A solid-liquid separation device for biogas liquid production

Abstract

The utility model discloses a solid -liquid separation equipment for biogas liquid production field is applied to, through the setting of axle column and material distribution guide, after the staff is closed feeding port with the mixture of biogas residue and biogas liquid and is put into screen mesh bucket from feeding port, and start drive motor, make drive motor drive screen mesh bucket rotate, in this process, when the thickness of the biogas residue accumulation on the inner wall of screen mesh bucket is thicker under the adhesion of centrifugal force, the thicker biogas residue is lifted off screen mesh bucket along the material starting blade when passing through material distribution guide, the biogas residue that separates screen mesh bucket loses centrifugal force and falls under the influence of gravity, and under the guidance of material distribution guide, it moves to feeding port side, through the material distribution of material distribution guide, guide material, make the biogas residue be able to quickly, evenly dispersed in screen mesh bucket, form the suitable thickness, can improve the separation effect of biogas residue in biogas liquid, improve efficiency, reduce the time required for separating biogas liquid.

Description

Technical Field

[0001] This utility model relates to the field of biogas liquid production, and in particular to a solid-liquid separation device for biogas liquid production. Background Technology

[0002] Biogas slurry (i.e., fermentation liquid) contains abundant organic matter, mainly incompletely degraded organic matter, nutrients such as nitrogen, phosphorus, and potassium, and may also contain some dissolved gases (such as carbon dioxide). This liquid can be used as liquid fertilizer, rich in nutrients, and is commonly used in agriculture. In the production process of biogas slurry, after anaerobic fermentation, it needs to be separated into biogas, biogas residue (solid residue), and biogas liquid through a sedimentation tank or separation equipment to finally obtain biogas slurry.

[0003] Existing technology (patent document with publication number "CN209024391U") discloses a solid-liquid separation device for biogas slurry and biogas residue. This device includes a screen cylinder assembly, a spiral shaft assembly, and a support frame for supporting the screen cylinder assembly and the spiral shaft assembly. Both ends of the screen cylinder are fixed to bearings and are rotatably connected to the bearings. One end of the screen cylinder has a biogas slurry and biogas residue inlet, and the other end has a biogas residue outlet. The spiral shaft assembly has a biogas residue inlet, a biogas slurry outlet, and a solids discharge outlet. This solid-liquid separation device avoids the clogging caused by using biogas slurry in drip irrigation systems in greenhouses and polytunnels, and also avoids the formation of compacted crop leaves caused by using biogas slurry in precision sprayers.

[0004] Based on the above search and combined with existing technology, it was found that existing solid-liquid separation equipment (devices) mainly achieve solid-liquid separation through centrifugal force and / or extrusion. During the process of separating biogas slurry and biogas residue using centrifugal force, the biogas residue inside the screen bucket is prone to local accumulation and uneven distribution, which leads to a decrease in the separation efficiency of biogas residue at the accumulation point and requires extending the separation time. At the same time, the accumulation of biogas residue inside the screen bucket is also not conducive to the discharge of biogas residue after separation. Utility Model Content

[0005] The core of this invention lies in solving the problem of localized accumulation of biogas residue inside the screen bucket in existing technologies, which leads to a decrease in biogas residue separation efficiency at the accumulation points, by setting a stationary material distribution guide. Simultaneously, an auxiliary discharge mechanism is installed to accelerate the detachment of biogas residue, allowing it to be discharged from the slag outlet more quickly and improving overall processing efficiency.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A solid-liquid separation device for biogas production includes a screen barrel with a feeding port and a slag outlet at both ends, a biogas slurry collection sleeve rotatably fitted outside the screen barrel, a rotating connecting ring rotatably connecting the screen barrel and the biogas slurry collection sleeve, and a drive motor for driving the screen barrel to rotate. The biogas slurry collection sleeve and the drive motor are both fixed on a support.

