137 results about "Aluminium chlorohydrate" patented technology

The invention provides an intelligent chemical adding control method and system, equipment and a storage medium, and belongs to the technical field of intelligent control, the method is applied to a water treatment system, and the method comprises the following steps: based on raw water data, obtaining a first chemical adding amount through a chemical adding amount prediction model; generating an initial dosing amount instruction based on the first dosing amount, and sending the initial dosing amount instruction to a polyaluminum chloride dosing device and a sodium hypochlorite dosing device; obtaining the raw water ion concentration, alumen ustum form data and a floating current value after chemical adding, calculating a first difference value between the raw water ion concentration and a target ion concentration, calculating a second difference value between the alumen ustum form data and target alumen ustum form data, and calculating a third difference value between the floating current value and a target floating current value; and determining a target correction coefficient based on the first difference value, the second difference value and the third difference value, and updating the first dosage based on the target correction coefficient to obtain a second dosage. According to the invention, the dosing precision and adaptability can be improved.

The invention provides a method for preparing a poly-aluminum and functional silicon material by activating coal gasification slag and waste hydrochloric acid through microwave synergistic mechanical force, and belongs to the technical field of industrial solid waste recycling. The method comprises the following steps that the coal gasification slag is sequentially subjected to microwave radiation treatment and ball milling, activated slag and waste hydrochloric acid are subjected to an acid leaching reaction, and aluminum-iron-containing leachate and silicon-rich slag are obtained; extracting the aluminum-iron-containing leaching solution to obtain an iron-rich organic phase and a purified aluminum chloride solution; performing thermal polymerization reaction on the purified aluminum chloride solution to obtain polyaluminum chloride; the method comprises the following steps: carrying out alkaline leaching reaction on silicon-rich slag and waste alkali liquor, adding a structure-directing agent into a sodium silicate solution, and sequentially carrying out aging, solution pH value adjustment and crystallization precipitation to obtain mesoporous silica. According to the method, the aluminum-silicon leaching rate is remarkably increased through microwave-mechanical force synergistic activation, synergistic and efficient treatment of the three kinds of waste including the coal gasification slag, the waste hydrochloric acid and the waste alkali liquid is achieved, the technological process is closed, the product additional value is high, and the environmental and economic benefits are remarkable.

The invention relates to the technical field of red tide disaster prevention and control, in particular to a method for improving red tide treatment efficiency of polyaluminum chloride modified clay. The specific method comprises the following steps: activating the polyaluminum chloride modified clay with acid, and then applying the activated polyaluminum chloride modified clay into a sea area to be treated, so that the red tide organisms in the sea area are removed. The method can synchronously improve the pH of the red tide water body and reduce aluminum compound residues, has high efficiency, low cost and ecological safety, and is suitable for large-scale application.

The invention aims to provide a method for preparing a carbon-zeolite composite material and co-producing a flocculating agent from coal gasification slag, and belongs to the technical field of solid waste resource utilization. An acid leaching-alkaline hydrothermal-polymerization process is adopted, and the flocculating agent is prepared by controlling the acid leaching temperature and the acid leaching concentration; acid leaching residues with different silica-alumina ratios and acid leaching solutions with different aluminum-iron concentrations are prepared; preparing the acid leaching residues with different silica-alumina ratios into a carbon-zeolite composite material containing zeolite with different silica-alumina ratios and an alkaline leaching solution under an alkaline hydrothermal condition; the acid leaching solution and the alkali leaching solution are mixed according to a specific proportion, and the polyaluminum ferric chloride flocculant is prepared through the steps of polymerization, curing, drying and the like. According to the process, the coal gasification slag is utilized to prepare the carbon-zeolite composite material with different hierarchical pore structures and the high-performance polyaluminum ferric chloride flocculant, the product performance is excellent, no secondary waste is discharged in the production process, and an innovative technical path is provided for resource high-value utilization of the coal gasification slag.

