51results about How to "Reduce filter time" patented technology

The utility model relates to the technical field of water treatment devices, in particular to a pretreatment device for detecting the concentration of suspended solids in a water body, which comprises a water sample layering device, the water sample layering device comprises a filter cup, a connecting pipe communicated with the filter cup, an extension piece communicated with the connecting pipe and a connecting branch pipe communicated with the connecting pipe, one end, far away from the connecting pipe, of the connecting branch pipe is arranged in the filter cup; a liquid leakage switch is arranged on the connecting pipe and is arranged between the filter cup and the connecting branch pipe; the filtering funnel is connected with the extension piece in a sealing manner and is used for filtering substances from the water sample layering device; the suction flask is in sealed connection with the filtering funnel and is used for containing filtrate filtered by the filtering funnel; and the suction pump is connected with the suction flask. The pretreatment device disclosed by the utility model can shorten the filtering time, improve the filtering efficiency, reduce the frequency of replacing the filter paper, save consumables and improve the accuracy of a detection result at the same time.

The utility model relates to an electrolyte raw material solvent filtering device. According to the technical scheme, an electrolyte raw material feeding end is connected to the lower ends of molecular sieve columns through feeding pipelines, the upper end of a first molecular sieve column is connected to the top of a prepared material filter through a main material conveying pipeline, and the upper end of a second molecular sieve column is connected to the main material conveying pipeline through a pipeline; the lower end of the stock filter is connected to the upper part of a stock storage tank through a pipeline; the lower end of the stock storage tank is discharged through a stock output pipeline and a stock output pump; and the rear section of the prepared material output pipeline is connected with a recycling pipeline through a recycling pipeline control valve, and the other end of the recycling pipeline is connected to a feeding pipeline at the electrolyte raw material feeding end. The device has the beneficial effects that trace impurities and moisture possibly contained are adsorbed and removed through the molecular sieve, then impurities are removed again through the material preparation filter, in addition, steam or low-pressure hot water is introduced for heat tracing for heating, the filtering time of a raw material solvent is shortened, and the electrolyte yield is improved.

The present invention discloses a filtering device for water sample detection, including a workbench, a rotating seat driven by a rotating power element is arranged on the workbench, a plurality of fixed seats are arranged in an annular manner on the rotating seat, and a collecting and filtering mechanism is closely matched on the fixed seat; a vacuum pump is also arranged on the rotating seat, and a connecting mechanism is arranged between the vacuum pump and the collecting and filtering mechanism; the present invention also includes a support frame arranged on the workbench, a buffer cup is arranged on the support frame, the buffer cup is arranged above the collecting and filtering mechanism and is connected to each other, the buffer cup is in a sealed connection state when it cooperates with the collecting and filtering mechanism, and the buffer cup is also connected to a water sample conveying mechanism. The use of the filtering device for water sample detection greatly improves the filtering speed of the water sample, effectively reduces the filtering time, has a strong continuity of the working rhythm, and has high working efficiency; at the same time, it ensures the effectiveness of water quality detection.

The utility model relates to the technical field of filtering devices, in particular to a hot bath oil filtering device, which adopts the technical scheme that the hot bath oil filtering device comprises a base, a filtering station is arranged above the base, the filtering station comprises a support frame fixedly mounted on the base, and a filtering assembly is arranged under the support frame. An oil inlet pipe used for supplying oil to the filtering assembly is arranged on the supporting frame, a pressurizing device is arranged between the filtering assembly and the supporting frame and used for pressurizing oil so as to increase the permeation speed of the oil in the filtering assembly, and an oil outlet valve is arranged at the bottom of the filtering assembly. According to the utility model, the oil filtering speed is improved and the filtering time is shortened by arranging a pressure filtering mode, and a plurality of filtering stations are arranged, so that the continuous filtering operation can be realized and the filtering efficiency is improved; the filter plates are stacked in multiple layers, the filter elements are arranged in the filter plates, and the filter screens are arranged between every two adjacent layers of filter plates, so that an excellent filtering effect is ensured.

