30results about How to "Improve filter and dust removal effect" patented technology

The invention relates to a composite filter cloth equipped with a filter membrane. The composite filter cloth is composed of a filter cloth and a filter membrane. The filter cloth includes a glass fiber filter cloth, a polytetrafluoroethylene filter cloth or basalt filter cloth, the surface of the filter cloth is provided with the filter membrane, the filter membrane includes a polyvinyl fluoride filter membrane, and the filter cloth and the filter membrane form an overall structure through bonding or hot pressing compounding. The filter cloth also includes a filter cloth formed by blending of glass fiber and polytetrafluoroethylene fiber or basalt fiber and polytetrafluoroethylene fiber. The composite filter cloth consists of two layers of filter cloth, and the filter membrane is arranged between the two layers of filter cloth, wherein at least one layer of the filter cloth is provided with the filter membrane on the external surface. Compared with the prior art, the filter cloth and the filter membrane are compounded to form the multilayer composite filter cloth, which not only can filter out dust particles with a diameter of less than 2 micrometres, but also enhances the strength of traditional filter cloths and filter membranes, thus being applicable in industrial dust removal equipment for a long term. The composite filter cloth equipped with a filter membrane provided by the invention ahs long service life and good dust filtration effect.

The invention relates to a filtering dustproof device of a computer chassis, comprising a chassis side plate, an exhaust fan, a shell, an upper cover and a lower cover. The upper cover and the lower cover are fixed by screws to form a shell; the shell is internally provided with an air passage; air inlet holes are arranged on the periphery of the upper cover; the lower cover is respectively provided with a central circular groove, an internal annular groove and an external annular groove; and the central circular groove, the internal annular groove and the external annular groove are all internally provided with air filtering sponges. By adopting trebling air filtering combined with the exhaust fan turbo-type air exhaust and supply, the invention effectively solves the problem of air purification in the computer chassis so as to prevent harmful dust from corroding computer electronic elements and prolong the service life of the computer. Besides, the structure is convenient to assemble and disassemble and is convenient for the cleaning and changing of filtering sponge.

The invention discloses a water curtain dust removing mechanism applicable to a coating machine, which comprises a casing (10). An atomization spraying head (5) is installed at the position of an upper inlet (13) in the casing (10), a gas pipe (6) is installed in the casing (10) and close to the position below the atomization spraying head, a water-gas separation device (7) is installed at the position of an outlet of the gas pipe (6) and in the casing (10), and a pools zone (9) is located at the bottom of the casing (10). The gas pipe (6) is a venturi pipe. The water curtain dust removing mechanism is good in dust filtering effect, simple in operation, convenient in replacement, low in labor strength, high in work efficiency and capable of effectively ensuring gas handling capacity and negative pressure in a coating pan.

The invention discloses novel textile fabric automatic dust removal equipment. The equipment comprises a bottom plate and a box body, a plurality of universal wheels are arranged on the periphery of the bottom of the bottom plate, retractable supporting legs are arranged in the middle of the bottom of the bottom plate, and the box body is fixedly arranged on the upper portion of the bottom plate;a push handle is arranged on the upper portion of the left side of the box body, and an air suction cover is arranged on the right side on the upper portion of the box body; the left end of the air suction cover is fixedly arranged on the right side of the top of the box body through a fixing base, and the left end of the air suction cover is communicated with a suction fan; the right end of the suction fan is communicated with a fabric filtering device, and a partition plate is arranged in the middle of the interior of the box body; the left side of the upper portion of the partition plate iscommunicated with a dust filtering box, and a plurality of water sprayers are arranged on the upper portion in the dust filtering box; the upper left end of the dust filtering box is communicated with the fabric filtering device through an air guide pipe, and the right end of the dust filtering box is communicated with a drying and filtering device. The product is simple in structure, high in practicability, high in safety, convenient to use, good in filtering and dust removing effect and beneficial to application.

