1616 results about "Filter press" patented technology

The invention relates to the technical field of sewage treatment, and discloses spodumene flotation tailing water treatment equipment which comprises a plate-and-frame filter press and a feed flow real-time control system electrically connected with the plate-and-frame filter press. According to the system, a slurry characteristic coefficient, a power supply coefficient, a dynamic matching coefficient and a filter cloth state coefficient are respectively obtained in real time through a slurry state evaluation module, a power evaluation module, a process dynamic matching module and a filter cloth state evaluation module. And dynamically calculating and adjusting the target feeding flow by the feeding flow adjusting and controlling model according to the coefficients. According to the invention, through multi-parameter collaborative sensing and intelligent matching, the dynamic adaptation of the feed flow, the slurry characteristics, power supply and the state of the filter cloth is realized, the technical problems of poor adaptability, control lag, easy damage of the filter cloth and high energy consumption of the traditional plate-and-frame filter press under complex working conditions are effectively solved, and the treatment efficiency and the operation stability are remarkably improved.

Coffee Filter Press Apparatus

The utility model discloses a full-automatic operation control system for filter pressing, water washing and squeezing of a diaphragm filter press, which is characterized in that an inlet of a slurry liquid filter pressing pump is connected with a to-be-pressed filtrate storage tank, an outlet of the slurry liquid filter pressing pump is connected with a liquid inlet of the filter press through a liquid inlet valve V1, and an inlet of an on-machine water washing filter pressing pump is connected with an on-machine washing water storage tank; the outlet is connected with the water inlet of the filter press through a water inlet valve V3; an inlet of the squeezing water delivery pump is connected with the squeezing water tank, an outlet of the squeezing water delivery pump is connected with the filter press, the front end of the pulp filter press pump and the front end of the squeezing water delivery pump are respectively provided with the frequency converter, and the pulp filter press pump, the filter press, the on-machine washing filter press pump, the squeezing water delivery pump, the liquid inlet valve V1 and the water inlet valve V3 are respectively connected into the control cabinet. And the control cabinet is used for controlling the starting, stopping and switching of the slurry filter press pump, the filter press, the on-machine washing filter press pump, the squeezed water delivery pump, the liquid inlet valve V1 and the water inlet valve V3. According to the utility model, full-automatic start-stop switching control of filter pressing, water washing and squeezing of the diaphragm filter press in hydrometallurgy can be realized.

The invention discloses a horizontal squeezing dehydrator, which belongs to the technical field of squeezing dehydrators, and comprises a rack, a filter pressing device, a filter cloth group and a driving device, a feeding area, a filter pressing area and a discharging area are arranged on the rack; the filter cloth group can move among the feeding area, the filter pressing area and the discharging area, and comprises first filter cloth and second filter cloth; the driving device comprises a first driving mechanism and a second driving mechanism, the first driving mechanism drives the first filter cloth to move, and the second driving mechanism drives the second filter cloth to move; the filter pressing device comprises a pressing plate assembly, a power mechanism and a filter plate, the pressing plate assembly comprises a first pressing plate and a second pressing plate, and the first pressing plate, the second pressing plate and the filter plate are all vertically arranged; the first pressing plate, the filter plate and the second pressing plate are used for sequentially bypassing the filter cloth group in an up-and-down reciprocating manner, so that the first filter cloth and the second filter cloth are attached to each other in the filter pressing area. The filter plates are vertically arranged and arranged in the horizontal direction, different from a vertical sludge squeezing dehydrator, the squeezing pressure is not limited, the dehydration effect is good, the mud cake thickness is small, and the water content is low.

