Biogas charging system

Abstract

The utility model provides a methane furnace entering system, which belongs to the technical field of leachate treatment, and comprises a methane furnace entering pipeline, a steam-water separation device and a drainage device, the steam-water separation device is positioned at the lowest point of the methane furnace entering pipeline, and the steam-water separation device comprises a tank body and a steam-water separation partition plate; the steam-water separation partition plate is transversely arranged between the air inlet and the air outlet, and air holes are formed in the steam-water separation partition plate; a water outlet is formed in the bottom of the tank body; the drainage device comprises a U-shaped water seal bend and an automatic steam trap, one end of the U-shaped water seal bend is connected with the water outlet of the tank body, and the other end of the U-shaped water seal bend is connected with the automatic steam trap. According to the biogas furnace-entering system provided by the utility model, water in biogas is separated by the steam-water separation partition plate and then is discharged from the water outlet, so that the problem that accumulated water in a pipeline cannot be discharged due to too much water in the biogas furnace-entering pipeline is solved; the U-shaped water seal bend and the automatic steam trap are connected to the water outlet, so that methane leakage can be avoided, and accumulated water can be discharged in time.

Description

Technical Field

[0001] The utility model belongs to the technical field of leachate treatment, and more specifically, relates to a biogas inlet furnace system. Background Art

[0002] A certain amount of biogas is generated in the leachate treatment station of a domestic waste incineration power plant. The main biogas treatment methods include: torch combustion, discharging to the garbage pit and then incinerating in the furnace, biogas power generation, biogas incineration in the furnace, etc. The method of torch combustion has good safety, but sulfur dioxide will be generated in the flue gas after torch combustion; in addition, occasionally, the torch is ignited multiple times, resulting in a large amount of biogas being emptied, causing air pollution; the method of discharging to the garbage pit and then incinerating in the furnace has poor safety and there is a risk of explosion; the method of biogas power generation is safe and environmentally friendly, but the process is complex, the one-time investment is large, and the operating cost is high; biogas incineration in the furnace is to collect biogas and send it to a biogas burner, and then spray it into the incinerator for incineration.

[0003] The main components and volume ratios of biogas in a domestic waste incineration power plant are as follows: methane: 65%-72%, carbon dioxide: 20%-30%, nitrogen: 3%-10%, hydrogen: 0.05%-0.15%, hydrogen sulfide: 20%-50%, water: 5%.

[0004] Due to the large water content of biogas, water will accumulate in the biogas inlet furnace pipeline during operation, resulting in a small biogas flow rate, and then causing the burner to frequently extinguish and automatically exit the operation; in addition, the biogas inlet furnace booster fan cannot discharge the accumulated water in the pipeline, and too much pressure will cause the inverter of the biogas inlet furnace booster fan to trip due to overcurrent protection. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a biogas inlet furnace system, aiming to solve the problem that the accumulated water in the biogas inlet furnace pipeline cannot be discharged.

[0006] To achieve the above object, the technical solution adopted by the utility model is: to provide a biogas inlet furnace system, including a biogas inlet furnace pipeline, a steam-water separation device and a drainage device. The steam-water separation device is located at the lowest point of the biogas inlet furnace pipeline. The steam-water separation device includes a tank body and a steam-water separation partition board. Opposite side walls of the tank body are provided with an air inlet and an air outlet. The air inlet and the air outlet are respectively communicated with the biogas inlet furnace pipelines on both sides of the tank body; the steam-water separation partition board is horizontally arranged between the air inlet and the air outlet, and air holes are opened on the steam-water separation partition board; a drainage port is opened at the bottom of the tank body; the drainage device includes a U-shaped water seal bend and an automatic steam trap. One end of the U-shaped water seal bend is connected to the drainage port of the tank body, and the other end of the U-shaped water seal bend is connected to the automatic steam trap.

[0007] As another embodiment of the present application, the edge of the steam-water separation partition is attached to the inner side wall of the tank body, and the steam-water separation partition is inclined upward in the direction of the air inlet.

[0008] As another embodiment of the present application, the included angle between the steam-water separation partition and the horizontal direction is 45°-90°.

[0009] As another embodiment of the present application, the steam-water separation partition includes a plurality of plate bodies arranged in parallel, and air holes are formed in each plate body.

[0010] As another embodiment of the present application, the air holes are uniformly distributed on the plate body, and the diameter of the air holes is less than 30 mm.

