287results about "Paper material treatment" patented technology

The invention discloses a two-stage slag separator tailing diluting and re-screening device, which relates to the technical field of tailing screening, and comprises a box body, a first screening cavity, a diluting cavity and a second screening cavity, a first screening assembly and a second screening assembly are arranged on the box body; the first screening assembly comprises a first connecting seat, a first screening seat, a first synchronous belt structure and a screening mesh belt; heavy impurities in tailings are screened through the arranged diluting assembly and the arranged first screening assembly, light impurities in the tailings are screened through cooperation of a first screening base, a first synchronous belt structure, a screening net belt and a liquid guide pipe, and the impurities are collected through cooperation of a negative pressure suction nozzle, a negative pressure pipe, negative pressure equipment and a collecting tank; according to the screening device, the supporting plate, the filtering base, the filtering piece, the filtering plate, the first air guiding piece, the second air guiding piece and the driving motor are arranged, collected impurities are cleaned, the first screening assembly does not need to be stopped, the screening effect of the first screening assembly is improved, and the using effect of the screening device is improved.

The invention relates to the technical field of pulping production, in particular to a spherical digester device for pulping. Comprising a fixing frame, a spherical heat preservation shell is arranged in the fixing frame, a spherical cooking shell is concentrically fixed in the heat preservation shell, rotating shafts are fixed to the two ends of the cooking shell, the rotating shafts penetrate through the heat preservation shell and are rotationally connected with the fixing frame, and a driving unit for driving the rotating shafts to rotate is arranged on the fixing frame. The cooking shell and the heat preservation shell are driven by the motor to rotate integrally, and a multi-dimensional mixed flow field is formed under the action of centrifugal force and gravity in combination with the baffle structures uniformly distributed on the inner circumference. The wood chips and the alkali liquor are repeatedly cut and dispersed by the baffles in the rolling process, the static accumulation and layering phenomena are broken, uniform permeation of fibers and the reaction liquor is achieved, and the cooking reaction time is greatly shortened.

The invention provides nano cellulose as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) carrying out heating reaction on a mixed solution containing a biomass material and a eutectic solvent, and filtering to obtain fibers; (2) mixing the fiber with a solvent, and performing ultrasonic treatment to form the nano cellulose; wherein the eutectic solvent comprises a hydrogen bond donor and a hydrogen bond acceptor, the hydrogen bond donor is selected from 2-aldehyde acetic acid and / or chloroacetic acid, and the hydrogen bond acceptor is selected from choline chloride. The preparation method provided by the invention can effectively reduce the cost and energy consumption for synthesizing the nano cellulose.

The utility model relates to the technical field of refined cotton, in particular to a refined cotton cooking device with a tail gas absorption mechanism, which comprises a base and a cooking pot, the cooking pot is arranged at the upper end of the base, a support frame is arranged on one side of the base, an adjusting mechanism is arranged at the bottom end of the cooking pot, a movable component is arranged in the adjusting mechanism, and the tail gas absorption mechanism is arranged on the movable component. An adjusting assembly is arranged at the bottom end of the cooking pot, a fixing plate is arranged in the adjusting assembly, a servo motor is arranged on one side of the fixing plate, a threaded rod is rotationally installed at the output end of the servo motor through a coupler, a limiting sleeve is arranged on the fixing plate, a sliding sleeve is arranged on the threaded rod, a movable support is arranged on the sliding sleeve, and a movable support is arranged on the movable support. A movable support is arranged on the base, a supporting rod is arranged on the movable support, a hinge is arranged at one end of the supporting rod, a treatment mechanism is arranged on one side of the base, a treatment tank is arranged in the treatment mechanism, an air inlet is formed in one side of the treatment tank, and filter cotton is arranged in the treatment tank.

