64results about How to "Implement multi-level filtering" patented technology

The invention discloses a screening device for rice processing, which relates to the field of rice processing equipment, including a casing, a feed port, a screen, a vibrating motor, a screen support, a hopper and a rice bucket. The feed port is taken from the machine On the top of the casing, the screen is inclined and one end is fixed on one of the side walls of the casing, the other end of the screen is connected to the screen bracket through a spring, and the screen bracket is fixed on the other side of the casing, so The vibrating motor is installed at the bottom of the screen, the hopper is installed directly below the screen, the bottom of the hopper is provided with a bar-shaped discharge port, and the inner wall of the casing is also provided with a blower, and the blower is located below the hopper , the rice bucket is arranged under the hopper, and the present invention can carry out multi-stage screening for rice by setting screens, hoppers and air blowers, the overall structure is compact, the operation is convenient, and the screening efficiency is high.

The invention relates to a combined type helium gas filtering sampling device for a gas cooled reactor and an installation method of the device. The combined type helium gas filtering sampling device is characterized by comprising a sleeve, at least two filter assemblies which are spaced along the axial direction and are fixed on the inner wall of the sleeve, and at least one molecular sieve assembly fixed between the two adjacent filter assemblies. The filtering sampling device provided by the invention adopts a sandwich combined type structure with the filter assemblies-the molecular sieve-the filter assembly, can fully filter fission product particles and graphite dust with different types and sizes carried by helium from a vapor generator, and can fulfill the purposes of multistage filtering, full deposition and adsorption of the fission product particles and graphite dust.

The invention provides smoke dust removal equipment for waste incineration. The smoke dust removal equipment comprises a dust collecting box, a dust suction fan is arranged in front of the dust collection box, a first filter screen, a second filter screen and a third filter screen are arranged on the inner side of the dust collecting box, a protective cover is arranged on one side of the dust collecting box, an anti-blocking assembly is arranged on the inner side of the protective cover, the anti-blocking assembly comprises a driving motor, a straight gear is arranged on an output shaft of thedriving motor, one side of the straight gear is engaged with a sector gear, one side of the sector gear is provided with a first rotating shaft and two second rotating shafts, one end of the first rotating shaft and one ends of the second rotating shafts are each provided with a connecting block, one side of each connecting block is provided with a connecting rod, and one end of each connecting rod is provided with a beating ball. Through the dust suction fan, the first filter screen, the second filter screen and the third filter screen, multi-stage filtration of dusty air is achieved, vibration of the filter screens is achieved through the anti-blocking assembly, the filter screens can be effectively prevented from being blocked, and the dust removal effect is improved.

The invention discloses a grading treatment circulating system for producing ground calcium carbonate. A raw material tank, a burdening tank, a wet mill, a cyclone, a finished pulp tank, a centrifugalmachine, a drying machine and a finished product tank are sequentially arranged in the raw material direction. The cyclone is a hydrocyclone. The hydrocyclone further comprises an overflow opening and an underflow opening. The underflow opening communicates with a recovery barrel. The recovery barrel is of a cylinder structure and is provided with a coarse material outlet. The overflow opening communicates with a division barrel. The division barrel is of a cylinder structure and is provided with a pulp outlet. The pulp outlet communicates with the finished pulp tank through a pipeline. The coarse material outlet communicates with a feeding opening of the wet mill through a pipeline. According to the circulating system, the pulp grading process is achieved, the problem that wet-milling pulp cannot be graded in domestic is remedied, the product particle size distribution is quite narrow, and the product fineness is more uniform.

The invention relates to a dust collection device for highway construction. According to the technical scheme, the device comprises a casing provided with a horizontal channel, wherein a filter cartridge, a semi-ring filtering net and rotary scraper plates are arranged in the channel, axes of the filter cartridge, the semi-ring filtering net and the rotary scraper plates are vertical and coaxiallyarranged, the semi-ring filtering net is arranged on the inner side of the filter cartridge, the rotary scraper plates are arranged on the inner side of the semi-ring filtering net and make contact with the inner side surface of the semi-ring filtering net; a planetary gear mechanism coaxial with the filter cartridge is arranged on the casing, a sun gear of the planetary gear mechanism is coaxially connected with the rotary scraper plates, a planet carrier of the planetary gear mechanism is fixed on the casing and coaxially connected with the semi-ring filtering net, a gear ring of the planetary gear mechanism is coaxially connected with the filter cartridge, and the planetary gear mechanism is driven by a driving device; an ash collecting hopper below the casing is arranged on the casing, a partition board is arranged on the inner side of the ash collecting hopper and divides the ash collecting hopper into a left chamber and a right chamber, and the left chamber and the right chamberare communicated with the channel on the left side of the filter cartridge and the inner side of the semi-ring filter net respectively. The device also comprises a water spray purification system.

