CN106946435B - Deep reduction method for sewage sludge with large treatment capacity - Google Patents
Deep reduction method for sewage sludge with large treatment capacity Download PDFInfo
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- CN106946435B CN106946435B CN201710226347.1A CN201710226347A CN106946435B CN 106946435 B CN106946435 B CN 106946435B CN 201710226347 A CN201710226347 A CN 201710226347A CN 106946435 B CN106946435 B CN 106946435B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/28—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating
- B01D25/282—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying
- B01D25/284—Leaching or washing filter cakes in the filter handling the filter cake for purposes other than regenerating for drying by gases or by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/001—Upstream control, i.e. monitoring for predictive control
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/066—Overpressure, high pressure
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a depth reduction method for sewage sludge with large treatment capacity, which is based on a depth reduction device for sewage sludge with large treatment capacity, wherein the depth reduction device for sewage sludge with large treatment capacity comprises a filter press plate frame, a long stroke oil cylinder (1), a short stroke oil cylinder (9), a mechanical amplification mechanism (10) and a high-pressure sludge inlet pump (28), a filter press cavity (37) is formed between the filter press plate frames, the left side and the right side of the filter press plate frame are respectively and fixedly connected with an outer ring (32) and an inner ring (34), the outer ring (32) and the inner ring (34) of two adjacent filter press plate frames are tightly matched, and a sealing element (33) is arranged on the inner ring (34); the output end of the long-stroke oil cylinder (1) is fixedly connected with the main push plate (8), and the mechanical amplification mechanism (10) is arranged between the main push plate (8) and the auxiliary push plate (11). The invention has the advantages of less easily-damaged parts, low energy consumption and lower water content of the dewatered sludge.
Description
Technical Field
The invention relates to the field of sewage sludge treatment, in particular to a method for deeply reducing sewage sludge with large treatment capacity.
Background
The high water content of the sludge is a bottleneck for restricting sludge treatment, the sludge with high water content is large in volume, and a large amount of organic matters, heavy metals and harmful microorganisms contained in the sludge are easy to decay or release into the environment, so that secondary pollution is caused, and the subsequent landfill, incineration, resource utilization and the like of the sludge are adversely affected. Therefore, the deep dehydration and reduction of the sludge are the primary purposes of sludge treatment, the reduction is the basis for realizing other 'three-transformation' of the sludge, and the drier the sludge is, the more beneficial the subsequent treatment and disposal are.
The dewatering equipment commonly used for the early sludge comprises a plate-and-frame filter press, a rotary drum centrifuge and a belt type filter press, the water content of the sludge is generally 75-80% after the sludge is dewatered by the equipment, the sludge is inconvenient to transport and high in cost due to overhigh water content, the sludge cannot be directly treated in a landfill, the drying time is long, a large amount of organic matters and rich nutrients such as nitrogen, phosphorus, potassium and the like in the sludge are easy to decay, and the odor is generated to cause environmental pollution.
At present, most sludge deep dehydration equipment applied to the market is a diaphragm plate-and-frame filter press, but the efficiency is low during dehydration, the squeezing pressure is only 1.6MPa, sewage is injected into the diaphragm plate-and-frame by a high-pressure water pump during squeezing, the diaphragm is expanded to reduce the area of a filter chamber, and the diaphragm plate frame is squeezed by plastic deformation of the plate-and-frame; the compression ratio of the diaphragm plate frame is small, and the relative working period is long. In addition, common elastic pressing plate frames on the market are structurally constructed, the filtering plates are all integral injection molding parts, the filtering plates are easy to damage and deform, the damaged filtering plates need to be integrally replaced, maintenance cost is high, more importantly, due to the structural characteristics and low pressing pressure, municipal sludge can be squeezed and dewatered to about 60% by adopting the membrane plate frame filter press currently, the water content is reduced by about less than that of the existing plate frame filter press, the main reason is that secondary squeezing is carried out on the sludge due to membrane bulging, namely, a sludge filter pressing cavity is a variable cavity, but lime and ferric salt with the absolute dry sludge amount of about 30% need to be added into the equipment, so that the sludge amount is greatly increased, the added lime, ferric chloride and the like can bring adverse effects on subsequent sludge treatment, and the reduction and harmless principles of sludge treatment are violated.
At present there is also a super high pressure elasticity squeezes sludge dewaterer, and this equipment mainly includes high-pressure cylinder, super high pressure filter plate, joins in marriage the board, spring medium, special filter cloth, tailboard, push pedal, girder etc. and constitutes, and this super high pressure squeezes the sheet frame and includes filter frame, filter plate, filter cloth, studio, spring and piston plate, and the spring sets up between filter frame and filter plate, and the piston plate sets up between studio and filter plate for the filter plate passes through the piston plate and produces the compression effect to the studio. The dewatering process of the press plate is mainly divided into two stages, wherein the first stage is to convey materials to a filter chamber by a feed pump, and solid-liquid separation is carried out by means of the pressure of the feed pump while feeding, namely primary filtration dewatering; the second level is elastic squeezing, one end of the device is fixed, the other end of the device applies external pressure through a hydraulic oil cylinder, and the filter chamber space is compressed through an elastic force transmission device (a spring) to squeeze the materials for secondary dehydration. The water content of the sludge can be reduced to about 50% by carrying out ultrahigh pressure squeezing on the sludge, wherein the squeezing pressure is about 5MPa, and the high-pressure oil pump needs to provide pressure of about 25-30 MPa. Similarly, this superhigh pressure elasticity squeezer realizes squeezing the change of cavity volume to mud through setting up the spring and realizes the superhigh pressure extrusion, because the spring often accomplishes processes such as extension-compression, need bear alternating load, the spring takes place fatigue failure easily, the spring is a vulnerable part, and need 10-20 high strength springs between every group sheet frame, 50-100 sheet frames then need nearly 1000-2000 high strength springs, and, still need overcome the initial elastic force effect of spring when squeezing the spring, the mud receives actual pressure of squeezing and is littleer than the pressure that the superhigh pressure oil pump provided when the secondary is squeezed. For example, when the feeding pressure is 1MPa, the spring must provide an elastic force greater than 1MPa, so that the chamber between the filter plate and the filter frame can be kept maximized, and when the feeding compression is finished and the high-pressure pump performs a second high-pressure compression on the sludge, the elastic force of the spring must be overcome, and the pressure is consumed, so that the pressure generated by the high-pressure pump on the sludge is smaller than the actual pressure.
