Deep separation device for fine particles in pig farm manure

Abstract

The deep separation device comprises a secondary solid-liquid separation mechanism arranged at the downstream of primary solid-liquid separation equipment, the secondary solid-liquid separation mechanism comprises a power system, the output end of the power system is connected with a rotating shaft, and a liquid manure collecting tank which is arranged in the radial direction and has a filtering function is fixedly arranged on the rotating shaft; the manure liquid flowing out of the manure liquid outlet of the primary solid-liquid separation equipment just falls into the manure liquid collecting tank in the initial state, the vertical area where the rotating shaft is located serves as a boundary area, the space on the left side of the boundary area serves as a fine particle collecting area, and the space on the right side of the boundary area serves as a filtered manure liquid temporary storage area. According to the invention, the separation effect of the fine particles in the manure liquid is improved, the blockage can be efficiently and easily cleaned, the service life of the filter element is greatly prolonged, and the fine particles can be directly guided out from the filter element quickly and smoothly.

Description

Technical Field

[0001] The invention belongs to the technical field of pig farm manure treatment equipment, and in particular relates to a device for deep separation of fine particles in pig farm manure. Background Art

[0002] The pig farm manure solid-liquid separation equipment developed in the early stage (see document CN117069357B for details) includes a cylinder, which is vertically and fixedly installed in a manure pit. The entire side wall of the cylinder is provided with a number of through holes, and a manure feeding channel is provided on the upper part of the cylinder, and a valve is provided on the manure feeding channel; a movable rod is provided in the inner cavity of the cylinder, and the upper end of the movable rod is connected to a hydraulic drive system, and a movable seat is provided in the inner cavity of the cylinder and below the movable rod. The movable seat is connected to a lifting mechanism, and the lifting mechanism is used to lift the movable seat to a specified height, and the movable rod, the movable seat and the cylinder together enclose a manure accommodating space with a variable volume; a pushing mechanism is provided on the top of the cylinder, and the pushing mechanism is used to push the "solid" material moved to the top of the cylinder to the discharge channel, and the discharge channel is located outside the manure pit.

[0003] Although the aforementioned pig farm manure solid-liquid separation equipment fundamentally avoids the problem of solid-liquid separation equipment being blocked or even stuck due to strip or surface residues and plant fiber residues, and can accurately control the moisture content in the solids to avoid reverse osmosis of manure and liquid, its application shows that it is mainly suitable for primary solid-liquid separation processes. If it is used for deep separation of fine particles (particle size not exceeding 1 mm), the effect is poor because the slurry containing fine particles is easy to spray out from the through holes on the side wall of the cylinder.

[0004] Studies have shown that precision filtration is a more suitable method for separating fine particles from fecal liquid. However, this method is particularly prone to clogging of the filter element (filter cartridge) and is difficult to clear efficiently and easily. This is also one of the fundamental reasons why the filter elements of existing high-end fecal liquid separation equipment have a short service life and need to be replaced regularly, and it is difficult to quickly and smoothly remove fine particles. Summary of the invention

[0005] The present invention aims to provide a device for deep separation of fine particles in pig farm manure, which can at least quickly and easily clear blockages (clean blockage areas) and effectively extend the service life of filter elements.

[0006] The present invention adopts the following technical solution.

[0007] A device for deeply separating fine particles in pig farm manure includes a secondary solid-liquid separation mechanism arranged downstream of a primary solid-liquid separation device. The secondary solid-liquid separation mechanism includes a power system. The output end of the power system is connected to a rotating shaft. A radially arranged manure collection tank with a filtering function is fixedly arranged on the rotating shaft. The manure flowing out of the manure outlet of the primary solid-liquid separation device just falls into the manure collection tank in an initial state. The vertical area where the rotating shaft is located is used as a boundary area, the space on the left side of the boundary area is used as a fine particle collection area, and the space on the right side of the boundary area is used as a filtered manure temporary storage area.

[0008] Furthermore, a partition is arranged directly below the rotating shaft.

[0009] Furthermore, a guide groove is provided in the fine particle collection area, and the central area of ​​the guide groove and the central area of ​​the feces liquid collection groove are located in the same vertical plane.

[0010] Furthermore, when the manure collection tank is in the initial state, the angle between the center line of the manure collection tank and the horizontal plane is 5~8°, and the manure collection tank is lower on the left and higher on the right. Such a structure can separate fine particles more smoothly.

[0011] Furthermore, a limiter is provided in the fine particle collection area, and the limiter is a plate or a trough body arranged with the left side higher and the right side lower. When the manure collection trough is flipped to the left to the limit position, the end of the manure collection trough just abuts against the limiter. With such a structure, fine particles can be separated more easily.

