577results about "Water softening" patented technology

The disclosure relates to an intelligent dosing control method, device and system for softening and removing hardness. Based on calculation by the intelligent dosing control method or device for softening and removing hardness of the disclosure, a softening agent dosing scheme can be intelligently recommended, while allowing the dosage adjustment in real time, thereby realizing the real-time and precise dosing of agents throughout the process. The intelligent dosing control system for softening and removing hardness of the disclosure automatic monitors the inlet water quality, and the dosing device can be controlled to perform precise dosing of agents through the calculation by the intelligent dosing control method or device for softening and removing hardness. Based on the monitoring feedback of outlet water quality and then calculation by the intelligent dosing control method and / or device for softening and removing hardness, the agent dosage can be automatically readjusted.

Methods, systems and devices for removing iodide from an aqueous solution including submerging an iodophilic electrode in an aqueous solution containing iodide, applying a current to the electrode, and electrochemically oxidizing the iodide to iodine within the electrode. The electrode may include an iodophilic material and an electrically conductive material. It may also include a binder. The iodophilic material may be a starch, chitosan, carboxycellulose, cationic polymer, or an anion exchange membrane material, for example. After oxidizing the iodide to iodine within the electrode, the electrode may be submerged in a second solution and a current may be applied to reduce the iodine and release it from the electrode in the form of iodide into the second solution.

The invention belongs to the field of oil and gas field high-salinity wastewater treatment, and particularly relates to a shale gas high-salinity wastewater electrochemical catalysis coupling membrane separation low-carbon treatment method which comprises the treatment steps of pretreatment, electrocatalytic oxidation, membrane separation, salt recycling and product recovery, intelligent management and control, energy coupling and the like. The dissolved air flotation unit generates micro-nano bubbles through a venturi-rotational flow coupling device and cooperates with PAC / PAM to realize efficient flotation; softening agents are added into the multi-stage sedimentation tank by stages, closed-loop control is carried out, and soluble barium, boron, fluoride and hardness are removed; the electrochemical oxidation unit strengthens mass transfer through ultrasonic waves and degrades organic matters difficult to treat; the membrane treatment realizes up-to-standard discharge of wastewater through a hollow fiber membrane bioreactor-roll type ultrafiltration membrane-anti-pollution type reverse osmosis membrane integrated system; the magnetic control evaporation crystallizer utilizes the magnetic field gradient and the temperature gradient to cooperatively regulate and control the crystallization process, the membrane separation strong brine is subjected to quality separation treatment, and high-purity salt products are produced. The method provided by the invention can effectively realize up-to-standard discharge treatment of shale gas fracturing flowback wastewater and resource utilization of evaporative crystallization salt, is also suitable for treating shale gas recovery wastewater with similar water quality characteristics, and has good popularization and application prospects.

The invention discloses an electrochemical descaling process ion concentration dynamic balance control method and system, and relates to the field of water treatment of a circulating cooling water system.The method comprises the steps that a multi-parameter sensor is deployed to collect calcium and magnesium ion concentration, pH, conductivity, flow and other multi-dimensional data in real time, and an electrochemical deposition dynamic model is combined; dynamically evaluating the time sequence change trend of the ion concentration; according to the method, an ion concentration dynamic balance control algorithm is constructed, and the current density adjusting quantity is calculated by synthesizing ion concentration deviation and historical integral deviation, so that the target current density of the electrochemical reactor is adaptively adjusted, and the system is always maintained in a target concentration interval under different inlet water quality and load conditions; precise electrolysis control is achieved by periodically adjusting power output, and the descaling efficiency and energy consumption are effectively balanced. Therefore, the self-adaptive adjustment of the electrochemical descaling process is realized, and the stability and the self-adaptability of the descaling process are remarkably improved.

