Efficient microfiltration equipment for biogas slurry in dairy farm

Abstract

The utility model discloses efficient microfiltration equipment for biogas slurry in a dairy farm, which comprises a treatment unit and a filtering unit, the treatment unit comprises a water tank and a three-way pipe fixedly communicated with the bottom of the water tank, two liquid outlet ends of the three-way pipe are respectively sleeved with an electric control valve, the filtering unit comprises a filtering barrel arranged in the water tank, the inner wall of the filtering barrel is fixedly connected with a microfiltration cover, and the microfiltration cover is fixedly connected with a liquid outlet of the three-way pipe. One end of the filtering barrel is fixedly communicated with a two-way pipe, the two ends of the two-way pipe are sleeved with electromagnetic valves, the liquid supply unit is communicated with one end of the two-way pipe and used for conveying biogas slurry into the filtering barrel, and the driving unit and the flushing unit are arranged in the water tank. According to the utility model, the biogas slurry is efficiently filtered by utilizing the filter vat and the microporous filter casing, and during back flushing, the driving unit can enable the filter vat to deflect, so that the flushing unit flushes the filter vat and the microporous filter casing which are in an inclined state, impurities in the filter vat are discharged, and the residual of the impurities in the filter vat is prevented.

Description

Technical Field

[0001] This utility model relates to the field of microfiltration equipment technology, and in particular to a high-efficiency microfiltration equipment for biogas slurry in dairy farms. Background Technology

[0002] The main function of microfiltration equipment is to remove suspended solids and impurities from biogas slurry and improve water quality. Dairy farms produce a liquid mixture of cow manure, urine, and flushing water after fermentation, which is biogas slurry. When discharging biogas slurry, microfiltration equipment is needed to separate the solids and liquids, remove impurities, and purify the water to meet the needs of subsequent resource utilization or compliant discharge.

[0003] Rotary drum microfiltration machines can efficiently trap suspended particles, microorganisms, and other tiny substances in biogas slurry. During operation, the backwashing structure typically uses nozzles to spray and wash the outer wall of the filter barrel from above. The impact force of the water flow causes impurities adhering to the inner wall of the filter barrel to fall off and then converge towards the axis of the filter barrel under gravity, eventually falling into the collection hood at the axis of the filter barrel and being discharged. However, during the backwashing operation, some larger and less viscous impurities tend to settle at the bottom of the filter barrel with the water and are difficult to adhere to the barrel wall when the filter barrel rotates. This results in impurities remaining in the barrel after backwashing, which may lead to problems such as microbial growth. Therefore, a high-efficiency microfiltration device for biogas slurry in dairy farms is proposed. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problems existing in the current high-efficiency microfiltration equipment for biogas slurry in dairy farms, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a high-efficiency microfiltration device for biogas slurry in dairy farms. It is suitable for solving the problem that when backwashing the filter cartridge of a rotary drum microfilter, some impurities with larger mass and lower viscosity are easily deposited at the bottom of the filter cartridge with the water and are difficult to adhere to the barrel wall when the filter cartridge rotates. This results in impurities remaining in the barrel after backwashing, which may lead to the growth of microorganisms.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-efficiency microfiltration device for biogas slurry in dairy farms, comprising:

[0008] The processing unit includes a water tank and a three-way pipe fixedly connected to the bottom of the water tank, and both liquid outlet ends of the three-way pipe are fitted with electrically controlled valves;

[0009] A filtration unit includes a filter barrel disposed in a water tank, a microporous filter cover fixedly connected to the inner wall of the filter barrel, a double-pass pipe fixedly connected to one end of the filter barrel, and a solenoid valve sleeved at both ends of the double-pass pipe.

[0010] A liquid supply unit connected to one end of the double-pass pipe is used to deliver biogas slurry into the filter bucket;

[0011] A drive unit and a flushing unit are installed inside the water tank. The drive unit is used to drive the filter barrel to perform rotational filtration and deflection flushing, and the flushing unit is used to backwash the deflected filter barrel.

[0012] As a preferred embodiment of the high-efficiency microfiltration device for biogas slurry in dairy farms described in this utility model, the bottom of the water tank is an isosceles trapezoid that tapers downward from the center, and the three-way pipe is located at the lowest point of the bottom of the water tank.

[0013] As a preferred embodiment of the high-efficiency microfiltration device for biogas slurry in dairy farms described in this utility model, the filter bucket is tapered towards one end of the double-pass pipe, and the double-pass pipe is located at the tapered end of the filter bucket.

