CN107998707B - Electromagnetic force filter pressing dewatering device for sewage and sludge - Google Patents
Electromagnetic force filter pressing dewatering device for sewage and sludge Download PDFInfo
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- CN107998707B CN107998707B CN201810092339.7A CN201810092339A CN107998707B CN 107998707 B CN107998707 B CN 107998707B CN 201810092339 A CN201810092339 A CN 201810092339A CN 107998707 B CN107998707 B CN 107998707B
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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
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/164—Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates
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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
- 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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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a sewage sludge electromagnetic force filter pressing dehydration device, which comprises a plurality of filter pressing chambers, wherein each filter pressing chamber comprises a middle main filter plate (9) and a middle auxiliary filter plate (10), electromagnetic modules are arranged on the middle main filter plate (9) and the middle auxiliary filter plate (10), and the middle main filter plate (9) and the middle auxiliary filter plate (10) in the same filter pressing chamber are mutually attracted through the electromagnetic modules; the adjacent filter pressing chambers are communicated through a hose (12), and the hose (12) is communicated with a mud inlet pipe; a limit rope (31) for limiting the maximum displacement of the two filter plates is arranged between the two adjacent filter plates; each electromagnetic module comprises an electromagnetic iron core (6) and an electromagnetic coil (7), and the electromagnetic coil (7) is wound on the corresponding electromagnetic iron core (6). The invention adopts electromagnetic force, and has the advantages of few vulnerable parts, no need of hydraulic system, low energy consumption and lower water content of dehydrated sludge.
Description
Technical Field
The invention relates to the field of sewage sludge treatment, in particular to a sewage sludge electromagnetic force filter pressing dehydration device.
Background
In the prior art, more sludge deep dehydration equipment appears in the market is a diaphragm plate-and-frame filter press, the efficiency is lower during dehydration, the squeezing pressure is only 1.6MPa, water is injected into the diaphragm plate frame by a high-pressure water pump during squeezing, the diaphragm is inflated to reduce the area of a filter chamber, and the diaphragm plate frame is squeezed by virtue of plastic deformation of the plate frame; the diaphragm plate frame has small compression ratio and long relative working period. In addition, on the structure of the common elastic pressing plate frame in the market, the filtering plates are all integral injection molding modules, the filtering plates are easy to damage and deform, and the damaged filtering plates need to be replaced integrally, so that the maintenance cost is higher, more importantly, due to the structural characteristics and the low pressing pressure, the current diaphragm plate frame filter press can be used for pressing and dehydrating municipal sludge to about 60%, the water content of the diaphragm plate frame filter press is reduced greatly compared with that of the prior plate frame filter press, the diaphragm bulge produces secondary pressing on the sludge, namely, the sludge press chamber is a variable chamber, but lime and ferric salt with the absolute sludge amount of about 30% are required to be added into the device, so that the sludge amount is greatly increased, the added lime, ferric chloride and the like bring adverse effects to the subsequent treatment and disposal of the sludge, and the reduction and harmless principles of the sludge treatment and disposal are violated.
The ultra-high pressure elastic squeezing sludge dewatering machine mainly comprises a high-pressure oil cylinder, an ultra-high pressure filter plate, a distributing plate, a spring medium, special filter cloth, a rear end auxiliary filter plate, a push plate, a main beam and the like. The dewatering process of the squeeze plate is mainly divided into two stages, wherein the first stage is to convey materials to a filter chamber by a feed pump, and the solid-liquid separation is carried out by the pressure of the feed pump while feeding, namely, one-time filtration and dewatering; the second stage is elastic squeezing, one end of the device is fixed, the other end applies external pressure through a hydraulic cylinder, and the material is squeezed through an elastic force transfer device (spring) to carry out secondary dehydration. By carrying out ultrahigh pressure squeezing on the sludge, the squeezing pressure is about 5MPa, and a high-pressure oil pump is required to provide about 25-30MPa, so that the water content of the sludge can be reduced to about 50%. In addition, the ultra-high pressure elastic squeezer realizes ultra-high pressure squeezing by arranging the springs to change the volume of the sludge squeezing chamber, and because the springs are often subjected to processes of extension, compression and the like, the springs are required to bear alternating loads and are easy to be damaged by fatigue, the springs are easy to be damaged by fatigue, 10-20 high-strength springs are required between each group of plate frames, approximately 1000-2000 high-strength springs are required for 50-100 plate frames, the initial elastic action of the springs is overcome when the springs are squeezed, and the actual squeezing pressure of sludge is smaller than the pressure provided by an ultra-high pressure oil pump when the springs are squeezed for the second time. For example, at a feed pressure of 1MPa, the spring must provide an elastic force of greater than 1MPa so that the chamber between the filter plate and the filter frame is kept to a maximum, and when the high-pressure pump presses the sludge for the second time at the end of the feed pressing, the spring must be overcome, and this partial pressure is the consumed pressure, so that the pressure generated by the high-pressure pump on the sludge is smaller than the actual pressure.