The invention discloses a vitamin K3 waste liquid recycling device with a multi-stage filtering function, and relates to the technical field of waste liquid recycling, the waste liquid recycling device comprises a main body mechanism, a multi-stage filtering mechanism, a path adjusting mechanism and a separating mechanism, the main body mechanism is connected with the multi-stage filtering mechanism, and the main body mechanism is connected with the separating mechanism; the multi-stage filtering mechanism is connected with the path adjusting mechanism, the multi-stage filtering mechanism is connected with the separating mechanism, the path adjusting mechanism is connected with the separating mechanism, the main body mechanism comprises a mounting base, a waste liquid storage tank and a waste liquid output pipe, the waste liquid storage tank is arranged on the mounting base, and one end of the waste liquid output pipe is communicated with the bottom of the waste liquid storage tank; the waste liquid output pipe is connected with a self-priming pump, the mounting base is connected with the multi-stage filtering mechanism, the waste liquid output pipe is connected with the multi-stage filtering mechanism, and the mounting base is connected with the separating mechanism.

This invention proposes an industrial preparation method for a highly stable, low-impurity ferrous sulfate solution. Targeting 98% high-purity raw materials, it pioneers a fixed mass-to-volume ratio, combined with constant-temperature dissolution at 50-60℃ and sealed protection. Through a four-dimensional linkage of "raw material purity - ratio - temperature - anti-oxidation," the final Fe solution achieves optimal stability. 2+ The concentration is stabilized at 5.2%–6.5%, with a concentration deviation of ≤±0.1%. Simultaneously, a triple logic of "raw material impurity content detection + theoretical calculation + pH closed-loop control" is employed, adapting to the strong neutralizing characteristics of 32% high-concentration liquid alkali, precisely controlling the pH at 4.0–5.0, achieving an impurity removal rate ≥93%, and ensuring that the finished product contains Al <10ppm, Ti <8ppm, and Fe <10ppm. 2+ Retention rate ≥98.5%; filtration efficiency is increased by more than 5 times through a dual-stage high-pressure filtration system (0.7MPa).

The invention provides rhizoma polygonati herbal craft beer and a brewing method thereof, and belongs to the technical field of beer brewing, the brewing method comprises the preparation processes of rhizoma polygonati treatment, barley treatment, saccharification and fermentation, and the saccharification and fermentation are both performed in a sectional mode. According to the rhizoma polygonati herbal craft beer and the brewing method thereof, the production efficiency is improved, the taste of the beer is improved, the clarity of the beer is increased, and the health-care effect can be achieved due to the fact that the rhizoma polygonati herbal craft beer contains saponin components.

The utility model discloses a filtering device for water treatment of a central air conditioner, which comprises a tank body, a non-woven fabric filtering layer is arranged in the tank body, a synthetic fiber filtering layer is arranged at the bottom end of the non-woven fabric filtering layer, an activated carbon composite filtering layer is arranged at the bottom end of the synthetic fiber filtering layer, and a water inlet pipe is arranged at the bottom end of the activated carbon composite filtering layer. A silver ion coating metal screen is arranged at the bottom end of the activated carbon composite filter layer. The non-woven fabric filter layer, the synthetic fiber filter layer, the activated carbon composite filter layer and the silver ion coating metal screen are arranged, and the multi-stage filter layers are arranged, so that impurities, peculiar smell, harmful substances, bacteria and viruses in water can be effectively removed, the water quality is improved, the filter pressure can be dispersed through the design of the multi-stage filter layers, and the service life of the filter is prolonged. The service life of the filter layer is prolonged, the silver ion coating metal screen can kill bacteria and viruses in water, the water quality safety is guaranteed, the silver ion coating metal screen can serve as a fixed support for supporting the filter layer, and meanwhile medium loss of the filter layer is avoided.

