139 results about "Yellow phosphorus" patented technology

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 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 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 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 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 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.

The utility model relates to the technical field of boilers, in particular to a special yellow phosphorus tail gas burning boiler capable of reducing the oxygen content of flue gas, which comprises a yellow phosphorus tail gas storage tank, a desulfurization and dephosphorization agent storage bin and a hearth, a primary air chamber is mounted at the bottom end of the hearth, and an under-bed ignition and flue gas yellow phosphorus tail gas burner is mounted on the side wall of the primary air chamber. A yellow phosphorus tail gas storage tank is communicated with an under-bed ignition and flue gas yellow phosphorus tail gas burner through a pipeline, a desulfurization and dephosphorization agent conveyor is installed at the bottom end of a desulfurization and dephosphorization agent storage bin and communicated with the bottom end of a hearth through a pipeline, and two yellow phosphorus tail gas burners are fixedly installed on each of the two sides of the hearth. A secondary air box communicated with the interior of the hearth is further installed on the side wall of the hearth, a separator is fixedly installed on the outer side of the top end of the hearth, and a material returning device communicated with the bottom end of the hearth is installed at the bottom of the separator.

The invention relates to the technical field of yellow phosphorus slag utilization, and discloses a process for producing a silicon-calcium fertilizer by using yellow phosphorus slag, which is characterized in that the yellow phosphorus slag is used for preparing a SiO2 product, and then the yellow phosphorus slag, a calcium adjusting material, a siliceous optimizing material, a binder and a functional additive are mixed and granulated to form the silicon-calcium fertilizer. According to the scheme, through the synergistic effect of chemical activation and thermal activation, the existence form and release characteristics of nutrients are fundamentally changed, so that the fertilizer meets the growth cycle requirements of crops, and the problems that a traditional silicon-calcium fertilizer is insufficient in release in season and ineffective in later-stage residue are solved; the physiological functions of the silicon element in the aspects of enhancing the mechanical strength of plants, resisting diseases and insect pests, resisting lodging and the like are fully exerted.

The application discloses a liquid phosphorus production system, a yellow phosphorus furnace gas treatment system and a phosphoric acid production method. The liquid phosphorus production system is used for treating yellow phosphorus furnace gas and outputting liquid phosphorus, and comprises a heating device used for heating treatment of the furnace gas and outputting heated gas, a feeding device used for inputting conditioning powder into the heated gas and outputting mixed gas, wherein the conditioning powder comprises inorganic oxide powder used for absorbing moisture and acidic components in the heated gas, a filtering device used for gas-solid separation treatment of the mixed gas and outputting clean gas, and a condensing device used for condensing phosphorus vapor in the clean gas into liquid phosphorus. The liquid phosphorus production system of the application can absorb moisture and acidic components in the furnace gas by adding conditioning powder into the furnace gas, can inhibit occurrence of side reactions, can effectively prevent filter medium from forming a film, adsorption or phase change, can delay filter medium blockage, and can significantly reduce operation cost.

The utility model relates to welding device technical field especially relates to a kind of welding device of high sealing property large-scale yellow phosphorus storage tank. It is mainly aimed at the welding of large-scale yellow phosphorus storage tank bottom edge due to dependence on manual operation, there is high technical requirement to welder, is susceptible to individual difference and environmental factor influence, welding quality is unstable, the problem that sealing property is difficult to guarantee and big security risk, the following technical scheme is proposed, including at least one group of moving plate, the welding gun is provided above the moving plate;Guiding mechanism is set in the moving plate near the side of storage tank, the guiding mechanism is used to guide moving plate;Position adjusting assembly is installed on the top of the moving plate, the position adjusting assembly is used to drive welding gun to move to complete welding operation;Distance sensing mechanism is set on the side of the welding gun. The utility model reduces the risk of accident caused by yellow phosphorus leakage, guarantees storage transportation safety, and meets the demand of large-scale storage tank batch production simultaneously.

