23 results about "Reverse osmosis" patented technology

RO membranes using chlorinated water as a feed stream maybe protected from damage by the chlorine with a protective layer including reactive nitrogen which forms chloromines on the surface of the membrane that reduce chlorine penetration. This protective layer also provides substantial anti-fouling capabilities, whether used with a chlorinated or unchlorinated feed stream because the chloramines are anti-bacterial. Although chlorine is lost in use, the anti-fouling layer or coating can be recharged with additional chlorine without damaging the discrimination layer. The anti-fouling layer or coating may be advantageously used with Thin film composite, TFC, membranes for use in forward and reverse osmosis may include nanoparticles, monohydrolyzed and/or di-hydrolyzed TMC, and/or alkaline earth alkaline metal complexes or other additives.

The invention provides a combined treatment method of leachate and excrement wastewater due to high contents of organic matters and phosphor but insufficient nitrogen in the excrement wastewater and high contents of organic matters and nitrogen but insufficient phosphor in the leachate. Therefore, nitrogen and phosphor in the excrement wastewater and leachate are complemented with each other, nutrient elements required by microbes are balanced, and a biological treatment method is suitable for treatment. According to the method, biological treatment, membrane separation treatment and reverse osmosis deep treatment are adopted, so that the treated discharge water is in accordance with the first-grade requirement of the GB8978-1996 Comprehensive Sewage Discharge Standard of People's Republic of China.

The invention relates to a combined process for standard-meeting discharge of garbage percolate treatment, which takes a garbage percolate stock solution or a garbage percolate pretreated by an anaerobic regulating reservoir as a treatment object, and comprises the following steps: step one, the garbage percolate to be treated is treated by a multiple microporous carrier reaction bed film-formed with microorganisms to decompose organic substances in the garbage percolate; step two, the oxidation flocculation treatment is performed; and step three, the multistage filtration treatment is performed, the treatment fluid with CODcr less than 100mg/L is drained, and the multistage filtration comprises micro-filtration, fine filtration and reverse osmosis orderly. The process has low treatment cost, simple process, convenient equipment maintenance, strong anti-load capability, strong internal digestion power of metabolites, and small amount of sludge discharge, is suitable for garbage percolates with different concentrations and different discharge requirements, flexibly adjusts a program of process combination according to percolates, combines multiple high-efficiency single technologies, adopts different combination schemes, and ensures that the advantages of the single technology are better played.

The invention discloses a washing method for a reverse osmosis membrane component and a washing system. The washing method for the reverse osmosis membrane component comprises the following steps: a pre-washing step: pre-washing the reverse osmosis membrane component by using washing fluid; and a micro-bubble washing step: continuously feeding the washing fluid to the reverse osmosis membrane component, and feeding micro-bubbles to the reverse osmosis membrane component, thereby enabling a filter cake layer on the surface of the reverse osmosis membrane component to depart from the reverse osmosis membrane component. The method is high in washing efficiency, and long in washing period. A re-pollution speed of the reverse osmosis membrane component is apparently slowed down, and a rejectionrate of salt and a permeant flux are apparently improved.

The invention discloses a zero-discharge treatment method and system for mine strong brine. The zero-discharge treatment method for the mine strong brine comprises the following steps: S1, carrying out primary filtration and impurity removal treatment on the mine strong brine, and then carrying out primary reverse osmosis concentration; S2, performing chemical softening treatment on the primary reverse osmosis concentrated water; S3, carrying out secondary filtration and impurity removal treatment on the softened produced water, and then carrying out secondary reverse osmosis concentration; S4, carrying out microfiltration treatment on the secondary reverse osmosis concentrated water; S5, carrying out evaporation and concentration treatment on the microfiltration produced water; S6, performing sodium sulfate crystallization treatment on the concentrated solution, and sequentially thickening, centrifuging and drying the nitre slurry to obtain sodium sulfate; and S7, carrying out sodium chloride crystallization treatment on the saturated mother liquor subjected to sodium sulfate crystallization treatment in the step S6, and sequentially thickening, centrifuging and drying salt slurry to obtain sodium chloride. According to the invention, the water recovery rate of the production wastewater is greatly improved, the environment is protected, the crystalline salt is recycled, and the zero emission target of the mine strong brine is really achieved.

