Efficient high-solid-content biogas slurry pneumatic discharging device
By using anti-reflow elbows and anti-blocking vacuum tubes in the pneumatic liquid discharge device, the problems of high solid content liquid discharge resistance and pipeline blockage are solved, and an efficient and safe liquid discharge process is achieved, reducing operating costs.
Patent Information
- Application Number
- CN202422195565.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In the prior art, during the pneumatic discharge process of high solid content liquid, the feed pipeline path is long, the resistance of the liquid entering the storage tank is large, the operation cost is high, and the pumping time is too long can easily lead to pipeline blockage and equipment damage.
A high-efficiency high-solid content pneumatic liquid pneumatic discharge device is designed, using anti-reflow elbows and anti-blocking vacuum tubes to shorten the length of the feed tube, and automatically flow into the storage tank using the liquid level difference to prevent the return of the liquid, and avoid the pipeline blockage by thickening the anti-blocking vacuum tubes.
It realizes automatic discharge of materials without external force, reduces operating costs, ensures equipment safety, prevents pipeline blockage, and improves discharge efficiency.
Smart Images
Figure CN223118445U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of biogas production, in particular to a pneumatic discharging device for high-efficiency and high-solid-content biogas slurry. Background Art
[0002] The biogas produced by biomass fermentation is a green, low-carbon, clean and renewable energy source. At present, when the solid content in the biogas slurry is relatively high, a feed pipe is arranged through the fermentation tank and extends to the bottom of the fermentation tank, and the other end of the feed pipe is connected to a storage tank. By means of pneumatic discharging by pumping air from the storage tank, the biogas slurry is pumped out from the bottom of the fermentation tank to the storage tank. To prevent the biogas slurry from flowing back into the fermentation tank during pressurized discharging, a valve must be set on the feed pipeline. To facilitate the installation of the valve, the feed pipeline must first rise outside the fermentation tank and then turn to enter the storage tank. The path of the intake pipeline is relatively long, the resistance of the biogas slurry entering the storage tank is relatively large, the required air pumping time is relatively long, and the operation cost is greatly increased. Moreover, the negative pressure degree and the air pumping time must be strictly controlled during air pumping. Once the air pumping time is too long and the negative pressure degree is too high, the biogas slurry will be pumped into the air pumping pipeline and then enter the subsequent equipment, resulting in blockage of the air pumping pipeline and damage to the subsequent equipment. Content of the Utility Model
[0003] Aiming at the deficiencies of the prior art, the utility model provides a pneumatic discharging device for high-efficiency and high-solid-content biogas slurry. The feed pipe is provided with an anti-backflow elbow, and the biogas slurry can automatically flow into the storage tank, and at the same time, the problem that the biogas slurry flows back into the fermentation tank from the feed pipe during discharging is solved. The air extraction pipe is raised upward through an anti-blocking vacuum pipe. If the air extraction time is too long, the biogas slurry stays in the anti-blocking vacuum pipe and cannot directly enter the subsequent equipment, so that the personnel have enough reaction time, thus ensuring the safety of the subsequent equipment. And the anti-blocking vacuum pipe is thickened. Even if the biogas slurry is pumped into the anti-blocking vacuum pipe, after the biogas slurry in the storage tank is discharged, the biogas residue adhered to the inside of the anti-blocking vacuum pipe will not block the pipeline and does not affect the use.
[0004] The utility model is realized by the following technical scheme: a pneumatic discharging device for high-efficiency and high-solid-content biogas slurry, including a fermentation tank and a storage tank. The storage tank is fixedly arranged inside the fermentation tank, and the top of the storage tank extends to the outside of the fermentation tank. The top of the storage tank is provided with a feed pipe, a discharge pipe and a vacuum extraction pipe. The lower end of the feed pipe penetrates through the storage tank and extends into the fermentation tank. An anti-backflow elbow is arranged on the pipe body of the feed pipe inside the storage tank. The upper end of the feed pipe is communicated with a ventilation pipe and a pressurization pipe, and a relief valve and an intake valve are respectively installed on the ventilation pipe and the pressurization pipe. The lower end of the discharge pipe extends into the storage tank, and a discharge valve is installed at the upper end of the discharge pipe. An air extraction valve is installed on the vacuum extraction pipe.