There is also an ultrahigh pressure diaphragm plate-and-frame filter press in the market at present, the device is an upgrade on the original diaphragm plate-and-frame filter press, the pressure of nearly 10MPa is provided for the sludge by injecting 10MPa water into the diaphragm, the two-stage squeezing process is also adopted, namely, the feeding pressure is started, then high-pressure liquid is injected into the diaphragm, the diaphragm is inflated to further squeeze and dewater the sludge, and the water content of municipal sludge can be reduced to about 50% after the sludge is dewatered by the device. One major problem with this device is the life of the diaphragm at such high pressures and large deformations.
The diaphragm plate-and-frame filter press, the high-pressure elastic machine and other devices are all used for providing power for the sludge squeezing and dewatering through the high-pressure oil cylinder, a special hydraulic system is needed to be configured, and the pressure of the hydraulic system is very high when the pressure is high. When the mud is discharged, the filter plates are required to be pulled apart, a special plate pulling device is required to be arranged to pull apart the filter plates one by one, the plate pulling efficiency is low, the time is long, and the whole working time is influenced.
From the above analysis, it can be seen that the variability of the volume of the sludge press chamber must be achieved in order to achieve deep dewatering of the sludge, while the sludge is pressed under high pressure. Both diaphragm plate-and-frame presses and ultra-high pressure elastic presses have variability in the sludge press chamber, but the current deep sludge dewatering equipment has several major problems: (1) The common diaphragm plate-and-frame filter press has smaller sludge squeezing pressure and enough ultrahigh pressure diaphragm plate-and-frame filter press squeezing pressure, but the service life of the diaphragm is a problem; (2) The ultrahigh pressure elastic squeezer realizes the change of the volume of the sludge squeezing chamber by means of springs, and the springs are easy to damage and consume a large amount of squeezing pressure; (3) The larger the pressure is, the stronger the sludge clinging to the filter plate is, so that a compact sludge layer is easy to form, the sludge layer is bonded on the filter cloth, the water discharge resistance is increased, and the dewatering effect is affected; (4) Due to the high compressibility and high water content of sewage and sludge and the characteristic of difficult sludge dehydration caused by capillary water, adsorbed water and internal water contained in the sewage and sludge, the sludge is difficult to be dehydrated deeply by completely adopting mechanical pressure, so that the water content of the sludge reaches a lower level.
Disclosure of Invention
In view of the above, the invention provides a sewage sludge electromagnetic force filter pressing dehydration device which adopts electromagnetic force and does not need a hydraulic system, thereby reducing the complexity of the device and saving the cost and energy consumption.
The technical scheme of the invention is that the electromagnetic force filter-pressing dehydration device for sewage sludge comprises a plurality of filter-pressing chambers, wherein each filter-pressing chamber comprises a middle main filter plate and a middle auxiliary filter plate, electromagnetic modules are arranged on the middle main filter plate and the middle auxiliary filter plate, and the middle main filter plate and the middle auxiliary filter plate in the same filter-pressing chamber are mutually attracted through the electromagnetic modules; the adjacent filter pressing chambers are communicated through a hose, and the hose is communicated with a mud inlet pipe; a limit rope for limiting the maximum displacement of the two filter plates is arranged between the two adjacent filter plates; each electromagnetic module comprises an electromagnetic iron core and an electromagnetic coil, and the electromagnetic coil is coiled on the corresponding electromagnetic iron core.
Alternatively, the electromagnetic force between the middle main filter press plate and the middle auxiliary filter press plate in the filter press chamber and the electromagnetic force between the adjacent filter press chambers can be switched between the repulsive force and the attractive force.
Optionally, the electromagnetic filter pressing dehydration device further comprises a head plate and a tail plate, wherein the head plate is located at the front end of the first filter pressing chamber, a through hole for the mud inlet pipe to pass through is formed in the head plate, and the tail plate is located at the rear end of the last filter pressing chamber.
Optionally, a main filter plate supporting plate frame is arranged on the middle main filter plate, bosses are arranged on two sides of the middle auxiliary filter plate, the main filter plate supporting plate frame, the head plate and the tail plate, a limiting rod provided with a clamping groove is arranged on the boss of the main filter plate supporting plate frame, a bolt mechanism is arranged on the middle auxiliary filter plate, and when limiting, a sliding block of the bolt mechanism is inserted into the clamping groove of the limiting rod.
Optionally, the electromagnetic filter pressing dewatering device further comprises a rack support, a rack and a clamping mechanism, wherein the rack support is vertically fixed on the head plate, the rack is fixed on the rack support and is parallel to the filter pressing direction, the tail end of the rack is fixed on the frame, the clamping mechanism is installed on the tail plate, and the tail plate can only move unidirectionally towards the head plate when the rack is clamped by the clamping mechanism under the clamping state.
Optionally, the screens mechanism includes screens smooth tooth, screens slide rail, smooth tooth reset spring and smooth tooth drive electro-magnet, screens smooth tooth and rack mutually support, and slide in the screens slide rail, smooth tooth reset spring cover is located on the screens smooth tooth, through the switching of circular telegram and outage of smooth tooth drive electro-magnet, realize the state switching that breaks away from and block of screens smooth tooth and rack.