[0008] A shaft is fixed to the outside of the biogas slurry collection sleeve by a connector. One end of the shaft rotates through one side of the screen barrel and extends into the screen barrel. Multiple material distribution guides are fixed on the periphery of the shaft inside the screen barrel. The multiple material distribution guides are all located on the upper part of the periphery of the shaft, and a gap is formed between the top of the material distribution guide and the inner wall of the periphery of the screen barrel. The edge of the material distribution guide is provided with a lifting blade that is inclined away from the periphery of the screen barrel.

[0009] By setting a stationary material distribution guide, the biogas residue adheres to the inner wall of the screen barrel during rotation due to centrifugal force. When the thickness is relatively large, the thicker biogas residue is scooped up and detached from the screen barrel along the lifting edge when passing through the material distribution guide. The biogas residue that has detached from the screen barrel loses centrifugal force and falls under its own gravity. Guided by the material distribution guide, it moves towards the feeding port. Through the material distribution and guiding of the material distribution guide, the biogas residue can be quickly and evenly dispersed in the screen barrel to form a suitable thickness, thereby improving the separation effect of biogas slurry in biogas residue, increasing efficiency, and reducing the time required for biogas slurry separation.

[0010] Furthermore, the material distribution guide is a "7"-shaped plate composed of a horizontal plate and an inclined plate. The horizontal plate of the material distribution guide extends in the same direction as the axis of the screen barrel. The inclined plate of the material distribution guide is inclined to the side away from the slag outlet, and the horizontal plate of the material distribution guide is an arc-shaped plate coaxially set with the screen barrel.

[0011] Furthermore, the width of the inclined plate of the material distribution guide near the periphery of the screen barrel is greater than the width of the inclined plate near the shaft column. A reinforcing support rod is fixed on the side of the inclined plate of the material distribution guide near the slag outlet, and the other end of the reinforcing support rod is fixed to the shaft column.

[0012] Furthermore, the connector includes a connecting ring, which is rotatably sleeved on one end of the shaft located outside the screen barrel, and the connecting ring is fixed to the end of the biogas slurry collection sleeve by a fixing rod.

[0013] Optionally, an auxiliary discharge mechanism is installed on the inner wall of the screen barrel. The auxiliary discharge mechanism is a telescopic structure. The length of the auxiliary discharge mechanism changes with the rotation speed of the screen barrel. The faster the screen barrel rotates, the shorter the length of the auxiliary discharge mechanism. When the length of the auxiliary discharge mechanism approaches the unretracted length, it collides with one of the material distribution guides and generates vibration, which drives the local part connecting the screen barrel and the auxiliary discharge mechanism to vibrate.

[0014] Furthermore, the auxiliary discharge mechanism includes a fixed sleeve, a sliding vibrating rod, a compression spring, and a rubber ball head. The fixed sleeve is fixed to the inner wall of the screen barrel. The sliding vibrating rod is slidably inserted into the fixed sleeve. One end of the sliding vibrating rod near the periphery of the screen barrel is elastically connected to the inner wall of the fixed sleeve near the periphery of the screen barrel through the compression spring. The other end of the sliding vibrating rod extends to the outside of the fixed sleeve and is fixedly fitted with a rubber ball head. The rotation path of the rubber ball head when it is away from the periphery of the screen barrel coincides with the position of the material distribution guide.

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] (1) This scheme, through the setting of the shaft column and the material distribution guide, after the staff puts the mixture of biogas residue and biogas slurry into the screen bucket from the feeding port, closes the feeding port and starts the drive motor, so that the drive motor drives the screen bucket to rotate. During this process, when the biogas residue is attached to the inner wall of the screen bucket due to centrifugal force and the accumulation is thick, the thicker biogas residue is scooped up and removed from the screen bucket along the lifting blade when passing through the material distribution guide. Since the material distribution guide is located on the upper part of the shaft column, the biogas residue that has been removed from the screen bucket loses centrifugal force and falls under its own gravity. Under the guidance of the material distribution guide, it moves towards the feeding port side. Since the screen bucket is placed at an angle and the slag outlet is located at the lower side, the biogas residue generally moves downward and accumulates under the original gravity. After the material distribution guide, the biogas residue can be quickly and evenly dispersed in the screen bucket to form a suitable thickness, thereby improving the separation effect of biogas slurry in biogas residue, increasing efficiency and reducing the time required to separate biogas slurry.

