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37results about How to "Lower transmembrane pressure" patented technology

Device and method for removing fluorine ions in groundwater

The invention provides a device for removing fluorine ions in groundwater, which comprises water inlet devices (1), a reaction device (2), ultra-filtration devices (3) and aeration devices (4), wherein the water inlet devices (1) are arranged on the reaction device (2) and are provided with material feed devices; the ultra-filtration devices (3) are arranged in the reaction device (2); the aeration devices (4) are arranged at the bottom of the reaction device (2) and aerate by aeration holes (16) on the aeration devices (4); the ultra-filtration devices (3) are provided with outlet pipes (5); and first water pumps (6) are arranged on the outlet pipes (5). The invention further provides a method for removing fluorine by the device for removing fluorine ions. The device for removing fluorine ions in groundwater has the characteristics of simple structure, convenient use, low cost, good fluorine removing effect, and high effluent quality.
Owner:HOHAI UNIV

Purification method for oilfield reinjection water

The invention discloses a purification method for oilfield reinjection water. According to the method, at least one level of membrane filtration treatment is carried out on oilfield produced water through a cellular carrier type inorganic carbon membrane component so as to prepare the reinjection water suitable for low permeability and extra-low permeability oil reservoirs, wherein the filter precision of the membrane component for membrane filtration treatment is 0.001-100mu m. The purification method has high filtration accuracy, the membrane flux of the compound carbon membrane carrier is large, the capacity of the membrane in resisting oil contamination is strong, the integration level of the structure of the membrane core is high, the quality of the prepared reinjection water is stable, and fine filtrated oilfield reinjection water meets the requirement of the reinjection water for the oil reservoirs in low permeability and extra-low permeability block, and meets the A-grade standard of 'recommended index and analysis method for quality of oil reservoir injection water of clastic rock' (SY / T 5329-94).
Owner:ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG

Supporting plate for flat membrane elements as well as flat membrane elements and flat membrane components

The invention relates to flat membrane elements and components for water treatment, which are characterized in that the front face and the back face of a supporting plate of membrane elements are respectively provided with a plurality of scattered face bosses higher than the supporting plate. The adjacent membrane elements are combined and are supported at intervals by means of the face bosses of the supporting plate. The supporting plate can not be tilted and deformed, the condition that the distance of each point between the planes of the adjacent membrane elements is unchanged is ensured, aerated scouring is uniform, and the membrane pollution is lowered. Moreover, the thickness of the supporting plate can also be obviously reduced, and the thickness is reduced from original 5.5 to 6.0mm to about 3.5mm, so that the weight and the cost of the supporting plate are lowered by about 30 percent, the bosses are arranged at intervals, the adjacent intervals of assembled membrane components can also be changed according to actual requirements, and the condition that the distance of the membrane elements can be regulated is realized. Furthermore, the method of assembling the components of the membrane elements is also changed, the function of side inserting assembly can be realized, the structure of a membrane bracket is simplified, and the versatility of a component frame is enhanced. The front face and the back face of the supporting plate are additionally provided with transverse flow passages with transverse penetration, so that the resistance of water collection and flow deflection is small, the transmembrane pressure difference of a system is small, the water output of gravitational pressure difference can be adopted for filtering, and the running energy consumption of the system can be greatly lowered.
Owner:江苏沛尔膜业股份有限公司

Purifying method of high-temperature condensed water

The invention discloses a purifying method of condensed water. The purifying method comprises the steps of adopting a honeycomb-shaped carrier type inorganic carbon membrane assembly to carry out at least one stage of membrane filtering treatment on high-temperature condensed water, wherein the filtering accuracy of the membrane assembly treated by membrane filtering is 0.001-100mum, and preparing the boiler supplementing water suitable for recycling. The purifying method disclosed by the invention has the advantages that the filtering accuracy is high, the membrane flux of a honeycomb-shaped carrier type membrane core is large, the impact resistance of incoming water is strong, the resistance to oil pollution is strong, the integration level of the membrane core structure is high, the preparation method is simple, a complex online discrimination system is not needed, and the prepared condensed water is stable in quality and high in temperature, meets the requirement on water quality of the boiler supplementing water and saves a great amount of heat.
Owner:ZHEJIANG CATHAYRIPE ENVIRONMENTAL ENG

