Biogas spraying buffer tank

Abstract

The utility model discloses a methane spraying buffer tank, which relates to the field of methane treatment and comprises a skirt, a tank body is arranged above the skirt, a water outlet pipe and a gas inlet pipe are sequentially arranged below the tank body from bottom to top, the gas outlet pipe is arranged at the top of the tank body, and a spraying pipe is arranged above one end, extending into the tank body, of the gas inlet pipe; the backwashing structures on the upper side and the lower side of the wire mesh demister spray a high-pressure water source to the wire mesh demister, the wire mesh demister is flushed, impurities blocking wire mesh pores are flushed away, and the situation that after the wire mesh pores are blocked, the gas-liquid separation efficiency is reduced, more liquid drops flow out along with gas, and downstream equipment is affected is prevented.

Description

Technical Field

[0001] The utility model relates to the field of biogas treatment, in particular to a biogas spray buffer tank. Background Technique

[0002] During the biogas treatment process, due to the change of treatment procedures, the pressure of biogas will also change continuously. Therefore, a buffer tank is needed to stabilize the pressure of biogas, achieve stable biogas supply, and ensure the safe and efficient operation of subsequent treatment processes. At the same time, the sprayer in the buffer tank absorbs impurities in biogas through the spray liquid, and the separated water and particles settle to the bottom of the buffer tank under the action of gravity. At the same time, some impurity gases dissolved in water are discharged from the bottom of the buffer tank along with the water. The purified gas comes out from the top and enters the subsequent process.

[0003] During the spraying process, a large number of tiny droplets will be carried in the biogas. In order to reduce the water content of the biogas, a wire mesh demister is installed at the top of the buffer tank. The wire mesh demister can effectively capture these droplets and prevent them from entering the subsequent process along with the biogas.

[0004] However, after the wire mesh demister is used for a long time, a large amount of droplets and particulate matter will accumulate on the wire mesh. These accumulations will gradually block the pores of the wire mesh, and the blocked wire mesh will reduce the gas-liquid separation efficiency, resulting in more droplets flowing out with the gas and affecting downstream equipment. Content of the Utility Model

[0005] The purpose of the utility model is to provide a biogas spray buffer tank, which is used to solve the problem that after the wire mesh demister in the existing spray buffer tank is used for a long time, a large amount of droplets and particulate matter will accumulate on the wire mesh. These accumulations will gradually block the pores of the wire mesh, and the blocked wire mesh will reduce the gas-liquid separation efficiency, resulting in more droplets flowing out with the gas and affecting downstream equipment.

[0006] The technical solution adopted by the utility model is as follows: a biogas spray buffer tank includes a skirt support. A tank body is arranged above the skirt support. A water outlet pipe and an air inlet pipe are sequentially arranged below the tank body from bottom to top. An air outlet pipe is arranged at the top of the tank body. A spray pipe is arranged above the end of the air inlet pipe extending into the tank body. The spray pipe is communicated with a spray water source through a pipeline. A wire mesh demister is arranged above the spray pipe. Anti-flushing structures are arranged on both the upper and lower sides of the wire mesh demister;

[0007] The anti-flushing structure includes a flushing water inlet pipe, an arc-shaped pipe and the nozzle. One end of the flushing water inlet pipe is communicated with the spray water source. The other end of the flushing water inlet pipe penetrates through the shell of the tank body and is then communicated with the arc-shaped pipe. The nozzle is installed on one side of the arc-shaped pipe close to the wire mesh demister.

[0008] Further, a manhole maintenance opening of the tank body is installed on the outer side between the cavity formed between the wire mesh demister and the top of the tank body.

[0009] Further, a sewage discharge pipe is arranged at the bottom of the tank body.

[0010] Further, an observation window is installed on the tank body shell outside the spray pipe.

[0011] Further, a skirt manhole maintenance opening is installed on the skirt support.

[0012] Further, a low-level liquid gauge and a high-level liquid gauge are sequentially installed on the outer side of the tank body from bottom to top. The low-level liquid gauge is lower than the installation height of the water outlet pipe, and the high-level liquid gauge is higher than the installation height of the water outlet pipe. The low-level liquid gauge and the high-level liquid gauge are interlocked with a solenoid valve for controlling the on-off of the water outlet pipe.

