Double-layer material distribution vertical belt filter press

Abstract

A double-layer cloth vertical belt filter press comprises a rack unit, a filter pressing unit, a driving unit and a scraping device, the filter pressing unit comprises a hydraulic system, a bottom pressure bearing platform, a top pressure applying platform, an oil cylinder, a lower layer filter belt, an upper layer filter belt and a middle layer filter belt, and the bottom pressure bearing platform is fixed on the rack unit; a cylinder end flange of the oil cylinder is connected to a top cross beam of the bottom pressure-bearing platform, a rod end flange of the oil cylinder is connected to the upper surface of the top pressure-applying platform, the lower-layer filter belt, the upper-layer filter belt and the middle-layer filter belt are arranged between the bottom pressure-bearing platform and the top pressure-applying platform, the cloth is divided into upper-layer cloth and bottom-layer cloth, the upper-layer cloth is located between the middle-layer filter belt and the upper-layer filter belt, and the lower-layer cloth is located between the bottom-layer cloth and the middle-layer filter belt. The bottom-layer cloth is positioned between the lower-layer filter belt and the middle-layer filter belt; according to the utility model, a plurality of groups of oil cylinders are added to apply pressure, the dehydration pressure and the pressure maintaining time can be accurately controlled so as to achieve an expected effect, and the oil cylinders vertically apply pressure to the filter belt, so that tearing and stretching force cannot be generated on the filter belt.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection equipment, and in particular to a double-layer cloth vertical belt filter press. Background Technology

[0002] A filter press is a mechanical device that uses a special filter medium (filter cloth) to apply pressure to the object being pressed, causing the liquid to seep out. It is a commonly used solid-liquid separation device. Filter presses are generally divided into five categories: plate and frame filter presses, box filter presses, vertical filter presses, belt filter presses, and diaphragm filter presses. Among them, belt filter presses mainly consist of a drive unit, frame, press rollers, upper filter belt, lower filter belt, filter belt tensioning device, unloading device, and electrical control system. Currently, the dewatering process of belt filter presses on the market is roughly divided into a chemical pretreatment dewatering section, a gravity concentration dewatering section, a wedge zone pre-compression dewatering section, and a high-pressure dewatering section using squeeze rollers.

[0003] Currently, ordinary belt filter presses on the market rely solely on the tension provided by the upper and lower tensioned filter cloths to squeeze and dewater the material. For municipal sludge, the dewatering rate can only reach about 80%, making it difficult to further remove moisture from the material. Moreover, the filter cloth of the belt filter press can only withstand a limited amount of tension. Excessive tension will reduce the service life of the filter cloth, and in severe cases, it may cause the filter cloth to tear, leading to a sudden shutdown of the equipment. This reduces the filtration effect and adaptability of the belt filter press.

[0004] The prior art, patent announcement number CN114159865A, discloses a tracked high-pressure dewatering machine, which includes an upper tracked filter press assembly, a lower tracked filter press assembly, a mesh belt, a lower mesh belt, a winding pre-dewatering roller, an upper tensioning roller assembly, a lower tensioning roller assembly, an upper correction roller, a lower correction roller, an upper discharge roller, a lower discharge roller, a mesh belt side sealing chain, and a front sealing device. Two annular tracks closely adhere to the upper and lower mesh belts, forming a wedge-shaped filter press area between the two mesh belts. The height of the filter press area gradually decreases from the feed end to the discharge end, thereby providing the material with a gradually increasing and continuous filtration pressure. The height and angle of the wedge-shaped filter chamber filter press area are adjustable. However, since the material cannot be absolutely uniform, if the minimum wedge gap is adjusted too small, it will cause local compression to be too tight, resulting in motor overload or damage to the tracks; if the minimum wedge gap is adjusted too large, the dewatering effect will be poor. This equipment does not have the function of maintaining pressure for dewatering, and therefore cannot achieve the requirement of deep dewatering. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the defect of the existing technology that does not have the function of maintaining pressure for dewatering, and therefore cannot achieve the requirement of deep dewatering, and to provide a double-layer cloth vertical belt filter press.