[0017] (2) This scheme uses an auxiliary discharge mechanism. When the screen barrel rotates, it drives the auxiliary discharge mechanism to rotate as well. The faster the screen barrel rotates, the greater the centrifugal force generated. When the screen barrel rotates faster, the sliding vibrating rod and the rubber ball head are subjected to centrifugal force to overcome the elastic force of the compression spring and contract into the fixed sleeve. This causes the rotation path of the rubber ball head to expand outward and move away from the material distribution guide. When the screen barrel rotates slower, the centrifugal force on the sliding vibrating rod and the rubber ball head decreases, and the elastic force of the compression spring causes the sliding vibrating rod and the rubber ball head to move towards the fixed sleeve. The movement of one side of the screen barrel's central axis causes the rotation path of the rubber ball head to narrow inward. When the rotation path of the rubber ball head coincides with the material distribution guide, the rubber ball head impacts the material distribution guide and generates vibration. The vibration force reacts on the sliding vibrating rod and the fixed sleeve, and is further transmitted to the periphery of the screen barrel, causing local vibration on the periphery of the screen barrel. This vibration causes the biogas residue attached to the periphery of the screen barrel to fall off, accelerating the detachment of the biogas residue and allowing it to be discharged from the slag outlet more quickly, thus improving the overall processing efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the material distribution guide structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the auxiliary discharge mechanism of this utility model.

[0022] Explanation of the labels in the diagram:

[0023] 1. Screen barrel; 11. Feeding port; 12. Slag outlet; 2. Biogas slurry collection sleeve; 21. Liquid outlet; 3. Rotating connecting ring; 4. Drive motor; 5. Shaft column; 6. Connecting ring; 7. Material distribution guide; 71. Lifting blade; 72. Reinforcing support rod; 8. Auxiliary discharge mechanism; 81. Fixed sleeve; 82. Sliding vibrating rod; 83. Compression spring; 84. Rubber ball head. Detailed Implementation

[0024] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0025] First implementation method:

[0026] Please see Figures 1-3 A solid-liquid separation device for biogas production includes a screen barrel 1 (the screen barrel 1 is composed of a mesh cylinder on the periphery and end plates at both ends, with the feeding port 11 and the slag outlet 12 located on the end plates at both ends), a biogas slurry collection sleeve 2 rotatably sleeved on the outside of the screen barrel 1, a rotating connecting ring 3 rotatably connecting the screen barrel 1 and the biogas slurry collection sleeve 2, and a drive motor 4 for driving the screen barrel 1 to rotate. The biogas slurry collection sleeve 2 and the drive motor 4 are both fixed on a bracket. The inner side of the rotating connecting ring 3 is fixed to the outer wall of the screen barrel 1, and the outer side of the rotating connecting ring 3 is rotatably connected to the inner wall of the biogas slurry collection sleeve 2.

[0027] A shaft column 5 is fixed to the outside of the biogas slurry collection sleeve 2 via a connector. One end of the shaft column 5 rotates through one side of the screen barrel 1 and extends into the screen barrel 1. Multiple material distribution guides 7 are fixed to the periphery of the shaft column 5 inside the screen barrel 1. The multiple material distribution guides 7 are all located on the upper part of the periphery of the shaft column 5, and a gap is formed between the top of the material distribution guide 7 and the periphery of the screen barrel 1. The edge of the material distribution guide 7 is provided with a lifting blade 71 that is inclined away from the periphery of the screen barrel 1.