[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, the backwashing structures on the upper and lower sides of the wire mesh demister spray high-pressure water sources to the wire mesh demister for flushing, washing away the impurities blocking the pores of the wire mesh, preventing the blockage of the wire mesh voids, reducing its gas-liquid separation efficiency, resulting in more liquid droplets flowing out with the gas and affecting downstream equipment;

[0015] 2. In the present utility model, the backwashing structures are arranged in pairs and symmetrically on the upper and lower sides of the wire mesh demister. The arc-shaped pipes in the backwashing structures are semi-circular, so the arc-shaped pipes in each group of backwashing structures form a quasi-circular structure, enabling the flushing liquid sprayed by the nozzles installed on the arc-shaped pipes to cover the entire wire mesh demister and improving the cleaning effect of the backwashing structure;

[0016] 3. In the present utility model, a manhole maintenance opening of the tank body is installed on the outer side between the cavity formed between the wire mesh demister and the top of the tank body, facilitating the staff to enter the tank body through the manhole maintenance opening of the tank body to maintain the wire mesh demister;

[0017] 4. In the present utility model, an observation window is installed on the tank body shell outside the spray pipe, facilitating the observation of the working condition of the spray pipe;

[0018] 5. In the present utility model, a low-level liquid level gauge and a high-level liquid level gauge are successively installed on the outer side of the tank body from bottom to top. The low-level liquid level gauge is lower than the installation height of the water outlet pipe, and the high-level liquid level gauge is higher than the installation height of the water outlet pipe. The low-level liquid level gauge and the high-level liquid level gauge are interlocked with an electromagnetic valve for controlling the on-off of the water outlet pipe. When the liquid level is higher than the high-level liquid level gauge, the electromagnetic valve is opened to discharge the spraying liquid in the tank body. When the liquid level is lower than the low-level liquid level gauge, the electromagnetic valve is closed to stop discharging the spraying liquid in the tank body, and the liquid level in the tank body is maintained. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the backwashing structure in the present utility model;

[0021] Figure 3 is a top view of the backwashing structure in the present utility model.

[0022] DESCRIPTION OF THE REFERENCE NUMERALS:

[0023] 1. Tank body; 2. Air inlet pipe; 3. Air outlet pipe; 4. Water outlet pipe; 5. Spraying pipe; 6. Drain pipe; 7. High-level liquid level gauge; 8. Manhole maintenance opening of skirt support; 9. Backwashing structure; 91. Flushing water inlet pipe; 92. Arc-shaped pipe; 93. Sprinkler head; 10. Manhole maintenance opening of tank body; 11. Wire mesh demister; 12. Skirt support; 13. Observation window; 14. Low-level liquid level gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1

[0027] Figures 1 - 3As shown in the figure: A biogas spray buffer tank includes a skirt support 12. Above the skirt support 12, there is a tank body 1. Below the tank body 1, a water outlet pipe 4 and an air inlet pipe 2 are arranged in sequence from bottom to top. At the top of the tank body 1, there is an air outlet pipe 3. Above the end of the air inlet pipe 2 extending into the interior of the tank body 1, there is a spray pipe 5. The spray pipe 5 is connected to a spray water source through a pipeline. Above the spray pipe 5, there is a wire mesh demister 11. On both the upper and lower sides of the wire mesh demister 11, there is an anti - flushing structure 9;

[0028] The anti - flushing structure 9 includes a flushing water inlet pipe 91, an arc - shaped pipe 92, and a nozzle 93. One end of the flushing water inlet pipe 91 is connected to the spray water source, and the other end of the flushing water inlet pipe 91 penetrates through the shell of the tank body 1 and is connected to the arc - shaped pipe 92. Nozzles 93 are installed on the side of the arc - shaped pipe 92 close to the wire mesh demister 11.

[0029] The biogas to be treated enters from the air inlet pipe 2 at the bottom of the tank body 1. The tank body 1 provides a certain volume to balance the fluctuation of the intake air volume and stabilize the intake air flow rate and pressure of the subsequent treatment equipment. The spray pipe 5 sprays the spray liquid downward. The biogas moves upward in the tank body 1 and contacts the falling liquid droplets of the spray pipe 5 in a reverse direction. Water - soluble impurities, particulate matters, and moisture will also be captured or removed. The liquid absorbing the impurities is collected at the bottom of the tank body 1 of the tank body 1. When the biogas rises to the top of the tank body 1, the entrained liquid droplets are removed through the wire mesh demister 11 to prevent the liquid from entering the subsequent equipment. The gas that has been preliminarily purified and de - misted leaves from the air outlet pipe 3 at the top and enters the subsequent treatment process. After a part of the spray liquid participating in the treatment is discharged through the air inlet pipe 2, it is connected to the spray pipe 5 through a pipeline. The water pump installed between the spray pipes 5 pumps the spray liquid back to the spray pipe 5 for recycling.

