Cattle dung dewatering device and dewatering process

Abstract

The application provides a kind of cattle dung dehydration processing device and dehydration process applied to livestock and poultry manure resource treatment technical field, including rack, main compression roller, filter pressing mechanism, feeding and discharging mechanism, cleaning mechanism and collection tank;Filter pressing mechanism sets up outer filter pressing conveyor belt and inner filter pressing conveyor belt that are connected and run synchronously, and respectively sets up arc superposition part and parallel part;Feeding and discharging mechanism completes material conveying and finished product recovery with the winding part of conveyor belt, cleaning mechanism is used for washing filter belt and recovering residual material, and bottom collection tank concentrates filter pressing wastewater;The application forms airtight filter pressing space by outer filter pressing conveyor belt and inner filter pressing conveyor belt and cooperates with the tank body structure of lower compression tank and lower compression tank, effectively prevents material leakage and regulates packing thickness, and completes squeezing dehydration with main compression roller;The overall structure is compact, stable in operation, convenient to unload, significantly improves cattle dung dehydration quality and operation efficiency, and is suitable for large-scale manure solid-liquid separation operation.

Description

Technical Field

[0001] This application relates to the field of livestock and poultry manure resource utilization technology, and in particular to a cattle manure dewatering processing device and dewatering process. Background Technology

[0002] At present, double-layered belt filter press equipment is widely used in the solid-liquid dewatering treatment of cow manure. Conventional equipment relies solely on the double-layered belt to directly clamp loose cow manure for pressing.

[0003] This operating method lacks a dedicated enclosed containment chamber. The loose, highly mobile cow manure is prone to lateral overflow and leakage from the gaps on both sides of the filter belt during the feeding, conveying, and pressing stages. This not only wastes raw materials and pollutes the surrounding environment but also increases the burden of equipment cleaning. Furthermore, the unconstrained open feeding method makes it difficult to uniformly fill the material thickness, resulting in significant differences in the amount of cow manure packed in different areas of the filter belt. Under subsequent uniform pressure pressing, thinner areas are easily over-compressed, causing material breakage, while thicker areas are not thoroughly dehydrated, ultimately leading to a large difference in the dryness and wetness of the finished product and poor overall dehydration uniformity.

[0004] Therefore, a cow dung dehydration processing device and dehydration process are proposed to solve the above problems. Summary of the Invention

[0005] The purpose of this application is to address the technical problems of existing double-layer sleeved filter belt type cow manure dewatering equipment, which uses an open pressure filter structure. Loose cow manure is prone to lateral overflow and leakage during feeding and pressure filtration. Furthermore, the open feeding method cannot control the material filling thickness, resulting in significant differences in the amount of filler in different areas, thus leading to poor uniformity of the dewatered finished product. In contrast to existing technologies, this application provides a cow manure dewatering processing device, comprising: frame; The main pressure roller is rotatably connected to the middle of the frame, and an arc-shaped bottom support plate is provided at the bottom of the main pressure roller; The filter press mechanism includes an outer filter press conveyor belt and an inner filter press conveyor belt. The frame is equipped with several conveyor rollers for driving the outer and inner filter press conveyor belts to run at the same speed and in the same direction. The conveyor rollers are driven by a conveyor motor and a frequency conversion synchronous control system. The outer filter press conveyor belt is sleeved on the outside of the inner filter press conveyor belt. The bottom of both the outer and inner filter press conveyor belts are provided with arc-shaped overlapping parts, and the top of both the outer and inner filter press conveyor belts are provided with parallel parts. The arc-shaped overlapping parts are located between the main pressure roller and the arc-shaped bottom support plate. The bottom sides of the outer filter press conveyor belt are also provided with a feeding winding part and a discharging winding part, respectively. The loading and unloading mechanism includes two sets of symmetrically arranged synchronous rollers. The feeding winding section and the unloading winding section are respectively wound around the corresponding synchronous rollers. The two sets of synchronous rollers are used to provide the cow manure to be dehydrated in the feeding winding section and to recover the dehydrated cow manure in the unloading winding section. A cleaning mechanism, located at the parallel section, is used to simultaneously clean the outer and inner filter press conveyor belts. It includes a conveyor belt located at the bottom of the parallel section and a bidirectional high-pressure nozzle located between the outer and inner filter press conveyor belts. The collection tank, located at the bottom of the arc-shaped bottom support mesh plate, is used to recycle filter press wastewater.

