Multi-stage squeezing and filtering device for deep dehydration of sludge

Abstract

The utility model belongs to the technical field of deep dehydration of sludge, and particularly relates to a multistage squeezing and filtering device for deep dehydration of sludge, which comprises a belt filter press and a squeezing and filtering frame mounted at one end of the belt filter press, a water spraying frame is mounted on the surface of the belt filter press, a driving motor is mounted on the outer side of the belt filter press, and the driving motor is connected with the squeezing and filtering frame. The butt joint block at the top end of the supporting rod is assembled at the opening of the fixing base, at the moment, the movable rod is pulled, the linkage plate is driven to extrude the linkage spring, the movable rod is loosened, and then the butt joint block is assembled at the opening of the fixing base. At the moment, a locking buckle is embedded into a locking groove in one side of a butt-joint block, so that the butt-joint block can be quickly disassembled, assembled and stabilized conveniently, and at the moment, in the long-term operation process of the multi-stage squeezing and filtering device for deep dehydration of the sludge, if the cutting edge of the scraping plate is abraded and cracked, quick replacement is realized, and the effect of scraping a sludge filter cake is improved.

Description

Multi-stage press filtration device for deep dewatering of sludge Technical Field

[0001] This utility model belongs to the field of sludge deep dewatering technology, specifically relating to a multi-stage pressing and filtering device for sludge deep dewatering. Background Technology

[0002] The multi-stage pressing and filtration device is the pretreatment stage, where concentrated sludge is mixed with a polymer flocculant to cause fine particles to aggregate into clumps. Then, in the gravity dewatering stage, the sludge is added to the filter belt, and free water passes through the filter belt under gravity. Next is the wedge-shaped pre-compression dewatering stage, where the gap between the filter belts gradually narrows, applying compression and shearing forces to the sludge for further dewatering. Finally, in the pressing dewatering stage, the sludge undergoes repeated compression and shearing by the pressing roller system, removing a large amount of capillary water to form a sludge filter cake, which is scraped off by the discharge scraper.

[0003] In the long-term operation of multi-stage pressing filtration devices for deep sludge dewatering, the discharge scraper, as a key component for achieving efficient sludge removal, needs to continuously generate mechanical friction with the filter belt or filter plate surface to complete the filter cake removal operation. Due to the complex composition of sludge, often containing hard impurities such as sand and fibers, and the significantly increased hardness and adhesion of dewatered sludge, the cutting edge of the discharge scraper is prone to wear and cracking under high-frequency, high-intensity scraping, resulting in a significantly shortened service life and a significantly increased replacement frequency. However, currently available multi-stage pressing filtration devices mostly use traditional bolting or welding methods to install and fix the side discharge scrapers. This structural design has many drawbacks: bolting makes operation extremely inconvenient due to the limited installation space, requiring various specialized tools for disassembly and assembly, consuming a lot of time and manpower; welded scrapers are difficult to replace quickly, requiring cutting or other methods to damage the original structure, which not only increases equipment maintenance costs but also causes potential damage to the device itself. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-stage pressing and filtering device for deep sludge dewatering. This addresses the problem that in existing multi-stage pressing and filtering devices on the market, the side discharge scrapers are mostly installed and fixed using traditional bolting or welding methods. This design has several drawbacks: bolting makes operation extremely inconvenient due to the limited installation space, requiring various specialized tools and consuming significant time and manpower for disassembly and assembly; welded scrapers are difficult to replace quickly, necessitating cutting or other methods to damage the original structure, increasing equipment maintenance costs and potentially damaging the device itself.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage pressing and filtering device for deep dewatering of sludge, comprising a belt filter press and a pressing and filtering frame installed at one end of the belt filter press, wherein a water spray frame is installed on the surface of the belt filter press, a drive motor is installed on the outside of the belt filter press, a shaft is connected to the output end of the drive motor, and a filter belt is connected to the surface of the shaft.

[0006] The belt filter press is connected to a fixed base on its outer side. A support rod is connected to the bottom end of the fixed base. A side rod is connected to one side of the support rod. A scraper is connected to the other end of the side rod. A docking block is connected to the end of the support rod near the fixed base. A movable rod is connected through one side of the fixed base. A linkage plate is connected to one end of the movable rod. A linkage spring is connected to one side of the linkage plate. A locking buckle is connected to the other side of the linkage plate.

[0007] As a preferred embodiment of the multi-stage pressing and filtering device for deep dewatering of sludge of this utility model, the scraper is made of stainless steel, the top of the scraper contacts the edge of the filter belt, and the support rod is connected to the fixed seat through a connecting block.

