296results about How to "Increase the concentration factor" patented technology

The invention relates to a process and a device for extracting battery grade lithium from brine. The process comprises the following steps: adding an adsorbent into the brine to adsorb lithium ions in the brine, intercepting the adsorbent by using a ceramic membrane filter, performing plate-frame pressure filtration on the ceramic membrane concentrated solution to obtain an adsorbent filter cake, washing and desorbing the adsorbent filter cake so as to obtain a desorption solution; removing magnesium in the desorption solution through a nanofiltration membrane system, entering the nanofiltration membrane permeate into an ion exchange resin tower for performing deep magnesium removal, concentrating through a reverse osmosis membrane, performing deep concentration in a DTRO membrane or electrodialysis equipment, evaporating the concentrated solution, adding BaCl2, Na2CO3 and NaOH into the solution, stirring, filtering in a ceramic membrane filter, performing plate-frame pressure filtration on the ceramic membrane filtrate, adding Na2CO3 into the clear liquid, preparing Li2CO3, washing Li2CO3 through a ceramic membrane, centrifuging, and drying, thereby obtaining the finished battery grade Li2CO3 product.

The invention discloses a method for extracting lithium hydroxide by salt lake brine. The method is characterized by comprising the following steps: firstly, removing calcium and magnesium ions in salt lake brine by adding sodium carbonate; concentrating the obtained brine with low lithium-magnesium ratio through ordinary electrodialysis to obtained concentrated brine; adding sodium carbonate to the concentrated brine and removing the calcium and magnesium ions again; adding sodium carbonate to obtain lithium carbonate through a multi-step crystallization method; preparing the lithium hydroxide by an electrolysis-bipolar membrane electrodialysis system after dissolving the lithium carbonate again. The traditional distillation process is replaced by ordinary electrodialysis, so that energy consumption is reduced, and the method is friendly to environment. In addition, the lithium hydroxide is produced by using an electrolysis-bipolar membrane electrodialysis technology, the defects of high energy consumption and low purity in the traditional lime method and electrolytic process are avoided, the capacity of the lithium hydroxide is improved, no waste residue is generated in the process, and the method is friendly to environment. Taken together, the method is simple to operate, low in energy consumption, friendly to environment, and expanded production is easy to achieve.

A compound inhibition antisludging agent is used for treating high-concentration circulation water, comprising a liquid part and a solid part. Based on that the total weight of the liquid part is deemed to be 100 percent, percentages of each component by weight are: organic phosphonic acid 5-40 percent, organic carboxylic acid 5-40 percent and water 20-90 percent; and based on that the total weight of the solid part is deemed to be 100 percent, percentages of each component by weight are: polymer with antisludging effect 5-35 percent, alkaline agent 45-80 percent, azoles 1-10 percent and zinc salt 1-10 percent. The concentrations of the liquid part and the solid part in the circulating water are that: the solid part: the dosage of the agent added into make-up water is 20-200mg/L; the liquid part: total phosphine kept in the circulating water system is 10-15mg/L. The invention has effects of inhibition, antisludging, sterilization and algae removal upon meeting the requirements of the state, can promote the concentration multiple of the circulating water system up to 7.5 or more and can be operated at normal temperature with good effect and without pre-membrane treatment.

The invention discloses a method for realizing approximate zero discharge of high-fluorine-content and high-nitrogen-content battery production waste water in the photovoltaic industry. The method comprises the following steps: feeding high-fluorine-content and high-nitrogen-content battery production waste water into a regulating tank for homogenizing; feeding into a fluorine-removing reaction tank, and feeding a reaction tank effluent into a sedimentation tank; feeding a supernatant in the sedimentation tank into a middle water tank; treating by virtue of a quartz sand filter and an active carbon filter, and feeding fresh water into a primary reverse osmosis membrane for treating; driving reverse osmosis membrane concentrated water to flow through a concentrated water induced acceleration crystallizing pond to precipitate calcium ions and fluorine ions in concentrated water on a seed crystal at a higher speed, effectively lower the concentrations of calcium ions and fluorine ions and increase the concentration multiple of a reverse osmosis concentration membrane, driving supernatant to flow through a cartridge filter, and feeding into the reverse osmosis concentration membrane for circularly concentrating; feeding a small amount of concentrated water on the reverse osmosis concentration membrane into an evaporator to greatly lower the evaporation cost, feeding steam condensed water into a recycling water tank for use as industrial water, and disposing evaporation residues as solid waste. In the entire process, no water pollutant is discharged.