The invention belongs to the field of oil and gas field wastewater treatment, and particularly relates to a shale gas fracturing flowback wastewater treatment system and method, and the system comprises treatment units such as adjustment homogenization, dissolved air flotation, multi-stage chemical precipitation, coagulation separation, electrochemical catalytic oxidation, membrane treatment and magnetic control evaporative crystallization. The dissolved air flotation unit generates micro-nano bubbles through a venturi-rotational flow coupling device and cooperates with PAC / PAM to realize efficient flotation; softening agents are added into the multi-stage sedimentation tank by stages, closed-loop control is carried out, and soluble barium, boron, fluoride and hardness are removed; the electrochemical oxidation unit strengthens mass transfer through ultrasonic waves and degrades organic matters difficult to treat; the membrane treatment realizes up-to-standard discharge of wastewater through a hollow fiber membrane bioreactor-roll type ultrafiltration membrane-anti-pollution type reverse osmosis membrane integrated system; the magnetic control evaporation crystallizer utilizes the magnetic field gradient and the temperature gradient to cooperatively regulate and control the crystallization process, the membrane separation strong brine is subjected to quality separation treatment, and high-purity salt products are produced. The method provided by the invention can effectively realize up-to-standard discharge treatment of shale gas fracturing flowback wastewater and resource utilization of evaporative crystallization salt, is also suitable for treating shale gas recovery wastewater with similar water quality characteristics, and has good popularization and application prospects.

The invention relates to the technical field of wastewater treatment, in particular to a method for cooperatively treating petrochemical wastewater based on porous carbon and micro-nano bubbles, which comprises the following steps: S1, pretreating the petrochemical wastewater; s2, carrying out micro-nano aeration on the pretreated petrochemical wastewater by adopting a micro-nano bubble generation device to obtain aerated wastewater; s3, the aerated wastewater is subjected to adsorption treatment through modified porous carbon, purified wastewater is obtained, and the modified porous carbon is biomass porous carbon loaded with rose red ammonium tricarboxylate. According to the invention, through a cooperative treatment process of pretreatment, micro-nano bubble oxidation and modified porous carbon adsorption, efficient removal of multiple types of pollutants (including refractory organic matters, heavy metals and suspended particulate matters) is realized, the wastewater treatment efficiency is improved, and the operation cost is reduced.

The invention relates to the technical field of industrial production wastewater treatment, and particularly provides a resource utilization method of calcium chloride high-salt water containing high-concentration organic matters. The method comprises the steps of pretreatment, wet catalytic oxidation, salt type conversion, softening filtration, deep oxidation, nanofiltration purification and targeted adsorption, no residual mother liquor exists, no secondary pollution is generated, organic matters in effluent are stable and reach the standard, the water quality and water quantity fluctuation resistance is high, heterogeneous and homogeneous catalysts are combined for catalysis, and the purification effect is good. According to the method, the sodium chloride solution is used as a raw material, the homogeneous catalyst is recycled, in addition, most of salt in the homogeneous catalyst is also recycled, resource reutilization is fully achieved, the treatment cost is reduced, and the treated sodium chloride solution can be used as primary saline water for subsequent ion membrane electrolysis.

The invention relates to the technical field of wastewater treatment in the water treatment technology, in particular to a wastewater treatment multistage dynamic quantification control system based on result feedback, which comprises a storage module, an identification module, a quantification module and an execution module, the storage module stores a causal chain in a reaction process, the identification module identifies a matching state of a current operation parameter and the causal chain and enables the quantification module to determine a risk index, and the execution module performs control optimization to execute corresponding measures based on the determined risk index. Tracking intervention from a pollution source to a derivation phenomenon is realized, a pollution migration problem implied in wastewater treatment is converted into an identification item of quantitative operation, and limitation of traditional single-point identification control is broken through through sequential logic verification and a multi-dimensional matching degree fusion mechanism. The accuracy of membrane pollution prevention and control and the resource utilization efficiency are improved while the process continuity is guaranteed, and a closed-loop control normal form of traceability pre-judgment dynamic quantification grading interception is formed.

