89results about How to "Improve filtration throughput" patented technology

The invention relates to a silicon carbide ceramic support body and a preparation method thereof. The raw material powder of the support body is mixed powder consisting of silicon carbide powder 1 and silicon carbide powder 2, wherein the silicon carbide powder 1 has a median particle diameter D50 of 25-45mu m, the silicon carbide powder 2 has a median particle diameter D50 of less than 5mu m, the ratio of the D50 of the silicon carbide powder 1 to the D50 of the silicon carbide powder 2 is not less than 6, and the consumption of the silicon carbide powder 2 is 0.5-13 percent of the weight of the used silicon carbide powder 1. The raw material powder is mixed with a solvent, an adhering agent, a plasticizer and a pore-forming agent to form pug, the pug is subjected to stamping to form a raw blank, the raw blank is dewatered and degreased to form a calcined product, and the calcined product is sintered in argon or hydrogen atmosphere or vacuum to form the support body of a recrystallized silicon carbide ceramic membrane. The support body of the recrystallized silicon carbide ceramic membrane has filtering flux and strength which are higher than those of the traditional commercial support body of an aluminum oxide ceramic membrane.

The invention provides a multi-layer oil-water separator and a working method therefor. The separator comprises a water inlet and a water outlet, wherein a plurality of layers of separating materials are arranged between the water inlet and the water outlet; separating holes are formed in the separating materials; a runner is formed among the separating layers by virtue of a grid; the two sides of the grid are sealed; and the hole diameter of the separating holes is gradually reduced layer by layer from the water inlet to the water outlet. The multi-layer oil-water separator adopts a layer-by-layer filter mode, has good separating effect and relatively high filtration flux, and has cleaning and back cleaning functions, so that the service life of the separator is prolonged. The separator is compact in mechanism, high in integration and convenient for automatic operation and large-scale amplification.

The invention relates to a method for treating and reusing high-temperature stripping purified wastewater produced in the process of transferring oxygenated compounds into olefins by using a high-temperature separation membrane. The combination process can effectively remove the impurities such as metal ions and organic micro-molecules and the like in stripping purified water, and the treated purified water in a tower kettle can meet the quality requirements of makeup water for middle and low-pressure boilers or the quality requirements of the makeup water in the MTO process. The invention effectively overcomes the defects exiting in the method for treating and reusing the stripping purified water without condensation in the MTO process, and lowers or reduces the consumption of circulating cooling water in the process of cooling firstly and then treating, thereby saving a large amount of boiler water and recycling the thermal energy of produced high temperature wastewater, and providing a stable and efficient way for high temperature wastewater treatment and reuse of relevant enterprises.

The invention discloses a preparation system of car urea. The preparation system comprises a raw water tank (1), a raw water pump (2), a gravel filter system (3), an active carbon filter system (4), an ion exchange softening device (5), a pressurizing pump (6), a micro filter device (7), an ultra-filtration device (8), a middle water tank (9), a high pressure pump (10), a primary reverse osmosis device (11), a secondary reverse osmosis device (12), an EDI (electronic data interchange) system (13), an urea water barrel (14), a material storage tank (15), a primary filter system (16), a homogenization system (17), a discoloring system (18), a purifying system (19) and a filling device (20) which are connected in sequence by a pipeline. The system is reasonable in structural design, wide in range of application, good in equipment mating performance, high in automation degree, high in operability, small in floor area, capable of removing various ions in water, capable of reaching a salt removing rate of over 99.5%, stable in operation and high in utilization rate.

The invention discloses an inorganic-organic composite film. A support is made of inorganic porous materials and comprises organic materials and cross-linking agents which sequentially coat the support, the thickness of the inorganic porous materials is 1mm-3mm, the thickness of the organic materials is 10-50 micrometers, and the pore diameter of the inorganic-organic composite film is 0.001-1 micrometer. The inorganic-organic composite film has high-strength, impact-resistant, high-precision and high-selectivity filtration performances, and is excellent in renewability. According to a preparation method of the inorganic-organic composite film, after prepared organic material casting solution and the cross-linking agents are poured into a tank, the surfaces of the inorganic porous materials are sequentially coated with the organic material and the cross-linking agents in a spin coating mode, film preparation procedures are finished, operation is simple and convenient, controllability is strong, and stability is high.

The invention relates to a metallic filter membrane which can be used in flat filtration, cylinder filtration and folded filtration, etc. Said preparing method uses following materials: nickel, titanium, chrome, stainless steel, molybdenum, cobalt, iron, and copper, etc, that using the powder of one said material or the alloy powder to be mixed with adhesive to be plated on the frameworks (alloy porous base band or spongy base band with same characters of powder) to be sintered. The invention can prepare the filter membrane whose diameter in 0.1 nanometers to 5 micrometers according to the different granularities of powder, with the characters of high-temperature resistance, acid alkali resistance, large flux, small volume, and long service life.

