grade hydrogen phosphide. The production device comprises a full-automatic aluminum phosphide feeding system, a sulfuric acid metering tank, a constant-temperature reaction kettle, a purification cooling system, a heavy component removal purification column, a cold trap collection device, a light component removal purification column, a low-temperature filling system, an inert gas purging system, a vacuum system and a tail gas treatment system. The method comprises the following steps: quantitatively adding aluminum phosphide into a constant-temperature reaction kettle, slowly adding sulfuric acid into the constant-temperature reaction kettle through a metering tank, reacting to generate hydrogen phosphide gas, and removing particulate matters, acid mist, moisture, arsenic hydride, hydrogen sulfide, carbon dioxide, carbon monoxide, alkane, silane and ethylene in the hydrogen phosphide gas through pre-cooling, deep cooling, heavy component removal, cold trap and light component removal to obtain the electronic-grade hydrogen phosphide special gas with the purity of 99.9999%. And feeding tail gas generated in the purification process into a tail gas treatment system, absorbing the tail gas through a two-stage tower, and discharging the tail gas after reaching the standard.

This utility model belongs to the field of aluminum phosphide tablet production technology, specifically relating to a pressing device for aluminum phosphide production. It includes a base, a storage box, and a telescopic pressure plate, as well as a forming disc and a storage cylinder. The forming disc is located inside the protective cylinder. A top plate, which mates with a groove on the top surface of the forming disc, is installed inside the forming disc via an electric telescopic rod. A pressure plate, which mates with the forming disc, is installed on the bottom plate of the telescopic pressure plate via a spring telescopic rod. The storage cylinder, which communicates with the bottom opening of the protective cylinder, is located on the base. By setting up the forming disc, pressure plate, and multiple feeding pipes, multiple aluminum phosphide tablets can be formed simultaneously, improving the production efficiency of aluminum phosphide tablets. By setting two fans on the protective cylinder, one fan, connected to a collection box, is used to collect the powder inside the protective cylinder, and the other fan is used to blow the formed aluminum phosphide tablets, enabling the simultaneous discharge of multiple tablets.

The invention relates to the technical field of granary insect killing treatment, and particularly discloses an aluminum phosphide residue treatment device which comprises a sleeve, a material conveying pipe is arranged at the upper end of the sleeve, a plurality of air holes are evenly formed in the sleeve, a spiral piece is arranged in the sleeve, a conveying rod is inserted in the sleeve, and a plurality of containing grooves are formed in the circumferential direction of the conveying rod. A spiral sleeve is arranged on the conveying rod; a collecting barrel is coaxially arranged at the lower end of the conveying rod, a round hole is formed in the middle of the collecting barrel, a pressing handle penetrates through the upper end of the conveying rod, a cleaning ring is arranged on a sleeve below the pressing handle, and a scraping piece is arranged on the inner wall of the cleaning ring. After a conveying rod enters the sleeve, the conveying rod can rotate and move downwards from top to bottom under the cooperation of a spiral piece and a spiral sleeve, so that gas generated by volatilization of pill-shaped aluminum phosphide is uniformly dispersed, aluminum phosphide is isolated from grains, and volatile aluminum phosphide residues are conveniently collected; the problem that after volatilization of aluminum phosphide is completed, the aluminum phosphide is retained in grains and cannot be treated is solved.

The invention relates to the technical field of hazardous waste disposal and utilization, in particular to a technological method for co-disposal of chromic anhydride waste and waste zinc phosphide, which comprises the following steps: dissolving chromic anhydride waste in a dissolving tank according to a certain solid-to-liquid ratio, and hydrolyzing chromic anhydride to generate chromic acid; the method comprises the following steps: adding a certain proportion of an inorganic acid solution into a chromic acid solution, and combining chromate ions with hydrogen ions to generate dichromate ions under an acidic condition; transferring the solution into a closed first-stage reactor, and slowly stirring; according to the method, firstly, the method is suitable for chromic anhydride waste and zinc phosphide waste, waste chromate, dichromate waste and aluminum phosphide waste can be used, harmless treatment of the hazardous waste can be completed, secondly, reagents used in the treatment process only need phosphoric acid, hydrogen peroxide and sodium hydroxide, ferrous sulfate is not used as a reducing agent, and the method is environmentally friendly. The production of a large amount of iron mud is avoided, and finally, the produced secondary waste can be recycled, so that the aim of turning waste into wealth is fulfilled.