Optionally, the bolt mechanism includes stopper electromagnetic core, stopper coil, spring baffle, reset spring, slider and spacing slide rail, stopper electromagnetic core fixes on spacing slide rail, and the stopper coil winding is in stopper electromagnetic core, the slider sets up in spacing slide rail to be connected with reset spring, simultaneously, stopper electromagnetic core and stopper coil are right under the switch-on state the slider produces magnetic attraction.
Optionally, the latch mechanism further includes a spring baffle, one side of the spring baffle abuts against the electromagnetic iron core, the other end of the spring baffle is connected with the return spring, and the other end of the return spring is connected with the sliding block.
Optionally, the outer lane of middle main filter press board open and to have the semicircle recess and be used for installing the sealing washer, the sealing washer diameter be less than middle main filter press board external diameter, middle main filter press board and middle auxiliary filter press board are equipped with from inside to outside and are equipped with enhancement lining and filter cloth, middle auxiliary filter press board, middle main filter press board, middle sealing washer, enhancement lining and filter cloth constitute a changeable filter pressing cavity of volume.
Optionally, the upper parts of the middle main filter press plate and the middle auxiliary filter press plate are respectively provided with a high-pressure air inlet hole and are communicated with corresponding air inlet branch pipes, and high-pressure air can enter the filter pressing cavity through a high-pressure air pump, an air inlet main pipe, the air inlet branch pipes and the high-pressure air inlet holes; the lower ends of the main filter pressing plate and the auxiliary filter pressing plate are respectively provided with a liquid discharge through hole which is connected with a filter plate drainage branch pipe, and the drainage branch pipe is communicated with a drainage main pipe.
By adopting the structure, compared with the prior art, the invention has the following advantages: (1) The variable-volume cavity formed between the main filter press plate and the auxiliary filter press plate meets the high compressibility characteristic of sludge, and easily damaged parts such as springs, diaphragms and the like are not adopted, so that the reliability of equipment is improved, and the service life of the equipment is prolonged; (2) The sludge can be dehydrated for the first time by adopting the high-pressure feeding pressure; then increasing coil current and electromagnetic force to gradually increase the pressure between the main filter press plate and the auxiliary filter press plate, gradually pressurizing the sludge, and performing second-stage squeezing dehydration; finally, the clamping sliding teeth are clamped on the racks, and meanwhile, the current direction of the coil is changed to enable attractive force between the filter pressing chambers to be kept continuously, and the two sides of the chambers become repulsive force to further squeeze sludge in the filter pressing chambers; because still some moisture can not get rid of through mechanical system in the mud, this scheme has adopted high-pressure gas generator and subassembly, through high-pressure gas effect, takes away the moisture that mechanical system was difficult to the desorption in the mud through high-pressure air current mode, realizes mechanical squeezing and air current dual effect promptly to further reduce the moisture of mud, reach the degree of depth reduction purpose of mud.
Drawings
FIG. 1 is a front view of an electromagnetic force filter pressing dehydration device for sewage sludge in the invention;
FIG. 2 is a top view of the electromagnetic force filter pressing dehydration device for sewage sludge of the invention;
FIG. 3 is a cross-sectional view of the electromagnetic force filter-pressing dehydration device for sewage sludge of the present invention;
FIG. 4 is a partial enlarged view of a cross-sectional view of the electromagnetic force filter-pressing dehydration device for sewage sludge of the present invention;
FIG. 5 is a partial two-enlarged view of a cross-sectional view of the electromagnetic force filter-pressing dehydration device for sewage sludge of the present invention;
FIG. 6 is a three-dimensional view of a plunger mechanism in the electromagnetic force filter pressing dehydration device for sewage sludge of the present invention;
FIG. 7 is an isometric view of a main filter plate support plate frame in the sewage sludge electromagnetic force filter pressing dehydration device of the invention;
FIG. 8 is an isometric view of a tailboard and a clamping mechanism thereon in the electromagnetic force filter pressing dehydration device for sewage sludge of the invention;
FIG. 9 is an isometric view of a sewage sludge electromagnetic force filter press dehydration device of the invention;
FIG. 10 is a schematic diagram showing the state of the electromagnetic force filter-pressing dehydration device for sewage sludge when the dehydration device is sucked;
FIG. 11 is a schematic diagram showing a state of the electromagnetic force filter-pressing dehydration device for sewage sludge in the present invention when the repulsion filter-pressing is performed;
FIG. 12 is a schematic view showing a state in which a filter pressing chamber of the electromagnetic force filter pressing dehydration device for sewage sludge of the present invention is opened.
As shown in the figure, 1, a high-pressure mud inlet pipe, 2, a plunger pump, 3, a pneumatic ball valve, 4, a rack support, 5, a rack, 6, an electromagnetic core, 7, an electromagnetic coil, 8, an air inlet branch pipe, 9, a middle main filter pressing plate, 10, a middle auxiliary filter pressing plate, 11, a connecting block, 12, a hose, 13, a limit rod, 14, a latch mechanism, 14-1, a limit electromagnetic core, 14-2, a limit coil, 14-3, a spring baffle, 14-4, a return spring, 14-5, a slide block, 14-6, a limit slide rail, 15, a dust removing device, 16, a clamping slide tooth, 17, a clamping slide rail, 18, a slide tooth return spring, 19, a slide tooth driving electromagnet, 20, a tail plate, 21, a seal ring, 22, a filter plate support lug, 23, a reinforcing liner, 24, a filter cloth, 25, a main support plate frame, 26, a drain branch pipe, 27, a control bus, 28, a head plate, 29, a system controller, 30, a filter plate boss, 31 and a limit rope.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention. In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details. Furthermore, the drawings of the present invention are not necessarily to scale, nor are they necessarily drawn to scale.