The invention relates to the technical field of wet-process phosphoric acid, and discloses a wet-process phosphoric acid grading and arsenic removal treatment method and system, and the system can be switched between a parallel grading treatment mode and a series depth treatment mode through flow control; in the parallel mode, the two arsenic removal reaction tanks operate independently to respectively treat different raw materials and produce desulfurized acid for industrial monoammonium and low-arsenic dilute phosphoric acid for high-phosphorus compound fertilizer, the low-arsenic dilute phosphoric acid is mixed and blended with untreated dilute acid and then concentrated, qualified products are obtained with the minimum treatment capacity, and the cost is remarkably reduced; in the series connection mode, raw materials sequentially flow through the two tanks to be deeply purified, and single high-quality phosphoric acid is produced; the two modes are both integrated with efficient filter pressing units, solid-liquid separation is carried out on arsenic-containing thick slurry generated by arsenic removal, and phosphorus resource recovery and arsenic pollution control are achieved; the device has production flexibility and deep purification capacity, perfectly meets the requirements of raw material fluctuation and multiple products, and thoroughly solves the problem of arsenic slag disposal.

The invention discloses an efficient preparation process of cryolite, and relates to the field of cryolite preparation. The process comprises the following steps: S1, taking carbon residues ground by a ball mill, and putting the carbon residues into a dissolution reaction kettle filled with alkali liquor for reaction; s2, after the reaction in the reaction kettle is finished, filter pressing is performed through a plate-and-frame filter press, and coarse carbon powder and filtrate are obtained; s3, pumping the filtrate into a carbon reaction kettle, and introducing carbon dioxide for reaction; s4, after the reaction in the carbon component reaction kettle is finished, carrying out filter pressing through a plate-and-frame filter press; and S5, drying the solid material obtained by filter pressing in a calcining furnace to obtain cryolite. In the process, the industrial waste carbon residue is used as a raw material, and participates in a series of reactions to prepare the cryolite after being subjected to ball-milling refining treatment, so that resource recycling of the waste is realized. The method not only effectively reduces the pollution of the carbon residue to the environment, reduces the accumulation amount of solid wastes, but also reduces the exploitation of natural cryolite minerals, and protects non-renewable resources.

The invention relates to an intelligent filter press control method based on multi-source data, and belongs to the technical field of sludge water treatment. The method comprises the following steps: constructing a theoretical instantaneous filtering rate capable of accurately reflecting a scene state according to the characteristics of a filter press operation scene, taking the theoretical instantaneous filtering rate as a reference parameter, and then determining the value correlation of each state parameter relative to the reference parameter at each sampling moment and the time hysteresis of the value change; therefore, the dynamic weight of each state parameter during multi-source data fusion in the continuous control process of the filter press is quantified, and the condition that the most effective and timely response state parameters are preferentially adopted to control the filter press when the working condition changes is ensured. Therefore, the time sequence characteristic that the pressure data is abnormal before the flow data is abnormal when the filter cloth is blocked can be effectively captured, the rigidity defect of fixed weight distribution in a filter pressing scene is fundamentally overcome, and the response speed and the control precision of filter press control are improved.

The invention relates to the technical field of sludge treatment, in particular to a sludge dewatering and filter pressing device capable of preventing mud cake adhesion and a filter pressing method thereof.The sludge dewatering and filter pressing device comprises a machine table and transverse plates fixed to the machine table and symmetrically arranged, and linear rails are arranged on the transverse plates; the multiple filter plates are distributed at equal intervals, and extension frames which are symmetrically arranged and are in sliding connection with the linear rails are arranged on the side walls of the filter plates; the translation assembly is arranged on the transverse plate, and a movable plate is connected to the translation assembly; the lifting vibration mechanism is arranged on the movable plate, the lifting vibration mechanism is connected with a loader, the movable plate is further provided with a follow-up deflection mechanism connected with the lifting vibration mechanism, and through cooperation of the lifting vibration mechanism and the follow-up deflection mechanism, the loader can be controlled to move to the position matched with the extension frame; and the mud cake on the filter plate is separated from the filter plate in a vibration and deflection motion mode.

The invention relates to the technical field of sludge filter pressing, in particular to a sludge filter pressing system based on automatic operation, which is characterized in that a dynamic monitoring module is used for acquiring a falling track of a filter plate according to a falling image of the filter plate so as to determine a falling expression length interval of a filter cake falling to a conveying belt; whether the filter cake falling process is abnormal or not is judged through a feature recognition module, falling state characterization vectors of the filter cake at all falling positions are constructed through an abnormality analysis module, and the filter cake recognition state is determined according to the comparison result of the falling state characterization vectors; sludge filter pressing is automatically adjusted through the filter pressing management module, pushing parameters of a high-pressure medium in a filter plate interlayer are adjusted, or the washing unit is controlled to carry out pressurized washing on characteristic marking filter cloth, and then abnormal adhesion attributes are distinguished by dynamically monitoring and analyzing a filter cake falling track and deviation characteristics; the sludge filter pressing process is self-adaptively regulated and controlled, and the continuous filter pressing stability of the sludge is improved.