[0012] Furthermore, the inner cavity of the manure collection tank has a plurality of closely arranged needles, the maximum diameter of the needles does not exceed 3 mm, the spacing between adjacent needles does not exceed 5 mm, and the inner wall of the manure collection tank has a plurality of micropores with a pore size not greater than 0.5 mm. With such a structure, fine particles can be separated more easily, more efficiently, more smoothly, and more effectively.

[0013] As one of the preferred solutions of the present invention, the power system is connected to the controller, and the processor of the controller implements the following steps when executing its program: S1, control the power system to pause or shut down, so that the manure collection tank remains in the initial state for a set time; S2, at a preset time point 1, controlling the power system to operate so that the shaft rapidly rotates counterclockwise by a preset angle; S3, after step S2 is completed, the power system is controlled to operate so that the rotating shaft rotates in a clockwise direction to reset the manure collection tank; S4, repeat steps S1 to S3.

[0014] As a second preferred solution of the present invention, the power system is connected to the controller, and the processor of the controller implements the following steps when executing its program: S11, controlling the power system to pause or shut down, so that the manure collection tank remains in the initial state for a set time; S12, at a preset time point 1, the power system is controlled to operate so that the shaft is reciprocated and swung for a preset time in a manner of "first rotating counterclockwise rapidly to the left extreme position and then rotating right rapidly to the vertical position", during which the manure collection tank repeatedly hits the limiter; S13, after step S12 is completed, the power system is controlled to operate so that the rotating shaft rotates in a clockwise direction to reset the manure collection tank; S14, repeat steps S11 to S13.

[0015] More preferably, the rapid rotation speed is 2-5 r / s.

[0016] More preferably, the feces collection tank and the needle body are made of corrosion-resistant metal materials (such as stainless steel).

[0017] Beneficial effects: The scheme of the present invention not only improves the separation effect of fine particles in fecal liquid, but also can efficiently and easily clear blockages (clean the blockage of the filter element), greatly improve the service life of the filter element (compared with the filter net or filter membrane with the same filtering function, the service life can be extended by more than ten times), and can also quickly and smoothly guide fine particles directly out of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 3D schematic diagram of the secondary solid-liquid separation mechanism of the device for deep separation of fine particles in pig farm manure in Example 1 (the manure liquid collection tank is in the initial state); Figure 2 yes Figure 1 Schematic cross-sectional view of ; Figure 3 yes Figure 1 Schematic diagram of the top view; Figure 4 yes Figure 1 Explosion diagram of Figure 5 yes Figure 1 A partial schematic diagram of the manure liquid collection tank; Figure 6 is a three-dimensional schematic diagram of the secondary solid-liquid separation mechanism in Example 1 (the state when the feces liquid collection tank 2 hits the limiter); Figure 7 yes Figure 6 Schematic cross-section diagram of . DETAILED DESCRIPTION

[0019] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example 1

[0020] Combination Figures 1 to 7 As shown, a device for deep separation of fine particles in pig manure includes a secondary solid-liquid separation mechanism arranged downstream of a primary solid-liquid separation device. The primary solid-liquid separation adopts the pig manure solid-liquid separation device developed in the early stage (see document CN117069357B for details). The secondary solid-liquid separation mechanism includes a power system, which adopts a motor. The output end of the power system is connected to a rotating shaft 1. A radially arranged feces collection tank 2 with a filtering function is fixedly arranged on the rotating shaft 1. The feces flowing out of the feces outlet of the primary solid-liquid separation device (solids with a particle size greater than 2 mm in the feces have been separated and removed in the primary solid-liquid separation device, but the feces still contain a lot of fine particles) just falls into the feces collection tank 2 in the initial state, and the vertical area where the rotating shaft 1 is located is the boundary area, the space on the left side of the boundary area is used as a fine particle collection area 3, and the space on the right side of the boundary area is used as a filtered feces temporary storage area 4.

[0021] In this embodiment, a partition 5 is arranged directly below the rotating shaft 1; a guide groove 6 is arranged in the fine particle collection area 3, and the central area of ​​the guide groove 6 and the central area of ​​the manure liquid collecting tank 2 are located in the same vertical plane; when the manure liquid collecting tank 2 is in the initial state, the angle between the center line of the manure liquid collecting tank 2 and the horizontal plane is 5~8°, and the manure liquid collecting tank 2 is lower on the left and higher on the right; a limiting member 7 is arranged in the fine particle collection area 3, and the limiting member 7 adopts a plate body or a trough body arranged with a high left and a low right. When the manure liquid collecting tank 2 is flipped to the left to the extreme position, the end of the manure liquid collecting tank 2 just rests on the limiting member 7.