[0005] In this solution, the storage tank is semi-buried inside the fermentation tank. The feed pipe is directly set to pass through the storage tank and enter the fermentation tank. The anti-backflow elbow connects the inner cavities of the fermentation tank and the storage tank, greatly shortening the length of the feed pipe. Without external force, due to the liquid level difference inside and outside the storage tank, the biogas slurry in the fermentation tank automatically flows into the storage tank, making the liquid levels inside and outside the storage tank level. At the same time, there is no need to set valves in the feed pipeline, reducing the operating cost. By pumping air through the extraction pipe, a negative pressure is formed inside the storage tank, so that the biogas slurry can further fill the storage tank. By introducing air through the pressurized pipeline to pressurize the storage tank, the biogas slurry is discharged from the discharge pipe.
[0006] As an optimization, an anti-blocking vacuum tube is provided at the top of the storage tank, and the upper end of the vacuum extraction pipe is connected to the anti-blocking vacuum tube. In this optimized solution, the anti-blocking vacuum tube raises the vacuum extraction pipe upward. Once the air extraction time is too long, the biogas slurry will stay in the anti-blocking vacuum tube and cannot directly enter the subsequent equipment, giving personnel enough reaction time to ensure the safe use of the subsequent equipment.
[0007] As an optimization, the height of the anti-blocking vacuum tube is 4 - 6m, and the diameter of the anti-blocking vacuum tube is 200 - 300mm. In this optimized solution, the anti-blocking vacuum tube is thickened. Even if some biogas slurry is pumped into the anti-blocking vacuum tube, after the biogas slurry in the storage tank is discharged, the biogas residue adhering to the inside of the anti-blocking vacuum tube will not block the pipeline and does not affect subsequent use.
[0008] As an optimization, the height of the storage tank is 5.5 - 6.5m, and the top of the storage tank is 1.0 - 1.5m higher than the top of the fermentation tank. In this optimized solution, when the storage tank is full of biogas slurry, the liquid level height at the top of the storage tank is higher than the liquid level height inside the fermentation tank, facilitating the discharge of the biogas slurry in the storage tank.
[0009] As an optimization, the anti-backflow elbow is located at the middle position inside the storage tank. In this optimized solution, the position of the anti-backflow elbow is lower than the liquid level of the biogas slurry inside the fermentation tank. Under the action of the pressure difference, the biogas slurry in the fermentation tank can automatically flow into the storage tank, making the biogas slurry levels inside and outside the storage tank equal.
[0010] As an optimization, the anti-backflow elbow includes a 90-degree elbow and an extension pipe fixedly connected to the lower port of the 90-degree elbow. In this optimized solution, the lower port of the 90-degree elbow is extended through the extension pipe, making the horizontal height of the lower end outlet of the anti-backflow elbow much lower than the horizontal height of the interface between the anti-backflow elbow and the feed pipe. When compressed air enters the storage tank from the anti-backflow elbow, it ensures that the biogas slurry in the storage tank cannot flow back to the feed pipeline.
[0011] As an optimization, the lower port of the discharge pipe is 0.3 - 0.7m away from the bottom of the storage tank. In this optimized solution, this distance can prevent some large substances in the biogas slurry from being clamped between the discharge pipe and the bottom of the storage tank, affecting the pipeline discharge.
[0012] As an optimization, the lower port of the feed pipe is 0.4 - 0.6 m away from the bottom of the fermentation tank. This distance in this optimization scheme can prevent some large substances in the biogas slurry from being clamped between the feed pipe and the bottom of the fermentation tank, affecting the pipeline feeding.
[0013] The beneficial effects of the present utility model are as follows: The storage tank is semi - buried inside the fermentation tank, and the inner cavities of the fermentation tank and the storage tank are connected through an anti - reflux elbow, greatly shortening the length of the feed pipe of the feed pipe. Without external force, due to the liquid level difference inside and outside the storage tank, the biogas slurry in the fermentation tank can automatically flow into the storage tank, making the liquid levels inside and outside the storage tank even. At the same time, there is no need to set a valve in the feed pipeline, reducing the operating cost. When discharging under pressure, through the anti - reflux elbow, it ensures that the biogas slurry in the storage tank flows out from the discharge pipe and prevents the biogas slurry from flowing back into the fermentation tank.
[0014] The anti - clogging vacuum tube raises the vacuum extraction pipeline upwards. Once the extraction time is too long, the biogas slurry will stay in the anti - clogging vacuum tube and cannot directly enter the subsequent equipment, giving personnel enough reaction time to ensure the safe use of the subsequent equipment. The anti - clogging vacuum tube is thickened. Even if some biogas slurry is pumped into the anti - clogging vacuum tube, after the biogas slurry in the storage tank is discharged, the biogas residue adhering to the inside of the anti - clogging vacuum tube will not block the pipeline and does not affect the subsequent use.
