Belt type dehydrator with sludge discharging device

Abstract

The utility model discloses a belt type dehydrator with a sludge discharging device, which comprises a rack, and the sludge discharging device is arranged on the outer wall surface of one end of the rack and comprises a support, a sludge discharging device and a sludge discharging device, the upper unloading roller is rotatably arranged at the upper end of the support; the lower unloading roller is rotatably arranged at the lower end of the support and is opposite to the upper unloading roller; the upper scraper is mounted on the upper knife rest and faces the upper filter cloth; the lower scraper is mounted on the lower knife rest and faces the lower filter cloth; the forcing device is installed on the support and used for applying acting force to the upper knife rest and the lower knife rest so that the upper scraper and the lower scraper on the upper knife rest and the lower knife rest can be close to the upper filter cloth and the lower filter cloth respectively. By arranging the forcing device, the contact degree between the upper and lower scrapers and the upper and lower filter cloth is adjusted, the sludge scraping effect of the sludge unloading device is improved, meanwhile, the forcing device is constructed by adopting a lever principle or a spring, the upper and lower scrapers can be effectively prevented from scraping the upper and lower filter cloth, the structure is simple, and the practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment technology, specifically to a belt dewatering machine with a sludge unloading device. Background Technology

[0002] Sludge dewatering is the last step in the general wastewater treatment process. The efficiency of sludge dewatering and the moisture content of the dewatered sludge cake not only have a significant impact on the entire wastewater treatment process and the smooth operation of the wastewater treatment plant, but also often directly affect the economic benefits of the wastewater treatment plant.

[0003] Deep dewatering of sludge is a popular sludge dewatering process with significant social and economic benefits. Methods for deep sludge dewatering include applying absolute high pressure to the dewatering equipment to squeeze water out of the sludge, and adding chemicals to the sludge beforehand to fully release the water before pressing it out. Some methods also include a drying process to further dry the sludge cake. Commonly used sludge dewatering equipment includes horizontal plate and frame filter presses, screw presses, belt dewatering machines, and centrifugal dewatering machines. While these are undoubtedly mature dewatering devices with their own advantages, they still have some drawbacks, such as high energy consumption, high cost, large footprint, and high operating and maintenance costs.

[0004] A belt sludge dewatering machine is a device used to treat sludge, commonly found in wastewater treatment plants, chemical plants, paper mills, and other similar locations. During operation, the material is dispersed and stirred by the feeding mechanism before falling onto the filter belt, filter cloth, or filter screen. After dewatering, the material is scraped off by a scraper and discharged. For example, Chinese utility model patent CN211921283U discloses a belt dewatering machine with a sludge treatment device, comprising a pressure plate, a cleaning mechanism, a fixing plate, a brush body, and scrapers. While it can remove sludge residue from the filter screen, the scraper is manually operated by a handle, moving along the filter screen surface to scrape off the sludge and remove it via the brush body. This requires manual operation and is relatively labor-intensive. Furthermore, the scraper is fixed by the fixing plate, resulting in a rigid contact between the scraper and the filter screen surface. The degree of contact between the scraper and the filter screen cannot be adjusted, potentially leading to damage to the filter cloth or the filter screen surface and / or the scraper itself. Existing technologies also offer solutions for adjusting the contact level between the scraper and the filter screen, such as using a spring to press against the scraper to achieve elastic contact between the scraper and the filter screen. However, this structure suffers from poor scraping force, resulting in inadequate cleaning performance. Therefore, this invention was developed. Utility Model Content

[0005] In view of at least one of the above-mentioned technical problems, the purpose of this utility model is to provide a belt dewatering machine with a sludge unloading device.

