Gas-liquid separator

Abstract

The gas-liquid separator comprises a separator body, a filter part and a gas-liquid separation mechanism, the separator body is provided with a first gas inlet end, a liquid discharge end and a third gas outlet end, the third gas outlet end and the liquid discharge end are oppositely arranged, and the first gas inlet end is arranged on the side wall of the separator body; the filter part is arranged in the separator body and is opposite to the first air inlet end; and the gas-liquid separation mechanism is arranged in the separator body and is opposite to the third gas outlet end. Hydrogen is subjected to at least two times of gas-liquid separation from the gas inlet end to the gas outlet end, gas-liquid separation is sufficient, the separation effect is good, the filter part and the separator body are easy to install and operate, the occupied space is small, and the gas-liquid separator has the advantages of being simple in structure, convenient to install and operate and good in separation effect.

Description

Technical Field

[0001] The present application belongs to the technical field of hydrogen preparation, and in particular relates to a gas-liquid separator. Background Art

[0002] Water electrolysis is a highly efficient method for producing high-purity hydrogen, and is widely used due to its environmental and technical advantages. The electrolyzer breaks down the electrolyte to produce hydrogen, which contains a large number of electrolyte gas molecules, requiring interstitial gas-liquid separation.

[0003] In related technologies, gas-liquid separation is achieved by installing multiple staggered baffles within the gas-liquid separator to increase the condensation path. However, the gas-liquid separator is small in size, has limited internal space, is difficult to manufacture, and has a limited number of baffles, resulting in poor gas-liquid separation. Utility Model Content

[0004] The embodiments of the present application provide a gas-liquid separator to solve the problems of difficult processing and poor separation effect of existing gas-liquid separators.

[0005] The present invention provides a gas-liquid separator, comprising:

[0006] A separator body, wherein the separator body is provided with a first air inlet end, a liquid discharge end and a third air outlet end, the third air outlet end and the liquid discharge end are arranged opposite to each other, and the first air inlet end is arranged on the side wall of the separator body;

[0007] A filter element is disposed in the separator body, and the filter element is disposed opposite to the first air inlet end;

[0008] The gas-liquid separation mechanism is arranged in the separator body, and the gas-liquid separation mechanism is arranged opposite to the third gas outlet end.

[0009] Optionally, the gas-liquid separation mechanism includes a cyclone plate, a demister and a guide tube, the guide tube and the demister are fixedly connected to the separator body respectively, the cyclone plate is circumferentially installed on the guide tube, and the demister is closer to the gas outlet end than the guide tube.

[0010] Optionally, the demister includes a mounting plate and a plurality of corrugated plates, the mounting plate is fixedly connected to the separator body, the corrugated plates are mounted on the mounting plate, and the corrugated plates are arranged at intervals along the radial direction of the separator body.

[0011] Optionally, a connecting portion is provided at one end of the guide tube close to the demister, and a necking structure is provided at the other end, and the cyclone plate is spirally arranged along the axis of the guide tube.

[0012] Optionally, the gas-liquid separator further includes a drain pipe connected to the drain end, and a drain valve is provided on the drain pipe.

[0013] Optionally, the drain pipe includes a first section and a second section that are connected, the first section is located between the drain end and the drain valve, the second section is located on the side of the drain valve away from the drain end, and the diameter of the first section is larger than the diameter of the second section.

[0014] Optionally, the inner diameter of the first section is D1 and the inner diameter of the second section is D2, D1=a*D2, wherein 1.6≤a≤4.

[0015] Optionally, the inner diameter of the first section is D1, 4mm≤D1≤8mm;

[0016] And / or, the inner diameter of the second section is D2, 1.0 mm ≤ D2 ≤ 2.5 mm.

[0017] Optionally, it further includes: a liquid level detection device, which is arranged in the separator body, and the liquid level detection device is configured to detect the liquid level value in the separator body.

[0018] Optionally, also include:

[0019] The control module, the liquid level detection device and the drain valve are respectively connected to the control module, and the control module is configured as follows:

[0020] receiving the liquid level value generated by the liquid level detection device;

[0021] The discharge valve is controlled to open or close the discharge pipe according to the liquid level value.