[0022] In this embodiment, combined with Figure 5As shown, the inner cavity of the feces collection tank 2 has a plurality of needle bodies 8 arranged closely together, the needle bodies 8 are fixedly connected to the wall of the feces collection tank 2, the maximum diameter of the needle bodies 8 does not exceed 3 mm, the length of the needle bodies 8 is 30 mm, the maximum spacing between adjacent needle bodies 8 is not greater than 5 mm (the maximum spacing refers to the distance between the tips of adjacent needle bodies 8), and the inner wall of the feces collection tank 2 has a plurality of micropores with an aperture of not greater than 0.5 mm. The feces collection tank 2, the needle bodies 8, the rotating shaft 1, the guide groove 6, and the partition 5 are all made of corrosion-resistant metal materials, and the limiter 7 is made of polytetrafluoroethylene material. There are two methods for manufacturing the liquid feces collection tank 2 and installing the needle body 8: first, a plurality of needle bodies 8 are bundled together, and then the melt corresponding to the liquid feces collection tank 2 is poured into the mold, and when the melt is about to solidify and form, the bundled needle bodies 8 are inserted into the melt that is about to solidify, and then continue to cool and shape, and finally use laser drilling on the wall surface of the liquid feces collection tank 2; second, a plurality of needle bodies 8 are bundled together, and then the bundled needle bodies 8 are fixedly arranged, and the inner contour of the liquid feces collection tank 2 is formed by all the needle bodies 8, and then the melt corresponding to the liquid feces collection tank 2 is poured, and after cooling and shaping, the wall surface of the liquid feces collection tank 2 is drilled by laser.

[0023] In this embodiment, the power system is connected to the controller, and the processor of the controller implements the following steps when executing its program: S11, control the power system to pause or shut down, so that the manure collection tank 2 remains in the initial state for a set time. Figure 1-3 As shown; S12, at a preset time point 1, the power system is controlled to operate, so that the rotating shaft 1 is reciprocated and swung for a preset time in the manner of "first rotating counterclockwise rapidly to the left limit position - then rotating right rapidly to the vertical position". During this process, the manure collection tank 2 repeatedly hits the limiter 7. The state of the manure collection tank 2 when hitting the limiter 7 is as follows Figure 6 and Figure 7 As shown; the speed of rapid rotation is controlled to 2r / s; S13, after step S12 is completed, the power system is controlled to operate so that the rotating shaft 1 rotates in a clockwise direction to reset the manure collection tank 2; S14, repeat steps S11 to S13.

[0024] When in use, first adjust the feces collection tank 2 to be in the initial state. During this process, the feces flowing out of the feces outlet of the primary solid-liquid separation equipment just falls into the feces collection tank 2 in the initial state. The feces will be filtered in the feces collection tank 2 in the manner of "sedimentation + bypassing along the gap between adjacent needle bodies". The larger particles in the feces will remain near the tip of the needle body, and the smaller particles in the feces will remain in the middle or near the root of the needle body. The filtered liquid (i.e., filtered feces) flows through the micropores on the feces collection tank 2 to the filtered feces. Temporary storage area 4, the filtered fine particles will remain in the gap between adjacent needle bodies; when the feces collection tank 2 maintains the set time in the initial state, the control shaft 1 is controlled to swing back and forth in the manner of "first quickly rotating counterclockwise to the left extreme position - then quickly rotating right to the vertical position", the feces collection tank 2 will repeatedly hit the limiter 7, thereby shaking out the fine particles in the gap between the needle bodies, and these fine particles will fall into the fine particle collection area 3, thereby realizing the direct extraction of the fine particles from the filter element (feces collection tank 2).

[0025] Compared with conventional solid-liquid separation equipment of the same specifications (filter holes no greater than 0.5 mm, PVC filter element, theoretical service life is usually three months, and backwashing is required once every week of operation); the feces collection tank 2 in this embodiment has a theoretical service life of more than three years, which is more than ten times higher than the original service life. The backwashing process is completely eliminated, and the experiment has been running continuously for seven months without any filtration failure.

[0026] In the present embodiment, fine particles are collected by closely arranged needles, and each time the feces collection tank 2 hits the limiter 7, it cleans the feces collection tank 2 and separates and collects fine particles. This new technical route based on the deep separation of fine particles is essentially different from the traditional fine particle separation technology, and has the advantages of good separation effect of fine particles in feces, convenience, speed, efficiency and ease.