The invention relates to a rapid identification method for unloading and soil piling of vehicles in a protection area. The method mainly solves the technical problems that vehicle unloading and soil piling in ground protection areas of existing tunnels, foundation pits and other underground engineering are not supervised in time and intelligent and the like. According to the technical scheme of the invention, the method comprises a video image and ultrasonic data collection system in a protection area monitoring area, and also comprises the steps: S1, protection area boundary image demarcation, image pixel resolution calibration and basic terrain elevation data scanning; s2, based on the video image, dynamically monitoring a moving object in the area through an image edge detection algorithm, and carrying out primary judgment on the large vehicle; s3, residence time of the large vehicle in the protection area is calculated, and the vehicle type is recognized; s4, vehicle unloading soilpiling three-dimensional reconstruction and volume remote non-contact measurement are carried out; s5, vehicle unloading and soil piling warning information is sent; and S6, repeating the step S1, the step S3, the step S2, the step S3, the step S4 and the step S5 to realize continuous monitoring of unloading and soil piling of the vehicles in the protection area.

The invention discloses a condensation-type defogging device, which comprises a defogging machine, a condensation recycle tank and a cooling water circulation system, wherein the cooling water circulation system is a water circulation self-closing system consisting of a cold cutting water tank, a self-suction pump and a heat exchange spiral pipe; the cold cutting water tank, the self-suction pump and the heat exchange spiral pipe are successively connected end to end by pipelines and valves; the condensation recycle tank is a sealed tank body; the bottom of the condensation recycle tank is provided with an exhaust inlet; the middle lower part of the condensation recycle tank is transversely provided with a heat exchange spiral pipe; the middle upper part of the condensation recycle tank is provided with a condensation plate; the upper side of the condensation plate is provided with an air equalization plate; the upper side of the air equalization plate is provided with a filter layer; and the top of the condensation recycle tank is provided with an opening and is provided with the defogging machine. The equipment is used for effectively removing fog generated in the industrial spraying and cleaning process so as to achieve purposes of effective removal, no residues and no pollution, a more reliable efficiency guarantee is provided for the equipment and a product, the automation degree of the equipment is further improved, and the environment is prevented from being polluted.

The invention discloses an electrostatic dust collection module and an air conditioning device. The electrostatic dust collection module comprises a support, a negative-ion generator and a conductivefilter net, wherein the two opposite sides of the support are provided with an air inlet and an air outlet correspondingly, the support is internally provided with an air flow channel which communicates with the air inlet and the air outlet, and the air flow channel is internally provided with an electrostatic dust collection element; the negative-ion generator is arranged on the support and closeto the air outlet; and the conductive filter net is arranged on the support, covers the air inlet and is connected with positive voltage with a preset voltage value. By means of the electrostatic dust collection module and the air conditioning device, multi-stage filtering of air is achieved, and the air purifying efficiency is improved.

The invention relates to a filter device, in particular to a rainwater filtering, purifying and utilizing device. The device comprises a rainwater collecting hopper, an n-shaped fixing frame, a rainwater preliminary filtering cylinder, a conveying impurity removal assembly, a wind power driving device, a one-way linkage assembly, a rotating turbulent flow assembly, a mounting rack plate, an impurity removal filter box, a water conveying pipe, a filtering water storage box, a rotating flow filter assembly and a supporting base. The rainwater collecting hopper is fixedly connected to one end ofthe impurity removal filter box through the n-shaped fixing frame; the rainwater preliminary filtering cylinder is in rotating-fit connection with the interior of the rainwater collecting hopper, thelower end of the rainwater preliminary filtering cylinder is fixedly connected with the conveying impurity removal assembly, and the upper end of the conveying impurity removal assembly is in sealingrotating connection with the center of the bottom end of the rainwater collecting hopper; multi-stage filtering of rainwater can be achieved, impurities generated when rainwater is filtered can be automatically discharged, and the rotating turbulent flow assembly and the rotating flow filter assembly containing activated carbon adsorption particles are arranged inside, so that rainwater can be subjected to adsorption and impurity removal under the effect of rainwater rotating flow.