[0022] The gas-liquid separator provided in the embodiment of the present application includes a separator body and a filter element and a gas-liquid separation mechanism arranged in the separator body. The filter element is arranged at the air inlet end, and the gas-liquid separation mechanism is arranged at the air outlet end. The hydrogen undergoes at least two gas-liquid separations from the air inlet end to the air outlet end. The gas-liquid separation is sufficient and the separation effect is good. The filter element and the separator body are simple to install and operate and occupy a small space. This overcomes the problems of difficult processing and poor separation effect of existing gas-liquid separators, and has the advantages of simple structure, easy installation and operation, and good separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0024] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0025] Figure 1 This is a schematic structural diagram of the gas-liquid separator provided in an embodiment of the present application.

[0026] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0027] Figure 3 This is a schematic diagram of the principle of the hydrogen generator provided in an embodiment of the present application.

[0028] Figure 4 This is a schematic diagram of the structure of the hydrogen generator provided in an embodiment of the present application.

[0029] Figure 5 This is a control block diagram of the hydrogen generator provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0031] See also Figure 1 As shown, an embodiment of the present application provides a gas-liquid separator 300 , including a separator body 340 , a filter element 350 and a gas-liquid separation mechanism 360 .

[0032] In this embodiment, see Figure 1 The separator body 340 is a cylindrical barrel, and its material is 316 stainless steel that can withstand strong alkali, which can ensure the processing flow of the gas-liquid separator and increase the gas storage volume. The inner diameter of the separator body 340 is 40mm, the height is 80mm, and the overall size is relatively small. The first air inlet end 310, the liquid discharge end 320 and the third air outlet end 330 are arranged on the separator body 340, the first air inlet end 310 is arranged on the side wall of the separator body 340, and the third air outlet end 330 and the liquid discharge end 320 are arranged relative to each other, such as along the axial direction of the barrel, the third air outlet end 330 is arranged at the top of the barrel, and the liquid discharge end 320 is arranged at the bottom of the barrel. The liquid discharge end 320 is arranged at the bottom of the separator body 340, and can rely on gravity to discharge the separated liquid. The liquid discharge speed is fast and it can be emptied.

[0033] In this embodiment, see Figure 1The filter element 350 is disposed within the separator body 340 and is positioned opposite the first air inlet end 310. The filter element 350 can be a high-mesh filter screen made of an alkali-resistant material, such as stainless steel. The mesh size of the filter screen is between 40 and 80 mesh, and the filter screen completely covers the first air inlet end 310. The filter screen is welded to the separator body 340 around the first air inlet end 310, making the filter element 350 easy to install and operate. The hydrogen entering from the first air inlet end 310 is filtered by the filter screen and then enters the separator body 340. The electrolyzed hydrogen passes through the filter element 350 for preliminary water vapor separation.

[0034] In this embodiment, see Figure 1 The gas-liquid separation mechanism 360 is disposed within the separator body 340 and is positioned opposite the third gas outlet 330. After the water vapor separated by the filter element 350 is completely separated by the gas-liquid separation mechanism 360, the hydrogen is discharged from the third gas outlet 330. The gas-liquid separation mechanism 360 is made of an alkali-resistant material, such as stainless steel.

[0035] It can be understood that in this embodiment, a filter element 350 and a gas-liquid separation mechanism 360 are provided in the separator body 340. Rapid preliminary separation is performed through the filter element 350, and then secondary gas-liquid separation is performed through the gas-liquid separation mechanism 360. The gas-liquid separation is sufficient and the separation effect is better, thereby ensuring the purity of the prepared hydrogen.

[0036] In some embodiments, see Figure 1 The gas-liquid separation mechanism 360 includes a cyclone plate 361, a demister 362 and a guide tube 363. The guide tube 363 and the demister 362 are fixedly connected to the separator body 340 respectively. The cyclone plate 361 is circumferentially installed on the guide tube 363. The demister 362 is closer to the third gas outlet end 330 than the guide tube 363.

[0037] As can be understood, in this embodiment, the gas-liquid separation mechanism 360 includes a cyclone plate 361, a demister 362, and a guide tube 363, achieving three-stage gas-liquid separation. The airflow enters the separator body 340 tangentially through the first air inlet 310 and moves in the spaces outside and inside the guide tube 363. The gas on the outside undergoes rotational centrifugal motion through the cyclone plate 361. The inertial centrifugal force can separate larger droplets from the gas, achieving primary gas-liquid separation. Due to the difference in specific gravity between the gas and liquid, the gas moves upward along the inside of the guide tube 363. During the upward movement of the airflow, under the influence of gravity, the upward velocity of slightly larger droplets decreases and eventually produces a downward velocity, achieving secondary gas-liquid separation. After the secondary gas-liquid separation, the gas continues to flow upward through the demister 362 to achieve tertiary gas-liquid separation. Hydrogen produced through multi-stage gas-liquid separation has a better separation effect and a higher purity.

