308 results about "Yellow phosphorus" patented technology

The invention discloses a yellow phosphorus furnace electrode paste and a preparation method thereof, and belongs to the technical field of yellow phosphorus furnace production, the yellow phosphorus furnace electrode paste comprises the following raw materials by mass: 55-65% of anthracite particles, 20-25% of petroleum coke, 5-10% of graphite chips, 18-25% of a composite binder, 0.3-1.5% of a composite antioxidant and 1.5-4.5% of an additive; the yellow phosphorus furnace electrode paste provided by the invention is produced according to the preparation method provided by the invention, and the resistivity, compressive strength and oxidation resistance can be synchronously improved through the design of carbon material multistage particle size distribution, a nano-reinforced composite binder and a synergistic anti-oxidation system in combination with an efficient drying and densification process; the problem that an existing electrode paste is poor in density and performance is effectively solved.

The invention relates to the technical field of yellow phosphate rock powder clustering, in particular to yellow phosphate rock powder clustering equipment which comprises a base, a support is fixedly mounted at the top of the base, and spherical rotary drums are rotatably connected to the two sides of the inner wall of the support in a penetrating mode; a storage cylinder is fixedly mounted at the top of the support, a connecting pipe is rotatably connected into the storage cylinder in a penetrating mode, a quantifying cylinder is fixedly connected to the bottom of the connecting pipe, and a discharging assembly is arranged at the bottom of the quantifying cylinder. By arranging a quantitative barrel, a first through groove, a second through groove and a discharging assembly, the quantitative barrel is rotated to enable the first through groove to be aligned with the second through groove, an adhesive enters a connecting pipe through the first through groove and the second through groove, then the adhesive enters the quantitative barrel, scale marks are arranged outside the quantitative barrel, and after the liquid level in the quantitative barrel reaches a proper value, the adhesive is discharged. The quantitative barrel is rotated to enable the first through groove and the second through groove to be staggered, and the adhesive is quantitatively discharged into the spherical rotating barrel through the discharging assembly, so that the adding amount of the adhesive is controlled, and the agglomeration quality of the yellow phosphate rock powder is improved.

The invention discloses a phosphogypsum-based calcination-free low-carbon cementing material and a preparation method thereof. The phosphogypsum-based calcination-free low-carbon cementing material comprises the following components in percentage by weight: 10%-35% of phosphogypsum, 10%-35% of desulfurized gypsum, 5%-20% of sewage treatment sludge, 10%-35% of fly ash, 10%-35% of yellow phosphorus slag and 5%-20% of phosphorus tailing slag. The total amount of the ardealite and the desulfurized gypsum is controlled within 45%, and the total amount of the fly ash and the yellow phosphorus slag is controlled within 45%. The technical problems that an existing phosphogypsum-based cementing material is low in early strength, poor in performance stability and high in cost are effectively solved through a multi-solid-waste synergistic compatibility design and a calcination-free process.

The application discloses a preparation method of high-purity yellow phosphor, which comprises the following steps: (1) adding pure water into a reaction kettle, adding liquefied yellow phosphor under the condition of heat preservation, starting a stirrer in the reaction kettle, and repeatedly rinsing the yellow phosphor to remove floating impurities; (2) introducing the rinsed yellow phosphor into a circulating fluidized bed reactor provided with a catalyst bed after fully mixing the yellow phosphor with an oxidizing agent through a mixer, fully contacting a mixed fluid of the yellow phosphor and the oxidizing agent with catalyst filling materials in the catalyst bed, and performing an oxidation-reduction reaction; (3) after the oxidation-reduction reaction is completed, the yellow phosphor is flowed back to the reaction kettle from the circulating fluidized bed reactor, and the yellow phosphor flowed back to the reaction kettle is pumped into the circulating fluidized bed reactor to circulate the above oxidation-reduction reaction; and (4) after the reaction is completed, the liquefied industrial yellow phosphor in the reaction kettle is left to be stratified, impurities are removed, refined yellow phosphor is separated, and high-purity yellow phosphor is obtained by rinsing with high-purity water.

