An ultra-high pressure sludge belt dewatering machine
By using ultra-high pressure sludge belt dewatering machine in the sludge drying process, using plate and frame system and ultra-high pressure hydraulic device, the problems of low dehydration efficiency and high cost in the existing technology are solved, and efficient sludge is achieved Dehydration and space saving effects.
Patent Information
- Application Number
- CN202110490814.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-05-06
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2041-05-06
AI Technical Summary
In the existing sludge drying process, the solid-liquid separation moisture content is high, and the dehydration efficiency of ordinary belt filter presses and plate and frame filter presses is low, the cost is high, and the space is large, so it cannot effectively improve the dehydration rate of the sludge.
An ultra-high pressure sludge belt dewatering machine is designed, using a plate and frame system and an ultra-high pressure hydraulic device. Through the synchronous rotation of three sets of filter plate groups and filter roller belts, it provides an ultra-high pressure of more than 10MPa to enhance the sludge. Compression ratio and dehydration rate, and set the backlash system to maintain the water permeability of the filter cloth.
The high dehydration rate of sludge is achieved, the sludge moisture content is reduced to 50%-60%, the working efficiency is improved, space and operating costs are saved, and the structure is simple and the site occupies small.
Smart Images
Figure CN113045170B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of sludge drying, and in particular to an ultra-high pressure sludge belt dewatering machine. Background Art
[0002] The conventional process for drying sludge is: the remaining sludge is dried by a belt filter press or a plate and frame filter press, collected by a conveyor belt, and then sent to the sludge dump.
[0003] The above treatment process has the problem of high water content in solid-liquid separation, the reasons are:
[0004] 1. After the sludge is dried by an ordinary belt filter press, the moisture content is usually around 80%. The extrusion and filtration pressure on the sludge is low, and the dehydration effect cannot be improved.
[0005] 2. Ordinary plate and frame filter presses and diaphragm plate and frame filter presses add sludge through a high-pressure pump. The moisture content of the sludge after filtration is usually greater than 65%. The moisture content of the sludge can be reduced to about 60% under the condition of adding lime, which increases the cost of sludge disposal. The sludge cannot be used as a fertilizer resource after adding lime.
[0006] 3. Plate and frame filter presses generally use a 2MPa high-pressure pump to add sludge, which has a long working time and high energy consumption. The secondary compression ratio of the diaphragm plate and frame filter press is small, which is a fatal disadvantage of sludge filtration and dehydration. It is produced in batches, has low working efficiency and occupies a large three-dimensional space. Summary of the invention
[0007] In order to solve the problems in the prior art, the patent of this invention designs an ultra-high pressure sludge belt dewatering machine, which performs ultra-high pressure filtration on the sludge and meets the sludge treatment process of continuous feeding at the same time. It has high working efficiency and ensures a high dehydration rate of the sludge.
[0008] The technical solution adopted by the present invention is: the dehydrator includes a frame, a plate frame system, a filter press system and a conveying system, the frame is a frame structure, the plate frame system is an upright plate frame structure composed of three plate frame frames, namely a first plate frame frame, a second plate frame frame and a third plate frame frame, the three plate frame frames are sequentially arranged in the frame, the outer side surfaces of the first plate frame frame and the third plate frame frame on both sides are respectively connected to the two sides of the frame through an ultra-high pressure hydraulic device, and the two sides of the second plate frame frame are respectively connected to the first plate frame frame and the third plate frame frame through telescopic components;
[0009] The filter press system is arranged in a plate-frame system, and includes three filter plate groups, namely, a first filter plate group, a second filter plate group and a third filter plate group. The three filter plate groups are correspondingly arranged in three plate-frame frames. A water receiving trough is arranged below each filter plate group. The filter plate group includes two filter rollers, a filter belt and a support frame. The two filter rollers are respectively fixed to the upper and lower ends of the plate-frame frame through bearings and are respectively connected to servo motors. The filter belt passes around the two filter rollers. The support frame is located on the inner side of the filter belt, and respectively presses against the two sides of the filter belt outwardly. The support frame is connected to the plate-frame frame through a connecting rod.