The utility model belongs to the technical field of concentrating mill production water treatment, and relates to a concentrating mill middling overflow water muddy flow disposal system which comprises a 65-meter thickener used for treating magnetic separation tailings, and underflow of the 65-meter thickener is provided for bulk flotation equipment; the 65-meter thickener overflow weir is used for introducing overflow water of the 65-meter thickener; the 53m thickener is used for introducing the overflow water into an overflow weir of the 65m thickener; the filling or filter pressing device is used for introducing underflow of the 53m thickener; the overflow weir of the 53-meter thickener is used for introducing overflow water of the 53-meter thickener; the collecting water tank is used for introducing the overflow water in the overflow weir of the 53-meter thickener; the high-level water tank introduces water in the water collecting tank through a high-pressure water pump; and the flocculating agent device is used for providing a flocculating agent for the 53-meter thickener. And the effect of settling the argillaceous ore pulp is achieved.

Disclosed in the present invention is a filter press device for a phosphate concentrate. The filter press device comprises a filter press mechanism, an angle adjustment mechanism and a knocking mechanism, wherein the filter press mechanism comprises a plurality of filter plates and a plurality of filter cloths, with all the filter plates being arranged vertically and in parallel and being movable in a horizontal plane, such that the filter plates are in a mutually abutting or mutually separated state, and the filter cloths being arranged on two sides of the corresponding filter plates; the angle adjustment mechanism is detachably fixedly connected to all the filter plates that are in the mutually separated state, and is configured to drive all the filter plates to swing synchronously, thereby adjusting the inclination angles of the filter plates; and the knocking mechanism is configured to knock the filter plates swinging to the highest position. The present invention has the following beneficial effects: by means of knocking each filter plate by using the knocking mechanism, phosphate concentrate powder adhering to the filter cloths falls off, thereby improving the discharge effect and ensuring the production efficiency; and there is no longer any need for workers to use brushes to brush off the phosphate concentrate powder adhering to the filter cloths.

The invention relates to the technical field of sludge treatment and recycling, in particular to a novel sludge conditioner for a novel filter press, which is prepared from the following components in percentage by weight: 15 to 30 percent of modified humate, 5 to 12 percent of compound enzyme preparation, 8 to 20 percent of zwitterionic polymeric flocculant, 20 to 40 percent of inorganic skeleton construct, 3 to 10 percent of oxidant and 10 to 25 percent of hydrophobic modified mineral particles. And the balance of pH regulator and deionized water. According to the novel sludge conditioner disclosed by the invention, by compounding modified humate and other core components, a synergistic action mechanism is constructed, so that the water content of a sludge filter cake is less than or equal to 50-60%, the weight of the filter cake is reduced by over 20%, the COD (Chemical Oxygen Demand) of filtrate is reduced by over 30%, the novel sludge conditioner is adaptive to various filter presses, the filter pressing period is shortened by over 15% through an optimized conditioning process, the productivity is improved, and the treatment cost and the environmental protection pressure are reduced.

The invention discloses a plate-and-frame filter press for a sludge dewatering machine room, which comprises alternately arranged filter plates, filter frames and filter cloth covering the filter plates, vibration support hole groups are arranged in grooves of the filter plates along diagonal lines, and hydraulically driven vibration support components are arranged in the holes; when the filter plate and the filter frame are in press fit, the hydraulic lifting mechanism pushes the vibration supporting assembly to jack the filter cloth to prevent sinking, and the built-in micro servo motor drives the arc-shaped vibration block and the groove to be meshed / separated periodically, so that the vibration supporting plate vibrates longitudinally to dredge filter cloth meshes and promote a filter cake to fall off. Anti-collapse supporting and on-line vibration cleaning of the filter cloth are achieved, the blocking problem can be solved without disassembling the machine, and the dewatering efficiency is remarkably improved.