The preparation method comprises the following steps: firstly, dissolving a carbon carrier and a nickel source in deionized water, and uniformly mixing the carbon carrier and the nickel source in an ultrasonic manner to obtain dark green turbid liquid; drying the dark green turbid liquid to obtain a dark green solid; roasting and screening the dark green solid to obtain a precursor with nickel oxide; putting the precursor into a quartz tube, putting the quartz tube into a tubular furnace, introducing hydrogen phosphide gas into the tubular furnace, and phosphating to obtain a NixPy electrocatalyst; the method is low in preparation cost, short in time and simple in process, the problem of yellow phosphorus tail gas emission is effectively solved, and production of green energy is promoted; the electrocatalyst has a good application prospect in the field of hydrogen production through electrocatalytic water decomposition.

The invention discloses a multi-source solid waste-based cementing material and a preparation method thereof, and relates to the technical field of solidified organic matter soft soil cementing materials. The cementing material is prepared from the following raw materials: carbide slag, desulfurized fly ash, yellow phosphorus slag, high-activity and high-stability steel slag, modified red mud, alkaline residues, desulfurized gypsum, mineral slag and calcium sulphoaluminate; the high-activity and high-stability steel slag is prepared by carrying out steel slag preliminary stabilization treatment and steel slag excitation activation on liquid steel slag; exciting and activating the steel slag: preparing high-activity and high-stability steel slag from the stabilized steel slag, the modified ettringite particles, aluminum sulfate, a polycarboxylate superplasticizer, hexadecyl triethyl ammonium bromide and potassium hydroxide; the modified red mud is prepared from red mud, magnesium hydroxide, N-methyldiethanolamine, desulfurized fly ash, calcium oxide and a ferric chloride solution; the modified ettringite particles are prepared from polyvinyl alcohol and N-beta-aminoethyl-gamma-aminopropyl trimethoxy silane as a modifying agent. The preparation method comprises the following steps: preparing the modified ettringite particles; according to the multi-source solid waste-based cementing material, the compressive strength and the water stability coefficient of the solidified organic matter soft soil are effectively improved.

The invention discloses a method for smelting yellow phosphorus and alloy by using high-magnesium low-grade phosphorite, which comprises the following steps of: proportioning the high-magnesium low-grade phosphorite, a calcium flux, a siliceous flux, iron ore and a carbonaceous reducing agent, and carrying out reduction smelting treatment, so that part of apatite is reduced to generate yellow phosphorus steam, and part of phosphorus steam and reduced iron are chemically combined to form the alloy; calcium oxide, magnesium oxide, silicon oxide and aluminum oxide form low-melting-point smelting slag, and activated slag is obtained through water quenching. The method can provide technical reference for efficient resource utilization of low-grade phosphorite, especially high-magnesium and high-iron type low-grade phosphorite, three products of high-quality yellow phosphorus, high-added-value ferrophosphorus and activated smelting slag are obtained at the same time, and no new solid waste is generated in the process.

The invention relates to the technical field of curing agent preparation, in particular to a seawater-corrosion-resistant high-strength marine silt curing agent and a preparation method thereof.The curing agent is prepared from, by mass, 40-60 parts of a main body material, 10-15 parts of an activating agent, 2-8 parts of a coagulant and 2-5 parts of modified nano calcium carbonate; the main material is one of yellow phosphorus slag micro powder, magnesium smelting slag micro powder and blast furnace slag micro powder; the activating agent is one of phosphorus slag Portland cement, alkali-making white mud and papermaking lime slag; the coagulant is one of sodium chloride, magnesium chloride, potassium sulfate and magnesium sulfate. According to the prepared curing agent, the compactness of a cured sample can be improved, invasion of ions in seawater is reduced, nano calcium carbonate is coated with polydopamine, dispersion is uniform, and the subsequent hydration process is optimized.