The invention discloses a precise liquid filtering apparatus. The apparatus comprises a rotatable filter cylinder device, the rotatable filter cylinder device is provided with an ultrasonic wave or air explosion cleaning device, the filter cylinder device is connected with a liquid inlet tube, a liquid outlet tube and a waste discharging tube, the filter cylinder device communicates with a filter stock solution through the liquid inlet tube, the liquid inlet tube is provided with a circulating pump, the water outlet tube is provided with a vacuum pump, a filtered filtrate is pumped out by the vacuum pump, and the waste discharge tube communicates with the filter stock solution. The apparatus adopts a nuclear porous membrane or an effective compound of the nuclear porous membrane and other filter materials as a filter material reserves the filtration characteristics of a traditional filter material and the fine filtration effect of the nuclear porous membrane, and the apparatus adopting a cross flow filtration manner keeps pollutants on the surface of the filter membrane at a small level, alleviates the obstruction of filter pores, improves the filtering efficiency and prolongs the service life of the filter membrane.

The invention relates to the technical field of agricultural fertilizers, in particular to an organic fertilizer particle molding device. The organic fertilizer particle molding device comprises a crushing mechanism, a smashing mechanism, a pelletizing mechanism and a screening mechanism, the pelletizing mechanism is horizontally arranged, the smashing mechanism is mounted above one end of the pelletizing mechanism, the crushing mechanism is mounted above the smashing mechanism, the screening mechanism and the pelletizing mechanism are arranged alternately, the two ends of the screening mechanism and the pelletizing mechanism are provided with a first conveyor belt and a second conveyor belt respectively, the pelletizing mechanism comprises an extrusion assembly and a cutting assembly, thecutting assembly is mounted at the front end of the extrusion assembly, the screening mechanism comprises a driving assembly and a screening assembly, the screening assembly is horizontally arranged,the driving assembly is located at one end of the screening assembly, and the driving assembly is connected with the screening assembly. The organic fertilizer particle molding device has the beneficial effects that multi-level separation of semi-finished particles can be achieved, unqualified products can be automatically transported back to a processing device and re-processed, the structure issimple, and the production speed can be improved.

The invention relates to a device for boiling traditional Chinese medicine liquid. The device comprises a kettle body and a kettle cover, a rotating shaft vertically penetrating through the kettle cover is installed on the kettle cover, a spiral groove is formed on the outer edge face of the rotating shaft, and a pushing rod matched with the spiral groove is arranged on the kettle cover, and is arranged in the spiral groove; a filtering net ring with the closed bottom is arranged on the inner side of the kettle body, a plurality of positioning columns protruding downwards are arranged at the bottom of the filtering net ring, a plurality of positioning holes are formed in the kettle body, and the positioning columns are inserted into the positioning holes; a pressing disc and a bottom discwhich are coaxial with the rotating shaft are arranged on the inner side of the filtering net ring, the lower end of the rotating shaft is in threaded connection with the pressing disc, the bottom disc is rotationally connected with the filtering net ring, a plurality of vertical shafts arranged at the upper portion of the bottom disc are installed on the bottom disc, the upper ends of the vertical shafts slidingly penetrate through the pressing disc, a plurality of straight rods arranged at the lower portion of the pressing disc are arranged on the pressing disc, the middles of the straight rods are hinged to the pressing disc, limiting sliding grooves are formed in the vertical shafts, one ends of the straight rods are arranged in the limiting sliding grooves, the other ends of the straight rods are in contact with the lower end face of the rotating shaft, an annular filtering net is arranged on the outer side of the filtering net ring, and a stopping ring is arranged on the outer side of the annular filtering net.

