Discharging system for biogas fermentation

Abstract

The utility model belongs to the technical field of fermentation equipment, and particularly relates to a discharging system for biogas fermentation, which comprises a collecting device, an impurity removal device and a solid-liquid separation device, wherein the impurity removal device comprises a separation device, a sinking device and a standing device; the collecting device is sequentially connected with the separating device, the sinking device, the standing device and the solid-liquid separating device; the discharging system is simple in structure and convenient to install and overhaul, impurities are effectively discharged, other auxiliary equipment does not need to be additionally arranged, automatic material conveying and impurity removing can be achieved, and the production cost is saved; impurities in byproducts are effectively removed, the problems of blockage and abrasion of a solid-liquid separation device are avoided, the production cost is reduced, the production efficiency is improved, and the productivity is improved.

Description

Technical Field

[0001] This utility model belongs to the field of fermentation equipment technology, specifically relating to a biogas fermentation discharge system. Background Technology

[0002] Biogas fermentation is a biological reaction process that converts organic matter (such as agricultural waste and municipal solid waste) into biogas. In biogas fermentation, organic matter reacts in a fermenter. During the reaction, microorganisms decompose the organic matter, producing methane, carbon dioxide, and other organic compounds. These products can be collected and used as fuel, while the byproducts can be used as fertilizer.

[0003] After the byproducts are discharged from the fermentation tank, they undergo solid-liquid separation to obtain biogas slurry and biogas residue, which can be used as fertilizer or as raw materials for fertilizer production. However, the byproducts are prone to contain impurities, such as large particles like sand and gravel, which can easily cause wear and blockages in the solid-liquid separation equipment, leading to production stoppages and affecting normal production. This has a significant impact on manufacturing enterprises. At the same time, the wear and tear on the equipment necessitates frequent maintenance and replacement, which not only delays production and affects production efficiency but also increases costs. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model proposes a discharge system for biogas fermentation. This discharge system is simple, easy to install and maintain, effectively removes impurities, and does not require additional auxiliary equipment. It can automatically convey materials and remove impurities, saving production costs. The effective removal of impurities in the by-products avoids the problems of clogging and wear of the solid-liquid separation device, reduces production costs, improves production efficiency, and increases production capacity.

[0005] The technical solution of this utility model is as follows:

[0006] A biogas fermentation discharge system includes a collection device, a removal device, and a solid-liquid separation device. The collection device is connected to the fermentation system. The removal device includes a separation device, a settling device, and a settling device. The collection device is sequentially connected to the separation device, the settling device, the settling device, and the solid-liquid separation device.

[0007] The discharge system provided by this utility model first collects the byproducts from the biogas fermentation system's fermentation tank into a collection device. Large particles of impurities in the byproducts settle to the bottom of the collection device and are discharged through the impurity outlet at the bottom. The collection device also serves to remove impurities. The collection device then transports the byproducts through pipelines to a separation device. The byproducts pass through a separation device, a settling device, and a settling device to remove impurities such as sand and gravel from the material. Then, the byproducts enter a solid-liquid separation device to obtain biogas residue and biogas slurry, which can be used as fertilizer or as raw materials for fertilizer production. By removing impurities from the byproducts, this system avoids problems such as wear and blockage of the solid-liquid separation device caused by impurities, effectively avoiding production stoppages and equipment maintenance and replacement, effectively improving production capacity and reducing production costs. The impurity removal device in this system removes impurities of different particle sizes (large, medium, and small) from the byproducts in a three-stage process, removing impurities to the greatest extent possible.

[0008] Preferably, the discharge port of the collecting device is connected to the inlet of the separating device through a pipe. Valves are installed near both the collecting device and the separating device. The discharge port of the collecting device is higher than the inlet of the separating device. The valves can control the flow of materials and facilitate the inspection and maintenance of the equipment. The fact that the discharge port of the collecting device is higher than the inlet of the separating device makes it easier for the material in the collecting device to flow automatically into the separating device.