The application provides a photoresist waste liquid recycling device and process, by adding hydrochloric acid to the photoresist waste liquid in the acidification precipitation tank in the pretreatment module to adjust the pH value, the linear phenolic resin precipitation rate reaches more than 95%, and the linear phenolic resin can be used again to the production stage of the photoresist after centrifugal separation, a compound coagulant containing sulfide and polyaluminum chloride is added to the heavy metal capture tank in the pretreatment module, and the removal rate of heavy metal ions reaches 99.5%; then the photoresist fragments are separated by using an ultrafiltration device, and the diatomite modified by NaOH and polyetherimide is used for adsorption and decolorization, then two-stage vacuum distillation process is used to realize the recovery of high-purity solvents in the photoresist waste liquid, finally, the remaining residue is polymerized and cured by ultraviolet radiation, and the solid fuel with high heat value can also be prepared, so that the 'zero emission' and resource full recovery of the photoresist waste liquid are realized, and the treatment cost and environmental risk are significantly reduced.

The application discloses a preparation method of polyaluminum chloride, and is characterized by comprising the following steps: S1, adding aluminum ash and hydrochloric acid solution into an acidification reaction tank, heating and reacting, filtering after the reaction is completed, and passing the filtrate into a polymerization reaction kettle; S2, adding calcium carbonate into the polymerization reaction kettle in batches to carry out polymerization reaction, stopping the reaction after the calcium carbonate is completely dissolved and the PH of the solution is 3-5; S3, adding polyacrylamide and ferric chloride into the polymerization reaction kettle, and precipitating under 1-3 pa low pressure to obtain sludge and upper liquid, concentrating and crystallizing the upper liquid, crushing the crystal, and obtaining polyaluminum chloride. The application increases an automatic blocking mechanism below a crystallization and crushing tank, automatically blocks when the sub-packaging cylinder is filled with crystals, achieves the purpose of quantitative sub-packaging, and does not cause too much or too little crystals in the sub-packaging cylinder, and does not require staff to be always beside the machine.

The invention discloses a defluorination agent suitable for defluorination of electronic industrial wastewater as well as a preparation method and a defluorination method of the defluorination agent. The defluorination agent comprises 9-10 wt% of aluminum salt, 0.1-0.2 wt% of ferric salt, 0.6-1.1 wt% of an alkaline regulator and the balance of water, the aluminum salt is selected from one or more of polyaluminum chloride and aluminum sulfate, and the ferric salt is selected from one or more of ferric trichloride, ferric sulfate and polyferric sulfate. The fluorine removal agent provided by the invention can realize that the fluorine concentration of discharged water is lower than 1mg / L through one-stage / two-stage fluorine removal under a low-fluorine, medium-fluorine or high-fluorine water inlet condition, the optimal pH condition of reaction is reduced, the acid-base and agent use cost is saved, and meanwhile, the fluorine removal agent is simple in preparation method and can be applied to large-scale popularization and production.

The application provides an oil-containing wastewater treatment equipment and method based on low-temperature evaporation, and belongs to the technical field of wastewater treatment. The equipment comprises, which are arranged in series, a demulsifier reaction tank, a polyaluminum chloride reaction tank and a polyacrylamide reaction tank, and oil-containing wastewater flows through the three reaction tanks to realize continuous and staged flocculation; a filter pressing device is communicated with a discharge port of the polyacrylamide reaction tank, and is internally provided with an arc-shaped filter residue assembly, a rotary residue scraping assembly and a filter pressing cleaning assembly, and the three assemblies are cooperated to form integrated operations of filtering, salvaging, filter pressing and cleaning; and a low-temperature evaporation machine is connected to a liquid outlet end of the filter pressing device. The application realizes continuous demulsification and flocculation treatment through the multi-tank series connection, and batch waiting is not needed; the filter pressing device automatically cleans flocculation materials while filter pressing, so that blockage is avoided and manual cleaning is not needed during shutdown. The overall process is closely connected, and the degree of automation is high, so that the oil-containing wastewater treatment efficiency and continuous production capacity are significantly improved, and the water quality after treatment can reach the recycling standard.

The invention belongs to the field of preparation of water treatment chemicals, particularly relates to a method for preparing a high-performance polyaluminum chloride water purifying agent through waste acid-polymerization coupling, and aims at solving the problems that a product is unstable, the impurity content is high, and the waste residue amount is large. The method comprises the following steps: performing oxidation impurity removal pretreatment on industrial waste hydrochloric acid; synthesizing a polyaluminum chloride solution in a medium polymerization state aluminum form as a seed crystal by adopting an aluminum source raw material under the condition of controlling proper basicity; mixing the pretreated waste acid with medium-polymerization-state aluminum seed crystals, pumping the mixture into an inorganic ceramic membrane coupling reactor for polymerization reaction, and promoting the hydrolytic polymerization reaction balance of aluminum to move towards the direction of generating high-polymerization-degree aluminum seeds through the separation effect of a ceramic membrane; after the reaction is completed, the solution is purified and separated through a nanofiltration membrane system, the intercepted liquid is the high-performance polyaluminum chloride water purifying agent, and the permeated liquid is a salt solution containing sodium chloride and the like which can be recycled. The method fully utilizes industrial waste acid to prepare polyaluminum chloride, and has obvious environmental protection benefits and application values.

