76results about How to "Large amount of filtration" patented technology

The present invention relates to a zirconium oxide foamed ceramic filter. It is made up by adopting the following steps: using zirconium oxide, aluminium oxide, calcium oxide and yttrium oxide to form ceramic powder, adding methyl cellulose, polyvinyl alcohol and water to prepare slurry, using soft polyurethane foamed plastics as carrier, impregnating said carrier with said slurry, extruding to obtain blank material, drying and sintering so as to obtain the invented zirconium oxide foamed ceramic filter. The invented foamed ceramic filter has good high-temperature stability and thermal shocking resistance in the high-temperature molten steel, does not contaminate alloy and can obtain good filtering purification effect.

The invention relates to a magnesia foam ceramic filter with special high-temperature chemical stability, which is composed of magnesia, boron The high-quality polyurethane foam is used as the carrier, impregnated with the above slurry, extruded to form a billet, dried and sintered to obtain a magnesia foam ceramic filter. The ceramic foam filter of the present invention has good high-temperature stability in the magnesium alloy melt, does not pollute the alloy, has good filtration and adsorption capacity for oxidation inclusions and flux inclusions in the magnesium alloy melt, and has a good filtration and purification effect and is heat-resistant. Small capacity, no need to preheat when using, small fluid resistance, large filtration capacity, through the filtration and purification test of metal magnesium and magnesium alloy melt, all performances are good.

The present invention relates to an aluminium oxide foamed ceramic filter with special high-temperature chemical stability. Said aluminium oxide foamed ceramic filter is made up by adopting the following steps: using magnesium oxide, boron carbide and boron trioxide to form ceramic powder, then adding methyl cellulose and water to prepare slurry, using soft polyurethane foamed plastics as carrier, impregnating said carrier with said slurry, extruding to make blank material, drying and sintering so as to obtain the invented magnesium oxide foamed ceramic filter. The invented foamed ceramic filter has good high-temperature stability in the molten magnesium alloy, does not contaminate alloy and possesses good filtering and adsorption efficiency for removing oxide impurity and flux impurity form molten magnesium alloy, so that its filtering purification effect is good.

The invention relates to an application of lycium ruthenicum anthocyanin in preparation of a cosmetic and the cosmetic containing the lycium ruthenicum anthocyanin. The cosmetic contains 0.1%-5% of lycium ruthenicum anthocyanin. The application of the lycium ruthenicum anthocyanin in preparation of the cosmetic mainly relates to an essence and essence milk. An extraction technology of the lycium ruthenicum anthocyanin comprises the following steps: with fresh lycium ruthenicum anthocyanin fruits as a raw material, extracting, purifying and drying to obtain red lycium ruthenicum anthocyanin powder. A skincare product provided by the invention contains the lycium ruthenicum anthocyanin and has a good anti-aging effect; the skin vitality is fully improved; the phenomenon of skin dehydration is improved; thin veins are relieved; the skin is smooth, glossy and full of vitality; the lycium ruthenicum anthocyanin provided by the invention is low in extraction cost and short in extraction time; and the product purity can be 60%-99%.

The invention discloses a spinning technique used for producing viscose artificial fiber of deformed and flat monofilament in the spinning field. The procedures of spinning technique comprises the processes of gel-supplying, metering, filtrating, spinning, solidification bath, drafting, deacidification, strand silk forming; in the process of drafting, strand silk is directly drafted from a nozzle to a drafting roll assembly which comprises at least two couples of drafting rolls with different diameters; linear speed difference of the drafting rolls generates drafting force for drafting the strand silk; in the process of deacidification, the strand silk falls into a deacidification trough from the drafting rolls for deacidification by a mode of soaking and washing; in the process of forming strand silk, a wring-loading style winding mechanism is adopted for winding the strand silk. The technique is applicable to the production of deformed and flat monofilament which substitutes the synthesized fiber material that is hard for natural degradation, and meets requirements of using green, environment friendly material in domestic and foreign package material, artware and clothing decoration fields, etc. The technique is also applicable to the production of other deformed monofilament, conventional monofilament and multifilament products.