[0038] In some embodiments, see Figure 2 The demister 362 includes a mounting plate 3621 and a plurality of corrugated plates 3622. The mounting plate 3621 is fixedly connected to the separator body 340. The corrugated plates 3622 are mounted on the mounting plate 3621. Along the radial direction of the separator body 340, the plurality of corrugated plates 3622 are arranged in sequence at intervals. It can be understood that the plurality of corrugated plates 3622 are arranged vertically at equal intervals, and a channel for gas to pass through is formed between two adjacent corrugated plates 3622. The channel formed by the corrugated plates 3622 is also wavy, which increases the condensation path. When the gas is discharged through the channel, the gas-liquid molecules collide with the corrugated plates 3622, condense, gather and drip on the corrugated plates, thereby achieving gas-liquid separation with a good separation effect.

[0039] In some embodiments, see Figure 1 The guide tube 363 is a through-cylindrical structure, coaxially arranged with the separator body 340. A connection portion 3631 is provided at one end of the guide tube 363, near the third gas outlet 330. The guide tube 363 is fixedly connected to the inner wall of the separator body 340 via the connection portion. A constriction 3632 is provided at the other end of the guide tube 363 to ensure the passage of gas while condensing the gas and liquid molecules in the gas as much as possible.

[0040] In this embodiment, see Figure 1 The cyclone plate 361 is spirally arranged along the axis of the guide tube 363. The cyclone plate 361 is fixedly connected to the outer wall of the guide tube 363 and is arranged perpendicular to the axis of the guide tube 363. The gas spirals upward along the cyclone plate 361, and the gas and liquid molecules in the gas collide with the cyclone plate 361, condensing and dripping, achieving gas-liquid separation.

[0041] In some embodiments, see Figure 1 The gas-liquid separator 300 further includes a drain pipe 370 connected to the drain end 320, and a drain valve 380 is provided on the drain pipe 370. The drain valve 380 is used to control the drain pipe 370 to be turned on or off, which is easy to operate.

[0042] Based on the above implementation, see Figure 1 The discharge pipe 370 includes a first section 371 and a second section 372 that are connected. The first section 371 is located between the discharge end 320 and the discharge valve 380, and the second section 372 is located on the side of the discharge valve 380 away from the discharge end 320. The diameter of the first section 371 is larger than the diameter of the second section 372.

[0043] It can be understood that the drainage pipe 370 is designed to have two sections with different diameters. The diameter of the section close to the separator body 340 is larger than the diameter of the other end, and the drainage flow is stable, thereby achieving the purpose of noise reduction.

[0044] In some embodiments, see Figure 1 The inner diameter of the first section 371 is D1, and the inner diameter of the second section 372 is D2. D1 = a*D2, where 1.6 ≤ a ≤ 8. The value of a can be 1.6, 2.5, 3.1, 4.0, 5.3, 6.8, 7.5, 8.0, or other unspecified values. The rational design of the inner diameter ratio between the first section 371 and the second section 372 achieves excellent noise reduction.

[0045] In some embodiments, see Figure 1 The inner diameter of the first section 371 is D1, 4 mm ≤ D1 ≤ 8 mm. The value of D1 can be 4 mm, 4.6 mm, 5.0 mm, 5.5 mm, 6.1 mm, 7.0 mm, 7.7 mm, 8 mm, or other unspecified values.

[0046] In some embodiments, see Figure 1 The inner diameter of the second section 372 is D2, 1.0 mm ≤ D2 ≤ 2.5 mm. The value of D1 can be 1.0 mm, 1.3 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.5 mm, or other unspecified values.

[0047] In this embodiment, the inner diameters of the first section 371 and the second section 372 are relatively small, which can achieve good noise reduction while satisfying the need for liquid drainage.

[0048] In some embodiments, see Figure 1 The gas-liquid separator 300 further includes a liquid level detection device 390, which is disposed within the separator body 340. The liquid level detection device 390 may be a liquid level gauge configured to detect the liquid level within the separator body 340. The liquid level detected by the liquid level detection device 390 can be used to control the opening or closing of the drain valve 380, thereby achieving gravity emptying. The emptying time is selectable, which is convenient for operation.