The utility model provides a softening and hardness-removing device system for high-salinity wastewater. The device system comprises a reaction unit, a dosing unit and a central control unit, the reaction unit comprises a water inlet pipeline, a precipitation reactor and a water outlet pipeline which are connected in sequence; the water inlet pipeline is provided with a first detection module, the precipitation reactor comprises a plurality of purification monomers, each purification monomer is provided with a second detection module, the water outlet pipeline is provided with a third detection module, and the first detection module, the second detection module and the third detection module are used for detecting the quality of wastewater; the chemical adding unit is used for providing chemicals for the purification monomers; the central control unit is electrically connected with the first detection module, the second detection module, the third detection module and the dosing unit respectively. According to the high-salinity wastewater softening and hardness removing device, efficient and convenient softening and hardness removing of high-salinity wastewater are realized through accurate dosing control.

The invention discloses a printing and dyeing wastewater zero-discharge treatment process based on low-pressure high-power membrane concentration and salt separation synergy. The wastewater is sequentially subjected to the steps of double-alkali softening pretreatment, organic pollutant treatment, forward osmosis low-pressure high-power concentration treatment, salt separation treatment and evaporative crystallization. Wherein the forward osmosis low-pressure high-power concentration treatment is performed in a partitioned manner along the flow direction, the osmotic pressure difference is gradually increased, the transmembrane pressure difference is gradually decreased, and interface electrochemical buffer and low-frequency gas-liquid disturbance can be set to inhibit concentration polarization and pollution. Carrying out nanofiltration and salt separation on the concentrated solution to obtain two paths of saline water mainly comprising Na2SO4 and NaCl, and respectively carrying out evaporative crystallization on the two paths of saline water; and refluxing and reusing the water produced by the draw solution. According to the process, high-power concentration and stable salt separation are realized under low mechanical pressure, the energy consumption is reduced, the water recovery rate and the crystal purity are improved, and zero discharge of wastewater is realized.

The utility model relates to a hardness removal device for wastewater dosing medium, including an equipment body, wherein a water outlet weir, a special-shaped inclined plate area, a crystallization and separation area, and a crystal nucleus mud storage area are sequentially arranged inside the equipment body from top to bottom, the water outlet weir is provided with a water outlet, the crystallization and separation area is provided with a reagent mixed crystal nucleus initial coagulation system, the reagent mixed crystal nucleus initial coagulation system is provided with a coagulant dosing and flushing port, a flocculant dosing port and a medium dosing port from top to bottom, the bottom of the reagent mixed crystal nucleus initial coagulation system is connected to a mixer, the mixer is provided with a total water inlet, the mixer is provided with a chemical agent dosing port, and the bottom of the crystal nucleus mud storage area is provided with a mud discharge port. The heterogeneous nucleation reaction of this device has the advantages of rapid nucleation, good precipitation effect, and small dosage of reagents.

The invention discloses a softening treatment method for high-calcium and high-sulfate radical sewage. By adding the seed crystal, calcium sulfate is crystallized to achieve the purpose of removing calcium ions, so that the generation of chemical sludge is avoided, and the cost of treating the chemical sludge is further reduced; according to the invention, the seed crystal is selected according to the saturation degree of the sewage, and the dosage of the seed crystal is determined, so that the selection of the optimal seed crystal type and dosage is achieved, the cost is saved, and the purpose of softening water is achieved.

The invention provides an intelligent lime adding control method and system and a medium. The method comprises the following steps: acquiring real-time water flow data, calculating to obtain effective water flow parameter data, processing by combining the obtained historical average water flow parameter data and historical lime average dosage data to obtain predicted lime dosage data, acquiring lime performance parameter data and lime average reaction duration data, and processing to obtain lime effective utilization rate data; lime adding quantity demanded data are obtained by processing lime effective utilization rate data and lime predicted dosage data, then screw conveyor grade data are obtained through threshold value comparison, and finally the purified water state is obtained through threshold value comparison after purified water standard parameter data and purified water real-time parameter data are processed. Further adjusting the lime adding demand quantity data; therefore, intelligent adding of the lime is realized through calculation of the predicted lime dosage data, the lime effective utilization rate data and the lime adding demand quantity data and determination of the state of the purified water.