[0009] More preferably, the discharge port of the collecting device is located above the collecting device, and the impurity outlet is located at the bottom of the collecting device. The inlet of the separating device is located below the separating device, and the discharge port of the separating device is located above the separating device. The impurity outlet is located at the bottom of the separating device. The separating device discharges impurities in the by-products through the impurity outlet at the bottom and discharges the material into the settling device through the discharge port at the top of the separating device. The collecting device is connected to a compressed air pipe, and gas is input into the collecting device through the compressed air pipe, which facilitates the flow of by-products in the collecting device into the separating device.

[0010] More preferably, the separation device is a spiral separation chamber, which is a hollow cylinder. An internal connecting shaft is installed within the spiral separation chamber, and multiple stages of spiral blades are mounted on the connecting shaft. There are gaps between each stage of spiral blades, and each stage of spiral blades consists of two fan blades that spiral upwards along the connecting shaft. The two fan blades are centrally symmetrical, with gaps between them. The material exiting the collection device has significant pressure. When this material enters the lower part of the separation device, the material with high pressure rises along the spiral blades, generating centrifugal force that separates impurities. This device achieves impurity separation through the material's own pressure and the spiral blades, without the need for additional equipment, effectively saving costs. If a conventional centrifuge is used, the presence of fibers in the byproducts can clog the centrifuge, and additional equipment needs to be powered on to operate, increasing costs. However, choosing a spiral separation chamber effectively avoids these problems of clogging and increased costs.

[0011] Preferably, the separation device is connected to the settling device via a pipe with a valve installed on the pipe. The discharge port of the separation device is higher than the inlet of the settling device, and the bottom of the settling device has an impurity outlet. The material from the separation device can automatically flow into the settling device. The material from the separation device also carries a large pressure as it enters the settling device. During this process, larger particles of impurities will enter the bottom of the settling device more quickly. By utilizing the large pressure of the material falling from a height, the impurities can be separated automatically and quickly. Compared with simple static separation, the time is effectively shortened. The impurities are discharged through the impurity outlet at the bottom of the settling device.

[0012] Preferably, an inverted U-shaped tube is installed in both the sinking device and the settling device. One end of the inverted U-shaped tube is placed in the sinking device, and the other end is placed in the settling device. The material is conveyed to the settling device through the inverted U-shaped tube using the siphon principle. The feed end of the inverted U-shaped tube is located in the lower middle position of the sinking device. The siphon principle effectively transfers the material, and impurities settle at the bottom of the sinking device and will not enter the settling device through the inverted U-shaped tube. The inverted U-shaped tube itself can also block some impurities from entering.

[0013] Preferably, a high level gauge is installed above the settling device and a low level gauge is installed below the settling device. The design of the high level gauge and the low level gauge ensures the normal operation of production and avoids problems such as safety accidents.

[0014] More preferably, the high-level gauge and the low-level gauge are electrically connected to the control system, and the valve on the pipeline connecting the collecting device and the separating device near the separating device is electrically connected to the control system. The control system adopts a PLC control system. In actual production, after the high-level gauge detects a signal, it feeds the signal back to the PLC control system. The PLC control system controls the valve to close, stopping the feeding of material into the separating device. When the low-level gauge detects a signal, it feeds the signal back to the PLC control system. The PLC control system controls the valve to open, feeding material into the separating device.

[0015] Preferably, the settling device is connected to the solid-liquid separation device through a pipeline with a valve installed on the pipeline. The discharge port of the settling device is higher than the inlet of the solid-liquid separation device. The discharge port of the settling device is located at the bottom, higher than the bottom of the settling device, so that the material can automatically flow into the solid-liquid separation device, causing impurities to settle at the bottom and not be discharged into the solid-liquid separation device through the discharge port.

[0016] Preferably, a manhole is provided on the top of the settling device, which is convenient for maintenance and for removing impurities through the manhole. A manhole is provided on the side wall of the separation device, which is convenient for equipment maintenance.

