45results about How to "High salt removal rate" patented technology

The invention relates to a method for preparing an electro-adsorption component by virtue of a self-assembly technology. The preparation mechanism of the electro-adsorption component is shown in the figure, wherein the electro-adsorption component comprises an electrode substrate (1), an adsorption material (2) and long chain polymer ions (3) assembled on the surface of the adsorption material. By using the abundant functional groups of the adsorption material, a layer of very thin long chain polyelectrolyte film with homogeneous charge is uniformly assembled on the surface of a solid through a non-covalent function, two electrode plates respectively provided with a positive charge polyelectrolyte film and a negative charge polyelectrolyte film are respectively connected with the positive pole and negative pole of a power supply, when the electro-adsorption component is used in electric adsorption desalting experiments, the positive charge film and the negative charge film formed by polymer ions can permeate ions with opposite charge and repel the homogenous charge, so that the ion adsorption efficiency is greatly accelerated, and the electro-adsorption component shows strong desalting capacity. The electro-adsorption component has the advantages of very thin surface assembly layer, low cost, short technological process and the like, and has good industrial application prospect.

The invention provides a vacuum membrane distillation water-treatment plant utilizing solar energy or waste heat, which belongs to the field of water treatment. The vacuum membrane distillation water-treatment plant comprises a membrane module, a distillation box, a cooling cylinder, a vacuum pump, a control system and a circulating system. The invention uses a vacuum membrane distillation method which has the separation principle that hot raw water to be treated passes through one side of the separation membrane, and the other side is vacuumized so as to form transfer vapor pressure difference on the two sides of the membrane; and the vacuum side only generates water vapor, and the water vapor is condensed into drinking water, thereby separating and purifying the raw water. The invention utilizes cheap energy sources, such as solar energy, low-grade waste heat and afterheat, or the like, and can recycle latent heat of condensation, thereby reducing the energy consumption. The vacuum membrane distillation water-treatment plant has the advantages of simple structure, small occupied area, low cost, high desalination rate, large membrane flux and the like, and can be operated continuously and realize automatic control.

The invention discloses a composite nano-filtration membrane, wherein a modified meta-aramid hollow fiber membrane is used as a base membrane, and polyamine, a diaminobenzene fluoride and polyacyl chloride are subjected to an interface polymerization reaction on the base membrane to form an ultra-thin polyamide layer. The invention further provides a preparation method of the composite nano-filtration membrane. With the technical scheme of the present invention, the pure water flux of the prepared composite nano-filtration membrane is more than or equal to 50 L / (m<2>.h) at 0.5 MPa, the desalination rate of the prepared composite nano-filtration membrane to the 2 g / L divalent cation salt solution is more than or equal to 80%, the required cost is low, and the method is suitable for industrial production; and the preparation method has characteristics of simpleness, mild reaction condition, stable product performance and wide market application prospect.

The invention discloses a preparation method of a polyamide reverse osmosis membrane containing an amphoteric carboxymethylcellulose sodium complex. The preparation method comprises the steps: firstly, preparing an amphoteric cationic polymer by a free radical polymerization method, then preparing an amphoteric carboxymethylcellulose sodium complex by an ionic crosslinking method, adding the amphoteric carboxymethylcellulose sodium complex into an aqueous phase monomer solution for preparing a polyamide membrane, and thus obtaining the polyamide reverse osmosis membrane containing the amphoteric carboxymethylcellulose sodium complex through an interfacial polymerization method. With utilization of good hydrophilicity, contamination resistance and a unique nanoparticle structure of the amphoteric carboxymethylcellulose sodium complex, the water permeation flux and contamination resistance of the membrane are greatly improved while the high salt interception rate of the polyamide membrane on an inorganic salt is kept. Under an operating pressure of 1.5 MPa at the temperature of 25 DEG C, the interception rate of the reverse osmosis membrane on NaCl is more than 97%, and the water permeation flux is more than 30 L.m<-2>.h<-1>. Therefore, the prepared polyamide reverse osmosis membrane containing the amphoteric carboxymethylcellulose sodium complex has high salt interception rate, water permeability and contamination resistance.