The invention relates to the technical field of water treatment, and particularly discloses a crystal nucleus granulation induced hardness removal integrated water treatment process which comprises the following steps: firstly, ultrasonically dispersing nano-hydroxyapatite in deionized water, adding gamma-glycidoxypropyltrimethoxysilane for reaction, and treating to obtain a silanized hydroxyapatite crystal nucleus; the sodium polyacrylate reacts with aluminum sulfate and the like in an ethylene glycol solution to prepare the composite inducer. The preparation method comprises the following steps: reacting the two components in a phosphate buffer solution in proportion to obtain inducer-loaded crystal nucleus particles, carrying out multi-step reaction and treatment on the inducer-loaded crystal nucleus particles with calcium chloride and the like to obtain surface-coated crystal nucleus granulation bodies, and mixing the surface-coated crystal nucleus granulation bodies with cationic polyacrylamide and nano-zinc oxide to prepare the reinforced hardness removal agent. When to-be-treated water is treated, the reinforced hardness removal agent is added, stirring and precipitation are performed, supernate sequentially passes through the activated carbon filter column to adsorb impurities and is sterilized by the ultraviolet disinfection device, and finally effluent is collected, so that the hardness in the water can be efficiently removed, the process integration level is high, and the effect is good.

A water treatment system centrally communicates and controls one or more water treatment devices to regulate the use of the one or more water treatment devices. The water treatment system is configured to enable a localized, on-demand supply of purified water throughout a building or a network of buildings. The water treatment system may control a degree of purity (e.g., water hardness or concentration of dissolved salts) via mixing of purified and unpurified water streams in a controllable ratio (e.g., via one or more controllable valves or one or more tunable water softening units).

The invention relates to the technical field of water treatment, and mainly relates to a composite electrode unit, an electrochemical water treatment system and an electrochemical water treatment method. The composite electrode unit comprises an electrolyzed water cathode, a porous insulating filler layer and an electrolyzed water anode; the porous insulating filler layer is positioned between the electrolyzed water cathode and the electrolyzed water anode; the internal material of the porous insulating filler layer does not contain exchangeable ions, and the internal part refers to a non-surface part. According to the device, a cathode and an anode are respectively integrated on two sides of a porous insulating filler layer to form a unique composite electrode unit with a filler-electrode integrated structure. Under the driving of ultra-low direct-current working voltage, the transfer of water is controlled through filler micro-channels to realize the migration blocking of hydroxyl radicals, and meanwhile, the hydroxyl radicals are diffused into a water-phase main body of a cathode chamber by virtue of a local gradient diffusion effect generated by a catalytic reaction on the surface of an electrode and a forced diffusion effect of pumping; and scale-forming ions are quickly crystallized and separated out in a cathode region, and the hardness of water is reduced.

The invention relates to a treatment method and device for resource utilization of desulfurization wastewater in the technical field of desulfurization wastewater treatment, and the device comprises a pretreatment module, a magnesium removal module, a calcium removal module, a nanofiltration salt separation module, a concentration reduction module and a flue evaporation module, the method comprises the steps of pretreatment, magnesium removal treatment, calcium removal treatment, nanofiltration salt separation treatment, evaporative crystallization treatment and the like, heavy metals and suspended solids in the desulfurization wastewater are removed in the pretreatment module, a high-purity magnesium hydroxide product is extracted through the magnesium removal module, after calcium ions are removed in the calcium removal module, salt separation treatment is conducted through the nanofiltration salt separation module, and the high-purity magnesium hydroxide product is obtained. One part of the separated monovalent saline water is recycled, the other part of the separated monovalent saline water is concentrated and reduced by the concentration and reduction module and then enters the flue evaporation module to be evaporated, and the separated divalent saline water is recycled to a desulfurization system. The method has the advantages of simplicity and convenience in operation, economical operation, environment-friendly process and the like, high-purity magnesium hydroxide can be recycled, complete zero emission of the desulfurization high-chlorine wastewater is realized, and the method has a relatively high commercial application value.