[0010] The conveying system comprises an upper conveying system, a lower conveying system and a driving roller group, the upper conveying system comprises an upper filter cloth and an upper tensioning roller group, the upper tensioning roller group is located on the upper side of the frame, the lower conveying system comprises a lower filter cloth and a lower tensioning roller group, the lower tensioning roller group is located on the lower side of the frame, the driving roller group is located on the lower side of the filter press system, and comprises an active roller and a driven roller, the active roller and the driven roller are connected by a synchronous chain, a mud inlet roller is arranged on the front side of the frame, and a mud outlet roller is arranged on the rear side, the upper filter cloth and the lower filter cloth overlap at the mud inlet roller, and together bypass the active roller downward, then pass upward between the first filter plate group and the second filter plate group, and then pass downward between the second filter plate group and the third filter plate group, bypass the driven roller and then move upward, and separate at the mud outlet roller. The sludge enters between the upper filter cloth and the lower filter cloth from the mud inlet roller, and enters the filter press system along with the filter cloth driven by the driving roller group. The plate and frame system presses the three groups of filter plates of the filter press system tightly together under the action of the ultra-high pressure hydraulic devices on both sides. In order to facilitate the passage of the filter cloth, the filter plate group is equipped with a filter roller to drive the filter belt to rotate. Driven by the filter belt, the filter cloth can smoothly pass through the filter press system under ultra-high pressure and fully squeeze out the water in the sludge, with a high compression ratio.
[0011] Furthermore, the dewatering machine is provided with a backwash system, which includes an upper backwash system located on the upper side of the frame and a lower backwash system located on the lower side of the frame, the upper filter cloth passes through the upper backwash system, and the lower filter cloth passes through the lower backwash system. The backwash system can wash the filter cloth after the sludge is removed, ensuring that the filter cloth can still maintain good water permeability during continuous operation.
[0012] Furthermore, the filter belt is evenly distributed with mesh holes and is provided with a vertical water flow channel. The two sides of the filter belt are respectively provided with evenly arranged belt holes. Both ends of the filter roller are respectively provided with synchronous gears. The belt holes on the two sides of the filter belt are respectively matched with the gear teeth of the synchronous gears. The belt holes on the two sides of the filter belt are sleeved on the gear teeth of the synchronous gears. The filter belt is connected to the synchronous gear of the filter roller through the belt holes on both sides, so that it can always keep rotating synchronously with the filter roller, providing sufficient power to assist the filter cloth to pass through the filter press system.
[0013] Furthermore, the support frame of the filter plate group includes two support plates, which are connected by a jack, and the two ends of the jack are respectively connected to the center of the two support plates. The jack is connected to the two sides of the plate frame through a connecting rod, and a row of pressure roller bearings are respectively embedded on the outer plate surface of the two support plates to support the filter belt. The jack pushes the support plate to both sides so that the support plate is in full contact with the filter belt to ensure sufficient squeezing force on the filter cloth passing through. The pressure roller bearings are embedded on the support plate to reduce the friction between the filter belt and the support plate during the movement of the filter belt.
[0014] Furthermore, a mud inlet hopper is provided on the upper side of the mud inlet roller at the front side of the frame, and a mud outlet hopper is connected to the lower side of the mud outlet roller at the rear side of the frame. The mud outlet hopper is provided with mud scrapers at the separation of the upper filter cloth and the lower filter cloth, respectively, and the two mud scrapers are respectively against the cloth surface of the upper filter cloth and the lower filter cloth. The mud scrapers scrape off the sludge that is pressed on the filter cloth after dehydration and falls into the mud outlet hopper.
[0015] Furthermore, the frame includes a left vertical plate bracket and a right vertical plate bracket, the two vertical plate brackets are connected by two cross beams, the two cross beams are respectively connected to the middle parts of both sides of the two vertical plate brackets, the left vertical plate bracket is connected to the first plate frame skeleton through an ultra-high pressure hydraulic device, and the right vertical plate bracket is connected to the third plate frame skeleton through an ultra-high pressure hydraulic device.
[0016] Furthermore, guide rails are respectively arranged on the two cross beams in the extension direction, and rollers are respectively arranged on the outside of the two sides of the three plate frame skeletons. The rollers on both sides are respectively located in the guide rails of the cross beams on both sides and can roll along the guide rails.
[0017] Furthermore, the same side ends of the three groups of water tanks are inclined downward at the same part and are commonly connected to the water collecting tank.
[0018] Compared with the prior art, the ultra-high pressure sludge belt dewatering machine designed by the patent of the present invention has the following advantages: the dewatering machine adopts a belt-type continuous feeding and discharging method, and is provided with a plate and frame system and a filter press system. An ultra-high pressure hydraulic device is provided to provide an ultra-high extrusion pressure for the filter press system, thereby improving the compression ratio of the sludge and the dehydration rate; the filter plate group of the filter press system is provided with a filter roller and a synchronously rotating filter belt, and the filter belt is in direct contact with the filter cloth wrapped with the sludge. The rotation of the filter belt can ensure that the filter cloth can still pass stably through the filter press system under the ultra-high pressure extrusion pressure; the filter plate group is provided with a support frame with a thousand-gold top on the inner side of the filter belt to support the belt body, and a pressure roller bearing is embedded on the outer surface of the support plate to reduce the friction between the filter belt and the support plate, so that the filter belt can rotate smoothly; the sludge belt dewatering machine designed by the present invention has a simple structure and a reasonable design, and the overall site occupation is small, space is saved, and operation and management costs are reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic diagram of the plane structure of the ultra-high pressure sludge belt dewatering machine.