Method for washing ultrafiltration membrane by combining ultrasonic waves and chemical cleaning agent

InactiveCN106268340AEnhance chemical cleaning effectRestore fluxUltrafiltrationUltrasonic assistedUltrafiltration
The invention discloses a method for washing an ultrafiltration membrane by combining ultrasonic waves and a chemical cleaning agent. The method comprises the following steps: washing the ultrafiltration membrane which is operated for a period of time, wherein the washing step is divided into physical washing and chemical washing; firstly, carrying out combined water and air backwashing on the ultrafiltration membrane and discharging all sewage in an ultrafiltration membrane assembly; preparing a sodium hypochlorite chemical washing solution and injecting the sodium hypochlorite chemical washing solution into an ultrafiltration membrane pool until the membrane assembly is immersed; immersing; then performing filtering and circulating backwashing; meanwhile, loading the ultrasonic waves to assist the chemical washing; finally, injecting a hydrochloric acid solution to immerse the membrane assembly, and immersing; then performing filtering and circulating backwashing; meanwhile, loading the ultrasonic waves to assist the chemical washing. Compared with the prior art, the method has the beneficial effects that an optimal medicament mass concentration and optimal ultrasonic frequency are obtained; ultrasonic wave assisting is added on the basis of the chemical washing to help to enhance the chemical washing effect and save medicament washing amount, so that the cost is saved.
Owner:HOHAI UNIV

Membrane bioreactor and membrane bioreactor membrane pollution control method and device

The invention discloses a membrane bioreactor and a membrane bioreactor membrane pollution control device and method. The membrane bioreactor comprises a fluid medium conveying device, an injection device and a movement device, wherein an exhaust port of a gas compressor of the fluid medium conveying device is communicated with an air inlet of a pipeline switching device through a gas conveying pipeline; the gas conveying pipeline is provided with a check valve; a liquid outlet of a liquid pump is communicated with a liquid inlet of the pipeline switching device through a liquid conveying pipeline; the liquid conveying pipeline is provided with a check valve; the injection device comprises an injection pipe and a plurality of nozzles; an inlet of the injection pipe is communicated with anoutlet of the pipeline switching device through a pipeline; each outlet of the injection pipe is provided with one nozzle; the movement device is installed in or out of the MBR (membrane bioreactor);the injection device is arranged on the movement device. According to the membrane bioreactor and the membrane bioreactor membrane pollution control device and method disclosed by the invention, in-situ efficient control on aerobiotic and anaerobic MBR membrane pollution can be met, operation is simple, energy consumption is low, and an application range is wide.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

System and method for off-line chemical cleaning of MBR on line

ActiveCN107349793ALower construction and operating costsImprove cleaning efficiencySemi-permeable membranesEngineeringSludge
The invention relates to a system and method for off-line chemical cleaning of an MBR (membrane bio-reactor) on line. The system consists of a cleaning and drug adding system, an aeration system, a backwashing system, a liquid medicine emptying and replacement system, and an online monitoring system. A three-way master valve is disposed on a pipeline between a residual sludge pump and a sludge storage tank of the liquid medicine emptying and replacement system, and a pipeline is disposed between the three-way master valve and an MBR corridor. When a plurality of MBR corridors are disposed, the set pipelines are equal to the MBR corridors, three-way valves are arranged between the pipelines and are in parallel connection, and the last MBR corridor has no need for setting of a three-way valve. By adding the three-way master valve and the three-way valves and pipelines leading to all the MBR corridors, the soaked liquid medicine can be pumped through the residual sludge pump to other corridors for further use. Without lifting out the MBR, the system and method provided by the invention can achieve an effect equal to off-line chemical cleaning, and can flexibly grasp the off-line cleaning time and improve the cleaning efficiency.
Owner:TIANJIN UNIV