The invention provides an extraction method of astaxanthin. The extraction method comprises following steps: shrimp shell processed via acid refining is subjected to filtering impurity removing, pH value of an obtained filtrate is adjusted to 5, and an electrodialyser desalination water tank is used for seven-grade ion exchange membrane electrodialyser desalination; pH value of a crude shrimp shell immersed water obtained via electrodialysis is adjusted to 7, and the crude shrimp shell immersed water is pumped into a constant pressure filtering machine filled with diatomite for filtering impurity removing; after impurity removing, shrimp shell is pumped into a reverse osmosis device composed of 20 sets of reverse osmosis composite membrane for concentration; and an astaxanthin product is obtained via decoloration, evaporation and concentration, crystallization, and drying. Compared with the prior art, the extraction method comprises following advantages: operation is convenient, industrialized production is easy to realize, filter aid constant pressure filtering of the shrimp shell obtained via electrodialysis desalination is carried out so as to remove a large amount of impurities, the concentration of astaxanthin in the original shrimp shell can be increased by three times or higher via reverse osmosis membrane concentration, and product yield and purity are high.

The invention discloses a waste water valve, and a reverse osmosis water purifier. The waste water valve comprises a water inlet end and two water outlet ends; the water inlet end is connected with awaste water outlet end of the reverse osmosis water purifier; one of the water outlet ends is connected with a raw water inlet end of the reverse osmosis water purifier; and the other water outlet endis designed to be unoccupied. The structure of the reverse osmosis water purifier is simplified, installation is convenient, and space utilization rate is high.

The invention relates to the field of wastewater treatment, and discloses a method for improving performance of a reverse osmosis membrane and a method for treating wastewater. The method for improving the performance of the reverse osmosis membrane includes: enabling acid or alkali solution to contact with the reverse osmosis membrane, wherein the concentration of hydrogen ions in the acid solution is 0.01-0.05mol/L, and the concentration of hydroxide ions in the alkali solution is 0.03-0.125 mol/L. The method for treating the wastewater includes: treating the reverse osmosis membrane according to the above method, and then using the treated reverse osmosis membrane for wastewater treatment; or includes: modifying the reverse osmosis membrane in the process of wastewater treatment, wherein a modifying treatment method includes: adjusting the pH (potential of hydrogen) value of the to-be-treated wastewater, and enabling the pH value-adjusted wastewater to contact with the reverse osmosis membrane. Through the technical schemes, the method for improving the performance of the reverse osmosis membrane and the method for treating the wastewater have the advantages that the performance(especially concentration limit or concentration multiple) of the reverse osmosis membrane is improved effectively, and high concentration multiple of the reverse osmosis membrane can be maintained for a long time.

The invention discloses a reverse osmosis scale inhibition dynamic evaluation instrument, which comprises a pump, a PP cotton filter, a filter, an ultra-filtration device, a first pressure gauge, a first flow meter, a reverse osmosis device, a second pressure gauge, a second flow meter, a third flow meter and an external water groove, wherein the pump is sequentially connected to the PP cotton filter, the filter, the ultra-filtration device and the first flow meter through a water inlet pipe, the first pressure gauge and a valve are arranged between the ultra-filtration device and the first flow meter, the first flow meter is connected to the reverse osmosis device through the water inlet pipe, the output end of the reverse osmosis device is respectively connected to one end of a production water pipe and one end of a concentrated water pipe, the second pressure gauge is arranged on the concentrated water pipe, and the other ends of the production water pipe and the concentrated waterpipe are provided with the external water groove. According to the present invention, the scale inhibition dynamic evaluation instrument fills the laboratory-level evaluation blank, can accurately simulate the on-site process conditions, has important guiding significance in the evaluation of the performance of scale inhibitor products, has high accuracy and small occupation area, and can save a lot of water resources.