The invention discloses a screen drum type sand screening device for a building. The screen drum type sand screening device comprises a bottom plate; a screen drum is arranged between two supporting plates; a mounting shaft is fixed on the two sides of the screen drum separately; the drum wall of the screen drum is formed by two semicircular screens in an encircling mode; a material box is arranged at the top of the screen drum; the bottom of the material box is open and is in contact with the upper surface of the screen drum; the material box is connected with the top of the supporting platesthrough L-shaped rods; a first discharge port is formed in the top in one side, far away from a feed hopper, of the screen drum; a second discharge port is formed in one side, close to the feed hopper, of the material box; valves are mounted on the first discharge port and the second discharge port respectively; the end of the mounting shaft at one side of the screen drum is fixedly connected with the output shaft of the motor through a coupler; and the motor is installed on the supporting plates through bolts. The screen drum type sand screening device is novel in practical structure and simple in operation; by setting the screen drum, multistage screening can be realized, the production cost is low, and the occupied area is small; and meanwhile, a brush strip is arranged, so that the screen drum can be brushed, blockage of the sieve holes is avoided, and the screening efficiency is improved.

The invention discloses a classificator for dried fruits. The classificator for the dried fruits comprises a stand. The stand is provided with a screen sorting mechanism mutually connected with a power drive mechanism; the screen sorting mechanism is a long tube-shaped screen which is arranged along the length direction of the stand and can rotate around the axis of the long tube-shaped screen; the inner wall of the long tube-shaped screen is provided with a plurality of material pushing ribs arranged in a thread form from the inlet direction to the outlet direction of the screen sorting mechanism; and a plurality of sorted receiving hoppers are paved at the bottom part of the long tube-shaped screen in sequence along the axis direction of the long tube-shaped screen. Through the spiral material pushing ribs arranged on the inner wall of the long tube-shaped screen and rotary screening and sorting, materials can move in time during a screening and sorting process, and therefore, the production efficiency of the screening and sorting is improved, the materials in the long tube-shaped screen can be completely sorted to the greatest extent, and the sorting quality is improved.

The invention relates to an automobile air conditioner ventilation device which comprises a ventilation pipe which comprises a vertical pipe and a horizontal pipe, wherein an inlet is formed in the horizontal pipe, and a net plate is arranged at the inlet; an electrostatic dust collection mechanism which comprises an electrode plate; a dust removal box; a first rotating motor; a supporting column, wherein rotating block is rotationally arranged at the upper end of the supporting column; a first telescopic cylinder; a brush; compared with the prior art, the dust removal effect of the electrode plate is guaranteed, and the electrostatic dust removal effect is improved.

The invention discloses a rotatably-collided traditional Chinese medicinal material drying device which comprises a base, a sealing box, a drying cylinder, an air heater and an air inlet chamber. Theair heater is mounted at the top of the base and positioned on the right side of the sealing box, the sealing box is fixed on the left side of the top of the base, and the drying cylinder is arrangedin the sealing box. When the drying device works, continual positive and negative rotation of the drying cylinder is achieved, so that medicinal materials in the drying cylinder are turned over and uniformly heated, drying efficiency is improved, drying effect is ensured, the drying cylinder can intermittently and suddenly stop in the rotating process, so that medicinal materials attached on an inner cavity wall of the drying cylinder are shook off, wall hanging conditions are prevented, discharging is conveniently performed, the device is provided with the air inlet chamber with filtering plates, air can be filtered, purity degree of heat air flow is ensured, the medicinal materials cannot be polluted, a plurality of filtering plates are arranged in the air inlet chamber, multistage filtering can be achieved, and filtering effects are improved.

The invention discloses a screening device with a dust removal function for rice production, and relates to the technical field of rice screening. In order to solve the multi-stage screening problem, the device specifically comprises a base, a throwing type conveying mechanism, an impurity removing mechanism and a screening mechanism are sequentially arranged on the outer wall of the top of the base according to the rice path, the screening mechanism comprises a screening shell and screen plate assemblies which are oppositely arranged in the screening shell in a staggered manner, and each screen plate assembly comprises a screen mesh and a screen mesh; and the screen meshes are rotationally connected with the outer walls of the opposite sides of an impurity guide plate, and the outer wall of the other side of the impurity guide plate is fixedly connected with the inner wall of the screening shell. On one hand, the device can replace a filter screen, is simple in structure and reduces the cost, on the other hand, when rice subjected to wind power transversely moves, the rice can collide with an inclined baffle, the collided rice can continuously collide with other rice grains, the confusion degree of falling of the whole rice is increased, therefore, gaps between the rice are increased, and the dust removal effect is better.

