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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.