[0006] Furthermore, the main pressure roller is driven by a servo motor, and the rotational speed of the main pressure roller is equal to the conveying speed of the outer filter conveyor belt and the inner filter conveyor belt. The arc-shaped bottom support mesh plate is eccentrically set with respect to the main pressure roller, and the distance between the arc-shaped bottom support mesh plate and the main pressure roller gradually decreases along the feeding direction. The filter press mechanism is also equipped with two sets of independent tensioning components, which are respectively used to tension the outer filter press conveyor belt and the inner filter press conveyor belt. This is to compensate for the difference in circumference between the two outer filter press conveyor belts and the inner filter press conveyor belt, and to eliminate the stretching and wrinkling phenomena of the arc-shaped overlapping part.

[0007] Furthermore, the outer pressure filter conveyor belt is provided with several equidistantly arranged pressure grooves on the side close to the inner pressure filter conveyor belt. The pressure grooves are in the form of isosceles trapezoidal grooves, and adjacent pressure grooves are arranged in opposite directions. The groove depth on the long side of the isosceles trapezoid is greater than the groove depth on the short side. The inner filter conveyor belt has an upper pressure groove on the side near the outer filter conveyor belt that fits into the lower pressure groove.

[0008] Furthermore, both the external and internal pressure filter conveyor belts are polypropylene (PP) monofilament double-layer gradient filter belts, and the lower and upper pressure grooves are made of PP material and are integrally hot-pressed with the corresponding external and internal pressure filter conveyor belts.

[0009] Furthermore, the loading and unloading mechanism also includes a loading pipe and a unloading pipe. The top of the loading pipe is provided with a loading port, and the bottom of the unloading pipe is provided with a unloading port. Two sets of loading pipes are symmetrically fixed at the feeding winding part, and two sets of unloading pipes are symmetrically fixed at the unloading winding part. Two sets of synchronous rollers are respectively rotatably connected between the two sets of loading pipes and the two sets of unloading pipes. Two sets of feeding pipes and two sets of discharging pipes are rotatably connected by a conveying shaft, and two sets of symmetrically arranged spiral blades are fixed on the outer wall of the conveying shaft.

[0010] Furthermore, the outer side of the synchronous roller is provided with a mating notch that matches the lower pressure groove and the upper pressure groove. The spiral blade is made of flexible material, and the outer edge of the spiral blade is in clearance fit with the outer wall of the synchronous roller. The radius of the spiral blade is smaller than the radius of the synchronous roller.

[0011] Furthermore, the rotation direction of the conveyor shaft at the feeding winding section is opposite to the rotation direction of the spiral blades at the unloading winding section.

[0012] Furthermore, drive gears are fixed at both ends of the synchronous roller, and the drive gears are driven by a synchronous motor. The rotational speed of the synchronous roller is equal to the conveying speed of the outer filter conveyor belt and the inner filter conveyor belt, and the rotational speed of the conveyor shaft is greater than the rotational speed of the synchronous roller.

[0013] A cow dung dehydration process includes the following steps: S1. Feeding and Shaping: The cow manure to be dehydrated is fed into the feeding pipe through the feeding port. The conveying shaft on the feeding side drives the spiral blades to transport the cow manure, so that the cow manure fills the space between the lower pressure trough and the upper pressure trough. The synchronous roller cooperates with the trough to limit the cow manure and prevent leakage during the conveying process. S2. Gradient Filtration: The outer and inner filter conveyor belts carrying cow dung run to the arc-shaped overlapping section. Utilizing the gradually changing gap structure between the main pressure roller and the eccentric arc-shaped bottom support mesh plate, the cow dung is squeezed and dewatered step by step. Wastewater flows into the collection tank through the pores of the outer and inner filter conveyor belts. The interlocking lower and upper pressure troughs form a drainage channel, accelerating the discharge of wastewater. S3, Reverse Discharge: The dehydrated cow manure is conveyed to the feeding and winding section along the filter belt. Relying on the characteristic that the spiral blades on the feeding side and the feeding side rotate in opposite directions, the dry cow manure in the lower and upper pressure troughs is peeled off and finally discharged and collected from the discharge port of the feeding pipe. S4. Cleaning and Returning Material: After unloading, the outer and inner filter conveyor belts run to the parallel section, where bidirectional high-pressure nozzles work with the bottom conveyor belt to complete the cleaning. The conveyor belts collect the cow manure residue generated during cleaning and transport the gravity-dehydrated residue to the feeding pipe for secondary filter conveying. The filter belts circulate, realizing continuous automated closed-loop dewatering of cow manure.