The utility model relates to a squat silo capable of realizing pesticide application and fumigation of a conical hopper at the bottom, which comprises a barrel body, the conical hopper with a large upper part and a small lower part is arranged at the bottom of the barrel body, a discharge port is arranged at the bottom of the conical hopper, a discharge port valve capable of being opened and closed is arranged at the discharge port, and the squat silo further comprises a fumigation pipe vertically arranged in an inner cavity of the conical hopper. A fumigating gas outlet is formed in the pipe wall of the fumigating pipe, the fumigating pipe is fixed to the inner wall of the barrel squat silo through a connecting frame, a working cavity used for feeding an aluminum phosphide medicament or introducing fumigating gas is formed in the discharging port valve, and a fumigating pipe gas inlet is formed in the bottom of the fumigating pipe; a working cavity air outlet which is communicated with the working cavity and is used for being communicated with the fumigation pipe air inlet when the discharge port valve is in a closed state is formed in the discharge port valve. According to the squat silo capable of achieving pesticide application and fumigation of the conical hopper at the bottom, the concentration of fumigation gas in the conical hopper can be improved.

The utility model discloses a hydrogen phosphide tail gas treatment device. According to the technical scheme, the aluminum phosphide residual material recycling device comprises an air compression mechanism, a vacuum material suction mechanism, an aluminum phosphide residual material generation device, a fan circulation device and a control center. The air compression mechanism comprises an air compressor and a high-pressure air supply pipe connected with the air compressor; the vacuum material suction mechanism comprises a first vacuum material conveyor and a second vacuum material conveyor which are arranged in parallel, the aluminum phosphide residual material generation device comprises a first-stage reaction tank and a second-stage reaction tank which are connected in series, and the fan circulation device comprises a circulation fan communicated with the second-stage reaction tank; and the circulating fan is communicated with a circulating air duct system of a grain pile through a positive pressure end air inlet pipe and a return pipe. The scheme provided by the utility model is used for treating residual powder after deliquescence of aluminum phosphide for further thorough reaction, and poison gas after reaction is sent back to a grain pile for effective utilization.

The utility model discloses an aluminium phosphide tablet calcining device, relates to aluminium phosphide tablet calcining technical field, including the reaction chamber that is used for aluminium phosphide tablet calcining, also include calcining mechanism and compacting mechanism, the calcining mechanism includes the tank body, the tank body is installed in the top inner wall of reaction chamber, the inside top of tank body is fixedly equipped with the cover plate, and the compacting mechanism is equipped with the cover plate. The compacting mechanism comprises a mounting gear, the mounting gear is mounted in the middle of the inner wall of the cover plate, a cleaning plate is mounted on the outer side of the bottom of the mounting gear, a hydraulic cylinder is mounted at the top of the mounting gear, a fixed bent rod is mounted at the output end of the hydraulic cylinder, and a pressing plate is mounted at the bottom of the fixed bent rod. The cleaning plate can clean the inner wall of the tank body through rotation of the mounting gear, aluminum phosphide raw materials can be prevented from being attached to the inner wall of the tank body, meanwhile, the hydraulic cylinder works to enable the pressing plate to compact the raw materials at different positions of the top of the piston plate, and aluminum phosphide is calcined more sufficiently.

