105results about How to "Reduced fouling tendency" patented technology

The invention provides asymmetric membranes composed of a microporous substrate whose pores contain a crosslinked gel, the density of the crosslinked gel being greater at or adjacent to one major surface of the membrane than the density at the other major surface. The membranes are useful for separating matter from liquids and display good flux and good rejection at low pressure.

The invention relates to a desulfurization waste water recycling and zero discharge system and method. The desulfurization waste water recycling and zero discharge system comprises a desulfurization tower, a filter and a nanofiltration device which are sequentially connected, wherein a scale inhibitor dosing device is arranged at the inlet of the nanofiltration device, the concentrated water outlet of the nanofiltration device is connected with the desulfurization tower, the fresh water outlet of the nanofiltration device is connected with a saline water concentrating device, the fresh water outlet of the saline water concentrating device is connected with a fresh water tank, the concentrated water outlet of the salt water concentrating device is connected with a crystallizer, and the condensed water outlet of the crystallizer is connected with the fresh water tank; a drying encapsulating machine is arranged at the solid outlet of the crystallizer. The desulfurization waste water recycling and zero discharge system has the advantages that desulfurization waste water discharged from the desulfurization tower is filtered and then is fed into the nanofiltration device, nanofiltration concentrated water returns to the desulfurization tower, nanofiltration fresh water is treated by virtue of the salt water concentrating device and then is crystallized by virtue of the crystallizer, the obtained fresh water is recycled in the fresh water tank, and salt is separated out, dried into crystallized salt and transported outside after being encapsulated, so that zero discharge of the desulfurization waste water is realized, quality of the recycled fresh water is improved, and a chemical agent and operating cost are saved.

The invention relates to a method for treating high-calcium and high-salt industrial wastewater, belonging to the technical field of water treatment. The method adopts the following industrial wastewater treatment combined operation system: (a) a pretreatment system, (b) a hydrolysis-acidification and anaerobic biochemical treatment system, (c) a halophile pure-oxygen aeration biological treatment system. (d) a filam-touch-method biological treatment system and (e) an aeration biological treatment system. The invention provides a multi-system combined treatment method which has low treatment cost and sustainable and stable treatment effect and is suitable for treating high-calcium and high-salt environmental industrial wastewater. Under the harsh conditions that the wastewater to be treated has the salinity of 3.0 percent (accounted by CaCl2), the CoDcr concentration of 1250 mg / l and the NH3-N concentration of 41.3, the quality of the treated yielding water reaches the following indexes: the CoD concentration is smaller than 60mg / l, and the NH3-N concentration is smaller than 5mg / l. The invention is suitable for water treatment systems for petroleum exploration, petroleum refining, petroleum catalytic cracking, chlor-alkali plants and petrochemical devices of epoxy chloropropane, and the like.

The invention establishes a method for treating waste concentrated saltwater of reverse osmosis systems. The method mainly comprises the following steps that: the residual pressure of concentrated water produced by the self of a reverse osmosis system during water production is utilized to form high-salt spray so as to save power needed by conventional atomization; tiny water droplets quickly evaporate in floating air so as to separate water, salt and other impurities; meanwhile, organic matter contained by the water is oxidized to be carbon dioxide; vapor is input into a condensing chamber to turn into pure water, while salt and high-power tail water fall to the bottom of a separation chamber; the tail water and initial inflow water are mixed and circulated and then continue to be atomized and concentrated to a saturation state; the contained salt is subjected to heat-exchange condensation and then crystallization and precipitation; and water purification and salinity removal of reverse osmosis concentrated water are finally realized. The desalting and pollutant-reducing method for reverse osmosis concentrated water is suitable for the separation of the waste concentrated saltwater produced by every type of reverse osmosis systems.