Oily wastewater treatment device and method

The invention discloses an oily wastewater treatment device and method. The oily wastewater treatment device comprises a wastewater tank, a suction pump, a powdered activated carbon storage tank and a contact tank, wherein the contact tank comprises a tank body and a ceramic membrane module, the ceramic membrane module is installed in the tank body, the tank body is provided with a water inlet, a water outlet, a residue discharging port and a powder inlet, the wastewater tank is communicated with the water inlet, the suction pump is communicated with the water outlet, the residue discharging port is formed in the bottom of the tank body, and the powdered activated carbon storage tank is communicated with the powder inlet to add the powdered activated carbon to the tank body. The ceramic membrane module is a container structure formed by a ceramic membrane and provided with an outlet, the outlet is communicated with the water outlet, and the ceramic membrane is formed by integrally firing a supporting layer and an effective layer provided with pore channel. By the adoption of the oily wastewater treatment device and the method, the water quality requirement of reused wastewater of an oil field can be met, and the suspended matter content and oil content of output water and the median size of suspended matter can all meet the highest requirement for reinjected water of the oil yield.
Owner:深圳市康源环境纳米科技有限公司 +1

Cleaning method of immersed ultrafiltration membrane

The invention provides a cleaning method of an immersed ultrafiltration membrane. The method comprises the following steps: 1) carrying out primary alkali washing: emptying an ultrafiltration membranetank, conveying an alkaline cleaning solution into the ultrafiltration membrane tank until ultrafiltration membrane filaments are completely immersed in the cleaning solution, and carrying out soaking alkali washing on the ultrafiltration membrane; 2) backwashing the ultrafiltration membrane tank; 3) carrying out primary acid cleaning: emptying the ultrafiltration membrane tank, conveying an acidic cleaning solution into the ultrafiltration membrane tank to completely immerse ultrafiltration membrane filaments, and carrying out soaking and acid cleaning on the ultrafiltration membrane; 4) backwashing the ultrafiltration membrane tank; 5) carrying out secondary alkali washing: emptying the ultrafiltration membrane tank, conveying the alkaline cleaning solution into the ultrafiltration membrane tank until ultrafiltration membrane filaments are completely immersed, and carrying out soaking and alkali washing on the ultrafiltration membrane; 6) backwashing the ultrafiltration membrane tank; 7) carrying out secondary acid cleaning: emptying the ultrafiltration membrane tank, conveying the acidic cleaning solution into the ultrafiltration membrane tank till the ultrafiltration membranefilaments are completely immersed, and carrying out soaking and acid cleaning on the ultrafiltration membrane; and 8) backwashing the ultrafiltration membrane tank. The method has a remarkable recovery effect on cleaning of the ultrafiltration membrane polluted by multiple components at the same time and is excellent in working performance.
Owner:LUTAI TEXTILE

Industrial wastewater treatment method and device

The invention relates to an industrial wastewater treatment method and an industrial wastewater treatment device. The industrial wastewater is collected by using a collection tank of a workshop. With a centrifugal elevation pump, the wastewater is pumped into a treatment water tank of the industrial wastewater treatment device with a tubular membrane filtration assembly; sodium hydroxide or potassium hydroxide is added in a delivery pipe; sufficient reaction is carried out under the stirring of the centrifugal elevation pump, such that hydroxide deposit which is insoluble in water is produced; and the water obtained after reaction is filtered by using the industrial wastewater treatment device with the tubular membrane filtration assembly. The device comprises sequentially connected components of the collection tank, the delivery pipe, and a membrane filtration device. The elevation pump is arranged on the delivery pipe. The membrane filtration device comprises the treatment water tank. The membrane filtration assembly is arranged and immersed in the treatment water tank. The membrane filtration assembly is respectively connected with a pipe delivery system. An aeration device is arranged in the treatment water tank. The membrane filtration assembly is composed of a tubular membrane filtration unit. An opened frame is arranged on the outer periphery of the tubular membrane filtration unit. A tubular filtration membrane is arranged in a sealed state on a frame plane. A water outlet pipe is arranged on the frame. With the device, solid impurities can be effectively removed, and waste water can be really turned into a resource.
Owner:陈卫

Double water collection type flat sheet membrane element and support plate thereof