The present application relates to solid waste resource utilization technical field, the present application discloses a kind of preparation method and application of artificial organic soil based on yellow phosphorus slag, comprising the following steps: 1) modified yellow phosphorus slag, 2) modified humus, 3) compounding, the modified yellow phosphorus slag is mixed with modified humus, appropriate amount of water is added while mixing, stationary, obtain mixed material, drying, by pulverizer grinding and mixer stirring, obtain artificial organic soil;The present application solves the problem of soil resource deficiency and yellow phosphorus slag resource utilization, not only can improve the capacity of soil resources, but also can break through the bottleneck of yellow phosphorus slag resource utilization.

The present application relates to a kind of methods for preparing eutectic molecular sieve with yellow phosphorus slag, specifically, after dry yellow phosphorus slag is ground and sieved, yellow phosphorus slag powder is obtained;Yellow phosphorus slag powder and NaOH are mixed uniformly, placed in a muffle furnace and calcined, removed and placed in water for rapid cooling, solid-liquid separation, NaAlO2 is added in liquid, stirred and mixed uniformly, then transferred to a reaction kettle for hydrothermal crystallization reaction, solid-liquid separation, and the eutectic molecular sieve is obtained by washing and drying the solid;The eutectic molecular sieve is used for adsorbing heavy metals in wastewater, and the material has good adsorption performance for heavy metal pollutants in wastewater, which can realize the purpose of waste treatment.

The invention relates to the technical field of industrial solid waste recycling and road engineering materials, and discloses a multi-solid-waste composite roadbed material and a preparation method thereof.The preparation method specifically comprises the steps that on the basis of the Schiff base condensation reaction mechanism, aldehyde group functionalized light-stable montmorillonite and octa-phenylamino-POSS functionalized asphalt which are researched and developed independently are subjected to chemical bonding type compounding, and the composite roadbed material is obtained; the high-performance asphalt is prepared; high-performance asphalt is emulsified to obtain high-performance emulsified asphalt, the high-performance emulsified asphalt and cement are used as organic-inorganic composite gelling components, an industrial solid waste system composed of ardealite, titanium gypsum and yellow phosphorus slag is immobilized, and the multi-solid-waste composite roadbed material is prepared and shows excellent ultraviolet aging resistance. And the compressive strength can meet the technical requirements of cement stabilizing materials for heavy traffic load grade bases of expressways and first-grade highways in JTG D50-2017 on 7d unconfined compressive strength of 4.0-6.0 MPa.

The invention discloses a preparation method and application of a non-water-soluble medium element fertilizer containing fructooligosaccharide and modified yellow phosphorus slag, and relates to the technical field of chemical waste resource utilization and fertilizer synergism. The fertilizer comprises the following raw materials in parts by weight: 40-50 parts of molasses fermentation liquor containing fructooligosaccharide, 35-45 parts of modified yellow phosphorus slag, 1-3 parts of a dispersing agent and 2-5 parts of an emulsifying agent, the preparation method comprises the following steps: mixing the molasses fermentation liquor containing fructooligosaccharide with the modified yellow phosphorus slag, carrying out wet grinding until the particle size is 3-8 microns, adding the dispersing agent and the emulsifying agent, and uniformly mixing and stirring to obtain the molasses-containing emulsion. The fertilizer not only has high fertilizer efficiency, but also has the effect of passivating soil heavy metals.

The utility model discloses an insulating fixed connecting device for a hanger rod of a self-baking type electrode holder of a yellow phosphorus furnace, which comprises an upper-layer insulating stainless steel plate and a lower-layer insulating stainless steel plate which are respectively welded with a stainless steel lifting lug to form a body. The lifting lug is hinged with the lifting sling chain and the self-baking type electrode holder suspender through a stainless steel pin shaft, a lifting lug HP-5 mica pad and a cotter pin respectively; and the middle HP-5 mica plate is fixed with the stainless steel plate through the double-end stud, the steel plate HP-5 mica pad, the spring washer and the nut to form an integral structure. According to the utility model, insulation, antimagnetic and anti-conduction are realized in a high-temperature smelting environment, an electric breakdown path is blocked, vibration impact is reduced through design, the structural stability is improved, and the maintenance cost is reduced. The service life of the device is remarkably prolonged, and equipment damage caused by electric conduction and vibration is reduced.