The present invention belongs to the technical field of phosphorus pentafluoride preparation, and specifically relates to a method for synthesizing phosphorus pentafluoride by using yellow phosphorus and fluorine gas. The synthesis method comprises the steps of dissolving yellow phosphorus in an inert solvent to prepare a yellow phosphorus solution, then passing the yellow phosphorus solution and fluorine gas into a microchannel reactor for mixed reaction, and separating and purifying the generated gaseous product through a pressurized condensation system to obtain phosphorus pentafluoride. The synthesis method of the present invention utilizes a specific inert solvent to dissolve highly reactive yellow phosphorus, and then continuously synthesizes phosphorus pentafluoride by reacting the yellow phosphorus solution with fluorine gas in a microchannel reactor through a gas-liquid phase reaction. The method has the advantages of low reaction temperature, high reaction efficiency, few reaction by-products, and high product yield.

The utility model discloses a yellow phosphorus filling lifting platform which aims at solving the problems that an existing loading platform is not matched with a tank car, and the operation risk of personnel is large. The platform comprises a filling frame and a lifting platform capable of vertically sliding, the filling frame and the lifting platform are connected through a servo electric cylinder, the filling frame is provided with a guide structure, a guardrail and an anti-collision assembly, and the anti-collision assembly is in control connection with the servo electric cylinder. A connecting beam is arranged on the top of the lifting platform, and servo electric cylinders are arranged on the two sides in pairs and connected through connecting rods. A mounting seat of the filling frame is provided with a limiting bearing and a limiting notch. The anti-collision assembly comprises an anti-collision rod and a limiting switch. The platform can adapt to different tank trucks through the lifting platform and the servo electric cylinder, so that people can get on and off the truck conveniently; the operation safety is improved through a guardrail and a lifting function; a servo electric cylinder, a connecting beam and the like guarantee stable lifting; the anti-collision assembly can prevent equipment from being damaged. The existing problems are effectively solved, and the safety and convenience of yellow phosphorus filling operation are improved.

The utility model discloses a yellow phosphorus electric furnace slag quenching device which comprises a slag flushing pool, the slag flushing pool is connected with a liquid inlet of a slag flushing box through a slag flushing pipe, a slag flushing valve and a slag flushing pump are sequentially arranged on the slag flushing pipe, a feeding port in the top of the slag flushing box is connected with a molten slag outlet pipe, and an outlet of the slag flushing box is connected with an inlet of a slag melting pool. A reflux inlet is formed in the bottom of the slag melting tank and connected with an inlet of the slag bin through a reflux pipeline, an outlet of the slag bin is connected with an inlet of the slag flushing tank through a pipeline, and a screen is further arranged in the slag melting tank; according to the utility model, large-particle slag can be intercepted on the upper surface of the screen through the screen and waits for continuous dissolution, and the slag which is dissolved into small particles falls down along screen holes of the screen, so that the phenomenon that the large-particle slag blocks a backflow pipeline, a slag flushing pipe, a valve and a pump can be avoided, and the service life of the slag flushing pipe is prolonged. The abrasion to the valve plate is correspondingly reduced, and the production efficiency is improved.

The application discloses a multi-layer dispersion combustion, high-efficiency energy-saving yellow phosphorus tail gas low-nitrogen burner and a multi-stage combustion method, and belongs to the technical field of energy saving and environmental protection. The mounting flange of the burner is connected with a furnace chamber. The burner comprises a cylinder body, the cylinder body is divided into a fuel cavity and a combustion-supporting cavity which are relatively independent through a transverse partition plate, the fuel cavity is used for conveying yellow phosphorus tail gas, and the combustion-supporting cavity is used for conveying high-pressure and high-speed combustion-supporting air. A center gun is arranged at the center of the cylinder body, an inlet end of the center gun is communicated with the fuel cavity, a plurality of layers of spray gun pipes are arranged, nozzles of a part of the spray gun pipes are staggered in height, and the nozzles of the spray gun pipes are oriented in different directions; a part of the spray gun pipes are provided with rotating blades; an air automatic rotating assembly is arranged at the outer periphery of an outlet end of the center gun and is communicated with the combustion-supporting cavity, and the air automatic rotating assembly is used for automatically and rapidly rotating the combustion-supporting air, so that the combustion-supporting air and the yellow phosphorus tail gas are fully mixed. The application solves the problems of yellow phosphorus tail gas ultra-low NOx and CO emission and yellow phosphorus tail gas blockage.