The utility model relates to the technical field of aluminum phosphide production, in particular to an aluminum phosphide tablet calcining furnace which comprises a calcining furnace body, a hearth arranged in the calcining furnace body, a furnace door hinged to the vertical side wall of the calcining furnace body, a placing plate horizontally and fixedly connected to the lower portion of the inner side wall of the furnace door, and a circular positioning groove formed in the top of the placing plate. A material mixing box is fixedly connected to the top of the calcining furnace body, the circumferential inner wall of the lower end of the material mixing box is of an inverted-cone-shaped structure, a channel is formed in the middle of the top face of the calcining furnace body, a feeding piece is arranged on the left side of the material mixing box, and a material mixing piece is arranged on the right side of the material mixing box; and a blocking piece for blocking the channel is arranged at the top of the calcining furnace body. The utility model has the following beneficial effects: the mixing uniformity of a mixture is greatly improved; automatic discharging of the aluminum powder and red phosphorus mixture is achieved, dust is prevented from hurting the body health of operators, and the closeness of the calcining furnace body is guaranteed. And the operation safety is greatly improved.

The utility model belongs to the technical field of aluminum phosphide tablet pressing, and particularly relates to an aluminum phosphide tablet efficient pressing device convenient to discharge, which comprises a pressing cylinder, a pressing disc is arranged above the pressing cylinder, a supporting material control assembly is arranged at the bottom of the pressing cylinder, and the supporting material control assembly comprises a material control disc, a first telescopic rod and a push-out scraping arc plate. The material control disc is located in the pressing cylinder to conduct pressing operation, and the material control disc leaves the interior of the pressing cylinder to conduct discharging operation; the material control disc is located in the pressing cylinder to conduct pressing operation, the material control disc leaves the pressing cylinder to conduct discharging operation, during discharging, when the material control disc corresponds to the push-out scraping arc plate, the push-out scraping arc plate can move along the surface of the material control disc under the action of a second telescopic rod, and when materials pass through a filtering plate and a collecting plate, the material control disc can move along the surface of the material control disc. Residual parts can be filtered through the filter plate, and pressed materials are located on the collecting plate, so that the next pressing is facilitated, and the pressing work is efficiently developed.

The utility model discloses an aluminum phosphide deliquescence rate detection device, and relates to the technical field of aluminum phosphide deliquescence rate detection, the aluminum phosphide deliquescence rate detection device comprises a machine body, the bottom end in the machine body is provided with a heating cavity, the rear side of the machine body is fixedly provided with a purification assembly, and the purification assembly is used for absorbing hydrogen phosphide gas generated by aluminum phosphide and purifying the hydrogen phosphide gas; a detection assembly is arranged in the machine body and used for detecting the deliquescence rate of aluminum phosphide, and the purification assembly comprises a box body. According to the hydrogen phosphide purification device, hydrogen phosphide gas remaining in the gas outlet cavity is conveyed to the bottom end of the interior of the purification box through the exhaust pipe, the hydrogen phosphide gas is absorbed by sodium hypochlorite to generate stable and harmless phosphates, the risk of the hydrogen phosphide gas is reduced, and the use safety is improved.

A vertical thin-film (VTF) light emitting diode (LED) having embedded contacts is described. The vertical thin-film (VTF) light emitting diode (LED) having embedded contacts has structure where the metal layer constitutes both bondpad(s) and associated electric contact to the semiconductor. The metal layer is embedded and, hence, no longer blocking light from the light emitting surface. The vertical thin-film (VTF) light emitting diode (LED) having embedded contacts comprises a plurality of group III-V semiconductor material layers, including binary, ternary, and quaternary alloys of gallium (Ga), aluminum (Al), indium (In), and phosphorus (P) and a multiple quantum well layer on a substrate. At least one ne of the plurality of group III-V semiconductor material layers comprise an aluminum indium phosphide (AlInP) layer or a low confinement layer (LCL) comprising aluminum indium gallium phosphide (AlInGaP)

This invention relates to an intelligent robot and method for applying aluminum phosphide to grain warehouses. The intelligent robot includes a walking chassis and a first manipulator and a second manipulator mounted on the chassis. The first manipulator has a flip-up pesticide storage and dispensing assembly connected to its end. The assembly includes a storage shell and a dispensing roller in a bottom slot. The first manipulator grips the pesticide bottle, and the second manipulator opens and closes the cap. By flipping the entire manipulator, the bottle is docked with the storage shell. Through changes in the manipulator's spatial posture, the robot utilizes gravity to achieve lossless return and sealed recovery of remaining pesticide. This invention solves the technical problems of pesticide jamming, uneven distribution, and difficulty in recovering highly toxic residues in existing technologies, achieving inherent safety and efficient, even application during fumigation operations.