[0014] Compared to existing technologies, the advantages of this application are: This invention features a lower pressure groove and an upper pressure groove on the inner sides of the outer and inner filter press conveyor belts, respectively. The lower and upper pressure grooves interlock to form a closed filter press chamber, which can laterally limit loose cow manure in all directions. This solves the problems of lateral material overflow and leakage in traditional open filter press structures, reduces raw material waste, and lowers equipment cleaning and maintenance costs.

[0015] Meanwhile, this invention relies on the cavity formed by the combination of the lower and upper pressure grooves to carry out quantitative filling, which can unify the filling thickness of cow dung in the lower and upper pressure grooves at different positions, solving the defect of uneven thickness of traditional open feeding filling; combined with the eccentric gradual gap structure of the main pressure roller and the arc-shaped bottom support mesh plate, gradient extrusion dewatering is realized, ensuring that all materials are subjected to consistent pressure conditions, effectively improving the uniformity of dewatering of the finished product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front structure of this application; Figure 2This is a schematic diagram of the bottom structure of this application; Figure 3 This is a schematic diagram of the internal structure of this application; Figure 4 This is a schematic diagram of the filter press mechanism and main pressure roller proposed in this application; Figure 5 for Figure 4 Enlarged structural diagram of section A in the middle; Figure 6 This is a schematic diagram of the lower pressure groove and the upper pressure groove proposed in this application; Figure 7 This is a schematic diagram showing the state of the lower and upper pressure grooves when they are pressed together, as proposed in this application. Figure 8 This is a schematic diagram of the loading and unloading mechanism proposed in this application; Figure 9 This is an exploded structural diagram of the loading and unloading mechanism proposed in this application; Figure 10 This is a cross-sectional structural diagram of this application; Figure 11 This is a schematic diagram of the conveying direction of the filter press mechanism proposed in this application; Figure 12 This is a schematic diagram showing the state of multiple sets of cow dung dewatering processing devices proposed in this application when they are assembled and used in parallel.

[0017] Explanation of the labels in the diagram: 1. Frame; 11. Conveyor rollers; 12. Conveyor motor; 2. Loading and unloading mechanism; 21. Loading pipe; 211. Loading port; 22. Unloading pipe; 221. Unloading port; 23. Conveying shaft; 231. Spiral blade; 24. Synchronous roller; 241. Drive gear; 242. Matching notch groove; 3. Cleaning mechanism; 31. Two-way high-pressure nozzle; 32. Conveyor belt; 4. Main pressure roller; 41. Arc-shaped bottom support plate; 5. Filter press mechanism; 501. Lower pressure groove; 502. Upper pressure groove; 503. Arc-shaped overlapping part; 504. Parallel part; 51. Outer filter press conveyor belt; 511. Feed winding part; 512. Discharge winding part; 52. Inner filter press conveyor belt; 6. Collection tank. Detailed Implementation

[0018] The embodiments will be described clearly and completely with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0019] Example 1: This invention provides a dewatering processing device and process for cow dung. Please refer to [link / reference]. Figure 1 - Figure 12 It includes a frame 1, a main pressure roller 4, a filter press 5, a loading and unloading mechanism 2, a cleaning mechanism 3, and a collection tank 6; Please refer to this first. Figure 1 - Figure 4 The main pressure roller 4 is rotatably mounted in the middle of the frame 1, and an arc-shaped bottom support screen plate 41 is fixedly installed at the bottom of the main pressure roller 4. The filter press mechanism 5, as the core dewatering structure of the device, is composed of an outer filter press conveyor belt 51 and an inner filter press conveyor belt 52. The outer filter press conveyor belt 51 is sleeved on the outside of the inner filter press conveyor belt 52. Multiple sets of conveyor rollers 11 are rotatably mounted on the frame 1. All conveyor rollers 11 are uniformly driven by a conveyor motor 12 with a frequency conversion synchronous control system, thereby driving the outer filter press conveyor belt 51 and the inner filter press conveyor belt 52 to maintain the same speed and direction of circulation.