The invention discloses an automatic continuous filter, comprising a bracket, a sample storage bottle, a filtrate collecting bottle, a plurality of filtering plates provided with filtering membranes, a filtrate collecting device and a control system, wherein the sample storage bottle can be connected to inlets of the filtering plates in a sealing manner through a sample conveying pipeline; a plurality of filtering plates are detachable and annularly arrayed on the filtrate collecting device, the filtrate collecting device is rotatably arranged on the bracket and is connected to the filtrate collecting bottle through a filtrate conveying pipeline; the control system comprises a valve for controlling the opening and the closing of the sample conveying pipeline, a pressure sensor for detecting the pressure of samples in the sample conveying pipeline, a pipeline drive device for controlling the sample conveying pipeline to be disengaged from and connected, in a sealing manner, with the inlets of the filtering plates, and a controller for controlling the operating time sequences of the valve and the pipeline drive device according to the data of the pressure sensor; and the valve is an electromagnetic valve arranged on the sample conveying pipeline, and the valve and the pressure sensor are electrically connected to the controller. The automatic continuous filter can realize continuous filtering.

The invention aims at providing an air haze purifier which is simple in structure and convenient to mount, use and maintain. The air haze purifier comprises an air inlet pipeline, a purification basin and an air outlet pipeline sequentially along the air flow direction, wherein the air inlet pipeline is communicated with the purification basin; the purification basin comprises a purification basin body for containing purification liquid; an air purification pipeline is arranged in the purification basin and is communicated with the air inlet pipeline; an air exhaust opening formed below the liquid level set in the purification basin body is formed in the air purification pipeline; the purification basin is provided with a purified air outlet; the purified air outlet is formed above the liquid level set in the purification basin body; the air outlet pipeline is communicated with the purified air outlet.

The invention discloses a preparation method of a polyetherimide (PEI) photocatalytic ultrafiltration membrane loaded with a titanium dioxide nanowire on a surface. The method comprises the followingsteps: 1) preparing PEI membrane making liquid: uniformly dissolving PEI and P25 into an NMP solution; 2) performing rotary coating and rubber rejection: making the membrane making liquid into a PEI / P25 composite membrane, and soaking a glass plate on which the membrane making liquid is poured into deionized water; 3) performing surface roughness treatment on the PEI / P25 membrane; 4) preparing hydrogen peroxide reaction liquid; 5) soaking the PEI / P25 composite membrane into the hydrogen peroxide reaction liquid to generate and cover a hydrogen titanate nanowire on the surface; 6) soaking the PEI / P25 membrane covered with the hydrogen titanate nanowire on the surface into hot water, converting and crystallizing the hydrogen titanate nanowire into titanium dioxide, and taking out and washingtitanium dioxide by using water. According to the preparation method disclosed by the invention, through a low-temperature crystallization technique, a titanium dioxide nanowire is grown on the surface of the PEI membrane, so that the hydrophilicity of the membrane is improved, and the membrane flux is improved while high truncation ratio is maintained at the same time. The membrane can be applied to the fields of photocatalytic pollution treatment and the like.

The invention discloses a spiral plate type filter system and method. The filter system comprises a spiral plate filter core, a check valve, a filter shell, a controller, a pure water electromagnetic valve, an unfiltered water electromagnetic valve, a sewage disposal electromagnetic valve, a backwash electromagnetic valve and an air pump; the controller is connected with the pure water electromagnetic valve, the unfiltered water electromagnetic valve, the sewage disposal electromagnetic valve, the backwash electromagnetic valve and the air pump; the unfiltered water electromagnetic valve and the backwash electromagnetic valve are connected with the air pump. According to the spiral plate type filter system and method, the material roles that a metal film filter can be conveniently welded and randomly bent and is high in filter precision are fully played; the filter system is simple in processing technology, capable of easily achieving automatic process production, high in processing efficiency and low in processing cost; the filter is high in strength, suitable for being used in a large-differential-pressure or high-temperature environment, high in unit volume filter efficiency and large in filter amount, and only accounts for one fifth of the size of a common multi-pipe filter for achieving the same filter amount.