The invention discloses a preparation method of an asymmetric plate ceramic nanofiltration membrane. According to the method, ceramic powder with different chemical composition and granular sizes is mixed with a water-based auxiliary, ceramic membrane slurry is prepared and printed on a plate ceramic membrane support body by a special porous emulsion roller, the support body is sintered at different temperatures, and the asymmetric plate ceramic nanofiltration membrane with different chemical composition and pore structures is formed on the surface of the support body. Density, diameter and depth of slurry adsorbing holes in the porous emulsion roller can be adjusted effectively with a laser drilling technology, so that thickness and uniformity of the ceramic membrane can be controlled precisely. The ceramic membrane with different thicknesses and surface pore size being 5-100 nm can be obtained with adoption of the porous emulsion roller with different pore density, pore diameter andpore depth. The asymmetric plate ceramic nanofiltration membrane is low in filtering resistance, high in filtering reflux, long in service life, energy-saving and environmentally friendly, and preparation cost is low.

The invention provides a washer. The washer comprises filter components and a flow switching device, wherein the filter components in pairs are configured to filter water pumped by a washing cylinder of the washer, so as to circulate the water in the washing cylinder for reuse; the flow switching device is at least provided with a cleaning port for fluid to flow in and a discharge port for draining the fluid out of the washer; the flow switching device is configured to conduct or break over the cleaning port and the discharge port in a controlled way, so as to form a cleaning flow path when the cleaning port and the discharge port are conducted, and drain the cleaning fluid out of the washer after the filter components are washed. The washer provided by the invention has an optimized flow layout and a control way, the filter components in a circulating water filter system can be automatically cleaned by a cleaning flow path, the life of the filter components in the washer can be prolonged, and the higher filtration flux can be ensured all the time; furthermore, a dense drain flow path, a spraying flow path, a pure water washing flow path and the like can be provided to meet the demands of the washer in different operating processes.

A method for producing a composite filter tube and filter element made of a multilayer metal mesh and metal powders, including: knitting to obtain metal meshes of different mesh numbers, obtaining a layered structure by means of a lamination method, then putting the layered structure in a vacuum furnace for sintering processing, sintering a metal composite layer to obtain a composite filter sheet and tube made of a multilayer metal mesh and metal powders with a multilayer metal mesh as a structure support layer and a metal powder sinter structure as a filter layer, then rolling the composite filter sheet and tube into a tubular filter element by using a shaping machine, and welding to obtain a composite filter tube and filter element product made of a multilayer metal mesh and metal powders.

The invention discloses a multi-channel kaolin plate ceramic membrane support, a preparation method and an application thereof. The preparation method includes the following steps: 1) mixing a kaolin ceramic aggregate, a pore forming agent, a dispersing agent and a gel-casting adhesive, ball-milling the mixture, adding RO water, heating the mixture to 40-85 DEG C and ball-milling the mixture for 4-20 h to obtain slurry; 2) maintaining the temperature of the slurry to be 40-85 DEG C, vacuum-defoaming the slurry, injecting the slurry into a moulding die, and performing in-situ moulding at 0-40 DEG C to obtain a wet blank; 3) demoulding the wet blank, shade-drying the wet blank at room temperature, drying the wet blank at 40-100 DEG C, and sintering the blank in air at 1000-1500 DEG C for 1-4 h with temperature maintained to obtain the multi-channel kaolin plate ceramic membrane support. The preparation method is carried out through the gel-casting process so that the method is wide in available range, is low in cost and is easy to control in processes. The blank body is high in strength, is low in organic substance content, can be sintered directly and is good in performance uniformity. The multi-channel kaolin plate ceramic membrane support has high total porosity and filtering flux, and is toxic-free and environment-friendly.

The invention discloses a fan-shaped rotary film separation device which comprises a central water-collecting pipe, an upper tray and a lower tray, wherein a transmission gear is arranged at one end of the central water-collecting pipe; the fan-shaped rotary film separation device is characterized in that multiple turntables are distributed between the upper tray and the lower tray, each turntable consists of at least three fan-shaped film components; water collecting pipes are arranged on two sides and the inner sides of the fan-shaped film components; hollow fiber film filaments are filled in the fan-shaped film components; water outlets are formed in the inner sides of the fan-shaped film components; the water outlets are connected with the central water-collecting pipe; fixing holes are formed in the outer sides of the fan-shaped film components; multiple fixing posts are arranged on the outer circumferences of the upper tray and the lower tray; the fixing holes are fixedly formed in the fixing posts. Compared with other rotary film devices, the fan-shaped rotary film separation device has the advantages of high filling density, high filtration flux and the like; moreover, a film is conveniently replaced, and the aim of replacing the film can be fulfilled by replacing a fan-shaped film components only.