The present invention discloses a high-performance insoluble sulfur production system and method. The insoluble sulfur wet production system can be used to produce high-performance insoluble sulfur products through the combination of sulfur polymerization, quenching, crushing, aging, extraction, drying, oil filling and other units. The production system of the present invention is a liquid phase environment, which avoids safety problems such as system blockage and powder explosion caused by solid or powder material transportation. The production process has the characteristics of safety and reliability, simple equipment and operation, and obvious energy saving effect.

The utility model discloses a filtering device for silane coupling agent production. The filtering device comprises a filtering tank, a vibration filtering assembly and a cleaning assembly, a funnel is arranged at the top end of the filtering tank, a discharging pipe is arranged at the top end of the filtering tank, a supporting column is arranged at the top end of the filtering tank, a motor bin is arranged on one side of the filtering tank, the vibration filtering assembly is located on the inner side of the motor bin, and the cleaning assembly is located on the inner side of the filtering tank. Compared with the prior art, the device has the advantages that the top end and the bottom end of the filtering plate can be scraped, the inner wall of the filtering tank can be scraped, flowing and discharging of a silane coupling agent are accelerated, the filtering plate can be vibrated, filtering is accelerated, and the filtering time is shortened.

The utility model relates to the field of water conservancy projects, in particular to a sampling device for lake water quality detection. The utility model provides a sampling device for lake water quality detection, which can quickly collect and sample water at different depths of a lake at the same time, can filter impurities in the water, and improves the sampling quality. A sampling device for lake water quality detection comprises a support frame, a gear rotating shaft, a rotating gear, an operating rod and the like, two gear rotating shafts are rotationally connected to the supporting frame, rotating gears are fixedly connected to the two gear rotating shafts respectively, the two rotating gears are meshed, and operating rods are fixedly connected to the two rotating gears respectively. The two sampling pipes are driven to sink into the water bottom by rotating the hand rocker, so that the two sampling pipes are positioned at different depths in the water, and water samples can be quickly collected at the different depths in the water bottom at the same time.

The invention discloses a thin film mass transfer device and a detection method thereof, and relates to the technical field of thin film mass transfer devices.The thin film mass transfer device comprises a base, a solution pool, a rotary connecting structure, a detection structure, a data processing assembly, a liquid level detection structure and a temperature control unit, the bottom of the base is a horizontal plane, and the base serves as a supporting structure of the mass transfer device; the top of the base is at least fixedly connected with one lifting structure, the lifting structure is provided with a lifting part, the interior of the solution tank is divided into a first solution cavity and a second solution cavity by a filtering film, and the first solution cavity and the second solution cavity can be used as loading structures of a solution to be detected and a solvent respectively. The filtering capacity of the filtering film is improved by abandoning a traditional pressurizing mode, the solute filtering effect of the filtering film can be effectively guaranteed, the film is prevented from being deformed and damaged, meanwhile, reagent consumption is reduced, and the use stability and reliability of the film mass transfer device are greatly improved.

The utility model discloses a fly ash leaching bottle cleaning device which is used for soaking and cleaning a fly ash leaching bottle and comprises an outer box and a soaking inner box used for soaking the fly ash leaching bottle, the soaking inner box is arranged in the outer box in a sliding mode through a sliding assembly, a clamping assembly is arranged in the soaking inner box, and the clamping assembly is used for clamping the fly ash leaching bottle. And the clamping device is used for fixedly clamping the fly ash leaching bottle in the soaking inner box. The fly ash leaching bottle cleaning device has the advantages of being short in soaking time, high in cleaning strength, high in reliability, low in cost, high in working efficiency and the like, and a cleaning agent cannot cause harm to a human body.

