42results about How to "Increase permeate flux" patented technology

The invention relates to a reverse osmosis membrane element which comprises a central pipe, a plurality of water inlet partition nets, a plurality of reverse osmosis membranes and multiple pieces of pure water diversion cloth. The water inlet partition nets, the reverse osmosis membranes and the multiple pieces of pure water diversion cloth are wound around the central pipe. The multiple pieces of pure water diversion cloth are communicated with an inner cavity of the central pipe. A water inlet channel and a water producing channel are formed between every two adjacent reverse osmosis membranes and are arranged in a spaced mode. The water inlet partition nets are located in the water inlet channels. The multiple pieces of pure water diversion cloth are located in the water producing channels. The water inlet partition nets and/or the multiple pieces of pure water diversion cloth are each of a multi-supporting-point structure. The water inlet partition nets and/or the multiple pieces of pure water diversion cloth are each of the multi-supporting-point structure, and therefore load bearing contact points of the reverse osmosis membrane element can be effectively increased, the stress tolerance of the reverse osmosis membrane element is improved, the area of the water inlet channels or the water producing channels is enlarged, and the water producing flow of the reverse osmosis membrane element can be effectively improved.

The invention discloses a method for treating reverse osmosis concentrate. The method comprises the step of sequentially carrying out crystallization and membrane distillation on the reverse osmosis concentrate. The method is carried out at a normal pressure and a low temperature, and has the characteristics of simplicity in operation and convenience in management. The concentration of scaling ions in the reverse osmosis concentrate is reduced through induced crystallization softening, the membrane distillation concentration process can be carried out under the condition of lower membrane pollution, high-quality industrial pure water is obtained when the reverse osmosis concentrate is greatly reduced, and can be recycled in industrial production, thus the problem of treating the reverse osmosis concentrate is successfully solved, and a wide application prospect is achieved.

The invention discloses a chemical cleaning method for nanofiltration or reverse osmosis membranes. The chemical cleaning method includes the following steps: (1) pickling the nanofiltration or reverse osmosis membranes by acidic solutions; (2) cleaning the nanofiltration or reverse osmosis membranes by product water after pickling; (3) performing alkali washing on the nanofiltration or reverse osmosis membranes by alkaline cleaning solutions; (4) cleaning the nanofiltration or reverse osmosis membranes by the product water after alkali washing to complete cleaning of the nanofiltration or reverse osmosis membranes. The chemical cleaning method has the advantages that various pollutants on the nanofiltration or reverse osmosis membranes can be efficiently removed, the operating pressure ofthe nanofiltration or reverse osmosis membranes can be reduced, the yield of clear liquid of the nanofiltration or reverse osmosis membranes can be increased, the service life of the nanofiltration or reverse osmosis membranes can be prolonged, the power consumption of the clear liquid can be lowered, and stable operation of landfill leachate treatment plants can be guaranteed; the chemical cleaning method has the advantages of simple process, convenience in operation, low cleaning cost, high cleaning efficiency, good cleaning effect, high application value, good application prospect and thelike.

The invention discloses a polyhydroxy POSS-modified reverse osmosis composite membrane and a preparation method thereof. The preparation method comprises the following steps: providing an aqueous solution of polyamine containing polyhydroxy-functionalized POSS nanoparticles; infiltrating a base membrane in the aqueous solution of polyamine; infiltrating in an organic solution of polyacyl chlorideafter taking out; and performing interfacial polymerization on the polyhydroxy-functionalized POSS nanoparticles, polyamine and polyacyl chloride to obtain the polyhydroxy POSS-modified reverse osmosis composite membrane. The polyhydroxy POSS-modified reverse osmosis composite membrane prepared by the method of the invention has high reflux and desalinization rate, also has greatly improved pollution resistance and chlorine resistance, is simple in preparation process and convenient for large-scale production, can be widely applied to seawater desalination and other fields.

The invention discloses a preparation method of a polyvinylidene fluoride hollow fiber micropore filter membrane. The preparation method includes the steps of: preparing a film casting liquid; preparing a core liquid; preparing an outer solidifying liquid; performing spinning; performing rinsing replacement; and performing thermal treatment. The method is used for preparing the PVDF hollow fiber micropore filter membrane through combination of thermally induced phase separation and solution phase conversion; compared with the solution phase conversion method, finger-like holes are eliminated, and the microstructure of the membrane is more reasonable; and compared with the thermally induced phase separation method, the method simplifies operations, is free of solvent extraction and reduces cost; in the film casting liquid, inorganic additives, such as nano glass powder or nano silicon carbide, are added, so that strength of membrane filaments is enhanced, and especially, pressure resistance and wear resistance of the membrane filaments are improved. The method can be used for preparing internal-pressure or external-pressure membrane filaments having a skin layer. The microstructure under the skin layer is also in a network structure or a particle stacking structure. The membrane filaments have good separation performance and high flux.

