741 results about "Polyaluminum chloride" patented technology

The invention discloses a deep defluorination sludge backflow method and a defluorination agent preparation method, and particularly relates to the technical field of sewage treatment.The deep defluorination sludge backflow method comprises the following steps that fluorine-containing waste water is introduced into a mixing cavity through flow regulation for a continuous flow defluorination reaction, polyaluminum chloride, anhydrous calcium chloride and sodium chloride serve as the defluorination agents, the water inflow amount is added, and the defluorination reaction is completed; and reducing the pH value in the wastewater to a set threshold value. The sludge reflux rate is predicted through the effluent fluorine concentration and the sludge concentration, when the effluent fluorine concentration exceeds the set threshold value, the reflux rate is increased to ensure the fluorine ion removal efficiency, and when the sludge concentration exceeds the set threshold value, the reflux amount is reduced, and the situation that excessive sludge in the reaction tank affects the action of a medicament is avoided; the method has the advantages that the fluorine ions in the wastewater can be effectively removed and the wastewater can reach the emission standard by accurately calculating the chemical dosage, dynamically feeding back and adjusting and controlling the sludge backflow rate through real-time monitoring data and dynamically adjusting a regression model.

The present invention belongs to the field of resource utilization of building materials and solid waste, and relates to a red-mud-based cementing material based on efficient drying, component homogenization and activity improvement, and a preparation method therefor. The preparation method comprises: adding a filter aid to red mud to carry out sedimentation, then subjecting same to filter pressing until the water content is 14-16%, then drying the solid material, which has been subjected to filter pressing, until the water content is 4% or below, and finally grinding same to obtain the product. 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 alkaline residues, and 300-400 parts of desulfurized gypsum or phosphogypsum or fluorgypsum. By means of the present invention, the dehydration efficiency of red mud can be improved, the red-mud-based cementing material can also be prepared in one step; the preparation process for the red-mud-based cementing material is simplified; and the prepared red-mud-based cementing material has the advantages of a high mechanical strength, high durability and erosion resistance.

The invention relates to the technical field of water treatment, and discloses a modified polyaluminum chloride flocculant and a preparation method thereof.The modified polyaluminum chloride flocculant is prepared from, by weight, 50-65 parts of polyaluminum chloride, 8-12 parts of magnesium silicate, 5-8 parts of carboxymethyl chitosan, 15-25 parts of polyaluminum ferric chloride and 3-5 parts of tea polyphenol; the molar ratio of aluminum ions to iron ions in the modified polyaluminum chloride flocculant is (3-4.5): 1. According to the invention, an inorganic-organic dual-modifier synergistic effect mechanism is adopted to construct a'rigid framework-flexible network 'composite structure, and the structure can significantly improve the adsorption capacity of Pb < 2 + >. Meanwhile, the mechanical property of the flocculating agent is improved, so that the flocculating agent can be applied to a high-turbulence environment.

The invention provides a precipitation device for polyaluminum chloride production, and relates to the technical field of sewage treatment.The precipitation device comprises a concentration box, three mixing boxes are arranged at the top of the concentration box, water inlet pipes are arranged at the tops of the mixing boxes, the lower ends of the water inlet pipes are closed, and connecting assemblies are arranged between the water inlet pipes and the mixing boxes and comprise top plates; compared with the prior art, the device has the advantages that the water inlet pipe is connected with the three mixing boxes, and wastewater fed by the water inlet pipe is fed into the different mixing boxes in batches to be mixed with a quantitative coagulant through cooperation of the connecting assembly and the driving assembly; feeding of the next group of mixing boxes can be performed while reaction time is given, the total waiting time is shortened, the screening assembly and the driving assembly are matched to facilitate separation of wastewater and precipitates, the blockage problem is avoided, the precipitates are convenient to clean, and the wastewater treatment efficiency is improved.

The invention relates to a recyclable composite water purifying agent and a preparation method thereof, and belongs to the technical field of high polymer materials. The recyclable composite water purifying agent comprises the following components in parts by weight: 12-18 parts of activated carbon, 20-25 parts of diatomite, 15-25 parts of polyaluminum chloride, 6-12 parts of a modified flocculant, 5-10 parts of polyethylene glycol, 1-3 parts of a modified photocatalyst and 250-370 parts of deionized water, the recyclable composite water purifying agent prepared by the invention not only has a good pollutant adsorption effect, but also has an excellent antibacterial effect.