[0020] Figure 2 This is a schematic diagram of the front view of the ultra-high pressure sludge belt dewatering machine.
[0021] Figure 3 This is a schematic diagram of the structure of the filter press system and the conveying system.
[0022] Figure 4 This is a schematic diagram of the structure of the filter plate group
[0023] Figure 5 This is a schematic diagram of the filter roller structure.
[0024] Figure 6 This is a side view of the filter roller.
[0025] Figure 7 This is a cross-sectional view of the filter belt.
[0026] In the figure, 1 frame, 2 plate frame system, 3 filter press system, 4 conveying system, 5 recoil system, 6 control system, 11 left vertical plate bracket, 12 right vertical plate bracket, 13 cross beam, 14 guide rail, 15 ultra-high pressure oil cylinder, 16 mud inlet bucket, 17 mud outlet bucket, 18 mud scraper, 21 first plate frame frame, 22 second plate frame frame, 23 third plate frame frame, 24 roller, 31 filter roller, 32 filter belt, 33 support plate, 34 Jack, 35 water tank, 311 synchronous gear, 321 belt hole, 322 mesh, 331 pressure roller bearing, 41 driving roller group, 42 upper conveying system, 43 lower conveying system, 44 mud inlet roller, 45 mud outlet roller, 411 active roller, 412 driven roller, 413 synchronous chain, 421 upper filter cloth, 422 tensioning roller group, 431 lower filter cloth, 432 lower tensioning roller group, 51 upper recoiler, 52 lower recoiler DETAILED DESCRIPTION
[0027] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention are clearly and completely described, and the described embodiments are only embodiments of a part of the present invention, not all of them. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0028] like Figure 1 , 2 As shown in Figure 3, the patent of the present invention designs an embodiment of an ultra-high pressure sludge belt dewatering machine, including a frame 1, a plate and frame system 2, a filter press system 3, a conveying system 4 and a backwash system 5.
[0029] The frame 1 is a frame structure, including a left vertical plate support 11 and a right vertical plate support 12. The two vertical plate supports are connected by two cross beams 13, and the two cross beams 13 are respectively connected to the middle of the two sides of the two vertical plate supports. The plate frame system 2 includes a vertical plate frame structure composed of three plate frame frames, namely a first plate frame frame 21, a second plate frame frame 22 and a third plate frame frame 23. The three plate frame frames are arranged in sequence from left to right in the frame 1. The outer sides of the first plate frame frame 21 and the third plate frame frame 23 on both sides are respectively connected to the left vertical plate support 11 and the right vertical plate support 12 on both sides of the frame 1 through an ultra-high pressure cylinder 15. The left and right sides of the second plate frame frame 22 are respectively connected to the first plate frame frame 21 and the third plate frame frame 23 through jacks. Guide rails 14 are respectively arranged on the two cross beams 13 of the frame 1 in the extending direction, and rollers 24 are respectively arranged in the middle of both sides of the three plate frame skeletons. The rollers 24 on both sides are respectively located in the guide rails 14 of the cross beams 13 on both sides and can roll along the guide rails 14.
[0030] The filter press system 3 is arranged in the plate and frame system 2, including three filter plate groups, namely the first filter plate group, the second filter plate group and the third filter plate group. The three filter plate groups are correspondingly arranged in the three plate frame skeletons, and a water receiving trough 35 is provided under each filter plate group. The same side ends of the three groups of water receiving troughs 35 are tilted downward together and connected to the water collecting trough.
[0031] Combination Figure 4 As shown, the filter plate group includes two filter rollers 31, a filter belt 32 and a support frame. The two filter rollers 31 are fixed to the upper and lower ends of the plate frame frame through bearings, and are respectively connected to servo motors. The filter belt 32 passes around the two filter rollers 31. The support frame is located on the inner side of the filter belt 32, and respectively presses against the two sides of the filter belt 32 outward. The support frame includes two support plates 33, which are connected by a jack 34. The two ends of the jack 34 are respectively connected to the center of the two support plates 33. The jack 34 is connected to the two sides of the plate frame frame through a connecting rod. A row of pressure roller bearings 331 are respectively embedded on the outer plate surfaces of the two support plates 33, and the filter belt 32 is supported by the pressure roller bearings 331.