The invention relates to a method and a device for extracting bitten lithium chloride. The method specifically comprises the steps: 1, adsorbing lithium ions by bittern in a lithium-containing salt lake old brine pool through an aluminum salt adsorbing agent, desorbing by using water to obtain a desorbing solution; 2, filtering the desorbing solution by using a coarse filter; 3, filtering permeate of the coarse filter by using a nanofiltration membrane to obtain permeate of the nanofiltration membrane; 4, concentrating the permeate of the nanofiltration membrane by using a reverse osmosis membrane to obtain a reverse osmosis concentrated solution; and 5, carrying out baysalt or evaporating on the reverse osmosis concentrated solution to obtain lithium-containing concentrated brine. According to the method, the problems that the concentration multiple in a reverse osmosis station can not be increased, the baysalt efficiency is low and a plenty of reagents are consumed in precipitation in a conventional process for extracting lithium from brine can be solved, and the obtained lithium chloride solution is high in yield and high in purity.

The environment protecting water quality stabilizer consists of scale inhibitor, corrosion inhibitor, assistant compounded together, and has the features of high efficiency, low toxicity and environment friendship. The water treating agent may be used in water system to produce corrosion inhibiting and scale inhibiting dispersion effect and may be used in the conditions of high hardness, high pHand high concentration multiple. The water treating agent may be used in circulating cooling water system with calcium hardness up to 750-1300 ppm, and in make-up water calcium hardness of 120 ppm, the concentration multiple may reach 10, being in zero-exhaust level.

The invention relates to an electro-deionization method and device for concentrating and purifying heavy metal wastewater synchronously, belonging to a wastewater treatment technique, which adopts first-stage two-section or first-stage multi-section electro-deionization device, wherein the inner sides of the positive and negative poles are arranged with corresponding pole protection chambers, the desalting chamber is filled with large-hole strong-acid strong-base mixed bed resin with narrow particles distributed; cation exchange film is adopted as the direction-turning film, after direction-turning, two adjacent concentration chambers are arranged continuously, both are separated by cation exchange film, simultaneously after direction-turning, the first concentration chamber is filled with large-hole mixed bed resin with the volume of cathode resin more than 50 percent, the heavy metal wastewater to be treated enters the desalting chamber and the concentration chamber in two paths, the heavy metal ion and cathode in the desalted water flow are transferred into the concentration chamber so as to obtain the desalted water, the concentrated water flow is partially circulated or closely circulated so as to obtain the concentrated liquid of metal wastewater, thereby recycling valence metals and pure water resources synchronously and realizing zero emission and resource treatment of wastewater. Compared with the prior art, the wastewater treatment process has higher separation efficiency, more reliable operation, more convenient operation, continuous process operation and no secondary pollution.

The invention relates to a processing technology for recovering and utilizing the mother solution of glyphosate as a resource, which comprises the following concrete steps: firstly, preprocessing themother solution of glyphosate, and then, separating, concentrating and recovering the glyphosate by a membrane combination technique; returning the concentrated solution to a crystallization working section in the production process of the glyphosate after membrane filtration, thereby effectively recovering and utilizing the glyphosate resource; adsorbing the diluted solution with high efficiency,and further recovering and utilizing the glyphosate; and processing the adsorbed solution by catalytic oxidation with high efficiency to recover the sodium chloride resource with higher purity. The invention achieves the purposes of recovering and utilizing the glyphosate in the mother solution as a resource to the maximum extent and efficiency separating, recovering and utilizing the sodium chloride as a resource, has the advantages of economical technology, high efficiency, good system stability, high safety, easy operation, convenient industrial amplification, and the like, solves the problems of the soil salinization caused by applying water agents with high content of sodium chloride, the processing and disposal of solid wastes of the sodium chloride and the environment pollution, and effectively recovers and utilizes the resources of the glyphosate and the sodium chloride in the mother solution of the glyphosate.

The invention relates to a polynary composite water treatment agent which mainly comprises terpolymer containing sulfonic acid radicals, organophosphorus acids, zinc salts and metal inhibitors, wherein the effective concentration weight ratio being 20-40 : 1-10 : 0.5-4 : 0-3.