The invention relates to the technical field of aluminum electrolyte recovery, in particular to a waste aluminum electrolyte resource utilization method. The waste aluminum electrolyte resource utilization method comprises the following steps that waste aluminum electrolyte and a reactant are subjected to a reaction in a closed container, a product obtained after the reaction is completed is washed in water, then first solid-liquid separation is carried out to obtain a solid, aluminum fluoride is obtained after drying, and aluminum fluoride is obtained after second solid-liquid separation is carried out. The reactant is selected from one or two of anhydrous aluminum chloride and polyaluminum chloride, and the reaction temperature is not lower than 200 DEG C. By utilizing the physical characteristic that the melting point of the reactant is higher than the boiling point, the reactant forms a solid phase-liquid phase-gas phase three-phase coexistence system in a closed space at the temperature higher than the melting point and the boiling point, so that the reactant can more efficiently perform molecular collision and mutual diffusion at an interface, thereby accelerating the reaction rate and improving the conversion rate.

The invention is applicable to the technical field of perfluorinated compound removal, and provides an adsorption-coagulant for removing perfluorinated compounds in water and application thereof, the adsorption-coagulant comprises an adsorbent and a coagulant, the adsorbent adopts activated carbon powder, and the coagulant adopts polyaluminum chloride. The adsorbent adopted by the invention can efficiently capture trace perfluoroalkyl molecules in water, and the coagulant can promote the molecules to form larger aggregates in water, so that the overall removal efficiency is improved. By reasonably designing the adsorption-coagulation process, the use amount of a traditional coagulant can be reduced, the generation of byproducts in the treatment process is reduced, and the subsequent treatment cost is reduced, so that the economical efficiency and sustainability of the whole treatment process are improved. The adsorption-coagulation technology disclosed by the invention combines two water treatment methods of adsorption and coagulation, the removal efficiency of nondegradable pollutants such as perfluorinated compounds is remarkably improved through the combined action of the two methods, and the adsorption-coagulation technology shows wide applicability.

The invention relates to the technical field of water treatment, and particularly provides a polyaluminum chloride composite water treatment agent and a preparation method thereof, and the polyaluminum chloride composite water treatment agent comprises the following components in percentage by weight: 80-90% of polyaluminum chloride; 0.5%-2% of modified chitosan; 3%-8% of sodium lignosulphonate-Fe < 3 + > complex; 0.1%-0.5% of a pH regulator; wherein the modified chitosan is citric acid cross-linked chitosan, the deacetylation degree of the modified chitosan is not lower than 85%, and in the sodium lignosulphonate-Fe < 3 + > complex, the molar ratio of Fe < 3 + > to sodium lignosulphonate is 1: 3. Through the synergistic interaction of polyaluminum chloride and a natural polymer composite system, the design of an efficient, green and multifunctional water treatment agent is realized.

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 water treatment composition with defluorination and flocculation functions, and belongs to the technical field of sewage treatment. According to the technical scheme, aluminum polychlorid is taken as a core component, and a composition formula for improving the defluorination and flocculation effects is constructed around the aluminum polychlorid. Specifically, a small amount of polysilicate aluminum ferric is added to cooperate with polyaluminum chloride, and sodium methyl silicate and sodium pyrophosphate are added, so that the dispersity of the composition in sewage is improved; on the basis, chitosan and sodium vinylsulfonate are added, so that certain adsorption and flocculation effects are achieved. Meanwhile, sodium hyaluronate is used as a thickening agent to enhance the substance exchange between the water treatment composition and a solute, and the attapulgite and the shell powder are used to increase the contact area, so that the complexing action and the ion exchange action of the polyaluminum chloride on fluorine ions are remarkably improved. Compared with a single component of polyaluminum chloride, the invention not only improves the removal efficiency of fluorine ions, but also improves the flocculation effect, and has the technical advantages of quick response, good treatment effect and the like.