[0017] This utility model provides a biogas fermentation discharge system with a simple structure and convenient installation and maintenance. The system uses a three-stage impurity removal device to efficiently remove impurities from the by-products. Moreover, the impurity removal device does not require additional auxiliary equipment or electricity to automatically convey materials and remove impurities, saving production costs. The effective removal of impurities from the by-products avoids the problems of clogging and wear of the solid-liquid separation device, reduces production costs, improves production efficiency, and increases production capacity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the sinking device and the stationary device of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the spiral blade of this utility model;

[0021] In the diagram, 1 is the collecting device, 2 is the connecting shaft, 3 is the separating device, 4 is the fan blade, 5 is the inverted U-shaped tube, 6 is the settling device, 7 is the high liquid level gauge, 8 is the low liquid level gauge, 9 is the solid-liquid separation device, 10 is the sinking device, 11 is the manhole, and 12 is the compressed air pipe. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0023] like Figure 1-3 As shown, the present invention provides a biogas fermentation discharge system, including a collection device 1, a removal device and a solid-liquid separation device 9. The collection device 1 is connected to the fermentation tank in the fermentation system. The removal device includes a separation device 3, a settling device 10 and a settling device 6. The collection device 1 is connected in sequence to the separation device 3, the settling device 10, the settling device 6 and the solid-liquid separation device 9.

[0024] The discharge system provided by this utility model first collects the by-products from the biogas fermentation system's fermentation tank into the collection device 1. Large particles of impurities in the by-products in the collection device 1 settle to the bottom and are discharged through the impurity outlet at the bottom. The collection device 1 also serves to remove impurities. The collection device 1 then sends the by-products through a pipeline into the separation device 3. The by-products pass through the separation device 3, the settling device 10, and the settling device 6 to remove impurities such as sand and gravel from the material. Then, the by-products are transported to the solid-liquid separation device 9 to obtain biogas residue and biogas slurry, which can be used as fertilizer or as raw materials for fertilizer production. By removing impurities from the by-products, this system avoids problems such as wear and blockage of the solid-liquid separation device 9, effectively avoiding production stoppages and equipment maintenance and replacement, effectively improving production capacity and reducing production costs. The impurity removal device in this system removes impurities of different particle sizes (large, medium, and small) from the by-products in a three-stage process, removing impurities to the greatest extent possible.

[0025] In another embodiment, the outlet of the collecting device 1 is connected to the inlet of the separating device 3 via a pipe. Valves are installed near both the collecting device 1 and the separating device 3. The outlet of the collecting device 1 is higher than the inlet of the separating device 3. The valves control the material flow and facilitate equipment inspection and maintenance. The fact that the outlet of the collecting device 1 is higher than the inlet of the separating device 3 allows the material from the collecting device 1 to automatically flow into the separating device 3. The outlet of the collecting device 1 is located at the top of the collecting device 1, and an impurity outlet is located at the bottom of the collecting device 1. The feed inlet of the separator 3 is located at the bottom, and the discharge outlet is located at the top. An impurity outlet is located at the bottom of the separator 3. The separator 3 discharges impurities from the byproducts through the bottom impurity outlet and discharges the material into the settling device 10 through the top discharge outlet. The collecting device 1 is connected to a compressed air pipe 12, which is connected to an air compressor. Gas is supplied to the collecting device 1 through the compressed air pipe 12, facilitating the flow of byproducts from the collecting device 1 into the separator 3. The separator 3 is a spiral separator chamber, which is a hollow circle. The cylindrical spiral separator has an internal connecting shaft 2. The top and bottom of the connecting shaft 2 are fixedly connected to the spiral separator via connectors. The connecting shaft 2 has multiple stages of spiral blades, which are welded to the connecting shaft 2. There are gaps between each stage of spiral blades. Each stage of spiral blades consists of two fan blades 4, with gaps between the fan blades 4 and the outer wall. The fan blades 4 spiral upwards along the connecting shaft 2, and the two fan blades 4 are centrally symmetrical (the two fan blades 4 are centrally symmetrical about the center of the connecting shaft 2). There are gaps between the two fan blades 4. The material exiting the collection device 1 has a relatively high pressure, at which point the material enters... The material, which is under high pressure, rises along the spiral blades below the separator 3, forming centrifugal force that separates impurities. This device achieves impurity separation without the need for additional equipment, thanks to the pressure of the material itself and the spiral blades, effectively saving costs. If a conventional centrifuge is used, the presence of fibers in the byproducts can clog the centrifuge, and additional equipment needs to be powered on to achieve the desired result, increasing costs. However, choosing a spiral separator effectively avoids the problems of clogging and increased costs.

[0026] In another embodiment, the distance between each level of spiral blades is 50cm, and at least three levels of spiral blades are provided, with each level of spiral blade rotating 60° counterclockwise relative to the next level blade.