The utility model belongs to phosphor bronze production technical field, concretely relates to a kind of phosphor bronze tablet reaction container of high mixing efficiency, including reaction tank, feeding mechanism, material bucket, the tank top of reaction tank is connected exhaust valve and mixing pipe, exhaust valve is connected exhaust pipeline and material bucket by three-way pipe, the both ends of feeding mechanism are connected nitrogen pipeline and mixing pipe respectively, the throat of venturi in feeding mechanism is connected lower three-way pipe by material extraction pipe, lower three-way pipe bottom end blind dead and top end intercommunication guide slot, guide slot top is connected material bucket bucket mouth by sanitary clamp, the variable diameter section part of material bucket is threadedly connected bucket cover, unscrambling cover subassembly is rotatably installed on lower three-way pipe, unscrambling cover subassembly transmission connection bucket cover. Through the cooperation of positive pressure nitrogen and venturi structure, safe negative pressure mixing feeding in the sealing system formed by reaction tank, feeding mechanism and material bucket is realized, and the safety of feeding and the uniformity of mixing are effectively improved.

The application provides a composite current collector, a preparation method thereof and a negative electrode-free battery. The composite current collector comprises a current collector substrate, and an aluminum fluoride layer, an aluminum phosphide layer and a conductive layer which are sequentially arranged on at least one side surface of the current collector substrate. The composite current collector provided by the application has improved sodium affinity and reduced risk of interface side reaction by the aluminum fluoride layer covering the current collector substrate. The sodium nucleation overpotential is reduced by the aluminum phosphide layer, thereby further improving the sodium affinity. The current distribution and sodium deposition effect are optimized by the conductive layer. Therefore, the composite current collector has excellent sodium deposition uniformity, the negative electrode-free battery containing the composite current collector has high initial coulombic efficiency and excellent cycle stability. In addition, the composite current collector has the advantages of simple structure, easily available raw materials and easy realization of large-scale production.

The invention provides a co-extrusion packaging material with a long-acting slow-release insecticidal function as well as a preparation method and application of the co-extrusion packaging material, and belongs to the technical field of insecticidal functional materials. The invention discloses a co-extrusion packaging material with a long-acting slow-release insecticidal function. The co-extrusion packaging material is composed of an outer surface layer, an insecticide composite layer and a controlled-release layer in sequence from outside to inside, the insecticide composite layer is composed of a resin matrix and aluminum phosphide particles, and the aluminum phosphide particles account for 5-30 wt% of the insecticide composite layer. The outer surface layer has high barrier property, can prevent hydrogen phosphide from dissipating too early, and prevents external water vapor from entering; the controlled release layer can regulate the release rate of hydrogen phosphide through a pore structure, and hydrogen phosphide is slowly released when being in contact with storage articles; according to the insecticide composite layer, microcapsules are wrapped by polymer melt, aluminum phosphide is prevented from making direct contact with the environment, completely-wrapped particles and partially-exposed particles of aluminum phosphide coexist, and the effect of continuously releasing insecticidal gas is achieved.