The invention provides a support plate for a flat sheet membrane element. The support plate comprises a rectangular main body and two water collection pipes, wherein the two water collection pipes are respectively fixed on the left side and the right side of the rectangular main body; ten to twelve first longitudinal flow guide grooves and two first transverse flow guide grooves are formed in the front surface of the rectangular main body; the two first transverse flow guide grooves are respectively positioned at the upper end and the lower end of the ten to twelve first longitudinal flow guide grooves and are respectively communicated with the ten to twelve first longitudinal flow guide grooves. According to the double water collection type flat sheet membrane element and the support plate thereof, flow guide passages are utilized for running through the longitudinal flow guide grooves and the transverse flow guide grooves in the two surfaces of the support plate, so that water can smoothly flows in the flow guide grooves during water collection, and the subjected resistance is greatly reduced when the water comes out, so that the transmembrane pressure of the system is reduced, the operation consumption of the system can be greatly reduced during suction and drainage, and the water production efficiency is also improved.
Owner:CHANGZHOU XIAOGUO INFORMATION SERVICES

Ferrihydrite-ultra-filtration (UF) membrane combination process for removing trivalent arsenic and disinfection by-product precursors

The invention relates to a ferrihydrite (FH)-ultra-filtration (UF) membrane combination process for removing trivalent arsenic and dissolved organic matters (DOMs) in water, so as to control disinfection by-products (DBPs) and relieve membrane pollution, belonging to the technical field of water treatment. The process comprises the following steps: adding an adsorbent FH into a hollow fiber UF membrane filtration system, maintaining a suspension state by means of aeration, providing a shearing force to reduce the enrichment of pollutants on the surface of the membrane, and separating out the adsorbent from the water by means of UF membrane filtration. The process utilizes the trivalent arsenic to bond with monoatomic or diatomic O on the surface of FH, and simultaneously enables the FH andthe DOMs to be subjected to a coordination exchange reaction so as to form a coordination complex, so that 99.4% of the trivalent arsenic, 80.2% of a trihalomethane precursor and 90.4% of a haloacetic acid precursor are effectively removed, the concentrations of the arsenic and all the DBPs in effluent reach the drinking water standard, and the safety of drinking water is accordingly guaranteed.Furthermore, FH adsorption pretreatment reduces the enrichment of the DOMs on the surface of the membrane and the absorption inside membrane pores, so that the transmembrane pressure difference is reduced by 65.5%, and membrane fouling is significantly alleviated.
Owner:BEIJING NORMAL UNIVERSITY +1

Device and method for slowing down membrane pollution

The invention provides a device and method for slowing down membrane pollution, and belongs to the field of membrane pollution control. According to the method, in an adsorption-membrane combination process, to-be-treated water enters a rotating membrane assembly after being adsorbed by an adsorbent. The method is mainly applied to the technical field of membrane pollution control, is simple to operate, economical and practical, and breaks through serious membrane pollution caused by large filter cake layer thickness, high compactness and the like due to standing of a membrane assembly in an existing adsorption-membrane combination process.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI

Inorganic hollow ceramic flat sheet membrane filter core drinking water device

The invention discloses an inorganic hollow ceramic flat sheet membrane filter core drinking water device, comprising a water storage component, an active carbon filter and an inorganic hollow ceramic flat sheet membrane filter; the upper end of the active carbon filter is connected with a running water or well water pipe, and the lower end is provided with a primary clean water outlet and washing water outlet; the primary clean water outlet is connected with the upper end of the inorganic hollow ceramic flat sheet membrane filter through a middle pipe, and the active carbon filer comprises a membrane shell tank body, a ceramic filter core and an active carbon layer; the lower part of the ceramic plate is provided with water outlet nozzles II at intervals, the lower end of the inorganic hollow ceramic flat sheet membrane filter is provided with a secondary clean water outlet and a washing water outlet; the inorganic hollow ceramic flat sheet membrane filter comprises an RO membrane shell tank body and a hollow ceramic flat panel membrane sheet. The device solves the problems of being difficult in cleaning, complex in maintenance, short in service life, easy to be corroded by acid and alkali, unable to resist organic solvent, high in running cost, and easy to cause difficult sewage discharge, and others during the running of the organic membrane running, and effectively improves the service life and reliability of the drinking device.
Owner:周章海