[0032] Combination Figure 5 , 6 As shown in Figures 7 and 8, the filter belt 32 is evenly distributed with mesh holes 322 and is provided with a vertical water trough. The filter belt 32 is provided with evenly arranged belt holes 321 near both sides. Synchronous gears 311 are provided at both ends of the filter roller 31. The belt holes 321 on both sides of the filter belt 32 are matched with the synchronous gears 311 at both ends of the filter roller 31, and the belt holes 321 of the filter belt 32 are sleeved on the gear teeth of the synchronous gear 311. The filter belt 32 is connected to the synchronous gears 311 at both ends of the filter roller 31 through the belt holes 321 on both sides, so that it can always keep rotating synchronously with the filter roller 31.
[0033] The conveying system 4 includes an upper conveying system 42, a lower conveying system 43 and a driving roller group 41. The upper conveying system 42 includes an upper filter cloth 421 and an upper tensioning roller group 422. The upper filter cloth 421 bypasses the upper tensioning roller group 422. The upper tensioning roller group 422 includes two roller shafts and is located on the upper side of the frame 1. The lower conveying system 43 includes a lower filter cloth 431 and a lower tensioning roller group 432. The lower filter cloth 431 bypasses the lower tensioning roller group 432. The lower tensioning roller group 432 also includes two roller shafts and is located on the lower side of the frame 1. The driving roller group 41 is located on the lower side of the filter press system 3, including an active roller 411 and a driven roller 412. The active roller 411 is connected to a driving motor, and the active roller 411 and the driven roller 412 are connected by a synchronous chain 413. A mud inlet roller 44 is provided on the lower side of the mud inlet hopper 16 on the front side of the frame 1, and a mud outlet roller 45 is provided on the upper side of the mud outlet hopper on the rear side. The upper filter cloth 421 and the lower filter cloth 431 overlap at the mud inlet roller 44, and the two go around the active roller 411 downwards, then go upwards between the first filter plate group and the second filter plate group, then go downwards between the second filter plate group and the third filter plate group, go around the driven roller 412, and then go upwards, and separate at the mud outlet roller 45. The mud outlet hopper 17 is provided with a scraper plate 18 at the separation point of the upper filter cloth 421 and the lower filter cloth 431, and the two scrapers 18 are respectively against the cloth surface of the upper filter cloth 421 and the lower filter cloth 431, and the sludge adhered to the filter cloth due to extrusion after dehydration is scraped off and falls into the mud outlet hopper 17.
[0034] The recoil system 5 includes an upper recoiler 51 located on the upper side of the frame 1 and a lower recoiler 52 located on the lower side of the frame 1. The upper filter cloth 421 passes through the upper recoiler 51, and the lower filter cloth 431 passes through the lower recoiler 431. The recoiler can wash the filter cloth after the sludge is scraped off, ensuring that the filter cloth can still maintain good water permeability during continuous operation.
[0035] At the same time, the ultra-high pressure sludge belt dewatering machine of the present invention is equipped with a control system 6 to control various motors, recoilers, etc. in the dewatering machine.
[0036] After pre-concentration and high-pressure wall breaking, the sludge is dehydrated by an ultra-high-pressure sludge belt dehydrator to achieve continuous ultra-high-pressure dehydration and drying of the sludge under normal temperature. The specific steps are as follows:
[0037] 1. After the control system is started, the sludge is pre-concentrated and treated with high-pressure wall breaking through the sludge pump to the sludge inlet hopper of the ultra-high pressure sludge belt dewatering machine frame, and spread between the upper filter cloth and the lower filter cloth;
[0038] 2. The sludge enters the filter press system through the conveying system. The ultra-high pressure oil cylinder repeatedly applies a pressure of more than 10MPa to the sludge for squeezing. The filtrate seeps out from the mesh of the filter belt and is diverted to the water receiving trough, and the moisture content of the sludge is rapidly reduced;
[0039] 3. The filter plate of the filter press system supports and squeezes the sludge in the middle of the filter cloth. After multiple dehydration, the moisture content of the sludge is 50% to 60%;
[0040] 4. The control system realizes the transmission of the filter cloth conveyor belt through the drive system and filter roller, and automatically transports the sludge to the mud discharge hopper. At the same time, the upper and lower recoilers of the recoil system spray water with high pressure to flush the upper and lower filter cloths, which is beneficial to the continuous guarantee of sludge dehydration efficiency.
[0041] The above contents are only preferred embodiments of the present invention and cannot be used to limit the scope of implementation of the present invention. That is, any simple equivalent changes and modifications made according to the claims and description of the present invention are still within the scope of the present invention.