Provided is a composite semipermeable membrane having a high salt removal rate and a high water permeability. The composite semipermeable membrane comprises a substrate, a porous support layer formed on the substrate, and a separation functional layer formed on the porous support layer, the hydrophilic macromolecule concentration on the substrate-side surface of the porous support layer being higher than that on the separation functional layer-side surface.

This invention discloses an electrolyte solution of removal salt from ferroconcrete with electrochemistry method, which comprises lithium hydrate, boric acid and calcium hydrate solution; the substantial weight ratio between lithium hydrate and boric acid is: lithium hydrate: boric acid=1: 1.5-2.5; after adding them into saturated calcium hydrate solution, the concentration of lithium tetraborate solution produced in reaction is theoretically 0.01-0.001mol / L. The invention comprises the following merits: the electrolyte solution is of high efficiency of removing salt, and can alkalinize reinforcement again, improve aperture framework of aperture, prevente reaction of base material, with low cost of removing salt.

The invention relates to a novel high-flux positively charged nanofiltration membrane and a preparation method thereof. The novel high-flux positively charged nanofiltration membrane comprises a porous supporting layer and a positively charged nanofiltration selection layer; the positively charged nanofiltration selection layer is formed by carrying out interfacial polymerization reaction on a water phase solution and an oil phase solution and then carrying out heat treatment; the water phase solution is a water solution containing a hydrophilic polyamine monomer and an water phase additive, and the water phase additive comprises a surfactant and a proton receiving agent; the oil phase solution is a solution obtained by dissolving an acyl chloride monomer in an organic solvent. The nanofiltration membrane prepared by the preparation method is large in flux, stable in performance, high in desalting rate and relatively high in positive ion removal rate. In addition, the preparation method is simple and easy to control, relatively good in reproducibility, short in preparation time and low in preparation cost, and is favorable for realizing the production of the industrial high-flux positively charged nanofiltration membrane.

The invention discloses a preparation method of a polyamide reverse osmosis membrane containing an amphoteric carboxymethylcellulose sodium complex. The preparation method comprises the steps: firstly, preparing an amphoteric cationic polymer by a free radical polymerization method, then preparing an amphoteric carboxymethylcellulose sodium complex by an ionic crosslinking method, adding the amphoteric carboxymethylcellulose sodium complex into an aqueous phase monomer solution for preparing a polyamide membrane, and thus obtaining the polyamide reverse osmosis membrane containing the amphoteric carboxymethylcellulose sodium complex through an interfacial polymerization method. With utilization of good hydrophilicity, contamination resistance and a unique nanoparticle structure of the amphoteric carboxymethylcellulose sodium complex, the water permeation flux and contamination resistance of the membrane are greatly improved while the high salt interception rate of the polyamide membrane on an inorganic salt is kept. Under an operating pressure of 1.5 MPa at the temperature of 25 DEG C, the interception rate of the reverse osmosis membrane on NaCl is more than 97%, and the water permeation flux is more than 30 L.m<-2>.h<-1>. Therefore, the prepared polyamide reverse osmosis membrane containing the amphoteric carboxymethylcellulose sodium complex has high salt interception rate, water permeability and contamination resistance.

The invention provides a zero release device of high-salt high-ammonia-nitrogen waste water. The zero release device is mainly used for solving problems of conventional devices that discharge standards are not reached, and water resource recovery rate is low in high-salt high-ammonia-nitrogen waste water treatment. The zero release device is a membrane coupling device, and mainly comprises a membrane absorption unit, a nanofiltration unit, a forward osmosis unit, and a cooling crystallization unit; the membrane absorption unit is connected with the nanofiltration unit, the nanofiltration unit is connected with the forward osmosis unit, the forward osmosis unit is connected with the membrane absorption unit and the cooling crystallization unit, and a plurality of circulation loops are formed via connection of the units. The zero release device is easy for operation, and is easy for realization. The zero release device can be used for solving processing problems of high-salt high-ammonia-nitrogen waste water effectively, water recovery rate is high, and quality of obtained water is high. The zero release device is used for circulating condensation of high-salt high-ammonia-nitrogen waste water, almost no concentrated water is discharged, and recovery of water resource of high-salt high-ammonia-nitrogen waste water is realized as far as possible.