Membrane bioreactor

The invention discloses a membrane bioreactor comprising a biological reaction tank, a membrane tank, cleaning liquor, a water producing pump, a water producing port, a backwashing water pump, a chemical feed pump, a chemical box, a blower, a reflux pump and a sludge discharge pump. Wastewater needing treatment is injected into the biological reaction tank firstly and then passes the membrane tank, the cleaning liquor is injected into the membrane tank, the wastewater in the membrane tank is treated via vacuum pumping, the water producing pump and compressed air prior to entering the backwashing water pump, and the water flowing out after backwashing is injected into the chemical box via the chemical feed pump, then enters the membrane tank, passes the reflux pump and the blower and flows back to the biological reaction tank again. The cleaning liquor added into the membrane bioreactor comprises alkalies of sodium hypochlorite 3000 mg / l in concentration and sodium hydroxide water solution 1% in concentration, and acids of oxalic acid 1% in concentration.
Owner:SHANXI RONGSHENDA SCI & TECH

Membrane fouling control enhancing membrane bioreactor and operation method thereof

The invention discloses a membrane fouling control enhancing membrane bioreactor and an operation method thereof, and belongs to the field of environment protection equipment. The membrane fouling control enhancing membrane bioreactor comprises a reactor wall (1), a membrane element (2), a collection pipe (3), a water collection pipe (4), a vacuum meter (5), a suction pump (6), a cleaning component, an air compressor (15), an aerator pipe (16), an aerator head (17), a water inlet pipe (18) and a sludge discharge pipe (19). To solve the problems of operation complexity, difficulty in online washing and possible chemical-agent-caused secondary pollution in the prior art of membrane fouling control, an automatic mechanical transmission device is designed, a cleaning member mounted at the end of the device is used for cleaning fouling layers of flat membrane surfaces periodically, and the objectives of controlling membrane fouling in situ, improving system water generation capability, increasing backwashing cycle and improving membrane reactor processing efficiency are achieved.
Owner:NANJING UNIV YANCHENG ENVIRONMENTAL PROTECTION TECH & ENG RES INST +1

Tap water treatment method and method for reducing membrane pollution in water treatment process

The invention discloses a tap water treatment method and a method for reducing membrane pollution in the water treatment process. The tap water treatment method comprises the steps that raw water is subjected to pretreatment and then subjected to ultraviolet radiation, ultrafiltration and chlorine disinfection in sequence. In the tap water treatment method, the ultrafiltration and ultraviolet processes in an original water treatment technology are adjusted, the disinfecting function that ultraviolet radiation controls microorganisms is reserved, and meanwhile, the effect for protecting an ultrafiltration membrane is added; the pollution to an ultrafiltration membrane in the ultrafiltration process is reduced, operation energy consumption is reduced, the service life of the membrane in themembrane treatment process is obviously prolonged, the tap water treatment cost is reduced, the aims of energy conservation and emission reduction are achieved, and the method highly accords with theenvironmental protection concept of green technologies.
Owner:北京市自来水集团有限责任公司技术研究院

Continuous process for preparing mesophase pitch from refined raw oil

The invention provides a continuous process for preparing mesophase pitch from refined raw oil, which comprises the following steps: by taking one or more of aromatic hydrocarbon-rich heavy oil, catalytic slurry oil, coal tar or ethylene tar as a raw material, decompressing to obtain a heavy fraction section of which the temperature is greater than 300 DEG C, and sequentially passing through an ultrasonic-assisted filtration de-ashing coupling enhanced extraction unit, a sedimentation unit and a solvent-oil separation unit, integrating a liquid-solid adsorption separation unit to obtain refined raw oil which is single in structural composition, narrow in molecular weight distribution and low in content of heteroatoms and solid impurities, and introducing the refined raw oil into a co-carbonization unit to be subjected to co-carbonization reaction with naphthenic base vacuum three-line and four-line distillate oil to obtain the mesophase pitch with the softening point being 220-310 DEG C, the mesophase content being larger than 92% and good spinnability. According to the method, high value-added utilization of the heavy distillate oil is realized through a highly integrated process, the operable space is large, the universality is high, and an important foundation is laid for preparing a high-performance petroleum-based carbon material.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Method for refining ionic membrane caustic soda primary refined brine

The invention relates to a method for refining ionic membrane caustic soda primary refined brine, which comprises the following steps: adding sodium carbonate into saturated brine to react with calcium ions to form calcium carbonate, and adding sodium hydroxide to react with magnesium ions to form magnesium hydroxide; so that primary refined brine meeting the refining requirement of the ionic membrane caustic soda secondary brine is obtained by directly adopting a plate ceramic membrane for filtration, calcium and magnesium ions are smaller than or equal to 1 mg / L, and suspended solids are smaller than or equal to 1 mg / L. Compared with the prior art, the method has the advantages that the conventional pretreatment process is omitted, and the high-quality and stable refined brine is obtained at a time.
Owner:南京纳亿工程技术有限公司