[0006] The technical solution of this utility model is:

[0007] The purpose of this utility model is to provide a belt dewatering machine with a sludge unloading device. The belt dewatering machine includes a frame, an upper filter cloth, and a lower filter cloth. The sludge unloading device is disposed on the outer wall of one end of the frame and includes:

[0008] Supports, which are fixed to the frame;

[0009] An upper discharge roller is rotatably disposed at the upper end of the support, and the upper filter cloth passes around the upper discharge roller and extends upward;

[0010] The lower discharge roller is rotatably disposed at the lower end of the support and opposite to the upper discharge roller, and the lower filter cloth passes around the lower discharge roller and extends downward;

[0011] The upper scraper is mounted on an upper blade holder rotatably connected at one end to the support and facing the upper filter cloth on the upper discharge roller;

[0012] The lower scraper is mounted on a lower blade holder rotatably connected at one end to the support and faces the lower filter cloth on the lower discharge roller;

[0013] A force-applying device, which is mounted on the support and is used to apply a force to the upper and lower blade holders, causing the upper and lower scrapers on them to move closer to the upper and lower filter cloths, respectively.

[0014] Preferably, the force-applying device includes:

[0015] A lever is horizontally arranged between the upper and lower unloading rollers and rotatably connected to an outwardly protruding support plate in the middle of the support. The distance from one end of the lever to its fulcrum is different from the distance from the other end to its fulcrum.

[0016] The upper pull rod has one end rotatably connected to the upper tool holder and the other end rotatably connected to the lever on one side of the rotation fulcrum, and its length is extendable;

[0017] The pull rod has one end rotatably connected to the lower tool holder and the other end rotatably connected to the lever on the other side of the rotation fulcrum, and its length is extendable;

[0018] A counterweight is movably mounted on the lever and locked onto the lever when the lever is in a horizontal equilibrium state. The counterweight is located on the end of the lever that is farther from the pivot point.

[0019] Preferably, the upper pull rod is rotatably connected to the lever on the side with a longer end distance from the fulcrum, and the lower pull rod is rotatably connected to the lever on the side with a shorter end distance from the fulcrum.

[0020] Preferably, the counterweight has a through hole for the lever to pass through, and the top and / or bottom of the counterweight has a threaded hole that extends through the through hole. A fastening screw is threaded into the threaded hole, and the inner end of the fastening screw is adapted to press against the outer surface of the lever when the lever is in a horizontal equilibrium state to lock the counterweight on the lever.

[0021] Preferably, the force-applying device includes:

[0022] A support plate is horizontally arranged between the upper unloading roller and the lower unloading roller and is fixedly connected to the support.

[0023] The upper force-applying component includes an upper force-applying spring connected at one end to the support plate and an upper connecting rod connected at one end to the other end of the upper force-applying spring and rotatably connected at the other end to the other end of the upper blade holder, and applies a biasing force toward the upper filter cloth to the upper blade holder and the upper scraper.

[0024] The lower force-applying component includes a lower force-applying spring connected at one end to the support plate and a lower connecting rod connected at one end to the other end of the lower force-applying spring and rotatably connected at the other end to the other end of the lower blade holder, and applies a biasing force toward the lower filter cloth to the lower blade holder and the lower scraper.

[0025] Preferably, both the upper and lower force-applying springs are tension springs or torsion springs.

[0026] Preferably, the upper scraper is detachably connected to the upper blade holder; the lower scraper is detachably connected to the lower blade holder.

[0027] Preferably, an upper blade holder is provided on the side of the upper blade holder facing the upper unloading roller, and the upper scraper is detachably connected to the upper blade holder by fasteners consisting of screws and nuts;

[0028] A lower blade holder is provided on the side of the lower blade holder facing the lower unloading roller, and the lower scraper is detachably connected to the lower blade holder by fasteners consisting of screws and nuts.

[0029] Compared with the prior art, the advantages of this utility model are:

[0030] This utility model discloses a belt dewatering machine with a sludge unloading device. By setting up a force-adding device, the contact degree between the upper and lower scrapers and the upper and lower filter cloths is adjusted, thereby improving the sludge scraping effect of the sludge unloading device. At the same time, the force-adding device is constructed using the lever principle or spring, which can effectively protect the upper and lower scrapers from scratching the upper and lower filter cloths. The structure is simple and highly practical. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Figure 1 This is a structural schematic diagram of a force-adding device structure of the sludge unloading device according to an embodiment of the present utility model;

[0033] Figure 2 for Figure 1 The schematic diagram of the sludge unloading device in the image omits the support, upper unloading roller, and lower unloading roller.