[0028] Based on the above structure, after the worker puts the biogas residue and biogas slurry mixture into the screen bucket 1 through the feeding port 11 (the slag outlet 12 must be closed first), the feeding port 11 is closed, and the drive motor 4 is started, causing the drive motor 4 to drive the screen bucket 1 to rotate. During this process, when the biogas residue, due to centrifugal force, accumulates on the inner wall of the screen bucket 1 and becomes thick, the thicker biogas residue is scooped up and detached from the screen bucket 1 along the lifting blade 71 when passing through the material distribution guide 7. Since the material distribution guide 7 is located on the upper part of the shaft column 5, the biogas residue that has detached from the screen bucket 1 loses centrifugal force and is then lifted by its own gravity. The biogas residue falls downwards and moves towards the feeding port 11 under the guidance of the material distribution guide 7. Since the screen bucket 1 is placed at an angle and the slag outlet 12 is located at the opposite bottom, the biogas residue generally moves downwards and accumulates under the original gravity. After being distributed and guided by the material distribution guide 7, the biogas residue can be quickly and evenly dispersed in the screen bucket 1 to form a suitable thickness (this thickness is consistent with the distance between the upper end of the material distribution guide 7 and the upper end of the inner wall of the screen bucket 1), thereby improving the separation effect of biogas slurry in the biogas residue, increasing efficiency, and reducing the time required to separate biogas slurry.

[0029] In addition, the evenly distributed biogas residue is less likely to clump together into large masses during subsequent discharge, which is beneficial for the subsequent discharge of biogas residue.

[0030] Furthermore, the material distribution guide 7 is a “7” shaped plate composed of a horizontal plate and an inclined plate. The horizontal plate of the material distribution guide 7 extends in the same direction as the axis of the screen barrel 1. The inclined plate of the material distribution guide 7 is inclined to the side away from the slag outlet 12. The horizontal plate of the material distribution guide 7 is an arc-shaped plate coaxially arranged with the screen barrel 1.

[0031] The width of the inclined plate of the material distribution guide 7 near the screen barrel 1 is greater than the width of the inclined plate near the shaft column 5. A reinforcing support rod 72 is fixed on the side of the inclined plate of the material distribution guide 7 near the slag outlet 12, and the other end of the reinforcing support rod 72 is fixed to the shaft column 5.

[0032] The horizontal plate of the material distribution guide 7 can separate the accumulated biogas residue, and after the biogas residue is separated from the inner wall of the screen bucket 1, it slides down the inclined plate under its own gravity and inertia. Some of the biogas residue is directly scattered, thereby separating the accumulated biogas residue and spreading it evenly to other positions, so as to achieve the purpose of quickly and evenly dispersing the biogas residue in the screen bucket 1.

[0033] The reinforced support rod 72 enhances the stability of the material distribution guide 7. At the same time, the gradually narrowing design of the inclined plate helps the biogas residue to detach from the material distribution guide 7, reducing the probability of incomplete separation caused by the biogas residue adhering to the material distribution guide 7.

[0034] The connecting component includes a connecting ring 6, which is rotatably sleeved on one end of the shaft column 5 located outside the screen barrel 1. The connecting ring 6 is fixed to the end of the biogas slurry collection sleeve 2 by a fixing rod. Of course, the shaft column 5 is also connected to the screen barrel 1 by other connecting components to maintain the stability of the shaft column 5. For example, a sealed bearing and a rotating shaft seat are rotatably sleeved on the outside of the shaft column 5. The sealed bearing is fixed to the screen barrel 1 and located on the side of the screen barrel 1 near the feeding port 11, while the shaft seat is fixed to the inner wall of the end of the screen barrel 1 near the slag outlet 12.