[0030] The anti - flushing structures 9 installed on both the upper and lower sides of the wire mesh demister 11 spray high - pressure water sources onto the wire mesh demister 11 to wash it and wash away the impurities blocking the wire mesh pores. To prevent the gas - liquid separation efficiency from being reduced after the wire mesh pores are blocked, which may cause more liquid droplets to flow out with the gas and affect the downstream equipment;

[0031] Among them, the anti - flushing structures 9 are in pairs and are symmetrically arranged on both the upper and lower sides of the wire mesh demister 11. The arc - shaped pipe 92 in the anti - flushing structure 9 is semi - circular. Then, the arc - shaped pipes 92 in each group of anti - flushing structures 9 form a quasi - circular structure, so that the flushing liquid sprayed by the nozzles 93 installed on the arc - shaped pipe 92 can cover the entire wire mesh demister 11, improving the cleaning effect of the anti - flushing structure 9.

[0032] Embodiment 2

[0033] The difference between this embodiment and Embodiment 1 is that: an inspection opening 10 for the manhole of the tank body is installed on the outer side of the cavity formed between the wire mesh demister 11 and the top of the tank body 1, which is convenient for the staff to enter the tank body 1 through the inspection opening 10 for the manhole of the tank body to repair the wire mesh demister 11.

[0034] Embodiment 3

[0035] The difference between this embodiment and Embodiment 1 is that: a sewage discharge pipe 6 is arranged at the bottom of the tank body 1, which is convenient for regular cleaning and maintenance of the inside of the shell. The sewage discharge pipe 6 is in an L shape, one section of which penetrates through the shell of the tank body 1 and communicates with the inner cavity of the tank body 1, and the other section penetrates through the skirt support 12 and extends to the outside of the skirt support 12. In order to facilitate the maintenance inside the skirt support 12, a manhole inspection opening 8 for the skirt support is installed on the skirt support 12.

[0036] Embodiment 4

[0037] The difference between this embodiment and Embodiment 1 is that: an observation window 13 is installed on the shell of the tank body 1 outside the spray pipe 5, which is convenient for observing the working condition of the spray pipe 5.

[0038] Embodiment 6

[0039] The difference between this embodiment and Embodiment 1 is that: a low-level liquid gauge 14 and a high-level liquid gauge 7 are installed on the outside of the tank body 1 from bottom to top in sequence. The low-level liquid gauge 14 is lower than the installation height of the water outlet pipe 4, and the high-level liquid gauge 7 is higher than the installation height of the water outlet pipe 4. The low-level liquid gauge 14 and the high-level liquid gauge 7 are interlocked with an electromagnetic valve for controlling the on-off of the water outlet pipe 4.

[0040] When the liquid level is higher than the high-level liquid gauge 7, the electromagnetic valve is opened to discharge the spray liquid in the tank body 1. When the liquid level is lower than the low-level liquid gauge 14, the electromagnetic valve is closed to stop discharging the spray liquid in the tank body 1, and the liquid level in the tank body 1 is maintained.

[0041] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manner of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A biogas spray buffer tank, characterized in that It includes a skirt support (12), above which a tank body (1) is arranged. Below the tank body (1), a water outlet pipe (4) and an air inlet pipe (2) are arranged successively from bottom to top. At the top of the tank body (1), an air outlet pipe (3) is arranged. Above the end of the air inlet pipe (2) extending into the interior of the tank body (1), a spray pipe (5) is arranged. The spray pipe (5) is communicated with a spray water source through a pipeline. Above the spray pipe (5), a wire mesh demister (11) is arranged, and an anti-flushing structure (9) is arranged on both the upper and lower sides of the wire mesh demister (11); The anti-flushing structure (9) includes a flushing inlet pipe (91), an arc-shaped pipe (92) and a spray head (93). One end of the flushing inlet pipe (91) is communicated with the spray water source, and the other end of the flushing inlet pipe (91) penetrates through the shell of the tank body (1) and is then communicated with the arc-shaped pipe (92). The spray head (93) is installed on the side of the arc-shaped pipe (92) close to the wire mesh demister (11).

2. The biogas spray buffer tank according to claim 1, characterized in that: An inspection opening (10) for the tank body manhole is installed outside the cavity formed between the wire mesh demister (11) and the top of the tank body (1).

3. The biogas spray buffer tank according to claim 2, wherein: A blowdown pipe (6) is arranged at the bottom of the tank body (1).

4. A biogas spray buffer tank according to claim 3, characterized in that: An observation window (13) is installed on the shell of the tank body (1) outside the spray pipe (5).

5. A biogas spray buffer tank according to claim 4, characterized in that: A skirt support manhole inspection opening (8) is installed on the skirt support (12).

6. The biogas spray buffer tank according to claim 5, characterized in that: A low-level liquid gauge (14) and a high-level liquid gauge (7) are installed successively from bottom to top outside the tank body (1). The low-level liquid gauge (14) is lower than the installation height of the water outlet pipe (4), and the high-level liquid gauge (7) is higher than the installation height of the water outlet pipe (4). The low-level liquid gauge (14) and the high-level liquid gauge (7) are interlocked with an electromagnetic valve for controlling the on-off of the water outlet pipe (4).

Images