Gas-liquid separator

Abstract

The utility model discloses a gas-liquid separator, which relates to the field of biogas treatment and comprises a shell, a wire mesh demister is arranged in the shell, a gas separation area is formed between the upper side of the wire mesh demister and an inner cavity of the shell, and a bottom liquid storage area is formed between the lower side of the wire mesh demister and the inner cavity of the shell; the second pressure gauge and the first pressure gauge are respectively mounted on the outer sides of the gas separation area and the bottom liquid storage area to convert detected pressure values into electric signals and send the electric signals to the PLC, the PLC receives the signals from the first pressure gauge and the second pressure gauge and judges whether pressure difference exceeds a set threshold value or not according to a preset logic program, and if the pressure difference exceeds the set threshold value, the PLC sends the electric signals to the gas separation area. If yes, the cleaning valve is controlled to be opened through an output signal of the PLC, the high-pressure water source enters the annular pipe through the cleaning pipe, the high-pressure water source is sprayed to the wire mesh demister through the high-pressure nozzles on the annular pipe, the wire mesh demister is cleaned, blocked particle impurities or chemical precipitates are washed away, and the effect of the wire mesh demister is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the field of biogas treatment, in particular to a gas-liquid separator. Background Art

[0002] Biogas production typically contains a significant amount of water. If not removed, this water can condense in subsequent pipes and equipment, causing corrosion and blockage. Furthermore, the water can damage downstream processing equipment, such as desulfurization units and compressors. Removing liquid impurities can improve the purity and calorific value of biogas, facilitating its subsequent utilization.

[0003] Therefore, a gas-liquid separator is needed to remove the moisture contained in the biogas. In order to further enhance the gas-liquid separation effect, the gas-liquid separator will use a wire mesh demister to further process the liquid biogas. However, after a period of use, the wire mesh demister will be blocked due to accumulation of solid particles or chemical precipitation, affecting the use effect of the gas-liquid separator. Utility Model Content

[0004] The purpose of the utility model is to provide a gas-liquid separator for solving the problem that the wire mesh demister in the gas-liquid separator in the prior art may be blocked by solid particle accumulation or chemical precipitation after a period of use, thereby affecting the use effect of the gas-liquid separator.

[0005] The technical solution adopted by the utility model is as follows: a gas-liquid separator, comprising a shell, a wire mesh demister is arranged inside the shell, a gas separation area is formed between the upper side of the wire mesh demister and the inner cavity of the shell, and a bottom liquid storage area is formed between the lower side of the wire mesh demister and the inner cavity of the shell;

[0006] The gas separation area is connected to an air outlet pipe, the bottom liquid storage area is connected to an air inlet pipe, and the air inlet pipe is arranged tangentially to the shell;

[0007] An annular tube is provided below the wire mesh demister, one side of the annular tube is connected to a high-pressure water source through a cleaning pipe, high-pressure nozzles are evenly arranged above the annular tube, and a cleaning solenoid valve is installed after the end of the cleaning pipe away from the annular tube passes through the shell;

[0008] The outside of the gas separation area is connected to a second pressure gauge, the outside of the bottom liquid storage area is connected to a first pressure gauge, and the second pressure gauge and the first pressure gauge are connected to the cleaning solenoid valve.

[0009] Furthermore, a sewage pipe communicating with the inner cavity thereof is provided at the bottom of the shell, a sewage solenoid valve is installed on the sewage pipe, and a liquid level gauge is installed on the lower side of the shell, and the liquid level gauge is communicated with the sewage solenoid valve through the PLC.

[0010] Furthermore, a safety valve is installed on the top of the shell, and a manhole is installed on the outside of the gas separation area.

[0011] Furthermore, an outlet valve and an inlet valve are installed on the outlet pipe and the inlet pipe respectively. One end of the outlet valve away from the shell and one end of the inlet valve away from the shell are connected through a bypass pipe, and a bypass valve is installed on the bypass pipe.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0013] 1. The utility model installs a second pressure gauge and a first pressure gauge on the outside of the gas separation area and the bottom liquid storage area respectively to convert the detected pressure value into an electrical signal and send it to the PLC. The PLC receives the signals from the first pressure gauge and the second pressure gauge, and determines whether the pressure difference exceeds the set threshold according to the preset logic program. If the pressure difference exceeds the set threshold, the output signal of the PLC controls the opening of the cleaning valve, and the high-pressure water source enters the annular pipe through the cleaning pipe. The high-pressure water source is sprayed to the wire mesh demister through the high-pressure nozzle on the annular pipe to clean it and flush out the clogged particulate matter or chemical precipitates to avoid affecting the effect of the wire mesh demister.