The invention relates to the technical field of yellow phosphorus chemical industry, in particular to a preparation process of food-grade high-purity sodium pyrophosphate, which sequentially comprises the steps of raw material screening and pretreatment, proportioning and dissolution, neutralization reaction, polymerization dehydration, purification and refining, and drying and crushing. By controlling the purity (the main content is greater than or equal to 98%) and the particle size (80-120 meshes) of the raw material sodium dihydrogen phosphate, the temperature (50-70 DEG C), the pH value (8.5-9.5) and the stirring parameters of the dissolution and neutralization stages, and introducing a heavy metal removal agent after dissolution, and adopting the process conditions of 160-180 DEG C and 0.1-0.3 MPa in the polymerization stage, the heavy metal removal agent is added to remove the heavy metal in the polymerization stage. And then active carbon decoloration, precise filtration, programmed cooling crystallization, vacuum drying and superfine grinding are combined to form a set of complete and controllable preparation process. The problems of insufficient product purity and more harmful impurities (such as heavy metal) residues caused by inaccurate process control in the prior art are effectively solved, efficient preparation and deep purification of sodium pyrophosphate are realized, and the product purity stably reaches 96.5% or above.

The invention relates to the technical field of yellow phosphorus chemical industry, in particular to a method for preparing sodium dihydrogen phosphate by purifying crude sodium pyrophosphate. Comprising the following steps: mixing a byproduct crude sodium pyrophosphate with water, filtering and separating filter residues containing sodium chloride to obtain a sodium pyrophosphate crude filtrate; adding phosphoric acid into the sodium pyrophosphate coarse filtrate, and obtaining sodium dihydrogen phosphate coarse liquid without side reaction after sodium pyrophosphate is completely hydrolyzed into sodium dihydrogen phosphate; adding a decolorizing agent into the sodium dihydrogen phosphate crude solution, removing organic pigments in the sodium dihydrogen phosphate crude solution and reducing the impurity content of iron ions to obtain a decolorized sodium dihydrogen phosphate solution; carrying out filter pressing treatment on the decolored sodium dihydrogen phosphate solution, and removing suspended solids, decoloring agent residues and trace insoluble impurities to prepare a clear and transparent sodium dihydrogen phosphate refined solution; through the mode, the effects of efficiently purifying the byproduct crude sodium pyrophosphate and converting the byproduct crude sodium pyrophosphate into high-quality sodium dihydrogen phosphate, realizing resource cyclic utilization of the byproduct and reducing the purchase cost of raw materials are achieved.

The utility model discloses a novel yellow phosphorus condensation and collection device, and relates to the technical field of yellow phosphorus condensation. The novel yellow phosphorus condensing and collecting device comprises a circulating water tank, coil pipes and a lifting structure, a fan is arranged in the circulating water tank, a frame plate is detachably installed on the outer wall of the fan, the coil pipes are arranged in the circulating water tank, the number of the coil pipes is five, the coil pipes are arranged at equal intervals front and back, an adding pipe is arranged on the left side of each coil pipe, and a discharging pipe is arranged on the right side of each coil pipe. And the lifting structure is arranged on the circulating water tank and the coil pipe. According to the novel yellow phosphorus condensing and collecting device, on one hand, the coil pipe is modularized, and meanwhile, the design that the coil pipe can ascend and descend and is convenient to disassemble and assemble is achieved, so that the maintenance efficiency of equipment is greatly improved, the coil pipe can be conveniently and regularly disassembled and cleaned later, and inconvenience caused by tedious cleaning to a user is avoided; the yellow phosphorus condensing and collecting device improves condensing efficiency and has energy-saving potential, so that the yellow phosphorus condensing and collecting device is more efficient in operation, more convenient to maintain and higher in adaptability.

The utility model relates to heat exchange equipment technical field, concretely relates to heat exchange equipment for yellow phosphorus production, including heat exchange equipment shell, the left side of heat exchange equipment shell top end installs the water inlet pipe, the right side of heat exchange equipment shell bottom end installs the water outlet pipe, the heat exchange equipment shell is fixed with the heat exchange pipe, still includes: filter mechanism, filter mechanism includes the filter box of communication with heat exchange pipe, the filter plate is fixed in the middle part in filter box, and the electric fan is installed between filter plate and heat exchange pipe in filter box, dust removal mechanism, dust removal mechanism includes the movable plate of sliding connection with filter box, and the side face of movable plate near filter plate regularly sticks to a plurality of brush hairs, and brush hair and filter plate contact each other. In the utility model, motor drive turntable drives movable plate reciprocating sliding through connecting rod, and brush hair automatically cleans the impurity on filter plate surface, avoids manual disassembly, realizes the automatic cleaning of filter plate, maintains the filtration efficiency, reduces the downtime maintenance time.