The invention relates to the technical field of sewage treatment, and particularly discloses a sewage treatment agent as well as a preparation method and application thereof. The sewage treatment agent comprises modified polyaluminum chloride, a low-temperature flocculant and a plurality of auxiliary components, the modified polyaluminum chloride is obtained by doping nano boron nitride and modifying with a low-temperature modifier, and the low-temperature flocculant is obtained by copolymerization of polyacrylamide and 2-acrylamide-2-methylpropanesulfonic acid; the preparation method mainly comprises the steps of raw material dissolution, mixing reaction, flocculation compounding and the like. The sewage treatment agent can be used for domestic sewage treatment in a low-temperature environment of 0-5 DEG C, has the advantages of excellent low-temperature resistance, high hydrolysis speed, high pollutant removal rate and good stability, and can effectively overcome the defect of poor low-temperature treatment effect of an existing agent.

The invention provides a composite dephosphorizing agent and a use method thereof, and belongs to the field of wastewater treatment. The invention provides a composite dephosphorizing agent which comprises the following components in percentage by mass: 10-75% of polyaluminum chloride, 15-89% of attapulgite and 1-10% of an attapulgite, graphene oxide and active metal ion composite material, the attapulgite, graphene oxide and active metal ion composite material is prepared from active metal ion modified attapulgite and graphene oxide loaded on the active metal ion modified attapulgite, active metal ions in the active metal ion modified attapulgite comprise iron ions or ferrous ions. According to the invention, the characteristics of the graphene material are ingeniously combined with the attapulgite material to increase the characteristics of the graphene, and meanwhile, the attapulgite is modified by active metal ions to further improve the ion exchange and ion chelation characteristics of the composite attapulgite, so that the attapulgite has the characteristic of removing phosphorus pollution.

This invention provides a method for the synergistic resource utilization of zinc-aluminum alloy welding slag and hot-dip galvanizing waste hydrochloric acid. The synergistic resource utilization method includes the following steps: (1) mixing zinc-aluminum alloy welding slag and hot-dip galvanizing waste hydrochloric acid, and performing dissolution and neutralization treatment to obtain a first treatment liquid; (2) extracting the first treatment liquid to obtain an extract and a raffinate; (3) back-extracting the extract to obtain a mixture of zinc chloride and ammonium chloride; and then performing evaporation and crystallization treatment to obtain zinc ammonium chloride; and finally, aging the raffinate to obtain polyaluminum ferric chloride. The synergistic resource utilization method of this invention is simple to operate, has low processing costs, and realizes the synergistic treatment of industrial waste zinc-aluminum alloy welding slag and hot-dip galvanizing waste hydrochloric acid, which has good economic and environmental benefits and is suitable for large-scale promotion and application.

The invention provides modified polyaluminum chloride with high phosphorus removal performance and a preparation method and application thereof, and belongs to the technical field of modified polyaluminum chloride. The preparation method comprises the following steps: firstly, reacting aluminum chloride, zirconium oxychloride and an alkaline regulator in a water phase to prepare an aluminum-zirconium complex mother solution, then adding a polyhexamethylene biguanide solution into the aluminum-zirconium complex mother solution, and realizing effective compounding of organic long-chain molecules and inorganic complexes under the actions of static electricity, coordination, hydrogen bonds and the like; finally, mannitol serving as a polyhydric alcohol stabilizer is introduced into the organic-inorganic composite system, and premature polymerization and precipitation of the product are inhibited by means of the chelation of mannitol on a metal center and the steric hindrance effect of mannitol on molecules; according to the invention, the complexation of zirconium ions and strong current neutralization of polyhexamethylene biguanide form synergy, the removal efficiency of phosphate is improved, the formed flocculating constituent is more compact and has high settling velocity, and the application range of the product under complex water quality conditions is widened.