The utility model discloses a filter device for manufacturing synthetic fibers, and relates to the technical field of filter devices for synthetic fibers. The device comprises a filter box, wherein a vibration mechanism and a feeding mechanism are arranged on the filter box; two trapezoidal sliding grooves are formed in the inner wall of the filter box, filter screens are slidably connected to the inner walls of the two trapezoidal sliding grooves, a filter residue outlet cover plate is hinged to the outer wall of the filter box, and a fiber discharging cover plate is hinged to the outer wall of the filter box; handles are fixedly connected to the outer wall of the filter residue outlet cover plate and the outer wall of the fiber discharging cover plate, and the vibration mechanism comprises a first vibration assembly and a second vibration assembly. By arranging the vibration mechanism, the problems that impurities are easily accumulated on the surface of the filter plate, blockage is caused, the filtering efficiency and flow are reduced, frequent shutdown cleaning is needed, uniform distribution of fibers cannot be ensured, the local filtering effect is good, and the filtering effect of other areas is poor are solved.

The utility model discloses an ink jet mechanism with a stirring structure, which comprises an ink box and a filter, a stirring blade is arranged in the ink box, a motor is arranged below the stirring blade, the filter is arranged above the ink box, a feeding assembly is arranged above the filter, and the feeding assembly is connected with the motor. And the feeding assembly comprises a shell, a piston and an electric telescopic rod, the interior of the shell is slidably connected with the piston, and the electric telescopic rod is installed above the piston. Compared with an existing ink jet mechanism, the ink jet mechanism with the stirring structure has the advantages that the electric telescopic rod drives the piston to press downwards to increase the pressure in the shell, ink is rapidly filtered through the filter, the stirring blades are driven by the motor to rotate, the ink is continuously stirred, precipitation is prevented, and in order to keep the ink at a proper temperature, the stirring effect is good. The heater heats the heat conduction liquid in the heat conduction pipe, the heat conduction liquid circulates in the side wall of the ink box through the circulating pump, and the ink is heated to the most appropriate temperature under monitoring of the temperature sensor.

The utility model discloses a lithium iron phosphate sand abrasive settling device which comprises a support and a device body, the right side of the top of the device body is fixedly connected with a base, the top of the base is fixedly connected with a motor, the output end of the motor is fixedly connected with an eccentric wheel, and the outer ring of the eccentric wheel is fixedly connected with a rotating shaft. A transmission column is rotationally connected to the exterior of the rotating shaft, a connecting column is rotationally connected to the bottom end of the transmission column and penetrates through the top of the device body, and a pressurizing disc is fixedly connected to the bottom end of the connecting column; a filter screen is arranged between the pressurizing disc and the top of the device; a feeding hole is formed outside the device main body in a penetrating manner, and a discharging hole is formed in the bottom of the device main body. According to the lithium iron phosphate sand abrasive settling device, the filtering time of the lithium iron phosphate sand abrasive settling device can be effectively shortened, and the filtering efficiency is improved. The device is suitable for treating waste lithium iron phosphate sand grinding material liquid and is used for settling the waste lithium iron phosphate sand grinding material.

The invention discloses an online monitoring type working fluid filtering device, and relates to the technical field of working fluid filtering. The online monitoring type working fluid filtering device comprises a mounting plate, a filtering mechanism is arranged at the top of the mounting plate, a water storage tank is fixedly mounted at the top of the mounting plate, the water storage tank is connected with the filtering mechanism through a liquid outlet pipe, and a bottom plate is fixedly mounted at the bottom of the mounting plate through four sets of supporting legs; a motor is fixedly installed at the top of the bottom plate, a rotating shaft is installed at the output end of the motor, a first rotating rod, a second rotating rod and a third rotating rod are rotatably installed at the top of the bottom plate, and the rotating shaft is connected with the first rotating rod, the second rotating rod and the third rotating rod through a transmission mechanism. Impurities adsorbed on the filter material can be released easily, meanwhile, the speed of water flowing through the filter material can be increased by rotating the filter material, the overall filtering time is saved, and the working efficiency is improved.

