169results about How to "Reduce filter pressure" patented technology

Disclosed is a method for making pH sensitive PVDF hollow fiber intelligent film and products made thereby, wherein the making process comprises the steps of, (1) steeping the film in pure water for 24 hours, (2) preparing 10-20% alkali solution, and charging 3-4gl/L of tetrabutylammonium bromide, charging immersed film in alkali solution, heating by water bath, (3) preparing 1-2 mol/L of AAC solution, charging dimethyl formamide solution by 40-50ml/L, mixing uniformly, charging alkali-treated film in the mixed solution, steeping 10-20 minutes at room temperature, preparing solution of crosslinking agent 0.01-0.09mol/L and K2S2O3 0.1-0.3g, charging the readily made film into the solution, filling N2 and sealing, water-bathing, heating and washing with deionized water, the crosslinking agent is MBAA or diacrylic acid ethylene glycol ester.

The invention provides a method for producing polyester POY filament in scale by recycling PET bottle chip. Recycled waste PET bottles are crushed into flaky bottle chip, dried after cleaning, and then sent into a crystallizing bed body; under the action of hot air entering the crystallizing bed body, crystallization is carried out, a crystallizing layer is formed on the bottle chip surface, and then the bottle chip is sent into a drying tower for drying; the dried bottle chip enters a screw extruder for melt extrusion, and the obtained melt is sent into a two-stage filtering device for filtering and then enters a spinning box; and a high-speed spinning process is adopted for spinning to produce the polyester POY filament. The method for producing the polyester POY filament adopts a filling type drying mode, the drying is even and the operating cost is low; a screw mixer is arranged in the drying tower, which solves the problem of 'arching' that happens to the recycled PET bottle chip during the drying process; and the two-stage filtering device is adopted, which ensures the filtering quality. Therefore, the high-end product-polyester POY filament can be continuously produced in large scale.

Disclosed is a method for making temperature-sensitive PVDF hollow fibre intelligent film and products made by chemical grafting and copolymerization of NIPA on PVDF film surface, and the making process comprises the steps of, (1) steeping the film in pure water for 24 hours, (2) preparing 10-20% alkali solution, and charging 3-4gl/L of tetrabutylammonium bromide, charging immersed film in alkali solution, water-bathing, heating and washing for later use, the alkali solution is one of KOH, NaOH or LiOH, (3) preparing 1-2 mol/L of NIPA solution, charging dimethyl formamide solution by 40-50ml/L, mixing uniformly, charging alkali-treated film in the mixed solution, steeping at room temperature, preparing solution of crosslinking agent 0.01-0.09mol/L and K2S2O3 0.1-0.3g, charging the readily made film into the solution, filling N2 and sealing, water-bathing, heating and washing with deionized water, the crosslinking agent is MBAA or diacrylic acid ethylene glycol ester.

The present invention relates to a method and a system for filtering a real-time junk mail. A mail text and mail description information are extracted first, an algorithm is generated by adopting an efficient characteristic pattern to switch the mail text to be a combination of a plurality of fingerprints, to represent an original mail. If the memory has no mail with the similar content with the current mail, a mail class is created in the memory, and the information about fingerprint and description of the current mail is preserved; only the description information in the mail class is updated, if the mail number contained in the mail class exceeds the predefined threshold value of the junk mail, the mail class is taken as a junk mail class, and the mails distributed to the class at later times are determined as junk mails by a filtering system. The present invention can effectively identify the junk mail with a small amount of fingerprints, the maintenance cost is low, and the user privacy is not violated; the present invention has perfect performance in the execution efficiency and in the memory expenses, the present invention is used for filtering the junk mails under a great flow capacity environment, the problem that the junk mains occupy the network band width is abated, thus the utilization ratio of the network resources is improved, and simultaneously the filtration pressure of the client side is reduced.

The invention belongs to the polyester spinning field and relates to an 8-shaped hollow polyester fiber FDY (Fully Drawn Yarn) and a preparation method thereof. A spinning melt contains saturated fatty acid metal salt and modified polyester, wherein the mass ratio of saturated fatty acid metal salt to modified polyester is (0.0005-0.002) to 1; saturated fatty acid metal salt is fatty acid metal salt, the carbon atomic number is 12-22, the melting point is 100-180 DEG C, and the kinetic viscosity is less than or equal to 1Pa.s; a molecular chain of modified polyester comprises a terephthalic acid chain segment, a glycol chain segment and a rigid structure chain segment, and the molar ratio of the rigid structure chain segment to the terephthalic acid chain segment is (0.02-0.05) to 1; and the die swell ratio of the spinning melt is 1.23-1.33, and the after-filtration pressure during the spinning is 85-125kg/cm<2>. The prepared 8-shaped hollow polyester fiber FDY has relatively high degree of hollowness and relatively good shape-preserving effect.