The invention relates to a filtering device, in particular to a rainwater filtering purifying and using device. The rainwater filtering purifying and using device comprises a rainwater collecting hopper, a door-shaped fixing frame, a rainwater primary filtering cylinder, a delivery and impurity discharging assembly, a wind power driving device, a one-way linkage assembly, a rotating turbulent flowassembly, an installation rack board, an impurity discharging and filtering box, a water delivery pipe, a filtering and water storing box, a rotational flow filtering assembly and a supporting base,wherein the rainwater collecting hopper is fixedly connected with one end of the impurity discharging and filtering box through the door-shaped fixing frame; the rainwater primary filtering cylinder is connected with the interior of the rainwater collecting hopper in a rotating and matched mode, the lower end of the rainwater primary filtering cylinder is fixedly connected with the delivery and impurity discharging assembly, and the upper end of the delivery and impurity discharging assembly is connected with the center of the bottom end of the rainwater collecting hopper in a sealed and rotating mode. By means of the rainwater filtering purifying and using device, multi-stage filtering can be conducted on rainwater, impurities which are generated when the rainwater is filtered can be subjected to automatic discharging work, moreover, the rotating turbulent flow assembly and the rotational flow filtering assembly with internal activated carbon adsorption particles are arranged in the rainwater filtering purifying and using device so that adsorption and purification work can be conducted on the rainwater under action of rotational flows of the rainwater.

The invention discloses an automatic protection type sandstone sorting and collecting integration device for mechanical engineering. The automatic protection type sandstone sorting and collecting integration device for mechanical engineering comprises a support plate, wherein a soundproof box is welded to the middle of the top end of the support plate; a grading and screening mechanism is arrangedin the soundproof box; first muffling plates are adhered to the top end and two side surfaces of the soundproof box; stand columns are welded to the top end of the support plate in a penetrating waythrough a central symmetry manner; second muffling plates are adhered to the outer side surfaces of the two stand columns through magic tapes; and the first muffling plates and the second muffling plates have the same structures and concretely comprise foamed aluminum substrates, gas-permeable membranes, flexible support columns and side plates. The automatic protection type sandstone sorting andcollecting integration device for mechanical engineering provided by the invention is scientific and reasonable in structure, and safe and convenient to use; with the aid of the grading and screeningmechanism, multistage screening is realized, so that the outer diameter difference of sorted stones is small, and the stones with different outer diameters are fully utilized conveniently; and meanwhile, by adopting a special noise processing structure, the equipment noise is remarkably reduced.

The invention discloses an aramid fiber filter bag for dust removal and filtration of industrial waste gas. The aramid fiber filter bag comprises a filter bag mounting port, an external filter bag, a sliding fixing hoop, a screw base, a fixing screw and an absorption assembly; the filter bag mounting port internally comprises two types of embedded sleeves, and the first type of embedded sleeve is fixedly provided with a filter sieve plate through a fixing folded plate; large-particle dust in waste gas can be intercepted by the filter screen plate and is prevented from entering the external filter bag to cause damage to a filter bag shell or an assembled filter screen bag, and the circulating speed of the waste gas is limited by a filter opening in the bottom of the embedded sleeve, so that the waste gas can smoothly enter the external filter bag to complete the filtering the dust in the waste gas. Meanwhile, the external filter bag is assembled through a bolt assembly and is convenient to disassemble, clean and install, multi-stage filtration of the filter bag on the waste gas is effectively achieved, the filter bag is rapid and convenient to assemble and disassemble, internal cleaning is convenient, and therefore blockage is avoided.

The invention relates to the technical field of flour raw material screening, and discloses a raw material graded screening device used for flour processing. A first screen is connected above a secondscreen in a clamping manner. A third screen is connected below the second screen in a clamping manner. First clamping pins are installed on the lower surface of the first screen, and first clamping pins are installed on the lower surface of the second screen. A recycling assembly is arranged below the third screen. A vibration motor is installed on one side of the second screen. A screening assembly is fixedly installed on the front surface of the first screen. A sundry removal assembly is connected to the upper surface of the first screen in a clamping manner. By arranging the screening assembly, screening cleaning can be effectively conducted on wheat, and multi-stage screening of the wheat is achieved; by arranging the sundry removal assembly, dust in the wheat on the first screen andthe hollow wheat which is screened out can be sucked away, and it is avoided that the screening work of the wheat is influenced; and by arranging the recycling assembly, the situation that due to thefact that the screened wheat is scattered, loss is likely to be caused can be effectively prevented.