The existing market also has an ultrahigh pressure diaphragm plate and frame filter press, and this equipment is for upgrading on original diaphragm plate and frame filter press, provides nearly 10 MPa's pressure to mud through the water that injects 10MPa in the diaphragm, also is the process of squeezing for the second grade, begins promptly through feed pressure, then injects high-pressure liquid in the diaphragm, carries out the bulging to the diaphragm and further squeezes the dehydration to mud, and municipal administration mud moisture content can drop to about 50% after this equipment dehydration. One major problem with this device is that the diaphragm is subject to such high pressures and large deformations that affect the useful life of the diaphragm.
Through the analysis, it can be seen that the variability of the volume of the sludge pressing chamber is required to realize the deep dehydration of the sludge, and the sludge is pressed at high pressure. Regardless of the variability of the sludge pressing chamber of the membrane plate-and-frame filter press or the ultrahigh pressure elastic press, the current sludge deep dehydration equipment has the following main problems: (1) The sludge squeezing pressure of a common diaphragm plate-and-frame filter press is low, the squeezing pressure of an ultrahigh-pressure diaphragm plate-and-frame filter press is enough, but the service life of a diaphragm is not long; (2) The ultrahigh-pressure elastic presser realizes the change of the volume of a sludge pressing chamber by virtue of a spring, and the spring is easy to damage and can consume a large amount of pressing pressure; (3) The higher the pressure is, the firmer the sludge tightly attached to the filter plate is, a compact sludge layer is easily formed, and the sludge layer is bonded on the filter cloth, so that the water discharge resistance is increased, and the dehydration effect is influenced; (4) Because the sewage sludge has the characteristics of high compressibility and high water content and the sewage sludge contains capillary water, absorbed water and internal water, the sludge is difficult to dewater deeply by completely adopting mechanical pressure, so that the water content of the sludge reaches a lower level; (5) All pressure directly comes from the pressure of high-pressure oil cylinder, and no force amplification mechanism is used, so that the pressure of the oil cylinder and the volume of the oil cylinder are overlarge, and higher requirements on the sealing and the reliability of equipment are provided.
Disclosure of Invention
In view of the above, the invention provides a method for deeply reducing sewage and sludge with large treatment capacity, which has the advantages of less easily damaged parts, low energy consumption, low water content of dewatered sludge and low energy consumption, aiming at the technical problems of more easily damaged parts, high energy consumption, high requirement on oil cylinder pressure and high water content of dewatered sludge in the prior art.
The technical scheme of the invention is that a sewage sludge depth reduction method with large treatment capacity is provided, based on a sewage sludge depth reduction device with large treatment capacity, the sewage sludge depth reduction with large treatment capacity comprises filter press plates, a long stroke oil cylinder, a short stroke oil cylinder, a mechanical amplification mechanism and a high-pressure sludge inlet pump, wherein a filter press cavity is formed between the filter press plates, the left side and the right side of each filter press plate are respectively and fixedly connected with an outer ring and an inner ring, the outer ring and the inner ring of two adjacent filter press plates are tightly matched, and a sealing element is arranged on the inner ring; the output end of the long-stroke oil cylinder is fixedly connected with the main push plate, the mechanical amplification mechanism is arranged between the main push plate and the auxiliary push plate, the short-stroke oil cylinder is arranged on the main push plate, the output end of the short-stroke oil cylinder is connected with the mechanical amplification mechanism, and the auxiliary push plate acts on the filter-pressing cavity;
wherein, the long-stroke oil cylinder (1) pushes each filter pressing plate frame forwards, so that a filter pressing cavity (37) is formed between the filter pressing plate frames; the high-pressure sludge inlet pump (28) pumps sewage sludge into the pressure filtration cavity (37) to realize feed dehydration; the long-stroke oil cylinder (1) continues to be pushed forward so as to realize high-pressure dehydration on sewage sludge; on the basis of the work of the long-stroke oil cylinder (1), the short-stroke oil cylinder (9) further acts on the main push plate through a mechanical amplification mechanism (10) to realize ultrahigh-pressure dehydration.
By adopting the structure, the invention has the following advantages: (1) Through a matched structure among the filter pressing plate frame, the outer ring, the inner ring and the sealing element, a closed cavity with variable volume is formed, the high compressibility characteristic of sludge is met, quick-wear parts such as springs and diaphragms are not adopted, the reliability of equipment is improved, and the service life of the equipment is prolonged; (2) The sludge feeding pump can adopt a high-pressure plunger pump, sludge can be subjected to first feeding pressure dehydration through the high-pressure feeding pressure, then the sludge is further pressurized through a long-stroke oil cylinder, second-stage squeezing dehydration is carried out, finally, the oil cylinder force is amplified through a short-stroke oil cylinder and a mechanical amplification mechanism, the sludge is further pressurized to reach third-stage pressure, high-pressure dehydration is carried out, and through the force amplification mechanism, the system oil pressure of the high-pressure pump can be reduced, and the energy consumption and the sealing requirement of a hydraulic system are reduced; because partial moisture in the sludge can not be removed in a mechanical mode, the high-pressure gas generator and the high-pressure gas generator assembly are adopted in the scheme, and the moisture which is difficult to remove in the sludge in the mechanical mode is taken away in a high-pressure airflow mode under the action of high-pressure gas, so that the double-effect effects of mechanical squeezing and airflow are realized, the moisture in the sludge is further reduced, and the purpose of sludge depth reduction is achieved.