As shown in the figure, the electromagnetic force filter pressing dehydration device for sewage sludge comprises a plurality of filter pressing chambers, each filter pressing chamber comprises a middle main filter plate 9 and a middle auxiliary filter plate 10, electromagnetic modules are arranged on the middle main filter plate 9 and the middle auxiliary filter plate 10, and the middle main filter plate 9 and the middle auxiliary filter plate 10 in the same filter pressing chamber are mutually attracted through the electromagnetic modules; the adjacent filter pressing chambers are communicated through a hose 12, and the hose 12 is communicated with a high-pressure mud inlet pipe; a limit rope 31 for limiting the maximum displacement of the two filter plates is arranged between the two adjacent filter plates; each electromagnetic module comprises an electromagnetic iron core 6 and an electromagnetic coil 7, and the electromagnetic coil 7 is wound on the corresponding electromagnetic iron core 6. The high-pressure mud inlet pipe 1 is arranged at a sewage and sludge feed inlet of the device, the opening and the closing of the high-pressure mud inlet pipe 1 are controlled through the pneumatic ball valve 3, the high-pressure mud inlet pipe is provided with the plunger pump 2, the plunger pump 2 is used as a mud inlet pump, the feed pressure is 1.5-2.0MPa, and the high-pressure feed pressure of the plunger pump 2 can be used for carrying out primary feed pressure dehydration on sludge.
The electromagnetic filter pressing dehydration device further comprises a head plate 28 and a tail plate 20, wherein the head plate 28 is positioned at the front end of the first filter pressing chamber, a through hole for the high-pressure mud inlet pipe 1 to penetrate is formed in the head plate 28, and the tail plate 20 is positioned at the rear end of the last filter pressing chamber.
The middle main filter pressing plate 9 is provided with a main filter pressing plate supporting plate frame 25, two sides of the middle auxiliary filter pressing plate 10, the main filter pressing plate supporting plate frame 25, a head plate 28 and a tail plate 20 are respectively provided with a boss, the boss of the main filter pressing plate supporting plate frame 25 is provided with a limiting rod 13 provided with a clamping groove, the middle auxiliary filter pressing plate 10 is provided with a bolt mechanism 14, and when limiting, a sliding block of the bolt mechanism 14 is inserted into the clamping groove of the limiting rod 13.
The electromagnetic filter pressing dewatering device further comprises a rack support 4, a rack 5 and a clamping mechanism, wherein the rack support 4 is vertically fixed on the head plate 28, the rack 5 is fixed on the rack support and is parallel to the filter pressing direction, the tail end of the rack 5 is fixed on a frame, the clamping mechanism is installed on the tail plate 20, and the rack 5 is clamped through the clamping mechanism in a clamping state, and at the moment, the tail plate can only move unidirectionally towards the head plate 28. The press direction generally refers to the direction of axial movement of the press chamber in the horizontal direction.
The clamping mechanism comprises clamping sliding teeth 16, clamping sliding rails 17, sliding tooth reset springs 18 and sliding tooth driving electromagnets 19, the clamping sliding teeth 16 are matched with the racks 5 and slide in the clamping sliding rails 17, the sliding tooth reset springs 18 are sleeved on the clamping sliding teeth 16, and the state switching of the separation and clamping of the clamping sliding teeth 16 and the racks 5 is realized through the switching of the power on and the power off of the sliding tooth driving electromagnets 19.
The latch mechanism 14 comprises a limiting block electromagnetic iron core 14-1, a limiting block coil 14-2, a spring baffle 14-3, a return spring 14-4, a sliding block 14-5 and a limiting slide rail 14-6, wherein the limiting block electromagnetic iron core 14-1 is fixed on the limiting slide rail 14-6, the limiting block coil 14-2 is wound on the limiting block electromagnetic iron core 14-1, the sliding block 14-5 is arranged in the limiting slide rail 14-6 and is connected with the return spring 14-4, and meanwhile, the limiting block electromagnetic iron core 14-1 and the limiting block coil 14-2 generate magnetic attraction to the sliding block 14-5 in an electrified state.
The latch mechanism 14 further comprises a spring baffle 14-3, one side of the spring baffle 14-3 abuts against the electromagnetic iron core 14-1, the other end of the spring baffle is connected with the return spring 14-4, and the other end of the return spring is connected with the sliding block 14-5.
The outer ring of the middle main filter pressing plate 9 is provided with a semicircular groove for installing a sealing ring 21, the diameter of the sealing ring 21 is smaller than that of the outer ring of the middle main filter pressing plate, the middle main filter pressing plate 9 and the middle auxiliary filter pressing plate 10 are provided with a reinforcing liner 23 and a filter cloth 24 from inside to outside, and the middle auxiliary filter pressing plate 10, the middle main filter pressing plate 9, the middle sealing ring 21, the reinforcing liner 23 and the filter cloth 24 form a filter pressing chamber with variable volume.