The invention discloses a membrane biological reaction system, aiming at providing a membrane biological reaction system which is compact in structure, small in occupied space, capable of reducing the sludge concentration of a submersible membrane processing unit, and prolonging the service time of a membrane assembly. A sludge and water separation device is arranged between an aerobic pool of the biological processing unit and the immersed membrane processing unit and consists of a pool body, a first guide wall, a second guide wall, a third guide wall and an aerating device, the aerating device is arranged at one side of the bottom of the pool body, the first guide wall is outward obliquely arranged in a manner of forming an angle of 110-120 degrees with the horizontal direction, the lower end of the third guide wall corresponds to the lower end of the first guide wall at a projection point at the bottom of the pool body, the third guide wall and the bottom of the pool body are outward inclined by an angle of 60-75 degrees, and the second guide wall is perpendicular to the bottom of the pool body and positioned between the first guide wall and the third guide wall. The system does not require entire separation of mixed liquid, and is short in residence time, compact in structure and small in occupied space.

The invention discloses a vehicle-mounted type sewage recycling system. The vehicle-mounted type sewage recycling system comprises a sewage tank, wherein a sewage collecting tube is arranged in the sewage tank; a sewage discharge valve is arranged at the bottom of the sewage tank; a vertical type filter system is fixed in the sewage tank; a spray rod with a high-pressure spray head is arranged at the inner part of the vertical type filter system and is connected with an external high-pressure water tube; a water outlet of the vertical type filter system is connected with a water inlet of a hollow fiber membrane assembly system through a sewage tube; a water pump system is arranged on the sewage tube; a water outlet of the hollow fiber membrane assembly is connected with two branches, one branch is connected with a regenerated clear water pipeline, and the other branch is connected with a concentrated water reflux pipeline; the concentrated water reflux pipeline is accessed into the sewage tank. According to the vehicle-mounted type sewage recycling system, a physical filter mode is adopted to effectively prevent secondary pollution in a sewage recycling process; and the amount and the quality of the circulated regenerated water are ensured because of effective lockage prevention of a classified filtering mode.

The invention provides an integrated refractory wastewater treating and reusing device and a sewage treatment method. With the device provided by the invention, the interior of an advanced oxidation reaction unit is provided with baffle plates which separate the advanced oxidation reaction unit into a plurality of reaction sections; a membrane separation component is arranged inside the last reaction section along the direction of water flow; the advanced oxidation reaction unit respectively communicates with a water inlet unit and an oxidant supply unit; and a water outlet unit communicates with the membrane separation component. In the advanced oxidation reaction unit, sewage, an oxidant and a powder catalyst undergo a contact reaction, so pollutants in the sewage are degraded, and a water phase is discharged after filtered through the membrane separation component. The device provided by the invention combines advantages of an advanced oxidation method and a membrane separation method, solves the problem of difficult separation of the powder catalyst in the advanced oxidation method by utilizing membrane separation, can well control pollution of a separation membrane at the same time, and has advantages like small occupied land area, short reaction time, low investment cost, and capability of synchronously realizing up-to-standard treating and reusing.

The invention relates to an anti-pollution composite membrane, and a making method and an oil-water emulsion separation method thereof, and discloses an anti-pollution composite membrane used for different charged oil-water emulsions and having corresponding charging performance, and a making method and an oil-water emulsion separation method thereof. The anti-pollution composite membrane comprises a base membrane and an effective separation layer coating the internal surface of the base membrane, the effective separation layer is a sulfonated polymer coating used for carrying out screening and charge repulsion on a negatively-charged oil-water emulsion or an aminated polymer coating used for carrying out screening and charge repulsion on a positively-charged oil-water emulsion, and the composite membrane has negatively or positively charging performance after undergoing treatment and adsorption in a surfactant solution containing anions or cations. The composite membrane can remove different charged emulsified oil and has very high anti-pollution performance, so the emulsified oil in water is effectively intercepted, the quality of outlet water is improved, and the treatment cost is low.

The invention discloses a preparation method of a reinforced polyvinylidene fluoride hollow fiber micropore filter membrane. The preparation method includes the steps of: preparing a film casting liquid; preparing a support body; preparing an outer solidifying liquid; performing spinning; performing rinsing replacement; and performing thermal treatment. The method is used for preparing the PVDF hollow fiber micropore filter membrane through combination of thermally induced phase separation and solution phase conversion; compared with the solution phase conversion method, finger-like holes are eliminated, and the microstructure of the membrane is more reasonable; and compared with the thermally induced phase separation method, the method simplifies operations, is free of solvent extraction and reduces cost; in the film casting liquid, inorganic additives, such as nano glass powder or nano silicon carbide, are added, so that strength of membrane filaments is enhanced, and especially, pressure resistance and wear resistance of the membrane filaments are improved.