The invention provides a permanent-magnet direct-drive pressurized screen without a transmission part, and belongs to the technical field of papermaking machinery. According to the structure, a barrel is fixedly connected to the interior of a shell, a vector permanent magnet motor is fixedly connected to the interior of the barrel, a bearing is arranged in the barrel, a main shaft of the vector permanent magnet motor is connected to the bearing, a mechanical seal is arranged at the position, penetrating through the barrel, of the main shaft of the vector permanent magnet motor, and a rotor is connected to the main shaft; a screen cylinder is fixedly connected in the shell and located on the periphery of the rotor, a channel is formed in the position, located on the periphery of the main shaft and the vector permanent magnet motor, in the barrel, and a water retaining ring is arranged at the position of a lower port of the channel. The rotor of the pressure screen is directly driven in the mode that the vector-controlled permanent magnet motor stretches out of the power shaft, the disassembly, assembly and maintenance efficiency and the equipment operation safety are improved, the coaxiality of the rotor and the screen cylinder is directly guaranteed, meanwhile, certain cost is reduced, and the technical advantages are outstanding.

The invention relates to the technical field of resources and environment, in particular to a method for pretreating lignocellulose by using a rumen microorganism dry method. The method comprises the following steps: crushing lignocellulose to 1-5cm, and filling the crushed lignocellulose into a sealed space; spraying microorganisms under an anaerobic condition according to a mass ratio of rumen microorganisms to lignocellulose volatile components of (0.015-0.03): 1, and controlling the water content of the system to be 30-60%; the pretreatment temperature is regulated and controlled to be 35-42 DEG C, the pH is 6.0-7.5, the pretreatment time is 10-14 days, so that the total abundance of the functional microorganisms Pseudocidovorax, Hallella and Prevotella is greater than or equal to 55%, and the three types of microorganisms respectively form strong interaction with specific companion bacteria; when the relative crystallinity of the lignocellulose is reduced by more than 15% and the volatile component is reduced by 10%, finishing the pretreatment; and performing process regulation and control according to the crystallinity and the reducing sugar yield when the pretreatment is performed for 10 days. The dry process is adopted, the bionic principle and the solid-state fermentation technology are combined, all-component gradient utilization of lignocellulose is achieved, a green solution is provided for industrial and high-value conversion of lignocellulose, and remarkable economic, social and environment-friendly benefits are achieved.

The utility model discloses paper pulp residue removing equipment for paper product manufacturing, and relates to the technical field of paper product manufacturing. The paper pulp box comprises a paper pulp box body, a pulp conveying pipe is connected to the paper pulp box body, a discharging pipe is connected to the lower surface of the paper pulp box body, a filtering and scraping assembly is connected to the paper pulp box body, a pipeline anti-blocking assembly is fixedly arranged on the lower surface of the paper pulp box body, and the pipeline anti-blocking assembly is in movable contact with the discharging pipe. Impurities in paper pulp can be filtered out through the filter screen plate, in order to avoid blockage of screen holes, the first motor can be started to enable the connecting rod to rotate, and the connecting rod drives the screw rod to rotate, so that the sleeve block can move along the fixed frame and drives the scraper to move, and the impurities on the filter screen plate are scraped off; and the collecting barrel can be detached by rotating a bolt, so that impurities in the collecting barrel can be cleaned.

The utility model discloses a tailing fiber recycling device for a deslagging section. The tailing fiber recycling device comprises a feeding tank, a first multi-section deslagging device, a transverse deslagging device, a second multi-section deslagging device, a white water tank, a slag tank and an accepted pulp tank, a feeding hole of the first multi-section slag separator is communicated with the discharging end of the feeding tank, and a slag outlet in the bottom of the first multi-section slag separator is communicated with a feeding hole of the transverse slag separator; preliminary deslagging and filtering are carried out through the first multi-section deslagging device, filtered slag slurry enters the transverse deslagging device, and white water is pumped into the transverse deslagging device through the white water tank, so that the slag slurry is rotationally separated in the transverse deslagging device; and the formed accepted pulp is automatically returned to the first multi-section slag separator, is discharged from the accepted pulp opening after being subjected to slag discharge, and further fiber recovery is realized through mutual cooperation of the transverse slag separator, the first multi-section slag separator and the second multi-section slag separator, so that the fiber content in the slag pulp is lower, and the utilization rate of the fiber is improved.