The invention relates to a filtration method of real-time junk e-mails, and the method is used for filtering a junk e-mail at a network interconnection point. The method comprises the following steps: step one, a path combination P is constructed according to the routing information in the e-mail, and the path combination P is a sending correspondent and a receiving correspondent, and / or a sending correspondent and an information destination; step two, attribute space mapping is performed to the IP address or the domain name of the elements in the path combination P according to IP address mapping or domain name mapping; steps three, whether the current e-mail is a junk e-mail is determined according to the attribute space mapping result of each element in the path combination P, if the e-mail is a junk e-mail, step four is executed, otherwise, the current e-mail is not processed; step four, the current e-mail is filtered. In the invention, only the mail order and the content in the header are analyzed, the processing speed is quick, the network resource utilization rate can be improved, and simultaneously, the filtration pressure at a user terminal can be relieved.

The invention discloses a production process for preparing starch syrup from rice. The production process comprises the following steps: (1) crushing and pulping; (2) liquefying; (3) carrying out column laminar flow heat preservation and solid-liquid separation; (4) extracting a rice protein nitrogen source; (5) saccharifying; (6) carrying out solid-waste-free filtering; (7) carrying out mixed bed refining and concentrating. According to the process disclosed by the invention, in a process of preparing the starch syrup, the energy consumption is reduced through blending high-concentration starch syrup, a pulping water temperature is controlled and the liquefying time is shortened; residual sugar is recycled from sugar-free grains produced in a production process and fat in the sugar-free grains is hydrolyzed by adopting alkaline lipase; protein of the rice sugar-free grains is hydrolyzed by proteinase to prepare an organic nitrogen source, and fermentation raw materials for foods and medicines. The process disclosed by the invention is remarkably better than a traditional process for preparing the starch syrup from the rice; the production cost is low and an additional value of a product is improved; the content of produced solid wastes is extremely less and the production process is economical and environmentally friendly.

A filter bag assembly includes a first filter bag having at least two sidewalls of filter material extending from an open end to a closed end of the first filter bag at which the sidewalls connect to close the first filter bag. Two of the sidewalls of filter material are opposed to each other across the first filter bag and spaced from each other at the open end of the first filter bag. The two sidewalls are configured to form a tapered pocket, and the first filter bag includes a plurality of tapered pockets. A substantially rigid mesh is in contact with the first filter bag. The mesh is configured in a substantially V-shape and located near the open end of the first filter bag. The mesh is configured to maintain a shape of the tapered pockets and reduce filter pressure loss during use of the filter bag assembly.

The invention provides an anti-blockage oil filter. The anti-blockage oil filter comprises a shell, a bottom plate, a first filtering mechanism and a second filtering mechanism. A partition board divides an inner cavity of the shell into a first chamber and a second chamber. The first filtering mechanism is arranged in the first chamber. The first filtering mechanism comprises a first magnetic adsorption device and a first filter element. The second filtering mechanism is arranged in the second chamber. The second filtering mechanism comprises a second magnetic adsorption device and a second filter element. The anti-blockage oil filter adsorbs and filters out different sizes of metal impurities in engine oil through the first magnetic adsorption device and the second magnetic adsorption device so as to reduce the filter pressure of the first filter element and the second filter element, prolong the service cycle of the first filter element and the second filter element and improve the filtering effect of the first filter element and the second filter element. Metal impurities adsorbed by the first magnetic adsorption device can completely stay in a first filtering chamber. Metal impurities adsorbed by the second magnetic adsorption device can be adsorbed onto a second barrel and cannot go into a fourth filtering chamber and a second filtering chamber.

The invention discloses a water spray purifying system applied to industrial flue gas dedusting. The water spray purifying system applied to industrial flue gas dedusting comprises a machine body, a sprayer, a filtering screen, a flue gas charge pipeline, a drive mechanism, a temperature and pressure data acquiring device, a gas pressure regulating valve, an alarm, a laser transmitter 1, a laser transmitter 2, a sewage diversion baffle and a primary filtering device, wherein the top of the machine body is provided with a clean air discharge pipeline; the sprayer and the filtering screen are both arranged in the machine body; the flue gas charge pipeline is communicated with the side wall of the machine body; the drive mechanism is connected with the machine body and is used for controlling the filtering screen to drive; the temperature and pressure data acquiring device stretches into the machine body and is connected with a PLC; the gas pressure regulating valve, the alarm and the laser transmitter 1 are all connected with the PLC; the laser transmitter 2 is connected with the temperature and pressure data acquiring device and the PLC; the sewage diversion baffle is arranged in the machine body and is positioned below the filtering screen; the sprayer is positioned above the filtering screen; the sewage diversion baffle is of a slope structure, and the bottom of the slope is provided with a water drainage channel; light sources of the laser transmitters are directed to the temperature and pressure data acquiring device. The water spray purifying system applied to industrial flue gas dedusting is reasonable in design, is simple in structure, effectively enhances the flue gas purifying effect, and enhances the dedusting efficiency.