[0049] Based on the above implementation, see Figure 5The gas-liquid separator 300 also includes a control module 700, which can be a PLC controller. The liquid level detection device 390 and the drain valve 380 are respectively connected to the control module 700. The control module 700 is configured to: receive the liquid level value generated by the liquid level detection device 390; and control the drain valve 380 to open or close the drain pipe 370 based on the liquid level value. For example, the control module 700 is provided with a first liquid level threshold and a second liquid level threshold. The first liquid level threshold is greater than the second liquid level threshold. When the detected liquid level value exceeds the first liquid level threshold, the control module 700 controls the drain valve 380 to open the drain pipe 370 and discharge the separated liquid. When the detected liquid level value is lower than the second liquid level threshold, the control module 700 controls the drain valve 380 to close the drain pipe 370 and stop discharging the liquid. Automatically controlling the drain valve 380 to open or close based on the liquid level value is simple to operate and has a high degree of automation.

[0050] The gas-liquid separator 300 of the above embodiment can be applied to the hydrogen generator 10 . The specific structure of the hydrogen generator 10 will be described in detail below with reference to the accompanying drawings.

[0051] See also Figure 3 and Figure 4 An embodiment of the present application provides a hydrogen generator 10 , comprising an electrolytic cell 100 , an electrolyte tank 200 , a gas-liquid separator 300 of the above embodiment, a purification device 400 and a housing 500 .

[0052] In this embodiment, see Figure 3 The electrolytic cell 100 is an anion exchange membrane electrolytic cell. The electrolytic cell 100 includes a diaphragm disposed in the middle of the electrolytic cell 100, dividing the electrolytic cell 100 into a first sub-cell and a second sub-cell. The first sub-cell and the second sub-cell are connected to the cathode and anode of a power supply, respectively. The diaphragm of the electrolytic cell 100 is an anion exchange membrane, and a non-precious metal, such as nickel, is provided on both sides of the anion exchange membrane as a catalyst. The electrolytic cell 100 is provided with a first liquid inlet 110 and a first liquid outlet 120. The electrolytic cell 100 and the electrolyte tank 200 form an electrolyte circulation system. The electrolyte circulating into the electrolytic cell 100 produces high-purity hydrogen under the catalysis of the anion exchange membrane and the catalyst. The produced hydrogen is discharged from the first gas outlet 130 of the electrolytic cell 100. The anion exchange membrane electrolytic cell 100 has the advantages of high efficiency, low cost, and low water quality requirements.

[0053] In this embodiment, see Figure 3The electrolyte barrel 200 is used to store electrolyte and has a second liquid inlet 210, a second liquid outlet 220, a liquid injection port 230, and a second gas outlet 240. The first liquid inlet 110 and the second liquid outlet 220 are connected by a pipeline, and the first liquid outlet 120 and the second liquid inlet 210 are connected by a pipeline, forming an electrolyte circulation system. Oxygen generated during the electrolysis of the electrolyte is discharged from the second gas outlet 240. Electrolyte can be replenished in the electrolyte barrel 200 through the liquid injection port 230. In addition, the electrolyte barrel 200 can also be provided with an emptying port for emptying the electrolyte in the electrolyte barrel 200.

[0054] In this embodiment, see Figure 3 The gas-liquid separator 300 is provided with a first gas inlet end 310, a liquid discharge end 320, and a third gas outlet end 330. The first gas inlet end 310 is connected to the first gas outlet end 130 via a pipeline. The hydrogen generated by the electrolytic cell 100 is discharged through the first gas outlet end 130 and enters the gas-liquid separator 300 from the first gas inlet end 310. The gas-liquid separator 300 separates the trace water vapor mixed in the hydrogen, and the separated liquid is discharged from the liquid discharge end 320. The liquid discharge end 320 can be connected to the electrolyte tank 200 for reuse, or it can be connected to a waste liquid tank.

[0055] In this embodiment, see Figure 3 Purification device 400 is provided with a second gas inlet 410 and a fourth gas outlet 420. Third gas outlet 330 is connected to second gas inlet 410 via a pipeline. Fourth gas outlet 420 is used to discharge hydrogen. Purification device 400 includes multiple molecular sieves. After separation by gas-liquid separator 300, hydrogen enters purification device 400 for drying, adsorption of impurities, and removal of oxygen, thereby producing dry, high-purity hydrogen.

[0056] In this embodiment, see Figure 3 The housing 500 is a rectangular box structure, and the electrolytic cell 100, the electrolyte tank 200, the gas-liquid separator 300, and the purification device 400 are installed in the housing 500. The housing 500 integrates the electrolytic cell 100, the electrolyte tank 200, the gas-liquid separator 300, and the purification device 400 into one body, making the hydrogen generator 10 compact, lightweight, and highly portable.