The invention relates to an advanced treatment and reuse method of high-temperature nitrochlorobenzene wastewater, and concretely relates to a method for treating high-temperature nitrochlorobenzene wastewater by utilizing a membrane separation technology. The method comprises the following steps: 1, directly filtering water obtained after the oxidation-gravity settlement of nitrochlorobenzene wastewater by an ultrafilter membrane filtration system; 2, carrying out primary pressurization of water obtained after the ultrafilter membrane filtration in step 1, and directly conveying the pressurized water to a primary reverse osmosis membrane system for filtration; and 3, carrying out secondary pressurization of water filtered in step 2, and directly conveying the filtered water obtained in step 2 to a secondary reverse osmosis membrane system for filtration, wherein water obtained after the secondary reverse osmosis is process reuse water. The finally obtained treated nitrochlorobenzene wastewater can satisfy quality requirements of make-up water for middle and low pressure boilers.

The invention relates to the technical field of chlor-alkali chemical industry production, in particular to a back-washing regeneration method of a ceramic membrane method brine refining process filter; the ceramic membrane method primary brine filtering refining process is a novel refined brine filtering production process in chlor-alkali industry brine refining process at home and abroad; at present, the process has the disadvantages of high back-washing frequency and unclean silt removal, and a primary filtering side membrane pipe is easy to block by bridging brine sludge in crude brine and fiber matters, so as to cause the primary filtering pressure to be raised to above 0.5MPa, stopping is needed to carry out regeneration cleaning, and the normal production is affected. In the invention, crude brine is adopted and flows backwards from two grades to one grade, and back-washing is carried out for a plurality of times forcibly at the refined brine side, one-grade filtering pressure of the filter can be reduced below 0.3MPa, normal production is restored, and the production running time can be increased.

The invention belongs to the technical field of juice concentration and extraction, and discloses a processing method of concentrated juice. The processing method comprises the following steps: (1) juicing fresh fruits, and adding pectinase and cellulase for enzymolysis; (2) filtering enzymolysis pulp to obtain filter residues and a first filtrate, adding water to the filter residues, performing ultrasonic extraction and filtration to obtain a second filtrate, combining the second filtrate with the first filtrate, and performing filtration to obtain a coarse filtrate; (3) carrying out refinedfiltration on the coarse filtrate by using a nanofiltration membrane, and carrying out ultrafiltration treatment on the filtrate subjected to refined filtration by using a ceramic ultrafiltration membrane to obtain clarified juice; (4) concentrating the obtained clarified juice by using a reverse osmosis membrane to obtain concentrated juice; and (5) adding a stabilizer to the concentrated juice,fully stirring and uniformly mixing the concentrated juice, filling and sealing the uniformly mixed concentrated juice, and carrying out ultrahigh-pressure sterilization treatment and cooling to obtain the concentrated juice. The concentrated juice prepared by the method is fragrant and strong, can well retain nutritional ingredients and taste of the juice, and is stable in quality, simple and convenient in technological process and operation and low in investment and operation cost.

The invention aims to provide an extraction and purification method for high-purity purple sweet potato anthocyanin, in order to solve the problems of low extraction efficiency, easy polluted film filtration, low product purity, and the like, in the prior art. The method comprises the following steps: cleaning and peeling the raw materials; milling and crushing; extracting; centrifuging; performing first-level enzymolysis; absorbing resins; eluting; concentrating; performing second-level enzymolysis; performing yeast fermentation; filtering; performing spray drying, thus obtaining a high-concentration anthocyanin product. The purple sweet potato is milled and crushed after the cleaning and peeling process, so that the technology is capable of increasing the extraction rate of anthocyanin,reducing extraction time and reducing solvent consumption, namely, reducing the final handling capacity of the wastewater; the extracting solution is subjected to enzymolysis with pectinase, so that the flux of the membrane filtration is promoted and the membrane flux in the running process of the membrane is basically kept stable; yeast fermentation is adopted for removing the sugar from the anthocyanin resin purified solution, so that the product purity is greatly promoted.

The invention relates to a composite improved Al203 ceramic micro filter membrane, whose aperture is 200-500nm, wherein it is characterized in that: the inner surface of membrane hole is coated with two kinds of modified coats formed by semi conductive oxide, whose grain size is 5-20nm and thickness is 20-100nm. The invention reduces 17-30% aperture compared with former one, and improves 28% of filter reflux, with better acid alkali corrosion resistance.