The invention relates to an antibacterial type PM2.5 (Particulate Matter2.5) filter material and application thereof. The antibacterial type PM2.5 filter material is mainly characterized by sequentially consisting of a windward layer, a primary filter layer, a sterilization layer, an active carbon filter layer and a fine filter layer, wherein the primary filter layer and the fine filter layer are nuclear pore films. The sterilization layer is provided with nano sliver particles; and the purpose of blocking PM 2.5 particles is effectively realized by utilizing the characteristics of uniform film hole diameter, uniform hole density and high porosity of the nuclear pore films and additionally arranging the sterilization layer through multi-layer filtration and adsorption effect; a filter element and a respirator, which are manufactured by the filter material, block the PM 2.5 particles more effectively in comparison with a conventional respirator, are long in service live, are good in gas permeability, meet characteristics of environmental-friendly requirements, and are worthy of being produced and popularized.

The invention belongs to the field of polyester spinning, and relates to a multilobal hollow polyester fiber FDY (fully drawn yarn) and a preparation method thereof. A spinning melt comprises a saturated fatty acid metal salt and modified polyester according to a mass ratio of (0.0005 to 0.002) to 1; the saturated fatty acid metal salt is a fatty acid metal salt with carbon atom number of 12 to 22, melting point of 100 to 180 DEG C, and dynamic viscosity less than or equal to 1Pa.s; a molecular chain of the modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment and a rigid structure chain segment, the molar ratio of the rigid structure chain segment to the terephthalic acid chain segment is (0.02 to 0.05) to 1, the extrusion swelling ratio of the spinning melt is 1.20 to 1.31, and the post-filtering pressure is 80 to 120kg/cm<2> during spinning. The prepared multilobal hollow polyester fiber FDY has higher hollow degree and a better shape preserving effect.

The invention discloses a rainwater channel sewage blocking screen for initial rainwater filtration. The screen comprises a rainwater channel of which the lower portion is communicated with a municipal pipe, a water inlet is formed in the upper end of the rainwater channel, a rainwater strainer is arranged in the water inlet in an erection mode, and the rainwater channel comprises a sundry area which is horizontally divided and communicated with the water inlet and a water purification area which is communicated with a municipal pipe; the sundry area is communicated with the upper end of the rainwater channel; the sundry area and the water purification area are communicated with one or more layers of separation filter screens which downwards incline vertically or toward the sundry area; the rainwater channel sewage blocking screen has the advantages that a filtering structure is automatically cleaned, and the water filtering rate and filtering effect of the filtering structure are guaranteed.

The invention discloses a preparation method for high purity fructooligosaccharides. The method comprises the steps that 1, inulase is utilized for hydrolyzing endives to obtain a primary fructooligosaccharides solution; 2, decoloration, debitterizing and desalination treatment are conducted on the primary fructooligosaccharides solution to obtain a secondary fructooligosaccharides solution; 3, beta-D-fructosyltransferase is added into the secondary fructooligosaccharides solution, reaction is conducted for 1-8 h under the condition of 20-35 DEG C, and a third fructooligosaccharides solution is obtained; 4, a nanofiltration membrane is used for processing the third fructooligosaccharides solution obtained in the step 3, percolate is collected, and the fructooligosaccharides with the purity greater than 99% is obtained. The fructooligosaccharides is high in purity and few in impurities, the content of the fructooligosaccharides is larger than 99%, and the high purity fructooligosaccharides has important industrial application prospect.

A countercurrent extraction apparatus comprises an extraction tube; a propeller is disposed within the extraction tube; the propeller comprises a shaft and blades. The apparatus is characterized in that the blades are sheet-shaped, and the blades are arranged at interval on the surface of the shaft along the axial direction and in spiral arrangement. The sheet-shaped blades arranged spaced axially and spirally play the role of advancing the materials; the materials under the effect of such blades churn and spread out, so as to play a role in stirring; the materials churn from one side to the other side with the rotation of the propeller; although part of the materials rotate with the blades in place, the materials do not accumulate to one side at the same time because of spaced blades; continuous closely packed body can not be formed, and journal sticking effect can be avoided, so that blockage does not form in the extraction tube. Several tests prove that even if the total volume of the materials is greater than 80% of the total volume of the extraction tube, blockage does not appear, so that the efficiency of the extraction tube plays to the maximum, and the cost performance has been significantly improved.