The invention discloses a method for improving the dehydration performance of flotation clean coal based on a high-molecular polymer, and relates to the technical field of coal slime flotation. The method comprises the following steps: S1, adding a high-molecular polymer; S2, adding a surfactant; and S3, carrying out solid-liquid separation on the flotation clean coal. According to the method, through the synergistic effect of the high-molecular polymer and the surfactant, the dewatering effect of the flotation clean coal is greatly improved, the filtering time is shortened, the production efficiency is improved, the water content of the filter cake is reduced, compared with a traditional dewatering process, the water content of the flotation clean coal filter cake can be remarkably reduced through the method, and therefore the follow-up treatment and transportation cost is reduced; the adopted high-molecular polymer and the surfactant can achieve a good effect at a low dosage, and the adopted surfactant is an environment-friendly surfactant, has biodegradability, has small influence on the environment and has good sustainability.

This invention discloses a method for low-temperature pressing purification and dewaxing of Torreya grandis kernels, comprising at least the following steps: S5.1 Pre-preparation of a composite filter layer: After pre-cooling the filter chamber of a vacuum filtration device, a filter screen and a filter membrane are laid in sequence, and nitrogen is introduced to remove impurities; S5.2 Gradient negative pressure filtration: The initially dewaxed oil is injected into the filter chamber at low temperature, first pre-filtered at -0.05MPa to -0.06MPa for 10 minutes, then deep filtered at -0.08MPa to -0.09MPa for 20 to 30 minutes to retain trace wax crystals; S5.3 Nitrogen purging to remove water: The dewaxed oil is introduced into a low-temperature oil storage tank, and nitrogen is continued to be introduced to remove water and prevent oxidation; S5.4 Finished product fine filtration: The dewaxed oil is slowly heated and then finely filtered through a filter screen to obtain Torreya grandis finished oil. Gradient negative pressure filtration retains trace wax crystals in Torreya grandis oil. This invention employs a gradient negative pressure dewaxing step, which ensures sufficient driving force to accelerate the filtration speed and utilizes the formed filter cake layer as a secondary filtration medium to efficiently retain trace amounts of residual wax crystals. This approach ensures a high dewaxing rate while shortening the filtration time and improving production efficiency.

The present invention relates to the technical field of laminated filters, and in particular to a filter laminate and a filter. The filter laminate provided by the present invention comprises: a laminate body, a plurality of flow guides and a flow channel structure. The flow guides are distributed in an array on the laminate body along a first direction and a second direction, and are arranged along the surface protrusions of the laminate body, and two adjacent flow guides are arranged at intervals; the shortest distance between two adjacent flow guides in the second direction is a first spacing, and the shortest distance between two adjacent flow guides in the second direction of the next group in the first direction is a second spacing, and the first spacing is greater than the second spacing; the flow channel structure comprises a plurality of first flow channels and a plurality of second flow channels arranged in an alternating manner, the first flow channel is extended along the first direction and arranged between two adjacent flow guides in the second direction, and the second flow channel is extended along the second direction and arranged between two adjacent flow guides along the first direction, thereby improving the filtering efficiency of the filter laminate.

The utility model belongs to the technical field of rolling oil filtering, and relates to a rolling oil filtering device which comprises a through hole shaft rotatably mounted on a filter cartridge, an oil inlet pipe communicated with one end of the through hole shaft through a rotary joint, the through hole shaft connected with a first motor through a bevel gear transmission part, and a first filtering system connected with the other end of the through hole shaft. A first filtering system and a second filtering system are sequentially installed in an inner cavity of the filtering cylinder from top to bottom, an oil return pipeline is arranged on the filtering cylinder, the oil inlet end of the oil return pipeline is communicated with the filtering cylinder, and the oil outlet end of the oil return pipeline is located between the first filtering system and the second filtering system. According to the utility model, primary filtration is carried out through the first filtration system, impurities with larger particle sizes are intercepted and then enter the second filtration system to be deeply purified, so that finer impurities are further removed, and the rolling oil is circularly filtered through the oil return pipeline, so that the filtration frequency of the rolling oil is increased, the rolling oil participates in the filtration process again, and the filtration sufficiency is improved; and the filtering quality is further ensured.