The utility model belongs to the technical field of aluminum phosphide crushing, and particularly relates to a high-safety aluminum phosphide reaction solid block crushing device which comprises an outer box body, a feeding hopper is arranged at the top of the outer box body, two movable plates are rotatably connected to the top of an inner cavity of the outer box body through torsional springs, two crushing rollers are arranged in the inner cavity of the outer box body, and the two movable plates are arranged on the outer box body. The bottom of the outer box body is movably connected with a movable box, and the two sides of the movable box are provided with a first winding bin and a second winding bin correspondingly. The space between the inner cavity of the outer box body and the feeding hopper can be shielded through the two movable plates, the sealing performance in the crushing process is guaranteed, the protective layer automatically covers the top of the movable box, the situation that crushed aluminum phosphide solid blocks in the movable box make contact with the external environment and workers can be avoided, and the working efficiency is improved. The safety in the crushing process is improved, meanwhile, toxic hydrogen phosphide can be converted into relatively harmless substances through a sodium hydroxide solution in the fixing groove, and the crushing safety is further improved.

The utility model discloses a tobacco warehouse aluminum phosphide fumigation pesticide application device which comprises a fixed column, a movable plate is arranged in the fixed column, a sliding groove is formed in the upper surface of the fixed column, the movable plate can slide in the sliding groove, one end of the movable plate extends out of the sliding groove, an installation block is arranged on the movable plate, and an installation column is arranged on the upper surface of the installation block. A lifting plate is arranged on one side of the mounting column in the horizontal direction, a fumigation box is arranged below the lifting plate, a sealing tank is arranged above the lifting plate and fixedly communicated with the fumigation box through a gas conveying pipe, and the side wall of the fumigation box is fixedly communicated with a gas conveying hose for introducing carbon dioxide. According to the aluminum phosphide fumigating and pesticide applying device for the tobacco warehouse, the movable plate can slide, the fumigating box can be moved back and forth to be adjusted during fumigating and pesticide applying, the lifting plate can ascend and descend, the height of the fumigating box can be adjusted in real time, and the movable plate and the lifting plate are used in cooperation; and the height and position of the fumigation box can be conveniently moved and adjusted in real time, the pesticide application range is widened, and the fumigation pesticide application efficiency is improved.

The utility model discloses an adjustable rice disinsection machine used in the rice processing process, which comprises a machine shell, two groups of rice placing assemblies are arranged in the machine shell, each group of rice placing assembly comprises two groups of guide rails fixedly arranged in the machine shell, and the guide rails are connected with a placing frame; rice is placed in the placing frame, aluminum phosphide tablets are placed in the machine shell, generated aluminum phosphide gas conducts insect killing operation on the rice, in the process, the placing frame is driven by the shaking assembly to move leftwards, at the moment, the telescopic supporting column and the spring are stressed and compressed, then the placing frame is driven to move rightwards under the action of the restoring force of the spring, and the process is repeated. According to the rice disinsection machine, the rice can be shaken only by rotating the rotating shaft, then aluminum phosphide gas can make contact with all the rice conveniently, the disinsection efficiency is improved, the flowing speed of air in the machine shell can be increased through the fan, then the aluminum phosphide gas can rapidly flow in the machine shell, and the disinsection efficiency is further improved.

A vertical thin-film (VTF) light emitting diode (LED) having embedded contacts is described. The vertical thin-film (VTF) light emitting diode (LED) having embedded contacts has structure where the metal layer constitutes both bondpad(s) and associated electric contact to the semiconductor. The metal layer is embedded and, hence, no longer blocking light from the light emitting surface. The vertical thin-film (VTF) light emitting diode (LED) having embedded contacts comprises a plurality of group III-V semiconductor material layers, including binary, ternary, and quaternary alloys of gallium (Ga), aluminum (Al), indium (In), and phosphorus (P) and a multiple quantum well layer on a substrate. At least one ne of the plurality of group III-V semiconductor material layers comprise an aluminum indium phosphide (AlInP) layer or a low confinement layer (LCL) comprising aluminum indium gallium phosphide (AlInGaP).