The application discloses a filter plate handle, a plug-in shaft extends from the two side surfaces of a fixed plate and is fixedly connected to the fixed plate, the part extending from the two side surfaces of the fixed plate is respectively a first section and a second section, the first section of the plug-in shaft can be inserted into the insertion hole of the filter plate in interference fit, precise alignment assembly with the filter plate is ensured, the second section of the plug-in shaft is provided with a wear-resistant block, the wear-resistant block is used for contacting a main beam and sliding support is provided by the wear-resistant block, the fixed plate is provided with at least two bolt holes, and the fixed plate is fixedly connected to the filter plate through the at least two bolts, further reinforcement is realized, the first section of the plug-in shaft and the filter plate are connected in interference fit to realize the first fixing, the second fixing is realized through the bolts, and the plug-in shaft and the filter plate are kept in interference fit, precise alignment installation of the handles on the two sides of the filter plate is ensured.

Device for treating precipitated sludge sediment from wastewater treatment, in particular wastewater from paints and varnishes and / or coating materials and / or liquid special waste, comprising chamber filter presses with filter cloths through which the precipitated sludge sediment is to be treated, wherein at least one removable precoat layer of a filtration aid in a predetermined concentration is applied to each filter cloth.

The invention discloses a multi-stage separation synergistic power coal washing process, and belongs to the technical field of coal washing processing. The TDS intelligent dry separation system, the dry-wet combined desliming process, the super coal slime classification cyclone, the super coal slime dense medium cyclone and the ultrahigh-pressure elastic squeezing filter press are in multi-stage cooperative linkage to be used for power coal washing, the moisture content and the ash content are reduced to the maximum extent in the separation stage, and the heat productivity of the power coal is increased. Compared with a process before improvement, the power coal washing process with cooperation of multi-stage separation has the advantages that the gangue sorting efficiency and the power coal productivity are improved, the super coal slime dense medium cyclone, the super classification cyclone and the ultrahigh-pressure elastic squeezing filter press are orderly used in the power coal washing process, the water content of a filter cake is greatly reduced, and the water content of the filter cake is greatly reduced. The water content of the filter cake is obviously superior to that of a common quick-opening membrane filter press and is lower than that of the filter cake of dried coal slime, so that the fluctuation range of the heat value of the power coal is lower, the heat value of gangue is reduced, and the heat value of the power coal is improved.

The invention discloses alternate double-pressing cage sludge treatment filter pressing equipment, and belongs to the technical field of sludge filter pressing treatment equipment. Alternating type double-pressing-cage sludge treatment filter pressing equipment comprises a supporting seat and a frame body fixedly installed on the surface of the supporting seat, the surface of the frame body is correspondingly connected with a filter pressing cage A and a filter pressing cage B in a sliding mode, a plurality of through holes are formed in the surfaces of the filter pressing cage A and the filter pressing cage B, and rolling wheels are rotationally connected to the four corners of the bottom face of each of the filter pressing cage A and the filter pressing cage B; trapezoidal blocks are fixedly mounted in the middles of the bottom surfaces of the filter pressing cage A and the filter pressing cage B, and penetrating type sliding frames are slidably connected to the surfaces of the frame body. Compared with the traditional partial alternating type pressure filtration equipment, the alternating type double-pressing cage sludge treatment pressure filtration equipment has the advantages that the stable movement of the pressure filtration frame is ensured, the bumping of the pressure filtration frame in the movement process is prevented, the damage to the wheels and the track is reduced, the service life of the equipment is prolonged, and meanwhile, the sludge pressure filtration treatment efficiency of the pressure filtration equipment is also improved.