The application relates to the technical field of medicine preparation, in particular to a preparation device and method of high-purity landiolol hydrochloride, which comprises a water bath heating tank, a filtering structure communicated with the lower part of the water bath heating tank through a valve assembly, a cooling liquid storage tank communicated with the lower part of the filtering structure, a semiconductor refrigeration device installed on the outside of the cooling liquid storage tank, a first heat exchange unit installed on the outside of the water bath heating tank, and a second heat exchange unit communicated with the first heat exchange unit and installed on the outside of the semiconductor refrigeration device; from adding a crude solution, heating, filtering, cooling crystallization to equipment resetting, a coherent production process is formed; when a batch of purification is finished, the water bath heating tank is communicated with the cooling liquid storage tank, and the filtering assembly is reset, so that the next batch of production can be immediately started without long-time waiting for equipment adjustment, the production cycle is greatly shortened, the demand for continuity in large-scale industrial production is met, and the yield is significantly improved compared with a traditional intermittent production mode.

The utility model discloses a water resource protection wastewater treatment device, including filter box, the top of filter box is connected with the box cover through the bolt fixed, the bottom fixed connection of filter box has the support leg, the inside of filter box is provided with filter mechanism, and filter mechanism includes: frame, set up in the inside of filter box, filter screen. The utility model relates to water resource protection technical field, and this water resource protection wastewater treatment device passes through the cooperation between cam, motor, shell, gyro wheel, stand, spring, concave board, curved column, frame and filter screen, has realized the time of shortening wastewater filtration, has solved the existing treatment device when processing, because the position of filter screen is unchangeable, cannot make filter screen move up and down, leads to the impurity in wastewater to be jammed in the hole in the inside of filter screen, causes wastewater filtration time to be long, thereby has reduced the problem of existing treatment device work effect.

The present invention provides a polytetrafluoroethylene membrane with a gradient pore structure and a preparation method thereof. The cross section of the membrane has a gradient pore structure. The first porous outer surface and the second porous outer surface of the polytetrafluoroethylene (PTFE) membrane have fibers and nodes with different microstructures; the first porous outer surface has an island-like microstructure constructed by a plurality of interconnected smaller nodes, and the second porous outer surface has an H-shaped ladder-like microstructure constructed by a plurality of interconnected larger nodes. The PTFE membrane material with a gradient pore structure prepared by the method has the characteristics of low resistance and high flow rate without reducing the thickness and filtering accuracy, and the improvement of filtering efficiency enhances the capture of pollutants. For a given transmembrane pressure drop, the high permeability or high flow capacity of the membrane reduces the resistance loss, shortens the filtration time, and thus reduces the energy cost.

The utility model relates to the technical field of water storage pool, and disclose a novel water circulation water storage pool, including water pool and filter box, and the lower end four corners of water pool all are installed with stand, and stand is provided with four, and the lower part of water pool front end wall is connected with drainage pipe, the front part of water pool left side wall is connected with first connecting pipe, and first connecting pipe left end communicates with filter box, and the rear part of water pool right side wall is installed with second connecting pipe, and second connecting pipe right end communicates with water pool, and both sides of filter box upper end are all provided with recess, and recess inside all are provided with spring, and spring rear end all are installed with slide plate, in the utility model, start water pump, and clear water enters into filter box through first connecting pipe, and clear water can drive filter plate to vibrate, and two springs carry out elastic movement to intensify filter plate vibration, avoid impurity accumulation on filter plate to improve the efficiency of filtration, and the filtered clear water enters into water pool through second connecting pipe to realize cyclic use and reduce the filtration time of later period.