[0014] As a preferred embodiment of the high-efficiency microfiltration device for biogas slurry in dairy farms described in this utility model, the liquid supply unit includes an L-shaped pipe that is sealed and rotatably connected to one end of a double-pass pipe. A rubber tube is fixedly connected to the top end of the L-shaped pipe. Two limiting rods are fixedly connected to the wall of the L-shaped pipe. Two arc-shaped grooves that fit the limiting rods are opened on the inner wall of the water tank. The two limiting rods are slidably disposed in the two arc-shaped grooves respectively.

[0015] As a preferred embodiment of the high-efficiency microfiltration device for biogas slurry in dairy farms described in this utility model, the top of the water tank is fixedly connected to a limiting cylinder, and the rubber tube slides through the limiting cylinder.

[0016] As a preferred embodiment of the high-efficiency microfiltration device for biogas slurry in dairy farms described in this utility model, the two ends of the limiting cylinder are tapered and expanded, and the openings at both ends of the limiting cylinder are provided with smooth transition curved surfaces.

[0017] As a preferred embodiment of the high-efficiency microfiltration device for biogas slurry in dairy farms described in this utility model, the drive unit includes a servo motor fixedly installed on one side of the water tank. A gate-shaped plate is provided inside the water tank. The two sides of the gate-shaped plate are rotatably connected to the two sides of the inner wall of the water tank through rotating columns. The output end of the servo motor rotatably passes through the water tank and is coaxially fixed with one of the rotating columns. A drive motor is fixedly installed on one side of the gate-shaped plate. The output end of the drive motor rotatably passes through the gate-shaped plate and is fixed to one end of the filter barrel.

[0018] As a preferred embodiment of the high-efficiency microfiltration device for biogas slurry in dairy farms described in this utility model, the flushing unit includes a water inlet pipe fixedly connected to the inner wall of the water tank. The water inlet pipe is inclined and one end extends to the outside of the water tank. Multiple nozzles are fixedly connected to the pipe wall of the water inlet pipe.

[0019] The beneficial effects of this utility model are as follows: the liquid supply unit can deliver biogas slurry into the filter barrel, so that the biogas slurry can be filtered efficiently by the filter barrel and the microporous filter cover. After filtration, when backwashing is performed, the drive unit can deflect the filter barrel and the microporous filter cover, so that the flushing unit can flush the filter barrel and the microporous filter cover in the tilted state, so that the impurities in the filter barrel can be discharged through the double-pass pipe, which can effectively prevent the internal impurities from remaining. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0021] Figure 1 This is a schematic diagram of the overall structure of the high-efficiency microfiltration device for biogas slurry in dairy farms proposed in this utility model;

[0022] Figure 2 This is a cross-sectional internal structure diagram of the water tank and filter barrel proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the disassembled structure of the filter barrel and microporous filter cover proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the flushing unit structure proposed in this utility model. Attached image description:

[0026] 100. Processing unit; 101. Water tank; 102. T-pipe;

[0027] 200. Filter unit; 201. Filter barrel; 202. Microporous filter cover; 203. Dual-pass pipe;

[0028] 300. Liquid supply unit; 301. L-shaped tube; 302. Rubber tube; 303. Limiting rod; 304. Arc-shaped slide groove; 305. Limiting cylinder;

[0029] 400. Drive unit; 401. Servo motor; 402. Door-shaped plate; 403. Rotating column; 404. Drive motor;

[0030] 500, Flushing unit; 501, Water inlet pipe; 502, Sprayer head. Detailed Implementation

[0031] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0032] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single embodiment or an embodiment selectively excluded from other embodiments.

[0034] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0035] Example 1

[0036] Reference Figures 1-4 The first embodiment of this utility model provides a high-efficiency microfiltration device for biogas slurry in dairy farms, which can deflect and rinse the filter barrel and microporous filter cover to facilitate the discharge of all impurities in the filter barrel and prevent the internal impurities from remaining. It includes: a processing unit 100, a filtration unit 200, a liquid supply unit 300, a drive unit 400 and a rinsing unit 500.

[0037] The processing unit 100 includes a water tank 101 and a three-way pipe 102 fixedly connected to the bottom of the water tank 101. Both liquid outlet ends of the three-way pipe 102 are fitted with electrically controlled valves.

[0038] The filter unit 200 includes a filter barrel 201 disposed in the water tank 101. A microporous filter cover 202 is fixedly connected to the inner wall of the filter barrel 201. A double-pass pipe 203 is fixedly connected to one end of the filter barrel 201. Solenoid valves are sleeved on both ends of the double-pass pipe 203.