Claims
1. A sludge dewatering method using an ultra-high pressure sludge belt dewatering machine, characterized in that: The dehydrator comprises a frame, a plate-frame system, a filter press system and a conveying system, the frame being a frame structure, the plate-frame system being an upright plate-frame structure composed of three plate-frame skeletons, namely a first plate-frame skeleton, a second plate-frame skeleton and a third plate-frame skeleton, the three plate-frame skeletons being arranged in sequence in the frame, the outer sides of the first plate-frame skeleton and the third plate-frame skeleton on both sides being connected to the two sides of the frame respectively through an ultra-high pressure hydraulic device, and the two sides of the second plate-frame skeleton being connected to the first plate-frame skeleton and the third plate-frame skeleton respectively through a telescopic assembly; the filter press system is arranged in the plate-frame system, comprising three filter plate groups, namely a first filter plate group, a second filter plate group and a third filter plate group, the three filter plate groups are correspondingly arranged in the three plate-frame skeletons, a water receiving trough is provided under each filter plate group, the filter plate group comprises two filter rollers, a filter belt and a support frame, the two filter rollers are respectively fixed to the upper and lower ends of the plate-frame skeleton through bearings, and are respectively connected to servo motors. The upper filter cloth and the lower filter cloth are overlapped at the mud feed roller, and they pass through the active roller downwards together, and then pass upwards between the first filter plate group and the second filter plate group, and then pass downwards between the second filter plate group and the third filter plate group, and then pass upwards after passing through the driven roller, and separate at the mud discharge roller. The backwash system includes an upper backwash system located on the upper side of the frame and a lower backwash system located on the lower side of the frame. The upper filter cloth passes through the upper backwash system, and the lower filter cloth passes through the lower backwash system. The filter belt is evenly distributed with mesh holes and is provided with a vertical water flow channel. Both sides of the filter belt are respectively provided with evenly arranged belt holes. Both ends of the filter roller are respectively provided with synchronous gears. The belt holes on both sides of the filter belt are respectively matched with the gear teeth of the synchronous gears. The belt holes on both sides of the filter belt are sleeved on the gear teeth of the synchronous gears. The support frame of the filter plate group includes two support plates, which are connected by a jack. The two ends of the jack are respectively connected to the center of the two support plates. The jack is connected to the two sides of the plate frame through a connecting rod. A row of pressure roller bearings are respectively embedded on the outer plate surfaces of the two support plates to support the filter belt. The front side of the frame is provided with a mud inlet hopper on the upper side of the mud inlet roller, and the rear side of the frame is connected with a mud outlet hopper on the lower side of the mud outlet roller. The mud outlet hopper is provided with mud scraping plates at the separation of the upper filter cloth and the lower filter cloth, respectively. The two mud scraping plates are against the cloth surfaces of the upper filter cloth and the lower filter cloth, respectively. The frame includes a left vertical plate support and a right vertical plate support, the two vertical plate supports are connected by two cross beams, and the two cross beams are respectively connected to the middle of both sides of the two vertical plate supports, the left vertical plate support is connected to the first plate frame skeleton through an ultra-high pressure hydraulic device, and the right vertical plate support is connected to the third plate frame skeleton through an ultra-high pressure hydraulic device. Guide rails are arranged on the two beams in the extension direction, and rollers are arranged on the outside of the two sides of the three plate frame frames. The rollers on both sides are respectively located in the guide rails of the beams on both sides and can roll along the guide rails. The same side ends of the three groups of water tanks are tilted down synchronously and connected to the water collecting tank together. The specific steps of the sludge dewatering method are: (1) After the control system is started, the sludge is pre-concentrated and treated with high-pressure wall breaking through the sludge pump to the sludge inlet hopper of the ultra-high pressure sludge belt dewatering machine frame, and spread between the upper filter cloth and the lower filter cloth; (2) The sludge enters the filter press system through the conveying system. The ultra-high pressure oil cylinder repeatedly applies a pressure of more than 10MPa to the sludge for squeezing. The filtrate seeps out from the mesh of the filter belt and is diverted to the water receiving trough, and the moisture content of the sludge is rapidly reduced. (3) The filter plate of the filter press system supports and squeezes the sludge in the middle of the filter cloth. After multiple dehydration, the sludge moisture content is 50%~60%; (4) The control system realizes the transmission of the filter cloth conveyor belt through the drive system and filter roller, and automatically transports the sludge to the sludge discharge hopper. At the same time, the upper and lower recoilers of the recoil system spray water with high pressure to flush the upper and lower filter cloths, which is conducive to the continuous guarantee of sludge dewatering efficiency.