Explosion-proof gas-liquid separation structure of explosion-proof refrigerant recovery equipment

Abstract

The utility model discloses an explosion-proof type gas-liquid separation structure of explosion-proof refrigerant recovery equipment, which comprises a tank body, one side of the lower part of the tank body is fixedly communicated with a gas inlet pipe, one side of the upper part of the tank body is fixedly communicated with a gas outlet pipe, the bottom of the tank body is fixedly communicated with a liquid discharge pipe, and a plurality of umbrella type separators are fixedly arranged on the inner wall of the tank body from bottom to top. A wire mesh demister is fixedly mounted on the inner wall of the tank body and is positioned at the gas outlet pipe; a first static elimination part is mounted in the tank body and is positioned at the air inlet pipe; and a second static electricity eliminating part is mounted in the tank body and is positioned between two adjacent umbrella type separators. The first static electricity elimination component and the second static electricity elimination component are used in cooperation, comprehensive and efficient static electricity elimination is achieved in the whole process of input and separation of refrigerants, and the operation safety of equipment is enhanced.

Description

Technical Field

[0001] This utility model belongs to the technical field of gas-liquid separation equipment, specifically relating to an explosion-proof gas-liquid separation structure for an explosion-proof refrigerant recovery device. Background Technology

[0002] Refrigerants are widely used in refrigeration and air conditioning systems. However, with increasing environmental awareness and a greater emphasis on safe production, the importance of explosion-proof refrigerant recovery equipment is becoming increasingly prominent. On the one hand, refrigerant leaks can damage the atmospheric environment; for example, some fluorinated refrigerants can cause ozone layer depletion and exacerbate the greenhouse effect. On the other hand, in flammable and explosive environments, refrigerant leaks can even trigger serious safety accidents, threatening lives and property. Therefore, efficient and safe explosion-proof refrigerant recovery equipment has become an urgent need for the industry.

[0003] Patent CN220276526U discloses a gas-liquid separator, including a tank body, a feed pipe disposed on the tank body and connected to the tank body; a top plate fixedly connected to the inner wall of the tank body, and a first baffle fixedly connected to the top plate; a second baffle fixedly connected to the top inner wall of the tank body, and a flow channel formed between the first baffle and the second baffle; a first filter hole disposed on the top plate; and an exhaust pipe disposed on the top of the tank body.

[0004] The aforementioned technical solution increases the path of gas flow and circulation within the tank, thereby increasing the gas circulation time within the tank and improving the efficiency and effect of gas-liquid separation. However, the aforementioned gas-liquid separator does not have an anti-static mechanism in actual use. During the gas-liquid separation process, the refrigerant flow state is complex, and the high-speed impact of the gas-liquid mixture on the internal components of the equipment easily generates static electricity. Especially for some flammable refrigerants, such as hydrocarbon refrigerants (R290, R600a, etc.), static electricity accumulates to a certain level and is prone to discharge, which can easily ignite the surrounding flammable gases and cause an explosion, resulting in low safety performance of the equipment. Utility Model Content

[0005] The purpose of this invention is to provide an explosion-proof gas-liquid separation structure for an explosion-proof refrigerant recovery device, in order to solve the technical defects of existing gas-liquid separators that do not have an anti-static mechanism during actual use, which can easily cause an explosion due to the accumulation of static electricity in the tank, resulting in low safety performance of the equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An explosion-proof gas-liquid separation structure for an explosion-proof refrigerant recovery device includes a tank. An inlet pipe for refrigerant input is fixedly connected to one side of the lower portion of the tank. An outlet pipe is fixedly connected to one side of the upper portion of the tank. A drain pipe is fixedly connected to the bottom of the tank. Multiple umbrella-shaped separators are fixedly installed on the inner wall of the tank from bottom to top. A wire mesh demister is fixedly installed on the inner wall of the tank, located at the outlet pipe. A first static electricity elimination component is installed inside the tank, located at the inlet pipe. A second static electricity elimination component is installed inside the tank, located between two adjacent umbrella-shaped separators.

[0008] As a further embodiment of this utility model, the first static elimination component includes a baffle plate, which blocks the air inlet port of the air inlet pipe. Multiple conductive foam boards are vertically fixed between the baffle plate and the inner wall of the tank, and the conductive foam boards are provided with flow guide holes.

[0009] As a further embodiment of this utility model, the second static elimination component includes multiple conductive grid plates, which are fixedly installed on the inner wall of the tank, and each conductive grid plate is disposed between two adjacent umbrella-type separators; a grounding wire is fixedly connected to each conductive grid plate, and one end of the grounding wire extends out of the tank and is connected to the grounding device.

[0010] As a further embodiment of this invention, both the outer and inner walls of the tank are coated with an antistatic coating.

[0011] As a further embodiment of this invention, the antistatic coating is an indium tin oxide coating with a coating thickness of 100–300 nm.