[0020] Please refer to this first. Figure 4 The outer filter conveyor belt 51 and the inner filter conveyor belt 52 are provided with an arc-shaped overlapping part 503 at the bottom and a parallel part 504 at the top. The arc-shaped overlapping part 503 is arranged in the area between the main pressure roller 4 and the arc-shaped bottom support mesh plate 41 to complete the extrusion and dewatering of cow manure. The bottom left and right sides of the outer filter conveyor belt 51 are respectively formed with a feeding winding part 511 and a discharging winding part 512.

[0021] Please refer to this first. Figure 1 and Figure 8 - Figure 10 The loading and unloading mechanism 2 includes two sets of symmetrically arranged synchronous rollers 24. The feeding winding part 511 and the unloading winding part 512 are respectively wound around the surfaces of the two sets of synchronous rollers 24. The cleaning mechanism 3 is installed as a whole at the parallel part 504 and consists of a bidirectional high-pressure nozzle 31 and a conveyor belt 32. It can simultaneously complete the cleaning operations of the outer filter conveyor belt 51 and the inner filter conveyor belt 52. The collection tank 6 is fixedly installed directly below the arc-shaped bottom support mesh plate 41 to collect the wastewater generated by the filter pressing operation.

[0022] The power input end of the main pressure roller 4 is connected to a servo motor, which can precisely control the operating speed of the main pressure roller 4 and ensure that the speed of the main pressure roller 4 is completely consistent with the conveying speed of the outer filter conveyor belt 51 and the inner filter conveyor belt 52. The arc-shaped bottom support plate 41 is set in an eccentric state relative to the main pressure roller 4, so that the vertical distance between the arc-shaped bottom support plate 41 and the main pressure roller 4 gradually decreases along the material feeding and conveying direction, realizing gradient extrusion. The filter pressing mechanism 5 is equipped with two sets of independent tensioning components, which are matched one-to-one with the outer filter conveyor belt 51 and the inner filter conveyor belt 52 respectively. The operator can adjust the tension stroke of a single conveyor belt individually according to the equipment operating status, effectively compensating for the circumference difference generated when the outer filter conveyor belt 51 and the inner filter conveyor belt 52 are running around the roller, and completely eliminating the problems of conveyor belt stretching, wrinkling and deviation at the arc-shaped overlapping part 503.

[0023] On the inner surface of the outer filter press conveyor belt 51 facing the inner filter press conveyor belt 52, there are several lower pressure grooves 501 arranged in an array. All lower pressure grooves 501 are set as isosceles trapezoidal groove structures. Adjacent lower pressure grooves 501 are arranged in opposite directions. The groove depth on the long side of the isosceles trapezoid of the lower pressure groove 501 is greater than the groove depth on the short side. On the inner surface of the inner filter press conveyor belt 52 facing the outer filter press conveyor belt 51, there are several upper pressure grooves 502. The number and structural specifications of the upper pressure grooves 502 are completely matched with the lower pressure grooves 501.

[0024] Please refer to this first. Figure 4 - Figure 7 In actual operation, the lower pressure trough 501 and the upper pressure trough 502 rotate synchronously with the outer filter conveyor belt 51 and the inner filter conveyor belt 52, which can complete the entire set of actions of automatic closing for feeding, filter drainage, and automatic opening for unloading. Specifically, the mating notch 242 on the surface of the synchronous roller 24 synchronously engages with the lower pressure trough 501, maintaining a synchronous mating state. At this time, the cow dung material pushed by the conveyor shaft 23 and the spiral blades 231 can directly pass through the mating notch 242 and fill the lower pressure trough 501. Inside 01, when the double-layer conveyor belt runs to the feeding winding section 511, the outer filter press conveyor belt 51 and the inner filter press conveyor belt 52 gradually come into contact with each other, and the openings of the lower pressure groove 501 and the upper pressure groove 502 are aligned and completed to form a closed columnar filter press chamber. The material is fully restricted by the side walls of the lower pressure groove 501 and the upper pressure groove 502, avoiding the problem of loose cow manure overflowing and leaking to the side. At the same time, the material filling thickness in each chamber is uniform, ensuring the uniformity of subsequent dewatering.