The invention provides an emission treatment system for high-salinity wastewater. The emission treatment system comprises a wastewater collection tank, a regulating treatment tank, a multi-medium filter, an electrodialysis treatment device, a coagulative precipitation unit, an evaporative crystallization unit, a nanofiltration unit and a reverse osmosis desalination device, wherein a water outletend of the wastewater collection tank is connected with the regulating treatment tank, an output end of the regulating treatment tank is connected with the multi-medium filter, an output end of the multi-medium filter is connected with the electrodialysis treatment device, a concentrated water outlet end of the electrodialysis treatment device is connected with the coagulative precipitation unit,a produced water outlet end of the electrodialysis treatment device is connected with the nanofiltration unit, a water outlet end of the nanofiltration unit is connected with the reverse osmosis desalination device, a water producing end of the reverse osmosis desalination device is connected with the electrodialysis treatment device, and a concentrated water outlet end of the reverse osmosis desalination device and a water outlet end of the coagulative precipitation unit are separately connected with the evaporative crystallization unit. The emission treatment system can be used for treatinghigh-concentration salt-bearing wastewater, and environmental pollution can be effectively reduced.

The invention discloses a capacitive microbial desalination battery device and method applied to chemical tail water treatment, and belongs to the technical field of water resource treatment. The battery device comprises an anode chamber, a desalting chamber and a cathode chamber which are separated by an anion exchange membrane and a cation exchange membrane respectively; the anode is made of a carbon material, and the cathode is a hollow carbon fiber-carbon film capacitor electrode formed by a hollow carbon fiber-carbon film capacitor layer, a titanium-based layer, a waterproof layer and a catalyst layer which are arranged in sequence; and the anode and the cathode are connected through an external circuit. The desalination method comprises the following steps: firstly, carrying out internal circulation on the chemical tail water in the anode chamber, connecting the anode chamber of the battery device with the desalination chamber in series after a specific retention time, enabling the water treated by the anode chamber to enter the desalination chamber, and carrying out circular treatment to remove salts and / or COD in the desalination chamber and the anode chamber. The device and the method can integrally and efficiently remove organic matters and salts in the chemical tail water and efficiently recover salts, are stable in structure and long in service life, and can be widely applied to treatment of various chemical tail waters.

The present invention provides a semipermeable composite membrane having high fouling resistance against membrane contaminants; and a method for producing the semipermeable composite membrane. This semipermeable composite membrane comprises a substrate, a porous support layer disposed on the substrate, and a separation functional layer disposed on the porous support layer, wherein the separation functional layer contains: from the porous support layer side, a first layer containing a crosslinked aromatic polyamide which is a polymer of a polyfunctional aromatic amine and a polyfunctional aromatic acid chloride; and an aliphatic polyamide which is present on the first layer and which is a polymer of a polyfunctional aliphatic carboxylic acid and a polyfunctional aliphatic amine.

The invention discloses an electro-adsorption desalting regeneration system and a regeneration process, relating to the field of water treatment and solving the problems that the regeneration of a secondary electro-adsorption module is more thorough and the adsorption efficiency is lower in the prior art. The regeneration system comprises a first electro-adsorption module and the second electro-adsorption module, and further comprises a control module, a first electric module and a second electric module, wherein the secondary electric module is used for enabling the secondary electro-adsorption module in a short-circuit state before the secondary electro-adsorption module finishes the regeneration, and enabling the secondary electro-adsorption module in an electrifying state after the secondary electro-adsorption module finishes the regeneration and before the first electro-adsorption module finishes the regeneration; the first electric module is used for enabling the first electro-adsorption module in the short-circuit state before the first electro-adsorption module finishes the regeneration; and the control module is used for controlling the short-circuit state and the electrifying state of the first electric module and the second electric module. According to the invention, the loads of the first electro-adsorption module and the second electro-adsorption module can be regulated to be more reasonable by fully utilizing the capability of the secondary electro-adsorption module so as to enable a running process of the module to be more compact.