The invention belongs to the field of high-salinity organic wastewater treatment, and particularly relates to a shale gas high-salinity wastewater electrochemical catalysis coupling membrane separation low-carbon treatment method which comprises the steps of pretreatment, electrocatalytic oxidation, membrane separation, salt recycling and product recovery, intelligent management and control, energy coupling and the like. Through cooperation of an electrochemical catalysis coupling membrane separation technology and mass transfer strengthening, anti-pollution design and intelligent optimization of an intelligent energy system, the treatment efficiency and the recycling level of the shale gas high-salinity wastewater can be remarkably improved, and low-carbon, economical and efficient treatment of the shale gas high-salinity wastewater is achieved; and the method can also be used for treating similar high-salt organic wastewater generated by conventional oil and gas resource development, and has good popularization and application prospects.

The present invention provides a treatment system for resin regeneration wastewater in a thermal power plant, which relates to the technical field of wastewater treatment. The system comprises a wastewater collection module, a sedimentation treatment module, a flotation treatment module, a filtration module, a reverse osmosis treatment module, a concentration module and an electrolysis treatment module, which are connected in sequence to form a complete treatment process for resin regeneration wastewater in a thermal power plant. Through the joint action of each module, effective treatment of resin regeneration wastewater in the thermal power plant is achieved; at the same time, effective treatment of resin regeneration wastewater is achieved, and the treated product can be reused for resin regeneration, thereby reducing pollution to the environment and achieving recycling of resources. Therefore, the above invention achieves standard discharge or resource utilization of wastewater through an efficient and environmentally friendly wastewater treatment system, which is of great significance for promoting the green development of thermal power plants.

The invention relates to the technical field of fracturing flow-back fluid treatment, and discloses a fracturing flow-back fluid discharge treatment process and device.The fracturing flow-back fluid discharge treatment process comprises a pretreatment unit, a membrane concentration reduction unit and a deep treatment unit, and the pretreatment unit comprises an oxidation gel breaking reaction zone, an air flotation treatment zone and a magnetic coagulation reaction system; comprising the following steps: S1, the fracturing flow-back fluid firstly enters a regulating tank and then enters an oxidation gel breaking reaction zone; s2, entering the air flotation treatment area; s3, the wastewater firstly enters the hardness removal reaction tank and enters the coagulating sedimentation area for reaction, and the precipitated sludge enters the magnetic powder recovery subunit; s4, water discharged from the pretreatment system enters a membrane concentration decrement unit; s5, the membrane concentrated solution enters a BDD electrooxidation system, organic matter in water is oxidized through a BDD electrode, BDD effluent enters an MVR evaporation system to be evaporated, and MVR evaporation mother liquor enters a mother liquor drying system. According to the invention, the treatment efficiency of the fracturing flow-back fluid can be improved on the whole.

The utility model provides an organophosphorus-containing wastewater treatment system. The organophosphorus-containing wastewater treatment system comprises an adjusting tank, an oxidation unit, a physicochemical treatment unit and a biological reaction unit which are connected in sequence, wherein the adjusting tank is provided with an acid-base medicament feeding port; the oxidation unit is provided with an oxidant feeding port; the physicochemical treatment unit comprises a coagulation zone, a flocculation zone and a sedimentation zone which are connected in sequence; the coagulation area is provided with a coagulant feeding port, the flocculation area is provided with a flocculant feeding port, the bottom surface of the coagulation area is communicated with the bottom surface of the flocculation area through a pipeline, and the bottom surface of the coagulation area is higher than the bottom surface of the flocculation area; a biochar layer is arranged in the biological reaction unit and is suitable for degrading organic phosphorus-containing wastewater. The organophosphorus-containing wastewater treatment system disclosed by the utility model can realize efficient treatment of the organophosphorus-containing wastewater.