[0034] Figure 3 This is a schematic diagram of another force-adding device structure of the sludge unloading device according to an embodiment of the present utility model.

[0035] The components are as follows: 11. Support; 12. Upper discharge roller; 13. Lower discharge roller; 14. Upper knife holder; 15. Lower knife holder; 16. Upper scraper; 161. Upper knife holder; 162. First fastener; 17. Lower scraper; 171. Lower knife holder; 172. Second fastener; 18a. Force-applying device; 181a. Lever; 182a. Upper pull rod; 183a. Lower pull rod; 184a. Counterweight; 185a. Fastening screw; 18b. Force-applying device; 181b. Upper force-applying spring; 182b. Lower force-applying spring; 183b. Upper connecting rod; 184b. Lower connecting rod; 19. Support plate; 20. Frame; 30. Upper filter cloth; 40. Lower filter cloth. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0037] See Figures 1 to 3 This utility model discloses a belt dewatering machine with a sludge discharge device. The belt dewatering machine includes a frame 20, an upper filter cloth 30, a lower filter cloth 40, several guide rollers, and the sludge discharge device of this embodiment. The sludge discharge device is mounted on the frame 20 and located on one end of the outer wall of the frame 20, specifically at one end of the sludge discharge section of the upper filter cloth 30 and the lower filter cloth 40 (exemplary). Figure 1 Only part of the frame 20 and the sludge unloading device are shown in the image, and Figure 1The sludge unloading device is located at the left end of the frame 20. The frame 20 is a cuboid frame structure assembled from multiple crossbeams and longitudinal beams; its specific details are not described or limited, and it is not the inventive point of this utility model. The upper filter cloth 30 and lower filter cloth 40 are conventional filter cloth, filter screen, or filter belt structures used in existing belt dewatering machines; they are not the inventive point of this utility model, and will not be described or limited here, as those skilled in the art will readily understand. Specifically, the sludge unloading device of this utility model includes a support 11, an upper unloading roller 12, a lower unloading roller 13, an upper scraper 16, a lower scraper 17, an upper blade holder 14, a lower blade holder 15, and a force-applying device.

[0038] Among them, such as Figure 1 and Figure 3 As shown, the support 11 is a roughly square plate structure, which can be welded and fixed to the frame 20, or fixed to the frame 20 by fasteners such as screws. In this embodiment of the present invention, two supports 11 are spaced apart at the left end of the frame 20. An upper unloading roller 12 and a lower unloading roller 13 are arranged vertically and horizontally between the two supports 11 and rotate at intervals. The upper filter cloth 30 extends to the upper right after passing over the upper unloading roller 12, and the lower filter cloth 40 extends to the lower right after passing over the lower unloading roller 13. The upper scraper 16 is installed on the upper side of the upper unloading roller 12 and faces the upper filter cloth 30 on the upper unloading roller 12. More specifically, an upper blade holder 14 is provided on the upper left side above the support 11. The upper scraper 16 is detachably installed on the upper blade holder 14 at the end facing the upper filter cloth 30, i.e., the lower end. One end of the upper blade holder 14 is rotatably connected to the support 11, and the other end extends downward to the left side of the support 11. Similarly, a lower blade holder 15 is provided on the lower left side of the support 11. The lower scraper 17 is detachably installed on the upper end of the lower blade holder 15 facing the lower filter cloth 40. One end of the lower blade holder 15 is rotatably connected to the support 11, and the other end extends upward and to the left of the support 11. A force-applying device is installed on the support 11 and is used to apply force to the upper scraper 16 and the lower scraper 17, so that the upper scraper 16 tends to approach the upper filter cloth 30 on the upper discharge roller 12 and the lower scraper 17 tends to approach the lower filter cloth 40 on the lower discharge roller 13, thereby improving the contact degree between the upper and lower scrapers 17 and the upper and lower filter cloths 40 and thus improving the sludge scraping effect.