The invention discloses a marine polysaccharide separation and concentration method which comprises the following specific steps: 1) pretreatment and impurity removal: carrying out pretreatment by adopting a silicon carbide microfiltration membrane (0.1 mu m), and removing suspended matters and colloidal impurities in brine by adopting cross-flow filtration; 2) separating and concentrating part ofmacromolecular soluble marine polysaccharide in the brine by adopting a silicon carbide ultrafiltration membrane (20nm) in the pretreatment permeate liquid in the first step, and concentrating; meanwhile, the permeate liquid is subjected to secondary separation; and (3) carrying out secondary separation and concentration on the permeate liquid generated in the step (2) by adopting an organic nanofiltration membrane (3000Da), and concentrating the trapped fluid while desalting to obtain the marine polysaccharide concentrated solution. According to the method, a multistage membrane separation desalination concentration system is adopted, and the marine polysaccharide concentrated solution with the concentration of being greater than 80% can be obtained; the salt ion removal rate of the concentrated solution is greater than 98%, and the generated waste liquid reaches the discharge standard and can be directly discharged; a silicon carbide film is adopted for pollution resistance; the treatment capacity is high; life cycle cost is low, energy consumption is low, and operation cost is low.

The invention relates to the field of L-homoserine extraction, in particular to a method for extracting L-homoserine from fermentation liquor. The method comprises the following steps of pretreatment of fermentation liquor, decoloration, electrodeionization, concentration and filtration to obtain L-homoserine. According to the method, the L-homoserine fermentation liquor is subjected to desalting treatment by adopting an electrodeionization technology for the first time, the desalting rate of the electrodeionization technology is increased by 10% compared with an electrodialysis technology, resin added in the electrodeionization technology does not need to be regenerated compared with an ion exchange technology, the use of a large amount of acid and alkali is reduced, and the water consumption can be saved by 70%.

The present invention provides a semipermeable membrane which has oxidant resistance even in the presence of a heavy metal, and which is still capable of achieving a salt removal performance equivalent to that of a semipermeable membrane having poor resistance to oxidants. A multilayer semipermeable membrane according to the present invention is provided with a semipermeable layer and a polymer layer that is formed on the semipermeable layer. The polymer layer contains a polymer that is formed by condensation of a hydrolyzable group of a compound (A) and by polymerization of the compound (A) and a compound (B). (A) A silicon compound having a silicon atom, a reactive group having an ethylenically unsaturated group that is directly bonded to the silicon atom, and a hydrolyzable group that is directly bonded to the silicon atom (B) A compound other than the compound (A), which has a hydrophilic group and an ethylenically unsaturated group.

The invention discloses crude oil anti-corrosion treatment equipment based on electronic control. The crude oil anti-corrosion treatment equipment comprises a desalting tank, wherein two high-voltage electric field mechanisms are arranged in the desalting tank; the two high-voltage electric field mechanisms are symmetrical relative to the central line of the desalting tank; a centrifugal mixing device is further arranged between the two high-voltage electric field mechanisms; the central axis of the centrifugal mixing device is overlapped with the central line of the desalting tank; two sewage outlets are formed in the bottom of the desalting tank; the sewage outlets correspond to the high-voltage electric field mechanisms one by one and are located just below the high-voltage electric field mechanisms; each high-voltage electric field mechanism comprises a plurality of positive electrode plates and negative electrode plates; the positive electrode plates and the negative electrode plates are alternately arrayed in parallel along the axial direction of the desalting tank and form a plurality of water removal channels at equal intervals; the water removal channels communicate with the sewage outlets; and the positive electrode plates and the negative electrode plates are further provided with a plurality of water suction holes and the water suction holes are uniformly distributed on the positive electrode plates and the negative electrode plates. By adopting the crude oil anti-corrosion treatment equipment based on the electronic control, the problem that the desalting effect of the single desalting tank is relatively poor is solved.

Provided is a composite semipermeable membrane having a high salt removal rate and a high water permeability. The composite semipermeable membrane comprises a substrate, a porous support layer formed on the substrate, and a separation functional layer formed on the porous support layer, the hydrophilic macromolecule concentration on the substrate-side surface of the porous support layer being higher than that on the separation functional layer-side surface.