[0012] As a further preferred embodiment of this utility model, a liquid level sensor is fixedly installed on the lower inner wall of the tank, and a solenoid valve is fixedly installed on the drain pipe.

[0013] As a further preferred embodiment of this utility model, the electrostatic conductive mesh plate is made of stainless steel with a mesh density of 10-20 meshes.

[0014] Compared with existing technologies, the explosion-proof gas-liquid separation structure of the explosion-proof refrigerant recovery equipment provided by this utility model has the following beneficial effects:

[0015] 1. In this utility model, the baffle of the first static elimination component is positioned at the air inlet port of the air inlet pipe to buffer the speed at which the refrigerant enters the tank and reduce the static electricity generated by the impact. The conductive foam board is vertically installed between the baffle and the inner wall of the tank. On the one hand, it is conductive and can conduct away the static electricity brought by the refrigerant in time. On the other hand, the guide holes opened on the board can guide the refrigerant to disperse and enter the tank evenly, avoiding excessive local flow velocity and generating more static electricity, further improving the static elimination effect. At the same time, it optimizes the initial flow state of the refrigerant in the tank, which is beneficial to the subsequent gas-liquid separation.

[0016] The conductive grid plate of the second static elimination component is fixed to the inner wall of the tank and located between adjacent umbrella separators. It can eliminate static electricity again on the gas-liquid mixture after the initial separation by the umbrella separator. The conductive grid plate can effectively intercept and conduct static electricity, and the grounding wire introduces static electricity to the ground, ensuring that static electricity will not accumulate inside the tank. It can continuously ensure static electricity safety in the key process of gas-liquid separation.

[0017] By using the first and second static elimination components together, comprehensive and efficient static elimination can be achieved throughout the entire process of refrigerant input and separation, thereby enhancing the safety of equipment operation.

[0018] 2. This utility model uses an indium tin oxide coating on both the outer and inner walls of the tank as an antistatic coating. The inner wall coating prevents the accumulation of static electricity generated by friction between the refrigerant and the inner wall of the tank, while the outer wall coating can avoid the influence of external static electricity on the tank and prevent the static electricity generated by the tank itself from spreading outward. This reduces the risk of explosion from multiple angles and comprehensively ensures the safe operation of the equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional view of the tank in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of the first static electricity elimination component in an embodiment of this utility model.

[0023] Figure label:

[0024] 1. Tank body; 2. Inlet pipe; 3. Outlet pipe; 4. Drain pipe; 401. Solenoid valve; 5. Baffle; 501. Conductive foam board; 502. Flow guide hole; 6. Umbrella separator; 7. Electrostatic conductive mesh plate; 701. Grounding wire; 8. Wire mesh demister; 9. Liquid level sensor; 10. Antistatic coating. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0027] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0028] See appendix Figures 1-3 As shown in the figure, an explosion-proof gas-liquid separation structure for an explosion-proof refrigerant recovery device according to an embodiment of the present invention includes a tank 1. An inlet pipe 2 for refrigerant input is fixedly connected to one side of the lower part of the tank 1, an outlet pipe 3 is fixedly connected to one side of the upper part of the tank 1, a drain pipe 4 is fixedly connected to the bottom of the tank 1, a plurality of umbrella-shaped separators 6 are fixedly installed on the inner wall of the tank 1 from bottom to top, and a wire mesh demister 8 is fixedly installed on the inner wall of the tank 1, with the wire mesh demister 8 located at the outlet pipe 3.

[0029] The tank 1 is equipped with a first static electricity elimination component located at the air inlet pipe 2; the tank 1 is also equipped with a second static electricity elimination component located between two adjacent umbrella-type separators 6.

[0030] The above scheme achieves the basic function of gas-liquid separation by setting an inlet pipe 2 at the bottom of the tank 1 to facilitate refrigerant input, setting an outlet pipe 3 at the top to discharge the separated gas, and setting a drain pipe 4 at the bottom to discharge liquid. Multiple umbrella-type separators 6 are installed from bottom to top, which can use their unique structure to separate the gas-liquid mixture multiple times to improve separation efficiency. A wire mesh demister 8 is installed at the outlet pipe 3 to further remove residual tiny droplets in the gas, making the discharged gas purer. A first static elimination component is set at the inlet pipe 2 to eliminate static electricity when the refrigerant first enters the tank 1, reducing the source of static electricity generation. A second static elimination component is set between adjacent umbrella-type separators 6 to continuously eliminate static electricity during the gas-liquid separation process, effectively reducing the risk of explosion caused by static electricity and enhancing equipment safety.