[0039] For the force-applying device 18a, in one embodiment, such as Figure 1 and Figure 2 As shown, it includes a lever 181a horizontally arranged between the upper discharge roller 12 and the lower discharge roller 13, an upper pull rod 182a, a lower pull rod 183a, and a counterweight 184a. One end of the lever 181a is specifically as follows... Figure 1 The left end is rotatably connected to the outer end of the support 11, as shown. Figure 1On the horizontally arranged support plate 19 at the left end shown, the pivot point of lever 181a is taken as the pivot point. The two sides of the pivot point of lever 181a have different lengths, with one end being longer ( Figure 2 The middle is the right end), and the other end is short ( Figure 2 The left end is the middle one, meaning the distance from the left end of lever 181a to the fulcrum is shorter, while the distance from the right end of lever 181a to the fulcrum is longer. The upper pull rod 182a is rotatably connected to lever 181a on one side of the fulcrum (where the middle end is the left end). Figure 2 (The middle is on the right), the pull rod 183a is rotatably connected to the lever 181a on the other side of the pivot point ( Figure 2 (The middle is the left side). The counterweight 184a is movably mounted on the lever 181a and located at the end farthest from the pivot point, i.e., as shown. Figure 2 The right end is shown. For example, a counterweight 184a is movably inserted through the right end of the lever 181a, and the counterweight 184a is locked to the lever 181a by a fastening screw 185a when the lever 181a is in a horizontally balanced state. For instance, rotating the fastening screw 185a causes it to abut against the lever 181a, thus fixing the position of the counterweight 184a; or rotating the fastening screw 185a removes it from abutting against the lever 181a, allowing the counterweight 184a to move freely on the lever 181a, thereby adjusting the force applied by the force-applying device 18b18a. The counterweight 184a adjusts the applied force while maintaining the horizontal balance of the lever 181a. Alternatively, the counterweight 184a may have a horizontal through-hole (not shown) at its top and / or bottom. Figure 2The lever 181a (exemplarily the top) has a threaded hole extending downwards to the through hole, and a fastening screw 185a is threaded into this threaded hole. By tightening the fastening screw 185a, its inner end, i.e., the lower end, presses against the surface of the lever 181a passing through the through hole, thereby locking the counterweight 184a at a certain position on the lever 181a to prevent the counterweight 184a from sliding and losing balance, which would affect the mud-removing effect of the upper and lower scrapers 17. In this embodiment of the present invention, both the upper pull rod 182a and the lower pull rod 183a are telescopically adjustable pull rods, for example, both are telescopically adjustable sleeve rods connected by two sleeves. The other end of the upper pull rod 182a is rotatably connected to the upper blade holder 14, and the other end of the lower pull rod 183a is rotatably connected to the lower blade holder 15. In this embodiment of the invention, the force-applying device 18a utilizes the lever principle 181a. Adjustable length pull rods of the upper and lower blade holders 15 are connected to the levers 181a on both sides of the fulcrum. A movable counterweight 184a acts as the force of the lever 181a, simultaneously applying force to the upper and lower scrapers 17. By moving the distance between the counterweight 184a and the fulcrum, the upper and lower scrapers 17 achieve optimal shoveling and cutting force, resulting in the best shoveling effect. In use, the contact degree between the upper and lower scrapers 17 and the upper and lower filter cloths 40 can be adjusted according to the thickness and hardness of the mud cake on the upper and lower filter cloths 40. The position of the counterweight 184a on the lever 181a can be adjusted accordingly. After the position is determined, the counterweight 184a can be locked with the fastening screw 185a. As an alternative embodiment, the upper pull rod 182a can also be rotatably connected to the left side of the rotation fulcrum of the lever 181a, while the lower connecting rod 184b can be rotatably connected to the right side of the rotation fulcrum of the lever 181a.