[0039] A liquid supply unit 300 is connected to one end of the double-pass pipe 203. The liquid supply unit 300 is used to deliver biogas slurry into the filter bucket 201.

[0040] The drive unit 400 and the flushing unit 500 are installed in the water tank 101. The drive unit 400 is used to drive the filter barrel 201 to perform rotational filtration and deflection flushing, and the flushing unit 500 is used to backwash the deflected filter barrel 201.

[0041] The liquid supply unit 300 delivers biogas slurry into the filter bucket 201 through the double-pass pipe 203. The end of the double-pass pipe 203 not connected to the liquid supply unit 300 is closed by a solenoid valve. After the drive unit 400 is started, the filter bucket 201 rotates horizontally. Under the action of centrifugal force, the biogas slurry is filtered by the microporous filter cover 202. The filtered liquid is discharged through the filter holes of the filter bucket 201, while impurities are trapped in the filter bucket 201 for solid-liquid separation. The filtrate flows into the bottom of the water tank 101. One end of the three-way pipe 102 is connected to the drain pipe, and the other end is connected to the sewage pipe. The opening and closing of both ends of the three-way pipe 102 is controlled by an electric control valve. The filtered liquid is discharged through the drain pipe.

[0042] After filtration, the drive unit 400 drives the filter barrel 201 to tilt downwards at the end connected to the double-pass pipe 203. At the same time, the solenoid valve of the double-pass pipe 203 switches the circuit, and the solenoid valve of the three-way pipe 102 connected to the drain pipe is closed, while the solenoid valve connected to the sewage pipe is opened. Then, the flushing unit 500 sprays clean water or high-pressure water jet onto the surface of the filter barrel 201 to flush the tilted filter cover in the opposite direction. This causes the impurities attached to the inner wall of the filter barrel 201 and the microporous filter cover 202 to flow rapidly towards the double-pass pipe 203 under the action of water flow and gravity. The sewage and impurities are discharged through the end of the double-pass pipe 203 that is not connected to the liquid supply unit 300. Subsequently, the sewage flows into the water tank 101 and is discharged through the sewage pipe connected to the three-way pipe 102. By controlling the rotation and deflection of the filter barrel 201 by the drive unit 400, all impurities in the filter barrel 201 can be discharged. This not only improves the cleaning efficiency but also prevents impurities from remaining inside the filter barrel 201.

[0043] Example 2

[0044] Reference Figure 1 and Figure 2 This is the second embodiment of the present invention. Unlike the previous embodiment, the bottom of the water tank 101 is an isosceles trapezoid that tapers downward from the center, and the three-way pipe 102 is located at the lowest point of the bottom of the water tank 101.

[0045] The tapered design at the bottom of the water tank 101 allows the filtered biogas slurry to naturally converge to the position of the three-way pipe 102 under the action of gravity, thereby reducing residue and facilitating the control of biogas slurry discharge via the electronic control valve.

[0046] Specifically, the end of the filter barrel 201 facing the double-pass pipe 203 tapers in a conical shape, and the double-pass pipe 203 is located at the taper end of the filter barrel 201.

[0047] During the backwashing stage, the conical converging structure of the filter barrel 201 can reduce the deflection angle required by the drive unit 400. With only a deflection of fifty to sixty degrees, the conical inner wall can use the component of gravity to guide impurities to slide down the slope and be discharged through the double-pass pipe 203 at the end. This reduces the space required for the filter barrel 201 to flip and compresses the volume of the water tank 101.

[0048] Example 3

[0049] Reference Figure 1 and Figure 2 This is the third embodiment of the present invention. Unlike the previous embodiment, the liquid supply unit 300 includes an L-shaped tube 301 that is rotatably connected to one end of the double-pass tube 203. A rubber tube 302 is fixedly connected to the top end of the L-shaped tube 301. Two limiting rods 303 are fixedly connected to the wall of the L-shaped tube 301. Two arc-shaped grooves 304 that fit the limiting rods 303 are opened on the inner wall of the water tank 101. The two limiting rods 303 are slidably disposed in the two arc-shaped grooves 304 respectively.

[0050] The biogas slurry is transported through the rubber hose 302 to the L-shaped pipe 301, and then flows into the double-pass pipe 203. The L-shaped pipe 301 and the double-pass pipe 203 are sealed together by a rotary joint. The limiting rod 303 is used to prevent the L-shaped pipe 301 from rotating with the double-pass pipe 203. The arc-shaped chute 304 is designed with the inclined rotation axis of the filter barrel 201 as the center. When the drive unit 400 drives the filter barrel 201 to deflect to an inclined state for backwashing, the limiting rod 303 can drive the L-shaped pipe 301 to slide along the arc-shaped chute 304.