The upper parts of the middle main filter pressing plate 9 and the middle auxiliary filter pressing plate 10 are respectively provided with a high-pressure air inlet hole, and are communicated with the corresponding air inlet branch pipe 8, and high-pressure air can enter the filter pressing cavity through the high-pressure air pump, the air inlet main pipe, the air inlet branch pipe 8 and the high-pressure air inlet holes; the lower ends of the middle main filter pressing plate 9 and the middle auxiliary filter pressing plate 10 are respectively provided with a liquid discharge through hole which is connected with a filter plate drainage branch pipe 26, and the drainage branch pipe 26 is communicated with a drainage main pipe.
The electromagnetic force between the middle main filter pressing plate 9 and the middle auxiliary filter pressing plate 10 in the filter pressing chambers can be switched between the repulsive force and the attractive force at will.
The better scheme of the filter-pressing plate structure is to make into a round shape, the sealing performance is better, special requirements can also be made into a square shape, the inserted bar mechanism 14 is fixed on the middle auxiliary filter-pressing plate 10, and the limit bars 13 are fixed on two sides of the main filter-plate supporting plate frame 25.
The middle main filter pressing plate 9 and the middle auxiliary filter pressing plate 10 are provided with annular grooves, the upper half parts of the annular grooves are communicated with the air inlet branch pipes 8, and the lower half parts of the annular grooves are communicated with the filter plate drain branch pipes 26, so that water obtained by filter pressing can flow to the filter plate drain branch pipes 26 and the flow rate of water is accelerated through high-pressure gas, and meanwhile, the water on the surface of a mud cake is blown out. The middle auxiliary filter press plate 10, the main filter press plate support plate frame 25, the head plate 28 and the tail plate 20 are provided with bosses, the bosses of the main filter press plate support plate frame 25 are provided with limiting rods 13, the bosses of the middle auxiliary filter press plate 10 can be convenient for the limiting rods 13 to contact with and be in close fit with the bosses, the reinforcing liners 23 are fixed on the filter plates, the filter cloth 24 wraps the reinforcing liners 23 on the filter plates, and mud inlet holes are formed in the central positions of the main filter press plate 9, the auxiliary filter press plate 10, the reinforcing liners 23 and the filter cloth 24, so that sludge can enter the next group of main filter press plate chambers from the mud inlet holes in sequence until all chambers are full of sludge. The boss of the middle auxiliary filter press plate 10 is replaced by a dovetail groove, and the limiting rod 13 is also in the shape of the dovetail groove, so that axial limiting can be realized by matching the boss with the dovetail groove.
The limiting block coil 14-2 is connected with the controller and receives a switch signal, the spring baffle 14-3 is fixed on the sliding rail 14-6, so that the restoring spring 14-4 has enough stress area, the restoring spring 14-4 is responsible for connecting the sliding block 14-5 and the sliding rail 14-6, the sliding block 14-5 and the sliding rail 14-6 are guaranteed to restore to the original positions after relative movement, the tail part of the sliding block 14-5 is made of magnetic substances, the sliding block 14-5 and the sliding rail 14-6 generate relative movement after the limiting block coil 14-2 is powered on, the restoring spring 14-4 is compressed at the same time, and the front end of the sliding block stretches out to clamp the limiting rod 13.
The hose 12 is communicated with adjacent filter pressing chambers and is arranged on a main filter pressing plate and an auxiliary filter pressing plate of the adjacent chambers, meanwhile, the head plate 28 and the tail plate 20 are also connected with the adjacent filter pressing plates through the hose, the condition that the distance between the plates is changed but all the chambers are still communicated when the filter pressing plates move is met, the electromagnetic iron core 6 and the electromagnetic coil 7 are arranged on the two filter plates connected with the hose, a plurality of pairs of the filter pressing plates can be realized, mutual attraction between the chambers and mutual repulsion outside the chambers can be realized, and the middle main filter pressing plate 9 and the middle auxiliary filter pressing plate 10 are connected through the limiting ropes 31, so that the hose cannot be broken when the filter plates move.
The upper ends of the middle main filter pressing plate 9 and the middle auxiliary filter pressing plate 10 are respectively provided with a high-pressure air inlet hole and connected with an air inlet branch pipe 8, the filter plates are provided with through holes, the high-pressure gas generator and components comprise a high-pressure air pump, the air inlet branch pipe 8 and an air inlet main pipe, the air inlet branch pipe 8 and a hose are connected to move along with the filter plates, high-pressure gas can enter the sludge filter pressing cavity through the high-pressure air pump, the air inlet main pipe, the air inlet branch pipe 8 and the through holes, the lower ends of the main filter pressing plate 9 and the auxiliary filter pressing plate 10 are respectively provided with a liquid discharge through hole connected with a filter plate drainage branch pipe 26, the drainage branch pipe 26 is connected with the drainage main pipe through the hose, and the tail end of the drainage main pipe is provided with an electromagnetic valve.