The invention relates to the technical field of battery diaphragms, in particular to a wood fiber composite diaphragm and a preparation method thereof. According to the diaphragm, renewable softwood pulp is used as a basic raw material, after aldehyde groups are introduced through sodium periodate oxidation, tannic acid, zinc acetate and cystamine are utilized to synergistically construct a zinc coordination network functional layer; then, molecular crosslinking with methoxypolyethylene glycol, polyethylene glycol, hexamethylene diisocyanate, gamma-aminopropyltriethoxysilane and nano silicon dioxide is realized under the action of a catalyst; and finally, the paper-making and hot-pressing processes are performed to prepare and mold. The diaphragm is particularly suitable for being applied to high-safety and high-performance aqueous metal zinc batteries, and an innovative technical path is provided for industrialization and green upgrading of zinc ion battery diaphragm materials.

The utility model discloses a paper pulp rotational flow high concentration desander relates to papermaking equipment technical field, the paper pulp rotational flow high concentration desander includes feed tee joint, pulp outlet pipe, conical liner, shell and sediment tank, feed tee joint's pulp inlet channel is arranged along feed tee joint's side wall tangential direction, feed tee joint's barrel inner wall is fixed with the helical blade that is distributed along the axial direction, feed tee joint's barrel inner wall is fixed with feed tee joint's feed tee joint's barrel inner wall is fixed with feed tee joint's feed tee joint's feed tee joint's feed tee joint's feed tee joint's feed tee joint's feed tee joint's feed tee joint's barrel inner wall. The spiral blades surround the circumferential direction of the slurry outlet pipe arranged in the axial direction, the inner wall of the feeding three-way barrel, the spiral blades and the pipe wall of the slurry outlet pipe define a spiral downward flow guide channel, the rotating direction of the flow guide channel is consistent with the cut-in direction of the slurry inlet channel, and conical spiral edges distributed in the axial direction are fixed to the inner wall of the conical container. The spiral blades, the flow guide channel and the conical spiral edges are arranged, slurry flows down along the flow guide channel after entering the sand remover in the tangential direction, the stability of rotational flow is improved, the slurry with stable rotational flow enters the conical container and is guided by the conical spiral edges, the inertia of centrifugal force and the stability of the direction are kept, and stable separation of impurities and the slurry is guaranteed.

The invention relates to a sieve device (1) with at least one retention element (3, 13, 4, 14) for cleaning a suspension of contaminants, wherein the sieve device (1) comprises a shaft that can be driven rotatorily by a drive, wherein at least one retention element extends radially from the shaft, wherein flowable spaces (8) are formed by the at least one retention element (3, 13, 4, 14) and a sieving effect is provided by the flowable spaces (8).

The invention belongs to the technical field of wormwood material treatment, and particularly relates to a physical preparation method and application of wormwood active micro-nano cellulose, wormwood processing waste is pretreated, liquid nitrogen ultra-low temperature crushing is adopted, and the ultra-low temperature can avoid structural damage and performance change of cellulose due to too high temperature; then, in the multi-physics field coupling dissociation process, the stress effects of high-frequency vibration of an ultrasonic field, a shearing field and a freeze-thaw cycle field cooperate to effectively destroy the aggregation state structure of the cellulose, so that efficient dissociation of the cellulose is realized, the dispersity and activity of cellulose nanofibers are improved, and then directional self-assembly is performed through an ice crystal template method, so that the cellulose nanofibers are obtained. The preparation method comprises the following steps: introducing cellulose nanofibers to form a bionic porous structure, accurately regulating and controlling the pore structure and form, and finally obtaining wormwood active micro-nano cellulose by combining a high-pressure micro-jet homogenizing process, so that the material has a relatively large specific surface area and excellent mechanical properties, and the bioactive components of wormwood are reserved to the greatest extent through an innovative physical synergy technology.