The invention provides a green carbon neutralization treatment method and system for concrete wastewater, and belongs to the technical field of sewage treatment.The treatment method comprises the following steps that S1, sand and stone separation is conducted, specifically, concrete cleaning slurry is subjected to settling to separate out sand and stone, and primary slurry is obtained; s2, filtering: performing solid-liquid separation on the primary slurry obtained in S1 to obtain secondary filtrate; S3, neutralizing with organic acid: adding the organic acid into the secondary filtrate obtained in S2 to adjust the pH value to a preset value; s4, aeration neutralization: carrying out aeration neutralization on the filtered water treated in S3 until the pH value of the filtrate reaches the emission standard; the aeration gas is selected from any one or more of air and industrial waste gas containing CO2. In addition, the invention further provides a system suitable for the method, organic acid neutralization and aeration neutralization are combined, and a concrete wastewater treatment solution which is efficient, low in cost, stable in treatment effect and easy and convenient to operate is provided.

The invention discloses an efficient treatment process for salt-containing industrial wastewater, and relates to the technical field of wastewater treatment. Salt-containing industrial wastewater sequentially passes through an adjusting tank, a silicon and hardness removal unit, a biochemical unit, a secondary sedimentation tank, a fluorine removal unit, a filter unit, a catalytic ozonation unit, a moving bed bio-membrane reactor treatment unit, a powder carbon sedimentation unit and an ultrafiltration-reverse osmosis double-membrane unit to be treated, produced water is recycled, and concentrated water enters an evaporation and concentration unit; the silicon removal and hardness removal unit is used for treating the wastewater by adding a flocculating agent and a composite coagulant aid; the flocculating agent is a chitosan-based flocculating agent, and the addition amount of the flocculating agent is 10 to 20 mg / L; the composite coagulant aid is composed of a magnesium-aluminum hydrotalcite coagulant aid and alginic acid-silicate hybrid microgel according to the mass ratio of 2: (1-4), and the addition amount of the composite coagulant aid is 5-15 mg / L. The treatment effect of the salt-containing industrial wastewater is remarkably improved.

The invention provides a reverse osmosis concentrated water cleaning treatment system and a treatment method thereof, and relates to the technical field of water treatment. The system comprises a descaling, turbidity-removing and organic matter-removing integrated fluidized bed subsystem, an electrodialysis subsystem and a secondary reverse osmosis subsystem which are arranged in sequence, the descaling, turbidity-removing and organic matter-removing integrated fluidized bed subsystem comprises a crystallization and granulation fluidized bed reactor, a seed crystal feeding unit, an alkali liquor feeding unit, a medicament feeding unit, a particle discharge unit, a sludge discharge unit, a concentrated water injection unit and a water outlet unit, and a solid-liquid separator is integrally arranged at the top of the crystallization and granulation fluidized bed reactor. The system disclosed by the invention can realize multiple effects of descaling, turbidity removal and organic matter removal, and has the characteristics of small occupied area, cyclic utilization of chemicals, more recovered products, high organic matter removal rate, cleanness and high efficiency.

The invention belongs to the technical field of direct drinking water processing, and particularly relates to a direct drinking water softening and sterilizing device which comprises a bottom plate, the two sides of the upper end face of the bottom plate are fixedly connected with a softening pool and a sterilizing pool respectively, one side of the bottom of the softening pool is communicated with the sterilizing pool through a connecting pipe, and a drainage pipe is arranged on one side of the sterilizing pool. An ultraviolet germicidal lamp is arranged at the top of an inner cavity of the sterilization tank, and a feeding auxiliary mechanism used for uniformly adding lime and soda into the softening tank is further arranged on the softening tank. By means of the feeding auxiliary mechanism, lime and soda discharged from the discharging port can make contact with leaves, the lime and the soda are scattered, the distribution area of the lime and the soda on the water surface is enlarged, meanwhile, the caked and coagulated lime and the soda can also be scattered, and therefore the lime and the soda can be evenly added into water, and the situation that the lime and the soda are not prone to falling off due to the fact that the water surface area is too large is avoided. And an operator is not easy to uniformly add lime and soda into water.