[0008] In a preferred embodiment of the multi-stage pressing and filtering device for deep dewatering of sludge according to this utility model, one end of the linkage spring relative to the linkage plate is connected to the inner wall of the fixed base, and the linkage spring and the linkage plate form an elastic telescopic structure.

[0009] As a preferred embodiment of the multi-stage pressing and filtering device for deep dewatering of sludge of this utility model, the connecting block has a locking groove on the side near the locking buckle, and the locking buckle and the locking groove on one side of the connecting block form an interlocking structure.

[0010] As a preferred embodiment of the multi-stage pressing and filtering device for deep dewatering of sludge of this utility model, the surface of the belt filter press is connected to a fixed plate, a screw is threaded through the surface of the fixed plate, the other end of the screw is connected to a receiving block, and a limit plate is connected to one side of the receiving block.

[0011] In a preferred embodiment of the multi-stage pressing and filtering device for deep dewatering of sludge according to this utility model, the surface opening size of the limiting plate is adapted to the surface size of the filter belt, a rotating block is connected to the end of the lead screw near the receiving block, and a guide rod is connected to the end of the limiting plate near the lead screw.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention assembles the connecting block at the top of the support rod at the opening of the fixed base. Pulling the movable rod causes the linkage plate to compress the linkage spring, simultaneously moving the locking buckle. When the scraper is stably installed, the movable rod is released, and the locking buckle is engaged in the locking groove on one side of the connecting block, facilitating quick and stable assembly and disassembly of the connecting block. During the long-term operation of the multi-stage pressing filter device for deep sludge dewatering, if the scraper blade wears or cracks, it can be quickly replaced, improving the scraping effect on the sludge filter cake. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 is a schematic diagram of the overall structure of the multi-stage pressing and filtering device of this utility model;

[0016] Figure 2 is a schematic diagram of the scraper installation structure of this utility model;

[0017] Figure 3 is a schematic diagram of the locking buckle connection structure of this utility model;

[0018] Figure 4 is a schematic diagram of the limiting plate structure of this utility model;

[0019] Figure 5 is a schematic diagram of the guide rod connection structure of this utility model.

[0020] In the diagram: 1. Belt filter press; 2. Pressing and filtering frame; 3. Spray frame; 4. Drive motor; 5. Shaft; 6. Filter belt; 7. Fixed base; 8. Support rod; 9. Side rod; 10. Scraper; 11. Connecting block; 12. Movable rod; 13. Linkage plate; 14. Linkage spring; 15. Locking buckle; 16. Fixed plate; 17. Screw; 18. Receiving block; 19. Limiting plate; 20. Rotating block; 21. Guide rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please refer to Figures 1-5. This utility model provides the following technical solution: a multi-stage pressing and filtering device for deep dewatering of sludge, including a belt filter press 1 and a pressing and filtering frame 2 installed at one end of the belt filter press 1. The sludge is pressed by rollers between the pressing and filtering frames 2. A water spray frame 3 is installed on the surface of the belt filter press 1. A drive motor 4 is installed on the outside of the belt filter press 1. A shaft 5 is connected to the output end of the drive motor 4. A filter belt 6 is connected to the surface of the shaft 5.

[0023] A fixed base 7 is connected to the outside of the belt filter press 1. A support rod 8 is connected to the bottom of the fixed base 7. A side rod 9 is connected to one side of the support rod 8. A scraper 10 is connected to the other end of the side rod 9. A docking block 11 is connected to the end of the support rod 8 near the fixed base 7. A movable rod 12 is connected through one side of the fixed base 7. A linkage plate 13 is connected to one end of the movable rod 12. A linkage spring 14 is connected to one side of the linkage plate 13. A locking buckle 15 is connected to the other side of the linkage plate 13.

[0024] Preferably, the scraper 10 is made of stainless steel, and the top of the scraper 10 contacts the edge of the filter belt 6. The support rod 8 is connected to the fixed seat 7 through the docking block 11.

[0025] In practical use, the scraper 10 is easily assembled by connecting the docking block 11 with the fixing seat 7.

[0026] Preferably, one end of the linkage spring 14 relative to the linkage plate 13 is connected to the inner wall of the fixed base 7, and the linkage spring 14 and the linkage plate 13 form an elastic telescopic structure.

[0027] In practical use, the elastic telescopic structure between the linkage spring 14 and the linkage plate 13 facilitates the automatic locking of the scraper 10.

[0028] Preferably, the mating block 11 has a locking groove on the side near the locking buckle 15, and the locking buckle 15 and the locking groove on one side of the mating block 11 form a fitting structure.

[0029] In practical use, the locking buckle 15 is fitted into the locking groove on one side of the docking block 11, which facilitates the quick and stable disassembly and assembly of the scraper 10.