[0057] As will be appreciated, the hydrogen generator in this embodiment includes an electrolytic cell 100, an electrolyte tank 200, a gas-liquid separator 300, and a purification device 400, all integrated within a housing 500. The electrolytic cell 100 and the electrolyte tank 200 form an electrolyte circulation system. The diaphragm of the electrolytic cell 100 utilizes an anion exchange membrane. The electrolyte is electrolyzed by the anion exchange membrane and the catalyst to produce high-purity hydrogen, resulting in high electrolysis efficiency. The anion exchange membrane has low requirements for electrolyte water quality, allowing the use of pure water, reducing equipment investment and maintenance costs. This offers the advantages of high efficiency, low cost, and low water quality requirements.

[0058] In some embodiments, see Figure 4 The hydrogen generator 10 further includes a power supply 600 , which is electrically connected to the electrolyzer 100 and disposed within the housing 500 . The power supply 600 is configured to supply power to the electrolyzer. The power supply 600 is a DC power supply. Integrating the power supply 600 within the housing 500 facilitates the overall transfer of the hydrogen generator 10 , improving portability and widening its applicability. Alternatively, the power supply 600 may be disposed outside the housing 500 .

[0059] In some embodiments, see Figure 3 and Figure 4 The hydrogen generator further includes a flow display module 800, which can be a flow meter. The flow display module 800 is disposed on the outlet pipe 430 connected to the fourth outlet port 420 and is used to display the flow value of the hydrogen flowing out of the purification device 400.

[0060] In some embodiments, see Figure 3 and Figure 4 The hydrogen generator further includes a pressure display module 900 , which can be a pressure gauge. The pressure display module 900 is disposed on the gas outlet pipe 430 connected to the fourth gas outlet port 420 , and is used to display the gas pressure value within the purification device 400 .

[0061] By arranging the flow display module 800 and the pressure display module 900 on the gas outlet pipeline 430 , the flow rate change and pressure change of the hydrogen generator can be displayed in real time, which is intuitive and can meet the different needs of users.

[0062] In some embodiments, see Figure 3 and Figure 5The hydrogen generator further includes a pressure switch 440 and a control module 700. The pressure switch 440 has a pressure detection function. The pressure switch 440 is disposed on the gas outlet pipeline 430 connected to the fourth gas outlet port 420. The pressure switch 440 is configured to detect the pressure within the purification device 400 and the gas outlet pipeline 430. The pressure switch 440 is connected to the control module 700. The control module 700 is configured to control the pressure switch 440 to transmit a signal to the control module 700 based on the pressure value, thereby controlling the power supply 600 to be powered on or off.

[0063] Exemplarily, a pressure threshold is provided within the control module 700, and the pressure threshold includes an upper pressure threshold and a lower pressure threshold. When the pressure switch 440 detects that the pressure value exceeds the upper pressure threshold, the control module 700 controls the pressure switch 440 to open and controls the power supply 600 to cut off the power, thereby preventing the electrolyzer 100 from continuously operating and causing excessive pressure, thereby ensuring the safety and service life of the hydrogen generator. When the pressure switch 440 detects that the pressure value is lower than the lower pressure threshold, the control module 700 controls the power supply 600 to supply power, and the electrolyzer 100 resumes operation, thereby ensuring the continuity of hydrogen production and the safety and service life of the product. When the pressure value detected by the pressure switch 440 is between the upper pressure threshold and the lower pressure threshold, the control module 700 controls the power supply 600 to stop supplying power.

[0064] In some embodiments, see Figure 3 A first one-way valve 460 is also provided on the gas outlet pipe 430 to prevent hydrogen backflow and ensure the purity of the hydrogen generated by the hydrogen generator.

[0065] In some embodiments, see Figure 3 A safety valve 470 is also provided on the gas outlet pipe 430. When the pressure value exceeds the set pressure, the safety valve 470 opens to release the pressure, thereby ensuring the safety of the hydrogen generator.

[0066] In some embodiments, see Figure 3 A second one-way valve 250 is provided on the pipeline connecting the first liquid outlet 120 and the second liquid inlet 210. By providing the second one-way valve 250, the electrolyte in the electrolyte barrel 200 is prevented from flowing back into the electrolytic cell 100.