[0040] As an alternative embodiment of the force-applying device, such as Figure 3As shown, the force-applying device 18b includes an upper force-applying component and a lower force-applying component. The upper force-applying component includes an upper force-applying spring 181b and an upper connecting rod 183b, and the lower force-applying component includes a lower force-applying spring 182b and a lower connecting rod 184b. The upper force-applying spring 181b and the lower force-applying spring 182b are arranged vertically opposite each other. A horizontally arranged support plate 19 is also provided on the support 11 between the upper unloading roller 12 and the lower unloading roller 13 (in the previous embodiment of the force-applying device 18a, this support plate 19 is also provided, and the support plate 19 is rotatably connected to the lever 181a of the force-applying device 18a; in this embodiment, the support plate 19 is connected to the upper force-applying spring 181b and the lower force-applying spring 182b). The upper end of the upper connecting rod 183b is rotatably connected to the upper knife holder 14, and the lower end of the upper connecting rod 183b is connected to the upper end of the upper force-applying spring 181b. Next, the lower end of the upper force spring 181b is connected to the support plate 19. Similarly, the lower end of the lower connecting rod 184b is rotatably connected to one end of the lower blade holder 15. The upper end of the lower connecting rod 184b is connected to the lower end of the lower force spring 182b. The upper end of the lower force spring 182b is connected to the support plate 19. The upper force spring 181b applies a biasing force to the upper blade holder 14, causing the upper scraper 16 on the upper blade holder 14 to approach the upper filter cloth 30 on the upper discharge roller 12. The lower force spring 182b applies a biasing force to the lower blade holder 15, causing the lower scraper 17 on the lower blade holder 15 to approach the lower filter cloth 40 on the lower discharge roller 13. In this embodiment, the upper force spring 181b and the lower force spring 182b apply biasing forces to the upper blade holder 14 and the lower blade holder 15 respectively, thereby elastically adjusting the contact degree between the upper scraper 16 and the lower scraper 17 and the upper filter cloth 30 and the lower filter cloth 40 respectively, improving the sludge scraping effect. The upper force spring 181b and the lower force spring 182b can be selected from conventional tension springs or torsion springs available on the market.

[0041] In a preferred embodiment of the sludge unloading device of this utility model, both the upper scraper 16 and the lower scraper 17 are detachably fixed to facilitate replacement. For example, as shown... Figure 2 As shown, on the side of the upper tool holder 14 facing the upward unloading roller 12, that is... Figure 2 The lower part of the diagram shows an upper blade holder 161, to which the upper scraper 16 is detachably connected via a fastener consisting of a screw and nut (for clarity, this fastener is described as the first fastener 162). Similarly, the side of the lower blade holder 15 facing the downward-facing unloading roller 13 is also... Figure 2 The diagram shows a lower blade holder 171, and a lower scraper 17 is detachably connected to the lower blade holder 171 by a fastener consisting of a screw and nut (for clarity, the fastener is described here as the first fastener 172). Figure 2As shown, the upper tool holder 161 and the lower tool holder 171 are approximately L-shaped structures. Both the upper tool holder 161 and the lower tool holder 162 have insertion holes (not shown) for the upper scraper 16 and the lower scraper 17 to be inserted and fixed, respectively, and these insertion holes extend into the upper tool holder 14 and the lower tool holder 15.

[0042] The sludge unloading device of this utility model improves the sludge scraping effect by adjusting the contact degree between the upper and lower scrapers 17 and the upper and lower filter cloths 40 through the setting of the force-applying device. At the same time, the force-applying device using the lever 181a principle or spring can effectively protect the upper and lower scrapers 17 from scraping the upper and lower filter cloths 40. The structure is simple and highly practical.

[0043] Other structures of the belt dewatering machine, such as mechanisms for achieving alignment, tensioning, sludge unloading, and cleaning, are not described or limited and are not the inventive points of this utility model.