[0030] Preferably, a fixing plate 16 is connected to the surface of the belt filter press 1, a screw 17 is threaded through the surface of the fixing plate 16, a receiving block 18 is connected to the other end of the screw 17, and a limiting plate 19 is connected to one side of the receiving block 18.

[0031] In practical use, by rotating the lead screw 17, the threaded connection between the lead screw 17 and the fixed plate 16 drives the limit plate 19 to adjust its position.

[0032] Preferably, the surface opening size of the limiting plate 19 is adapted to the surface size of the filter belt 6, the end of the lead screw 17 near the receiving block 18 is connected to a rotating block 20, and the end of the limiting plate 19 near the lead screw 17 is connected to a guide rod 21.

[0033] In practical use, the movement of the guide rod 21 ensures the stable movement of the limit plate 19, thereby guaranteeing the stability of the filter belt 6 and preventing deviations.

[0034] The working principle of this utility model is as follows: The connecting block 11 at the top of the support rod 8 is assembled at the opening of the fixed base 7. At this time, pulling the movable rod 12 causes the linkage plate 13 to compress the linkage spring 14, simultaneously causing the locking buckle 15 to move synchronously. When the scraper 10 is stably installed, the movable rod 12 is released, and the locking buckle 15 is then engaged in the locking groove on one side of the connecting block 11, thus facilitating quick and stable assembly and disassembly of the connecting block 11. This is applicable during the long-term operation of the multi-stage pressing and filtering device for deep sludge dewatering. If the blade of scraper 10 is worn or cracked, it can be quickly replaced, improving the scraping effect on the sludge filter cake. In addition, by rotating the lead screw 17 on the surface of the fixed plate 16, the rotating block 20 at one end of the lead screw 17 rotates along the opening on one side of the receiving block 18. At this time, the limiting plate 19 is driven to limit the filter belt 6, and the guide rod 21 is driven to slide along the fixed plate 16, thereby ensuring that the limiting plate 19 limits the movement of the filter belt 6, thus ensuring that the filter belt 6 is not deviated during the sludge dewatering process.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage pressing and filtering device for deep dewatering of sludge, comprising a belt filter press (1) and a pressing and filtering frame (2) installed at one end of the belt filter press (1), characterized in that: The belt filter press (1) is equipped with a water spray frame (3) on its surface. A drive motor (4) is installed on the outside of the belt filter press (1). The output end of the drive motor (4) is connected to a shaft (5). A filter belt (6) is connected to the surface of the shaft (5). A fixed seat (7) is connected to the outside of the belt filter press (1). A support rod (8) is connected to the bottom end of the fixed seat (7). A side rod (9) is connected to one side of the support rod (8). A scraper (10) is connected to the other end of the side rod (9). A docking block (11) is connected to the end of the support rod (8) near the fixed seat (7). A movable rod (12) is connected through one side of the fixed seat (7). A linkage plate (13) is connected to one end of the movable rod (12). A linkage spring (14) is connected to one side of the linkage plate (13). A locking buckle (15) is connected to the other side of the linkage plate (13).

2. The multi-stage pressing and filtering device for deep dewatering of sludge according to claim 1, characterized in that: The scraper (10) is made of stainless steel. The top of the scraper (10) contacts the edge of the filter belt (6). The support rod (8) is connected to the fixed seat (7) through the docking block (11).

3. The multi-stage pressing and filtering device for deep dewatering of sludge according to claim 1, characterized in that: One end of the linkage spring (14) relative to the linkage plate (13) is connected to the inner wall of the fixed seat (7), and the linkage spring (14) and the linkage plate (13) form an elastic telescopic structure.

4. The multi-stage pressing and filtering device for deep dewatering of sludge according to claim 1, characterized in that: The docking block (11) has a locking groove on the side near the locking buckle (15), and the locking buckle (15) and the locking groove on the side of the docking block (11) form a fitting structure.

5. The multi-stage pressing and filtering device for deep dewatering of sludge according to claim 1, characterized in that: The belt filter press (1) is connected to a fixing plate (16) on its surface. A screw rod (17) is threaded through the surface of the fixing plate (16). The other end of the screw rod (17) is connected to a receiving block (18). A limit plate (19) is connected to one side of the receiving block (18).

6. The multi-stage pressing and filtering device for deep dewatering of sludge according to claim 5, characterized in that: The surface opening size of the limiting plate (19) is adapted to the surface size of the filter belt (6). The end of the lead screw (17) near the receiving block (18) is connected to a rotating block (20), and the end of the limiting plate (19) near the lead screw (17) is connected to a guide rod (21).

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