The invention provides a low-energy-consumption large-flux reverse osmosis membrane and a preparation method and application thereof, the structure of the reverse osmosis membrane comprises a polysulfone porous support layer and a polyamide desalination layer formed on the support layer, and the interior or the surface of the polyamide desalination layer contains a mixture of hydroxyl sulfonate and alcohol amine. The reverse osmosis membrane provided by the invention has the characteristics of low energy consumption, high hydrophilicity, high water yield and the like, and can be widely appliedto the water treatment fields of industrial water supply, wastewater reuse and the like.

The invention discloses a multistage electrochemical water treatment system and method. The system comprises a first-stage electrochemical treatment module, a second-stage electrochemical treatment module, a water incoming tank, a first working pump, a filter, a first middle water tank, a second working pump, a first regeneration pump, a second regeneration pump, a concentrated water tank, a waterproducing tank and a second middle water tank, the second-stage electrochemical treatment module comprises a first electrosorption module and a second electrosorption module, and a salinity detectoris arranged at a water outlet of each of the first electrosorption module and the second electrosorption module. The system and method is high in treatment efficiency.

The invention relates to a method of treating saline industrial wastewater, comprising the steps of (1) pretreating, to be specific, delivering wastewater into a filter tank to remove suspended matters; (2) ultrafiltering, to be specific, delivering the wastewater of step (1) into an external pressure ultrafiltration system to perform ultrafiltering; (3) performing reverse osmosis, to be specific,delivering the wastewater of step (2) to a reverse osmosis system, and removing salt; (4), performing stripping, to be specific, delivering the produced water of reverse osmosis of step (3) into a stripping column, performing stripping, and adjusting pH to meet reuse needs. The method has the advantages that a multistage quartz sand filter tank can be used to effectively remove suspended matterswith blockage rarely occurring; the external pressure ultrafiltration system used herein has good applicability and is available for full-flow filtration; ultrafiltration membranes are of hollow fiber, having good strength, backflushing is more thorough, and the membranes can restore their performance well; BW30XFR-400 / 34i or PROC10 reverse osmosis membrane components can provide high salt removalrate, reaching 98% and above, and the comprehensive recovery rate of wastewater is high, reaching 85% and above.

The invention relates to a novel high-throughput positively charged nanofiltration membrane and a preparation method thereof. The novel high-flux positively charged nanofiltration membrane includes a porous support layer and a positively charged nanofiltration selective layer; the positively charged nanofiltration selective layer is formed by interfacial polymerization of an aqueous phase solution and an oil phase solution and then subjected to heat treatment The aqueous phase solution is an aqueous solution containing a hydrophilic polyamine monomer and an aqueous phase additive, and the aqueous phase additive includes a surfactant and a proton accepting agent; the oil phase solution is an acid chloride monomer dissolved in an organic solvent solution. The nanofiltration membrane prepared by the preparation method of the invention has large flux, stable performance, high salt removal rate and high removal rate for positive ions. In addition, the preparation method provided by the invention is simple and easy to control, has good reproducibility, short preparation time, and low preparation cost, which is beneficial to realize the production of industrialized high-throughput positively charged nanofiltration membranes.

The invention discloses a preparation method of a mesoporous carbon electrode. RF sol is used as a carbon source, a triblock copolymer F127 is used as a template agent, an F127-RF composite material is prepared through a solvent evaporation induced self-assembly soft template method under an alkaline condition, a highly ordered mesoporous carbon material with a high specific surface area is directly obtained through high-temperature carbonization treatment in an inert atmosphere, the mesoporous carbon material is uniformly mixed with a conductive agent and an adhesive according to a mass ratioof 8:1:1, a double-roller machine is utilized for rolling into a sheet, and high-temperature carbonization treatment is performed to directly obtain the highly ordered mesoporous carbon material with the high specific surface area. The mesoporous carbon material electrode synthesized according to the preparation method has a very remarkable electro-adsorption desalting effect on inorganic salt ions in high-salt-content wastewater, and mesoporous carbon has a relatively large specific surface area and pore volume, so that the adsorption capacity and the desalting rate of the ions are increased; the high-salt-content organic wastewater treatment equipment based on the mesoporous carbon electrode can realize electro-adsorption desalting of high-salt-content organic wastewater.