The utility model discloses a poplar chemi-mechanical pulp i-CTMP pulping system which comprises a steaming bin, a metering spiral scale is arranged at an outlet in the bottom of the steaming bin, the output end of the metering spiral scale is communicated with a reversing conveying structure, the output end of the reversing conveying structure is communicated with a spiral feeder, the output end of the spiral feeder is communicated with a transverse pipeline of a T-shaped pipe, and the transverse pipeline of the T-shaped pipe is communicated with a horizontal pipeline of the T-shaped pipe. A non-return structure is arranged in the transverse pipeline, a vertical pipeline of the T-shaped pipe is communicated with the high-temperature softening pipe, the output end of the high-temperature softening pipe is communicated with the balancing bin H, and a side feeding spiral conveyor is arranged at a side output port of the balancing bin H. The metering spiral scale conveys materials conveyed by the steaming bin into the spiral feeder through the reversing conveying structure, the materials are extruded into material plugs in the spiral feeder, the material plugs are conveyed into the T-shaped pipe, then the material plugs enter the high-temperature softening pipe to be subjected to high-temperature steaming and softening, the softened material plugs enter the balancing bin, and chemical medicines are pre-placed and subjected to high-temperature softening, so that the quality of the chemical medicines is improved. And the pulping energy consumption of the subsequent high-concentration pulping machine is reduced.

The present application belongs to the technical field of fruit by-product processing, and particularly relates to a method for extracting cellulose, pectin and polyphenol from pear by-product. The present application utilizes the thermo-mechanical-chemical effect of steam explosion to treat the pear by-product through steam explosion, so that most of hemicellulose and lignin can be removed, and the cellulose, pectin and polyphenol can be efficiently and rapidly extracted, thereby shortening the production cycle of the cellulose, pectin and polyphenol and improving the efficiency. Furthermore, the present application uses a combination of choline chloride and ethanol as a low eutectic solvent, and compared with other types of hydrogen bond acceptors and hydrogen bond donors, the polyphenol extraction effect is the most significant. The present application provides a method for laying a foundation for further development and utilization of pear residue cellulose, pectin and polyphenol, and improves the comprehensive utilization rate of pear processing by-products.

The utility model relates to the technical field of deslagging separation, and discloses a deslagging separation device for paper pulp purification, which comprises a main body assembly and a base, a shell is fixed on the base, and a discharge port is fixed in the base; the discharging assembly is located on one side of the discharging port and comprises a discharging piece, a pushing piece is arranged on the discharging piece, the discharging piece comprises a discharging plate arranged at the bottom of the discharging port, and a side plate is fixed to one side of the discharging plate. The discharging device has the advantages that the baffle capable of being triggered to rotate and the rotating plate are arranged on the discharging plate, when waste materials are gathered to a certain amount on one side of the baffle, gravity triggers the baffle to rotate, the rotating plate is driven to synchronously act, the accumulated waste materials are automatically pushed to fall down, and after the collected waste materials are discharged, the baffle and the rotating plate can automatically reset. And through the combined design of the baffle and the side plates, splashing waste materials during discharging can be effectively blocked, the waste materials are concentrated on one side of the baffle, and the situation that the waste materials are scattered to pollute a working area is avoided.