The invention relates to a removing method and a removing apparatus for sulfate in high-salt petrochemical wastewater, and belongs to the technical field of wastewater treatment. According to the present invention, in order to provide a method with characteristics of low cost, simpleness, convenience and high sulfate removal rate, and an apparatus thereof, according to the principle of conversion of sulfate into hydrogen sulfide with sulfate reducing bacteria, residual sludge produced by a high-salt petrochemical wastewater treatment system precipitation tank is subjected to ultrasonic wave degradation through an ultrasonic wave treatment, the obtained sludge or sludge supernatant and high-salt petrochemical wastewater are mixed, and then enter an anoxic tank or anaerobic tank so as to provide a carbon source for the sulfate reducing bacteria, and a blowing removing manner under a N2 solution is adopted to remove the hydrogen sulfide so as to reduce inhibition effects of hydrogen sulfide and other sulfides on the sulfate reducing bacteria; and the sulfate reduction can be effectively promoted, the sulfate removal rate can be increased, the calcium sulfate scaling tendency can be reduced, the maintenance period and the service life of the equipment can be prolonged, and the system stability is increased.

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 provides a method and device for treating oil refining salt-containing sewage by using an oil refining waste catalyst and ozone. According to the method, the oil refining salt-containing sewage is subjected to catalytic oxidation treatment of internal circulation in a fluidized bed reactor by using ozone-containing gas and an activated oil refining waste catalyst, and the treated sewage flows through a vertical sedimentation basin and then is discharged outwards, wherein the CODcr (chemical oxygen demand) value of the effluent satisfies the primary standard A of Chinese Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). The device is used for implementing the method, and at least comprises a fluidized bed reactor and a vertical sedimentation basin. According to the method and the device disclosed by the invention, the oil refining waste catalyst is used as a sewage ozone treatment cooperating catalyst, so that a utilization direction of 'waste control by waste' is provided for solid wastes of oil refining plants, and the problem of relatively high cost of a catalyst is solved; and the mass transfer effect among ozone, a catalyst and organic pollutants is strengthened by using a fluidization technology, and the problems that the utilization rate of ozone is relatively low and the catalyst is easy to scale are solved.

The invention relates to a full-membrane method seawater desalting integration system adopting ultrafiltration-nanofiltration-reverse osmosis, and a full-membrane method seawater desalting integration process adopting ultrafiltration-nanofiltration-reverse osmosis, wherein the nanofiltration seawater softening recovery rate can be increased, and the membrane surface scaling tendency can be reduced. According to the present invention, the nanofiltration system is a three-stage nanofiltration system, wherein the first-stage nanofiltration membrane assembly and the second-stage nanofiltration membrane assembly are adopted as the pretreatment of the reverse osmosis, and the third-stage nanofiltration membrane assembly further treats the concentrated water obtained through the first-stage nanofiltration and the second-stage nanofiltration, such that the seawater recovery rate is increased, and the scaling tendency on the nanofiltration membrane surface of the first-stage nanofiltration membrane assembly and the second-stage nanofiltration membrane assembly is reduced so as to reduce the seawater desalting cost and reduce the scaling tendency of the third-stage nanofiltration membrane assembly during the high salinity concentrated water treatment.

The invention relates to a membrane element, a water treatment device and a water treatment method. Electrodes are respectively added to the water inlet end and the pure water end of the membrane element, and the electrodes are respectively positioned on the two sides of a membrane.

Reverse osmosis or nanofiltration membranes having a substrate on which a porous supporting layer is arranged, on which supporting layer a separation-active layer is arranged, on which separation-active layer a cover layer is arranged, wherein the separation-active layer comprises polyamide with acid chloride groups on the surface of the separation-active layer, and wherein the cover layer comprises a polymer containing functional groups, and the functional groups of the cover layer are coupled in a chemically reactive manner with the acid chloride groups of the polyamide of the separation-active layer. Embodiments are also directed to a method in which at least one cover layer is applied to the separation-active layer of polyamide immediately thereafter.