The present invention discloses a zero-emission process for the coordinated treatment of multi-source wastewater in a steel mill. This process features zero-emission selective separation of desalted water and coal gas condensate from a softening station, recovery of natronasite from cold-rolling rinsing wastewater using high-pressure nanofiltration concentrate, coordinated treatment of high-pressure reverse osmosis concentrate with desulfurization wastewater and high-salt solid waste ash, and low-cost treatment of ammonia and nitrogen. The coordinated treatment of multi-source wastewater and high-salt solid waste ash significantly reduces the pollutant content in ash washing water, thereby reducing subsequent wastewater treatment costs and wastewater usage, significantly lowering the disposal costs of solid waste and wastewater, and achieving internal consumption and zero-emission of multi-source wastewater.

Methods, systems and devices for PFAS destruction including adding a sulfite salt to an aqueous solution containing PFAS and then irradiating the aqueous solution with light at 222 nm. The method may include adding a base to the aqueous solution in an amount sufficient to raise a pH of the aqueous solution including PFAS to about 10 or more. It may also include adding a halide salt such as a bromide salt or an iodine salt, and further adding a carbonate. Greater than 90%, or greater than 99%, of the PFAS in the solution may be destroyed by irradiating the aqueous solution in this way.

The treatment system comprises a crystallization and granulation fluidized bed, a particle collection device and a solid-liquid separation fluidized bed, the upper portion of the crystallization and granulation fluidized bed is provided with a feeding port and a circulating water outlet, and the lower portion of the crystallization and granulation fluidized bed is provided with a sewage inlet. The particle collecting device is connected with the crystallization and granulation fluidized bed, the lower part of the solid-liquid separation fluidized bed is provided with a circulating water inlet and a sludge discharge port, and the upper part of the solid-liquid separation fluidized bed is provided with a flocculant feeding port and a circulating water discharge port. According to the method, the seed crystal and the medicament are added into the municipal sewage, so that calcium ions in water are subjected to chemical reaction to generate calcium carbonate crystals and are recycled, the waste of resources is reduced, the output of sludge is reduced after the calcium carbonate is recycled, and the treatment cost of the sludge is reduced.

The invention provides a mine water softening and dosing system and a control method, and belongs to the technical field of water treatment equipment, and the mine water softening and dosing system comprises water treatment equipment, a detection mechanism, an adjusting mechanism and a control unit. Through cooperation of the detection mechanism and the control unit, feed-forward detection and feed-back detection of softening treatment of mine water are achieved, and the control unit can achieve determination of the initial feeding amount of drugs and adjustment of subsequent feeding according to the feed-forward detection and the feed-back detection; the flow, alkalinity and pH value of inlet water and outlet water as well as the turbidity and alumen ustum image of the outlet water are detected at the same time, and the control system can comprehensively sense the water quality change and the treatment effect according to the detection result, so that the refined and automatic adjustment of the addition of various medicaments is realized, the dependence on human eye observation and manual test is reduced, and the operation is simple and convenient. The intelligent level and the operation efficiency of the whole water treatment process are improved.

The invention discloses a pretreatment process for water reuse of silicon solar cell wastewater, which comprises a collection device, the output end of the collection device is communicated with a pretreatment device 1, the output end of the pretreatment device 1 is communicated with a pretreatment device 2, the output end of the pretreatment device 2 is communicated with a pretreatment device 3, and the output end of the pretreatment device 3 is communicated with a pretreatment device 4. The output end of the pretreatment device 3 is communicated with a rear-end reclaimed water recycling membrane system. The method has the advantages that specific pollutants influencing the reclaimed water reuse membrane system are subjected to targeted grading pretreatment, a new thought is provided for recycling of the silicon solar cell wastewater, and remarkable environmental benefits and economic benefits are achieved; the problems of low water production rate, short service life, high operation cost and incapability of continuous and stable operation of a reclaimed water recycling membrane system for silicon solar cell wastewater are solved.