[0025] The closed cavities of the lower pressure trough 501 and upper pressure trough 502, carrying cow dung, enter the arc-shaped overlapping section 503 along with the conveyor belt. Under the gradient squeezing action of the main pressure roller 4 and the arc-shaped bottom support mesh plate 41, the water inside the cow dung is released outward. Taking advantage of the structural characteristic that the long side of the lower pressure trough 501 is deeper than the short side, the lower pressure trough 501 and the upper pressure trough 502 are interlocked to form a staggered slit-type drainage channel. The released wastewater can be quickly discharged to both sides along the preset drainage channels of the lower pressure trough 501 and the upper pressure trough 502, and drip into the collection tank 6 through the water-permeable pores of the outer pressure filter conveyor belt 51 and the inner pressure filter conveyor belt 52, effectively solving the problem of wastewater accumulating inside the material and improving the solid-liquid separation efficiency.

[0026] After gradient filtration, the solid cow dung is conveyed to the unloading winding section 512 by the outer filter conveyor belt 51 and the inner filter conveyor belt 52. Affected by the change in the bending curvature of the conveyor belt around the synchronous roller 24, the outer filter conveyor belt 51 and the inner filter conveyor belt 52 gradually separate from the attached state. The corresponding lower pressure groove 501 and upper pressure groove 502 open synchronously in opposite directions, and the originally sealed filter chamber is opened from top to bottom. With the axial thrust generated by the reverse rotation of the unloading side spiral blade 231, the solidified cow dung cake loses the clamping constraint of the groove and falls smoothly from the lower pressure groove 501 and the upper pressure groove 502 for unloading. The unloading is without jamming or residue, which is suitable for continuous automated production operations.

[0027] Both the external pressure filter conveyor belt 51 and the internal pressure filter conveyor belt 52 are made of polypropylene (PP) monofilament double-layer gradient filter belt. This material has water permeability, wear resistance, corrosion resistance, and high tensile strength. The lower pressure groove 501 and the upper pressure groove 502 are also made of PP material. The lower pressure groove 501 and the external pressure filter conveyor belt 51, and the upper pressure groove 502 and the internal pressure filter conveyor belt 52 are all made of high temperature integrated hot pressing molding process. The overall structure has strong stability and is not easy to crack or fall off during long-term high-pressure operation.

[0028] The loading and unloading mechanism 2 is also equipped with a loading pipe 21 and a unloading pipe 22. The top end of the loading pipe 21 has a loading port 211 for feeding raw materials, and the bottom end of the unloading pipe 22 has a unloading port 221 for discharging finished dried cow manure. The two sets of loading pipes 21 are symmetrically fixedly assembled on both sides of the feeding winding part 511, and the two sets of unloading pipes 22 are symmetrically fixedly assembled on both sides of the unloading winding part 512. Two sets of synchronous rollers 24 are rotatably connected between the two sets of loading pipes 21 and between the two sets of unloading pipes 22. The inside of both the loading pipe 21 and the unloading pipe 22 is rotatably installed with a conveying shaft 23. Two sets of spiral blades 231 are symmetrically fixedly installed on the outer cylindrical surface of the conveying shaft 23. The material conveying and unloading operations are realized by the rotation of the spiral blades 231.

[0029] The outer annular surface of the synchronous roller 24 is provided with several mating notches 242. The structural dimensions and arrangement spacing of the mating notches 242 are adapted to the lower pressure groove 501 and the upper pressure groove 502 to ensure a higher fit when the filter belt is wound around the synchronous roller 24. The spiral blade 231 is made of flexible and wear-resistant material. The outer edge of the spiral blade 231 is installed with the outer wall of the synchronous roller 24 in a clearance fit manner. At the same time, the maximum rotation radius of the spiral blade 231 is smaller than the outer circle radius of the synchronous roller 24, which avoids hard interference between components from the structural level, protects the equipment structure and avoids damage to the filter belt.