[0044] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A belt dewatering machine with a sludge unloading device, the belt dewatering machine comprising a frame, an upper filter cloth, and a lower filter cloth, characterized in that, The sludge unloading device is disposed on the outer wall of one end of the frame and includes: Supports, which are fixed to the frame; An upper discharge roller is rotatably disposed at the upper end of the support, and the upper filter cloth passes around the upper discharge roller and extends upward; The lower discharge roller is rotatably disposed at the lower end of the support and opposite to the upper discharge roller, and the lower filter cloth passes around the lower discharge roller and extends downward; The upper scraper is mounted on an upper blade holder rotatably connected at one end to the support and facing the upper filter cloth on the upper discharge roller; The lower scraper is mounted on a lower blade holder rotatably connected at one end to the support and faces the lower filter cloth on the lower discharge roller; A force-applying device, which is mounted on the support and is used to apply a force to the upper and lower blade holders, causing the upper and lower scrapers on them to move closer to the upper and lower filter cloths, respectively.

2. The belt dewatering machine according to claim 1, characterized in that, The force-applying device includes: A lever is horizontally arranged between the upper and lower unloading rollers and rotatably connected to an outwardly protruding support plate in the middle of the support. The distance from one end of the lever to its fulcrum is different from the distance from the other end to its fulcrum. The upper pull rod has one end rotatably connected to the upper tool holder and the other end rotatably connected to the lever on one side of the rotation fulcrum, and its length is extendable; The pull rod has one end rotatably connected to the lower tool holder and the other end rotatably connected to the lever on the other side of the rotation fulcrum, and its length is extendable; A counterweight is movably mounted on the lever and locked onto the lever when the lever is in a horizontal equilibrium state. The counterweight is located on the end of the lever that is farther from the pivot point.

3. The belt dewatering machine according to claim 2, characterized in that, The upper pull rod is rotatably connected to the lever on the side with the longer end distance from the fulcrum, and the lower pull rod is rotatably connected to the lever on the side with the shorter end distance from the fulcrum.

4. The belt dewatering machine according to claim 2 or 3, characterized in that, The counterweight has a through hole for the lever to pass through, and the top and / or bottom of the counterweight has a threaded hole that extends through the through hole. A fastening screw is threaded into the threaded hole, and the inner end of the fastening screw is adapted to press against the outer surface of the lever when the lever is in a horizontal equilibrium state to lock the counterweight on the lever.

5. The belt dewatering machine according to claim 1, characterized in that, The force-applying device includes: A support plate is horizontally arranged between the upper unloading roller and the lower unloading roller and is fixedly connected to the support. The upper force-applying component includes an upper force-applying spring connected at one end to the support plate and an upper connecting rod connected at one end to the other end of the upper force-applying spring and rotatably connected at the other end to the other end of the upper blade holder, and applies a biasing force toward the upper filter cloth to the upper blade holder and the upper scraper. The lower force-applying component includes a lower force-applying spring connected at one end to the support plate and a lower connecting rod connected at one end to the other end of the lower force-applying spring and rotatably connected at the other end to the other end of the lower blade holder, and applies a biasing force toward the lower filter cloth to the lower blade holder and the lower scraper.

6. The belt dewatering machine according to claim 5, characterized in that, Both the upper and lower force-adding springs are tension springs or torsion springs.

7. The belt dewatering machine according to claim 1, 2, or 6, characterized in that, The upper scraper is detachably connected to the upper blade holder; the lower scraper is detachably connected to the lower blade holder.

8. The belt dewatering machine according to claim 7, characterized in that, An upper blade holder is provided on the side of the upper blade holder facing the upper unloading roller, and the upper scraper is detachably connected to the upper blade holder by fasteners consisting of screws and nuts; A lower blade holder is provided on the side of the lower blade holder facing the lower unloading roller, and the lower scraper is detachably connected to the lower blade holder by fasteners consisting of screws and nuts.

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