The invention relates to the technical field of automobile baking finish and provides an automobile baking finish house. A baking finish operation space is formed in a house body of the automobile baking finish house. The house body is provided with an air inlet and an air outlet. A temperature control mechanism is installed in an air supply cavity. A first filtering device is arranged in a first filtering cavity. An air supply fan communicates with the first filtering cavity. A filtering hole plate, a second filtering device and a grating plate are arranged in the baking finish operation space. A static pressure chamber is formed between the second filtering device and a top plate of the house body. An automobile operation space is formed between the second filtering device and the grating plate. A waste gas channel is formed between the grating plate and a bottom plate of the house body. A precipitation cavity communicates with the waste gas channel. A third filtering device is arranged in the precipitation cavity. An exhaust cavity communicates with an air outlet of an exhaust fan. A fourth filtering device is arranged in the exhaust cavity. Air in the exhaust cavity is discharged to the air outlet after passing the fourth filtering device. The automobile baking finish house provides stable and clean airflow for automobile baking finish, the paint spraying effect can be improved, waste gas is subjected to dust removal and filtering treatment, and environmental protection reaches the standard.

The invention discloses an integral welded-type vertical multi-filter drum dust remover. The dust remover comprises a rack and a dust removing box, wherein the dust removing box is disposed on the rack and is provided with a dust inlet and an air outlet. A back flushing control device which acts on filter drums to blow off dust accumulated on the surfaces of the filter drums is disposed in the dust removing box. The back flushing control device comprises a gas storing bag disposed outside the dust removing box, a high-pressure air injection pipe extending into the filter drums, and a magnetic valve controlling gas fluid on-off. The high-pressure air injection pipe is connected to the air storing bag through the magnetic valve. The filter drums are arranged from the center of the smoke and dust filtration area to the outside in a radiation shape. The central axes of the filter drums are parallel to the axis of rotation of the smoke and dust filtration area. The plurality of the filter drums are disposed vertically in a multi-layer manner, thus enhancing the filtration and dust removing effects largely.

The invention relates to a clutch control mechanism for automobile transmission, in particularly to a clutch assisting device. The clutch assisting device comprises an air cylinder, a push rod and a dustproof cover; one end of the dustproof cover is in sealing connection with the push rod; the other end of the dustproof cover is in sealing connection with a front cover plate of the air cylinder; the dustproof cover is in a full-sealing structure; the front cover plate of the air cylinder is provided with a ventilation pipe; the ventilation pipe is in a reversed L shape; one end of the ventilation pipe is communicated with the air cylinder; the other end of the ventilation pipe is communicated with the exterior; a connecting end of the ventilation pipe and the air cylinder is higher than that of the ventilation pipe and the exterior; an air filtration device is arranged inside the ventilation pipe. According to the technical scheme of the clutch assisting device, the structure is simple, the dustproof effect is good, the service life of the clutch is prolonged, and convenience is brought to a user.

The invention belongs to the technical field of needle felts, and in particular relates to a high performance PTFE coated needle felt and a preparation method thereof, and the high performance PTFE coated needle felt comprises a PTFE mesh base layer, heat insulating cotton layers disposed on both sides of the PTFE mesh base layer, and PTFE coating layers disposed on the heat insulating cotton layers, wherein each PTFE coating layer is provided with a heat dissipating copper plate, the heat dissipating copper plate is interspersed with connecting iron strips, the connecting iron strips pass through the PTFE mesh base layer and the heat insulating copper layers, the heat dissipating copper plate is provided with a magnetic fixing unit for fixing the connecting iron strips by magnetic attraction, and the PTFE coating layers are further provided with heat sink units. The connecting iron strips have high connection strength between the layers of the needle felt, the magnetic fixing unit hasa large fixing strength to the connecting iron strips, the fixing operation and the fixing removal operation of the connecting iron strips are convenient and quick, and the heat dissipation speed ofthe needle felt is fast, and finally the PTFE fiber filtration dust removal ability is improved.

The invention discloses chenille composite yarn capable of generating static electricity and achieving efficient air filtration. The chenille composite yarn comprises ultrafine fiber chenille single yarn I and ultrafine fiber chenille single yarn II; camlet I of the ultrafine fiber chenille single yarn I and camlet II of the ultrafine fiber chenille single yarn II are two different fiber materials with quite different dielectric constants. Compared with the prior art, the chenille composite yarn has the advantages that the prepared chenille composite yarn capable of generating static electricity and achieving efficient air filtration is suitable for removing fine particles, and when the chenille composite yarn is adopted for electrostatic dust removal, the advantages of safety, reliability, good maintainability, low operating cost and the like are achieved; the chenille composite yarn has strong electrostatic filtration, adsorption and dust removal abilities, is soft in handfeel and has high dust collection performance and an extremely powerful cleaning function; the production method can adapt to knitting and weaving processing, and knitted or woven fabrics have good air filtration and dust removal performance, so that the life demands of people are enriched.