[0011] As another embodiment of the present application, the drain port includes a main drain port and an auxiliary drain port. The main drain port is located on one side of the steam-water separation partition close to the air inlet; the auxiliary drain port is located on one side of the steam-water separation partition close to the exhaust port.

[0012] As another embodiment of the present application, the inner diameter of the auxiliary drain port is smaller than the inner diameter of the main drain port.

[0013] As another embodiment of the present application, the upper pipe wall of the water outlet end of the U-shaped water seal bend is flush with the bottom plate of the tank body.

[0014] As another embodiment of the present application, a stop valve is installed on the pipeline between the U-shaped water seal bend and the automatic steam trap.

[0015] As another embodiment of the present application, the drainage device further includes a sump arranged below the tank body. The sump is connected to the drainage end of the automatic steam trap; a submersible pump and a float level gauge are provided in the sump.

[0016] The beneficial effects of the biogas inlet furnace system provided by the present utility model are as follows: Compared with the prior art, in the biogas inlet furnace system of the present utility model, a steam-water separation device is arranged at the lowest point of the biogas inlet furnace pipeline. By inputting biogas into the tank body of the steam-water separation device, the flow rate of the biogas is reduced when passing through the air holes of the steam-water separation partition, and the water in the biogas is separated out; the water separated out from the biogas flows through the U-shaped water seal bend to the automatic steam trap from the drain port and is discharged by the automatic steam trap; the steam-water separation partition separates the water in the biogas and discharges it from the drain port, solving the problems of too much moisture in the biogas in the biogas inlet furnace pipeline and the inability to drain the accumulated water in the pipeline; the U-shaped water seal bend is connected to the automatic steam trap at the drain port, which can avoid biogas leakage and drain the accumulated water in time. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the biogas inlet furnace system provided by the embodiment of the present utility model;

[0019] Figure 2 It is a schematic structural diagram of the steam-water separation device provided by the embodiment of the present utility model;

[0020] Figure 3 It is a front view of the steam-water separation partition provided by the embodiment of the present utility model.

[0021] In the figure: 1. Waste incinerator; 2. Biogas burner; 3. Biogas inlet furnace pipeline; 4. Well chamber; 5. Steam-water separation device; 6. U-shaped water seal bend; 7. Automatic steam trap; 8. Float level gauge; 9. Submersible pump; 10. Inlet furnace booster fan; 11. Biogas storage tank; 12. Air inlet; 13. Exhaust port; 14. Steam-water separation partition; 15. Main drain port; 16. Auxiliary drain port; 17. Air hole. Detailed implementation manners

[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] Please refer to Figures 1 to 3 , and now the biogas inlet furnace system provided by the present utility model will be described. The biogas inlet furnace system includes a biogas inlet furnace pipeline 3, a steam-water separation device 5 and a drainage device. The steam-water separation device 5 is located at the lowest point of the biogas inlet furnace pipeline 3. The steam-water separation device 5 includes a tank body and a steam-water separation partition 14. The side wall of the tank body is provided with an air inlet 12 and an exhaust port 13 opposite to each other. The air inlet 12 and the exhaust port 13 are respectively communicated with the biogas inlet furnace pipeline 3 on both sides of the tank body; the steam-water separation partition 14 is horizontally arranged between the air inlet 12 and the exhaust port 13, and air holes 17 are opened on the steam-water separation partition 14; a drain port is opened at the bottom of the tank body; the drainage device includes a U-shaped water seal bend 6 and an automatic steam trap 7. One end of the U-shaped water seal bend 6 is connected to the drain port of the tank body, and the other end of the U-shaped water seal bend 6 is connected to the automatic steam trap 7.

[0024] The biogas inlet furnace system provided by the utility model, compared with the prior art, sets a steam-water separation device 5 at the lowest point of the biogas inlet furnace pipeline 3. By inputting biogas into the tank body of the steam-water separation device 5, the flow rate of the biogas is reduced when passing through the air holes 17 of the steam-water separation partition plate 14, and the water in the biogas is separated out; the water separated from the biogas flows from the drain port through the U-shaped water seal bend 6 to the automatic steam trap 7 and is discharged by the automatic steam trap 7; the steam-water separation partition plate 14 separates the water in the biogas and discharges it from the drain port, solving the problems of too much moisture in the biogas in the biogas inlet furnace pipeline 3 and the accumulated water in the pipeline being unable to be discharged; the U-shaped water seal bend 6 is connected to the automatic steam trap 7 at the drain port, which can prevent biogas leakage and discharge the accumulated water in time.