[0030] The conveying shaft 23, which is installed inside the feeding pipe 21 of the feeding winding section 511, rotates in the opposite direction to the rotation direction of the spiral blades 231 on the conveying shaft 23 inside the feeding pipe 22 of the unloading winding section 512. The forward-rotating spiral blades 231 complete the uniform feeding and filling of the cow dung to be dehydrated, while the reverse-rotating spiral blades 231 complete the forced peeling and unloading of the shaped dry cow dung, thus realizing integrated loading and unloading operations.

[0031] Drive gears 241 are fixedly installed on both ends of the synchronous roller 24. The drive gears 241 at both ends mesh with the output gears of the external synchronous motor, and the synchronous roller 24 is driven to rotate by the synchronous motor. The parameters of the synchronous motor are adjusted to ensure that the linear speed of the synchronous roller 24 is consistent with the conveying speed of the external filter conveyor belt 51 and the internal filter conveyor belt 52. The drive motor of the conveyor shaft 23 has a higher speed than the synchronous roller 24, and the speed difference is used to improve the material conveying efficiency and unloading cleanliness.

[0032] Please see Figure 12 When the workload of dehydrating cow manure is large, multiple sets of cow manure dehydration processing devices can be assembled and used in parallel. The upper conveyor unit feeds the multiple sets of cow manure dehydration processing devices synchronously through the feeding pipe 21, and the lower conveyor unit feeds the multiple sets of cow manure dehydration processing devices synchronously through the discharging pipe 22, thereby achieving the effect of synchronous operation of multiple units and meeting the needs of heavy-load dehydration operations.

[0033] This embodiment also provides a cow manure dehydration process, which is compatible with the above-mentioned cow manure dehydration processing device. The specific operation process is as follows: S1. Feeding and Shaping: The operator feeds the pre-treated cow dung material to be dehydrated into the equipment through the feeding port 211 at the top of the feeding pipe 21; the feeding side conveying shaft 23 drives the spiral blades 231 to rotate at a constant speed and convey the cow dung, so that the cow dung is evenly filled between the interlocking lower pressure groove 501 and upper pressure groove 502; the mating notch groove 242 on the outside of the synchronous roller 24 cooperates with the lower pressure groove 501 to limit the loose cow dung in all directions, prevent lateral leakage during material conveying, and ensure uniform feeding thickness.

[0034] S2, Gradient Filtration: The outer filter conveyor belt 51 and the inner filter conveyor belt 52, after being filled with cow dung material, move synchronously to the arc-shaped overlapping section 503 area; relying on the gradually changing extrusion gap formed by the main pressure roller 4 and the eccentrically arranged arc-shaped bottom support mesh plate 41, the extrusion force is gradually increased along the material conveying direction to complete the multi-stage gradient extrusion dewatering of cow dung; the wastewater generated by extrusion drips down through the permeable pores of the outer filter conveyor belt 51 and the inner filter conveyor belt 52, and finally flows into the bottom collection tank 6; the lower pressure tank 501 and the upper pressure tank 502 are fitted together to form an independent drainage channel, which can quickly remove the wastewater retained in the lower pressure tank 501 and the upper pressure tank 502, further improving the dewatering efficiency.

[0035] S3. Reverse unloading: After the solid cow manure has been dewatered by gradient pressure filtration, it is transported to the unloading winding section 512 by the outer pressure filter conveyor belt 51 and the inner pressure filter conveyor belt 52. Utilizing the characteristic that the spiral blades 231 on the surface of the unloading side conveyor shaft 23 rotate in opposite directions to the spiral blades 231 on the feeding side, and in conjunction with the structural feature of the filter belt bending and misaligning around the synchronous roller 24, the solidified dry cow manure is completely peeled off from the inside of the lower pressure trough 501 and the upper pressure trough 502. The peeled finished dry cow manure is discharged and collected uniformly through the discharge port 221 at the bottom of the discharge pipe 22.