The invention relates to the technical field of water treatment, and discloses a sewage mixing flocculation sedimentation tank with a dosing system and a sewage treatment process, the sewage treatment process comprises the following steps: (1) sewage enters a pretreatment unit, and large-particle suspended solids are removed; (2) enabling the sewage to flow into a pH regulating tank, adding a pH regulator through a dosing system, and regulating the pH value to 9-11; (3) passing through a coagulation reaction tank, adding ferrous sulfate to reduce hexavalent chromium into trivalent chromium, and promoting a flocculation reaction; and (4) further adding polyaluminum chloride through the flocculation reaction tank to form floc. Through a multi-unit combined treatment process, suspended solids and various heavy metals in the sewage are gradually removed, and the effluent quality is ensured to reach the standard. Compact and reasonable process layout is adopted, the occupied area is reduced, and the device is suitable for small and medium-sized sewage treatment plants. An automatic dosing control system is introduced, dosing is accurate, and the operation cost is reduced.

The invention discloses a photovoltaic wastewater lime-process crystallization treatment process and a treatment system used by the same, which are characterized in that acid fluoride wastewater and alkali washing wastewater generated in a photovoltaic sheet production process are respectively collected by an acid fluoride wastewater collecting pool and an alkali washing wastewater collecting pool; the acid fluoride wastewater and a lime agent are subjected to a crystallization reaction in a crystallization fluidized bed to obtain calcium fluoride crystals, effluent of the crystallization fluidized bed and alkali washing wastewater are mixed in a secondary defluorination unit, and calcium chloride is added for a defluorination reaction after the pH value is adjusted; the effluent of the second-stage fluorine removal unit reacts with a fluorine removal agent or polyaluminum chloride in the third-stage fluorine removal unit to remove fluorine again, polyacrylamide is added into the third-stage fluorine removal unit to perform a flocculation reaction, and finally, the fluorine ion concentration in the effluent of the third-stage fluorine removal unit meets the discharge requirement. The agent input cost and the sludge treatment cost are reduced, the secondary pollution of chloride ions is avoided, and the effluent is ensured to stably reach the standard.

The invention discloses a polyaluminium chloride sewage treatment device based on urban water purification, and relates to the technical field of sewage treatment. The invention provides a polyaluminium chloride sewage treatment device based on urban water purification, which can treat sewage in sections and prolong the mixing reaction time of sewage and polyaluminium chloride. A polyaluminium chloride sewage treatment device based on urban water purification includes a tank body, the tank body is connected with an inlet pipe, the other side of the tank body away from the inlet pipe is connected with an outlet pipe, the tank body is fixedly connected with a loading box, the loading box is fixedly connected with a booster pump, the booster pump is connected with the loading box through a pipeline, the booster pump is connected with a delivery pipe, and the left side of the tank body is fixedly connected with the loading box. The three cavities formed by the treatment cylinder and the partition plate continuously contain sewage for section-by-section treatment, and the partition plate directly puts polyaluminium chloride into the sewage for coagulation, so as to prolong the coagulation reaction time of the sewage in the treatment cylinder, thereby improving the effect of sewage purification.

The invention belongs to the technical field of synthetic purifying agents, and discloses a multipurpose synthetic purifying agent and a use method thereof, and the purifying agent comprises the following components in percentage by weight: 18-50% of ferric trichloride; 2-37% of polyaluminum ferric chloride; 10 to 60 percent of calcium chloride dihydrate; 22 to 52 percent of ferrous sulfate; 5-45% of polyaluminum chloride; 10-30% of basic aluminum chloride; according to the invention, COD in wastewater can be rapidly removed, the pH value is neutralized, the hydrophilicity is changed, a diffusion layer is compressed, the counter-ion effect is increased, and the purpose of oxidation reduction is finally achieved; in the hydrolysis process, a surfactant and various pollution factors in wastewater can be effectively adsorbed and polymerized into jelly, and the jelly is rapidly precipitated and separated in a short time, so that the wastewater is purified.