[0025] Specifically, the layout of the biogas inlet furnace pipeline 3 can be newly laid or the old pipeline can be reformed. The starting end of the biogas inlet furnace pipeline 3 is connected to the biogas storage tank 11, and the end of the biogas inlet furnace pipeline 3 is connected to the biogas burner 2 system on one side of the waste incinerator 1. There is a lowest point in the middle of the biogas inlet furnace pipeline 3. A well chamber 4 is added at the lowest point of the biogas inlet furnace pipeline 3, and a sump is arranged in the well chamber 4. The lowest point of the biogas inlet furnace pipeline 3 section is located in the well chamber 4, and a steam-water separation device 5 is set at this lowest point. The drain port at the lower end of the steam-water separation device 5 is connected to a water delivery pipe, and a U-shaped water seal bend 6 is arranged on the water delivery pipe, and the closed end of the U-shaped water seal bend 6 faces downward. An automatic steam trap 7 is installed on the water delivery pipe in the downstream direction of the U-shaped water seal bend 6. The automatic steam trap 7 is used to automatically drain the accumulated water in the water delivery pipe and transport the accumulated water to the sump through a pipeline, ensuring that the biogas inlet furnace pipeline 3 will not accumulate water. A float level gauge 8 and a submersible pump 9 are also arranged in the sump. The float level gauge 8 can be replaced by a float ball level switch, and signals are transmitted to the control system according to the liquid level height in the sump, and the control system controls the start of the submersible pump 9 to discharge the collected water in the sump to the recovery water tank. The control system can adopt a control box, and the control box is equipped with a control component composed of a single-chip microcomputer and other structures.

[0026] The U-shaped water seal bend 6 installed on the water delivery pipe prevents biogas from leaking from the water delivery pipe through the water seal. In order to monitor the biogas leakage during the automatic steam drainage of the inlet furnace pipeline in time, methane and hydrogen sulfide gas detectors are arranged in the well chamber 4 and around the well chamber 4 to monitor the biogas leakage in the biogas pipeline. When the gas detector detects that the gas exceeds the standard, the gas supply pipeline is immediately cut off to ensure safety. For example: 2 methane gas detectors are arranged at the inner opening of the well chamber 4, 2 hydrogen sulfide gas detectors are arranged at the bottom of the well chamber 4, 2 methane gas detectors are installed about 1.5 meters above the outer wellhead of the well chamber 4, 2 hydrogen sulfide gas detectors are installed at the outer opening of the well chamber 4, 8 toxic and harmful gas detectors are connected to the combustible gas controller, and the alarm limit of the methane gas detector is set to 25% LEL, and the alarm limit of the hydrogen sulfide gas detector is set to 7 ppm. The alarm point of the combustible gas controller is interlocked with the furnace booster fan 10 and the biogas inlet pipeline quick closing isolation valve.

[0027] In some possible embodiments, refer to Figure 2 , the edge of the steam-water separation partition 14 fits against the inner wall of the tank body, and the steam-water separation partition 14 is inclined upward from bottom to top in the direction of the air inlet 12.

[0028] The steam-water separation partition 14 is an inclined plate-like structure. The edge of the steam-water separation partition 14 can be fixed to the inner wall of the tank body by welding or bolts. A plurality of air holes 17 are evenly distributed on the steam-water separation partition 14 for the airflow of biogas to pass through, and at the same time, the flow velocity of the airflow is reduced to precipitate the excess moisture in the biogas; in addition, the accumulated water in other pipe sections of the biogas inlet furnace pipe 3 all flows into the steam-water separation device 5 at the lowest point of the pipe.

[0029] The inclined direction of the steam-water separation partition 14 is such that its upper end is close to the air inlet 12 and its lower end is close to the exhaust port 13. And the air inlet 12 is located below the exhaust port 13. The biogas enters from the air inlet 12, flows obliquely upward in the tank body, passes through the air holes 17 on the steam-water separation partition 14, and then continues to flow obliquely upward to the exhaust port 13.

[0030] The included angle between the steam-water separation partition 14 and the horizontal direction is 45° - 90°. The included angle between the connecting line direction of the air inlet 12 and the exhaust port 13 and the steam-water separation partition 14 is 60° - 90°.