Optionally, the main push plate is fixedly connected with a pull rod, the auxiliary push plate is also connected with a pull rod, the pull rod is also provided with a wedge-shaped groove, the pull rod fixed on the main push plate penetrates through a limiting valve body arranged on the rack and corresponds to a limiting valve core arranged on the limiting valve body one to one, the pull rod fixed on the auxiliary push plate corresponds to the limiting valve core arranged on the main push plate one to one, the limiting valve core is connected with a steering gear, and the steering gear is connected with a motor. One-way locking can be realized through the matching of the limiting valve core and the pull rod.
Optionally, the filter-pressing sheet frame include mainboard, filter plate, strengthen lining and filter cloth, the mainboard both sides be provided with the filter plate respectively, mainboard and filter plate in the middle of set up short spacer pin for keep certain clearance between mainboard and the filter plate, the filter plate outwards is equipped with in proper order and strengthens lining and filter cloth, strengthen the lining and fix on the filter plate, mainboard, spacer pin, filter plate, strengthen lining and filter cloth central point put and all set up into the mud hole, make mud can follow into in the mud hole gets into next set of filter-pressing sheet frame in proper order. The filter plate on can set up a plurality of bumps, play water slot and through-hole, through setting up a large amount of play water slots, smooth and easy discharge of hydroenergy that the filter-pressing was come out, the filter plate outside is equipped with in proper order and strengthens lining and filter cloth, the enhancement lining fix on the filter plate, the filter cloth fix on the mainboard, through multistage squeezing, it is very big to squeeze pressure when second, tertiary are squeezed, and the filter cloth bears the high pressure and is easily damaged down, protects the filter cloth through the effect of strengthening the lining, solves the easy damaged filter cloth that prior art exists, needs difficult problems such as frequent change, the filter plate frame of filter pressing be mainboard, spacer pin, filter plate, enhancement lining, filter cloth from inside to outside respectively, adopt this structure, under the condition of the intensity of guaranteeing the filter plate frame, solve the easy damaged problem of filter cloth, improve the filter cloth life-span, can realize the smooth and easy flow of high-pressure gas and filtrate again.
Optionally, the filter pressing plate frame on also be fixed with spacing valve body and location from the locking lever, spacing valve body in be provided with spacing case, spacing case all be connected with steering gear correspondingly, the steering gear that is connected with spacing case on the filter pressing plate frame meshes with the rack, the rack be connected with the cylinder, the rack fix on the rack guide rail, still be connected with location from the locking lever on the spacing valve body. Each limit valve core is fixedly connected with a steering gear, the steering gear connected with the limit valve core on the filter pressing plate frame is meshed with a rack, namely, one rack controls all steering gears simultaneously, the uniformity of reversing is guaranteed, the rack is connected with the air cylinder, the rack is fixed on a rack guide rail, the filter pressing plate frames are sequentially connected into a whole through elastic zippers arranged on limit valve bodies on the filter pressing plate frames, namely, certain relative motion can be generated between the filter pressing plate frames, the maximum relative displacement of the filter pressing plate frames is limited under the action of an elastic inhaul cable, a plurality of plate frames can be pulled open simultaneously through the elastic inhaul cable, the plate pulling time is saved, and a reset spring is arranged on the limit valve core, so that the limit valve core is always contacted with a pull rod and a positioning self-locking rod.
Optionally, the limiting valve core is sleeved with a return spring, and under the action of the return spring, the limiting valve core can be jacked in the wedge-shaped groove of the pull rod and the positioning self-locking rod. Thereby effectively realizing unidirectional self-locking.
Optionally, the limiting valve body is further connected with an elastic inhaul cable, the filter pressing plate frames are sequentially connected into a whole through the elastic inhaul cable arranged on the limiting valve body on the filter pressing plate frames, and the maximum relative displacement of the filter pressing plate frames is limited under the action of the elastic inhaul cable. Can produce certain relative motion between each filter-pressing sheet frame promptly, restrict its biggest relative displacement under the effect of elastic inhaul cable again, through this elastic inhaul cable, can pull open polylith sheet frame simultaneously, save the arm-tie time, reset spring install on spacing case for spacing case contacts with pull rod and location self-locking pole all the time.
Optionally, the mechanical amplification mechanism includes a cross block, a first hinge rod, a second hinge rod and a third hinge rod, one end of the first hinge rod is hinged to the cross block, the other end of the first hinge rod is connected to one end of the second hinge rod and one end of the third hinge rod, the other end of the second hinge rod is connected to the main push plate, and the other end of the third hinge rod is connected to the auxiliary push plate. The stroke and the force amplification times of the mechanical amplification mechanism can be determined by adjusting the lengths and the installation positions of the hinge rods on the mechanical amplification mechanism, and according to the sludge compression characteristic, the sizes of the cross block, the first hinge rod, the second hinge rod, the third hinge rod and the main push plate and the auxiliary push plate are optimally designed, so that the force amplification mechanism can completely meet the sludge compression characteristic. By adopting the structure, during the second stage dehydration, only the long stroke oil cylinder works, at the moment, the short stroke oil cylinder and the force amplification mechanism move together, when the third stage dehydration is carried out, the main push plate and the long stroke oil cylinder are fixed, the short stroke oil cylinder moves, the two oil cylinders and the force amplification mechanism are creatively combined together to work, the problem that the long stroke is responsible for the large stroke and the small force needed by the large sludge compression amount in the early stage is solved, and the short stroke oil cylinder and the force amplification mechanism are responsible for the small sludge compression amount in the later stage but need the large force enough is solved.
Optionally, the positioning self-locking rod is fixedly installed at different heights of adjacent limiting valve bodies, a wedge-shaped groove is formed in the positioning self-locking rod, a wedge-shaped block corresponding to the wedge-shaped groove of the positioning self-locking rod is also formed in the limiting valve core, the positioning self-locking rod and the limiting valve core can be matched to realize unidirectional positioning and self-locking of the positioning self-locking rod by the limiting valve core, and when the positioning self-locking rod rotates by 180 degrees, the positioning and self-locking of the positioning self-locking rod can be released by the limiting valve core.