The utility model provides a kind of aluminium phosphide particle size screening device, including box, the box bottom is equipped with elastic support column, the box top is equipped with feed inlet, the box is equipped with screening chamber, the screening chamber is equipped with particle size screening disc, particle size screening disc one end is equipped with hinged rotating part, particle size screening disc other end is equipped with discharge gate, particle size screening disc bottom is equipped with screen, particle size screening disc discharge gate bottom is equipped with electric telescopic link, particle size screening disc top is equipped with connecting frame and vibration motor, the screening chamber bottom is equipped with deflector and discharge hopper.The utility model is connected with the hinged connection dynamic inclination adjustment of electric telescopic link and particle size screening disc by multistage gradient screen, can conveniently adjust the horizontal inclination of particle size screening disc, make aluminium phosphide fully screen when particle size screening disc horizontal, then adjust gradient and let material enter next stage screening, ensure the fullness of screening and the smoothness of material transmission.

The utility model belongs to the technical field of metal processing, and particularly relates to an aluminum phosphide crushing device for producing aluminum phosphide powder, which comprises a shell, a crushing roller, an electric ejector rod and a screen and further comprises a temporary storage bin, a crushing bin and a feeding channel are arranged on the shell, the temporary storage bin is rotatably mounted on the crushing bin, and the feeding channel is communicated with the temporary storage bin. A plurality of material storage grooves are evenly formed in the temporary storage bin, the crushing rollers are arranged on the side walls of the two sides of a channel of the crushing bin, and the screening net matched with the temporary storage bin and the two electric ejector rods matched with the screening net are slidably installed on an opening in the bottom of the shell; by arranging the temporary storage bin rotationally installed on the outer side of the smashing bin and the screening net matched with the temporary storage bin, the stability of the temporary storage bin in the rotating process is guaranteed by arranging a limiting ring, by arranging an observation window, a user can conveniently determine the condition in the device, and by arranging a spring telescopic rod, the screening effect of the screening net on aluminum phosphide is guaranteed.

The utility model relates to a stirring and firing system for aluminum phosphide production, and belongs to the technical field of aluminum phosphide production. Comprising a furnace body arranged in a foundation pit and a powder mixing machine arranged above the ground, electric heaters are evenly arranged on the inner wall of the furnace body, a feeding port and a discharging port are formed in the powder mixing machine, a ground rail is arranged below the discharging port, and an electric self-walking rail car walking in the length direction of the ground rail is arranged on the ground rail. A firing inner container is further arranged in the furnace body, and the furnace further comprises a lifting device used for lifting the firing inner container. The utility model has the beneficial effects that raw materials for producing aluminum phosphide are mixed by utilizing the powder mixer, then the fired liner is transferred to the hoisting position by utilizing the electric self-walking rail car and is transferred into the furnace body by utilizing the hoisting device, and after the firing is finished, the fired liner is transferred into the furnace body by utilizing the hoisting device. The firing inner container in the furnace body and the reactants in the firing inner container can be transferred to the next working procedure through the lifting device, the connection of the previous working procedure and the next working procedure is smooth, and therefore the production efficiency is improved.

The invention discloses a waste aluminum phosphide and rotary kiln linkage safety disposal method and system, and relates to the technical field of hazardous waste disposal and recycling. The invention discloses a safe disposal method for linkage of waste aluminum phosphide and a rotary kiln. The safe disposal method comprises the steps that firstly, waste aluminum phosphide and water are added into a corrosion-resistant reaction kettle to be stirred and hydrolyzed, and hydrogen phosphide gas and residue slurry are obtained; and then the phosphine gas diluted by the nitrogen and the residue slurry are conveyed to a combustion area of the rotary kiln to be subjected to high-temperature oxidation sintering, residue particles are collected, incineration tail gas is subjected to multi-stage purification treatment, and the tail gas is discharged after being detected to reach the standard. According to the safe and harmless treatment method and system for the waste aluminum phosphide, through the pretreatment coupling high-temperature rotary kiln incineration technology, synchronous high-temperature oxidative decomposition of residues and hydrogen phosphide gas is achieved, toxicity and fire blast risks are thoroughly eliminated, closed operation and automatic control are achieved in the whole process, and safety, environmental protection and high efficiency are guaranteed.