[0035] Second implementation method:

[0036] Please see Figure 2 and Figure 4 A solid-liquid separation device for biogas liquid production, which differs from the first embodiment in that:

[0037] An auxiliary discharge mechanism 8 is installed on the inner wall of the screen barrel 1. The auxiliary discharge mechanism 8 is a telescopic structure. The length of the auxiliary discharge mechanism 8 changes with the rotation speed of the screen barrel 1. The faster the screen barrel 1 rotates, the shorter the length of the auxiliary discharge mechanism 8 becomes. When the length of the auxiliary discharge mechanism 8 approaches its unretracted length, it collides with one of the material distribution guides 7 and generates vibration, which drives the local area where the screen barrel 1 is connected to the auxiliary discharge mechanism 8 to vibrate.

[0038] Specifically, the auxiliary discharge mechanism 8 includes a fixed sleeve 81, a sliding vibrating rod 82, a compression spring 83, and a rubber ball head 84. The fixed sleeve 81 is fixed to the inner wall of the screen barrel 1. The sliding vibrating rod 82 is slidably inserted into the fixed sleeve 81. One end of the sliding vibrating rod 82 near the periphery of the screen barrel 1 is elastically connected to the inner wall of the fixed sleeve 81 near the periphery of the screen barrel 1 through the compression spring 83. The other end of the sliding vibrating rod 82 extends to the outside of the fixed sleeve 81 and is fixedly fitted with a rubber ball head 84. The rotation path of the rubber ball head 84 when it is away from the periphery of the screen barrel 1 coincides with the position of the material distribution guide 7.

[0039] When the screen barrel 1 rotates, it drives the auxiliary discharge mechanism 8 to rotate accordingly. The faster the screen barrel 1 rotates, the greater the centrifugal force generated. When the screen barrel 1 rotates faster, the sliding vibrating rod 82 and the rubber ball head 84 are overcoming the elastic force of the compression spring 83 and contracting into the fixed sleeve 81 under the action of centrifugal force. This causes the rotation path of the rubber ball head 84 to expand outward and move away from the material distribution guide 7. When the screen barrel 1 rotates slower, the centrifugal force on the sliding vibrating rod 82 and the rubber ball head 84 decreases, and the elastic force of the compression spring 83 causes the sliding vibrating rod 82 and the rubber ball head 84 to move into the screen barrel 1. The movement of the axis on one side causes the rotation path of the rubber ball head 84 to narrow inward. When the rotation path of the rubber ball head 84 coincides with the material distribution guide 7, the rubber ball head 84 impacts the material distribution guide 7 and generates vibration. The vibration force reacts on the sliding vibrating rod 82 and the fixed sleeve 81, and is further transmitted to the circumference of the screen barrel 1, causing the circumference of the screen barrel 1 to vibrate locally. This causes the biogas residue attached to the circumference of the screen barrel 1 to fall off due to the vibration, which can accelerate the detachment of biogas residue and allow it to be discharged from the slag outlet 12 more quickly, thereby improving the overall processing efficiency.

[0040] In addition, the material distribution guide 7 also vibrates when it is struck. The vibration force can cause a small amount (or trace amount) of biogas residue that may be attached to the material distribution guide 7 and the shaft column 5 to detach, ensuring the integrity of the discharged material.

[0041] In other embodiments, to ensure that the slag outlet 12 is always located at the bottom and to facilitate slag discharge, the end plate corresponding to the slag outlet 12 of the screen barrel 1 can be configured as a fixed plate and a ring that are rotatably fitted from the inside to the outside along the radial direction of the screen barrel 1. The fixed plate is fixed to the rotating shaft seat at the end of the shaft column 5, and the ring is fixed to the circumferential mesh cylinder of the screen barrel 1 (the cross section of the ring is the same as that of the mesh cylinder of the screen barrel 1, so the screen barrel 1 can be regarded as a rotating open cylinder and a stationary end plate). The slag outlet 12 is opened on the fixed plate, so that the slag outlet 12 is always located at the bottom to facilitate material discharge. Of course, those skilled in the art can also use other existing designs to realize the orientation design of the slag outlet 12, preferably to achieve rapid material discharge, which will not be described in detail here.

