234results about How to "Improve dehydration efficiency" patented technology

The invention discloses method of producing liquid organic fertilizer by organic belonging to solid wastes disposal field, including: co-treating the residual sludge with 98 percent moisture content by ultrasound and sodium hydroxide to make the organic matters dissolve out; getting concentrated sludge and supernatant fluid after centrifugation; dehydrating the concentrated sludge after neutralization in a routine method; sand leaching and ultrafiltration treating the supernatant fluid twice after centrifugation to get a concentrated liquid containing macromolecule organic matter such as humic acid and the filtrate containing low molecular organic matter; the filtrate entering into the sewage treating plant for a primary treatment. Disposed dehydrated sludge cake has 70-80 percent moisture content and a reduction of the content of organic matter of 30-50%. The concentrated liquid by ultrafiltration is mainly composed of macromolecule organic matter and with a low content of heavy metal, and can be an organic liquid fertilizer, and complies the rule of using green food fertilizer. The invention is suitable for the sludge with a high organic matter content such as residual sludge and digested sludge.

The invention discloses a production method for ready-to-eat instant nutritive edible fungus soup, which belongs to the technical field of deep processing of agricultural products. The production method mainly comprises the steps of selecting, cleaning, precise cutting, mixed boiling, spreading, pre-freezing and microwave vacuum freeze drying on screened raw materials such as edible fungi, thus obtaining the product which is subjected to nitrogen-filled packaging after being taken out of storage. The raw materials of the edible fungus soup is dewatered by a microwave vacuum freeze drying technology according to a modern food nutrition principle, so that the original color, aroma, taste and nutrients of the product are kept to the hilt, and compared with those of a conventional process, the drying efficiency is remarkably improved, the production cycle is shortened, the production cost is effectively reduced, and the special sterilizing effect of microwaves further guarantees the product quality at the same time. The edible fungus soup produced by the method is flat in shape, bright in color and luster, rich in nutrition, good in water regaining effect and long in storage time, and a feasible new way is provided for deep processing and utilization of the edible fungi.

The invention relates to an environment-friendly-type polluted oil processing agent, which is prepared by a surfactant, a flocculating agent and a solvent through uniformly mixing in a mechanical blending mode, the surfactant is a cationic surfactant and/or an anionic surfactant and/or a non-ionic surface active agent and/or an ampholytic surfactant, the flocculating agent is one of polyferric sulfate, polymeric aluminum ferric sulfate, polymeric aluminium and aluminum sulfate, and the solvent is a mixture of one or more of methyl alcohol, ethyl alcohol, ethylene glycol, propylene glycol, propanetriol or ethylene glycol butyl ether. According to the invention, a plurality of surfactants are employed for compounding, so that electrostatic neutralization effect can be generated on the surface of oil droplets, the stability of an emulsion is worse, so that the purposes of demulsification and oil-water separation can be reached, the flocculating agent has the effect for removing small impurity and mud, as well as demulsificating, so that oil removal efficiency can be increased. According to the invention, dewatering efficiency of the polluted oil processing agent is high, the crude oil can be effectively separated from the polluted oil, the pollution of the polluted oil to the environment can be reduced, and the administration cost is saved.

The invention relates to a blast furnace slag processing device. The processing device comprises a water-quenching cooling device, a slag-water separating device and a slag flush water circulating device, wherein the input end of the slag-water separating device is connected with the output end of the water-quenching cooling device, and the output end of the slag-water separating device is connected with the input end of the slag flush water circulating device; and the output end of the slag flush water circulating device is connected with the input end of the water-quenching cooling device. The blast furnace slag processing device is provided with a condensing and recycling device, reduces the ground occupation area, the investment and the production running cost and has high quality of water and slag.