Oxygenator

The invention discloses an oxygenator. The oxygenator comprises a shell, an oxygenation layer, a temperature layer, gas openings, fluid openings and a blood opening; the shell comprises an outer shell and an end cover; the blood opening and an exhaust hole are formed in the end cover; the oxygenation layer is formed by stacking a plurality of oxygenation films and forms a gas passage with the gas openings; the temperature layer is formed by stacking a plurality of temperature films, and forms a fluid passage with the fluid openings; and the blood opening and the gap between the oxygenation layer and the temperature layer form a blood passage, and the structure is used for conducting gas exchange and temperature control on blood. The invention discloses the oxygenator which is optimized in structure, excellent in performance and capable of solving the problems of rupture, liquid leakage, poor oxygenation efficiency, thrombosis and the like in the clinical use process.
Owner:SUZHOU HENGRUI HONGYUAN MEDICAL TECH CO LTD

Multi-membrane combined double-circulation bioreactor, multi-membrane combined double-circulation biological treatment system and low-carbon-nitrogen-ratio organic wastewater treatment method

The invention provides a multi-membrane combined double-circulation bioreactor, a multi-membrane combined double-circulation biological treatment system and a low-carbon-nitrogen-ratio organic wastewater treatment method, and belongs to the technical field of wastewater treatment. The multi-membrane combined double-circulation bioreactor is reasonable in structural arrangement and can realize double internal circulation, and when the multi-membrane combined double-circulation biological treatment system based on the multi-membrane combined double-circulation bioreactor is used for treating low-carbon-nitrogen-ratio organic wastewater, a carbon source and a phosphorus removal agent are not added, and an advanced treatment unit is not additionally arranged; meanwhile, under the conditions of low energy consumption and low residual sludge yield, stable and efficient nitrogen and phosphorus removal effects can be realized; in addition, the suspended sludge amount and transmembrane pressure difference in the treatment process can be reduced, the reduction of membrane flux is delayed, the service life and the working period of the membrane are prolonged, and the investment and operation maintenance cost of a treatment system is saved.
Owner:广西桂润环保科技有限公司

Device and method for removing fluorine ions in groundwater

The invention provides a device for removing fluorine ions in groundwater, which comprises water inlet devices (1), a reaction device (2), ultra-filtration devices (3) and aeration devices (4), wherein the water inlet devices (1) are arranged on the reaction device (2) and are provided with material feed devices; the ultra-filtration devices (3) are arranged in the reaction device (2); the aeration devices (4) are arranged at the bottom of the reaction device (2) and aerate by aeration holes (16) on the aeration devices (4); the ultra-filtration devices (3) are provided with outlet pipes (5); and first water pumps (6) are arranged on the outlet pipes (5). The invention further provides a method for removing fluorine by the device for removing fluorine ions. The device for removing fluorine ions in groundwater has the characteristics of simple structure, convenient use, low cost, good fluorine removing effect, and high effluent quality.
Owner:HOHAI UNIV

Immersed membrane biological integrated reactor for up-to-standard reinjection of oilfield produced water into ultra-low permeable layer and application of immersed membrane biological integrated reactor

The invention relates to an immersed membrane biological integrated reactor and application, in particular to an immersed membrane biological integrated reactor for standard reinjection of oilfield produced water into an ultra-low permeable layer and application. The invention aims to solve the problems that the organic matter degradation efficiency is low and the treated water quality does not reach the standard when the existing device is used for treating the reinjection ultra-low permeable layer produced water. An immersed membrane biological integrated reactor for an ultra-low permeable layer for standard reinjection of oilfield produced water comprises a box body, and the interior of the box body is divided into a plurality of reaction chambers by baffle plates along the water flow direction; the plurality of reaction chambers comprise a first anaerobic chamber, a second anaerobic chamber, a third anaerobic chamber, an anoxic chamber, a first aerobic chamber, a second aerobic chamber and an immersed membrane reaction chamber which are sequentially connected in series. The invention relates to a submerged membrane biological integrated reactor for reinjecting oilfield produced water to an ultra-low permeable layer after reaching the standard, which is used for treating the produced water of the ultra-low permeable layer after being reinjected. According to the invention, the immersed membrane biological integrated reactor for reinjection of oilfield produced water to the ultra-low permeable layer after reaching the standard can be obtained.
Owner:DAQING OILFIELD ENG +1