A disclosed novel steam-water separation device comprises a water storage base, an air outlet pipe communicates with the middle of the outer wall of the right side of the water storage base, a drainage cylinder communicates with the left side of the top of the water storage base, an air inlet pipe communicates with the middle of the outer wall of the left side of the drainage cylinder, a fastening plate is fixedly connected to the middle of the right side of the top of the water storage base, and the top of the fastening plate is provided with a separation device. The invention relates to the technical field of steam power. According to the novel steam-water separation device, the situation of leakage in the water flow conveying process is avoided, internal parts are convenient to maintain after being damaged through opening and closing of the sealing top cover, in the communicating process of the middle fixing support, steam is convenient to transfer, internal parts are protected, corrosion to the parts is reduced, and the separation mechanism is connected with a flow guide mechanism, so that it is guaranteed that internal water flow can be fully collected, the interior has good sealing performance, and the situation that the interior is in a completely wet state is avoided.

The invention discloses a mechanical screening device. The mechanical screening device comprises a hemispherical seat, a balance ball is fixedly connected to the middle position of the inner surface of the hemispherical seat, a partition plate is movably connected to the position, close to the balance ball, of the inner surface of a screening barrel, a fluctuating mechanism is movably connected to the side, away from the balance ball, of the partition plate, and a spherical soft plate is movably connected to the side, away from the partition plate, of the fluctuating mechanism. An inclination angle mechanism is movably connected to the position, located on the partition plate, of the outer surface of the screening barrel, screening holes are formed in the position, located above the spherical soft plate, of the outer surface of the screening barrel, and a water injector is fixedly connected to the middle position of the top of a top cover. The invention relates to the mechanical technical field. Water flow is used for cleaning away dust on the surfaces of plastic particles, dust is prevented from influencing the weight of the particles, the particles are effectively layered through different water buoyancy degrees caused by different shapes of the particles, meanwhile, the device obliquely rotates, the particles are layered and discharged, and the particle screening quality is guaranteed.

The invention discloses a mobile household sewage treatment device which comprises a basic rectangular mobile base, wherein a long water storage tank, a differential pressure water filtering device and a removable filtering device are arranged at the upper end of the basic rectangular mobile base; the removable filtering device is composed of a primary filtering water tank, a secondary filtering water tank, a transverse rectangular hole, a primary filtering framework, a secondary filtering framework, a primary filtering screen and a secondary filtering screen; the differential pressure water filtering device is composed of a rectangular filtering tank, a longitudinal baffle base, vertical rectangular slots, a manual auxiliary water outlet device, vertical circular slots, a compression cylinder, a piston, transverse rectangular slots, filtering layers and differential pressure water retaining structures; and the manual auxiliary water outlet device is composed of a vertical fixing rack,a vertical fixing rod, a rotating disc, a fixing sliding block, an operation rod, a fixing base, a swinging rod, a long chute, a vertical guide groove, a guide rod, a telescopic airbag and a connecting rod. The mobile household sewage treatment device has the beneficial effects of being simple in structure and good in practicability.

The invention discloses a large-scale preparation and purification method for superfine silver nanowires. The large-scale preparation and purification method comprises the following steps of mixing ethylene glycol with diethylene glycol, adding polyvinylpyrrolidone, carrying out stirring for dissolving, then adding silver nitrate, carrying out stirring for dissolving the silver nitrate, then adding an ethylene glycol solution of tetrabutylammonium chloride and tetrabutylammonium bromide, carrying out stirring, adding ferric trichloride hexahydrate, after carrying out heating for reaction, carrying out natural cooling to room temperature to obtain superfine silver nanowire mother liquor; and diluting the superfine silver nanowire mother liquor, adding the diluted superfine silver nanowire mother liquor into a filtering device, and carrying out separation and purification to obtain the extremely pure superfine silver nanowires. According to the preparation method for the superfine silver nanowires, the prepared silver nanowires are narrower in diameter range and large in length-diameter ratio; and the preparation method does not need inert gases, expensive reagents and toxic reagents, and is low in preparation cost, simple to operate, suitable for industrial production, simple in post-treatment and low in treatment cost.