[0027] In another embodiment, the separating device 3 is connected to the sinking device 10 via a pipe. A valve is installed on the pipe. The outlet of the separating device 3 is higher than the inlet of the sinking device 10. An impurity outlet is provided at the bottom of the sinking device 10. The material coming out of the separating device 3 can automatically flow into the sinking device 10. The material in the separating device 3 also carries a large pressure and enters the sinking device 10. During this process, larger particles of impurities will enter the bottom of the sinking device 10 more quickly. By using the material with a large pressure falling from a height, the impurities can be separated quickly and automatically. Compared with simple static separation, the time is effectively shortened. The impurities are discharged through the impurity outlet at the bottom of the sinking device 10.

[0028] In another embodiment, an inverted U-shaped tube 5 is provided in the sinking device 10 and the settling device 6. One end of the inverted U-shaped tube 5 is placed in the sinking device 10, and the other end is placed in the settling device 6. One end of the inverted U-shaped tube 5 is placed in the sinking device 10, and the other end passes through the side wall of the sinking device 10 and the settling device 6 and is placed in the settling device 6. The inverted U-shaped tube 5 is fixedly connected to the settling device 6 and the sinking device 10. When the settling device 6 and the sinking device 10 share a side wall, the inverted U-shaped tube 5 is fixedly connected to the side wall. The material is fed into the settling device 6 through the inverted U-shaped tube 5 using the siphon principle. The feed end of the inverted U-shaped tube 5 is located in the lower middle position of the sinking device 10. The siphon principle effectively transfers the material, and impurities settle at the bottom of the sinking device 10 and will not enter the settling device 6 through the inverted U-shaped tube 5. The inverted U-shaped tube 5 itself can also block some impurities from entering.

[0029] In another implementation, a high-level gauge 7 is installed above the settling device 6, and a low-level gauge 8 is installed below the settling device 6. The design of the high-level gauge 7 and the low-level gauge 8 ensures the normal operation of production and avoids safety accidents. The high-level gauge 7 and the low-level gauge 8 are electrically connected to the control system. The valve on the pipeline connecting the collecting device 1 and the separating device 3 near the separating device 3 is electrically connected to the control system. The air compressor is electrically connected to the control system. The control system adopts a PLC control system. In actual production, after the high-level gauge 7 detects a signal, the signal is fed back to the PLC control system. The PLC control system controls the valve to close, stops feeding material into the separating device 3, and stops the air compressor from working. When the low-level gauge 8 detects a signal, it feeds back to the PLC control system. The PLC control system controls the valve to open, and the air compressor starts working, starting to feed material into the separating device 3.

[0030] In another embodiment, the settling device 6 is connected to the solid-liquid separation device 9 via a pipe. A valve is installed on the pipe. The discharge port of the settling device 6 is higher than the inlet of the solid-liquid separation device 93. The discharge port of the settling device 6 is located at the bottom, higher than the bottom of the settling device 6, so that the material can automatically flow into the solid-liquid separation device 9, causing impurities to settle at the bottom and not be discharged into the solid-liquid separation device 9 through the discharge port. A manhole 11 is provided on the top of the settling device 6, which is convenient for maintenance and for removing impurities through the manhole 11. A manhole 11 is also provided on the side wall of the separation device 3, which is convenient for equipment maintenance.

[0031] In another embodiment, the solid-liquid separation device 9 is a screw extruder.