[0051] In addition, a limiting cylinder 305 is fixedly connected to the top of the water tank 101, and the rubber tube 302 slides through the limiting cylinder 305. The limiting cylinder 305 fixed to the top of the water tank 101 plays a guiding and restraining role for the rubber tube 302.

[0052] When the filter bucket 201 is tilted to a tilted state or tilted back to its original position, the worker can use the limiting cylinder 305 to retract or extend the rubber hose 302 to prevent the rubber hose 302 from falling directly into the water tank 101, thereby causing poor flow of biogas slurry.

[0053] It should be noted that the two ends of the limiting cylinder 305 are tapered and expanded, and the openings at both ends of the limiting cylinder 305 are provided with smooth transition curved surfaces.

[0054] When the rubber tube 302 moves with the L-shaped tube 301, the conical structure of the limiting cylinder 305 can guide the rubber tube 302 to slide smoothly, and the smooth curved surface can reduce the frictional resistance between the rubber tube 302 and the limiting cylinder 305, thereby reducing the wear of the rubber tube 302.

[0055] Example 4

[0056] Reference Figures 1-4 This is the fourth embodiment of the present invention. Unlike the previous embodiment, the drive unit 400 includes a servo motor 401 fixedly installed on one side of the water tank 101. A gate-shaped plate 402 is provided inside the water tank 101. The two sides of the gate-shaped plate 402 are rotatably connected to the two sides of the inner wall of the water tank 101 through rotating columns 403. The output end of the servo motor 401 rotatably passes through the water tank 101 and is coaxially fixed with one of the rotating columns 403. A drive motor 404 is fixedly installed on one side of the gate-shaped plate 402. The output end of the drive motor 404 rotatably passes through the gate-shaped plate 402 and is fixed to one end of the filter barrel 201.

[0057] The drive motor 404 is used to drive the filter barrel 201 to rotate around its own axis, so that the biogas slurry in the filter barrel 201 can be separated into solid and liquid through the microporous filter cover 202 under the action of centrifugal force and gravity. The filtrate enters the bottom of the water tank 101. During backwashing, the servo motor 401 drives one of the rotating columns 403 to rotate, thereby driving the filter barrel 201 to deflect through the gate plate 402 and the drive motor 404, so as to deflect the filter barrel 201 to an inclined position.

[0058] In addition, the rinsing unit 500 includes a water inlet pipe 501 fixedly connected to the inner wall of the water tank 101. The water inlet pipe 501 is inclined and one end of the water inlet pipe 501 extends to the outside of the water tank 101. Multiple nozzles 502 are fixedly connected to the pipe wall of the water inlet pipe 501.

[0059] When the filter barrel 201 and the water inlet pipe 501 are aligned parallel to each other at an inclined position, the drive motor 404 drives the filter barrel 201 to rotate. External water is delivered to the nozzle 502 through the water inlet pipe 501 so that the microporous filter cover 202 is washed with high pressure by the inclined nozzle 502. This causes the impurities attached to the inner wall of the filter barrel 201 and the microporous filter cover 202 to be discharged from one end of the double-pass pipe 203 under the flushing of the water flow.

[0060] During use, when filtering, the biogas slurry is delivered to the double-pass pipe 203 via the rubber tube 302 and the L-shaped tube 301. The end of the double-pass pipe 203 not connected to the L-shaped tube 301 is closed by a solenoid valve, allowing the double-pass pipe 203 to deliver biogas slurry into the filter bucket 201. Then, the drive motor 404 drives the filter bucket 201 to rotate, so that the biogas slurry is filtered by the microporous filter cover 202 under the action of centrifugal force. The filtered liquid is discharged through the filter holes of the filter bucket 201, while impurities are trapped inside the filter bucket 201. The filtrate flows into the bottom of the water tank 101. One end of the three-way pipe 102 is connected to the drain pipe, and the other end is connected to the sewage pipe. The filtered liquid is discharged through the drain pipe. After filtration is completed, the servo motor 401 drives one of the rotating columns 403 to rotate, so as to deflect the filter bucket 201 to an inclined position. During this process, the limit rod 303 can drive the L-shaped tube 301 to slide along the arc-shaped slide groove 304.