The application discloses a mica sheet pulping device and method, and belongs to the technical field of mica papermaking, which comprises a reaction kettle, a first filtering device and a second filtering device which are sequentially arranged, and mica liquid after reaction of the reaction kettle is filtered through the first filtering device and the second filtering device in sequence; wherein the reaction kettle comprises a feeding piece arranged in the inside, the bottom end of the feeding piece is close to the bottom wall of the reaction kettle, and a plurality of discharging parts are arranged on the surface of the feeding piece and used for introducing the reagent into the inside of the reaction kettle; the technical effect achieved by the improved scheme is that: after the concentrated sulfuric acid is introduced, the concentrated sulfuric acid and the mica are allowed to react, the reaction effect is improved, the residual sulfuric acid in the introduction pipeline is reduced, the subsequent filtering operation is facilitated, when the residues are cleaned, the bottom plate is pulled, all the residues can be taken out at one time, the efficiency is higher, and the direct contact of the hands of workers can be reduced.

This utility model discloses a papermaking tail pulp recovery device, relating to the technical field of tail pulp recovery equipment. It includes a primary separation cylinder, a pulp inlet pipe, and a primary overflow pipe. A separating cylinder, corresponding to and connected to the inlet end of the primary overflow pipe, is fixed on the inner wall of the top of the primary separation cylinder. It also includes a reinforced buffer mechanism to reduce the impact of the tail pulp on the separating cylinder. The reinforced buffer mechanism includes a damping plate attached to the wall of the separating cylinder, an mounting part for conveniently assembling the damping plate to the cylinder body, and a reinforcing part for increasing the connection strength between the separating cylinder and the inner wall of the top of the primary separation cylinder. The pulp inlet pipe corresponds to the damping plate. This utility model, through the installation of the damping plate, can effectively suppress the shaking caused by tail pulp scouring, reduce the stress at the connection between the separating cylinder and the primary separation cylinder, and reduce the risk of the separating cylinder falling off due to long-term impact.

The invention discloses cellulose-based aerogel as well as a preparation process and application thereof, and relates to the technical field of ecological restoration of water bodies. The preparation process of the cellulose-based aerogel comprises the following steps: removing impurities from garden wastes, washing, drying and crushing to obtain raw material powder; extracting cellulose from the raw material powder by coupling physical, chemical and enzymolysis modes; the preparation method comprises the following steps: loading carboxyl on cellulose, and combining copper ions, quaternary ammonium salt cations and a high-molecular polymer containing amido with the carboxyl to obtain a gel material; the gel material is subjected to freeze drying treatment, and the cellulose-based aerogel is obtained. The prepared aerogel has excellent effects of organic matter adsorption, heavy metal adsorption and algae resistance.

The present disclosure is directed to rotors for pressure screens with cylinders for screening solid contaminants from a solid slurry. The rotor comprising a cylindrical hub, at least one foil spaced radially outward from the cylindrical hub, and at least one strut coupling the at least one foil to the cylindrical hub, wherein the at least one strut is a forward-swept strut having a forward edge. Additionally disclosed are methods of using the rotor.

The present invention relates to an apparatus for cleaning a fiber suspension, the apparatus having a plurality of hydrocyclones (1) arranged side by side in a row, each hydrocyclone having at least one inlet connector (2), at least one qualified material connector (3) and at least one waste material connector (4), the apparatus having at least one supply manifold (5) and / or at least one qualified material manifold (6) and / or at least one waste material manifold (7), the supply manifold being connected to the plurality of inlet connectors (2) to supply the fiber suspension, the qualified material manifold being connected to the plurality of qualified material connectors (3) to discharge qualified material, and the waste material manifold being connected to the plurality of waste material connectors (4) to discharge waste material, wherein the manifolds (5, 6, 7) are designed to be elongated and the corresponding connectors (2, 3, 4) are connected to the corresponding manifolds (5, 6, 7) on their longitudinal sides. Deposition in the manifolds (5, 6, 7) should be suppressed by means that at least one end of the manifold (5, 6, 7) after the last hydrocyclone (1) is introduced into or out of the manifold (5, 6, 7) through a flushing joint (8).