The invention discloses a plate-type sludge dewatering machine and a dewatering method therefore. The plate-type sludge dewatering machine adopts elastomers positioned among pressing filter plates, adjacent anti-thrust filter plates, air-inlet filter plates, feeding filter plates and thrust filter plates to form at least three hermetic pressing filter chambers variable in volume, utilizes the compression deformation and resilience of the elastomers to deep squeeze and dewater a filter cake, and adopts sealing plugs which are arranged in front of air-inlet holes of the air-inlet filter plates and the thrust filter plates and are on positions opposite to feeding holes on the feeding filter plates and the anti-thrust filter plates, wherein the feeding filter plates are adjacent and involutory to the air-inlet filter plates. After low-pressure filter dewatering is over and feeding is stopped, the sealing plugs block and seal the feeding holes so as to prevent sludge from flowing back and entering pipelines during pressing filtration. The dewatering method adopts the variable hermetic pressing filter chambers formed by the elastomers to perform pressing filtration and dewatering, and adds the operation of adopting the sealing plugs to block the feeding holes before high-pressure squeezing-dewatering operation. The invention has the advantages of high dewatering efficiency, strong adaptability, low energy consumption, low use cost and the like.

The invention belongs to the field of the manufacturing of organic fertilizers and discloses a method for producing an amino acid microbial organic fertilizer by using cassava residue and starch waste liquor. The method comprises the following steps of: dehydrating the cassava residue and the starch waste liquor until the final water content is 60 to 65 weight percent; adding 8 to 12 weight percent of humic acid, 3 to 7 weight percent of oil cake, 3 to 7 weight percent of rice bran and 0.3 to 0.5 weight percent of straw fermentation decomposing inoculant, and performing aerobic fermentation, wherein the fermentation temperature is 40 to 65 DEG C, and the fermentation cycle is 15 to 20 days; and uniformly mixing a functional strain which accounts for 3 to 5 percent of the total weight and is one or more of Bacillus mucilaginosus, bacillus subtilis, Bacillus licheniformis, Bacillus megaterium and Streptomyces jingyangensis, starch-containing waste liquor which accounts for 2 percent of the total weight and fermented residue, aerating the air and performing late curing for 5 to 7 days, and adding 1 to 3 percent of amino acid to obtain a finished product. Raw materials do not contain harmful bacteria and pathogens, harmful gas and odor are not generated in the fermentation, and the fertilizer can increase effect and stimulate plants to grow quickly.

The invention relates to a corn ear fast air drying machine and method. The air drying machine comprises a drum body; end covers are arranged at the top and bottom of the drum body; a heating bin, a wind homogenizing bin, an air drying bin and an exhaust channel are sequentially arranged in the cavity in the drum from bottom to top; electric heating pipes are arranged at the bottom of the heating bin; a blast hole is formed in the drum body; a wind homogenizing plate is arranged between the heating bin and the wind homogenizing bin; a temperature sensor is arranged in the wind homogenizing bin; a turntable is placed at the inner wall of the air drying bin and is provided with through holes; the drum body is provided with a loading side door convenient to open; a flexible clamping plate is arranged at the inner wall of an air duct cylinder; a temperature sensor and a humidity sensor are arranged in the exhaust channel; a liquid crystal display panel is arranged at the outer part of the drum body. The invention also discloses an air drying method, air outlets for entering the air drying bin are arrayed in sequence, large-flow air flows are formed, the air flows can be used for air drying at inner and outer sides of corn ears, air drying can be fast formed and the air drying speed is improved by more than four times compared with the natural air drying speed.

The invention provides a washing machine control method and a washing machine. The washing machine is provided with a high-effective dehydrating program capable of being selected. The high-effective dehydrating program comprises steps of heating washing water via a first heating device at least at the last rinsing time before the washing machine executes, and/or controlling a second heating device to heat air during the dehydrating program of the washing machine, and introducing the heated air to a washing machine cylinder. The washing machine control method mainly utilizes a thermodynamic principle and heats water to rinse at the last time of rinsing; and/or during the dehydration, hot air can be absorbed, so dehydrating efficiency and effect can be improved.