The invention relates to a soot compression device having a soot waste heat utilization function for an electric dust removal tool. The soot compression device comprises an air inlet pipe and a connection pipe. The left side of the air inlet pipe is provided with a grounding wire. The lower end of the air inlet pipe is provided with a connection plate. A bottom valve is inlaid in the lower end ofthe connection plate. The middle of the upper end of the bottom valve is connected to a connection rod. The upper end of the connection rod is provided with a brush ring. The lower end of the right side of the air inlet pipe is fixedly provided with a filter pipe. Through the brush ring, the connection rod is fixed above the bottom valve and the outer side of the connection rod contacts with the inner wall of the air inlet pipe. When the bottom valve is dismounted, the brush ring is driven to slide from the upper end to the lower end in the air inlet pipe and the brush ring and the inner wallof the air inlet pipe generate friction so that the dust on the inner wall of the air inlet pipe can be removed through the brush ring, dust flowing influence caused by excessive impurities inside theair inlet pipe is prevented and the interior of the air inlet pipe can be cleaned regularly.

The invention belongs to the technical field of dust removal equipment, and particularly relates to a plasma flue gas desulfurization, denitrification and dust removal integrated device, which comprises a box body, an air inlet is formed in one side of the box body, an exhaust port is formed in the other side of the box body, and a dust removal unit, a plasma oxidation unit and a desulfurization unit are sequentially arranged in the box body from the air inlet to the exhaust port; the dust removal unit comprises a first rotating shaft and a filter cylinder, the filter cylinder is in a rigid hollow cylinder shape, and the filter cylinder is rotationally connected with the box body through the first rotating shaft; the end, extending out of the box, of the first rotating shaft is driven by a motor, flexible annular filter cloth is arranged in the filter cylinder, a flexible magnetic strip is arranged on the periphery of the filter cloth, and the filter cloth is attached to the inner periphery of the filter cylinder; a flexible falling curtain is fixedly connected in the box body at the top of the filter cylinder through a bracket; the falling curtain is attached to the periphery of the filter cylinder; according to the invention, the flexible filter cloth can be quickly disassembled to replace new filter cloth, so that the cleaning efficiency of the filter cylinder is improved, and the filtering and dust removing effects of flue gas are further improved.

The invention relates to a flue gas dedusting technology, in particular to a flue gas ultra-clean treatment system. The flue gas ultra-clean treatment system comprises a bag type dust collector, an agglomerating agent solution source and an atomizing and sprinkling device, wherein the bag type dust collector is provided with an inlet flue; the atomizing and sprinkling device is mounted in the inlet flue; the atomizing and sprinkling device is in communication with the agglomerating agent solution source through a conveying pipe; and a conveying device is arranged on the conveying pipe. The system has the advantages of being simple and reasonable in structural design, significantly improving the dust removal efficiency and effect, improving the flue gas emission index, and reducing the usecost.

The invention relates to the technical field of dust removers, and discloses a segmented discharge type flow-equalizing bag-type dust remover, an ash material box is connected to the lower part of a dust removal box, an air inlet pipe opening is connected to the middle position of one side of the ash material box, and a segmented dust removal assembly is arranged on the inner side of the dust removal box; and a vibration driving assembly is arranged on the inner side of the dust removal box and right opposite to the lower part of a partition plate frame in the segmented dust removal assembly. A traditional single cloth bag filtering mode is replaced, through double combination of a primary-efficiency filtering cloth bag and a high-efficiency filtering cloth bag in the segmented dust removal assembly, double-filtering dust removal performance is achieved, and in the use process of the cloth bag dust remover, through elastic supporting of a vibration mechanism in the segmented dust removal assembly and up-down pushing of the vibration driving assembly, the dust removal efficiency is improved, and the dust removal efficiency is improved. According to the dust remover, dust adhered to a cloth bag in the dust remover can be shaken off in a mechanical vibration mode, a traditional high-pressure gas injection mode is replaced, and the dust adhered to the cloth bag can be shaken off in an integrated and all-directional vibration mode.