The invention discloses a complex enzyme preparation for extracting effective plant components and a method for preparing the complex enzyme preparation. The complex enzyme preparation comprises components of glycanase, cellulase, pectinase, beta-glucanase and alpha-amylase. The activity of the glycanase is 3000IU/g, the activity of the cellulase is 2000IU/g, the activity of the pectinase is 20000IU/g, the activity of the beta-glucanase is 5000IU/g, and the activity of the alpha-amylase is 3000IU/g. The method for preparing the complex enzyme preparation includes symbiotically cultivating, extracting and concentrating bacillus licheniformis, bacillus subtilis, aspergillus niger and trichoderma viride according to certain proportions, then adding expanded plant protein carriers into the bacillus licheniformis, the bacillus subtilis, the aspergillus niger and the trichoderma viride; spraying mist at low temperatures to obtain the complex enzyme preparation. The complex enzyme preparation and the method have the advantages that the effective component recovery rate of complex enzymes can be increased as compared with a method for individually fermenting and producing various enzymes and then combining the various enzymes with one another, production technologies can be simplified, the production cycle can be shortened, the production cost can be lowered, the production efficiency can be greatly improved, the stability of the activity quality of final products can be guaranteed, and plant extraction complex enzyme production can be industrialized.

An apparatus for removing the suspended substance from water is a filter unit which is composed of cylindrical tank, overflow dam, water outlet tube, water inlet tube, water distributor, filtering material washer, fairing unit, filtering material distributor, cyclic filtering material lifting tube and air distributor. It features its additional suspended substance separator, between the outlet of said lifting tube and filtering material washer.

The invention discloses a circulating cooling water biological treatment method and belongs to the technical field of industrial water treatment. The method includes the steps of arranging a packed bed in a circulating cooling water tank for providing conditions for implantation of added microorganisms and disposing a circulation pump beside the circulating cooling water tank; adding four kinds of bacteria of yeast, purple non-sulfur bacteria, acetic acid bacteria and bacillus bacteria which are mixed in any proportion to the circulating cooling water tank, wherein the total monthly amount of the bacteria liquid is 0.05-1% of the water in a system; arranging a sludge removal pump in the circulating cooling water tank for regular sludge removal. Furthermore, the invention also provides a method for adjusting the pH of the circulating cooling water system. The circulating cooling water biological treatment method can improve the concentration multiple of the circulating cooling water, reduce the amount of make-up water of the circulating cooling water system, and is fast, easy, effective and environmentally friendly.

The invention discloses a total membrane separation method of producing a lithium extracting mother liquor with multi-stage membrane concentration of salt lake brine. The total membrane separation method comprises the following steps of (1) using a microfiltration purification system to perform pretreatment on the salt lake brine, removing suspended matters, colloid and other impurities in the salt lake brine, and then diluting the salt lake brine with fresh water to acquire microfiltration pretreated brine; (2) feeding the obtained microfiltration pretreated brine into a nanofiltration salt separation system, and performing separation to acquire a filtrate with monovalent cation as a priority and a concentrated solution with multivalent cation as a priority; (3) feeding the filtrate in the step (2) into a membrane concentration system, and performing concentration to obtain a lithium-enriched concentrated solution; and (4) feeding the lithium-enriched concentrated solution obtained inthe step (3) into a nanofiltration deep magnesium removing system, and performing deep magnesium removal with a nanofiltration membrane to obtain the lithium extracting mother liquor. The technologyis low in energy consumption, high in recovery rate, low in production cost, continuous and controllable in technology, high in reliability, low in magnesium-lithium ratio of the prepared lithium extracting mother liquor, high in lithium ion concentration and stable in quality and can be used for large-scale production.

The invention discloses a salt-containing wastewater treatment method. The wastewater goes through an adjusting tank, a softening sedimentation tank, a multi-medium filter, an ultrafiltration device, a first-section roll type reverse osmosis system, a second-section roll type reverse osmosis system, an ion exchange device, a roll type nanofiltration membrane device, a high-pressure reverse osmosis membrane system, a third-section roll type reverse osmosis system and an efficient evaporator. The treatment method disclosed by the invention has the advantages of strong anti-pollution capacity, solution of blocking problem, high concentration multiple, high recycling efficiency, high treatment efficiency, high automation degree, investment saving and low operation cost.