The invention provides a fluorine removal agent composition and a preparation method thereof, and belongs to the technical field of fluorine removal agents. The invention aims to improve the fluorine removal efficiency of the polyaluminum chloride, and designs a compound formula with a synergistic effect for the polyaluminum chloride. According to the composition, aluminum polychlorid is used as a main component, bentonite is adopted for achieving the dispersing and thickening effects, the composition is in a suspension and gel state in water, and contact between fluorine ions and a fluorine removal agent is promoted; meanwhile, diatomite is adopted as an adsorbent, so that the removal effect of fluorine ions is improved. As a surfactant, sodium citrate can form an emulsion in water to remove part of pollutants and relieve the influence of the pollutants on the fluorine removal process. In addition, diethylenetriamine pentaacetate, polydimethylsiloxane, lanthanum nitrate and other components are added and cooperate with polyaluminum chloride, and the fluorine removal effect is fully improved. In the aspect of the preparation method, a compounding scheme is designed according to physical characteristics of different components, and the method has low requirements on equipment and has high process efficiency.

The invention belongs to the technical field of metal recovery, and discloses a method for recovering indium from indium-containing acidic waste liquid, which comprises the following steps: adding an alkaline solution into the indium-containing acidic waste liquid until the pH value is 8-14 to obtain an intermediate liquid I, adding a flocculating agent into the intermediate liquid I, and carrying out filter pressing to obtain filter residues; the flocculating agent is selected from at least one of polyacrylamide, polyaluminum chloride, polyferric sulfate, polyferrous sulfate and polyaluminum sulfate, the reducing agent is selected from at least one of graphite powder, coke and anthracite, the flocculating agent is selected from at least one of sodium hydroxide, sodium hydroxide and sodium hydroxide, and the reducing agent is selected from at least one of sodium hydroxide, sodium hydroxide and sodium hydroxide. According to the method, indium in the indium-containing acidic waste liquid is preliminarily settled by adjusting the pH value, and then part of residual metal indium with positive charges is further settled and gathered by using the flocculating agent, so that the recovery rate of indium is increased.

The invention relates to the technical field of water treatment, and discloses an aluminum-based composite silicon removal agent and application thereof. The aluminum-based composite silicon removal agent comprises a component A and a component B, the component A is sodium metaaluminate; the component B comprises one or more of crystalline aluminum chloride, polyaluminum chloride and polyaluminum sulfate. The two components in the aluminum-based composite silicon removal agent can form multi-stage aluminum form distribution of'multi-core-mononuclear-colloid 'in wastewater, so that a complete silicon removal path of'pH regulation and control, charge neutralization, adsorption complexing, bridging flocculation and chemical precipitation' is constructed, and efficient removal of silicate radicals can be realized. The composite silicon removal agent does not need to accurately adjust the pH value of the system, the requirement for operation precision is low, operation is easy, and the dosage of the agent is small.

The present invention discloses a low-temperature resistant and early-strength type alkali-free liquid accelerating agent and its preparation method, belonging to the technical field of alkali-free liquid accelerating agents. The composition includes 12-15 parts of aluminum sulfate, 2-5 parts of sodium thiocyanate embedded by β-cyclodextrin, 5-8 parts of calcium hydroxide deactivator, 3-5 parts of fiber, 5-10 parts of hydrophilic polymer substance, 3-5 parts of cationic surfactant, 6-10 parts of polyaluminum chloride, and 2-3 parts of air-entraining agent. The low-temperature resistant and early-strength type alkali-free liquid accelerating agent of the present invention can improve the frost resistance of sulfate alkali-free accelerating agents, reduce the viscosity of cement slurry, promote the hydration reaction of C3S, shorten the setting time of concrete, and improve the later strength of concrete.

The invention belongs to the technical field of building materials, and particularly relates to magnesium oxychloride cement mortar containing polyaluminum chloride water purifier waste residues as well as a preparation method and application of the magnesium oxychloride cement mortar. The magnesium oxychloride cement mortar containing the polyaluminum chloride water purifying agent waste residues is prepared from the following components in parts by mass: 45 to 55 parts of magnesium oxychloride cement and gypsum, 100 to 150 parts of the polyaluminum chloride water purifying agent waste residues, 0 to 3.6 parts of citric acid, 0 to 14 parts of styrene-acrylic emulsion, 130 to 170 parts of river sand and 160 to 200 parts of water, the magnesium oxychloride cement is prepared from 480 to 520 parts of magnesium oxide and 190 to 320 parts of magnesium chloride hexahydrate. The magnesium oxychloride cement mortar containing the polyaluminum chloride water purifying agent waste residues can be used as a cement-based pavement patching material, a large amount of polyaluminum chloride water purifying agent waste residues can be consumed, the problem of environmental pollution caused by the waste residues is effectively solved, the water resistance of the magnesium oxychloride cement mortar can be effectively improved, and efficient resource utilization of industrial solid waste is achieved.