The application belongs to the field of fine chemical industry and environmental protection, and particularly relates to a method for preparing metal triflate by using high gravity reaction. The method comprises the following steps: 1, using trifluoromethylsulfonyl chloride and anhydrous HF gas as raw materials to generate trifluoromethylsulfonyl fluoride gas; 2, performing gas-liquid contact reaction of the trifluoromethylsulfonyl fluoride gas with an alkali metal solution to obtain a mixed solution; 3, performing solid-liquid separation on the mixed solution by using a filter press, and the liquid phase is a triflate salt solution; 4, drying the triflate salt solution by using a spray dryer to obtain a solid-phase product triflate salt. The method uses trifluoromethylsulfonyl chloride and anhydrous HF as raw materials to replace triflic acid in the traditional method, and utilizes high gravity reaction, so that the production cost is greatly reduced. The process is simple, the obtained product triflate metal salt has low impurity content, is superior to the industry standard, the process is zero emission, and has good economic value and social value.

The invention provides a welding device for filter press roller machining, and belongs to the technical field of roller welding. The welding device comprises a workbench, a spindle box is installed on the workbench, a spindle is installed in the spindle box, a chuck is installed at the end of the spindle, a centering hold-down mechanism is arranged on the workbench, longitudinal moving assemblies are arranged at the two ends of the workbench respectively, and a fixing rod is fixed between the two longitudinal moving assemblies; a clamping mechanism is arranged on the fixing rod; the clamping mechanism comprises two mounting plates fixed to the fixing rod, a clamping assembly is arranged between the two mounting plates, and the clamping assembly comprises a lower clamping base plate and a driving mounting base which are fixed between the mounting plates; a lower clamping seat is arranged at the end part of the lower clamping base plate; an automatic telescopic cylinder I is mounted on the driving mounting seat, an upper clamping seat is hinged to the moving end of the automatic telescopic cylinder I, and a guide rod is fixed on the upper clamping seat; the problem that angle steel postures are prone to deviation in the traditional welding and positioning process can be solved, and the welding precision and consistency are improved.

The invention discloses a white spirit fermentation byproduct recovery device, and relates to the technical field of white spirit equipment.The white spirit fermentation byproduct recovery device comprises a first supporting frame, a stirring and filter pressing structure is arranged on the upper portion of the first supporting frame, a quantitative discharging structure is arranged on the upper portion of the stirring and filter pressing structure, and a crushing device is arranged on the upper portion of the quantitative discharging structure; a purification structure is arranged at the lower part of the stirring and filter pressing structure. According to the by-product recovery device for Baijiu fermentation, manual feeding is combined with mechanical automation, vinasse is rapidly crushed by a crushing roller to prevent blockage, quantitative discharging is achieved, a leavening agent is synchronously mixed, the process is simplified, and material stability is guaranteed; during filter pressing, a servo motor cooperates with multiple structures, uniform pressure is applied to improve efficiency, scraping strips clear residues, stirring blades eliminate dead angles, and buffer design protects equipment; liquid is primarily filtered and deeply filtered, the angle of the movable bin is adjusted to ensure thorough purification, manpower is greatly reduced through automation, the purified liquid can be recycled, and the treatment efficiency and the resource utilization rate are integrally improved.

The invention provides an efficient copper electrolysis anode slime dehydration method, belongs to the technical field of filter pressing, and solves the problem that whether a diaphragm of an anode slime filter press leaks or not cannot be detected in the existing anode slime dehydration use process. Adjusting the water pressure to a target pressure value through an overflow valve; a pressure sensor on the anode mud dehydration device is used for monitoring and feeding back the pressure in a diaphragm in real time, and punching is adjusted or stopped according to data fed back by the pressure sensor arranged between the water storage tank and the multi-stage centrifugal pump; accumulated water in the diaphragm is discharged to the water storage tank through the water return valve for collection and utilization, and the radar liquid level meter monitors the liquid level of the water storage tank. According to the method, the diaphragm pressure of the anode mud dehydration device is set and monitored, the diaphragm state is detected in real time, the dehydration effect is ensured, the water supplementing function is achieved, the dehydration efficiency is improved, the monitoring capacity is enhanced, automatic operation is achieved, and equipment and facilities are protected against corrosion.

The utility model provides a mycoprotein production system which is characterized by comprising a building body on which a steel frame platform is built; the slurry mixing tank is fixed on the building body; the plurality of fermentation tanks are fixed on the building body, and a second conveying pipe is arranged between the slurry mixing tank and the fermentation tanks; the belt filter press is connected with the fermentation tank; the slurry mixing tank, the fermentation tank and the belt filter press are provided with odor collecting pipelines, the building body is further provided with a dosing assembly which is connected with the fermentation tank, and the building body is provided with a tap water assembly connected with the slurry mixing tank.