Optionally, the upper ends of the main plate, the auxiliary push plate and the thrust plate of the filter-pressing plate frame are provided with high-pressure air inlets, the filter plate is provided with through holes, the high-pressure air inlets are connected with a high-pressure air pump through air pipes, high-pressure air can enter the sludge filter-pressing cavity through the high-pressure air pump, the air pipes, the high-pressure air inlets and the through holes, and the lower ends of the main plate, the auxiliary push plate and the thrust plate of the filter-pressing plate frame are provided with liquid discharge channels and connected with a water outlet valve. Part of water which is difficult to remove by mechanical pressing, such as capillary water, adsorbed water, water in cells and the like, can be brought out in a water vapor mode under the action of high-pressure gas, and the water content of the sludge is further reduced. And when sludge is squeezed to form a mud cake adhered to the filter cloth, the firm mud cake easily blocks the pore channel of the filter medium to block the outflow of water, and the mud cake on the adhered filter cloth is blown open by high-pressure gas at the moment, so that a layer of pores are formed between the mud cake and the filter cloth, the water outflow resistance is greatly reduced, the water easily flows out through the medium, and the dehydration effect is improved.
Optionally, the decrement device further comprises a controller, a pressure sensor and a position sensor, wherein the pressure sensor is installed in the filter pressing plate frame, the position sensor is installed near the main push plate and the auxiliary push plate and used for detecting the positions of the main push plate and the auxiliary push plate, and the controller is electrically connected with the pressure sensor, the position sensor, the motor, the long-stroke oil cylinder, the short-stroke oil cylinder, the air cylinder, the high-pressure air pump, the pneumatic ball valve, the high-pressure mud inlet pump and the water outlet valve respectively to realize automatic control over the system. By adopting the structure, each relevant actuating mechanism can be controlled through the controller and the detection component, and the automation level and the accurate control of the whole device are improved.
Drawings
FIG. 1 is a schematic view of a large-throughput sewage sludge depth reduction apparatus;
FIG. 2 is a partial enlarged view of the position I of the large-throughput sewage sludge depth reduction apparatus;
FIG. 3 is a partial enlarged view of the position II of the large-throughput sewage sludge depth reduction apparatus
As shown in the figure, 1, a long-stroke oil cylinder, 2, a pull rod, 3, a frame, 4, a limit valve core, 5, a reset spring, 6, a steering gear, 7, a motor, 8, a main push plate, 9, a short-stroke oil cylinder, 10, a force amplification mechanism, 11, a secondary push plate, 12, a limit valve body, 13, a rack, 14, an elastic pull rope, 15, a rack support, 16, a filter plate, 17, a high-pressure air inlet hole, 18, a through hole, 19, a filter plate, 20, a reinforcing lining, 21, filter cloth, 22, an air pipe, 23, an air cylinder, 24, a high-pressure air pump, 25, a dust removal device, 26, a pneumatic ball valve, 27, a plunger pump, 28, a mud inlet pipe, 29, a controller, 30, a thrust plate, 31, a pressure sensor, a lock rod, an outer ring, 33, a sealing element, 34, an inner ring, 35, a positioning self-pressing filter, 36, a limit pin, 37, a filtrate discharge channel, 39, a water outlet valve, 40 and a position sensor.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Moreover, the drawings of the present invention are not necessarily to scale, nor are they necessarily to scale, as may be shown and described herein.
As shown in figure 1, the device for deeply reducing sewage sludge based on large treatment capacity comprises a filter pressing plate frame, a long-stroke oil cylinder 1, a short-stroke oil cylinder 9, a mechanical amplification mechanism 10, a plate frame positioning and self-locking mechanism, a filter pressing cavity 37, a main push plate 8, an auxiliary push plate 11, a thrust plate 30, a high-pressure sludge inlet pump 28, a high-pressure gas generator, a high-pressure gas assembly, a rack 3 and the like, wherein the filter pressing plate frame is circular in structure and good in sealing performance and can be square in special requirements, an outer ring 32 and an inner ring 34 are fixedly connected to the left side and the right side of the filter pressing plate frame respectively, a sealing element 33 is arranged on the inner ring 34, the diameter of the inner ring 34 is slightly smaller than that of the outer ring 32, the adjacent filter pressing plate frame, outer ring 32, inner ring 34 and sealing element 33 form a closed cavity with variable volume, the closed cavity is the sludge filter pressing cavity 37, the short-stroke oil cylinder 9 and the mechanical amplification mechanism 10 are arranged in the middle of the main push plate 8 and the auxiliary push plate 11, the high-pressure sludge inlet pump 28 can be a rotor stress pump or a rotor pump, the pressure of which is 1.5-2.0MPa, the pressure of a main plate and the outer ring and the main plate frame and the sealing mechanism and the auxiliary push plate frame are good in the verticality direction.
The long-stroke oil cylinder 1 is fixedly connected with a main push plate 8, the stroke of the long-stroke oil cylinder 1 is the sum of secondary pressing amounts of sludge in all filter pressing cavities, the pressure of the oil cylinder is generally about 20MPa, so that the secondary pressing pressure of the sludge can reach 3-5MPa, the main push plate is also made of high-strength metal, an auxiliary push plate 11 is fixedly connected with a filter pressing plate frame, a short-stroke oil cylinder 9 and a pull rod 2 are also fixedly connected to the main push plate 8, the auxiliary push plate 11 is also fixedly connected with a pull rod 2, the pull rod 2 on the auxiliary push plate 11 can move in a hole formed in the main push plate 8, a wedge-shaped groove is also formed in the pull rod 2, the pull rod 2 fixed on the main push plate 8 penetrates through a limiting valve body 12 arranged on a rack 3 and corresponds to limiting valve cores 4 arranged on the limiting valve body 12 one by one, the pull rods 2 fixed on the auxiliary push plate 11 correspond to the limiting valve cores 4 arranged on the main push plate 8 one by one, the limiting valve cores 4 are connected with a steering gear 6, and a motor 7 of the steering gear 6 is connected with a motor 7.