[0032] In actual production, after the equipment is installed and debugged, the collection device is first evacuated. The by-products (fermented slurry) from the fermentation tank in the biogas fermentation system are transported to the collection device 1 through pipelines. Then, the by-products flow into the separation device 3 through pipelines. The separation device 3 separates impurities, which can be discharged through the impurity outlet at the bottom of the separation device 3. The impurities at the bottom of the collection device 1 are also discharged through the impurity outlet at the bottom of the collection device 1. The impurities discharged from these two parts are large particles. The material (by-products) after impurity removal is transported to the settling device 10 through pipelines. Under the action of high-pressure material and falling from a height, the material is automatically separated, removing medium-sized impurities. The impurities can be discharged through the impurity outlet at the bottom of the settling device 10. The material is conveyed to the settling device 6 through the inverted U-shaped pipe 5 using the siphon principle. After settling, small particulate impurities settle to the bottom. The material after impurity removal flows to the solid-liquid separation device 9. After the manhole 11 is opened in the settling device 6, the small particulate impurities are removed. The material is separated into biogas slurry and biogas residue, which can be used as waste or raw material for fertilizer preparation. In order to ensure the safe and normal operation of the device, after the high liquid level gauge 7 in the settling device 6 detects a signal, the signal is fed back to the PLC control system. The PLC control system controls the valve to close, stops feeding into the separation device 3, and stops the air compressor. When the low liquid level gauge 8 detects a signal, it feeds back to the PLC control system. The PLC control system controls the valve to open, and the air compressor starts working, starting to feed into the separation device 3.

[0033] This utility model provides a biogas fermentation discharge system with a simple structure and convenient installation and maintenance. The system uses a three-stage impurity removal device to efficiently remove impurities from the by-products. Moreover, the impurity removal device does not require additional auxiliary equipment or electricity to automatically convey materials and remove impurities, saving production costs. The effective removal of impurities from the by-products avoids the problems of clogging and wear of the solid-liquid separation device, reduces production costs, improves production efficiency, and increases production capacity.

Claims

1. A biogas fermentation discharge system, characterized in that: It includes a collection device (1), a purification device and a solid-liquid separation device (9), and the collection device (1) is connected to the fermentation system; wherein, the purification device includes a separation device (3), a settling device (10) and a settling device (6); the collection device (1) is connected in sequence to the separation device (3), the settling device (10), the settling device (6) and the solid-liquid separation device (9).

2. The biogas fermentation discharge system according to claim 1, characterized in that: The outlet of the collecting device (1) is connected to the inlet of the separating device (3) through a pipe. Valves are installed on the pipe near both the collecting device (1) and the separating device (3). The outlet of the collecting device (1) is higher than the inlet of the separating device (3).

3. The biogas fermentation discharge system according to claim 2, characterized in that: The discharge port of the collecting device (1) is located above the collecting device (1), and the impurity outlet is located at the bottom of the collecting device (1). The inlet of the separating device (3) is located below the separating device (3), and the discharge port of the separating device (3) is located above the separating device (3). The impurity outlet is located at the bottom of the separating device (3). The collecting device (1) is connected to the compressed air pipe (12).

4. The biogas fermentation discharge system according to claim 3, characterized in that: The separation device (3) is a spiral separation chamber, which is a hollow cylinder. A connecting shaft (2) is set inside the spiral separation chamber. Multiple spiral blades are set on the connecting shaft (2). There is a gap between each spiral blade. Each spiral blade consists of two fan blades (4). There is a gap between the two fan blades (4). The fan blades (4) spiral up along the connecting shaft (2). The two fan blades (4) are centrally symmetrical.

5. The biogas fermentation discharge system according to claim 1, characterized in that: The separation device (3) is connected to the sinking device (10) through a pipe. The discharge port of the separation device (3) is higher than the inlet of the sinking device (10). An impurity outlet is provided at the bottom of the sinking device (10).

6. The discharging system for biogas fermentation according to claim 1, characterized in that: The sinking device (10) and the stationary device (6) are provided with an inverted U-shaped tube (5), one end of which is set in the sinking device (10) and the other end is set in the stationary device (6).

7. The biogas fermentation discharge system according to claim 1, characterized in that: A high level gauge (7) is installed above the settling device (6), and a low level gauge (8) is installed below the settling device (6).

8. The biogas fermentation discharge system according to claim 7, characterized in that: The high level gauge (7) and low level gauge (8) are electrically connected to the control system, and the valve on the pipeline connecting the collection device (1) and the separation device (3) near the separation device (3) is electrically connected to the control system.

9. The discharging system for biogas fermentation according to claim 1, characterized in that: The settling device (6) is connected to the solid-liquid separation device (9) through a pipe. The outlet of the settling device (6) is higher than the inlet of the solid-liquid separation device (9), and the outlet of the settling device (6) is located below.

10. The biogas fermentation discharge system according to claim 1, characterized in that: A manhole (11) is provided on the top of the stationary device (6).

Images