The utility model belongs to the technical field of vertical filter presses, and particularly discloses a spray cleaning device for a vertical filter press. The spray cleaning device mainly comprises a guide rail, a driving mechanism, a base, a motor mounting seat, a washing spray gun and the like, the guide rail is arranged in the horizontal direction, the base is connected with the guide rail through the driving mechanism, the driving mechanism is used for driving the base to move in the extending direction of the guide rail, and a first rotating motor and a second rotating motor are arranged at the bottom of the base; the spraying angle of the washing spray gun is adjusted. According to the spray cleaning device disclosed by the utility model, the washing spray gun is hung at the bottom of the base, and the driving mechanism provides power to drive the base to transversely move along the guide rail, so that the filter press is cleaned, and meanwhile, the first rotating motor and the second rotating motor are additionally arranged; and the flushing angle of the flushing spray gun can be adjusted, and the spraying and cleaning effect is effectively improved.

The utility model belongs to the technical field of filter presses, and particularly relates to a filter press capable of assisting in discharging, which comprises a support frame, a booster pump, a baffle and a filter plate, the supporting frame is connected with a booster pump through a bracket, one side of the booster pump is connected with a baffle, the baffle is connected to the supporting frame through a bolt, one side of the baffle abuts against a filter plate through a sealing gasket, one side of the baffle abuts against a pressing plate through a sealing gasket, and the filter plate and the pressing plate are slidably connected to the supporting frame through an L-shaped plate and a transverse rod; a hydraulic rod is connected to one side of the pressing plate and connected into the supporting frame in a penetrating mode. The servo motor is started to align the clamp with the clamping plate on the filter plate, the electric push rod is started to place the clamp on the outer side of the clamping plate, then the clamp is started to clamp the clamping plate to enable the filter plate to move towards the pressing plate, and then the linear vibration motor is started to drive the filter plate to vibrate to shake off materials in the filter plate. Therefore, the discharging device assists in discharging.

The invention discloses an energy-saving kitchen solid residue treatment system and process, the energy-saving kitchen solid residue treatment system comprises a hydrothermal reactor, a flash evaporation reactor, a material buffer tank, a filter press, a demulsifier, an oil-water separator, an MVR evaporator, a drying machine, a mixing granulator and a heat pump recovery system, the flash evaporation reactor is communicated with the hydrothermal reactor, the material buffer tank is communicated with the flash evaporation reactor, and the material buffer tank is communicated with the filter press. The filter press is communicated with the material buffer tank, the demulsifier is communicated with the material buffer tank, the oil-water separator is communicated with the demulsifier, the MVR evaporator is communicated with the oil-water separator and the filter press, the drying machine is communicated with the filter press and the MVR evaporator, and the mixing granulator is communicated with the drying machine and the oil-water separator. The heat pump recovery system is communicated with the hydrothermal reactor, the flash evaporation reactor, the MVR evaporator and the drying machine. The conveying efficiency can be improved, the dewatering efficiency can be improved, the filter cloth is easier to clean, the drying efficiency is improved, the energy consumption required by drying is reduced, and pollution emission and resource waste are reduced.

This invention discloses a crude calcium formate crystallization system, relating to the field of chemical inorganic salt preparation technology. It includes several reaction vessels, a transfer tank, a purification system, a centrifuge, a concentration system, and a high-level tank. The reaction vessels, transfer tank, centrifuge, filter, and high-level tank are interconnected. Each reaction vessel has a first overflow hole at the top of its side wall. Each reaction vessel is connected to a calcium carbonate supply device and a formic acid supply device. The concentration system includes an evaporation device, a hot air distributor, and a hot air furnace. The purification system includes an overflow tank and a filter press. Each overflow tank has a second overflow hole at the top of its side wall. Each first overflow hole is connected to the overflow tank via an overflow pipe, and each overflow pipe is equipped with an overflow valve. The second overflow hole is connected to the filter press via a pipeline, and the filter press is connected to the evaporation device. The overflow tank is connected to the transfer tank, and a movable sealing plate is provided at the bottom outlet of the overflow tank. This invention can solve the problems of difficult impurity separation, resource waste, high energy consumption, and poor crystallization quality in traditional preparation processes.