The invention discloses a plate-type membrane distillation water treatment device, and a solar energy plate-type membrane distillation desalination system. The plate-type membrane distillation water treatment device comprises a first feed inlet end plate, a first hydrophobic millipore membrane, a first membrane support net, a vacuum cooling plate, a second hydrophobic millipore membrane, a secondmembrane support net, and a second feed inlet end plate which are connected successively from bottom to top; a cooling runner is arranged in the vacuum cooling plate; the bottom end of the vacuum cooling plate is provided with a cooling water inlet hole communicated with the cooling water runner, and the top end is provided with a cooling water outlet hole communicated with the cooling water runner; the bottom end of the vacuum cooling plate is provided with a first gas suction hole communicated with a first square vacuum channel, and the lower wall surface of the vacuum cooling plate is provided with a second gas suction hole communicated with a second square vacuum channel. According to the plate-type membrane distillation water treatment device, an inlet material is taken as a cooling liquid for pre-heating, the condensation latent heat of steam is recycled, and system energy utilization rate is increased; the first membrane support net is adopted, so that damage is not easily caused in membrane distillation process, and device endurance and stability are improved.

The invention belongs to the field of water processing equipment, and discloses an MBR flat membrane element, which comprises a support plate, guide cloth, and filter membranes. The guide cloth is welded on two lateral surfaces of the support plate. The filter membranes are arranged on the external surfaces of the guide cloth and welded on the external frame of the support plate. Two lateral surfaces of the support plate are provided with guide grooves. The guide grooves are vertically arranged in the inner surfaces of the guide cloth; the direction of the guide grooves is the same as the flowing direction of fluids; and the guide grooves are staggered from each other. By arranging guide grooves in the support plates, the resistance during the filtering process is reduced, the water flux is increased, and the operation cost is reduced.

The invention provides a ship cooling seawater desalination system and method. The system comprises a filtering part, a heater, a pressurizing conveying part, a distillation separator, a condenser and a vacuumizer, the filtering part is connected with a cooling water outlet of a cooling system and used for conducting filtering pretreatment on cooling seawater obtained after heat exchange to obtain filtered cooling seawater, the heater heats the filtered cooling seawater to obtain seawater to be desalinated, the pressurizing conveying part pressurizes the seawater to be desalinated and conveys the seawater according to a preset seawater flow, the distillation separator performs vacuum distillation separation treatment on the pressurized seawater to be desalinated to obtain concentrated seawater and water vapor, the condenser performs vacuum condensation treatment on the water vapor to obtain fresh water, and the vacuumizer is used for vacuumizing a steam cavity and a steam condensation cavity.

The invention discloses a membrane component tank with a dielectrophoresis pre-filtration structure. The membrane component tank comprises a membrane tank and a pre-filtration cavity, the pre-filtration cavity is positioned at the bottom of the membrane tank and connected with the membrane tank through a water inlet valve, a dielectrophoresis filtration structure is mounted in the pre-filtration cavity and comprises a metal stretching net electrode plate and a metal porous membrane structure electrode plate which are parallelly arranged up and down, connected with different output ends of an alternating current power supply and mutually insulated, and a membrane component device is arranged in the membrane tank and provided with a water outlet valve. The pre-filtration cavity with the dielectrophoresis filtration structure at the bottom of the membrane tank realizes pre-filtration, cleaner pre-filtration produced water is provided for the membrane component device in the membrane tank,the impact resistance of the membrane component device is improved, produced water flux is increased, the cleaning time and the service life of the membrane component device are prolonged, and the membrane component tank can be used for aerobic, anaerobic or direct filtration processes.

The invention discloses an enhanced nitrification process based on coupled demolding, and belongs to the technical field of sewage treatment. In the sewage nitrification process, under a condition ofkeeping a certain content of dissolved oxygen in a system, extrusion treatments are carried out on an elastic filler so as to generate different deformation degrees, in each extrusion treatment, deepextrusion and shallow extrusion are coupled; deep extrusion is carried out when the system load decreases, the effluent quality is close to an index value, or the system resistance exceeds a designedinflow water distribution pressure; and shallow extrusion is carried out when the system load is stable. Through the combination of deep extrusion and shallow extrusion, on one hand, demolding and redistribution of a bio-membrane filler can be realized, the mass transfer efficiency is improved, on the other hand, dissolved oxygen inside and outside the bio-membrane filler can be distributed more uniformly, through the synergistic effect of deep extrusion and shallow extrusion, the nitrification reaction is enhanced, the sewage treatment efficiency is improved, and the effluent quality is recovered.