The invention discloses a membrane separation process for treating lead-zinc smelting wastewater, which comprises the following steps: pretreating lead-zinc smelting industrial wastewater through the processes of a multi-media filter, ultrafiltration, and the like after the wastewater reaches the discharge standard after the treatment of a heavy metal precipitation process; and performing desalinization treatment on the wastewater by a nanofiltration process, wherein water is produced for recycling and a concentrated solution reaches the standard after an intensified coagulation treatment and is discharged. The membrane separation process has the advantages of high wastewater recovery ratio by adopting a membrane process to perform recycling treatment on the lead-zinc smelting wastewater, good recycling water quality, advanced performance and economical practicability, high automation degree, and simple and convenient manual operation.

The invention relates to a high-calcium high-salt sewage denitrification carbon source and belongs to the technical field of sewage treatment. The high-calcium high-salt sewage denitrification carbonsource comprises an electron donor component, a scale inhibition component, a denitrification control component and an aid component. By adopting the high-calcium high-salt sewage denitrification carbon source provided by the invention, total nitrogen in sewage is effectively reduced, deposition of calcium solids is effectively prevented, the source is applicable to water quality fluctuation, andstable operation of a sewage treatment system is maintained.

The invention provides a high-temperature-resistant desulfurizer for the oil-gas field and a preparation method of the desulfurizer. 30%-60% of a triazine compound, 5%-20% of organic phosphonic acid, 5%-20% of heterocyclic organic amine, 5%-20% of water-soluble imidazolidine and the balance of water are weighed firstly, wherein the sum of mass percentages of all the components is 100%; the triazine compound is added to water and stirred uniformly, and a mixture B is obtained; heterocyclic organic amine, water-soluble imidazolidine and organic phosphonic acid are added to the mixture B sequentially, the mixture is stirred uniformly, and the high-temperature-resistant desulfurizer for the oil-gas field is obtained. The prepared desulfurizer has high desulfurization efficiency under the high-temperature condition of 90 DEG C; the product has certain scale and corrosion inhibition and sterilization performance; the prepared desulfurizer has the pH value being 7-8, and the scaling trend of carbonate and sulfate in the highly mineralized water environment can be delayed; the whole synthesis process adopts simple conditions and is easy to operate, low in cost, non-toxic, environment-friendly and suitable for industrial production.

The invention discloses an internal recycle photoelectron-catalytic oxidation combined treatment device. According to the treatment device, a water inlet (2) is formed in the bottom of a treatment device cylinder (1) and is communicated with a circular water distributor (3); wastewater is uniformly distributed to the bottom of the device through the circular water distributor (3); a photoelectron-catalytic oxidation combined treatment system (4) is arranged above the circular water distributor (3); a sediment mud bucket (5) is arranged under the circular water distributor (3) and is communicated with a mud discharge hole (6); under the condition that a direct-current power supply is loaded to the photoelectron-catalytic oxidation combined treatment system (4), the wastewater is lifted to the top of the device from the bottom of a photoelectron-catalytic oxidation unit (7); part of the wastewater is discharged out from a water outlet (9) in the upper part of the device; another part of the wastewater is further circulated to the bottom of the photoelectron-catalytic oxidation unit (7) through a central partitioning cylinder (8) and is mixed with water, then circulation of the wastewater inside the photoelectron-catalytic oxidation combined treatment system (4) is achieved, mud dregs generated from reaction can be discharged out from the mud discharge hole (6) at regular time, and generated tail gases can be discharged out from a top tail gas treater (10).

The present invention is directed to ultrafiltration membranes comprising a membrane substrate layer (S) based on a sulfonated polyaryleneethersulfone polymer and to a method for their preparation. Furthermore, the present invention is directed to ultrafiltration processes making use of said membrane.

A method and system for treating a water stream which contains Fouling Organics, where the water stream is recovered from an underground hydrocarbon-containing formation during SAGD oil recovery operations conducted on said formation. The method comprises injecting an oxidizing agent, preferably air, into the water stream when first recovered from the underground formation, and using a porous membrane to separate oxidized Fouling Organics and / or filter separable compounds formed due to injection of the oxidizing agent into the water stream, prior to transferring the water stream to a boiler for re-heating the water stream and turning same to steam for re-injection into said formation.