The invention relates to the technical field of cellulose composite materials, in particular to a preparation method of a temperature-adjustable transparent plate based on corn straw. The preparation method comprises the following steps: (1) purifying corn straws to prepare corn straw cellulose hydrogel; (2) permeation treatment: dipping the corn straw cellulose hydrogel obtained in the step (1) in colored epoxy resin, and carrying out vacuumizing-releasing repeated operation; and (3) curing and molding: flatly laying the product in the step (2), and curing at room temperature. According to the preparation method, the purification effect on the cellulose in the corn straw is excellent, and the prepared green building board has remarkable temperature adjusting and light transmitting performance and has high application value in the field of building design and product design.

The invention relates to a closure device (1) intended to close an opening (21) of a fluid-supply nozzle (2), the device consisting of a rotor (3) comprising at least one blade (4) carried by a shaft whose axis of rotation (5) is parallel to the axis (22) of the nozzle, the blade alternately closing and opening the opening of the nozzle as it rotates. The blade comprises a closing edge (6) for closing the opening (21), formed by the edge of the blade which, when the nozzle is closing, first comes into alignment with the nozzle, and an opening edge (7) corresponding to the edge of the blade opposite the edge of the blade forming the closing edge, the blade (4) having an asymmetric design.

The present invention relates to a water and air separation device (100) comprising- an entry portion (10) having a receiving inlet (11),- a guide portion (20) comprising- a housing (24),- a separation chamber (40),- an inlet (21),- a plurality of guide channels (12) for transporting whitewater spray into the separation chamber, - a liquid outlet (22),- a gas outlet (23),and wherein the guide portion (20) further comprises - a first separation plate (41) arranged to divide the separation chamber (40) into a first section (A) and a second section (B), so that a connecting passage (46) is formed for allowing whitewater to pass into the second section (B) underneath the first separation plate (41) and thereby separate the whitewater from air of the whitewater spray.

The invention relates to a hydrocyclone device (1) for centrifugal separation of solids from a suspension, comprising at least one first hydrocyclone (2.1), at least one second hydrocyclone (2.2) and a common feed chamber (10) with a feed opening (10a) for introducing a suspension feed stream into the common feed chamber (10) and a plurality of flow outlets (11.1, 11.2, 11.3, 11.4) corresponding to the first and second hydrocyclones (2.1, 2.2) for leading respective shares of the suspension out of the common feed chamber (10) into first and second inlets (4.1, 4.2) of the first and second hydrocyclones (2.1, 2.2), wherein the common feed chamber (10) is designed as an annular chamber to which the feed opening (10a) is connected in order to form a circulation.

The utility model relates to waste paper pulp desanding equipment, which comprises a base and a cyclone desander arranged on the base, the top of the cyclone desander is provided with a water inlet pipe and a water outlet pipe, the bottom of the cyclone desander is provided with a sand outlet, a settling basin is connected below the sand outlet, the settling basin is in an inverted cone shape, and the settling basin is provided with a water inlet pipe and a water outlet pipe. An overflow pipe is arranged at the top of the sedimentation tank, a spiral conveying mechanism is obliquely arranged on one side of the sedimentation tank, the discharging end of the spiral conveying mechanism extends out of the sedimentation tank, a screen is obliquely arranged in the sedimentation tank, and magnets are distributed on grids. The desanding equipment for the waste paper pulp can be used for recycling metal in the paper pulp.

The application belongs to the field of comprehensive utilization of biomass, and relates to a method for preparing nanocellulose based on dissociation of biomass in an ionic liquid / water system. Cellulose fibers are added to a binary system composed of ionic liquid and water, and are heated and stirred under high pressure to obtain a cellulose dispersion liquid, which is regenerated and dried to obtain nanocellulose. Compared with the prior art, the process provided by the application is simpler, greener and more efficient. The raw material used in the application belongs to renewable resources, and the nanocellulose prepared therefrom can be widely applied in medicine, fine chemical industry and preparation of new materials, thereby providing a new method for efficient utilization of renewable resources.