Provided is a method for preparing floamed ceramics filtrating piece for purifying magnesium and magnesium alloy fused mass, where a polyurethane foam is used as a formwork and is preprocessed firstly, polyvinyl butyral is added into a absolute ethyl alcohol solution based on a mass concentration of 1 to 10% to ball mill and dissolve, bitter earth is then added into the solution to ball mill to obtain non-water-based ceramic slurry, wherein the proportion by weight of the bitter earth and the polyvinyl butyral absolute ethyl alcohol solution is 60-90:10-40; the formwork is immerged in the slurry to ensure the slurry be filled into the foam, jostling slurry and natural drying; then mucosity slurry and swinging slurry centrifugally, repeat to mucosity slurry and swing the slurry to dry naturally; then placing the foam in a ceramic sagger laid with flame-proof powder, elevating the temperature to 1000 to 1200 DEG C at a speed of 0.5-2 DEG C / min, heat preserving for 5 to 10 hours, and drawing a charge after air cooling. The present invention has well thermal shock resistance, thermal epistasis and dimension heat endurance, framework surface finish quality is high, filtrating and adsorption capacity is well, the porosity is near of polyurethane foam, the resistance force to magnesium alloy fused mass is small, the filter capacity is large and pollution will not be caused to alloy.

The invention relates to the technical field of haze-proof articles and provides an external ventilation type haze-proof mask with a large ventilation section. The external ventilation type haze-proof mask comprises a breathing mask main body, a first air filtering module and a second air filtering module, wherein the breathing mask main body is provided with a breathing cavity; an air outlet of the first air filtering module is communicated with an air inlet of a left inhaling channel through a first hose; the air outlet of the second air filtering module is communicated with the air inlet of a right inhaling channel through a second hose; the air outlet of the left inhaling channel and the air outlet of the right inhaling channel are communicated with the breathing cavity through inhaling check valves respectively; and an exhaling channel is communicated with the breathing cavity through an exhaling check valve. The external ventilation type haze-proof mask with a large ventilation section is reasonable and compact in structure; the special modules are used for filtering air; the first air filtering module and the second air filtering module are fitted to cheek parts of a human body respectively; the external ventilation type haze-proof mask is comfort to wear, the ventilation section is greatly enlarged, the air filtering quantity is large and the breathing resistance is small; and the external ventilation type haze-proof mask is suitable for wearing outdoors for long time, and has the characteristics of safety, labor saving, simplicity and convenience and high efficiency.

The invention relates to a zirconia foam ceramic filter, which is composed of zirconia, alumina, calcium oxide and yttrium oxide to form ceramic powder, and then adds methyl cellulose, polyvinyl alcohol and water to prepare slurry, and uses flexible polyurethane foam The plastic is used as a carrier, and the slurry is impregnated, extruded to form a billet, dried and sintered to obtain a zirconia foam ceramic filter. The foamed ceramic filter of the invention has good high temperature stability and thermal shock resistance in high temperature cast steel melt, can avoid breakage caused by mechanical shock and thermal shock during use, does not pollute the alloy, and has no effect on metal melting. Oxidation inclusions and flux inclusions in the liquid have good filtration and adsorption capacity, good filtering and purification effect, small heat capacity, no need to preheat during use, small fluid resistance, and large filtration capacity. Purification test, the performance is good.