A submerged membrane bioreactor with non-fabric filter is composed of a tank containing microbial mixture liquid and a fitler module submerged in the said mixture liquid. The filter module has a penetrable surface for passing the mixture liquid through it, and is composed of a porous supporting material with the said penetrable surface and a second surface, and a non-fabric membrane with a thickness between 0.1-2 mm and pores between 0.2-100 microns covering on the second surface.

The invention provides a reverse osmosis membrane structure, a filter element and a water purifier, wherein the reverse osmosis membrane structure comprises a central tube, the central tube comprisesa concentrated water section and a pure water section which are isolated, the sidewall of the concentrated water section is provided with a concentrated water inlet, a concentrated water outlet is formed at one end of the concentrated water section away from the pure water section, the sidewall of the pure water section is provided with a central tube pure water inlet, and a central tube pure water outlet is formed in one end of the pure water section away from the concentrated water section. A reverse osmosis membrane assembly comprises a reverse osmosis membrane that is wound around the central tube to form a raw water flow channel and a pure water flow channel. One end of the raw water flow channel away from the central tube is provided with a first raw water inlet. A raw water outlet of the raw water flow channel is communicated with the concentrated water inlet. A pure water outlet of the pure water flow channel is communicated to the central tube pure water inlet. The increase ofthe raw water flow channel is achieved, the raw water comes in and goes out straightly, and the cross flow velocity of the reverse osmosis membrane is higher than that of ordinary membrane elements,the concentration polarization of the membrane surface can be effectively reduced, the membrane surface structure is improved, and the service life of the filter element is prolonged.

The invention discloses a synergist for assisting wet-process desulphurization of a thermal power plant. The synergist comprises the following components in percentage by mass: 55%-60% of organic acid, 15%-20% of organic acid salt, 10%-15% of oxidized catalyst, and 10%-15% of chelating dispersing agent. The acidity of the organic acid is stronger than that of carbonic acid and weaker than that of sulphurous acid, and the organic acid salt is used for providing organic acid groups. The synergist can reduce the surface tension between gas and liquid and improve the dispersion speed of gas to liquid; the concentration of calcium ions in the liquid solution can be increased, the crystallization speed of sulfate ions can be accelerated, and the desulfurization efficiency of the system and the utilization rate of lime stone can be improved; in addition, the characteristics of calcium sulfate crystals can be changed, so that muddy crystals can be produced, the crystals can be prevented from being deposited at parts, such as a spray nozzle.

The invention discloses a silicon carbide shell-and-tube heat exchanger with high heat transfer efficiency, and relates to the technical field of heat exchangers. The silicon carbide shell-and-tube heat exchanger comprises a tube box. Two tube plates are rotatably connected to the inner wall of the tube box. A tube bundle is arranged between the opposite surfaces of the two tube plates in a communicating mode. A first baffle plate, a second baffle plate and a third baffle plate are separately fixedly connected to the outer wall of the tube bundle. A forward helical fin is rotatably connected between the opposite surfaces of the first baffle plate and the second baffle plate. A reverse helical fin is rotatably connected between the opposite surfaces of the second baffle plate and the thirdbaffle plate. Through the forward helical fin, the reverse helical fin, a downstream helical fin, a hairbrush, and forcing blades, power generated by flowing of a heat medium can drive the forcing blades to rotate and further can drive the hairbrush to move circumferentially to clean adjacent tube bundles in real time and remove dirt on the surfaces. The dirt can flow out along with the heat medium, and therefore the self-cleaning function of the device is achieved.

The invention relates to a preparation method and application of a corrosion and scale inhibitor for ethylene glycol sealed circulating water. The corrosion and scale inhibitor is characterized by being prepared by respectively compounding, mixing and stirring a component A and a component B. The component A contains soluble molybdate, benzotriazole, an acrylic acid-acrylamide-acrylic acid-beta-hydroxyl propyl ester copolymer, sodium hydroxide and softened water. The component B contains an N-sodium lauroyl sarcosinate, sodium gluconate, itaconic acid-acryloyl morpholine-N-acryloyl-N-methyl propyl phosphonic acid copolymer, zinc chloride and softened water. The proportion of sum of weight is as follows: A:B=2:1. The corrosion and scale inhibitor is used for ethylene glycol sealed circulating water. The reagent treatment addition is 0.15-0.20g / 100ml of water.