[0006] The technical solution adopted by this utility model to solve its technical problem is a double-layer cloth vertical belt filter press, which includes a frame unit, a filter pressing unit, a drive unit and a scraping device, wherein the filter pressing unit, the drive unit and the scraping device are all installed on the frame unit;

[0007] The filter press unit includes a hydraulic system, a bottom pressure-bearing platform, a top pressure-applying platform, a cylinder, a lower filter belt, an upper filter belt, and a middle filter belt. The bottom pressure-bearing platform, the top pressure-applying platform, and the cylinder are arranged sequentially from bottom to top. The bottom pressure-bearing platform is fixed on the frame unit. The cylinder end flange of the cylinder is connected to the top crossbeam of the bottom pressure-bearing platform, and the rod end flange of the cylinder is connected to the upper surface of the top pressure-applying platform. The lower filter belt, the upper filter belt, and the middle filter belt are arranged between the bottom pressure-bearing platform and the top pressure-applying platform. The filter material is divided into an upper layer filter material and a bottom layer filter material. The upper layer filter material is located between the middle filter belt and the upper filter belt, and the bottom layer filter material is located between the lower filter belt and the middle filter belt.

[0008] The drive unit includes a motor and a drive roller assembly. The drive roller assembly is driven by the motor and drives the lower filter belt, upper filter belt and middle filter belt to run.

[0009] Furthermore, the hydraulic cylinders are vertically arranged with multiple filter belts, and the multiple hydraulic cylinders are arranged in two rows.

[0010] Furthermore, the upper filter belt is located inside the closed loop formed by the middle filter belt, the upper material is located on the inner surface of the middle filter belt, and the bottom material is located on the outer surface of the lower filter belt.

[0011] Furthermore, the drive unit also includes a filter belt tensioning and correction assembly and an idler roller assembly. The lower filter belt, upper filter belt, and middle filter belt bypass the drive roller assembly, the filter belt tensioning and correction assembly, and the idler roller assembly to achieve the driving, tensioning, and correction of the filter belt.

[0012] This utility model has the following beneficial technical effects:

[0013] Compared with the existing extrusion roller dewatering technology, this utility model adds multiple sets of hydraulic cylinders to apply pressure, which can accurately control the dewatering pressure and holding time to achieve the expected effect. Moreover, the hydraulic cylinders apply pressure vertically to the filter belt, which will not tear or stretch the filter belt, thus greatly improving the service life of the filter belt. The specially designed double-layer fabric method can increase the equipment's production capacity many times over without significantly increasing the equipment cost. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a double-layer fabric vertical belt filter press according to this utility model;

[0015] Figure 2This is a schematic diagram of the filter press unit of an embodiment of a double-layer cloth vertical belt filter press according to this utility model;

[0016] Figure 3 This is a side view of the filter press unit and material in an embodiment of a double-layer cloth vertical belt filter press according to this utility model;

[0017] Figure 4 This is a schematic diagram of the filter press unit of an embodiment of a double-layer cloth vertical belt filter press according to this utility model;

[0018] Figure 5 This is a side view of an embodiment of a double-layer fabric vertical belt filter press according to this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Frame unit; 2. Filter press unit; 21. Bottom pressure platform; 22. Top pressure platform; 23. Hydraulic cylinder; 24. Lower filter belt; 25. Upper filter belt; 26. Middle filter belt; 3. Drive unit; 31. Drive roller assembly; 32. Filter belt tensioning and correction assembly; 33. Idler roller assembly; 4. Scraper device. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] Reference Figure 1 This embodiment includes a frame unit 1, a filter press unit 2, a drive unit 3, and a scraper device 4. The frame unit 1 is mainly made of steel sections, and the filter press unit 2, the drive unit 3, and the scraper device 4 are all mounted on the frame.

[0023] Reference Figure 2 and Figure 4 The filter press unit 2 includes a hydraulic system, a bottom pressure platform 21, a top pressure platform 22, a hydraulic cylinder 23, a lower filter belt 24, an upper filter belt 25, and a middle filter belt 26. The hydraulic system provides power to the hydraulic cylinder 23. Specifically, the bottom pressure platform 21, the top pressure platform 22, and the hydraulic cylinder 23 are arranged sequentially from bottom to top, and the bottom pressure platform 21 has a crossbeam that surrounds the top pressure platform 22 and the hydraulic cylinder 23. The bottom pressure platform 21 is fixed to the frame, the cylinder end flange of the hydraulic cylinder 23 is connected to the top crossbeam of the bottom pressure platform 21, and the rod end flange of the hydraulic cylinder 23 is connected to the upper surface of the top pressure platform 22.