The invention provides a powder active carbon filter and process for deep treatment of sewage. The powder active carbon filter comprises a carbon discharging pump, a stirrer, a recycled water tank, apowder active carbon filter body, a water production tank and an air compressor, wherein the carbon discharging pump is communicated with the recycled water tank by virtue of a pipeline, the recycledwater tank is connected with the powder active carbon filter body by virtue of a pipeline, a water inlet pump, a circulating pump, a water inlet valve, a circulation water inlet valve, an outer circulation valve, an inner circulation valve and a reflux valve, the powder active carbon filter body is communicated with the water production tank by virtue of a pipeline, a backwash pump, a water production valve and a backwash water inlet valve, and the air compressor is communicated with the powder active carbon filter body by virtue of a pipeline and a backwash gas inlet valve. By adopting the deep treatment technology of powder active carbon filtration, the soluble COD in the sewage can be effectively removed. The powder active carbon filter has the advantages of simple system operation, small land occupation area, good water outlet quality, low operation cost and high automation degree and the like.

The invention provides an improved hollow fiber nanofiltration membrane assembly, which comprises a membrane shell and a flow guide type filter membrane element arranged in the membrane shell, whereinthe flow guide type filter membrane element comprises membrane filament units arranged in a liquid channel and used for filtering, flow guide plates for improving fluid distribution, separation chambers and fixing layers arranged at the two ends of the membrane shell, poured with a resin and used for fixing the membrane filament units and the flow guide plates. According to the invention, by improving water flow distribution in the assembly, separation chambers enable water flow to be forcibly separated in the membrane element at the water inlet sside and the water outlet side of the membraneaseembly to reduce the obstruction of the membrane element to the water flow, reduce the membrane element outlet pressure drop, avoid the damage to the membrane element due to water flow impact, andeffectively improve the water flow impact resistance of the nanofiltration membrane assembly on the premise of ensuring that the hardware of the flow guide type hollow fiber nanofiltration membrane system is not changed, so that the operation efficiency of the hollow fiber nanofiltration membrane is improved, wherein the rejection rate is improved, the water production flux is improved, the pressure loss of the membrane assembly is reduced, and the service life of the membrane assembly is prolonged.

The invention discloses an advanced industrial sewage treatment system with low environmental influence. The system comprises a filtering mechanism and an electrolysis mechanism arranged near the filtering mechanism, wherein the filtering mechanism comprises a filter screen and a filter membrane, the filter screen is made of a metal material, the filter screen is located at an industrial sewage inlet, an adjusting box is arranged near the filter screen, a dosing box is arranged in the adjusting box, the adjusting box is connected with a filter screen and an electrolysis mechanism, the electrolysis mechanism comprises a pulse power supply and an electrode plate connected with the pulse power supply, the electrode plate is a multilateral rhombic pore plate, the electrolysis mechanism is located between the filter screen and the filter membrane, a transfer box is further arranged on the side, close to the filter membrane, of the electrolysis mechanism, a backflow mechanism and a reverse osmosis mechanism are arranged near the filter membrane, and the backflow mechanism is connected with the filter membrane and the adjusting box. According to the invention, 95% or more of the water in raw waste liquid is separated, the rest of the pollutants in a solid state form are separated, each pollution index of treated wastewater is significantly degraded, and full-automatic unattended automation can be achieved.

The invention discloses an industrial wastewater treatment process convenient for pollutant degradation. The industrial wastewater treatment process is characterized by comprising the following steps: S1, coarsely filtering wastewater, and removing large-diameter particles in the industrial wastewater to obtain a coarse filtrate A; S2, adding an acid-base balancing agent into the coarse filtrate A to obtain a coarse filtrate B with a pH value in a range of 7-9; S3, performing electric flocculation treatment on the coarse filtrate B to obtain a pollutant C and wastewater D; S4, performing electro-catalysis on a mixed solution of the pollutant C and the wastewater D based on a special polar plate to obtain electrolytic wastewater E; and S5, conducting solid-liquid separation on the electrolytic wastewater E through an ultrafiltration membrane so as to reach a discharge standard. According to the invention, pollutants can be degraded to the maximum extent after full-automatic treatment of wastewater, the influence of fluctuation of raw water pollution components on a treated water sample is small, treatment cost is reduced, and meanwhile, water consumed by enterprise production is saved.