The invention discloses a catalytic oxidation evaporation recovery system for a mercerizing waste alkali liquid of a yarn-dyed fabric. The system comprises a fresh alkali liquid filtration and collection unit, an alkali concentration and evaporation and collection unit and a concentrated alkali liquid catalytic oxidation decoloring nit, wherein the fresh alkali liquid filtration and collection unit comprises a self-cleaning filter A and a fresh alkali collecting tank which are sequentially connected in series by virtue of a pipeline; the alkali concentration and evaporation and collection unit comprises a dilating evaporator and the like, the outlet of a fresh alkali conveying pump is connected to a box body of the dilating evaporator by virtue of a pipeline, and a plurality of process routes for regenerating and reusing the waste alkali liquid, extracting valuable components and recovering and recycling are formed after treatment by the dilating evaporator; the waste alkali liquid is regenerated and reused by using a concentrated alkali catalytic oxidation decoloring process. By virtue of treatment means such as improving the hydraulic condition, increasing the reaction area and introducing the catalytic oxidation reaction and the like, processes such as settlement, filtration, catalytic oxidation, evaporation and the like are combined together, so that the system has the characteristics of high impurity-removing efficiency, high decoloring efficiency, and high evaporation efficiency and is simple and convenient to operate and maintain.

The invention relates to a low-temperature multi-effect seawater desalting inter-regenerative multi-stage spraying raw water supply system. The system is provided with an intermediate raw water heat exchanger, raw water is heated by a one-stage or multi-stage raw water regenerative heat exchanger and is then introduced into evaporator high-temperature effective units, saline water in the high-temperature effective units is refluxed progressively, is pressurized by an intermediate raw water pump, and is then introduced into an intermediate raw water heat-exchange heater to heat the raw water of the previous stage, and the raw water of this stage is cooled to be used as the raw water of the next effective unit. Compared with a one-stage parallel-flow supply system, the invention raises the concentration ratio of the equipment, improves the heat efficiency for water production, reduces the total raw water supply amount of the equipment, lowers the unit electricity consumption for water production, reduces the heat exchange of the raw water supply and heating equipment, and lowers the equipment cost to a certain extent. Compared with a multi-stage counter-flow raw water supply system, the invention enables low-salinity raw water to correspond to high temperature effect, enables high-concentration raw water to correspond to low temperature effect, lowers the fouling tendency of the equipment, and ensures that the operation of the equipment is safer.

The invention provides an electrochemical hardness-removing and turbidity-removing integrated device for processing coal gasification grey water or black water, a method for processing coal gasification grey water or black water and application of an electrochemical hardness-removing and turbidity-removing integrated device. The device comprises an electrochemical reaction area, an alkalinity regulating area and a settling area which are sequentially connected. The method includes: performing electrochemical processing on to-be-processed coal gasification grey water or black water, generating flocculation nucleuses in an in-situ manner, and forming a flocculation nucleus network; regulating the alkalinity of the coal gasification grey water or black water after the electrochemical processing to allow the scaling ions in the coal gasification grey water or black water to have reaction to generate sediments, and processing the sediments to obtain processed coal gasification grey water or black water. The method has the advantages that integrated full-automatic control is adopted, the hardness, turbidity or suspended matter of a coal gasification grey water / black water system are removed effectively, the scaling tendency of the system is lowered, system heat exchanging efficiency is increased, long-term stable operation of the system is guaranteed, and the method can be widely popularized and used in the field of coal gasification.