The utility model discloses a yellow phosphorus slag water quenching slag flushing tank, which belongs to the field of water quenching, and comprises a slag conveying device, a slag flushing tank mechanism and a slag flushing pool, a discharge port of the slag conveying device is connected with an inlet of the slag flushing tank mechanism through welding, and a flushing device is arranged on one side of the discharge port of the slag conveying device. Compared with the prior art, the device has the advantages that bodies of the fixed step groove A and the fixed step groove B are in contact connection and clamped with each other, and the groove opening of the fixed step groove A is located at the inner wall end of the slag flushing groove sub-groove feeding port; by means of the slope support, part of water spray cannot flow back into a gap between the fixed step groove A and the fixed step groove B when slag is flushed out, and due to the gradient of the slope support, it can be guaranteed that no water quenching solution remains in the slag flushing groove, and it is guaranteed that the slag flushing groove mechanism cannot leak water; due to the fact that the fixing column is connected with the slag flushing groove through hole in a sliding mode, the slag flushing groove can be freely detached.

The invention discloses a method for comprehensively recycling yellow phosphorus slag of an electric furnace, and belongs to the technical field of chemical engineering. Comprising the following steps: grinding slag, adding nitric acid in proportion, reacting dicalcium silicate in the slag with nitric acid to generate calcium nitrate and silicon slag, and reacting calcium nitrate with ammonium carbonate to prepare an ammonium nitrate product and a calcium carbonate product; and washing and separating the silicon slag to obtain orthosilicic acid, returning one part of orthosilicic acid to be re-blended with the phosphate ore to enter the furnace so as to recycle the slag, and calcining the rest part of orthosilicic acid to obtain a white carbon black product. The use amount of silica is reduced, mineral resources of silica are saved, and the use amount of silica produced from yellow phosphorus reaches self-balance.

The application discloses a kind of synthesis methods of high-purity electronic grade sodium hypophosphite, dilute phosphine gas is passed into to the mixed solution of sodium hypochlorite and sodium hydroxide that has been pre-cooled with sufficient stirring, and sodium hydroxide is added to carry out reaction;After reaction is completed, filtration, concentration, crystallization, separation are carried out, and the obtained product is purified by resin to obtain high-purity electronic grade sodium hypophosphite product.Compared with the traditional "yellow phosphorus-lime-soda" oxidation-reduction method for preparing industrial grade product and then preparing high-purity electronic grade sodium hypophosphite, the product purification difficulty of the application is low, by using 7N grade ultra-high purity phosphine without any metal impurities, the problem that arsenic, silicon, germanium, nickel, chromium and other metal impurities cannot be completely removed by traditional process can be effectively solved.In addition, the application also has the advantages of effectively solving the problem of three wastes, high recycling rate of by-products, high economy and the like.

The utility model relates to the technical field of environment-friendly treatment of industrial sewage, in particular to a yellow phosphorus production sewage circulating purification system, which is provided with a yellow phosphorus sewage tank, a multi-stage sedimentation mechanism, a concentration filtering mechanism and a clear liquid collecting tank which are sequentially arranged along a sewage treatment flow, the yellow phosphorus sewage tank is used for collecting yellow phosphorus production sewage; the multi-stage sedimentation mechanism is provided with a plurality of deep cone sedimentation machines which are arranged in series and are used for carrying out sedimentation separation on the conveyed yellow phosphorus sewage; the concentrating and filtering mechanism is used for concentrating and separating the conveyed settling floating liquid; and the clear liquid collecting tank is used for collecting the clear liquid separated by the concentrating and filtering mechanism and conveying the clear liquid to the phosphorus collecting tower through a water conveying pipe. Aiming at the special characteristics of yellow phosphorus production sewage purification treatment, the utility model constructs a closed circulation purification system, has the technical characteristics of greatly reducing the occupied area, being low in construction and operation cost and excellent in separation and purification effect, and has remarkable technical effect and economic benefit.