The mechanical amplification mechanism 10 is composed of a cross block 10-1, a first hinge rod 10-2, a second hinge rod 10-3 and a third hinge rod 10-4 respectively, the mechanical amplification mechanism 10 is hinged with a main push plate 8, an auxiliary push plate 11 and a short stroke oil cylinder 9 respectively, the force amplification factor can reach 10-20 times through the mechanical amplification mechanism, the oil pressure or the area of the short stroke oil cylinder can be correspondingly reduced by 10-20 times, and the stroke and the force amplification factor of the mechanical amplification mechanism 10 can be realized by adjusting the length and the installation position of the hinge rod on the mechanical amplification mechanism, so that the motion and the mechanical property of the mechanical amplification mechanism conform to the sludge compression property. And under the action of force amplification and the oil pressure of the short-stroke oil cylinder, the sludge is squeezed for the third time, and the squeezing pressure is 8-10MPa.
The filter-pressing plate frame comprises a main plate 16, filter plates 19, reinforcing liners 20 and filter cloth 21, wherein the main plate 16 and the filter plates 19 are made of high-strength metal materials, the filter plates 19 are respectively arranged on two sides of the main plate 16, a short limit pin 36 is arranged between the main plate 16 and the filter plates 19, the limit pin 36 is uniformly distributed on the main plate 16, holes matched with the limit pin 36 are formed in the main plate 16, the height of the limit pin 36 is about 5-10mm, a certain gap is reserved between the main plate 16 and the filter plates 19, a plurality of salient points, water outlet grooves and through holes 18 are formed in the filter plates 19, the structural main body of the filter plates 19 is similar to the structure of the filter plates of the diaphragm plate frame filter press, the reinforcing liners 20 and the filter cloth 21 are sequentially arranged outside, the reinforcing liners 20 are fixed on the filter plates 19, the filter cloth 21 is fixed on the main plate 16, the filter-pressing plate frame is respectively provided with the main plate 16, the limit pin 36, the filter plates 19, the reinforcing liners 20 and the filter cloth 21 are all provided with sludge inlet holes in the center positions, so that sludge can sequentially enter a lower group of filter-pressing plate frame from the sludge holes.
The filter-pressing plate frame is further fixedly connected with a limiting valve body 12, a limiting valve core 4 and a reset spring 5 are arranged in the limiting valve body 12, a positioning self-locking rod 35 and an elastic inhaul cable 14 are fixedly connected to the limiting valve body 12, each limiting valve core 4 is connected with a steering gear 6, the steering gear 6 connected with the limiting valve core 4 on the filter-pressing plate frame is meshed with a rack 13, the rack 13 is connected with a cylinder 23, the rack 13 is fixed on a rack guide rail 15, the filter-pressing plate frame is sequentially connected into a whole through the elastic inhaul cable 14 arranged on the limiting valve body 12 on the filter-pressing plate frame, namely, certain relative motion can be generated between each filter-pressing plate frame, the maximum relative displacement of the filter-pressing plate frame is limited under the action of the elastic inhaul cable 14, and the reset spring 5
The positioning self-locking rod 35 is fixedly arranged at different heights of the adjacent limiting valve bodies 12, a wedge-shaped groove is formed in the positioning self-locking rod 35, a wedge-shaped block corresponding to the wedge-shaped groove of the positioning self-locking rod 35 is also formed in the limiting valve core 4, the positioning self-locking rod 35 can be unidirectionally positioned and self-locked by the limiting valve core 4 through cooperation of the wedge-shaped block and the wedge-shaped block, and when the positioning self-locking rod rotates by 180 degrees, the positioning self-locking rod 35 can be unlocked by the limiting valve core 4.
The upper ends of the main board 16, the auxiliary push board 11 and the thrust board 30 of the filter-pressing board frame are all provided with high-pressure air inlet holes 17, the filter board 19 is provided with through holes 18, the high-pressure gas generator and the assembly comprise high-pressure air pumps 24 and air pipes 22, the high-pressure air inlet holes 17 are connected with the high-pressure air pumps 24 through the air pipes 22, the high-pressure gas can enter the sludge filter-pressing cavity 37 through the high-pressure air pumps 24, the air pipes 22, the high-pressure air inlet holes 17 and the through holes 18, and the lower ends of the main board 16, the auxiliary push board 11 and the thrust board 30 of the filter-pressing board frame are all provided with liquid discharge channels 38 and are connected with a water outlet valve 39.
The device for deeply reducing the sewage and sludge with large treatment capacity is also provided with a controller 29, a pressure sensor 31 and a position sensor 40, wherein the pressure sensor is arranged in a filter-pressing plate frame, the position sensor is arranged near the main push plate 8 and the auxiliary push plate 11 and is used for detecting the positions of the main push plate 8 and the auxiliary push plate 11, and the controller 29 is respectively electrically connected with the pressure sensor 31, the position sensor 40, the motor 7, the long-stroke oil cylinder 1, the short-stroke oil cylinder 9, the air cylinder 23, the high-pressure air pump 24, the pneumatic ball valve 26, the high-pressure sludge inlet pump 28 and the water outlet valve 39 so as to realize the automatic control of the system.
The water outlet valve 39 is an electromagnetic water outlet valve and can be opened and closed by an automatic controller. The sewage and sludge deep reduction device with large treatment capacity also comprises a dust removal device 24, the dust removal device 24 removes sludge and dust brought by high-pressure gas through negative pressure, and the primary sedimentation device can be a cloth bag, a cyclone separator or the combination of the cloth bag and the cyclone separator.