Pre-coating and air-flotation integrated apparatus

The invention discloses a pre-coating and air-flotation integrated apparatus. The apparatus comprises a multiphase flow dissolved air flotation unit and a pre-coating filtration unit, and in combination with a water inlet settling tank, a water production tank, a sludge dirt tank and the like, a set of complete sewage treatment equipment is formed; the air flotation unit is combined by a water inlet pump, a coagulation stirring device, a dosing device and a multiphase flow dissolved air flotation device to realize sewage pretreatment; and the pre-coating filtration unit is combined by a booster pump, a pre-coating filtration device, a membrane powder adding device and a backwash pump and is automatically controlled by a programmable logic controller (PLC). According to the invention, an air floatation device and a pre-coating device are integrated and optimized, and the pre-coating and air-flotation integrated apparatus is provided, so that the sewage treatment equipment with high process applicability, stable operation, controllable operation cost and high operability is realized, and therefore, requirements by the environmental protection situation that quality of inlet water ofsewage treatment is more and more complex while quality requirement of outlet water is higher and higher can be met.
Owner:青岛海晏环境技术工程有限公司

Ultrafiltration membrane pool with secondary on-line coagulation function

The invention provides an ultrafiltration membrane pool with a secondary on-line coagulation function, relates to an ultrafiltration membrane pool, and aims to solve the problems of non-uniform water intake, impact on membrane components, large transmembrane pressure difference and high operation energy consumption in the conventional ultrafiltration membrane pool. A plurality of membrane components are arranged in the membrane pool sequentially along the length direction; a plurality of inclined plates are arranged below the membrane components; a discharge valve is arranged in a sludge area and near the side wall of a drainage channel; the water inlet end of the membrane pool and a water inlet total channel are communicated mutually; a liquid level control valve is arranged at the water inlet end of the membrane pool; two water distribution hole main pipes are correspondingly arranged on the inner walls of the two sides of the membrane pool horizontally along the length direction and positioned at the upper end of the membrane pool; a plurality of water distribution holes are distributed in each water distribution hole main pipe uniformly along the length direction; an energy dissipation weir is arranged below each water distribution hole main pipe and arranged oppositely to the corresponding water distribution hole; and the lower end face of each energy dissipation weir is contacted with the upper end of a corresponding water inlet grating lattice wall. The ultrafiltration membrane pool with the secondary on-line coagulation function is applied to advanced treatment of drinking water.
Owner:HARBIN INST OF TECH

A system and method for off-line chemical cleaning of mbr membrane units on-line

ActiveCN107349793BLess investmentAchieve the effect of off-line chemical cleaningSemi-permeable membranesAeration systemSludge
The invention relates to a system and method for off-line chemical cleaning of an MBR (membrane bio-reactor) on line. The system consists of a cleaning and drug adding system, an aeration system, a backwashing system, a liquid medicine emptying and replacement system, and an online monitoring system. A three-way master valve is disposed on a pipeline between a residual sludge pump and a sludge storage tank of the liquid medicine emptying and replacement system, and a pipeline is disposed between the three-way master valve and an MBR corridor. When a plurality of MBR corridors are disposed, the set pipelines are equal to the MBR corridors, three-way valves are arranged between the pipelines and are in parallel connection, and the last MBR corridor has no need for setting of a three-way valve. By adding the three-way master valve and the three-way valves and pipelines leading to all the MBR corridors, the soaked liquid medicine can be pumped through the residual sludge pump to other corridors for further use. Without lifting out the MBR, the system and method provided by the invention can achieve an effect equal to off-line chemical cleaning, and can flexibly grasp the off-line cleaning time and improve the cleaning efficiency.
Owner:TIANJIN UNIV