The filter plate support lugs 22 are fixed on the auxiliary filter press plate 10, the main filter plate support plate frame 25, the head plate 2 and the tail plate 20, and four support lugs 22 are arranged on each filter plate for fixing the filter plate on the frame.
The invention is also provided with a system controller 29 and a control bus 27 to realize automatic control of the system. The pneumatic ball valve 3 is connected with the system controller 29 to realize automatic opening and closing, and the electromagnetic coil 7, the sliding tooth driving electromagnet 19 and the limiting block coil 14-2 on each filter plate are connected with the system controller 29 through the control bus 27.
The water outlet valve is an electromagnetic water outlet valve and can be automatically controlled to be opened and closed. The sewage sludge dewatering and reducing device by means of electromagnetic force also comprises a dust removing device 15, the dust removing device 15 removes sludge dust brought by high-pressure gas through negative pressure, and the primary settling device can be a cloth bag, a cyclone separator or a combination of the cloth bag and the cyclone separator.
The working principle of the device is as follows:
the starting state is that all chambers are opened, at this time, a controller sends a command, the sliding teeth drive the electromagnet to electrically attract the clamping sliding teeth to separate from the rack, meanwhile, a small current is conducted to the electromagnetic coil, as long as electromagnetic force generated by the current can attract the main filter pressing plate and the auxiliary filter pressing plate together, after the electromagnetic force is attracted, the coil of the limiting device is electrified, the limiting sliding block stretches out of the limiting sliding rail to limit the moving distance of the limiting rod, then the pneumatic ball valve is started to open the plunger pump to inject slurry into each filter pressing chamber, the main filter pressing plate and the auxiliary filter pressing plate are moved towards two sides under the pressure of the slurry, the filter pressing chambers gradually become larger, the limiting sliding block is clamped with the limiting rod to fix the volume of the chambers, the relative positions between the main filter pressing plate and the auxiliary filter pressing plate are fixed, the size of the filter pressing chamber is the initial volume of the sludge, and the pneumatic ball valve is closed by turning off the plunger pump after the plunger pump is filtered for a certain time. Under the action of the feeding pressure, the pressure to which the sludge is subjected is between 1.5 and 2.0MPa, the sludge is continuously pumped in, moisture enters into 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, the filter pressing cavity is filled after a period of feeding dehydration, the sludge cannot enter, a pneumatic ball valve is closed, the feeding of the sludge is stopped, and the feeding dehydration in the first stage is finished.
The second stage of dehydration is prepared, then the sliding tooth driving electromagnet is powered off, the clamping sliding tooth is clamped on the rack to enable the rack to move unidirectionally, and meanwhile, the current of the electromagnetic coil is gradually increased to enable the pressure between the main filter press plate and the auxiliary filter press plate to be gradually increased. Each chamber presses sludge in the respective chamber by means of independent electromagnetic suction, high-pressure air is blown into each filter pressing chamber by a high-pressure air pump after the sludge is continuously pressed for a period of time, and residual water and water on the surface of a mud cake are blown out, so that the sludge is pressed and dehydrated in the second stage;
in preparation for the third stage dehydration, the clamping sliding teeth and the racks play roles, the clamping sliding teeth always move along with the tail plate to the direction of the head plate in the process of the previous filter pressing, the clamping sliding teeth only can move to the direction of the head plate, when the current direction of the electromagnetic coil on the filter plate is changed, attractive force is kept between filter pressing chambers, the force between electromagnets of adjacent filter pressing chambers is changed into repulsive force, the sludge in the filter pressing chambers can be subjected to larger extrusion force, pressure and repulsive force, and the repulsive force can only push the filter plate to shrink the filter pressing chambers due to the existence of the clamping sliding teeth, so that the repulsive force acts greatly, and further the sludge is squeezed and dehydrated.
The controller controls the high-pressure air pump to work again, high-pressure air enters the high-pressure air inlet holes and the through holes on the filter plate through the air inlet branch pipes to blow back the filter cloth tightly attached to the reinforcing lining, the high-pressure air blows away mud cakes tightly attached to the filter cloth, meanwhile, mud particles attached to the filter cloth are blown away, the filter cloth is cleaned, and the high-pressure air also takes away a certain amount of moisture in the mud; in addition, when the mechanical squeezing is carried out, high-pressure gas enters, more water which is difficult to be removed by the mechanical squeezing in the sludge is carried out in a water vapor mode, and when the water outlet valve almost does not have water outlet, the squeezing is stopped, and the whole dehydration process is finished.
The mud discharging stage is entered, the inserted bar device is powered off after the filter pressing is completed, the inserted bar device is retracted into the limiting sliding rail through the limiting sliding block of the reset spring, the sliding tooth driving electromagnet is electrified to attract the clamping sliding tooth downwards to separate from the rack, then the tail plate can be away from the head plate, the current direction of each electromagnet between the filter plates is correspondingly changed to change the magnetic pole direction of each electromagnet, attractive force between filter pressing chambers is changed into repulsive force, force between electromagnets between adjacent filter pressing chambers is changed into attractive force, the filter pressing chambers are opened, mud falls into a conveying mechanism below the device from a gap between the filter plates to be conveyed out, and in the process, high-pressure gas is kept to blow in so that mud blocks fall off from the chambers and residual water and water on the surface of mud cakes are blown out until the mud discharging is completed. In order to prevent their distance from being too great to affect the next attraction when the chamber is opened, the distance is limited by a flexible cord (one implementation of a limit cord). Until the operation of this cycle is completed, each mechanism returns to the initial state again, ready for entering the next cycle, and the cycle operation is repeated.