The invention discloses pulse filter bag type explosion-proof dust removing equipment which comprises an air inlet, an air outlet, an explosion-proof valve, a pressure sensor, a pressure pump, a controller, an electromagnetic pulse valve, a venturi tube, filter dust bags and a dust remover body, wherein the pressure pump is arranged on the dust remover body; the multiple filter dust bags are arranged in parallel on the dust remover body; the venturi tube is arranged between the pressure pump and the filter dust bags; the electromagnetic pulse valve is arranged on the venturi tube; the air inlet and the air outlet are arranged on the dust remover body; the explosion-proof valve is arranged on the dust remover body; the pressure sensor is arranged on the dust remover body; and the controlleris arranged on the dust remover body and is in signal connection with the pressure sensor, the electromagnetic pulse valve and the explosion-proof valve. According to the pulse filter bag type explosion-proof dust removing equipment disclosed by the invention, the pressure value in the dust remover body can be monitored in real time by an intelligent device so as to conveniently dynamically regulate the pressure input, and the explosion-proof performance of the equipment is stable and controllable by virtue of a two-stage explosion-proof device.

The invention discloses pressure loss-free filter cloth for a dust collector. The filter cloth comprises first filter cloth, first mounting rings, second filter cloth and second mounting rings, wherein the inner side of the first filter cloth is an interior trim surface; a reinforcing net is arranged on the outer side of the interior trim surface; a first dust removal net is arranged on the outer side of the reinforcing net; reinforcing ribs are uniformly arranged inside the first dust removal net; a surface layer is arranged on the outer side of the first dust removal net; the first mounting rings are arranged at two ends of the first filter cloth; four groups of mounting solenoids are arranged on the inner sides of the first mounting rings; mounting bolts are mounted on all the mounting solenoids. By the adoption of a design of two layers of filter cloth, the first filter cloth is mounted on the inner sides of the first mounting rings; furthermore, the second mounting rings are mounted through the mounting solenoids and the mounting bolts, and the second filter cloth is mounted through the second mounting rings; under the cooperation action of the first filter cloth and the second filter cloth, the filter cloth disclosed by the invention is better in filtering and dust removal effect.

An electric fresh air mask with a dust removal filter material convenient to replace comprises a mask front piece made of the dust removal filter material, wherein a supporting piece made of engineering plastic is arranged behind the mask front piece, a plurality of air holes are formed in the surface of the supporting piece, a rear piece made of the engineering plastic is arranged behind the supporting piece, and a groove concaved backwards is formed in the middle of the rear piece. A fan is fixed in the groove in the middle of the rear piece, an exhaust hole is formed in the side wall of thetop or the bottom of the groove, the left end of the rear piece and the right end of a left elastic insertion sheet are connected into a whole, the left elastic insertion sheet is inserted between aleft cloth pressing strip and the mask front piece from an left insertion opening, and the right end of the rear piece and the left end of a right elastic insertion sheet are connected into a whole. The right elastic inserting sheet is inserted between a right cloth pressing strip and the mask front piece from a right inserting opening. The electric fresh air mask with the dust removal filter material convenient to replace is good in dust removal effect, high in efficiency and capable of enabling a person wearing the mask to breathe smoothly without feeling suffocated; and the sanitation of the mask can be ensured by replacing the dust removal filter material, and the use cost is reduced.

The invention relates to a health mask with a Chinese herbal medicine filter cartridge. The health mask with the Chinese herbal medicine filter cartridge comprises a mask body. A ventilation hole is formed in the front end of the mask body. A first one-way ventilation valve is arranged at an outlet of the outer portion of the ventilation hole. A partition plate is arranged in the mask body to divide the mask body into a gas supply chamber and a filter chamber. A ventilation pipe is arranged on the partition plate. A second one-way ventilation valve and a third one-way ventilation valve are separately arranged at the upper and lower ends of the ventilation pipe. The Chinese herbal medicine filter cartridge is directly arranged under the ventilation pipe, and air-permeable film sheets are arranged at the upper and lower ends of the Chinese herbal medicine filter cartridge. According to the health mask with the Chinese herbal medicine filter cartridge, the structure is reasonable, the sealing is tight, the filtering and dust removal effect are good, the air filtering purity is high, the respiratory disease can be effectively treated, smoothness of breathing is ensured, the technical problems that an existing common mask is not tight in sealing, poor in the dust filtering effect, mall in the dust load, can not be used normally in the workplace with high dust concentration and can not treat respiratory disease are solved, and compared with the prior art, the health mask with the Chinese herbal medicine filter cartridge has a good market prospect and development space.