The invention relates to the field of water purifying agents, and discloses a polyaluminum chloride water purifying agent for printing and dyeing wastewater and a preparation method thereof.The polyaluminum chloride water purifying agent for printing and dyeing wastewater is prepared from polyaluminum chloride, an adsorption additive, magnetic composite filler and the balance deionized water; the adsorption additive is prepared by ultrasonically compounding a modified ZIF-8 coated iron material and modified nano titanium dioxide; the modified ZIF-8 coated iron material is prepared by coating nano zero-valent iron with ZIF-8 and carrying out high-temperature carbonization. The modified nano titanium dioxide is prepared by doping and modifying cerium; the magnetic composite filler is prepared by the following steps: pretreating sepiolite by using hydrochloric acid, then coating the surface of the pretreated sepiolite with chitosan by adopting a coprecipitation method, and loading ferroferric oxide particles into the chitosan. Therefore, the usage amount of polyaluminum chloride is reduced, and the water purifying agent is endowed with excellent photocatalytic activity and adsorption effect in printing and dyeing wastewater.

The invention belongs to the field of sewage treatment, and discloses a two-phase mud film efficient synchronous nitrogen and phosphorus removal process. By integrating biological denitrification and chemical phosphorus removal technologies and adopting a two-phase treatment unit, efficient and synchronous removal of nitrogen and phosphorus in sewage is realized. According to the process, a biological treatment procedure of denitrifying bacteria and nitrifying bacteria under an anaerobic and aerobic alternating condition is utilized, and ammonia nitrogen and nitrate nitrogen in sewage are effectively removed by controlling reaction conditions and formation of a mud film. Meanwhile, ferric salt and polyaluminum chloride flocculants are used for chemical precipitation, phosphate ions form insoluble precipitates by adjusting the pH value and the adding amount, and activated carbon or a zeolite adsorption material is combined for adsorption, so that phosphorus is further removed. The method has the advantages of high treatment efficiency, low operation cost, simplicity and convenience in operation and wide applicability, and an efficient, economic and environment-friendly solution is provided for sewage treatment.

The invention discloses a preparation method of high-basicity polyaluminum chloride, which comprises the following steps: by taking hydrochloric acid with the mass fraction of 30% and aluminum hydroxide as raw materials, adding solid polyaluminum chloride into a chitosan-blended kaolin solution which is 2-5 times of the total amount of the solid polyaluminum chloride, then adding a hydroxyapatite agent which is 10-15% of the total amount of the solid polyaluminum chloride, and fully stirring to obtain the high-basicity polyaluminum chloride. And carrying out suction filtration and drying to obtain the high-basicity polyaluminum chloride. According to the high-basicity polyaluminum chloride disclosed by the invention, hydrochloric acid and aluminum hydroxide are adopted as raw materials and are matched with calcium carbonate powder and calcium aluminate powder to prepare solid polyaluminum chloride, and then chitosan is blended with kaolin liquid and a hydroxyapatite agent for coordination and synergism, so that the high-basicity polyaluminum chloride is prepared through the coordination and synergism of the raw materials; the C0D, turbidity and heavy metal removal rate of the obtained high-basicity polyaluminum chloride product are improved in a balanced manner, and meanwhile, the durability and stability effects of the product are remarkable.