[0015] The lower port of the discharge pipe is 0.3 - 0.7 meters away from the bottom of the storage tank, which can discharge as much biogas slurry in the storage tank as possible while avoiding some large substances in the biogas slurry from blocking the discharge pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic structural diagram of the present utility model;
[0017] As shown in the figure:
[0018] 1. Fermentation tank, 2. Storage tank, 3. Feed pipe, 4. 90 - degree elbow, 5. Anti - clogging vacuum tube, 6. Discharge pipe, 7. Pressurization pipeline, 8. Intake valve, 9. Relief valve, 10. Vacuum extraction pipeline, 11. Extraction valve, 12. Discharge valve, 13. Vent pipe, 14. Extension pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] To clearly illustrate the technical features of this solution, the following elaborates on this solution through specific embodiments.
[0020] As Figure 1 shown, a pneumatic discharge device for biogas slurry with high efficiency and high solid content rate includes a fermentation tank 1 and a storage tank 2. The storage tank 2 is fixedly arranged inside the fermentation tank 1, and the top of the storage tank 2 extends to the outside of the fermentation tank 1. Specifically, the height of the storage tank 2 is 5.5 - 6.5 m, and the top of the storage tank 2 is 1.0 - 1.5 m higher than the top of the fermentation tank 1.
[0021] At the top of the storage tank 2, there are a feed pipe 3, a discharge pipe 6 and a vacuum extraction pipe 10. The feed pipe 3 extends vertically, and the lower end of the feed pipe 3 penetrates through the storage tank 2 and extends into the fermentation tank 1. Preferably, the lower port of the feed pipe 3 is 0.4 - 0.6 m away from the bottom of the fermentation tank 1. This distance can prevent some large substances in the biogas slurry from being caught between the feed pipe and the bottom of the fermentation tank, affecting the feeding of the feed pipe.
[0022] On the pipe body of the feed pipe 3 inside the storage tank 2, there is a reflux prevention elbow, and the reflux prevention elbow is located at the middle position inside the storage tank 2. In this embodiment, the reflux prevention elbow includes a 90-degree elbow 4 and an extension pipe 14 fixedly connected to the lower port of the 90-degree elbow 4. One port of the 90-degree elbow is connected to the feed pipe 3, and the other port of the 90-degree elbow is arranged downward. The extension pipe 14 is fixedly connected to the lower port of the 90-degree elbow, and the length of the extension pipe is 100 - 200 mm. By lengthening the lower port of the 90-degree elbow through the extension pipe 14, it is ensured that the horizontal height of the lower port of the reflux prevention elbow is lower than the height of the interface between the reflux prevention elbow and the feed pipe, so that there is a height difference between the two ports of the reflux prevention elbow. When compressed air enters the storage tank from the reflux prevention elbow, the biogas slurry in the storage tank cannot flow back to the feed pipeline.
[0023] The upper end of the feed pipe 3 is connected to a vent pipe 13 and a pressurization pipeline 7, and a relief valve 9 and an intake valve 8 are respectively installed on the vent pipe 13 and the pressurization pipeline 7. Specifically, the pressurization pipeline 7 extends vertically, the lower port of the pressurization pipeline 7 is connected to the upper port of the feed pipe 3, and the upper port of the pressurization pipeline 7 is connected to a pressurization device. In this embodiment, the pressurization device is an air compressor. The vent pipe 13 extends horizontally, one port of the vent pipe 13 is communicated with the pressurization pipeline 7, and the vent pipe 13 is located between the intake valve 8 and the upper port of the feed pipe 3.
[0024] The lower end of the discharge pipe 6 extends into the storage tank 2, and the horizontal height of the lower port of the discharge pipe 6 is lower than the horizontal height of the lower port of the reflux prevention elbow. A discharge valve 12 is installed at the upper end of the discharge pipe 6. In this embodiment, the discharge pipe 6 is a 90-degree elbow pipe, the vertical extension section of the 90-degree elbow pipe extends into the storage tank 2, and the discharge valve 12 is installed on the horizontal extension section of the 90-degree elbow pipe. Preferably, the lower port of the discharge pipe 6 is 0.3 - 0.7 m away from the bottom of the storage tank 2. This distance can prevent some large substances in the biogas slurry from being caught between the discharge pipe and the bottom of the storage tank, affecting the discharging of the pipeline.