The invention discloses a manufacturing method for an integrated water purifier capable of achieving grading pollution discharge. The water purifier comprises a mechanical filter device and a nanofiltration membrane filtering device, and further comprises a reverse osmosis (RO) membrane filtering device, wherein the junction of a barrel body and an upper sealing head of a closed container is provided with bolts and nuts, an upper annular baffle is arranged in the closed container and provided with three circular water outlet clamping pipes, three water inlet clamping pipes are arranged in the bottom of the closed container, RO membrane filter element membrane shells are arranged on the left side and the right side and in the middle of the closed container, RO membranes are arranged in the membrane shells, first silicone sealing rings for raw water are arranged at water inlets of the RO membranes, the middles of the membrane shells are provided with water generating pipes, one ends of the water generating pipes are provided with second silicone sealing rings, the peripheries of the water generating pipes are provided with concentrated water channels, the bottom of the closed container is provided with a water inlet, and the top of the closed container is provided with a water outlet; a water outlet of the nanofiltration membrane filtering device is communicated with the water inlet of the reverse osmosis (RO) membrane filtering device. The water purifier is economical and practical.

The invention belongs to the technical field of environmental protection, and particularly relates to a PVC mother liquor recycling treatment device and process. The device comprises a PVC mother liquor pipeline, the PVC mother liquor pipeline is sequentially connected with an advanced oxidation reactor, a buffer sedimentation tank, a ceramic membrane filter, a heat exchanger and a reverse osmosis desalting device, a concentrated water outlet of the reverse osmosis desalting device is connected with the ceramic membrane filter through a backwashing pump, and the ceramic membrane filter and the advanced oxidation reactor are both connected with an ozone generator; the PVC mother liquor directly enters a Fenton + ozone advanced oxidation reactor without cooling, Fenton-ozone advanced oxidation is carried out, then a ceramic membrane filter is adopted for ceramic membrane filtration, after heat exchange, filtered water is directly subjected to reverse osmosis desalting treatment, produced water is recycled, and concentrated water is used for backwashing the ceramic membrane filter. According to the method, high-quality recovery of the PVC mother liquor can be realized, the COD discharge amount and the water taking amount of a factory are reduced to a great extent, and the benefits of PVC production enterprises can be effectively increased.

The invention belongs to the field of water environment treatment, and particularly relates to a preparation method and application of a hydroxyethyl cellulose modified scale inhibitor capable of effectively inhibiting silicon dioxide scale bodies in a green and efficient manner. The green modified cellulose scale inhibitor is prepared by taking hydroxyethyl cellulose as a raw material, ammonium persulfate as an initiator and N-(3-dimethylaminopropyl) methacrylamide as a grafting monomer through a grafting reaction. According to the method, a grafting chain containing an amide group and a tertiary amine group can be introduced to a cellulose molecular chain, so that scale forming substances can be effectively dispersed, and the efficient environment-friendly scale inhibitor is obtained. The scale inhibitor prepared by the invention can effectively inhibit the generation of scale bodies and prevent the size of the scale bodies from being increased; when the scale inhibitor is applied to a reverse osmosis system, the reduction of membrane flux is effectively relieved, and the membrane has a good application prospect in controlling silicon dioxide scaling on the surface of the reverse osmosis membrane.

The present invention relates to a feed spacer and a reverse osmosis filter module including the same and, more specifically, to: a feed spacer having multiple functions since strands are formed in one feed spacer at different angles along the flow direction of raw water such that a differential pressure reduction region and a recovery increase region are separated; and a reverse osmosis filter module including the same.

The invention discloses a panax notoginseng reverse osmosis protein gene PnOLP1. The gene PnOLP1 has a nucleotide sequence shown as SEQ ID NO:1, and encodes protein having an amino acid sequence shownas SEQ ID NO:2. It is verified by functional genomics related technical research that the gene PnOLP1 has the function of improving the antifungal property of plants; after the antifungal gene PnOLP1is constructed onto a plant expression vector and transferred into nicotiana tabacum for overexpression, the transgenic nicotiana tabacum plant has quite high in-vitro antifungal activity as a result, and the experimental result shows that the transgenic nicotiana tabacum overexpressing PnOLP1 has a significant inhibiting effect on the growth of four fungi including colletotrichum gloeosporioides, fusarium solani, fusarium oxysporum and nigrospora oryzae.