The foregoing is illustrative of the preferred embodiments of the present invention, 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 that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (6)
1. The electromagnetic force filter pressing dehydration device for sewage sludge comprises a plurality of filter pressing chambers, wherein each filter pressing chamber comprises a middle main filter pressing plate (9) and a middle auxiliary filter pressing plate (10), electromagnetic modules are arranged on the middle main filter pressing plate (9) and the middle auxiliary filter pressing plate (10), and the middle main filter pressing plate (9) and the middle auxiliary filter pressing plate (10) in the same filter pressing chamber are mutually attracted through the electromagnetic modules; the adjacent filter pressing chambers are communicated through a hose (12), and the hose (12) is communicated with a mud inlet pipe; a limit rope (31) for limiting the maximum displacement of the two filter plates is arranged between the two adjacent filter plates; each electromagnetic module comprises an electromagnetic iron core (6) and an electromagnetic coil (7), and the electromagnetic coil (7) is wound on the corresponding electromagnetic iron core (6);
the electromagnetic force between the middle main filter pressing plate (9) and the middle auxiliary filter pressing plate (10) in the filter pressing chambers can be switched between the repulsive force and the attractive force at will;
the electromagnetic force filter pressing dehydration device further comprises a head plate (28) and a tail plate (20), wherein the head plate (28) is positioned at the front end of a first filter pressing chamber, a through hole for the mud inlet pipe (1) to penetrate is formed in the head plate (28), and the tail plate (20) is positioned at the rear end of a last filter pressing chamber;
a main filter plate supporting plate frame (25) is arranged on the middle main filter press plate (9), bosses are arranged on two sides of the middle auxiliary filter press plate (10), the main filter press plate supporting plate frame (25), a head plate (28) and a tail plate (20), a limiting rod (13) with a clamping groove is arranged on the boss of the main filter press plate supporting plate frame (25), a bolt mechanism (14) is arranged on the middle auxiliary filter press plate (10), and when limiting, a sliding block of the bolt mechanism (14) is inserted into the clamping groove of the limiting rod (13);
the plug pin mechanism (14) comprises a limiting block electromagnetic iron core (14-1), a limiting block coil (14-2), a spring baffle (14-3), a reset spring (14-4), a sliding block (14-5) and a limiting slide rail (14-6), wherein the limiting block electromagnetic iron core (14-1) is fixed on the limiting slide rail (14-6), the limiting block coil (14-2) is wound on the limiting block electromagnetic iron core (14-1), the sliding block (14-5) is arranged in the limiting slide rail (14-6) and is connected with the reset spring (14-4), and meanwhile, the limiting block electromagnetic iron core (14-1) and the limiting block coil (14-2) generate magnetic attraction to the sliding block (14-5) in an electrified state; the tail part of the sliding block (14-5) is a magnetic substance, when the limiting block coil (14-2) is powered on, the sliding block (14-5) and the limiting slide rail (14-6) move relatively, meanwhile, the reset spring (14-4) is compressed, and the front end of the sliding block stretches out to clamp the limiting rod (13).
2. The electromagnetic force filter pressing dehydration device of sewage sludge according to claim 1, wherein: the electromagnetic force filter-pressing dewatering device also comprises a rack support (4), a rack (5) and a clamping mechanism, wherein the rack support (4) is vertically fixed on the head plate (28), the rack (5) is fixed on the rack support and parallel to the filter-pressing direction, the tail end of the rack (5) is fixed on the frame, the clamping mechanism is arranged on the tail plate (20), and the rack (5) is clamped through the clamping mechanism in a clamping state, and at the moment, the tail plate can only move unidirectionally towards the head plate (28).
3. The electromagnetic force filter pressing dehydration device of sewage sludge according to claim 2, wherein: the clamping mechanism comprises clamping sliding teeth (16), clamping sliding rails (17), sliding tooth reset springs (18) and sliding tooth driving electromagnets (19), the clamping sliding teeth (16) are matched with the racks (5) and slide in the clamping sliding rails (17), the sliding tooth reset springs (18) are sleeved on the clamping sliding teeth (16), and through switching on and off of the sliding tooth driving electromagnets (19), the state switching of the separation and clamping of the clamping sliding teeth (16) and the racks (5) is achieved.
4. The electromagnetic force filter pressing dehydration device of sewage sludge according to claim 1, wherein: the latch mechanism (14) further comprises a spring baffle plate (14-3), one side of the spring baffle plate (14-3) abuts against the limiting block electromagnetic iron core (14-1), the other end of the spring baffle plate is connected with the return spring (14-4), and the other end of the return spring is connected with the sliding block (14-5).