The invention relates to a machine for producing a compacted or non-compacted sack paper web (12), said machine having a head box (1), a screen section (2), a press section (3), a dry section (4A and 4B) and a winding unit (7) and the press section (3) consisting of a single press nip that is designed as a shoe press nip, said nip being formed by a counter-roll and a shoe press roll (9).

The invention discloses a low energy consumption drying treatment technology of residual activated sludge. The treatment technology comprises the following steps: sending the residual activated sludge to a high speed shearing homogenizing tank, adding a treatment agent to the homogenizing tank, shearing and homogenizing the residual activated sludge and the treatment agent at 0-20 DEG C for 0.5-1 h, sending the obtained mixture to a sludge dehydrating machine, dehydrating the mixture to obtain a dehydrated sludge cake and sewage, sending the sewage to a sewage plant, further treating the sewage, sending the dehydrated sludge to a molding machine, extruding the dehydrated sludge to form strips, allowing the strips to enter a solar multilayer mesh belt type low temperature drying box through a conveyor belt, and drying the strips to obtain dried sludge with the water content being less than 15%. The technology decreases the water content of the residual sludge to 15% or less from 97% or above, and greatly reduces the volume of the sludge, and the dried sludge can be used as a further recycling raw material, or can be burnt.

The invention discloses an efficient sludge drying treatment device. The efficient sludge drying treatment device comprises a casing, wherein support legs are bilaterally symmetrically arranged at the bottom of the casing; a screen is arranged in the casing and is inclined; a vertical rod is hinged with the bottom end of the left side of the screen; the bottom end of the vertical rod is fixed at the bottom in the casing; a feeding port is formed in the position, above a guide plate, of the top end of the right side of the casing; a cushion block is fixed at the bottom of the right end of the screen; a rotary cam is arranged below the cushion block. The efficient sludge drying treatment device is novel in structure; with ingenious arrangement of the screen and a screen vibration drive mechanism, dehydration efficiency is greatly improved, meanwhile, scrapers are arranged above the screen and perform reciprocating motion, and sludge on the screen is turned over vertically, so that the dehydration and drying efficiency is further improved; a pair of extrusion rolls is further arranged and used for thoroughly dehydrating and drying the sludge; a discharging mechanism is arranged to facilitate discharging.

The invention discloses a method for making leaf vegetable pickled vegetable by a dry ice quick-frozen forward/back high pressure broth repeated penetration process. The method is characterized in that a process of separation and air drying of stalk and leaves and a dry ice quick-frozen process are employed for pretreating the leaf vegetable raw material, the leaf vegetable raw material is stored in a freezer at the temperature of -18 DEG C, after a broth is prepared, the forward/back high pressure repeated penetration process is employed for rapidly making the Szechwan leaf vegetable pickled vegetable having a traditional fermentation local flavor. According to the process provided in the invention, the leaf vegetable pickled vegetable raw material can reach the purpose of long-term storage without high salinity pickling, salt amount is reduced by 30%-35%, the content of nitrite is reduced by 90%-95%, no high salinity waste water is discharged, the production efficiency is increased by more than 300%, the serialization, automation, standardization and large scale production of Szechwan pickled vegetable can be realized, and the method provided in the invention has a landmark innovation revolution to a traditional production mode to the Szechwan pickled vegetable.

The invention discloses a conveniently-used rapid dehydration device for sludge treatment. The conveniently-used rapid dehydration device for sludge treatment comprises a box body, one side of the topof the box body is fixedly connected with a top box, one side of the bottom of the inner wall of the top box is fixedly connected with a first motor, one end of the output shaft of the first motor isfixedly connected with a movable rod, one end of the movable rod is rotatably connected with one side of the inner wall of the top box, one side of the top of the inner wall of the top box is rotatably connected with a connecting rod, and the bottom end of the connecting rod sequentially penetrates through the top box and the box body from top to bottom and extends into the box body. The invention relates to the technical field of sludge treatment. The conveniently-used rapid dehydration device for sludge treatment improves the working efficiency of people and realizes rapid and efficient dehydration treatment of sludge, so the treatment of the sludge by people is greatly facilitated; and the top end of every supporting column is fixedly connected with a drying cylinder, so the sludge isdried after being dehydrated, thereby the high efficiency and the fastness of sludge treatment are improved.