The invention discloses a preparation process of an epoxy modified reverse osmosis membrane, the reverse osmosis membrane and application of the reverse osmosis membrane. The preparation process comprises the following steps: 1) performing surface hydrophilic modification on a polyolefin porous support layer; 2) carrying out surface coating on the polyolefin porous supporting layer obtained in the step 1) by adopting epoxy resin to obtain a polyolefin substrate film; 3) contacting the polyolefin substrate membrane with a water-phase solution of polyfunctional aromatic polyamine, then contacting the polyolefin substrate membrane with an oil-phase solution of polyfunctional aromatic acyl chloride, and carrying out interfacial polymerization reaction to form a composite membrane containing polyamide; 4) exposing the composite membrane in a nitrous acid solution for post-treatment; and rinsing and drying to obtain the epoxy modified reverse osmosis membrane. The reverse osmosis membrane prepared by the method has the performance of high desalination rate on the basis of obtaining high flux through hydrophilic modification.

The invention discloses an electro-adsorption desalting regeneration system and a regeneration process, relating to the field of water treatment and solving the problems that the regeneration of a secondary electro-adsorption module is more thorough and the adsorption efficiency is lower in the prior art. The regeneration system comprises a first electro-adsorption module and the second electro-adsorption module, and further comprises a control module, a first electric module and a second electric module, wherein the secondary electric module is used for enabling the secondary electro-adsorption module in a short-circuit state before the secondary electro-adsorption module finishes the regeneration, and enabling the secondary electro-adsorption module in an electrifying state after the secondary electro-adsorption module finishes the regeneration and before the first electro-adsorption module finishes the regeneration; the first electric module is used for enabling the first electro-adsorption module in the short-circuit state before the first electro-adsorption module finishes the regeneration; and the control module is used for controlling the short-circuit state and the electrifying state of the first electric module and the second electric module. According to the invention, the loads of the first electro-adsorption module and the second electro-adsorption module can be regulated to be more reasonable by fully utilizing the capability of the secondary electro-adsorption module so as to enable a running process of the module to be more compact.

The invention provides an anti-oxidation and anti-biological pollution reverse osmosis membrane, a preparation method and application thereof. The reverse osmosis membrane comprises a polysulfone porous support layer and a polyamide desalination layer formed on the polysulfone porous support layer, and the polyamide desalination layer contains a blend of polyhydroxy flavone and small molecule aminocarboxylic acid inside or on the surface. Salt rejection rate and permeation flux evaluation experiments, oxidation resistance evaluation experiments and biofouling resistance evaluation experiments show that compared with common reverse osmosis membranes, the reverse osmosis membrane prepared by the present invention has better oxidation resistance and better biofouling resistance. powerful.

The invention provides a wastewater demineralization treatment system which comprises a wastewater collecting tank, a regulating treatment tank, a multi-medium filter, an MBR membrane treatment system, a security filter and a reverse osmosis demineralizer all arranged in sequence in a wastewater treatment direction. An outlet end of the wastewater collecting tank is connected with the regulating treatment tank; an outlet end of the regulating treatment tank is connected with the multi-medium filter; an outlet end of the multi-medium filter is connected with the MBR membrane treatment system; aconcentrated water outlet end of the MBR membrane treatment system is connected with the regulating treatment tank, allowing concentrated liquid to be returned to the regulating treatment tank afterbeing subjected to evaporative demineralization treatment; an effluent outlet end of the MBR membrane treatment system is connected with the security filter; an outlet end of the security filter is connected with the reverse osmosis desalination device; and a concentrated water outlet end of the reverse osmosis desalination device is connected with the MBR membrane treatment system. The wastewaterdemineralization treatment system is characterized by simple equipment operation and low operation cost, and characterized in that the effluent has a quality that can meet the requirements of different grades of water, and a high desalination rate that can meet the requirements of wastewater treatment.