[0061] When the filter barrel 201 and the inlet pipe 501 are aligned parallel to each other at an angle, the solenoid valve of the double-way pipe 203 switches its circuit, and the solenoid valve of the three-way pipe 102 connected to the drain pipe is closed, while the solenoid valve connected to the sewage pipe is opened. Then, the drive motor 404 continues to drive the filter barrel 201 to rotate, and external water is delivered to the nozzle 502 through the inlet pipe 501 to rinse the microporous filter cover 202, removing the water adhering to the filter barrel 201 and the microporous filter cover 202. Impurities on the wall are flushed out by the water flow from the end of the double-pass pipe 203 that is not connected to the L-shaped pipe 301. Then the sewage flows into the water tank 101 and is discharged through the drain pipe connected to the three-way pipe 102. After flushing, the inlet pipe 501 stops flushing, and the servo motor 401 deflects the filter bucket 201 to a horizontal position to complete the reset. Then the solenoid valve of the double-pass pipe 203 switches the passage again, and the solenoid valve of the three-way pipe 102 also switches the passage again to perform filtration again.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A high-efficiency microfiltration device for biogas slurry in dairy farms, characterized in that, include: The processing unit (100) includes a water tank (101) and a three-way pipe (102) fixedly connected to the bottom of the water tank (101), wherein both liquid outlet ends of the three-way pipe (102) are fitted with electrically controlled valves; The filter unit (200) includes a filter barrel (201) disposed in a water tank (101), a microporous filter cover (202) is fixedly connected to the inner wall of the filter barrel (201), and a double-pass pipe (203) is fixedly connected to one end of the filter barrel (201), and both ends of the double-pass pipe (203) are fitted with solenoid valves. A liquid supply unit (300) is connected to one end of the double-pass pipe (203), the liquid supply unit (300) being used to deliver biogas slurry into the filter bucket (201); A drive unit (400) and a flushing unit (500) are installed in the water tank (101). The drive unit (400) is used to drive the filter barrel (201) to perform rotational filtration and deflection flushing. The flushing unit (500) is used to backwash the deflected filter barrel (201).

2. The high-efficiency microfiltration equipment for biogas slurry in dairy farms according to claim 1, characterized in that: The bottom of the water tank (101) is an isosceles trapezoid that tapers downward from the center, and the three-way pipe (102) is located at the lowest point of the bottom of the water tank (101).

3. The high-efficiency microfiltration equipment for biogas slurry in dairy farms according to claim 1, characterized in that: The filter barrel (201) tapes towards the end of the double-pass pipe (203), and the double-pass pipe (203) is located at the tapered end of the filter barrel (201).

4. The high-efficiency microfiltration equipment for biogas slurry in dairy farms according to claim 3, characterized in that: The liquid supply unit (300) includes an L-shaped tube (301) that is rotatably connected to one end of a double-pass tube (203). A rubber tube (302) is fixedly connected to the top end of the L-shaped tube (301). Two limiting rods (303) are fixedly connected to the wall of the L-shaped tube (301). The inner wall of the water tank (101) has two arc-shaped grooves (304) that fit the limiting rods (303). The two limiting rods (303) are slidably disposed in the two arc-shaped grooves (304).

5. The high-efficiency microfiltration device for biogas slurry in dairy farms according to claim 4, characterized in that: The top of the water tank (101) is fixedly connected to a limiting cylinder (305), and the rubber tube (302) slides through the limiting cylinder (305).

6. The high-efficiency microfiltration device for biogas slurry in dairy farms according to claim 5, characterized in that: The two ends of the limiting cylinder (305) are tapered and expanded, and the openings at both ends of the limiting cylinder (305) are provided with smooth transition curved surfaces.

7. The high-efficiency microfiltration equipment for biogas slurry in dairy farms according to claim 4, characterized in that: The drive unit (400) includes a servo motor (401) fixedly installed on one side of the water tank (101). The water tank (101) is provided with a gate-shaped plate (402). The two sides of the gate-shaped plate (402) are rotatably connected to the two sides of the inner wall of the water tank (101) through rotating columns (403). The output end of the servo motor (401) rotates through the water tank (101) and is coaxially fixed with one of the rotating columns (403). A drive motor (404) is fixedly installed on one side of the gate-shaped plate (402). The output end of the drive motor (404) rotates through the gate-shaped plate (402) and is fixed to one end of the filter barrel (201).

8. The high-efficiency microfiltration device for biogas slurry in dairy farms according to claim 7, characterized in that: The rinsing unit (500) includes a water inlet pipe (501) fixedly connected to the inner wall of the water tank (101). The water inlet pipe (501) is inclined and one end of the water inlet pipe (501) extends to the outside of the water tank (101). Multiple nozzles (502) are fixedly connected to the pipe wall of the water inlet pipe (501).

Images