The invention discloses a raw material conveying device for polyaluminum chloride production and a working method. The raw material conveying device comprises a conveying pipe, a damping base, a storage tank, a fluidization anti-blocking module, a dust pumping system and a control unit. The upper portion of the conveying pipe is connected with hose discharging openings of a plurality of sets of storage tanks corresponding to the powder screening devices through star-shaped discharging valves. The bottom of the storage tank is mounted on a damping base, and a vibrator is fixedly mounted on the lower side of the storage tank; the storage tank is internally provided with a fluidization anti-blocking module which can fluidize materials through airflow so as to prevent blocking and caking; the dust suction system comprises a dust suction hood arranged at the top of a feeding pipe on the upper side of the storage tank, and the dust suction hood is connected with a cyclone separator capable of collecting dust generated in the feeding process and an induced draft fan through pipelines. The raw material conveying device for polyaluminum chloride production has the functions of effectively solving the problems of caking, blockage and dust caused by moisture absorption of materials and automatically adjusting conveying parameters according to material characteristics.

The invention discloses a process for producing polyaluminum chloride by recycling aluminum ash. The process comprises a primary aluminum ash pretreatment process, a secondary aluminum ash deamination process, an ammonium chloride crystallization process, a liquid polyaluminum chloride process and a solid polyaluminum chloride process, the primary aluminum ash pretreatment procedure comprises a first cyclone separator, a ball mill, a screening machine and a bag-type dust collector, the input end of the first cyclone separator is connected with a primary aluminum ash bin through conveying equipment, the coarse ash end of the first cyclone separator is connected with a feeding port of the ball mill, and a discharging port of the ball mill is connected with a feeding port of the screening machine; fine powder screened by the screening machine and secondary aluminum ash fine powder discharged by the first cyclone separator are collected into a secondary aluminum ash bin, and dust outlets of the first cyclone separator, the ball mill and the screening machine are connected with a dust inlet of the bag-type dust collector through pipelines. By arranging a series of structures, the produced polyaluminum chloride is high in purity, the economic benefit of the process is improved, tail gas is washed, and the pollution is reduced.

The invention relates to the technical field of demulsifiers, and particularly discloses a demulsifier for treating waste emulsion and a demulsification process of the demulsifier. The invention discloses a demulsifying agent for treating waste emulsion. The demulsifying agent is prepared from the following raw material components in parts by weight: 1 to 1.2 parts of calcium chloride, 1 to 1.1 parts of polyaluminum chloride, 0.7 to 0.85 part of anionic polyacrylamide, 0.3 to 0.5 part of ferrous sulfate, 1 to 1.2 parts of a surfactant, 0.4 to 0.5 part of an auxiliary demulsifying agent, 0.1 to 0.2 part of a synergist and 0.1 to 0.2 part of a stabilizer. The demulsifier disclosed by the invention has a relatively good demulsification effect, so that the treatment effect on the waste emulsion is improved.

The invention provides a poly-like flocculation flotation method for micro-fine particle galena and micro-fine particle sphalerite. The method comprises the following steps: firstly, mixing to-be-treated ore samples containing micro-fine particle galena and micro-fine particle sphalerite with the particle sizes of less than or equal to 20 microns with water to obtain to-be-treated ore pulp, then sequentially adding zinc sulfate, diethyldithiocarbamate, polyoxyethylene, polyaluminum chloride and a foaming agent, and carrying out air inflation flotation and foam scraping to obtain galena concentrate and tailings. ZnSO4 is adsorbed on the surface of the micro-fine-particle sphalerite in advance and generates a synergistic effect with polyaluminum chloride added subsequently, and N, N '-diethyldithiocarbamate is adsorbed on the surface of the micro-fine-particle galena in advance and generates a synergistic effect with polyoxyethylene added subsequently, so that galena hydrophobic floccules and sphalerite hydrophilic floccules with proper apparent particle sizes are formed; on one hand, the flotation recovery rate of the micro-fine particle galena can be increased, and on the other hand, mechanical entrainment of the micro-fine particle sphalerite can be reduced, so that the flotation separation efficiency of the micro-fine particle lead zinc ore can be effectively improved.