The invention relates to a multiphase nitride combined silicon carbide ceramic foam filter and a preparation method thereof, and belongs to the technical field of refractory materials. The preparation method is realized in a way as follows: preparing slurry from silicon, silicon carbide, silicon dioxide, ball clay, admixtures and water; soaking the slurry by using soft polyurethane foam as the carrier to prepare a blank; and drying, and sintering at 1400-1500 DEG C in the nitrogen atmosphere to obtain the multiphase nitride combined silicon carbide ceramic foam filter. The ceramic foam filterof the invention has favorable high temperature stability in ferric and copper solutions, does not pollute alloys, has the open-cell rate of 80-90%, has favorable filtration and adsorption capacitieson oxide inclusions and flux inclusions, and has the advantages of high filter capacity, favorable filtration and purifying effect, small hot melt and high thermal shock stability; the compression strength at normal temperature is not lower than 2.3 MPa; the ceramic foam filter can be cooled by water at 1100-20 DEG C for more than 23 times, and does not need preheating in use; and the highest service temperature is 1550 DEG C.

The invention relates to a multistage self-cleaning liquor separation purifier. On the basis of a currently used liquid separator, a reciprocating rotary motor, a rotating shaft, a transmission gear, a lower rotary disc and a ring-shaped cleaning pipe are designed, the reciprocating rotary motor can be used for screwing down or screwing off a separating medium, and the separating medium is repeatedly wound closely and loosened as well as is cleaned by the ring-shaped cleaning pipe through spray rinsing, so that the separating medium with the reduced efficiency can be cleaned again; filter cartridges capable of working in multiple stages are arranged, so that the normal production can be guaranteed even if the efficiency of one filter cartridge is reduced, and the filtration yield is increased; furthermore, the device is not required to be disassembled and maintained in the whole process, and the work is automatically completed in the device.

The invention relates to a method for producing heavy-denier mucilage glue flat yarn. The method includes the steps that mucilage glue is pumped into a candle type filter through a metering pump to be filtered, the filtered mucilage glue enters a yarn spraying nozzle through a goose neck to be sprayed into yarn, sprayed yarn enters a primary coagulating bath groove to undergo primary solidification forming, then, the yarn is guided to a secondary solidification forming groove through a yarn guiding mechanism to undergo secondary solidification forming, the yarn enters a washing groove to undergo primary washing after the secondary solidification forming is conducted, the yarn is laid on a conveying net of a united refiner in parallel to undergo regeneration, washing, desulfuration, blanching, pH value adjustment, oiling and drying after the primary washing is conducted, finally, the yarn is formed to be in a cylinder shape or a strand shape, and carbon disulfide is recycled in the primary solidification forming process and the secondary solidification forming process of the yarn. The carbon disulfide is recycled, the strength and the elongation of the heavy-denier mucilage glue flat yarn produced through the process completely meet the requirements, and the method is quite beneficial for development of downstream markets.

The invention provides a water storing type breathing protecting device. The device comprises a mask, an air feeding tube, a filtering container, a liquid storing container, a carbon box and a hose. The device is characterized in that the filtering container is positioned in a filtering box; an adapter joint integrated with the air feeding tube is assembled on an opening of the filtering container; a filter head positioned in the filtering container is fixed at the bottom part of the air feeding tube; a plurality of inclined air outlets are circumferentially formed in the upper edge of the filter head; the other end of the adapter joint is limited into the box body through a bearing; the adapter joint is communicated with the air feeding end of the carbon box; the other end of the carbon box is communicated with the air feeding end of an air blower in the filtering box; the exhaust end of the air blower is communicated with an air discharging tube; a hose joint is arranged at the upper end of the air discharging tube and connected with the mask through the hose. The device can completely solve the problems of inconvenient wearing, easy falling down, difficult cleaning of a filter net, poor filtering effect and unsmooth breathing of the existing water storing type filtering mask; the device has the advantages of being simple in structure, easy to be cleaned, and convenient to use.