The invention discloses a forward osmosis absorption liquid using and recycling method and a forward osmosis absorption device, and belongs to the field of water treatment. According to the forward osmosis absorption liquid using and recycling method, raw material liquid is absorbed by the absorbing liquid in a forward osmosis device, so that in a raw material liquid concentration process, the absorbing liquid is an inorganic saline water solution and comprises dissolved sodium sulfate; the concentration of sodium sulfate is greater than 20wt%, and the temperature is 35-45 DEG C; the osmosis pressure of the absorbing liquid is 110-150bar; the recycling of the absorbing liquid comprises the processes of cooling crystallization and concentration recycling. By the use of the characteristic that the sodium sulfate solution is greatly different in dissolving degree due to different temperatures, the high-concentration sodium sulfate solution is used as the absorbing liquid, so that the concentration factor of the raw material liquid is increased as much as possible; when the absorbing liquid is recycled, a cooling crystallization device is added, and the concentration of sodium sulfate is reduced; under a condition of relative low pressure, the absorbing liquid is recycled by nano filtration or/and reverse osmosis concentration, and therefore, the energy consumption is low, and the cost is low; the investment and operation cost of equipment is lowered.

The invention discloses a method for decrement of a concentrated solution in the nuclear industry. The method specifically comprises the following steps: carrying out electroosmosis on radioactive wastewater in the nuclear industry to obtain an electroosmosis concentrated solution and an electroosmosis purified solution, wherein the PH value is 6-9, the saltness is 15-20g/L and the radioactive level is 3.7*10<4>Bq/L; separating the electroosmosis concentrated solution by a forward osmosis technology; returning a forward osmosis purified solution and a forward osmosis concentration solution after forward osmosis to an electroosmosis process, mixing the forward osmosis purified solution with the electroosmosis purified solution, and mixing the forward osmosis concentration solution with the electroosmosis concentrated solution; and synchronously and circularly carrying the above steps till the radioactive level of the electroosmosis purified solution is not higher than 60Bq/L, then, directly discharging the electroosmosis purified solution and exporting the electroosmosis concentrated solution for subsequent treatment. Through the coupling manner, the treatment efficiency of nuclear wastewater can be greatly improved, and the liquid level pressure difference deltah of a fresh water chamber and a concentrated water chamber is enlarged, so that positive and negative ions permeate to the concentrated water chamber more quickly.

The invention discloses a treating method for concentrating and separating ceftazidime mother liquor by using a membrane separation technology. The treating method mainly comprises the following steps: (1) carrying out pretreatment on the ceftazidime mother liquor to be treated, and removing fine suspended matters in the mother liquor; and (2) under the condition that the operation pressure is 0.5 to 4.0MPa, and the temperature is 10 to 80 DEG C, carrying out concentration and separation to a nanofiltration component for the ceftazidime mother liquor after pretreatment, obtaining concentrated liquor with the mass fraction of ceftazidime of more than 10 percent, collecting and then carrying out crystallization treatment; and the obtained permeate is discharged into a sewage treatment station for treatment. The treating method has the advantages of: effectively concentrating the ceftazidime mother liquor, not only recovering effective ingredient in the mother liquor, namely the ceftazidime, ensuring the quality of the ceftazidime, but also reducing the indexes of COD and BOD and the like discharged by the mother liquor, reducing the pollution and energy consumption, and having obvious economical and social benefits. The treating method can be widely applied in occasions needing to concentrate and recover the ceftazidime.

The invention relates to an efficient electrodialysis desalinizing device and method for coking wastewater. The device comprises a modified low-permeability anti-pollution ion exchange membrane, a corrosion-resistant titanium-based coating electrode with a low hydrogen and oxygen evolution overpotential, a waterproof and leakage-proof electric partition plate and an electrodialysis process control system for desalinizing coking wastewater, which are systematically integrated and optimized to construct an efficient electrodialysis device for desalinizing the coking wastewater. The method comprises the following step of deeply treating and desalinizing the coking wastewater by the efficient electrodialysis device, wherein freshwater is subjected to multi-stage desalination, so that the pre-treated coking wastewater reaches industrial reclaimed water standards, and the recovery rate of freshwater is over 85%; after being circulated and concentrated, the discharge amount of the concentrated water is smaller than 15% and discharged after the standards are achieved, and the system is stably operated. According to the device and the method for efficiently desalinizing by electrodialysis for coking wastewater disclosed by the invention, the problems such as a low freshwater recovery rate, great concentrated water discharge amount, severe membrane pollution, difficult long-term stable operation, and the like in the process of treating the coking wastewater by the conventional membrane technology are solved, and the engineering application of the electrodialysis technology in deeply treating and desalinizing the coking wastewater can be promoted.