The invention relates to a thickening and dewatering method for tailings. The method is suitable for thickening and dewatering fine-granule tailings adopting dry stockpiling or a comprehensive utilization plan. According to the method, tailings fed into a stirring barrel are subjected to secondary thickening by adopting a hydrocyclone so as to increase the concentration of tailings fed into a ceramic filter, overflow of the hydrocyclone and filtrate of the ceramic filter are returned to a thickening pond and mixed with fine-granule tailings discharged from an ore dressing process so as to reduce the concentration of the tailings and to increase the deposition speed of the tailings, thus finally achieving the objectives of increasing the efficiency of the ceramic filters and reducing the cost of dewatering.

The invention discloses a method and a device for cyclically treating breeding wastewater and/or improving soil by utilizing livestock and poultry manure. The method comprises the following steps: adding a conditioner into livestock and poultry manure for mixing and conditioning; then pre-drying and dehydrating at low temperature to reduce the moisture content to be less than 10% to obtain dried livestock and poultry manure, indirectly heating the livestock and poultry manure in a pyrolysis and carbonization device, indirectly cooling the obtained charcoal powder, and adding the obtained cooled charcoal into breeding wastewater; and forming charcoal particles; the invention can be directly used for soil improvement; part of COD, ammonia nitrogen, phosphorus and other effective elements andantibiotics and other micropollutants can be pre-removed, and the biochemical treatment load of the aquaculture wastewater is reduced; or the invention is used for deep adsorption and purification ofaquaculture wastewater before tail water is discharged. According to the method and device, pollution caused by simple composting of livestock and poultry manure is avoided, comprehensive treatment of breeding waste is fully achieved, and good social benefits, economic benefits and environmental benefits are achieved.

The invention relates to a viscous paste extruding and dehydrating device, the applied range of which includes but not limited to urban sludge dehydration and oily sludge solid-liquid separation and drying of an oil field. The device main body manly comprises a dehydrating piston, a filter element scraper device, an end face seal, a dehydrating container and a hydraulic system, wherein the dehydrating piston carries out reciprocal rectilinear motion in a cavity of the dehydrating container so as to extrude and push and discharge materials; the filter element scraper device carries out circumferential rotary motion in the cavity of the dehydrating container so as to clean and auxiliary-dehydrate a filter screen; the end face seal carries out reciprocal rectilinear motion in the cavity of the dehydrating container so as to seal and discharge materials; the dehydrating container is used for separating mud and water by virtue of the built-in filter screen; the hydraulic system provides required power and motion control for the whole viscous paste extruding and dehydrating device. The viscous paste extruding and dehydrating device provided by the invention has the characteristics of little heat consumption, high dehydrating effect, strong material adaptability, high degree of automation control and the like.

The invention discloses a spiral-flow type electric dehydrator for crude oil. The spiral-flow type electric dehydrator is characterized by comprising an air collection chamber, an oil collection chamber, an oil inlet pipe, a cylindrical section, plate electrodes, an overflow pipe, a conical section, a dehydrated water discharging pipe, an exhaust pipe, a dehydrated oil discharging pipe, wherein the plate electrodes are arranged in a spiral mode along the periphery of the overflow pipe, and every two adjacent plate electrodes are installed in a staggered mode. According to the spiral-flow type electric dehydrator for crude oil, the hydraulic cyclone technique is adopted, crude oil dehydrating efficiency is improved, the size of the dehydrator is reduced, and crude oil dehydrating time is shortened.