The invention belongs to the field of household electrical appliances, and in particular relates to an ultra-clean high-efficiency vacuum cleaner, which includes a casing, and a fan is arranged inside the casing, and the air inlet of the fan is connected to a suction pipe at the front end of the casing. The inner side wall of the tube is sealed and rotated with a rotating plate, and a semicircular air hole is arranged in the rotating plate, and a conical rotor is fixedly connected to the side wall of the rotating plate, and the side wall of the conical rotating head There are a plurality of air passages arranged in the circumferential direction. The inner side wall of the suction pipe is fixedly connected with a flexible plate, and the flexible plate is connected to the rotating plate in a sealed and rotating manner. On the side wall of the air inlet end of the suction pipe Two pipe bodies are fixedly connected, and one end of the pipe bodies is opened. The invention can efficiently and thoroughly remove the stubborn dirt with strong adhesion and the dust hidden in the fiber fabric, has a good dust removal effect, and can effectively absorb the dust through the filter plate to prevent the dust from affecting the normal operation of the fan Normal work is affected.

The invention provides an efficient filtering and deashing device with an inner-cone double-layer filter cartridge, which comprises an outer filter cartridge (1), an inner-cone filter cartridge (2), a double-slit blowing pipe (3), a mounting cover (4), a sealing cover (5) and an oblate sphere (6), the mounting cover (4) is mounted at the top of the outer filter cartridge (1), the sealing cover (5) is mounted at the bottoms of the outer filter cartridge (1) and the inner-cone filter cartridge (2), the oblate sphere (6) is mounted at the top of the inner-cone filter cartridge (2), and the double-slit blowing pipe (3) is connected with the oblate sphere (6). The double-slit blowing pipe (3) is vertically mounted at the upper part of the oblate sphere (6); the filtering surfaces of the outer filtering cylinder (1) and the inner conical filtering cylinder (2) are of a wrinkle structure with triangular wrinkles (7) and short flat wrinkles (8) at intervals; and an air flow connecting pipe (10) and a flow guide connecting pipe (11) of the double-slit blowing pipe (3) are connected with a high-pressure air flow pipe (9) and respectively lead to a lower blowing pipe cover (12) and a blowing pipe body (13). The device has the advantages of large filtering area, large pulse gas flow, high ash removal efficiency and the like.

The invention provides a wide-purpose quick-loading dust filter bag, which includes a dust filter bag body, a positioning mechanism, a connecting ring, a first clamping piece and a second clamping piece. There is a connection ring, and a positioning mechanism is provided between the dust filter bag body and the connection ring. The top of the connection ring is symmetrically provided with a first clamping piece and a second clamping piece near the edge. A placement groove is opened inside the ring, and a buffer spring is arranged in the placement groove. The advantage of the present invention is that a positioning mechanism is provided between the dust removal filter bag body and the connecting ring, through which the positioning mechanism can limit the position between the dust removal filter bag body and the connecting ring on the one hand, and on the other hand, can limit the position of the dust removal filter bag body and the connecting ring. The shape of the filter bag body is restricted to avoid the entanglement of the dust filter bag body during use, so that the dust removal effect of the dust filter bag body is better.

The invention belongs to the technical field of needled felts, and particularly relates to a high-performance PTFE (polytetrafluoroethylene) coated needled felt and a preparation method thereof. Jacks, a socket heat conduction post, a fixed heat conduction plate, a sleeving heat conduction plate, a magnetic unit and a projecting post unit are arranged among a PTFE net base layer, a heat insulationcotton layer and a PTFE coated layer, so that the PTFE coated needled felt is effectively used. The needled felt has the advantages that a five-layer structure is high in stability, a sleeving heat conduction plate fixing structure is reasonable and effective, high in fixing strength and good in heat dissipation effect, the needled felt is good in overall use effect, and the filtering dust removal capacity of the PTFE coated needled felt is finally improved.

The invention belongs to the field of flue gas dust removal, and particularly relates to a flue gas ultra-clean treatment system based on particle chemical agglomeration and bag-type dust removal. Theflue gas ultra-clean treatment system based on particle chemical agglomeration and bag-type dust removal comprises agglomeration liquid blending and generating equipment, a bag-type dust remover andan atomization spraying device; the liquid outlet of the agglomeration liquid blending and generating device is communicated with the atomization spraying device through a conveying pipe, and a firstpower conveying device is arranged on the conveying pipe; the atomization spraying device is arranged in an inlet duct of the bag-type dust remover and is used for spraying the agglomeration liquid into the flue gas flowing through the inlet duct so that fine particles in the flue gas are chemically agglomerated into large particles. The flue gas ultra-clean treatment system has the advantages ofreasonable design, ingenious combination of chemical agglomeration and bag-type dust removal, integration of agglomeration liquid preparation and dust removal, convenient operation and use of the whole equipment, small space and low cost, thereby achieving the super purification treatment of the smoke dust.