The invention provides a method for producing dacron FDY (Fully Drawn Yarn) filaments in large scale by utilizing recycled PET (Poly Ethylene Terephthalate) bottle chips. The method comprises the following steps: crushing recycled PET bottles into chips; cleaning and then drying; feeding the chips into a crystallizing bed so as to crystallize, and then drying; pouring the dried bottle chips into a screw extruder for performing fusion extrusion; causing the filtered flux to enter into a homogenizing kettle and performing condensation polymerization for 1.4-1.5 hours, thereby homogenizing the flux in the homogenizing kettle; causing the homogenized flux to enter into a spinning box; and spinning according to a high-speed spinning technology, thereby obtaining the dacron FDY filaments. A homogenizing step is added in the producing method, so that the problems of big viscosity fluctuation and inferior stability of the flux of the PET bottle chips are solved, and the continuous and large-scale production of the FDY filament products by taking the recycled PET bottle chips as raw materials is realized.

The invention discloses an automatic industrial flue gas purifying system. The automatic industrial flue gas purifying system comprises a body, and the top of the body is equipped with clean air discharging pipe. The automatic industrial flue gas purifying system comprises a spray thrower and a filtering screen, and the spray thrower and the filtering screen are arranged in the body. The automatic industrial flue gas purifying system comprises a flue gas input pipe communicated with the side wall of the body, a transmission mechanism connected with the body and used for controlling rotation of the filtering screen, a temperature and pressure data collection device extending into the body and connected with a PLC controller, a gas pressure regulating valve, a liquid flow control system and a laser emitter. The gas pressure regulating valve, the liquid flow control system and the laser emitter are connected with the PLC controller. The automatic industrial flue gas purifying system also comprises a spray water box connected with the liquid flow control system, a laser emitter connected with the temperature and pressure data collection device and the PLC controller, a sewage drainage separation plate arranged inside the body and located under the filtering screen and a primary filtering device. The automatic industrial flue gas purifying system is reasonable in design, is simple in structure, improves flue gas purifying effects effectively and raises the dedusting efficiency.

The invention provides an anti-blockage engine oil filter for an automobile. The anti-blockage engine oil filter comprises a shell, a bottom plate and a transverse partition plate. The transverse partition plate is arranged in the shell and divides the interior of the shell into a first filtering cavity and a second filtering cavity. The transverse partition plate is provided with a first oil conducting port communicating with the first filtering cavity and the second filtering cavity, and a plurality of first through holes communicating with the first filtering cavity and the second filtering cavity. A first filter element is arranged in the first filtering cavity, an annular containing cavity is formed in a second barrel of the first filter element, and the annular containing cavity is filled with metal impurity adsorption materials. The second filtering cavity is internally provided with a second filter element, a bypass valve is arranged on a second end cover of the second filter element, an inlet of the bypass valve communicates with the second filtering cavity, and an outlet of the bypass valve communicates with an inner cavity of a third barrel. According to the anti-blockage engine oil filter, the metal impurity adsorption materials are used for adsorbing and filtering out large-particle metal impurities in engine oil, the filtering pressure of filter paper is reduced, the using cycle of the second filter element is prolonged, and the filtering effect of the second filter element is improved.

The invention discloses an MBBR (Moving Bed Biofilm Reactor) sewage treatment system and a treatment process and belongs to the technical field of sewage treatment. The problems in the prior art thata treatment process of the traditional sewage treatment plant is long in procedure, low in integration level, low in load, high in carbon source requirement and common in effect of removing nitrogen,phosphorus and SS are solved. The sewage treatment system comprises an anaerobic zone, an anoxic zone I, an anoxic zone II, a flocculation zone, a settling zone, a biofilm zone, an effluent zone and pipelines for connecting the zones. According to operations of adjusting reflux, controlling the sludge concentration, setting parameters of the suspended carrier filling rate in the biofilm zone and DO, setting the membrane flux of a membrane assembly in the effluent zone and aeration density and the like, by utilizing the characteristic of denitrifying phosphate-accumulating organisms, the settling zone is arranged on a middle section of biochemical treatment, the biofilm process is coupled to the denitrification filter process, and the sewage treatment system disclosed by the invention has the advantages of being high in integration level, capable of synchronously removing nitrogen and phosphorus and saving the carbon source, low in concentration of the nitrogen, phosphorus and SS in theeffluent, high in load and long in equipment service life.