The invention discloses a continuous preparation process of a polyaluminum chloride water purifying agent, and belongs to the technical field of preparation of water purifying agents. The continuous preparation process of the polyaluminum chloride water purifying agent comprises the following steps: step 1, grinding secondary aluminum ash in a mortar, and sieving to obtain pretreated secondary aluminum ash; 2, the pretreated secondary aluminum ash is washed, filtered and dried, and washed secondary aluminum ash is obtained; and 3, adding the modified catalyst into the washed secondary aluminum ash, adding distilled water, stirring, sealing a reaction kettle, heating, stirring and reacting in a nitrogen environment, filtering after the reaction is finished to obtain filtrate, transferring the filtrate into a reactor, adding a saturated sodium carbonate solution, and curing to obtain the polyaluminum chloride water purifying agent. The polyaluminum chloride water purifying agent prepared by the method has high purity and low impurity content.

The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle for producing and processing polyaluminum chloride. Comprising a reaction kettle body, a stirring module is arranged on the surface of the upper end of the reaction kettle body, a discharging pipe is fixedly communicated with the surface of the bottom end of the reaction kettle body, an adjusting mechanism is arranged on the arc surface of the reaction kettle body and comprises a feeding pipe and a material frame, and one end of the feeding pipe is fixedly communicated with the arc surface of the reaction kettle body; the surface of the material frame is fixedly connected with an acrylic plate, the surface of the bottom end of the material frame fixedly communicates with a butt joint pipe, the arc face of the butt joint pipe is connected with the inner wall of the feeding pipe in an inserted mode, the two sides of the arc face of the butt joint pipe are fixedly connected with fixing frames, the inner walls of the fixing frames are rotationally connected with rotating rods, and the arc face of the upper end of the feeding pipe is fixedly connected with a butt joint frame. The reaction kettle for producing and processing polyaluminum chloride has the advantages that auxiliary materials can be conveniently added into the reaction kettle, and the production efficiency and the quality of a final product can be effectively improved.

The invention discloses a composite flocculant based on nano calcium oxide and a preparation method thereof, and relates to the technical field of sewage treatment, the composite flocculant comprises the following raw materials by weight: 10-20 parts of modified nano calcium oxide, 40-50 parts of polyaluminum chloride, 25-35 parts of modified lignin, 150-160 parts of deionized water, and 20-30 parts of absolute ethyl alcohol. According to the composite flocculant, the modified nano calcium oxide, the modified lignin and other raw materials are used in a combined mode, the modified nano calcium oxide plays a role through slow release and can be magnetically adsorbed and recycled, secondary pollution is avoided, the composite flocculant is endowed with high environmental protection performance, the molecular weight, hydrophilicity and charge density of the modified lignin are improved, and the composite flocculant has the advantages of being environmentally friendly and free of pollution. The modified lignin and the modified nano calcium oxide can react and be cross-linked, and the composite flocculant is endowed with a relatively strong flocculation effect in cooperation with the use of the polyaluminum chloride, so that the purification of complex sewage is facilitated.

The utility model relates to the technical field of chemical production, in particular to a polyaluminum chloride spray drying tower which comprises a drying tower and a powder removing assembly, an electric heating wire is embedded in the drying tower, a servo motor is fixedly installed on the upper side of a top plate, and the output end of the servo motor rotationally penetrates through the lower side of the top plate. A top plate and a bottom plate are fixedly mounted at the upper and lower ends of the drying tower; the powder removing assembly comprises two symmetrically-arranged driving motors, a spiral scraping plate is installed on the inner wall of the drying tower in a sliding mode, two balancing weights are fixedly installed on the upper side of the spiral scraping plate, lifting lugs are fixedly installed on the upper sides of the balancing weights, and reels are fixedly installed at the output ends of the driving motors. According to the powder removing device, through the arranged powder removing assembly and the matched design of the driving motor, the reel, the steel wire rope and the spiral scraping plate, dry powder on the inner wall of the drying tower can be scraped off when the spiral scraping plate slides downwards on the inner wall of the drying tower, and polyaluminum chloride powder is prevented from remaining on the inner wall of the drying tower.