The working principle of the device is as follows: each filter pressing plate frame is pushed to the side of the thrust plate by the long-stroke oil cylinder, at the moment, the inner ring and the sealing element enter the outer ring to form interference fit, a closed sludge filter pressing cavity is formed among the inner ring, the sealing ring, the outer ring and the adjacent filter pressing plate frames, and the positioning self-locking rod can freely penetrate through a limiting valve body hole under the action of the limiting valve core in the direction. The pneumatic ball valve is opened, slurry is pumped into a filter pressing cavity by a high-pressure mud feeding pump, the filter pressing cavity close to a thrust plate firstly enters the high-pressure mud feeding pump, a filter pressing plate frame moves towards a direction (towards the left) far away from the thrust plate under the pressure of the mud feeding pump, a positioning self-locking rod fixed on the filter pressing plate frame also moves towards the left, when a wedge block on a limiting valve core just cuts into a wedge groove of the positioning self-locking rod, at the moment, two filter pressing plate frames are fixed, the size of the filter pressing cavity is the initial volume size of the sludge, the slurry is filled in a first filter pressing cavity and starts to enter a second cavity, the left filter pressing plate frame of the second cavity is pushed to move away from the direction (towards the left) of the thrust plate, the positioning self-locking rod fixed on the filter pressing plate frame similarly moves towards the left, when the wedge block on the limiting valve core just cuts into the wedge groove of the positioning self-locking rod, the two adjacent filter pressing plate frames are fixed, and the filter pressing plates are pushed according to the example, and when the sludge enters the last cavity, the filter pressing plates are all connected into a whole to be positioned at the leftmost end. Under the action of feeding pressure, the pressure of the sludge is between 1.5 and 2.0MPa, the slurry is continuously pumped, water enters a water outlet groove and a through hole on a filter plate through filter cloth and a reinforcing lining and is discharged from a water outlet valve, the sludge is left in a filter pressing cavity, after a period of feeding dehydration, the filter pressing cavity is filled, the slurry cannot enter, and at the moment, a pneumatic ball valve is closed, and the sludge feeding is stopped. After the first stage of feed dehydration is finished, the second stage of squeezing dehydration is carried out, the long-stroke oil cylinder starts to work, the pull rod is locked firmly by the limiting valve core on the main push plate, at the moment, the pull rod, the main push plate, the auxiliary push plate, the force amplification mechanism, the short-stroke oil cylinder and the like can be regarded as a whole, the pull rod fixed on the main push plate can freely move on the limiting valve body, under the action of the long-stroke oil cylinder, the oil cylinder pushes the pull rod, the main push plate, the auxiliary push plate, the force amplification mechanism and the short-stroke oil cylinder to move forwards, hydraulic pressure acts on the filter press plate frame and sludge through the auxiliary push plate to carry out second stage squeezing dehydration on the sludge, at the moment, the squeezing pressure is 3-5MPa, the sludge is squeezed into mud cakes to be attached to the filter cloth when the second stage squeezing is carried out, the water is blocked by the filter cloth, and the more the pressure is, the more the sludge is squeezed to be attached to the filter cloth, the larger the resistance of water passing through the filter cloth is, the larger the resistance of the water passing through the filter cloth is, the reverse direction of an oil path of the long-stroke oil cylinder drives the pull rod, the main push plate, the auxiliary push plate, the force amplification mechanism, the short-stroke oil cylinder and the filter press plate frame to move back, the controller controls the high-pressure air pump to start working, high-pressure air passes through the high-pressure air inlet hole and the through hole on the main board to carry out back flushing on the filter cloth, the mud cake attached to the filter cloth is blown away by the high-pressure air, meanwhile, sludge particles attached to the filter cloth are blown away, the filter cloth is cleaned, certain water in sludge is also taken away by the high-pressure air, after the high-pressure air blows through, the long-stroke oil cylinder drives the pull rod, the main push plate, the auxiliary push plate, the mechanical amplification mechanism, the short-stroke oil cylinder and the filter press plate frame to move forward continuously, and after a period of squeezing dehydration, the second-stage dehydration is finished, and the third-stage ultrahigh-pressure dehydration stage is carried out. At third stage dehydration stage, spacing case carries out spacing auto-lock to the pull rod, it is then fixed that main push pedal passes through the pull rod, at this moment, short stroke hydro-cylinder begins work, the mechanism motion of amplification of drive force and then promote vice push pedal forward motion, rotate 180 with pull rod matched with spacing case this moment, spacing case is relieved to the location auto-lock of pull rod, drive the pull rod motion while vice push pedal motion, vice push pedal motion carries out further squeezing to mud, mud squeezing pressure is 8-10MPa this moment, extrude more moisture, when mechanical squeezing, high-pressure gas gets into, more moisture that is difficult to deviate from through mechanical squeezing in the mud is taken out through vapor, when treating that the outlet valve does not have water almost, third stage squeezes and stops, whole dehydration process finishes. In the mud discharging stage, the air cylinder drives the rack to move, the rack is meshed with the steering gear, the steering gear rotates 180 degrees, the steering gear drives the limit valve core to rotate 180 degrees, the positioning self-locking of the limit valve core and the positioning self-locking rod is released, oil circuits of the short-stroke oil cylinder and the long-stroke oil cylinder are reversed, the auxiliary push plate, the force amplification mechanism and the main push plate are driven to move back, the pull plate mechanism pulls the filter plate frames to move left, under the action of the elastic zipper, a plurality of filter plate frames can be pulled simultaneously, the inner ring is separated from the outer ring because the length of the elastic zipper exceeds the thickness of the inner ring, the outer ring and the sludge, the matching between the inner ring and the outer ring does not exist, the closed filter pressing cavity disappears, the sludge can fall to the conveying mechanism below the device from the gap between the filter plate frames, after the mud discharging is finished, the oil cylinder pushes all the filter plate frames to the leftmost end again, and enters the next cycle.