5. The electromagnetic force filter pressing dehydration device of sewage sludge according to claim 1, wherein: the outer ring of middle main filter-pressing board (9) open and to have semicircle recess and be used for installing sealing washer (21), sealing washer (21) diameter than middle main filter-pressing board external diameter little, be equipped with on middle main filter-pressing board (9) and the middle auxiliary filter-pressing board (10) from inside to outside and be equipped with enhancement lining (23) and filter cloth (24), middle auxiliary filter-pressing board (10), middle main filter-pressing board (9), sealing washer (21), enhancement lining (23) and filter cloth (24) constitute a changeable filter-pressing cavity of volume.
6. The electromagnetic force filter pressing dehydration device of sewage sludge according to claim 1, wherein: the upper parts of the middle main filter pressing plate (9) and the middle auxiliary filter pressing plate (10) are respectively provided with a high-pressure air inlet hole, and are communicated with corresponding air inlet branch pipes (8), and high-pressure air can enter a filter pressing cavity through a high-pressure air pump, an air inlet main pipe, the air inlet branch pipes (8) and the high-pressure air inlet holes; the lower ends of the middle main filter pressing plate (9) and the middle auxiliary filter pressing plate (10) are respectively provided with a liquid discharge through hole which is connected with a filter plate drainage branch pipe (26), and the drainage branch pipe (26) is communicated with a drainage main pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2017104106009 | 2017-06-03 | ||
| CN201710410600 | 2017-06-03 |
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| CN107998707A CN107998707A (en) | 2018-05-08 |
| CN107998707B true CN107998707B (en) | 2023-08-15 |
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| CN201810091869.XA Expired - Fee Related CN108558163B (en) | 2017-06-03 | 2018-01-31 | Electromagnetic force filter-pressing dehydration method for sewage sludge |
| CN201820159552.0U Expired - Fee Related CN208711143U (en) | 2017-06-03 | 2018-01-31 | A kind of sewage sludge electromagnetic force filter-press dehydration device |
| CN201810092339.7A Active CN107998707B (en) | 2017-06-03 | 2018-01-31 | Electromagnetic force filter pressing dewatering device for sewage and sludge |
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| CN201810091869.XA Expired - Fee Related CN108558163B (en) | 2017-06-03 | 2018-01-31 | Electromagnetic force filter-pressing dehydration method for sewage sludge |
| CN201820159552.0U Expired - Fee Related CN208711143U (en) | 2017-06-03 | 2018-01-31 | A kind of sewage sludge electromagnetic force filter-press dehydration device |
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| CN108558163B (en) * | 2017-06-03 | 2020-04-28 | 厦门科享源环境技术有限公司 | Electromagnetic force filter-pressing dehydration method for sewage sludge |
| CN108479146B (en) * | 2018-05-31 | 2023-12-22 | 苏州凯新分离科技有限公司 | Pipeline type sewage filtering device with electromagnet loading and unloading mechanism |
| CN109351005A (en) * | 2018-11-29 | 2019-02-19 | 杭州渗源环境科技有限公司 | A kind of plate and frame filter press |
| CN110104925A (en) * | 2019-06-11 | 2019-08-09 | 饶宾期 | Sludge dewatering and moisture content detecting method |
| CN110092561B (en) * | 2019-06-11 | 2023-09-08 | 深圳市浩瑞泰科技有限公司 | Sludge dewatering and water content detection device |
| CN111153545B (en) * | 2020-01-14 | 2022-07-05 | 中国石油天然气股份有限公司 | Electromagnetic separation treatment method for oil field measure waste liquid |
| CN112755623A (en) * | 2020-12-31 | 2021-05-07 | 陈张萍 | Rotary dewatering type solid-liquid separation filter pressing device |
| CN112851074A (en) * | 2020-12-31 | 2021-05-28 | 第一环保（深圳）股份有限公司 | Production method of sludge dewatering and drying integrated equipment by utilizing magneto-thermal diaphragm airflow |
| CN113384944B (en) * | 2021-06-30 | 2022-08-19 | 山东凤鸣桓宇环保有限公司 | Sewage filtering environmental protection equipment based on magnetic control filter screen deformation |
| CN113975864A (en) * | 2021-12-04 | 2022-01-28 | 浙江艺乡环保科技有限公司 | Filter pressing assembly and filter press |
| CN114702223B (en) * | 2022-06-02 | 2022-08-09 | 山东祥龙新材料股份有限公司 | Sludge dewatering treatment device |
| CN115259605A (en) * | 2022-08-12 | 2022-11-01 | 李能军 | Sludge press filtration system for sewage treatment |
| CN115650550A (en) * | 2022-12-28 | 2023-01-31 | 邱县神龙印染有限责任公司 | Filter press for treating sewage generated in corduroy production and treatment process |
| CN117361833B (en) * | 2023-12-07 | 2024-02-13 | 潍坊山水环保机械制造有限公司 | Sewage treatment device |
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| CN108558163B (en) | 2020-04-28 |
| CN208711143U (en) | 2019-04-09 |
| CN107998707A (en) | 2018-05-08 |
| CN108558163A (en) | 2018-09-21 |
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