The utility model discloses a production system for producing polyaluminum chloride by utilizing aluminum ash, which comprises a first reaction unit, a second reaction unit and a second filter press, the first reaction unit comprises a first stirring tank and a first filter press, and the first stirring tank is used for stirring and reacting the aluminum ash subjected to denitrification and impurity removal, water and industrial hydrochloric acid; the second reaction unit comprises a second stirring tank, a first metering conveyor and a second metering conveyor, the second stirring tank is used for stirring the aluminum chloride filtrate output by the first filter press, and the first metering conveyor inputs an ammonia nitrogen degradation agent into the aluminum chloride filtrate of the second stirring tank; the second metering conveyor is used for adding calcium aluminate powder into the second stirring tank, so that the aluminum chloride filtrate and the calcium aluminate powder react to form polyaluminum chloride slurry. According to the production system for producing the polyaluminum chloride by utilizing the aluminum ash, the ammonia nitrogen content of the produced polyaluminum chloride can be reduced to reach the national standard, and the application of the aluminum ash in the industrial polyaluminum chloride water purifying agent industry is facilitated.

The invention relates to the technical field of wastewater treatment, in particular to a recyclable high-salt organic wastewater treatment and salt recovery process which comprises the following steps: adding polyaluminum chloride and attapulgite powder into high-salt organic wastewater with the volume of V, and stirring for 3-5 minutes; the treated high-salt organic wastewater enters a ceramic membrane filter for primary filtration, filtrate enters a filtrate collecting device, and the volume of the filtrate is 0.8 V; in the treatment process of the high-salt organic wastewater, organic matters and suspended impurities are coagulated and filtered, almost all salts are retained in filtrate, salt ions are directionally migrated and concentrated under the driving of an electric field in cooperation with electrodialysis concentration treatment, and the removal rate of the organic matters and the recovery rate of the salts are greatly improved.

The present application belongs to the field of building materials and solid waste resource utilization, and relates to a red mud-based cementing material and a preparation method based on efficient drying-component homogenization-activity promotion. A filter aid is added to the red mud for sedimentation, and then pressure filtration is performed to obtain a solid material with a moisture content of 14-16%, which is then dried to a moisture content of less than 4%, and finally ground to obtain the red mud-based cementing material. The filter aid comprises the following raw materials: 10-30 parts of polyaluminum chloride, 5-15 parts of polyaluminum sulfate, 1000-1200 parts of blast furnace slag or fly ash, 700-900 parts of steel slag, 400-600 parts of carbide slag or alkali slag, and 300-400 parts of desulfurization gypsum or phosphogypsum or fluorogypsum. The present application not only improves the dewatering efficiency of the red mud, but also simplifies the preparation process of the red mud-based cementing material by preparing the red mud-based cementing material in one step, and the prepared red mud-based cementing material has the advantages of high mechanical strength, high durability and erosion resistance.

This invention relates to the field of water treatment technology, specifically to a composite water treatment agent, its preparation method, and its application, comprising a slow-release disinfectant, aluminum chloride, ferric chloride, and polyacrylamide; the slow-release disinfectant comprises an adsorbent carrier and a disinfectant in a mass ratio of (7-9):1. Compared with existing technologies, the composite water treatment agent prepared by this invention does not contain phosphorus, significantly reducing the threat of eutrophication and greatly improving water quality. Iron ions can effectively remove aluminum ions from source water and residual free aluminum ions after aluminum salt coagulation. The slow-release disinfectant can gradually alter the morphology of algal cells, disrupting the stability of algal cell structure and thus killing algae. Compared with commonly used polyaluminum chloride, it reduces the amount of treatment agent added, thereby reducing the cost of wastewater treatment. The preparation method is simple and can be industrialized.

The utility model relates to a quick drying device for polyaluminum chloride production, which comprises a drying box, a layering plate is fixedly arranged in the drying box, a grading drying assembly is arranged in the drying box, and the grading drying assembly comprises a first drying cylinder, a second drying cylinder, a third drying cylinder, a first round ball, a second round ball, a rotating handle, an air outlet hole and a hot air dryer. Raw material slurry with different moisture contents can be placed in the three placing plates through the placing plates, the raw material slurry in the placing plates can be subjected to high-temperature drying through hot air along air outlet holes through a hot air dryer, waste heat enters a second drying cylinder through a first round ball, and the raw material primary slurry in the second drying cylinder is dried; and through a second round ball, waste heat in the second drying cylinder can enter a third drying cylinder, and the temperatures of three times of drying are sequentially reduced, so that graded drying treatment can be carried out on raw material slurry with different water contents, the drying efficiency is high, and drying is more thorough.