The method for deeply reducing the sewage sludge with large treatment capacity based on the device comprises the following more specific steps:
(1) Each filter pressing plate frame is pushed to the side of the thrust plate by the long-stroke oil cylinder, a closed sludge filter pressing cavity is formed among the inner ring, the sealing ring, the outer ring and the adjacent filter pressing plate frames, and the positioning self-locking rod penetrates through the limiting valve body hole;
(2) The pneumatic ball valve is opened, the high-pressure mud inlet pump pumps the slurry into the filter pressing cavity, the filter pressing plate frames move towards the direction (towards the left) far away from the thrust plate under the pressure of the slurry, the positioning self-locking rod fixed on the filter pressing plate frames moves towards the left, the wedge block on the limiting valve core is cut into the wedge groove of the positioning self-locking rod, the relative position between the two filter pressing plate frames is fixed, and the size of the filter pressing cavity is the initial volume size of the sludge;
(3) Slurry enters, the first filter pressing cavity is filled with the slurry and enters the second cavity, a left filter pressing plate frame of the second cavity is pushed to move away from the thrust plate (to the left), and the two filter pressing plate frames are fixed by the limiting valve core and the positioning self-locking rod in the same way;
(4) Under the action of feeding pressure, the pressure of the sludge is between 1.5 and 2.0MPa, the slurry is continuously pumped, water enters a water outlet groove and a through hole on a filter plate through filter cloth and a reinforcing liner and is discharged from a water outlet valve, the sludge is left in a filter pressing cavity, after a period of feeding dehydration, the filter pressing cavity is filled, the slurry cannot enter, a pneumatic ball valve is closed, the sludge feeding is stopped, and the first-stage feeding dehydration is finished;
(5) Starting the second stage of dehydration, starting the long-stroke oil cylinder to work, locking the pull rod firmly by a limiting valve core on the main push plate, pushing the pull rod, the main push plate, the auxiliary push plate, the force amplification mechanism and the short-stroke oil cylinder to move forwards by the oil cylinder under the action of the long-stroke oil cylinder, and performing second stage squeezing dehydration on the sludge under the action of hydraulic pressure on the filter pressing plate frame and the sludge through the auxiliary push plate, wherein the squeezing pressure is 3-5MPa at the moment;
(6) The oil way of the long-stroke oil cylinder is reversed to drive the pull rod, the main push plate, the auxiliary push plate, the force amplification mechanism, the short-stroke oil cylinder and the filter-pressing plate frame to move back;
(7) The controller controls the high-pressure air pump to start working, high-pressure air carries out back blowing on the filter cloth through the high-pressure air inlet and the through hole on the main board, mud cakes attached to the filter cloth are blown open by the high-pressure air, meanwhile, sludge particles adhered to the filter cloth are blown off, the filter cloth is cleaned, and the high-pressure air also carries away certain moisture in the sludge;
(8) The long-stroke oil cylinder drives the pull rod, the main push plate, the auxiliary push plate, the force amplification mechanism, the short-stroke oil cylinder and the filter pressing plate frame to continuously move forwards, and after a period of squeezing dehydration, secondary dehydration is finished;
(9) Entering a third ultrahigh pressure dehydration stage. In a third stage of dehydration, the short stroke oil cylinder starts to work, the amplification mechanism of the driving force moves to further drive the auxiliary push plate to move forwards, the limiting valve core matched with the pull rod rotates 180 degrees at the moment, the positioning self-locking of the limiting valve core on the pull rod II is released, the auxiliary push plate drives the pull rod to move while moving, the auxiliary push plate moves to further squeeze sludge, the sludge squeezing pressure is 8-10MPa at the moment, and more water is squeezed;
(9) And (3) when the mechanical pressing is carried out, high-pressure gas enters, more water which is difficult to remove in the sludge through the mechanical pressing is carried out through water vapor, when the water outlet valve hardly discharges water, the third-stage pressing is stopped, and the whole dewatering process is finished.
(10) In the mud unloading stage, the air cylinder drives the rack to move, the rack is meshed with the steering gear, the steering gear rotates 180 degrees, the steering gear drives the limiting valve core to rotate 180 degrees, the oil paths of the short-stroke oil cylinder and the long-stroke oil cylinder are reversed, the auxiliary push plate, the force amplification mechanism and the main push plate are driven to move back, the pull plate mechanism pulls the filter press plates to move left, under the action of elastic zipper, a plurality of filter press plates can be pulled simultaneously, and the sludge falls from gaps between the filter plates to the conveying mechanism below the device and is conveyed out;
(11) And after the mud is discharged, the oil cylinder pushes all the filter pressing plate frames to the leftmost end again to enter the next cycle.
The foregoing is illustrative of the preferred embodiments of the present invention only and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. In general, all changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (5)
1. A large-treatment-capacity sewage sludge depth reduction method is based on a large-treatment-capacity sewage sludge depth reduction device, and is characterized in that: the deep reduction device for sewage and sludge with large treatment capacity comprises filter press plates, a long-stroke oil cylinder (1), a short-stroke oil cylinder (9), a mechanical amplification mechanism (10) and a high-pressure sludge inlet pump (28), wherein a filter press cavity (37) is formed between the filter press plates, the left side and the right side of each filter press plate are respectively and fixedly connected with an outer ring (32) and an inner ring (34), the outer ring (32) and the inner ring (34) of two adjacent filter press plates are tightly matched, and a sealing element (33) is arranged on each inner ring (34); the output end of the long-stroke oil cylinder (1) is fixedly connected with the main push plate (8), the mechanical amplification mechanism (10) is arranged between the main push plate (8) and the auxiliary push plate (11), the short-stroke oil cylinder (9) is arranged on the main push plate (8), the output end of the short-stroke oil cylinder (9) is connected with the mechanical amplification mechanism (10), and the auxiliary push plate (11) acts on the pressure filtration cavity (37);