The utility model relates to the technical field of textile equipment, and discloses size filtering equipment for slashing, which comprises a filtering barrel, a sealing cover is clamped at the top of the filtering barrel, a driving cavity is reserved in the sealing cover, an air inlet net is clamped at the top of the sealing cover, an air pump is fixedly connected with the inner wall of the driving cavity, and the air pump is fixedly connected with the inner wall of the driving cavity. The output end of the air pump is fixedly connected with an air conveying pipe, and the bottom of the air conveying pipe is fixedly connected with a sealing box. The slurry filtering device has the following advantages and effects that the filtering barrel is located in a closed space, the air pump is started to suck external air after the valve is opened, and the air enters the driving cavity from the air inlet net, enters the sealing box along the air conveying pipe and is blown out through the through hole, so that positive pressure is formed in the filtering barrel, and slurry is pressed by the pressure of the air to seep and be filtered; the filtered slurry flows to the bottom of the inner wall of the filtering barrel and is extruded out of the discharging pipe, and the slurry is promoted to penetrate through the filtering screen groove through positive pressure, so that the filtering efficiency is improved.

The utility model provides a medicine residue filter for plaster processing. The medicine residue filter for plaster processing comprises an upper filter tank, a pressurizing mechanism is mounted in the upper filter tank, a lower filter tank is arranged at the bottom of the upper filter tank, a filter plate is mounted in the lower filter tank, a motor is arranged on the pressurizing mechanism, a lead screw is fixedly connected to the driving end of the motor, a two-way threaded groove is formed in the surface of the lead screw, and the two-way threaded groove is fixedly connected to the driving end of the motor. The surface of the lead screw is in threaded connection with a pressure disc, four guide blocks are fixedly connected to the side face of the pressure disc, a plurality of one-way valves are arranged on the pressure disc, through holes are formed in the one-way valves, fixed connecting rods are fixedly connected in the one-way valves, and a pressed spring is arranged between a pressed plate and a fixed recycling block. And the upper filter tank is fixedly connected with a support frame. The medicine residue filter for plaster processing provided by the utility model has the effects of improving the filtering efficiency and preventing the filter from being blocked.

The present application relates to sewage treatment technical field, especially sewage multi-stage processing device for nitration cotton production, including processing bucket and motor fixedly connected to the top end of processing bucket, the output end of motor is connected with rotating shaft, the bottom end of rotating shaft is rotatably arranged in processing bucket, the upper end of processing bucket is connected with liquid inlet pipe, the bottom end of processing bucket is connected with liquid outlet and residue outlet.The present application provides a kind of sewage multi-stage processing device for nitration cotton production, when rotating shaft counterclockwise rotates, will make cleaning scraper bar in outer filter sleeve or inner filter sleeve inner cavity disturbance, can prevent the impurities in liquid deposition, shorten the filtration time, when rotating shaft clockwise rotates, cleaning scraper bar can scrape the impurities on the inner wall of outer filter sleeve or inner filter sleeve, and when each limit knob is pressed in turn to extrusion slope, the air pressure of cavity surrounded by sliding plate and filter screen can be changed instantly, and the impurities adhered in mesh hole are discharged.

The utility model relates to the technical field of metal recovery treatment, and discloses a screening device for metal scrap recovery, which comprises a support component, shaking support rod components are fixedly mounted on two sides of the top of the support component, and a filter box component is fixedly mounted on the top of each shaking support rod component. Shaking brake assemblies are installed on the two sides of the filter box assembly in an associated mode, a cleaning assembly is installed in the filter box assembly in a limiting mode, and the middle of each shaking brake assembly is fixedly installed in the middle of the support assembly. The shaking brake assembly is mounted on the device, so that when the device is used, the filter box assembly can be shaken through the arranged shaking brake assembly, the filtering work efficiency can be improved, and certain filtering time is saved.