This utility model relates to the field of insulating paper production technology and discloses a pulp filtration device for insulating paper production, including a support frame, a recycling frame placed on the inner wall of the support frame, a filter frame fixedly installed on the inner wall of the support frame, a filter screen disposed in the filter frame, and a control component disposed in the support frame. In this pulp filtration device for insulating paper production, when the output shaft of the motor drives the circular plate to rotate on the side of the support frame, the movable rod hinged to the surface of the circular plate can be folded and push the connecting rod to move longitudinally on the surface of the vertical rod. During the movement of the connecting rod, the support frame fixed at the bottom of the connecting rod and the support rod can simultaneously be longitudinally squeezed within the filter frame, applying pressure to the pulp. This can push the free water and some bound water in the pulp to quickly pass through the filter screen, thereby breaking the bottleneck of the filter cake layer that hinders water penetration and avoiding the impact of increased resistance on filtration efficiency.

The utility model relates to the technical field of pressurized screens, in particular to an upper cover of a pressurized screen and the pressurized screen, the top end and the bottom end of the upper cover are provided with a slag outlet and a slag inlet respectively, the slag outlet and the slag inlet are communicated with the interior of the upper cover to form a slag outlet channel, and a spiral guide-out strip is arranged on the inner wall of the upper cover. The rotating direction of the spiral guide-out strip is the same as the rotating direction of a rotor of the pressure screen, light slag entering the upper cover can quickly pass through the slag outlet channel under the inertia of the light slag, and is discharged from the slag outlet, the upper cover is further provided with a flushing water pipe, and the flushing water pipe is connected with water supply equipment and flushes water into the slag outlet channel in the direction tangent to the outer circle of the upper cover. And the flushing direction is also along the rotating direction of the rotor of the pressure screen, so that the light slag in the slag discharging channel is further driven to be quickly discharged along the spiral guide-out strip.

The utility model relates to the technical field of separating devices, and discloses an efficient paper pulp fiber separating device which comprises a box body, a cover plate is fixedly installed on the top of the box body, a feeding cylinder is arranged in the middle of the cover plate in a communicated mode, and a driving motor is fixedly installed in the middle of the lower surface of the box body. A discharging pipe is arranged on one side of the bottom of the box body in a communicating manner, and a valve is mounted on the discharging pipe; bottom plates are fixedly mounted on the inner sides of transmission shafts of the driving motors. Through the arrangement of the spray head, the spray holes and the pump body, water can be supplied to the spray head through the pump body via the hose, water in the spray head is sprayed out of the spray holes and sprayed to the filter holes of the filter cartridge, pressurized water can wash off impurities or slurry at the bottoms in the filter holes, meanwhile, the filter cartridge can be comprehensively cleaned through a filter cartridge rotating structure, and the continuous anti-blocking water spraying design can be used for cleaning the filter cartridge. The separating and filtering efficiency can be effectively improved.

The utility model relates to the technical field of papermaking equipment, in particular to a drum screen which comprises a screen drum, an inlet drum body and an outlet drum body. A retainer ring and a transmission part are respectively arranged on the inlet cylinder and the outlet cylinder, and the transmission part is matched with the transmission device; the screen drum comprises screen strips and ribs, clamping grooves are formed in the peripheries of the outer portions of the screen strips, clamping strips are arranged on the inner sides of the ribs, the clamping strips are matched with the clamping grooves, reinforcing transverse ribs and reinforcing longitudinal ribs are arranged on the screen drum and fixedly connected with the screen strips and the ribs respectively, and spiral pieces are arranged in the drum screen. A material lifting plate is arranged between the screw pitches of the spiral sheets; and meanwhile, backflow holes are formed in the spiral sheets at the screen drum and the outlet drum body. The screening device is simple to manufacture, not easy to block and convenient to use and clean, can effectively ensure the uniformity of screening seams and the product quality, can improve the yield of accepted pulp, contributes to increasing the productivity and reducing the cost, and is convenient to use in production.