The invention discloses a preparation method of polyaluminum magnesium chloride, and belongs to the technical field of inorganic high-molecular polymer preparation. A preparation method of polyaluminum magnesium chloride comprises the following steps: S1, mixing aluminum-containing waste hydrochloric acid, aluminum-magnesium-containing waste residues and low-degree hydrochloric acid, and stirring until the aluminum-magnesium-containing waste residues react completely to obtain a first mixed solution; s2, adding calcium aluminate into the first mixed solution, and separating after complete reaction to obtain polyaluminum magnesium chloride. The polyaluminum magnesium chloride is synthesized from industrial waste aluminum-containing waste hydrochloric acid, aluminum-magnesium-containing waste residues and low-degree hydrochloric acid through a specific method, on one hand, the industrial waste can be effectively recycled, and resource waste is avoided; on one hand, compared with common polyaluminum magnesium chloride, the polyaluminum magnesium chloride synthesized by the method has better turbidity removal rate and decolorization effect on alkaline printing and dyeing wastewater, pollutants in the wastewater can be efficiently removed, and the treatment cost of the printing and dyeing wastewater is reduced.

The present application relates to the technical field of chemical wastewater treatment, and particularly relates to a heat treatment device and method for synthesizing polyaluminum chloride from aluminum chloride wastewater. The heat treatment device for synthesizing polyaluminum chloride from aluminum chloride wastewater comprises a main body, a reaction cavity in the main body, a feeding pipe and an exhaust pipe on the top of the reaction cavity, a four-axis stirring mechanism on the top of the main body, a stirring motor, a transmission assembly and four stirring paddle groups, the stirring motor being drivingly connected to the stirring paddle groups through the transmission assembly, the stirring motor enabling the adjacent stirring paddle groups to rotate in opposite directions, a heating ring set outside the main body, and a rotary heat exchange mechanism extending upward from the bottom of the main body and located in the center of the reaction cavity, the rotary heat exchange mechanism being embedded in the middle of the four-axis stirring mechanism. The heat treatment device can make the aluminum chloride wastewater reach a controllable dynamic curing effect in the process of being synthesized into polyaluminum chloride, thereby effectively improving the treatment effect and efficiency.

The application relates to the technical field of water treatment, and particularly discloses a high-efficiency landfill leachate treatment process. The high-efficiency landfill leachate treatment process comprises the following steps: pretreatment: adding a coagulant A into landfill leachate, then adding a coagulant B, carrying out sedimentation or subsidence treatment, and obtaining pretreated liquid; the coagulant A comprises polyferric sulfate; the coagulant B comprises polyaluminum chloride, cationic polyacrylamide, modified bentonite and activated carbon; A / O treatment: sequentially passing the pretreated liquid through an anoxic tank and an aerobic tank to obtain treatment liquid A; MBR treatment: carrying out MBR treatment on the treatment liquid A by using an MBR (membrane bioreactor), to obtain treatment liquid B; and DTRO treatment: carrying out DTRO treatment on the treatment liquid B, to obtain purified water. The treatment process is convenient, and the treatment effect on the landfill leachate is good.

The invention discloses a solid-phase separation process method and system in completion fluid and application. The method comprises the steps that the completion fluid to be separated is placed in an ultrasonic system to be subjected to ultrasonic destabilization treatment under the conditions that the ultrasonic power is 400-1200 W and the ultrasonic time is 4-8 min; transferring the completion fluid subjected to ultrasonic destabilization treatment into a flocculation-supergravity settling system, adding a composite flocculant into the flocculation-supergravity settling system to act for 2-5 minutes, and carrying out liquid-solid pre-separation on stable floccules; wherein the composite flocculant is a mixture of cationic polyacrylamide and polyaluminum ferric chloride; and the pre-separated well completion fluid is placed in a flotation system, a hydrophilic inhibitor is added into the flotation system to act for 3 min, and then a foam regulator is added into the flotation system to conduct flotation operation for 15 min. The insoluble solid content of the well completion fluid treated by the method can be reduced to be within 1%, the recycling requirement is well met, the recycling rate is higher than 85%, and well completion operation is propelled to a new green, environment-friendly and low-carbon stage.