[0014] 2. The utility model uses a liquid level gauge to monitor the liquid level at the bottom of the shell in real time. The liquid level gauge converts the detected liquid level into an electrical signal and sends it to the PLC. The PLC receives the signal from the liquid level gauge and determines whether the liquid level exceeds the set threshold according to the preset logic program. If the set threshold is exceeded, the output signal of the PLC controls the opening of the sewage solenoid valve, and the liquid in the bottom liquid storage area is discharged through the sewage pipe.

[0015] 3. When the gas-liquid separator of the utility model needs maintenance, in order to avoid affecting the normal operation of the entire system, the air inlet pipe and the air outlet pipe are connected through the bypass pipe, the air outlet valve and the air inlet valve are opened, and the bypass valve is opened, so that the liquid biogas bypasses the gas-liquid separator to ensure the continuous operation of the system;

[0016] 4. A safety valve is installed on the top of the shell of the utility model to prevent the pressure inside the shell from exceeding the designed safety limit. When the system pressure exceeds the set value, the safety valve automatically opens to release excess pressure to prevent damage to the equipment. A manhole is installed on the outside of the gas separation area to facilitate operators to enter and inspect and maintain the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a top view of the present utility model.

[0019] Description of reference numerals:

[0020] 1. Shell; 2. Wire mesh demister; 3. Manhole; 4. Safety valve; 5. Bypass structure; 51. Exhaust pipe; 52. Exhaust valve; 53. Inlet pipe; 54. Inlet valve; 55. Bypass valve; 6. Drain pipe; 7. Drain solenoid valve; 8. Liquid level gauge; 9. First pressure gauge; 10. Second pressure gauge; 11. Cleaning pipe; 12. Ring pipe; 13. Cleaning solenoid valve. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0023] Example 1

[0024] Figure 1-Figure 2 As shown: A gas-liquid separator includes a shell 1, a wire mesh demister 2 is arranged inside the shell 1, a gas separation area is formed between the upper side of the wire mesh demister 2 and the inner cavity of the shell 1, and a bottom liquid storage area is formed between the lower side of the wire mesh demister 2 and the inner cavity of the shell 1;

[0025] The gas separation area is connected to an outlet pipe 51, and the bottom liquid storage area is connected to an inlet pipe 53, which is arranged tangentially to the shell 1;

[0026] An annular pipe 12 is provided below the wire mesh demister 2. One side of the annular pipe 12 is connected to a high-pressure water source through a cleaning pipe 11. High-pressure nozzles are evenly arranged above the annular pipe 12. The end of the cleaning pipe 11 away from the annular pipe 12 passes through the shell 1 and is equipped with a cleaning solenoid valve 13.

[0027] The outside of the gas separation area is connected to a second pressure gauge 10 , and the outside of the bottom liquid storage area is connected to a first pressure gauge 9 . The second pressure gauge 10 and the first pressure gauge 9 are connected to a cleaning solenoid valve 13 .

[0028] After the liquid-laden biogas enters the shell 1 tangentially through the inlet pipe 53, it forms a swirling motion on the inner wall of the shell 1. Centrifugal force propels droplets larger than 200 μm toward the inner wall of the shell 1. These droplets are captured by the inner wall and flow into the liquid storage area at the bottom under the action of gravity. The airflow then returns upward through the wire mesh demister 2. The fine liquid mist carried by the airflow is captured by the fiber filaments through inertial collision adsorption and Brownian motion. It then rapidly disperses on the fiber surface, forming a liquid film. Finally, under the action of gravity, it flows downward along the liquid film, dripping into the liquid storage area at the bottom.

[0029] When the gas-liquid separator operates normally, the pressure difference between the gas separation area and the bottom liquid storage area should be small. If the pressure difference increases significantly, it means that the wire mesh of the wire mesh demister 2 is clogged. Therefore, a second pressure gauge 10 and a first pressure gauge 9 are installed on the outside of the gas separation area and the bottom liquid storage area respectively to convert the detected pressure value into an electrical signal and send it to the PLC. The PLC determines whether the pressure difference exceeds the set threshold according to the preset logic program. If it exceeds the set threshold, the cleaning valve 13 is controlled to open by the output signal of the PLC, and the high-pressure water source enters the annular pipe 12 through the cleaning pipe 11. The high-pressure water source is sprayed to the wire mesh demister 2 through the high-pressure nozzle on the annular pipe 12 to clean it and flush away the clogged particulate matter or chemical precipitates.

[0030] Example 2

[0031] The difference between this embodiment and embodiment 1 is that a sewage discharge pipe 6 connected to the inner cavity of the shell 1 is provided at the bottom, a sewage discharge solenoid valve 7 is installed on the sewage discharge pipe 6, and a liquid level meter 8 is installed on the lower side of the shell 1. The liquid level meter 8 is connected to the sewage discharge solenoid valve 7 through the PLC.