The invention discloses a waste water recycling method. The method comprises the following steps: conveying waste water into a waste water pool, and conveying the waste water in the waste water pool into an activated carbon tank through a lifting pump; filtering suspended solids and colloidal substances in the wastewater through activated carbon; feeding the wastewater with the adjusted PH value into an ultrafiltration device, and then removing colloidal substances in the wastewater; conveying the treated wastewater into a reverse osmosis RO membrane system, wherein the reverse osmosis RO membrane system is used for concentrating and separating concentrated water and fresh water according to the ratio of 1:4; and directly applying the concentrated and separated fresh water to a water point for production, adjusting the pH value of the concentrated and separated concentrated water to 6-7, feeding the concentrated water into a CME electrolysis device through a pump for electrolytic oxidation, treating the concentrated water, and conveying the treated concentrated water into a wastewater collection tank. The invention provides a wastewater recycling method which is simple, convenient to operate, stable and reliable in performance and long in service life, can be applied to pretreated wastewater in all walks of life, and can be used for effectively recycling the wastewater.

The invention discloses a dye wastewater discharge purification device which comprises a ceramic membrane filter and a treatment box, the top of the ceramic membrane filter is communicated with a liquid inlet pipe, the bottom of one side, close to the treatment box, of the ceramic membrane filter is communicated with a first permeate liquid outlet pipe, and the bottom of the first permeate liquid outlet pipe is communicated with a second permeate liquid outlet pipe; an adsorption layer is arranged in the first treatment cavity, a reverse osmosis membrane is arranged in the second treatment cavity, a central water collecting pipe is arranged in the reverse osmosis membrane, the bottom of the second treatment cavity is communicated with a pure water outlet, and one end of the bottom of the second treatment cavity is communicated with a concentrated water outlet. Through the arrangement of the ceramic membrane filter, the treatment box, the adsorption layer, the draw-off pump and the reverse osmosis membrane, permeate obtained after monochromatic dye wastewater membrane concentration treatment is subjected to oil and color removal treatment, then the permeate is introduced into the reverse osmosis membrane to obtain pure water and concentrated water, the produced pure water can be directly used for a dye purification system, and the production cost is reduced. And after the concentrated water enters a sewage system, the treatment difficulty is very low.

The invention discloses a plate heat exchanger for triple-effect heat energy reusing, and belongs to the technical field of environmental protection machines. The plate heat exchanger structurally comprises heat-exchanging plate sheets, a sealing pad, a sealing ring, a heat-exchanging water inlet, a heat-exchanging water outlet, a heat medium inlet, a heat medium outlet, top plates, two intermediate plates and a screw rod; and the top plates are arranged at the two ends, the two intermediate plates are arranged in the middle, heat-exchanging zones are divided into three sets, the first set ofheat-exchanging zone is arranged on the water inlet side, the second set of heat-exchanging zone is arranged between the two intermediate plates in the middle, and the third set of heat-exchanging zone is arranged on the water outlet side. The plate heat exchanger for triple-effect heat energy reusing is suitable for being used at the water inlet front end of an external membrane bioreactor (MBR)or a nanofiltration or reverse osmosis membrane in sewage treatment, membrane effluent and membrane recirculation water serve as a first-stage heat-exchanging medium and a second-stage heat-exchangingmedium to conduct heat energy in the membrane effluent and the membrane recirculation water into inlet water of the membrane, thus the heat energy is recycled, and water or steam heated by a boiler serves as a third-stage heat-exchanging medium so as to reach the optimum temperature of the inlet water of the membrane.

The invention relates to a portable medical rolling pump for testing the performance of a hemodialysis and fluid infusion pipeline. A central control module of the medical rolling pump is respectivelyconnected with a phi 6 peristaltic pump module, a phi 8 peristaltic pump module, a display screen module, a physical button module and a power supply module. Reverse osmosis water or distilled wateris used for simulating human blood, the flow speed, starting and stopping functions of a hemodialysis pipeline are manually set through a solid button, and the pump pipe characteristics of a human body in a dialysis state are simulated. The medical rolling pump is relatively small in size, light in weight, simple in structure, low in manufacturing cost and capable of being conveniently carried tovarious places or various workshops to test the characteristics of pump pipes with different batch numbers.