[0036] S4. Cleaning and Returning Material: After the unloading operation, the outer filter conveyor belt 51 and the inner filter conveyor belt 52 circulate to the top parallel section 504; the bidirectional high-pressure nozzles 31 arranged between the double-layer conveyor belts spray high-pressure clean water in both directions to flush away the fine manure residue remaining in the gaps of the tank; the conveyor belt 32 at the bottom of the parallel section 504 simultaneously scrapes off stubborn adhering substances on the surface of the filter belt and collects all the cow manure residue generated during the cleaning operation; after the conveyor belt 32 performs simple gravity dewatering on the residual manure, it transports the residual material back to the inside of the feed pipe 21, mixes it with the original cow manure material, and participates in the filter pressing operation again; the filter belt continues to circulate, thereby realizing the continuous automated closed-loop dewatering operation of cow manure.

[0037] The above description is merely the best implementation method adopted in light of current practical needs, but the scope of protection of this application is not limited thereto.

Claims

1. A cow dung dewatering processing device, characterized in that, include: Rack (1); The main pressure roller (4) is rotatably connected to the middle of the frame (1), and the bottom of the main pressure roller (4) is provided with an arc-shaped bottom support mesh plate (41). The filter press mechanism (5) includes an outer filter press conveyor belt (51) and an inner filter press conveyor belt (52). The frame (1) is equipped with several conveyor rollers (11) for driving the outer filter press conveyor belt (51) and the inner filter press conveyor belt (52) to run at the same speed and in the same direction. The conveyor rollers (11) are driven by a conveyor motor (12) with a frequency conversion synchronous control system. The outer filter press conveyor belt (51) is sleeved on the outside of the inner filter press conveyor belt (52). Both the conveyor belt (51) and the inner filter conveyor belt (52) have an arc-shaped overlapping part (503) at their bottoms. Both the outer filter conveyor belt (51) and the inner filter conveyor belt (52) have a parallel part (504) at their tops. The arc-shaped overlapping part (503) is located between the main pressure roller (4) and the arc-shaped bottom support plate (41). The bottom sides of the outer filter conveyor belt (51) are also provided with a feeding winding part (511) and a discharging winding part (512). The loading and unloading mechanism (2) includes two sets of symmetrically arranged synchronous rollers (24). The feeding winding part (511) and the unloading winding part (512) are respectively wound around the corresponding synchronous rollers (24). The two sets of synchronous rollers (24) are respectively used to provide the cow manure to be dehydrated in the feeding winding part (511) and to recover the dehydrated cow manure in the unloading winding part (512). The cleaning mechanism (3) is located at the parallel section (504) and is used to simultaneously clean the outer filter conveyor belt (51) and the inner filter conveyor belt (52). It includes a conveyor belt (32) located at the bottom of the parallel section (504) and a bidirectional high-pressure nozzle (31) located between the outer filter conveyor belt (51) and the inner filter conveyor belt (52). The collection tank (6) is located at the bottom of the arc-shaped bottom support mesh plate (41) and is used to recycle filter press wastewater.

2. The cow dung dewatering processing device according to claim 1, characterized in that, The main pressure roller (4) is driven by a servo motor. The rotation speed of the main pressure roller (4) is equal to the conveying speed of the outer filter conveyor belt (51) and the inner filter conveyor belt (52). The arc-shaped bottom support mesh plate (41) is eccentrically set with the main pressure roller (4). The distance between the arc-shaped bottom support mesh plate (41) and the main pressure roller (4) gradually decreases along the feeding direction. The filter press mechanism (5) is also provided with two independent tensioning components. The two independent tensioning components are respectively for tensioning the outer filter press conveyor belt (51) and the inner filter press conveyor belt (52), which are used to compensate for the difference in circumference between the two outer filter press conveyor belts (51) and the inner filter press conveyor belt (52) and eliminate the stretching and wrinkling phenomenon of the arc-shaped overlapping part (503).

3. The cow dung dewatering processing device according to claim 2, characterized in that, The outer filter conveyor belt (51) has several equal-spaced pressure grooves (501) arranged on the side close to the inner filter conveyor belt (52). The pressure grooves (501) are isosceles trapezoidal groove structures. Adjacent pressure grooves (501) are arranged in opposite directions. The groove depth on the long side of the isosceles trapezoid of the pressure groove (501) is greater than the groove depth on the short side. The inner pressure filter conveyor belt (52) is provided with an upper pressure groove (502) that fits into the lower pressure groove (501) on the side close to the outer pressure filter conveyor belt (51).