The invention discloses a multi-core filtering device, which comprises a barrel, wherein the top of the barrel is provided with a barrel cover; a liquid outlet channel transversally penetrates through the upper part of the barrel; a liquid outlet of the liquid outlet channel is fixedly sealed on the barrel; a plurality of filter elements are communicated with the liquid outlet channel through flanges; the lower part of the barrel is provided with a liquid inlet; and the bottom of the barrel is provided with a slag hole. The multi-core filtering device has high filtering capacity, and the filter elements are convenient to detach and replace and can be repeatedly regenerated; the filtering precision is high, particles do not drop, and secondary pollution of the stock solution is avoided; and moreover, sealed filtering is realized, the production is safe, and odor does not overflow.

The invention discloses a filter membrane assembly and collector for DNA enrichment in water environment and an application method, and belongs to the technical field of environmental DNA detection. The filter membrane assembly includes at least two layers of filter membranes stacked in sequence from top to bottom, the filter pore size of each layer of the filter membrane is arbitrarily selectively reduced linearly or stepwise; and a certain gap is maintained between two upper-lower adjacent layers of filter membranes, and filter holes between the two adjacent layers of the filter membranes are arranged in a staggered manner. By using the filter membrane assembly for DNA enrichment in the water environment, gradient filtration of biological samples in water samples can be achieved, clogging of the filter membranes is avoided, the filtration capacity of the filter membranes is increased, the filtration flux and filtration efficiency of the water samples are increased, and the subsequentDNA extraction efficiency can further be improved.

The invention relates to the technical field of production of power lithium ion batteries, and particularly discloses a slurry filtration system used for a power lithium ion battery of HEV / PHEV. The system comprises a slurry flowing pipeline, a plurality of filters connected in series are arranged in the slurry flowing pipeline, the filters are in sequential connection according to a descending order of filter pore sizes, and a slurry flowing direction is formed; and the interior of each filter is provided with one screen or two or more parallel screens, a depth-type filter group is connectedin series with the tail end of the slurry flowing direction, the interior of the depth-type filter group is provided with a plurality of parallel filter elements, and the filter pore size of each filter element is smaller than the filter pore size of the screen. The system provided by the invention filters slurry until the particle size of the slurry is in a suitable range in a classified filtration manner, so that clogging of the screen is effectively avoided, the filtration process has high stability, and requirements for particle miniaturization of the slurry used for the lithium ion battery of the HEV or the HPEV are met; and filter screens with any specifications can adopted for free combination, which is flexible and convenient, and the system is convenient to assemble and disassemble, and convenient for large-scale production.

The invention relates to the technical field of food processing, in particular to a filtering device for efficient deep-frying equipment. The filtering device comprises a plurality of filtering containers in parallel, a filtering device arranged in each filtering container, a vacuum pump and a recovery container, wherein each filtering device comprises a multi-stage filtering net, and the filtering containers in parallel are connected with an oil inlet pipeline, an oil outlet pipeline, a recovery pipeline and a vacuumizing pipeline. The multi-stage filtering net can trap food oddments mixed todeep-frying oil in different filtering nets, the filtering capacity is improved, besides, the filtering nets can also be prevented from being blocked, after filtration is completed, the deep-frying oil adhered to the food oddments is converged into the recovery container under the action of pressure differences, and besides, the filtering nets can be cleaned to a certain extent. The filtering device is simple in structure, and can effectively prevent the filtering nets from being blocked. Besides, the labor force and the time cost for cleaning are greatly reduced, high recovery rate of the deep-frying oil can be realized, and fine production is facilitated.

The invention provides a device for old garbage classification in water. The device comprises a garbage precession device and a collection bin positioned below the garbage precession device, wherein the garbage precession device is arranged in a water tank used for garbage treatment, and comprises a hollow horizontal tank structure and a power mechanism used for driving the horizontal tank structure to rotate; a propeller is arranged inside the horizontal tank structure along the length direction; a feeding port and a discharging port are respectively formed in the two ends of the horizontal tank structure; and a plurality of screen holes are uniformly formed in the side wall of the horizontal tank structure. The device provided by the invention is applicable to a method for old garbage treatment in water, has the advantages of being high in filtering capacity, convenient to operate, reliable in working, safe, environmentally friendly and the like, has certain progressiveness and practicability, and has great popularization and application values.