[0025] A clogging prevention vacuum tube 5 is provided at the top of the storage tank 2. The lower end of the vacuum pumping pipeline 10 is connected to the upper end of the clogging prevention vacuum tube 5, and an air extraction valve 11 is installed on the vacuum pumping pipeline 10. Specifically, the upper end of the vacuum pumping pipeline 10 is connected to an air extraction device. The clogging prevention vacuum tube 5 extends vertically, the lower end of the clogging prevention vacuum tube 5 is connected to the top of the storage tank 2, the height of the clogging prevention vacuum tube 5 is 4 - 6 m, and the diameter of the clogging prevention vacuum tube 5 is 200 - 300 mm. By thickening the clogging prevention vacuum tube 5, even if biogas slurry is pumped into the clogging prevention vacuum tube, after the biogas slurry in the storage tank is discharged, the biogas residue adhering to the inside of the clogging prevention vacuum tube will not block the pipeline and will not affect subsequent use.
[0026] Working principle: When in use, open the relief valve for 3 - 5 minutes to connect the storage tank 2 and the external air through the ventilation pipe 13 to balance the air pressure. The anti - reflux elbow is located below the liquid level in the fermentation tank 1. Due to the liquid level difference inside and outside the storage tank 2, the biogas slurry in the fermentation tank 1 automatically flows into the storage tank 2 to balance the biogas slurry liquid levels inside and outside the storage tank 2, and then close the relief valve 9. Open the air extraction valve for 3 - 5 minutes to draw a negative pressure on the storage tank 2 through the vacuum pumping pipeline 10 to further fill the storage tank 2 with biogas slurry, and then close the air extraction valve 11. Open the air inlet valve 8 and the discharge valve 12, and introduce compressed air into the storage tank 2 through the pressurization pipeline 7 to increase the pressure. After 3 - 5 minutes, the discharging is completed, and then close the air inlet valve 8 and the discharge valve 12.
[0027] Of course, the above description is not limited to the above examples. The technical features not described in the present utility model can be achieved by or adopted from the prior art, and will not be elaborated here; the above embodiments and the accompanying drawings are only used to illustrate the technical solutions of the present utility model and are not intended to limit the present utility model. The present utility model has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions, or substitutions made by those of ordinary skill in the art within the scope of the essence of the present utility model do not depart from the purpose of the present utility model and should also fall within the scope of the protection of the claims of the present utility model.
Claims
1. An efficient pneumatic discharging device for biogas slurry with high solid content rate, comprising a fermentation tank (1) and a storage tank (2), characterized in that: The storage tank is fixedly arranged inside the fermentation tank, and the top of the storage tank extends outside the fermentation tank. The top of the storage tank (2) is provided with a feed pipe (3), a discharge pipe (6) and a vacuum extraction pipe (10). The lower end of the feed pipe (3) penetrates through the storage tank (2) and extends into the fermentation tank (1). An anti-backflow elbow is provided on the pipe body of the feed pipe (3) inside the storage tank (2). The upper end of the feed pipe (3) is communicated with a vent pipe (13) and a pressurization pipe (7), and a relief valve (9) and an intake valve (8) are respectively installed on the vent pipe and the pressurization pipe. The lower end of the discharge pipe (6) extends into the storage tank (2), and a discharge valve (12) is installed at the upper end of the discharge pipe (6). A vacuum extraction valve (11) is installed on the vacuum extraction pipe (10).
2. The high-efficiency and high-solid-content biogas slurry pneumatic discharging device according to claim 1, wherein: An anti-blocking vacuum pipe (5) is provided at the top of the storage tank (2), and the upper ends of the vacuum extraction pipe (10) and the anti-blocking vacuum pipe (5) are connected.
3. The high-efficiency and high-solid-content biogas slurry pneumatic discharging device according to claim 2, wherein: The height of the anti-blocking vacuum pipe (5) is 4 - 6 m, and the diameter of the anti-blocking vacuum pipe is 200 - 300 mm.
4. An efficient pneumatic discharging device for biogas slurry with high solid content according to claim 1, characterized in that: The height of the storage tank (2) is 5.5 - 6.5 m, and the top of the storage tank is 1.0 - 1.5 m higher than the top of the fermentation tank.
5. An efficient pneumatic discharging device for biogas slurry with high solid content according to claim 1, characterized in that: The anti-backflow elbow is located at the middle position inside the storage tank (2).
6. The efficient high-solid-content biogas slurry pneumatic discharging device according to claim 1, wherein: The anti-backflow elbow includes a 90-degree elbow (4) and an extension pipe (14) fixedly connected to the lower port of the 90-degree elbow.
7. An efficient pneumatic discharging device for biogas slurry with high solid content according to claim 1, characterized in that: The lower port of the discharge pipe (6) is 0.3 - 0.7 m away from the bottom of the storage tank (2).
8. An efficient pneumatic discharging device for biogas slurry with high solid content according to claim 1, characterized in that: The lower port of the feed pipe (3) is 0.4 - 0.6 m away from the bottom of the fermentation tank (1).