The invention discloses a demulsification method of an oil-in-water type crude oil emulsion. The method employs oxidized graphene as de-emulsifier to carry out dehydration treatment to the oil-in-water type crude oil emulsion at the room temperature. The de-oiling rate of the oil-in-water emulsion is more than 96%. The demulsification method of the invention can be applied to the dehydration treatment of oil-water emulsion with high water content in the petroleum industry.

The invention belongs to the field of feed processing equipment, and in particular, provides novel crushing and dehydrating feed processing equipment. The equipment comprises a frame, a feed port, a discharge port, a crushing mechanism and a dehydrating mechanism; the crushing mechanism includes two rotating shafts relatively rotating from top to bottom and from outside to inside, and movable cutter sets arranged at intervals in the axial directions of the rotating shafts; the dehydrating mechanism includes a spiral shaft and an annular filter screen arranged at the outer periphery of the spiral shaft; and the dehydrating structure is positioned below the crushing mechanism. The equipment adopts two rods to oppositely crush and cut, so that such problems as slip of such crop straws as bananas and difficult cutting-off are solved, and the cutting and crushing efficiency is improved; and the equipment adopts spiral dehydration, so that the dehydrating efficiency is higher. The whole equipment is simple and compact in structure and low in cost, can improve the feed processing efficiency and processing quality, and is specifically suitable for such medium and small silage processing enterprises as cooperatives.

The invention discloses a sludge dewatering device which comprises a cavity body, a movable plunger and a movable plunger driver, wherein the movable plunger is capable of sliding in the cavity body to and fro; a group of dewatering holes are arranged on the movable plunger; a sludge pushing component which is used for preventing the dewatering holes from being blocked is arranged at the rear end of the movable plunger and the rear end is far away from the sludge; the sludge component comprises a group of ejector pins, ejector pin fixing plates and ejector pin drivers; each ejector pin is located in a corresponding dewatering hole; and the ejector pin fixing plates are used for fixing the ejector pins and driving the ejector pins to reciprocate in the dewatering holes under the driving of the ejector pin drivers. The efficient sludge dewatering device disclosed by the invention combines the advantages of plate frame type and belt type filter presses, has the advantages of rapid sludge dewatering efficiency and high dewatering degree, and is capable of finishing the circular dewatering of sludge within 2 minutes.

The invention provides a manganese salt sludge conditioner and a sludge dewatering method. The manganese salt sludge conditioner comprises compounds of bivalent, trivalent, tetravalent and heptavalent manganese; the manganese salts can cause sludge floc flocculation or extracellular organic matter damage; partial bound water is released; in addition, a sludge framework and a dewatering passage can be built. The method for conditioning and dewatering the sludge by using the sludge conditioner comprises the following steps that (1) sludge pretreatment is performed; (2) manganese slat, including single Mn(II) salts or Mn(VII) salts and KMnO4 and NaHSO3(Na2SO3) are added; oxidation-reduction reaction is performed to produce Mn(III) and reaction products of Mn(II), Mn(IV) and Mn(VII) in situ; (3) sludge dewatering is performed; suction filtration or horizontal electric field is used for water removal. The manganese salt sludge conditioner and the sludge dewatering method provided by the invention have the advantages that the dewatering time is short; the operation is simple; pathogenic microorganisms in the sludge are killed in an auxiliary way; the water content of the sludge can be effectively reduced; the safe and sanitation performance of the sludge can be improved.

The invention relates to a method for landfilling and processing municipal sludge by using a geotechnical filter bag, which comprises the following steps: first step, establishing a sludge dehydration landfill with an anti-seepage barrier layer and a sewage collection emission system; second step, placing the geotechnical filter bag with water permeability used for fixing the sludge on the sludge dehydration landfill; third step, filling sludge in the geotechnical filter bag, and dehydrating the filled sludge in the geotechnical filter bag; fourth step, landfilling the sludge when the water content of the filled sludge in the geotechnical filter bag reach the design standard. The method for landfilling and processing municipal sludge by using a geotechnical filter bag has the advantages of good effect for fixing sludge, high dehydration efficiency and easy operation. The stacked geotechnical filter bags reduce the required large land occupation for sludge natural anhydration treatment substantially. Compared with mechanical dehydration, the addition of a polymeric flocculant for dehydrating sludge reduces the energy consumption substantially. The components are easy for transporting, and the enforcement cost is low.