A continuous process for preparing mesophase pitch from refined raw material oil

The invention provides a continuous process for preparing mesophase pitch from refined raw material oil, using one or more of aromatic-rich heavy oil, catalytic oil slurry, coal tar or ethylene tar as raw material, and depressurizing to obtain heavy In the distillate section, through ultrasonic-assisted filtration deashing coupling enhanced extraction unit, sedimentation unit, agent-oil separation unit, and integrated liquid-solid adsorption separation unit, a refined product with a single structure, narrow molecular weight distribution, and low heteroatom and solid impurity content is obtained. The raw material oil is introduced into the co-carbonization unit, and undergoes co-carbonization reaction with naphthenic vacuum third-line and fourth-line distillates to obtain mesophase pitch with a softening point of 220-310°C, a mesophase content of >92%, and good spinnability. The invention realizes high value-added utilization of heavy distillate oil through a highly integrated process, has large operable space and high universality, and lays an important foundation for preparing high-performance petroleum-based carbon materials.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

Cleaning and regenerating device and cleaning and regenerating method for waste reverse osmosis membrane of thermal power plant

The invention discloses a cleaning and regenerating device and a cleaning and regenerating method for a waste reverse osmosis membrane of a thermal power plant, the best effect is achieved by optimizing the device structure and cleaning process parameters, cleaning is performed by adopting a cleaning mode combining forward cleaning and reverse cleaning with different cleaning agents, the effect of reducing the transmembrane pressure difference of the waste membrane is obvious, damage to the membrane desalination rate is low, the water yield of the cleaned waste membrane element is about 1.5-2.5 times that of a new membrane, the desalination rate can reach 95-97.5%, and the device can be recycled in scenes with requirements on low energy consumption, high flux and low desalination rate, and has high environmental protection value.
Owner:HANGZHOU WATER TREATMENT TECH DEV CENT +2

Membrane bioreactor and membrane fouling control device and method for membrane bioreactor

The invention discloses a membrane bioreactor and a membrane bioreactor membrane pollution control device and method. The membrane bioreactor comprises a fluid medium conveying device, an injection device and a movement device, wherein an exhaust port of a gas compressor of the fluid medium conveying device is communicated with an air inlet of a pipeline switching device through a gas conveying pipeline; the gas conveying pipeline is provided with a check valve; a liquid outlet of a liquid pump is communicated with a liquid inlet of the pipeline switching device through a liquid conveying pipeline; the liquid conveying pipeline is provided with a check valve; the injection device comprises an injection pipe and a plurality of nozzles; an inlet of the injection pipe is communicated with anoutlet of the pipeline switching device through a pipeline; each outlet of the injection pipe is provided with one nozzle; the movement device is installed in or out of the MBR (membrane bioreactor);the injection device is arranged on the movement device. According to the membrane bioreactor and the membrane bioreactor membrane pollution control device and method disclosed by the invention, in-situ efficient control on aerobiotic and anaerobic MBR membrane pollution can be met, operation is simple, energy consumption is low, and an application range is wide.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY

Zero discharge and chromium recovery method for iron and steel industry chromium-containing wastewater

The invention relates to a zero discharge and chromium recovery method for iron and steel industry chromium-containing wastewater. The method includes: sending chromium-containing wastewater generatedin a steel rolling process into a wastewater regulating tank for pretreatment, adding a flocculant into the wastewater regulating tank for precipitation, and discharging sludge for sintering treatment; sending supernatant wastewater in the wastewater regulating tank sequentially into a multi-medium filter and a security filter for filtration treatment, and then sequentially enabling the treated wastewater to enter a micro-filtration membrane assembly for filtration and a reverse osmosis membrane assembly for desalination, recycling the produced water desalinated by the reverse osmosis membrane assembly to a circulating water system to replace new water or soft water, and sending reverse osmosis concentrated water into a reduction tank for reduction and detoxification; feeding a Cr(OH)3-containing suspension into a spray evaporation system after detoxification, and carrying out spray drying to generate a Cr(OH)3 crude product; putting the Cr(OH)3 crude product into a calcining furnace,and performing calcining at 1050DEG C-1150DEG C to obtain a chrome green crude product. The method has the beneficial effects that: the occupied area is small, the operation is stable, and zero discharge of wastewater and recycling of chromium resources are realized.
Owner:武汉钢铁有限公司
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