The invention relates to a sea water desalination and concentrated sea water concentration integrated system and a treatment method. The sea water desalination and concentrated sea water concentrationintegrated system comprises a multiple-effect evaporation sea water desalination subsystem, a regenerative heat concentration subsystem, a regenerative heat absorbing subsystem and a solution regeneration subsystem. According to the system, environment sea water is adopted as a raw material, more-than-0.15MPa steam or more-than-125DEG C hot water is adopted as a drive heat source, a small amountof electric energy is added, and fresh water with the saline concentration being lower than 0.003 percent and the concentrated sea water with the saline concentration being higher than 12 percent canbe produced, so that the fresh water is high-efficiently produced, meanwhile, a high-quality raw material solution is provided for various chemical substances such as salts, and the system has the advantages of high energy utilization ratio, high fresh water recovery rate, slow deposit corrosion, good economical efficiency and the like.

The invention belongs to the field of sewage treatment, particularly relates to a full-membrane-method seawater desalination treatment system. The system comprises a first-stage flat plate type negative charge nanofiltration unit, a second-stage positive charge roll type nanofiltration unit and a high-pressure roll type reverse osmosis membrane unit which are connected in sequence. The invention discloses a method for treating seawater by using the system at the same time. Flat plate type nanofiltration and reverse osmosis coupling are creatively applied to the seawater desalination treatmentprocess, due to the special membrane element structure form of CDNF, the pollution and blockage resistance of the membrane element is superior to that of conventional nanofiltration, the pretreatmentprocess can be omitted, and the treatment cost is reduced; meanwhile, a negatively-charged flat nanofiltration membrane, positively-charged roll nanofiltration membrane and high-pressure roll reverseosmosis membrane coupling process is creatively used, so that salt resources in seawater can be effectively separated, and the subsequent salt comprehensive utilization difficulty and treatment cost are greatly reduced.

The invention discloses an integrated advanced wastewater treatment device and a advanced wastewater treatment process of an anaerobic distillation membrane bio-reaction tank. The system mainly consists of a solar heating system, an anaerobic distillation membrane bio-reaction tank, a membrane discharged water circulating cooling system, an on-line membrane discharged water quantity detection system, a gas membrane surface scouring system and a gas collecting system. The system scientifically combines an anaerobic membrane bio-reaction (AnMBR) process with a membrane distillation (MD) process in one reaction tank by replacing a conventional microfiltration membrane with a hydrophobic distillation membrane, the removal rate of COD (Chemical Oxygen Demand) in the sewage is above 99%, and 99% of nitrogen (N), phosphorus (P) and metal ions can be removed. The device and the process disclosed by the invention are applicable to high-efficiency purification of various types of sewage and have a water discharging effect similar with an anti-osmosis water discharging effect.

The invention creatively provides a technological system for treating terrestrial heat tail water by utilizing a tubular membrane. The technological system comprises a cyclone sand remover, bag type filters, a tubular membrane filtering device, a washing tank, a washing ump, a degassing tank and an electric control device; two sets of the bag type filters are arranged; one bag type filter is usedand one bag type filter is standby, and the two bag type filters are alternatively used; the tubular membrane filtering device is divided into two grades; each grade comprises four tubular membrane filters which are arranged in parallel, three tubular membrane filters are used and one tubular membrane filter is standby; the system is provided with a thermometer, a pressure meter and a flow meter;the electric control device comprises a PLC (Programmable Logic Controller) and can realize online automatic backwashing of equipment and prevent fouling and blocking, so that stable operation of equipment is ensured. The technological system takes a tubular membrane as a core and integrates equipment including the cyclone sand remover, the bag type filters and the like to form a technology of treating the terrestrial heat tail water by utilizing a set of water treatment system; the technological system has the advantages of high integration degree, high automation degree, high treatment efficiency and long service life; water treatment can reach reinjection water quality requirements and the treatment cost of reinjection water is greatly reduced.

The present invention proposes a new formulation for the making of a cellulose acetate hollow fiber membrane for ultrafiltration with high water permeability, capable of oil and water separation with minimal energy consumption and low fouling tendencies.