The invention discloses a solid-liquid separation mechanism capable of adjusting the effluent flow rate and the sludge concentration and a using method thereof, and belongs to the field of sludge treatment equipment. The solid-liquid separation mechanism comprises a mixing and flocculating box, the upper portion of the mixing and flocculating box is provided with a discharge port, a fixed support plate and a driving shaft are arranged in the mixing and flocculating box, the driving shaft is sleeved with a stirring shaft frame which is provided with stirring shafts and a pushing rod, the stirring shaft is provided with stirring blades and scraper plates, a water filtering assembly is arranged between the stirring shaft frame and the fixed support plate and comprises fixed rings, gaskets and floating rings, the lower portion of the water filtering assembly is connected with a drainage pipe which is connected with a three-way pipe, the two ends of a straight way of the three-way pipe are each connected with a butterfly valve, and the upper end of the straight way is in threaded connection with a flow rate adjusting pipe and is connected into an external drainage tank; a cleaning pipe is arranged in the mixing and flocculating box and provided with a plurality of water spray nozzles. According to the solid-liquid separation mechanism, the sludge concentration can be increased, and the effluent flow rate and the concentrated sludge concentration can be freely adjusted.

The invention relates to a flocculator mixing condenser, in particular to an intelligent and high-efficient dynamic flocculator mixing condenser, a technical problem to be solved is to provide an intelligent and high-efficient dynamic flocculator mixing condenser capable of mixing uniformly and adjusting the addition amount of the flocculator in real time, the technical scheme is as follows: a mixing container is mounted on a rack, stirring blades are disposed in the mixing container, the stirring blades are installed on a stirring shaft, the stirring shaft is installed at the rack through the bearing seat, an inverter motor is connected to the shaft end, the upper part of the mixing container is provided with a feed port, the lower part of the mixing container is provided with discharge port, a flocculant storage tank is communicated with the feed port sequentially through the solenoid valve and metering pump, flow concentration sensors are disposed on the feed port and the discharge port, a speed sensor is arranged in the mixing container; said inverter motor, the flow concentration sensor and the speed sensor are connected to and controlled by industrial control computers. The flocculator mixing condenser is simple, convenient and widely used in the flocculation mixing agent.

This invention is a dewatering burning treatment method of household garbage. Mechanical dewatering pretreatment method is adopted to replace the heat drying pretreatment method, household garage is broken up at first then efficient deep dewatering process is carried out by high speed centrifuge after removing water by filtering, the garbage dewatered is sent into the furnace to burning, the amount of the calorific power generated is increased by burning garbage through controlling the burning temperature and residence time of flue gas, the amount of generating dioxin is reduced too. The fluw gas generated by burning will be discharged after spray damp dry acid stripping and dsting. This invention can raise the burning temperature of garbage, and reduce the cost for flue gas treatment and environment pollution.

The invention relates to a belt slotting device and a belt slotting method, which can improve the manufacturing quality of a belt provided with a slot. The slotting device comprises a slotting cutter which is made of electrically conductive metals, wherein the cutter is connected to a heating transformer, and the heated cutter performs heat slotting operation on the belt; the heating transformer is arranged on a tool bar, and the tool bar is rotatable and connected with a planker which is connected with a transmission screw rod through a transmission nut; the transmission screw rod is arranged on a main cross beam, connected with a motor through a belt pulley and a triangle belt, and driven to rotate, so that the cutter is driven to move transversely along the axial direction of the transmission screw rod; both ends of the main cross beam are arranged on a pair of upright posts through adjusting bolts; lower parts of the upright posts are provided with pulleys; and the pulleys can move vertically on a vertical movable track and drive the cutter to perform vertical movement, so that the continuous slotting is performed backwards. The device and the method for manufacturing the belt provided with the slot by performing continuous slotting on a flat belt are time and labor saving, and not only reduce the manufacturing cost but also improve the manufacturing quality of the belt.