The invention provides a filter membrane assembly and a filter device with the same. The filter membrane assembly comprises at least two filter membranes which are arranged by successive and upward-and-downward lamination; the pore diameter of each filter pore of the upper filter membrane is larger than the pore diameter of each filter pore of the lower filter membrane; and the pore diameter of each filter pore of the lower filter membrane is 0.45 [mu]m. The filter membrane assembly provided by the invention solves the problem that the content of a suspended solid in water can not be accurately detected by a filter membrane in the prior art.

The invention discloses a sea water desalting device having the advantages of low energy consumption, low cost and high efficiency, high-pressure filtration can be performed, and the sea water filtration capacity in unit time is large. The sea water desalting device includes a sea water reservoir, a sea water filter tank and a fresh water reservoir; the sea water reservoir is arranged above the sea water filter tank and communicates with the sea water filter tank through a water inlet valve; the fresh water reservoir is arranged below the sea water filter tank; the sea water filter tank has an inverted triangle structure, and one inclined plane is provided with intensive water leaking holes and is laid with a graphene filter layer; the graphene filter layer is provided with a quartz plate with intensive water leaking holes in a stacking manner; the quartz plate and the inclined plane tightly clamp the graphene filter layer; the bottom of the sea water filter tank is provided with a draining port; the water inlet valve is opened, sea water enters the sea water filter tank, under the action of the pressure, fresh water in the sea water successively passes through the quartz plate, penetrates the graphene filter layer, is filtered out and falls into the fresh water reservoir at the below side through the water leaking holes in the inclined plane, and residues on the graphene filter layer is discharged through the draining port.

The invention relates to a silicon carbide foam ceramic filter, which is composed of silicon carbide, aluminum oxide, silicon dioxide and talc as ceramic powder, and then adding carboxymethyl cellulose, polyvinyl alcohol, silica sol and water to prepare a slurry. The soft polyurethane foam is used as a carrier, impregnated with the above slurry, extruded to form a billet, dried and sintered to obtain a silicon carbide foam ceramic filter. The ceramic foam filter of the present invention has good high-temperature stability in molten iron and copper, does not pollute alloys, has good filtering and adsorption capacity for oxidized inclusions and flux inclusions in molten metals, and has good filtration and purification effects, and is heat-resistant Small capacity, no need to preheat when using, small resistance to fluid, large filtration capacity, and good performance in filtration and purification tests of iron and iron alloy melts.

The invention relates to a water filtration device for local disinfection of daily water and / or drinking water. The water filtration device includes a filter housing (10) provided with an inlet connector (11) and an outlet connector (12). , several capillary membranes (20) are provided in the filter housing (10), the first end (21) of the capillary membrane is open, and the other end (22) is closed, and the capillary membrane (20) The first end (21) is molded into a membrane holder which closes the space between the capillary membrane (20) and the filter housing. The membrane is a microfiltration or ultrafiltration membrane with an asymmetric pore structure. The pore structure is asymmetric, and the diameter of the pores gradually decreases across the membrane wall along the flow direction of the liquid. The membrane is made of polyethersulfone / polyvinylpyrrolidone polymer (PES / PVP polymer). Depending on the actual application, the minimum diameter of a hole with an asymmetric structure on one side is 0.01 to 0.3 μm.