wherein, the long-stroke oil cylinder (1) pushes each filter pressing plate frame forwards, so that a filter pressing cavity (37) is formed between the filter pressing plate frames; the high-pressure sludge inlet pump (28) pumps sewage sludge into the filter-pressing cavity (37) to realize feed dehydration; the long-stroke oil cylinder (1) continues to be pushed so as to realize high-pressure dehydration of sewage sludge; on the basis of the work of the long-stroke oil cylinder (1), the short-stroke oil cylinder (9) further acts on the main push plate through a mechanical amplification mechanism (10) to realize ultrahigh-pressure dehydration;
the main push plate (8) is fixedly connected with a pull rod (2), the auxiliary push plate (11) is also connected with the pull rod (2), the pull rod (2) is also provided with a wedge-shaped groove, the pull rod (2) fixed on the main push plate (8) penetrates through a limiting valve body (12) arranged on the rack (3) and is in one-to-one correspondence with limiting valve cores (4) arranged on the limiting valve body (12), the pull rod (2) fixed on the auxiliary push plate (11) is in one-to-one correspondence with the limiting valve cores (4) arranged on the main push plate (8), the limiting valve cores (4) are connected with a steering gear (6), and the steering gear (6) is connected with a motor (7);
a limiting valve body (12) and a positioning self-locking rod (35) are also fixedly arranged on the filter pressing plate frame, a limiting valve core (4) is arranged in the limiting valve body (12), the limiting valve cores (4) are correspondingly connected with steering gears (6), the steering gears (6) connected with the limiting valve cores (4) on the filter pressing plate frame are meshed with racks (13), the racks (13) are connected with air cylinders (23), the racks (13) are fixed on rack guide rails (15), and the positioning self-locking rod (35) is also connected on the limiting valve body (12);
the limiting valve core (4) is sleeved with a return spring (5), and under the action of the return spring (5), the limiting valve core (4) can be propped in wedge-shaped grooves of the pull rod (2) and the positioning self-locking rod (35);
the mechanical amplification mechanism (10) comprises a cross block (10-1), a first hinge rod (10-2), a second hinge rod (10-3) and a third hinge rod (10-4), one end of the first hinge rod (10-2) is hinged to the cross block (10-1), the other end of the first hinge rod (10-2) is respectively connected with one ends of the second hinge rod (10-3) and the third hinge rod (10-4), the other end of the second hinge rod (10-3) is connected to the main push plate (8), and the other end of the third hinge rod (10-4) is connected to the auxiliary push plate (11);
location from locking lever (35) fixed mounting at the co-altitude not of adjacent limiting valve body (12), set up the wedge groove on location from locking lever (35), spacing case (4) on also set up with the corresponding wedge block in wedge groove of location from locking lever (35), both cooperations can realize that spacing case (4) are to location and auto-lock that location is from locking lever (35) one-way, when location from locking lever rotated 180 angles, spacing case (4) are to location and auto-lock release from locking lever (35).
2. The method for deeply reducing the sewage sludge with large treatment capacity according to claim 1, which is characterized in that: the filter-pressing sheet frame include mainboard (16), filter plate (19), strengthen lining (20) and filter cloth (21), mainboard (16) both sides be provided with filter plate (19) respectively, mainboard (16) and filter plate (19) in the middle of set up short spacer pin (36) for keep certain clearance between mainboard (16) and filter plate (19), the filter plate outwards is equipped with in proper order and strengthens lining (20) and filter cloth (21), strengthen lining (20) and fix on filter plate (19), mainboard (16), short spacer pin (36), filter plate (19), strengthen lining (20) and filter cloth (21) central point put and all set up into the mud hole, make mud can follow into in the mud hole gets into a set of filter-pressing sheet frame down in proper order.
3. The method for deeply reducing the sewage sludge with large treatment capacity according to claim 2, which is characterized in that: the limiting valve body (12) is further connected with an elastic inhaul cable (14), the filter pressing plate frames are sequentially connected into a whole through the elastic inhaul cable (14) arranged on the limiting valve body (12) on the filter pressing plate frames, and the maximum relative displacement of the filter pressing plate frames is limited under the action of the elastic inhaul cable (14).
4. The method for deeply reducing the sewage sludge with large treatment capacity according to claim 2, which is characterized in that: the upper end of mainboard (16), vice push pedal (11), thrust plate (30) of filter-pressing sheet frame all seted up high pressure inlet port (17), filter plate (19) on seted up through-hole (18), high pressure inlet port (17) link to each other with high pressure air pump (24) through trachea (22), high-pressure gas can enter into in filter-pressing chamber (37) through high pressure air pump (24), trachea (22), high pressure inlet port (17), through-hole (18), the lower extreme of mainboard (16), vice push pedal (11), thrust plate (30) of filter-pressing sheet frame all seted up liquid discharge channel (38) and be connected with outlet valve (39).
5. The method for deeply reducing the sewage sludge with large treatment capacity according to claim 4, wherein the method comprises the following steps: the device of minimizing still includes controller (29), pressure sensor (31), position sensor (40), pressure sensor install in the filter-pressing sheet frame, position sensor install near main push pedal (8) and vice push pedal (11) for detect the position of main push pedal (8) and vice push pedal (11), controller (29) respectively with pressure sensor (31), position sensor (40), motor (7), long stroke hydro-cylinder (1), short stroke hydro-cylinder (9), cylinder (23), high pressure air pump (24), pneumatic ball valve (26) and high pressure advance mud pump (28), outlet valve (39) electricity and be connected, realize the automatic control to the system.
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| CN107382009A (en) * | 2017-07-28 | 2017-11-24 | 浙江海河环境科技有限公司 | Super-pressure sludge high-drying degree dewatering |
| CN107324630A (en) * | 2017-07-28 | 2017-11-07 | 浙江海河环境科技有限公司 | Super-pressure sludge high-drying degree dehydration device |
| CN108363367A (en) * | 2018-01-15 | 2018-08-03 | 南京中高知识产权股份有限公司 | A kind of sewage disposal system and its working method based on Cloud Server |
| CN109231769B (en) * | 2018-10-30 | 2023-12-26 | 深圳市中科绿建环保工程有限公司 | Mechanical filter-pressing microwave coupling dehydration desiccation integrated device |
| CN109578375A (en) * | 2019-01-23 | 2019-04-05 | 中国人民解放军军事科学院国防工程研究院 | Gas-liquid boosting hydraulic cylinder |
| CN113698062B (en) * | 2021-09-07 | 2024-03-08 | 聂麒曌 | Full-automatic horizontal deep solid-liquid separator and working method thereof |
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| JPS5775109A (en) * | 1981-08-31 | 1982-05-11 | Kurita Mach Mfg Co Ltd | Locking device of movable plate of filter press |
| CN104817247A (en) * | 2015-04-15 | 2015-08-05 | 崔笛 | Pressure electric osmosis drier |
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| GB1345064A (en) * | 1971-09-23 | 1974-01-30 | ||
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