The invention discloses a selenium-rich rice mineral source soil conditioner and a preparation method thereof, and belongs to the technical field of soil conditioning materials. The conditioner comprises the following raw materials in parts by weight: 30-70 parts of biological activated yellow phosphorus slag, 1-1.5 parts of soluble selenium, 23-62 parts of an activating agent and 3-10 parts of a modifying agent. The method is characterized in that the biological activated yellow phosphorus slag is prepared by sequentially carrying out thermal activation and acid activation on yellow phosphorus slag and then carrying out solid-state fermentation by utilizing a compound microbial agent consisting of paenibacillus mucilaginosus, lactobacillus acidophilus and P.megatherium. Through unique biological activation modification, the industrial problems that a mineral source conditioner is low in granulation rate and slow in particle hardening and disintegration are solved in a synergistic mode, acid soil can be effectively improved, absorption and enrichment of rice on selenium are remarkably promoted, and high-added-value resource utilization of the yellow phosphorus slag is achieved.

A solid waste-based nano-hydrated calcium silicate nucleating agent, its preparation method, and its application in low-heat cement are disclosed. This invention belongs to the field of building materials technology. By weight, it comprises the following components: 10-30 parts of carbide slag, 20-45 parts of yellow phosphorus slag, and 400-2000 parts of sodium hydroxide solution. The calcium hydroxide content in the carbide slag is ≥80%. The silicon dioxide content in the yellow phosphorus slag is ≥35%, and the calcium oxide content is ≥40%. The pH value of the sodium hydroxide solution is 11-12. This invention uses carbide slag, yellow phosphorus slag, and sodium hydroxide solution as raw materials to synthesize a solid waste-based nano-hydrated calcium silicate nucleating agent. Utilizing its nano-sized hydrated calcium silicate as a seed crystal in the early stage of hydration in low-heat cement, it can provide nucleation sites for the hydrated calcium silicate gel, a product of low-heat cement hydration, reducing the nucleation barrier of the hydrated calcium silicate gel, promoting the hydration rate and early strength development of low-heat cement, and providing strong support for the later strength development of low-heat cement, effectively improving the problem of drying shrinkage cracking in low-heat cement.

The utility model relates to the technical field of heat energy recovery, and discloses a yellow phosphorus combustion heat energy recovery device which comprises a combustion tower, a gas conveying pipe is fixedly connected to the interior of the combustion tower, a filter box is fixedly connected to the outer wall of the gas conveying pipe, a filter screen is arranged in the filter box, a connecting pipe is fixedly connected to the interior of the filter box, and the connecting pipe is fixedly connected to the outer wall of the gas conveying pipe. An air blower is fixedly connected to the outer wall of the connecting pipe, a conveying pipe is fixedly connected to the interior of the air blower, a heating box is fixedly connected to the outer wall of the conveying pipe, a water outlet pipe is fixedly connected to the interior of the heating box, and a water supply assembly is arranged on the outer wall of the heating box and used for providing a water source. High-temperature waste gas enters the filter box through the connecting pipe, is filtered through the filter screen and enters the heating box through the connecting pipe, the air blower and the conveying pipe, the water pump is started to convey a water source to the heating box, the high-temperature waste gas is used for heating the water source, the effects of recycling the high-temperature waste gas and achieving gradient utilization of waste heat are achieved, and the heat energy utilization rate is increased.