The invention relates to an oscillating cleaning device used for cleaning the filter cloth of a rotating disk filter. The oscillating cleaning device comprises a filter frame and a filter disk installed in the filter frame, wherein a speed reducer is mounted at the left side of the upper end of the filter frame, the output shaft of the speed reducer is provided with a sprocket wheel I, the sprocket wheel I is connected with a sprocket wheel II through a chain, the sprocket wheel II is mounted on the left end of the filter disk, the front end of the output shaft of the speed reducer is provided with a cam, the side edge of the filter disk is provided with a water supply main which is mounted on the filter frame and connected with a water inlet pipe, the water supply main is provided with a plurality of water supply manifolds, the other ends of the water supply manifolds are provided with spray pipes, the left end of the water supply main is provided with a rotating guide rod, and the other end of the rotating guide rod is in lap joint with the cam. According to the invention, through adoption of a cam structure, nozzles can swing up and down, thereby totally covering the filter cloth during cleaning of the filter cloth, so the filter cloth can be cleaned; and thus, the filtration capacity of the filter cloth is improved, the replacing cycle of the filter cloth is reduced, and water consumption in cleaning is decreased.

The invention provides a novel filter assembly comprising a flange, an oil pipe and a filter screen in press fit with the oil pipe, wherein the press fit part of the oil pipe and the filter screen is noncircular. The invention can avoid the rotating and the falling off of the filter screen rotates under then condition that installing is not influenced.

The invention relates to a dry-process alkali refining agent of edible oil and preparation and use methods for the dry-process alkali refining agent. The dry-process alkali refining agent of edible oil is prepared through modifying silicon dioxide, Al2O3, Fe2O3 and water-soluble alkali, which serve as raw materials, with a di-oxidating agent and then mixing the modified materials with other raw materials. The dry-process alkali refining agent of edible oil and the preparation and use methods for the dry-process alkali refining agent have the beneficial effects that the dry-process alkali refining agent of edible oil, disclosed by the invention, is mainly applied to deacidification of refined salad oil and paste cooking oil and more applicable to deacidification of fats and oils with high acid number; the dry-process alkali refining agent is more environmentally friendly and more energy-saving; the dry-process alkali refining agent has the characteristics that no sewage is drained, newpollution to environments cannot be caused, the oil loss is low, the energy consumption is low, a water washing procedure during application operation is saved, the production process is simplified, the operation is facilitated, and the like; and by applying the dry-process alkali refining agent of edible oil, disclosed by the invention, the quality of the edible oil can be improved obviously.

The invention relates to the technical field of ammonium phosphate slurry filtration, in particular to an ammonium phosphate slurry filtering device and a cleaning method thereof. The filtering device comprises a cylinder, a porous pipe plate, a filter bag, a filtrate removal notch, an ammonium phosphate slurry inlet and an aeration hole; the porous pipe plate is arranged inside the cylinder, and pores in the porous pipe plate are communicated with a bag mouth of the filter bag; the filtrate removal notch is formed in the side wall, close to the top, of the cylinder; the ammonium phosphate slurry inlet and the aeration hole are respectively formed in the side wall, close to the bottom, of the cylinder, so that the filtration amount of ammonium phosphate slurry is large, the filtering effect is higher, the energy consumption is low, and the operation and maintenance cost is lower; through aeration and cleaning with a sodium hydroxide solution, a residue layer attached onto the outer surface of the filter bag is loose, the cleaning difficulty is lower, the cleaning period is shortened, and the service life of equipment is prolonged.

The invention discloses bag type filtering equipment and a using method thereof. The equipment comprises a support, a water inlet in the upper end of the support, a motor, a scraper, a fixing shaft onthe right side of the scraper, a plurality of springs on the scraper, a plurality of gears fixed to the support, fixing shaft rods distributed on the upper side and the lower side of a filter screen,a 200-mesh modular filter screen with the mesh number capable of being changed, a 400-mesh modular filter screen, a 600-mesh modular filter screen, chains embedded in the filter screens and having the same number as the gears, modular water baffles distributed on the two sides of the filter screens, filter screen guide grooves distributed in the upper sides and the lower sides of the filter screens, and a water outlet in the lower end of the support. Compared with the prior art, the bag type filtering equipment has the advantages of continuous filtration, large filtration capacity, low cost,simplicity in operation and zero emission.