The utility model relates to the related technical field of filter presses, in particular to an organic pigment filter press with a leakproof sealing function, which comprises a case, a driving part and a filter box are respectively mounted at the rear end and the front end of an inner cavity of the case, a feeding pump is mounted at the rear end of the filter box and is in transmission connection with the driving part, and a feeding pipe is connected to the top end of the feeding pump. A discharging pipe is installed at the front end of the filter box, inner inserting grooves are formed in the two sides of the filter box, outer inserting grooves corresponding to the inner inserting grooves are formed in the two sides of the machine box, one end of a movable plate is jointly inserted into the outer inserting grooves and the inner inserting grooves, containing grooves are formed in the two ends of the movable plate, filter plates are arranged in the containing grooves, and through grooves are formed in the two sides of the containing grooves. The inner periphery of the outer slot and the inner periphery of the inner slot are both movably and hermetically connected with the outer periphery of the movable plate, and the inner cavity of the filter box can be doubly sealed through a sealing structure at the joint of the inner slot, the outer slot and the movable plate, so that external air is not easy to enter the filter box, and the filter pressing effect of the filter box on organic pigments is ensured.

The utility model discloses an automatic water washing type filter press belongs to filter press technical field, including frame, a plurality of filter plates are placed in the frame sliding, one side of frame is installed hydraulic cylinder, the output fixedly connected with the pressing plate of hydraulic cylinder location in the frame, be provided with the washing spare of washing filter plate on the frame, the washing spare includes two groups, and symmetrically fixed on the beam of frame, the outside of two top beam all slidingly connected has the sliding frame, the outside of two sliding frames all fixedly connected with support rod, fixedly connected with the mounting panel between two support rods, the fixed mounting of mounting panel has the cylinder, the utility model discloses, through the mounting bracket of cylinder descending can drive the brush plate of a group in the mounting bracket cooperation water guide house on the shower head, to the filter plate both sides of separation flushes the brush washing, to improve the cleaning effect of filter plate, thereby improves the filter effect of filter plate subsequently.

A filter plate assembly which is resistant to both wear and deformation caused by creeping, while facilitating maintenance thereof. A filtrate vat is provided that is formed on, and integral with the filter plate, in addition to a separate, replaceable vat liner. In this way, a rigid structure of the filtrate vat capable of resisting deformation may be achieved, while the vat liner separates the filtrate from the filtrate vat and the associated filter plate, providing wear resistance and facilitating maintenance. The present disclosure further concerns the filter plate and the filtrate vat.

The invention relates to the technical field of organic matter purification, in particular to an NMP (N-Methyl Pyrrolidone) extraction method for reaction kettle waste liquid, which comprises the following specific steps: introducing the reaction kettle waste liquid into filter pressing equipment for filter pressing to obtain kettle residual pressure filtrate; adding the kettle residual pressure filtrate and an extracting agent into a stirring tank, uniformly stirring, and then introducing into a liquid separation tank for liquid separation to obtain an extracting solution; carrying out primary rectification on the extract liquor, distilling off an extracting agent and water from the top, layering the extracting agent and water in a phase separation tank, partially refluxing the extracting agent to a primary rectifying tower, carrying out primary distillation on the extract liquor at the kettle bottom temperature of 140-150 DEG C and the tower top temperature of 110-115 DEG C, and recycling until the extraction rate is greater than or equal to 85%; and carrying out second distillation at the kettle bottom temperature of 115-120 DEG C and the tower top temperature of 110-115 DEG C to obtain the NMP with the purity of more than or equal to 99%. According to the method, the kettle residue pressure filtrate is subjected to extraction, primary rectification and secondary rectification, so that N-methyl pyrrolidone in kettle residues can be efficiently purified, the production cost is remarkably improved, and environmental pollution caused by improper disposal is avoided.