The invention discloses a production process of an efficient polyaluminum chloride-based composite flocculant, which includes adding tourmaline into ethanol for low-temperature ball milling treatment to obtain tourmaline fine powder; performing low-temperature grinding treatment on vermiculite, then successively adding tourmaline, aluminum isopropoxide and trichloromethylsilane and stirring, and obtaining a prefabricated vermiculite carrier after dispersion and granulation; standing the prefabricated vermiculite carrier for 1-2 h, then standing at a constant temperature for 3-5 h, then soaking it in an alkali solution for 20-30 min, performing ultrasonic treatment for 5-10 min, filtering and sintering to obtain porous mixed vermiculite; mixing dimethyldiallylammonium chloride and polyaluminum chloride evenly, then putting them into the porous mixed vermiculite and stirring evenly, then performing microwave oscillation treatment for 1-2 h, taking out the porous mixed vermiculite particles, which are the prefabricated flocculant; standing the prefabricated flocculant for 1-2 h, and obtaining an efficient flocculant after freeze-drying. The invention utilizes vermiculite to improve the sedimentation characteristics of the flocculant, combines with the negative ion adsorption of tourmaline, aggregates the flocs of dimethyldiallylammonium chloride and polyaluminum chloride, reduces the dispersion problem of the flocs, and achieves the balance of adsorption, sedimentation and flocculation.

The invention relates to the technical field of sewage treatment, and discloses an energy-saving and environment-friendly treatment method for sewage generated by a spinning electrostatic deoiling device. The method comprises the following steps: performing oil separation pretreatment on the oily agent wastewater, and treating in a pH adjusting tank in two stages: in the first stage, adjusting the pH value to 9-10, and adding polyaluminum chloride while quickly stirring; and in the second stage, the pH is further adjusted to 11-12, polyacrylamide is added with slow stirring, and finally, standing, precipitation and separation are performed. According to the method, the pollutant removal efficiency is remarkably improved and the COD (Chemical Oxygen Demand) removal rate is high by accurately regulating and controlling the pH value, adding the flocculating agent in batches and controlling the stirring speed. Meanwhile, compared with a traditional process, consumption of a large amount of acid and alkali is avoided, generation of hazardous waste such as sludge is reduced, the dosage of a flocculating agent and the treatment cost are reduced, and the efficient, economical and environment-friendly sewage treatment target is achieved.

The invention relates to the technical field of wastewater treatment, in particular to a fluorine removal agent for deep fluorine removal and a preparation method thereof, and the fluorine removal agent for deep fluorine removal comprises the following raw materials by weight: 2-5 parts of chitosan; 65-90 parts of polyaluminum chloride; 5-15 parts of magnesium oxide; 1-5 parts of titanium dioxide; 1-5 parts of manganese oxide; and 1-5 parts of lanthanum oxide. The fluorine removal agent has the beneficial effects that the obtained fluorine removal agent gets rid of the constraint of traditional calcium salt, a key catalyst (such as titanium dioxide, manganese dioxide and other transition metal oxides) is introduced through comparison and selection on the basis of controlling the compatibility material combination and synthesis reaction process, the catalyst has a catalysis function on a complex reaction, the adsorption capacity of the fluorine removal agent can be improved, and the fluorine removal effect is improved. And a micro-flocculation core growth position is provided to generate an adsorption and clamping effect. The fluorine ion content of the pretreated fluorine-containing wastewater (the fluorine ion content is 20 mg / L or below) can be reduced to 2 mg / L or below, and the fluorine ion removal rate reaches 90% or above.

The invention discloses a dehydration, crushing and curing integrated treatment method for sand washing mud. Comprising the following steps: mixing a conditioner with sand washing mud, dehydrating and crushing, mixing and stirring with a curing material, extruding, vibrating and molding, and curing to obtain the sand washing mud-based cured body. According to the invention, polyacrylamide, polyaluminum chloride and fly ash / coal gasification slag are used as conditioners, colloidal particles are flocculated and precipitated under the effects of electrical neutralization, adsorption bridging and net capturing of the conditioners, and fly ash / coal gasification slag plays a role in a skeleton, so that a drainage channel can be provided inside the sand washing mud, the problem of crushing of a filter cake is solved, and the service life of the filter cake is prolonged. The method realizes the spanning of high pollution and low efficiency of sand washing mud treatment to recycling and high performance, has triple values of process innovation, environmental protection standard reaching and economic feasibility, and provides an efficient solution for recycling of building wastes. Meanwhile, the invention is suitable for multi-scene building application of roadbed materials, baking-free bricks, artificial aggregates and the like.