[0042] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A solid-liquid separation device for biogas production, comprising a screen barrel (1) with a feeding port (11) and a slag outlet (12) at both ends, a biogas slurry collection sleeve (2) rotatably fitted outside the screen barrel (1), a rotating connecting ring (3) rotatably connecting the screen barrel (1) and the biogas slurry collection sleeve (2), and a drive motor (4) for driving the screen barrel (1) to rotate, wherein the biogas slurry collection sleeve (2) and the drive motor (4) are both fixed on a support, characterized in that: The biogas slurry collection sleeve (2) is fixed with a shaft (5) on the outside by a connector. One end of the shaft (5) rotates through one side of the screen bucket (1) and extends into the screen bucket (1). Multiple material distribution guides (7) are fixed on the periphery of the shaft (5) inside the screen bucket (1). The multiple material distribution guides (7) are all located on the upper part of the periphery of the shaft (5), and a gap is formed between the top of the material distribution guide (7) and the periphery of the screen bucket (1). The edge of the material distribution guide (7) is provided with a lifting blade (71) that is inclined away from the periphery of the screen bucket (1).

2. The solid-liquid separation equipment for biogas liquid production according to claim 1, characterized in that: The material distribution guide (7) is a "7" shaped plate composed of a horizontal plate and an inclined plate. The horizontal plate of the material distribution guide (7) extends in the same direction as the axis of the screen barrel (1). The inclined plate of the material distribution guide (7) is inclined to the side away from the slag outlet (12). The horizontal plate of the material distribution guide (7) is an arc-shaped plate coaxially arranged with the screen barrel (1).

3. The solid-liquid separation equipment for biogas liquid production according to claim 2, characterized in that: The width of the inclined plate of the material distribution guide (7) near the screen barrel (1) is greater than the width of the inclined plate near the shaft column (5). A reinforcing support rod (72) is fixed on the side of the inclined plate of the material distribution guide (7) near the slag outlet (12). The other end of the reinforcing support rod (72) is fixed to the shaft column (5).

4. The solid-liquid separation equipment for biogas liquid production according to claim 1, characterized in that: The connector includes a connecting ring (6), which is rotatably sleeved on one end of the shaft column (5) located outside the screen bucket (1). The connecting ring (6) is fixed to the end of the biogas slurry collection sleeve (2) by a fixing rod.

5. The solid-liquid separation equipment for biogas liquid production according to claim 1, characterized in that: An auxiliary discharge mechanism (8) is installed on the inner wall of the screen barrel (1). The auxiliary discharge mechanism (8) is a telescopic structure. The length of the auxiliary discharge mechanism (8) changes with the rotation speed of the screen barrel (1). The faster the screen barrel (1) rotates, the shorter the length of the auxiliary discharge mechanism (8). When the length of the auxiliary discharge mechanism (8) approaches the unretracted length, it collides with one of the material distribution guides (7) and generates vibration, causing the local part connected to the screen barrel (1) and the auxiliary discharge mechanism (8) to vibrate.

6. A solid-liquid separation device for biogas liquid production according to claim 5, characterized in that: The auxiliary discharge mechanism (8) includes a fixed sleeve (81), a sliding vibrating rod (82), a compression spring (83), and a rubber ball head (84). The fixed sleeve (81) is fixed to the inner wall of the screen barrel (1). The sliding vibrating rod (82) is slidably inserted into the fixed sleeve (81). One end of the sliding vibrating rod (82) near the periphery of the screen barrel (1) is elastically connected to the inner wall of the fixed sleeve (81) near the periphery of the screen barrel (1) through the compression spring (83). The other end of the sliding vibrating rod (82) extends to the outside of the fixed sleeve (81) and is fixedly fitted with a rubber ball head (84). The rotation path of the rubber ball head (84) when it is away from the periphery of the screen barrel (1) coincides with the position of the material distribution guide (7).

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