The present invention discloses a three-phase water film cold washing purification process and device for yellow phosphorus electric furnace tail gas, belonging to the technical field of yellow phosphorus tail gas purification. The present invention solves the problem that yellow phosphorus tail gas is easy to clog the pipe. The present invention passes the yellow phosphorus tail gas into a cooler that realizes cooling by heat exchange with cooling water, so that the yellow phosphorus in the yellow phosphorus tail gas condenses in the heat exchange channel; when the purification time reaches the set time, the cooling of the cooling water is stopped, and cold washing liquid is sprayed into the heat exchange channel, so that the cold washing liquid replaces the cooling water to perform heat exchange with the yellow phosphorus tail gas, so that the yellow phosphorus at the innermost side of the heat exchange channel is melted, and the cold washing liquid can flush the condensed yellow phosphorus in the heat exchange channel. The technical solution of the present invention not only greatly improves the removal effect when removing yellow phosphorus in the shell and tube cooler, but also the removal rate of yellow phosphorus in the yellow phosphorus tail gas can be maintained at more than 70%.

The invention provides a yellow phosphorus furnace gas dry electrostatic dust collection method which is applied to a dust collection system and comprises the following steps: acquiring the oxygen concentration and temperature in the dust collection system; whether the oxygen concentration meets a preset threshold value or not is judged, and when the oxygen concentration meets the preset threshold value, preheating equipment is started to preheat the dust removal system; whether the temperature in the dust removal system reaches the yellow phosphorus dew point temperature or not is judged; when the temperature reaches the yellow phosphorus dew point temperature, dust removal equipment is started; and a gas inlet pipeline of the preheating equipment is started, so that the yellow phosphorus furnace gas enters the dust removal equipment after being preheated by the preheating equipment, and enters the phosphorus receiving tower for collection after being subjected to dust removal. According to the scheme, dust in the yellow phosphorus furnace gas can be effectively removed, so that yellow phosphorus is further purified, the output of phosphorus sludge is reduced, and the environmental benefit is remarkable.

The present invention provides a method for preparing red phosphorus under vacuum, belonging to the field of vacuum metallurgy. The present invention provides a method for preparing red phosphorus under vacuum, comprising the following steps: subjecting yellow phosphorus to vacuum distillation to obtain a vapor containing yellow phosphorus; converting the vapor containing yellow phosphorus to obtain the red phosphorus; the temperature of the vacuum distillation is 50 to 100 °C, the vacuum degree is 1 to 10 Pa, and the heat preservation time is 60 to 120 min. The present invention utilizes the differences in melting and boiling points of various impurities in industrial yellow phosphorus under vacuum conditions, and by controlling the distillation temperature, vacuum degree and heat preservation, the impurities are prevented from volatilizing while the yellow phosphorus volatilizes sufficiently, thereby improving the purity and yield of the product. The results of the examples show that when the method of the present invention uses 3N industrial yellow phosphorus as the raw material, the purity of the obtained red phosphorus can reach 5N, and the removal rates of As, Al, and Ca impurities are greater than 99%, and the removal rates of Na, Fe, and Cr impurities are greater than 90%.

The utility model discloses a multistage rectifying tower for refining yellow phosphorus, and relates to the technical field of yellow phosphorus refining. The multistage rectifying tower for yellow phosphorus refining comprises a lower tower body, a mounting skirt, a middle tower body, an upper tower body, an upper sealing cover and a lower sealing cover, the mounting skirt is connected to the bottom end face of the lower tower body, the middle tower body is connected to the top end face of the lower tower body, and the lower sealing cover is connected to the inner side of the joint of the lower tower body and the mounting skirt and seals the lower tower body and the mounting skirt. The upper tower body is connected to the top end face of the middle tower body and communicated with the interior. According to the multi-stage rectifying tower for refining yellow phosphorus, the distribution cap with the overhead lower part and dense holes in the surface is designed into a unique structure, so that the problem that a gas-liquid contact interface and a heat exchange area of a traditional tower tray are insufficient is effectively solved; the lower part of the distribution cap is overhead to form an independent steam channel, so that rising steam is pre-dispersed through an overhead space and then uniformly enters a tray liquid layer through dense holes in the surface.