This invention relates to an expression dehydration system fit for waster paper slag, which comprises compressor, pusher and sewage collecting well, characterized in that the compressor comprises frame, hydraulic oil cylinder 1 setting vertically in the frame, a stripper plate connecting to the bottom of the cylinder 1 and excavation masonry under the ground; in the steel die wall surface it distributes ports for passing water evenly, and the in the lateral of the stripper plate it hinges the steel link which can be active connected with the steel die; the pusher comprises the hydraulic oil cylinder 2, roll vehicle and push plate, which hinges horizontally with the ground seat; the sewage collecting well is set in the bottom adjacent to the excavation, having pump and the inlet, outlet channel of the pump, wherein on end of the inlet channel connected with the discharging slot between the excavation and the steel die.

A method for deeply dehydrating sludge by utilizing cullet belongs to the technical field of sludge treatment. The invention relates to a method for deeply dehydrating sludge by utilizing cullet, comprising adding glass powder to the sludge and extruding the sludge and specially comprising the steps of: a, mixing the surplus sludge with the moisture content of about 80% with the glass powder, and stirring and mixing evenly, thereby obtaining mixed sludge, wherein the mixing quantity of the glass powder is 10%-50% of the total weight of the sludge; and b, feeding the mixed sludge into a filter press for extruding and deep dehydration, thereby obtaining the dehydrated sludge with the moisture content of less than 45%. The method improves the sludge dehydration rate by mixing the glass powder; the obtained dehydrated sludge can be directly used for firing building materials such as ceramsite, bricks and the like; and the recycling problem of the cullet is solved and the purposes of turning waste into wealth and protecting the environment are achieved.

The invention discloses a split concentration belt filter press and a sludge dehydration process. The split concentration belt filter press comprises a feed dehydrating device and an extrusion dehydrating device which are not connected with each other, wherein the feed dehydrating device comprises a dynamic mixer, a material distribution bucket and a slope type gravity dehydration mesh belt; the dynamic mixer comprises a bottom feed inlet, a top overflow pipe and a spiral stirring unit; and the outlet of the overflow pipe is communicated with the material distribution bucket. Since the dynamic mixer is employed for full mixing of sludge and a flocculating agent, the utilization rate of the flocculating agent is increased, consumption is reduced, and a dehydration rate is improved. Mixed sludge undergoes gravity dehydration by the slope type gravity dehydration mesh belt and are then successively subjected to pre-dehydration by an L-type pre-extrusion zone of the extrusion dehydrating device and to in-depth dehydration by a squeezing zone of the extrusion dehydrating device, so the dehydration rate of a sludge product is further improved. The split concentration belt filter press provided by the invention has the advantages of the high utilization rate of the flocculating agent, the high dehydration rate, greater sludge treating capability, etc.

The invention relates to the field of solid-liquid separation filters, and discloses a composite filter drum filter which comprises a composite filter drum (1), composite filtering tubes (2), a first sealing plate (3) and a second sealing plate (4), wherein two ends of the composite filter drum are opened; filtering holes (13) are formed in the wall of the filter drum; two ends of the composite filter drum are opened; filtering holes (13) are formed in the wall of the filter drum; the composite filtering tubes are arranged inside the composite filter drum; the first sealing plate and the second sealing plate are respectively arranged at the openings at two ends of the composite filter drum in a sealing cover manner; two ends of each composite filtering tube are arranged at the first sealing plate and the second sealing plate in a penetration manner. When the composite filter drum filter is used, physical properties and geometrical sizes of solid granules in treated substances are not strictly required, internal filtration and external filtration can be synchronously carried out, and solid-liquid separation indexes and efficiency are far superior to those of conventional filters.