The invention discloses a dust removing device with a function of manually shaking off dust for environmental protection. The dust removing device comprises a base, a shell, a bottom plate, a motor and a cylinder, wherein a plurality of air outlets are formed in the side wall of the bottom part of an inner cylinder; a plurality of stirring blades are uniformly distributed on the inner wall of theinner cylinder, and a shell is fixed on a supporting plate and is arranged outside the inner cylinder in a sleeving manner; a fixed stand column extends into the bottom part of the inner cylinder, anda plurality of air jet holes are formed in the side wall of the fixed stand column; a filter screen having a cylindrical structure is fixedly arranged at the lower part of a filter screen fixing plate, and a plurality of fixed rings surrounding the side wall of the filter screen are fixed on the outer side of the filter screen; and a collecting groove which is sunk downward is formed in the uppersurface of the bottom plate under the inner wall of the filter screen. According to the dust removing device, the inner cylinder is driven to rotate by the motor, and the fixed stand column is drivento move left and right by the cylinder, so that air in the inner cylinder can be distributed uniformly, and the dust-removing acting range can be improved; and the filter screen is shaken by manual operation, dust on the filter screen is shaken off and falls into the collecting groove in the bottom part, and meshes of the filter screen can be prevented from being blocked.

The invention discloses a particle bed dust collector, which comprises an outer casing and at least one layer of particle bed filters vertically arranged inside the outer casing, the upper part of the outer casing is provided with a dust-containing gas inlet, and the lower part of the outer casing is A dust discharge port is provided, and each layer of granular bed filter includes at least one filter unit, each filter unit has a dust-containing gas vent and a clean gas vent, and the characteristic is that a dust pre-separation chamber is also provided inside the outer shell, and the dust pre-separation chamber is The separation chamber is connected to the dust-containing gas inlet and the dust discharge outlet. The dust pre-separation chamber is equipped with an inertial separation deflector. The dust-containing gas entering the dust pre-separation chamber is pre-separated by the inertial separation deflector and then enters through the dust-containing gas vent. In the filter unit; the advantage is that most of the dust larger than 10 microns is pre-separated under the action of the inertial separation deflector, which greatly reduces the filtration burden of the filter unit, so it can be used for dust removal and filtration of dusty gas with a large dust concentration. Dust removal effect is good.

The invention relates to a double-air-duct cloth bag-type dust remover. A middle bypass air duct is arranged between an air inlet duct and an air outlet duct of the dust remover through an inclined plate, is positioned in the dust remover and penetrates through the dust remover, so that the arrangement mode that an existing bypass air duct surrounds the outer side of equipment is replaced, the size of the whole machine is reduced, the occupied space of the equipment is reduced, materials and labor are saved, and the cost is high; a cloth bag is arranged on the outer side of a cloth bag supportin a sleeving mode. During dust removal, the bracket can support the cloth bag; the poor dust removal effect caused by cloth bag deformation is avoided; a dust removing mechanism is arranged at the upper end of a cloth bag assembly, an air tank of the dust removing mechanism provides high-pressure air for a blowing pipe, the interior of the cloth bag can be blown at any time, dust covering and adhering to the surface of the cloth bag is blown away, the filtering and dust removing effect of the cloth bag is improved, and the dust removing mode is high in automation degree and efficiency.

The invention relates to the technical field of filter cloth, in particular to a composite filter cloth. The composite filter cloth is formed by weaving of a plurality of warps and wefts, the warps are made from glass fibers, polypropylene filament yarns or basalt fibers, and the wefts are made from polypropylene split films. One or two side surfaces of the filter cloth are provided with filter films which are polyvinyl fluoride films, and the filter cloth and the filter films form an integral structure through adhesion or hot-pressing combination. The composite filter cloth has advantages that by arrangement of the filter films, small-particle-size dust adsorption and filtration performances of the filter cloth can be further improved; by combination of the filter cloth and the filter films to form the composite filter cloth, strength of traditional filter cloth and filter films is improved while dust particles in diameter smaller than 2mm can be filtered out, and accordingly long-term application in industrial dedusting equipment can be realized, long service life, great filtering and dedusting effects, less proneness to blockage of filter bags and applicability to various industrial dedusting devices are realized, and high-emission-requirement environmental protection standards can be met.