The application discloses a multi-source solid waste efficient phosphorus and fluorine fixing agent and application thereof; the composition and weight parts of the multi-source solid waste efficient phosphorus and fluorine fixing agent are as follows: 5-15 parts of yellow phosphorus slag, 5-15 parts of fly ash, 5-15 parts of steel slag and 2-20 parts of cement; the main raw material of the multi-source solid waste efficient phosphorus and fluorine fixing agent is industrial solid waste; the alkaline component in the main raw material can effectively adjust the pH value of an application system, is favorable for the progress of a hydration reaction, can wrap soluble phosphate and solidify water-soluble fluorine, is convenient to use, and the coupling agent mixed with different particle size raw materials is favorable for the grading effect of cementing materials, fills pores and promotes the strength development of the cementing materials; the phosphorus and fluorine fixing agent can remove more than 95% of soluble phosphorus and more than 95% of water-soluble fluorine, and can be widely applied to the preparation of cementing materials and the ecological filling and utilization of long-term environmental risk controllable industrial solid wastes containing phosphorus and fluorine as main raw materials, so that the bulk application of solid wastes can be realized.

The utility model discloses an automatic reduction device for vaporizing phosphorus trichloride and premixing the vaporized phosphorus trichloride with hydrogen in proportion, relates to the technical field of compound reduction reaction devices, and aims to solve the problem of low yellow phosphorus yield caused by insufficient reduction reaction of phosphorus trichloride and hydrogen. According to the device, an automatic parameter control cabinet is electrically connected to an automatic reduction device, the bottom end of a first reaction kettle is communicated with a hydrogen inlet pipeline through a pipeline, a hydrogen premixing and dispersing device is arranged at the bottom in a cavity of the first reaction kettle, and a plurality of premixing and heating devices are arranged on the outer wall of the first reaction kettle; the top end of the first reaction kettle is connected with a premixing gas-liquid separator through a pipeline, the premixing gas-liquid separator is mounted in a cavity of the second reaction kettle, and one side of the bottom of the first reaction kettle is connected with the second reaction kettle through a pipeline provided with a stop valve; the bottom end of the second reaction kettle is communicated with a phosphorus trichloride liquid inlet pipeline through a pipeline, and the top end of the second reaction kettle is connected with a premixed gas reduction pipeline.

The invention discloses a device and a process for recovering yellow phosphorus in phosphorus sludge based on multistage flash evaporation continuous evaporation. The device comprises a pretreatment system, a drying-pyrolysis-evaporation integrated system and a product recovery and treatment system, phosphorus slurry is pretreated in the pretreatment system in a steam crushing and mixing mode and then enters the drying-pyrolysis-evaporation integrated system for precise temperature control through gradient electromagnetic heating, and the product recovery and treatment system is used for recycling the phosphorus slurry. And finally, the yellow phosphorus enters a product recovery and treatment system, so that the yellow phosphorus and phosphorus-free residues are recovered. According to the device and the process, phosphorus slurry can be uniformly fed in the whole process, phosphorus is evaporated thoroughly, and the yellow phosphorus recovery rate reaches 95% or above; the equipment sealing performance is good, and the risk of ignition caused by spontaneous combustion of yellow phosphorus is effectively avoided; the phosphorus sludge processing capacity reaches 0.5-1.0 ton per hour, continuous and stable operation can be performed for more than 720 hours, and the recycled residues are uniform in granularity and can be used for production of phosphate fertilizers, cement and the like, so that resource recycling is realized.