The invention discloses a multistage filtering device for a polymer organic solution, and belongs to the field of filtering. The device includes a base, a first-stage sealing cylinder that is arrangedon the base, the filtering motor that is arranged on the bottom side of the first-stage sealing cylinder, the second-stage sealing cylinder that is arranged in the first-stage sealing cylinder and connected with the output end of the filtering motor, the multiple sets of filtering net cylinders that are arranged in the second-stage sealing cylinder and are coaxially arranged, and the heating setthat is arranged between the first-stage sealing cylinder and the second-stage sealing cylinder. According to the invention, the multi-stage filter screen cylinder is designed in the second-stage sealing cylinder to realize one-time multi-stage filtering, the heat preservation effect is good, the temperature loss is small, and the filtering effect and the filtering efficiency of the polymer organic solvent are greatly improved.

The invention discloses a plastic modified particle vibrating separator which comprises a support and a screening box. The screening box is mounted above the support through spring supports. A vibration exciter is fixedly mounted on the bottom face of the screening box, and the screening box is vibrated through the vibration exciter. An opening is formed in the upper end of the screening box, a three-level screening mechanism is arranged in the screening box and sequentially composed of a first-level screening disc, a second-level screening disc and a third-level screening disc from top to bottom, and a sliding rail matched with the three-level screening mechanism is arranged in the screening box. The plastic modified particle vibrating separator is simple and reasonable in structure and convenient to use; multi-level screening can be overall achieved, and meanwhile subsequent replacement and maintenance are facilitated through the equipment structure; and an even distribution mechanism is overall arranged, distribution during feeding is facilitated, and manpower is saved.

The invention discloses an efficient sand and stone screening device for oil exploitation. The efficient sand and stone screening device comprises a fixing box, an oil inlet pipe, an oil outlet pipe, a screening mechanism and a stirring mechanism, the fixing box is vertically arranged, the oil inlet pipe is arranged at the top end of the fixing box, the oil inlet pipe communicates with the fixing box, the oil outlet pipe is arranged on one side of the bottom end of the fixing box, the oil outlet pipe communicates with the fixing box, the screening mechanism and the stirring mechanism are both arranged in the fixing box, the screening mechanism comprises a screening box, a supporting rod, a screening assembly and a vibration assembly, and the stirring mechanism comprises a limiting assembly and a stirring assembly. According to the efficient sand and stone screening device for oil exploitation, through the cooperation of the screening mechanism and the stirring mechanism, the multi-stage filtering of a main body is realized, the quality is improved, the filtering efficiency is improved, the filtering effect is improved, the flowability of the main body is improved, the communication of a plurality of mechanisms is realized through the same driving source, and the use practicability is improved.

The invention discloses an expandable ultra-filtration centrifugation pipe using an AAO porous membrane. The expandable ultra-filtration centrifugation pipe comprises a cover, a filtrate cylinder, a plurality of filtering layers and a bottom cylinder, wherein the cover, the filtrate cylinder, the plurality of the filtering layers and the bottom cylinder are sequentially connected, the filtering layer comprises a sealing ring, an AAO porous membrane, a support sheet and a cascade member, the sealing ring, the AAO porous membrane, the support sheet and the cascade member are sequentially and closely attached, the filtrate cylinder is closely attached to the seal ring in the filtering layer adjacent to the filtrate cylinder, the cascade member of the filtering layer is closely attached to theseal ring in the filtering layer adjacent to the cascade member, and the bottom cylinder is connected to the cascade member in the filtering layer adjacent to the bottom cylinder. According to the present invention, by utilizing the AAO porous membrane as the ultra-filtration membrane, the pore size is uniform, and the filtration effect is precise and reliable; the filtering layers can be expanded, such that the layer-to-layer separation of particles having different particle sizes can be achieved, multi-stage filtration can be simultaneously achieved, and the particles having a certain medium particle size can be precisely obtained; and the expandable ultra-filtration centrifugation pipe has advantages of simple structure and convenient installation, wherein various components are tightly connected so as to effectively prevent the filtrate leakage.