[0024] Reference Figure 2 and Figure 4The lower filter belt 24, the upper filter belt 25, and the middle filter belt 26 are all closed loops. The upper filter belt 25 is located inside the closed loop formed by the middle filter belt 26, and the upper material is located on the inner surface of the middle filter belt 26. The fabric is divided into an upper fabric and a bottom fabric. The upper material is located on the inner surface of the middle filter belt 26, and the bottom material is located on the outer surface of the lower filter belt 24. That is, the upper fabric and the bottom fabric are sandwiched between the two filter belts.

[0025] In addition, the hydraulic cylinders 23 are vertically arranged and there are multiple cylinders 23, and the multiple hydraulic cylinders 23 are arranged in two rows.

[0026] Reference Figure 5 The drive unit 3 also includes a motor and drive roller assembly 31, a filter belt tensioning and correction assembly 32, and an idler roller assembly 33. Both ends of each drive roller, tension roller, and idler roller are fixed to the frame via bearing seats. The motor drives the drive roller assembly 31 to rotate and drive the lower filter belt 24, upper filter belt 25, and middle filter belt 26 to run. The three closed-loop filter belts pass around each drive roller, tension roller, and idler roller, and are tensioned by the tensioning device.

[0027] In addition, a scraping device 4 is provided on the cross-section of the discharge roller in the material dropping area to scrape off individual materials adhering to the surface of the filter belt.

[0028] The implementation principle of a double-layer fabric vertical belt filter press according to this utility model embodiment is as follows:

[0029] The hydraulic system controls the retraction of each cylinder 23, leaving sufficient gap between the bottom pressure platform 21 and the top pressure platform 22 to facilitate the conveying of materials and belts. Then, the three filter belts move forward synchronously under the drive of the drive rollers, and materials are fed synchronously in the feeding area. When the filter belts carry the materials to the appropriate position at the bottom of the filter pressing area, the filter belts stop moving forward. At this time, each cylinder 23 presses down, applying gradient pressure to the two layers of materials held by the filter belts for dewatering. After holding the pressure for the set time, each cylinder 23 retracts again. This cycle continues, realizing intermittent filter pressing, dewatering, and material discharge.

[0030] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A double cloth vertical belt filter press, characterized by, The filter press comprises a rack unit (1), a filter press unit (2), a driving unit (3) and a scraping device (4), wherein the filter press unit (2), the driving unit (3) and the scraping device (4) are all mounted on the rack unit (1); The filter press unit (2) comprises a hydraulic system, a bottom pressure bearing platform (21), a top pressure applying platform (22), an oil cylinder (23), a lower filter belt (24), an upper filter belt (25) and a middle filter belt (26), wherein the bottom pressure bearing platform (21), the top pressure applying platform (22) and the oil cylinder (23) are sequentially arranged from bottom to top, the bottom pressure bearing platform (21) is fixed on the rack unit (1), the cylinder flange of the oil cylinder (23) is connected to the top beam of the bottom pressure bearing platform (21), the rod flange of the oil cylinder (23) is connected to the upper surface of the top pressure applying platform (22), the lower filter belt (24), the upper filter belt (25) and the middle filter belt (26) are arranged between the bottom pressure bearing platform (21) and the top pressure applying platform (22), the material is divided into upper material and bottom material, the upper material is located between the middle filter belt (26) and the upper filter belt (25), and the bottom material is located between the lower filter belt (24) and the middle filter belt (26). The driving unit (3) comprises a motor and a driving roller assembly (31), wherein the driving roller assembly (31) is driven by the motor and drives the lower filter belt (24), the upper filter belt (25) and the middle filter belt (26) to run.

2. A double deck cloth vertical belt filter press according to claim 1, wherein, The oil cylinder (23) is vertically arranged and has a plurality of oil cylinders (23), and the plurality of oil cylinders (23) are arranged in two rows.

3. A double cloth vertical belt filter press according to claim 1, wherein, The upper filter belt (25) is located inside the closed loop formed by the middle filter belt (26), the upper material is located on the inner surface of the middle filter belt (26), and the bottom material is located on the outer surface of the lower filter belt (24).

4. A double cloth vertical belt filter press according to claim 1, wherein, The driving unit (3) further comprises a filter belt tensioning and deviation rectifying assembly (32) and a carrier roller assembly (33), wherein the lower filter belt (24), the upper filter belt (25) and the middle filter belt (26) pass through the driving roller assembly (31), the filter belt tensioning and deviation rectifying assembly (32) and the carrier roller assembly (33) to realize the driving, tensioning and deviation rectifying of the filter belt.

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