[0031] The steam-water separation partition 14 includes a plurality of plate bodies arranged in parallel, and air holes 17 are formed on each plate body. As Figure 2 shown, there are two steam-water separation partitions 14, and the two steam-water separation partitions 14 are arranged in parallel at intervals. The flow velocity of the biogas can be further reduced and the moisture content in the biogas can be reduced.

[0032] The steam-water separation partition 14 can be made of an oval stainless steel plate, and the distance between adjacent two steam-water separation partitions 14 is not less than 30 mm. The air holes 17 are evenly distributed on the plate body, and the aperture of the air holes 17 is less than 30 mm. Optionally, the aperture of the air holes 17 is 20 mm.

[0033] In some possible embodiments, refer to Figure 1 , the drain port includes a main drain port 15 and an auxiliary drain port 16. The main drain port 15 is located on the side of the steam-water separation partition 14 close to the air inlet 12; the auxiliary drain port 16 is located on the side of the steam-water separation partition 14 close to the exhaust port 13.

[0034] The auxiliary drain port 16 is one or more. When there are multiple auxiliary drain ports 16, the multiple auxiliary drain ports 16 are arranged at intervals along the connecting line direction of the air inlet 12 and the exhaust port 13. And the inner diameter of the auxiliary drain port 16 is smaller than the inner diameter of the main drain port 15.

[0035] Optionally, the upper pipe wall at the water outlet end of the U-shaped water seal bend 6 is flush with the bottom plate of the tank body. A stop valve is installed on the pipeline between the U-shaped water seal bend 6 and the automatic steam trap 7.

[0036] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. Biogas inlet system, characterized in that: The invention comprises a biogas inlet pipe (3), a steam-water separation device (5) and a drainage device. The steam-water separation device (5) is located at the lowest point of the biogas inlet pipe (3). The steam-water separation device (5) comprises a tank body and a steam-water separation baffle (14). The side walls of the tank body are provided with an air inlet (12) and an air outlet (13) facing each other. The air inlet (12) and the air outlet (13) are respectively connected to the biogas inlet pipe (3) on both sides of the tank body. The steam-water separation baffle (14) is transversely arranged between the air inlet (12) and the air outlet (13). The steam-water separation baffle (14) is provided with an air hole (17). The bottom of the tank body is provided with a drainage port. The drainage device comprises a U-shaped water seal bend (6) and an automatic water trap (7). One end of the U-shaped water seal bend (6) is connected to the drainage port of the tank body, and the other end of the U-shaped water seal bend (6) is connected to the automatic water trap (7).

2. The biogas feeding system according to claim 1, characterized in that: The edge of the steam-water separation partition (14) is in contact with the inner wall of the tank body, and the steam-water separation partition (14) is inclined from bottom to top in the direction of the air inlet (12).

3. The biogas feeding system according to claim 2, characterized in that: The angle between the steam-water separation partition (14) and the horizontal direction is 45°-90°.

4. The biogas feeding system according to claim 3, characterized in that: The steam-water separation partition (14) comprises a plurality of parallel plate bodies, each of which is provided with an air hole (17).

5. The biogas feeding system according to claim 4, characterized in that: The pores (17) are evenly distributed on the plate body, and the diameter of the pores (17) is less than 30 mm.

6. The biogas feeding system according to claim 1, characterized in that: The drain outlet comprises a main drain outlet (15) and an auxiliary drain outlet (16); the main drain outlet (15) is located on a side of the steam-water separation baffle (14) close to the air inlet (12); and the auxiliary drain outlet (16) is located on a side of the steam-water separation baffle (14) close to the air outlet (13).

7. The biogas feeding system according to claim 6, characterized in that: The inner diameter of the auxiliary drain port (16) is smaller than the inner diameter of the main drain port (15).

8. The biogas feeding system according to claim 1, characterized in that: The upper tube wall of the water outlet end of the U-shaped water seal bend (6) is flush with the bottom plate of the tank body.

9. The biogas feeding system according to claim 1, characterized in that: A stop valve is installed on the pipeline between the U-shaped water seal bend (6) and the automatic steam trap (7).

10. The biogas feeding system according to claim 1, characterized in that: The drainage device also includes a sump located below the tank body, the sump being connected to the drainage end of the automatic drain (7); a submersible pump (9) and a float level gauge (8) are provided in the sump.

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