The application discloses a kind of multistage spiral pipe type heating phosphorus mud recovery phosphorus method, belong to phosphorus chemical technology field, the method is by PH adjustment pretreatment phosphorus mud slurry, again through seven-stage spiral pipe type gradient heating (temperature range 50~650 DEG C), accurate matching water, phosphorus, iodine, arsenic phase change characteristics, realize each element subsection separation;While constructing tail gas combustion heating, gas phase material reverse preheating, condensed water recycling energy and resource closed loop system.The application phosphorus recovery rate is greater than or equal to 99%, iodine, arsenic recovery rate is greater than or equal to 85%, energy consumption is reduced by more than 30%, no process wastewater and solid waste discharge, phosphorus mud residue can be used as building material raw material, suitable for full-component resource recovery of phosphorus mud in electrothermal method yellow phosphorus production, meet green chemical requirements.

The invention discloses a system and a method for cleaning a chlorination kettle for phosphorus trichloride production, the system comprises a chlorination kettle, the chlorination kettle is provided with a chlorine feeding pipeline, a yellow phosphorus feeding pipeline and a discharging pipeline, and the discharging pipeline is connected with a feeding port of a primary filtering device through a first material pump; a liquid phase outlet of the first-stage filtering device is connected with a feeding hole of the second-stage filtering device, and a solid phase outlet of the first-stage filtering device is connected with a feeding hole of the third-stage filtering device; a liquid phase outlet of the second-stage filtering device is connected with an inlet of the first-stage buffer tank, and a solid phase outlet of the second-stage filtering device is connected with a feeding hole of the third-stage filtering device; a liquid phase outlet of the third-stage filtering device is connected with a feeding hole of the first-stage filtering device, and a solid phase outlet of the third-stage filtering device is connected with an inlet of the second-stage buffering tank; an outlet of the primary buffer tank is connected with a feeding hole of the phosphorus washing tower through a second material pump; and the discharge hole of the phosphorus washing tower is connected with the reflux inlet of the chlorination kettle through a reflux pipeline. The method avoids the risks of byproduct acid generation, hydrogen accumulation, yellow phosphorus spontaneous combustion and the like, is high in efficiency and is suitable for industrial continuous production.

The invention belongs to the technical field of concrete materials, and particularly relates to a method for preparing a millstone from a type II anhydrous gypsum base. The II-type anhydrous gypsum-based inorganic millstone concrete is prepared from the following raw materials: II-type anhydrous gypsum, building gypsum, yellow phosphorus slag, ash calcium, an additive, gravel, sand and water. The concrete raw materials comprise, by weight, 34 to 38 parts of II-type anhydrous gypsum, 1 to 3 parts of building gypsum, 1 to 3 parts of yellow phosphorus slag, 1 to 2 parts of ash calcium, 0.4 to 0.6 part of an additive, 25 to 30 parts of rubble with a particle size of 2 to 10 mm, 12 to 17 parts of rubble with a particle size of 10 to 16.5 mm, 12 to 13 parts of sand with a particle size of 20 to 50 meshes, 5 to 6 parts of quartz sand with a particle size of 60 to 90 meshes, and 12 to 13 parts of water. Through scientific and reasonable raw material ratio and rigorous and meticulous preparation process, many problems existing in preparation of the inorganic millstone from the II-type anhydrous gypsum in the prior art are successfully solved.

The application discloses a preparation method of yellow phosphorus, which comprises the following steps: fully utilizing phosphate ore and phosphate-containing waste ore powder to produce artificial phosphate ore pellets which can be directly used for yellow phosphorus production, and further utilizing the artificial phosphate ore pellets and a shaft furnace in the steel industry to produce high-quality yellow phosphorus products. On one hand, the utilization efficiency of phosphorus resources is improved, and the production pressure of yellow phosphorus is relieved. On the other hand, a new utilization way is provided for the shaft furnace in the steel industry, waste is turned into treasure, and the waste of resources and equipment is reduced.