The invention discloses a polyaluminum ferric chloride flocculant as well as a preparation method and application thereof, and belongs to the technical field of sewage treatment.The preparation method comprises the steps that cobalt ferrite is loaded on the surface of nano mesoporous silica through a coprecipitation-calcination method, supported silica is obtained, then amination modification and tartaric acid modification are performed by using a silane coupling agent KH550, and the polyaluminum ferric chloride flocculant is obtained. And finally, blending the composite silicon dioxide with an aluminum salt, an iron salt and hydrogen peroxide under an acidic condition, and forming and loading a polyaluminum ferric chloride flocculation layer on the surface through in-situ hydrolytic polymerization and catalytic oxidation synergy to obtain the polyaluminum ferric chloride flocculant. Quadruple synergy of magnetic separation, catalytic oxidation, deep adsorption and enhanced flocculation is realized, and suspended matters, soluble organic matters, phosphorus and chromaticity are efficiently removed.

The utility model discloses a polyaluminum chloride raceway pond multi-stage shunting reaction device which comprises a raceway pond body, a baffle is arranged in the raceway pond body, a driving paddle is connected between the raceway pond body and the baffle through a rotating shaft, a driving motor is installed at the end of the rotating shaft, and the driving motor is connected with the baffle. The runway pond comprises a runway pond body, a multi-stage splitter plate is arranged in the runway pond body, a side plate is mounted on the side surface of the multi-stage splitter plate, a stirring paddle is mounted on the lower surface of the side plate in a penetrating manner, and a first turbine is mounted on the surface of the stirring paddle. The driving paddle arranged in the runway pond can enable a polyaluminum chloride solution in the runway pond body to integrally flow under the driving of the driving motor, and the stirring paddles on the multi-stage splitter plate can locally stir the solution in each stage of splitting area under the action of the stirring motor, so that the solution in each stage of splitting area can be partially stirred in a manner of combining the integral flowing and the local stirring, and the solution in each stage of splitting area can be completely stirred. All components in the solution can be fully mixed, and the reaction efficiency and uniformity are improved.

This utility model relates to the field of solid-liquid separation technology, specifically to a solid-liquid separation device for the production of polyaluminum chloride. It includes a separation tank and a separation mechanism for solid-liquid separation of a solution. The separation mechanism is located inside the separation tank and includes a bottom filter plate fixedly installed inside the tank. An inner cylinder is provided at the upper end of the bottom filter plate, and an anti-clogging structure is provided on the side wall of the inner cylinder for unblocking clogged upper filter holes. Beneficial effects: The separation mechanism performs solid-liquid separation on the mixture. The anti-clogging structure drives the inner cylinder to rotate. The centrifugal force generated by the rotation of the inner cylinder throws impurities attached to the side wall outwards onto the bottom filter plate. The more severe the blockage of the inner cylinder by impurities, the greater the centrifugal force generated by the inner cylinder, making it easier for the mixture to pass through the inner cylinder and achieve solid-liquid separation. This improves the anti-clogging effect of the inner cylinder, enhances the quality of solid-liquid separation, and increases the efficiency of solid-liquid separation.

The invention discloses a semiconductor wastewater defluorination agent and a preparation method and application thereof, and belongs to the technical field of semiconductor fluorine-containing wastewater, the semiconductor wastewater defluorination agent comprises the following preparation raw materials by mass: 10-30% of modified zirconium-based composite powder, 25-50% of calcium magnesium salt, 5-25% of polyaluminum chloride, 2-8% of a composite synergist, 0.05-1% of a flocculant and the balance of water. The preparation method comprises the following steps: S1, pre-preparing raw materials; s2, preparation of a premixed solution: sequentially adding polyaluminum chloride and a composite synergist into water, and mixing to obtain the premixed solution; s3, preparation of a product: adding the modified zirconium-based composite powder and calcium magnesium salt into the premixed liquid, dispersing, and finally adding a flocculating agent, so as to obtain the semiconductor wastewater defluorination agent. According to the method, a precipitation-adsorption-flocculation synergistic system is constructed, deep fluorine removal of the semiconductor fluorine-containing wastewater is achieved, and the method has the advantages of being high in anti-interference capacity, low in treatment cost and high in operation flexibility, can adapt to fluorine-containing wastewater of different concentrations and stably reaches the standard.