The invention discloses a method for preparing yellow phosphorus from refractory siliceous phosphorite, and solves the technical problem of how to improve the suitability of refractory siliceous phosphorite powder. Comprising the following steps: a) adding a pretreatment adhesive into refractory siliceous ground phosphate rock, then carrying out wet grinding pretreatment to obtain wet fine powder, and then carrying out first heating treatment on the wet fine powder to obtain dried pretreated mineral powder; b) mixing the pretreated mineral powder with a forming adhesive and water to obtain a mixed material, and then carrying out compression molding on the mixed material to obtain phosphate rock green pellets; c) carrying out second heating treatment on the green phosphorite pellets to obtain dried and solidified phosphorite pellets; d) the phosphorite pellets, a carbonaceous reducing agent and a siliceous flux are mixed and then fed into an electric furnace to be smelted, and furnace gas containing yellow phosphorus steam is generated; e) dedusting and purifying the furnace gas, and condensing the dedusted and purified furnace gas so as to recover yellow phosphorus and produce tail gas rich in carbon monoxide; wherein the pretreatment of the adhesive and the wet grinding pretreatment are cooperated.

The application discloses a catalytic flue gas treatment device and a yellow phosphorus tail gas purification system, and aims to solve the technical problem of reducing the hidden danger of oxygen supplement to the flue gas to be treated during the operation of the catalytic flue gas treatment device. The device comprises a reaction system, a regeneration liquid circulation system and a flue gas conveying system, and further comprises an oxygen supplement system. The oxygen supplement system comprises a second air blower, an airflow adjusting device and an oxygen supplement gas distribution pipe network. The second air blower and the airflow adjusting device are connected with each reactor through the oxygen supplement gas distribution pipe network, so that the airflow generated by the second air blower is adjusted in flow by the airflow adjusting device, and then forms the oxygen supplement gas and enters the flue gas to be treated in the corresponding reactor. The oxygen concentration in the oxygen supplement gas is greater than that in the flue gas to be treated before the mixed oxygen supplement gas. The safety hidden danger possibly caused by the external mixing of the oxygen supplement in the reactor is avoided.

The utility model discloses a water-gas mixing automatic regulation type yellow phosphorus slag water-quenched slag granulation system, which comprises a water supply system, a gas supply system, a submerged arc furnace and a granulator, the gas supply system comprises an air compressor, a pressure tank and a gas pipe, one end of the gas pipe is communicated with the granulator, the air compressor and the pressure tank are connected with each other through the gas pipe, a one-way valve is arranged between the pressure tank and the air compressor, and the one-way valve is connected with the granulator. An air pressure adjusting system is arranged between the granulator and the pressure tank; the water supply system comprises a sedimentation tank, a water pump, a vacuum pump and a water pressure adjusting system which are sequentially communicated through water pipes; a filter is arranged between the sedimentation tank and the water pump; one ends of the water supply system and the gas supply system are jointly communicated with the granulator, and a cleaning system is arranged between the water supply system and the gas supply system; the granulator is arranged below the slag chute to impact the slag water for granulation; according to the utility model, the gas supply system and the water supply system are matched to supply gas and water to the pelletizer to form a water-gas mixture, and the water-gas mixture is sprayed out by the pelletizer to carry out slag quenching and pelletizing on yellow phosphorus slag water flowing out of the slag chute.

The utility model discloses a kind of yellow phosphorus recovery cooling devices, belong to yellow phosphorus recovery cooling technical field, can adapt to yellow phosphorus steam flow variation or different adhesion characteristics recovery scene, effectively reduce the residual of inner wall at the same time, avoid damage to equipment due to excessive knocking force, balance cleaning effect and equipment life.The yellow phosphorus recovery cooling device includes mounting bracket, cooling cylinder for cooling is installed on mounting bracket, cooling cavity is opened in cooling cylinder inside, evaporator pipeline is installed in the cooling cavity of cooling cylinder, refrigeration assembly is installed in the top of mounting bracket and is communicated with evaporator pipeline, air inlet pipe is installed in the top of cooling cylinder, exhaust pipe is installed in the bottom of one side of cooling cylinder;Collecting cylinder is set in the below of cooling cylinder on mounting bracket, discharge pipe is installed in the bottom of mounting bracket, telescopic communication pipe is installed in the top of collecting cylinder, discharge pipe and telescopic communication pipe are cooperatively installed between.