[0067] In some embodiments, the concentration C of the alkaline substance in the electrolyte in the electrolytic cell 100 is such that 0.5 mol / L≤C≤2 mol / L. The value of C may be 0.5 mol / L, 0.8 mol / L, 1.2 mol / L, 1.5 mol / L, 1.9 mol / L, 2 mol / L, or other values ​​not specified.

[0068] In this embodiment, the alkaline concentration of the electrolyte required by electrolytic cell 100 is relatively low, the acid and alkalinity resistance requirements of the materials required for electrolytic cell 100 are low, and the equipment investment and maintenance costs are low. In addition, the voltage of electrolytic cell 100 is between 1.85V and 2.0V, which requires a low voltage and reduces energy consumption.

[0069] In some embodiments, see Figure 4 A heat sink 510 is further provided in the housing 500. The heat sink 510 is a fan, and one or more fans may be provided. The fan may be provided near the electrolytic cell 100 and the control module 700 to dissipate heat from the main heat-generating components, thereby reducing the temperature in the housing 500 and improving the electrolysis efficiency.

[0070] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0071] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features.

[0072] The above is a detailed introduction to the gas-liquid separator provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, based on the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A gas-liquid separator, characterized in that: include: A separator body (340), wherein the separator body (340) is provided with a first air inlet end (310), a liquid discharge end (320), and a third air outlet end (330), wherein the third air outlet end (330) and the liquid discharge end (320) are arranged opposite to each other, and the first air inlet end (310) is arranged on a side wall of the separator body (340); a filter element (350) disposed in the separator body (340), the filter element (350) being disposed opposite to the first air inlet end (310); The gas-liquid separation mechanism (360) is arranged in the separator body (340), and the gas-liquid separation mechanism (360) is arranged opposite to the third gas outlet end (330).

2. The gas-liquid separator according to claim 1, characterized in that The gas-liquid separation mechanism (360) includes a cyclone plate (361), a demister (362) and a guide tube (363). The guide tube (363) and the demister (362) are respectively fixedly connected to the separator body (340). The cyclone plate (361) is circumferentially mounted on the guide tube (363). The demister (362) is closer to the gas outlet end (330) than the guide tube (363).

3. The gas-liquid separator according to claim 2, characterized in that The demister (362) includes a mounting plate (3621) and a plurality of corrugated plates (3622), wherein the mounting plate (3621) is fixedly connected to the separator body (340), and the corrugated plates (3622) are mounted on the mounting plate (3621), and the corrugated plates (3622) are arranged at intervals along the radial direction of the separator body (340).

4. The gas-liquid separator according to claim 2, characterized in that The guide tube (363) is provided with a connecting portion (3631) at one end close to the demister (362), and a constriction structure (3632) at the other end. The cyclone plate (361) is spirally arranged along the axis of the guide tube (363).

5. The gas-liquid separator according to claim 3 or 4, characterized in that: The gas-liquid separator (300) further comprises a liquid discharge pipe (370) in communication with the liquid discharge end (320), and a liquid discharge valve (380) is provided on the liquid discharge pipe (370).

6. The gas-liquid separator according to claim 5, characterized in that The liquid discharge pipe (370) comprises a first section (371) and a second section (372) which are connected to each other. The first section (371) is located between the liquid discharge end (320) and the liquid discharge valve (380), and the second section (372) is located on the side of the liquid discharge valve (380) away from the liquid discharge end (320). The diameter of the first section (371) is larger than the diameter of the second section (372).

7. The gas-liquid separator according to claim 6, characterized in that The inner diameter of the first section (371) is D1 and the inner diameter of the second section (372) is D2, D1=a*D2, wherein 1.6≤a≤4.

8. The gas-liquid separator according to claim 6, characterized in that The inner diameter of the first section (371) is D1, 4mm≤D1≤8mm; And / or, the inner diameter of the second section (372) is D2, 1.0mm≤D2≤2.5mm.

9. The gas-liquid separator according to claim 5, characterized in that: Also includes: A liquid level detection device (390) is disposed in the separator body (340), and the liquid level detection device (390) is configured to detect a liquid level value in the separator body (340).

10. The gas-liquid separator according to claim 9, characterized in that: Also includes: The control module (700), the liquid level detection device (390) and the drain valve (380) are respectively connected to the control module (700), and the control module (700) is configured as follows: receiving the liquid level value generated by the liquid level detection device (390); The discharge valve (380) is controlled to operate according to the liquid level value to open or close the discharge pipe (370).

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