[0032] During the gas-liquid separation process, the liquid components in the gas are separated and collected in the bottom liquid storage area. The drain pipe is used to regularly discharge the accumulated liquid to prevent the liquid level from being too high and affecting the separation effect. However, currently most operators observe the liquid level and discharge the liquid in the liquid storage area in time, and it is impossible to monitor the liquid level in real time.

[0033] Therefore, the liquid level at the bottom of the shell 1 is monitored by the liquid level meter 8, and the liquid level meter 8 converts the detected liquid level into an electrical signal and sends it to the PLC. The PLC receives the signal from the liquid level meter 8 and determines whether the liquid level exceeds the set threshold according to the preset logic program. If it exceeds the set threshold, the output signal of the PLC controls the drain solenoid valve 7 to open, and the liquid in the bottom liquid storage area is discharged through the drain pipe 6.

[0034] Example 3

[0035] The difference between this embodiment and embodiment 1 is that an outlet valve 52 and an inlet valve 54 are respectively installed on the outlet pipe 51 and the inlet pipe 53, and the end of the outlet valve 52 away from the shell 1 and the end of the inlet valve 54 away from the shell 1 are connected by a bypass pipe, and a bypass valve 55 is installed on the bypass pipe.

[0036] When the shell 1 is operating normally, the outlet valve 52 and the inlet valve 54 are opened, and the liquid biogas enters from the inlet pipe 53 and is discharged from the outlet pipe 51 after treatment. When the shell 1 needs to be maintained, in order to avoid affecting the normal operation of the entire system, the inlet pipe 53 and the outlet pipe 51 are connected through the bypass pipe, the outlet valve 52 and the inlet valve 54 are opened, and the bypass valve 55 is opened, so that the liquid biogas bypasses the gas-liquid separator to ensure the continuous operation of the system.

[0037] The air outlet pipe 51, the air outlet valve 52, the air inlet pipe 53, the air inlet valve 54 and the bypass valve 55 constitute a bypass structure 5, which forms an integral device with the housing 1, reducing the workload and difficulty of equipment installation.

[0038] Example 4

[0039] The difference between this embodiment and embodiment 1 is that: a safety valve 4 is installed on the top of the shell 1 to prevent the pressure in the shell 1 from exceeding the designed safety limit. When the system pressure exceeds the set value, the safety valve 4 automatically opens to release excess pressure to prevent damage to the equipment. A manhole 3 is installed on the outside of the gas separation area to facilitate operators to enter and inspect and maintain the equipment.

[0040] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A gas-liquid separator, characterized in that: The invention comprises a shell (1), wherein a wire mesh demister (2) is arranged inside the shell (1), a gas separation zone is formed between the upper side of the wire mesh demister (2) and the inner cavity of the shell (1), and a bottom liquid storage zone is formed between the lower side of the wire mesh demister (2) and the inner cavity of the shell (1); The gas separation zone is connected to an air outlet pipe (51), the bottom liquid storage zone is connected to an air inlet pipe (53), and the air inlet pipe (53) is arranged tangentially to the shell (1); An annular tube (12) is provided below the wire mesh demister (2), one side of the annular tube (12) is connected to a high-pressure water source through a cleaning tube (11), high-pressure nozzles are evenly provided above the annular tube (12), and an end of the cleaning tube (11) away from the annular tube (12) passes through the shell of the shell (1) and is then installed with a cleaning solenoid valve (13); The outside of the gas separation zone is connected to a second pressure gauge (10), the outside of the bottom liquid storage zone is connected to a first pressure gauge (9), and the second pressure gauge (10) and the first pressure gauge (9) are connected to the cleaning solenoid valve (13).

2. A gas-liquid separator according to claim 1, characterized in that: The bottom of the housing (1) is provided with a sewage discharge pipe (6) in communication with its inner cavity, and a sewage discharge solenoid valve (7) is installed on the sewage discharge pipe (6). A liquid level meter (8) is installed on the side surface of the lower part of the housing (1), and the liquid level meter (8) is in communication with the sewage discharge solenoid valve (7) via a PLC.

3. The gas-liquid separator according to claim 1, characterized in that: An outlet valve (52) and an inlet valve (54) are respectively installed on the outlet pipe (51) and the inlet pipe (53); an end of the outlet valve (52) away from the housing (1) and an end of the inlet valve (54) away from the housing (1) are connected via a bypass pipe; a bypass valve (55) is installed on the bypass pipe.

4. A gas-liquid separator according to claim 2, characterized in that: A safety valve (4) is installed on the top of the shell (1), and a manhole (3) is installed outside the gas separation zone.

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