4. The cow dung dewatering processing device according to claim 3, characterized in that, The outer pressure filter conveyor belt (51) and the inner pressure filter conveyor belt (52) are both polypropylene (PP) monofilament double-layer gradient filter belts. The lower pressure groove (501) and the upper pressure groove (502) are both made of PP material and are integrally hot-pressed with the corresponding outer pressure filter conveyor belt (51) and inner pressure filter conveyor belt (52).

5. The cow dung dewatering processing device according to claim 4, characterized in that, The loading and unloading mechanism (2) further includes a loading pipe (21) and a unloading pipe (22). The top of the loading pipe (21) is provided with a loading port (211), and the bottom of the unloading pipe (22) is provided with a unloading port (221). The two sets of loading pipes (21) are symmetrically fixed at the feeding winding part (511), and the two sets of unloading pipes (22) are symmetrically fixed at the unloading winding part (512). The two sets of synchronous rollers (24) are rotatably connected between the two sets of loading pipes (21) and the two sets of unloading pipes (22). Two sets of feeding pipes (21) and two sets of discharging pipes (22) are rotatably connected by a conveying shaft (23), and two sets of symmetrically arranged spiral blades (231) are fixed on the outer wall of the conveying shaft (23).

6. The cow dung dewatering processing device according to claim 5, characterized in that, The outer side of the synchronous roller (24) is also provided with a matching notch (242) that matches the lower pressure groove (501) and the upper pressure groove (502). The spiral blade (231) is made of flexible material. The outer edge of the spiral blade (231) is in clearance fit with the outer wall of the synchronous roller (24), and the radius of the spiral blade (231) is smaller than the radius of the synchronous roller (24).

7. The cow dung dewatering processing device according to claim 6, characterized in that, The rotation direction of the conveying shaft (23) at the feeding winding section (511) is opposite to the rotation direction of the spiral blade (231) at the unloading winding section (512).

8. The cow dung dewatering processing device according to claim 7, characterized in that, Both ends of the synchronous roller (24) are fixed with drive gears (241), which are driven by a synchronous motor. The rotational speed of the synchronous roller (24) is equal to the conveying speed of the outer filter conveyor belt (51) and the inner filter conveyor belt (52). The rotational speed of the conveying shaft (23) is greater than that of the synchronous roller (24).

9. A cow dung dewatering process, applicable to the cow dung dewatering processing apparatus described in claim 8, characterized in that, Includes the following steps: S1. Feeding and shaping: The cow manure to be dehydrated is fed into the feeding pipe (21) through the feeding port (211). The feeding side conveying shaft (23) drives the spiral blade (231) to transport the cow manure, so that the cow manure fills between the lower pressure trough (501) and the upper pressure trough (502). The synchronous roller (24) cooperates with the trough to limit the cow manure and avoid leakage during the conveying process. S2, Gradient Filtration: The outer filter conveyor belt (51) and inner filter conveyor belt (52) carrying cow manure run to the arc-shaped overlapping part (503). The cow manure is squeezed and dewatered step by step by the gradual gap structure of the main pressure roller (4) and the eccentric arc-shaped bottom support mesh plate (41). The wastewater flows into the collection tank (6) through the pores of the outer filter conveyor belt (51) and inner filter conveyor belt (52). The interlocking lower pressure tank (501) and upper pressure tank (502) form a drainage channel to accelerate the discharge of sewage. S3, Reverse discharge: The dehydrated cow manure is transported to the feeding winding section (512) along with the filter belt. Relying on the characteristic that the spiral blades (231) on the feeding side and the feeding side rotate in opposite directions, the dry cow manure in the lower pressing trough (501) and upper pressing trough (502) is peeled off and finally discharged and collected from the discharge port (221) of the feeding pipe (22). S4. Cleaning and Returning Material: After unloading, the outer filter conveyor belt (51) and the inner filter conveyor belt (52) run to the parallel section (504). The bidirectional high-pressure nozzle (31) works with the bottom conveyor belt (32) to complete the cleaning. The conveyor belt (32) collects the cow manure residue generated during cleaning and transports the gravity-dehydrated residue to the feeding pipe (21) for secondary filter conveying. The filter belt circulates to realize continuous automated closed-loop dehydration of cow manure.

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