[0027] Since the limiter 7 is frequently hit during the process of collecting and separating fine particles, the fine particles can be directly guided out of the needle body quickly and smoothly only when hitting, without arranging special time and personnel for clearing the blockage, thereby achieving efficient and easy clearing of the filter element (feces liquid collection tank 2), and the fine particles will not accumulate in the feces liquid collection tank 2 for a long time, thereby greatly improving the service life of the filter element. Example 2

[0028] A device for deep separation of fine particles in pig farm manure, referring to Example 1, is different from Example 1 in that a power system is connected to a controller, and the processor of the controller implements the following steps when executing its program: S1, controlling the power system to pause or shut down, so that the manure collection tank 2 remains in the initial state for a set time; S2, at a preset time point 1, controlling the power system to operate so that the rotating shaft 1 rotates rapidly in a counterclockwise direction by a preset angle; S3, after step S2 is completed, the power system is controlled to operate so that the rotating shaft 1 rotates in a clockwise direction to reset the manure collection tank 2; S4, repeat steps S1 to S3.

Claims

1. A device for deep separation of fine particles in pig farm manure, comprising a secondary solid-liquid separation mechanism arranged downstream of a primary solid-liquid separation device, characterized in that: The secondary solid-liquid separation mechanism comprises a power system (6), the output end of the power system (6) is connected to a rotating shaft (1), a manure liquid collection tank (2) which is arranged radially and has a filtering function is fixedly provided on the rotating shaft (1), the manure liquid flowing out of the manure liquid outlet of the primary solid-liquid separation device just falls into the manure liquid collection tank (2) in an initial state, the vertical area where the rotating shaft (1) is located is used as a boundary area, the space on the left side of the boundary area is used as a fine particle collection area (3), and the space on the right side of the boundary area is used as a filtered manure liquid temporary storage area (4).

2. The separation device according to claim 1, characterized in that: A partition plate (5) is arranged directly below the rotating shaft (1).

3. The separation device according to claim 1, characterized in that: A guide groove is provided in the fine particle collection area (3), and the central area of ​​the guide groove and the central area of ​​the feces liquid collection groove (2) are located on the same vertical plane.

4. The separation device according to claim 1, characterized in that: When the liquid manure collecting trough (2) is in the initial state, the angle between the center line of the liquid manure collecting trough (2) and the horizontal plane is 5-8°, and the liquid manure collecting trough (2) is lower on the left and higher on the right.

5. The separation device according to claim 1, characterized in that: A limiting member (7) is provided in the fine particle collection area (3); the limiting member (7) is a plate body or a trough body arranged in a left-higher-than-right manner; when the manure collection trough (2) is flipped to the left to the extreme position, the end of the manure collection trough (2) just abuts against the limiting member (7).

6. A separation device according to any one of claims 1 to 5, characterized in that: The inner cavity of the feces liquid collection tank (2) has a plurality of needle bodies (8) arranged closely together, the maximum diameter of the needle bodies (8) does not exceed 3 mm, the maximum spacing between adjacent needle bodies (8) does not exceed 5 mm, and the inner wall of the feces liquid collection tank (2) has a plurality of micropores (9) with a pore size not greater than 0.5 mm.

7. The separation device according to any one of claims 1 to 6, characterized in that: The power system (6) is connected to a controller, and the processor of the controller implements the following steps when executing its program: S1, controlling the power system (6) to pause or shut down, so that the manure collection tank (2) remains in the initial state for a set time; S2, at a preset time point 1, controlling the power system (6) to operate so that the rotating shaft (1) rapidly rotates in a counterclockwise direction by a preset angle; S3, after step S2 is completed, the power system (6) is controlled to operate so that the rotating shaft (1) rotates in a clockwise direction to reset the manure collection tank (2); S4, repeat steps S1 to S3.

8. The separation device according to any one of claims 1 to 6, characterized in that: The power system (6) is connected to a controller, and the processor of the controller implements the following steps when executing its program: S11, controlling the power system (6) to pause or shut down, so that the manure collection tank (2) remains in the initial state for a set time; S12, at a preset time point 1, controlling the power system (6) to operate, causing the rotating shaft (1) to swing back and forth for a preset time in a manner of "first rapidly rotating counterclockwise to the left extreme position and then rapidly rotating rightward to the vertical position", during which the manure collection tank (2) repeatedly strikes the limit member (7); S13, after step S12 is completed, the power system (6) is controlled to operate so that the rotating shaft (1) rotates in a clockwise direction to achieve the reset of the manure collection tank (2); S14, repeat steps S11 to S13.

9. The separation device according to claim 8, characterized in that: The speed of rapid rotation is controlled at 2-5r / s.

10. The separation device according to claim 9, characterized in that: The manure liquid collecting tank (2) is made of corrosion-resistant metal material.

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