[0031] The first static electricity elimination component includes a baffle 5, which is positioned at the inlet port of the inlet pipe 2. Multiple conductive foam plates 501 are vertically fixed between the baffle 5 and the inner wall of the tank 1. The conductive foam plates 501 have flow guide holes 502. The baffle 5, positioned at the inlet port of the inlet pipe 2, buffers the speed at which the refrigerant enters the tank 1, reducing static electricity generated by impact. The conductive foam plates 501, vertically installed between the baffle 5 and the inner wall of the tank 1, serve two purposes: firstly, their conductivity allows them to promptly conduct away static electricity generated by the refrigerant; secondly, the flow guide holes 502 on the plates guide the refrigerant to disperse and evenly enter the tank 1, preventing excessively fast local flow rates and further improving the static electricity elimination effect. Simultaneously, it optimizes the initial flow state of the refrigerant within the tank, which is beneficial for subsequent gas-liquid separation.

[0032] The second static elimination component includes multiple conductive grid plates 7, which are fixedly installed on the inner wall of the tank 1, and each conductive grid plate 7 is arranged between two adjacent umbrella-type separators 6; a grounding wire 701 is fixedly connected to each conductive grid plate 7, and one end of the grounding wire 701 extends out of the tank 1 and is connected to the grounding device.

[0033] The electrostatic conductive grid plate 7 is fixed to the inner wall of the tank 1 and located between adjacent umbrella separators 6. It can eliminate static electricity again on the gas-liquid mixture after the initial separation by the umbrella separator 6. The electrostatic conductive grid plate 7 can effectively intercept and conduct static electricity. The grounding wire 701 introduces static electricity to the ground, ensuring that static electricity will not accumulate inside the tank 1. It can continuously ensure static electricity safety in the key process of gas-liquid separation.

[0034] Both the outer and inner walls of the tank 1 are coated with an antistatic coating 10, which further prevents the accumulation of static electricity in all aspects. The inner wall coating prevents the accumulation of static electricity generated by the friction between the refrigerant and the inner wall of the tank 1, while the outer wall coating can avoid the influence of external static electricity on the tank 1 and prevent the static electricity generated by the tank 1 itself from spreading outward. This improves the antistatic capability at the overall equipment level, reduces the risk of explosion from multiple angles, and enhances the safety and reliability of the equipment.

[0035] The antistatic coating 10 is an indium tin oxide coating with a coating thickness of 100-300 nm. By selecting an indium tin oxide coating as the antistatic coating, its high conductivity can quickly and effectively dissipate static electricity. The preferred coating thickness is 200 nm. This coating thickness can achieve a good balance between cost and the firmness of the bond with the tank while ensuring good antistatic performance. It meets the requirements of the equipment for electrostatic protection and also takes into account other performance and economic factors.

[0036] A liquid level sensor 9 is fixedly installed on the lower inner wall of tank 1, and a solenoid valve 401 is fixedly installed on drain pipe 4. The liquid level sensor 9, installed on the lower inner wall of tank 1, can monitor the liquid level in tank 1 in real time. The solenoid valve 401 on drain pipe 4 can automatically control the drainage based on the signal from the liquid level sensor 9. When the liquid level reaches the set height, the solenoid valve 401 opens to drain the liquid, avoiding problems such as excessive liquid affecting the gas-liquid separation effect or causing liquid overflow. This achieves automatic and precise control of the liquid level inside tank 1, ensuring stable and efficient operation of the equipment.

[0037] The conductive mesh plate 7 is made of stainless steel with a mesh density of 10-20 mesh. With good mechanical strength and corrosion resistance, it can be used stably for a long time in the complex working environment of refrigerants. The preferred mesh density is 15 mesh. This mesh density range can ensure sufficient electrostatic discharge area to effectively intercept and discharge static electricity, without excessively hindering the flow of gas-liquid mixtures. While ensuring the electrostatic elimination function, it does not affect the gas-liquid separation efficiency, so that the equipment achieves a good synergistic effect in electrostatic protection and gas-liquid separation performance.

[0038] It is worth noting that the umbrella-type separator 6 and the wire mesh demister 8 are both conventional technologies. The working principles and wiring methods of the solenoid valve 401, the liquid level sensor 9, and the grounding wire 701 are conventional technologies or common knowledge, and those skilled in the art can arbitrarily select and match their models according to their needs or convenience.

[0039] In this embodiment of the invention, the refrigerant enters the tank 1 through the inlet pipe 2. At the inlet port, the baffle 5 acts as a buffer, reducing the flow rate of the refrigerant as it enters the tank 1 and minimizing static electricity generated by high-speed impact. The refrigerant then passes through the guide holes 502 on the conductive foam plate 501. The conductive foam plate 501 is conductive and can promptly conduct away the static electricity carried by the refrigerant, enabling the first static elimination component to eliminate static electricity as soon as the refrigerant enters the tank 1, reducing the source of static electricity generation. At the same time, the guide holes 502 guide the refrigerant to disperse and uniformly enter the tank 1, optimizing the initial flow state of the refrigerant in the tank 1 and creating favorable conditions for subsequent gas-liquid separation. After preliminary static elimination and guidance, the refrigerant flows upward and encounters multiple umbrella-type separators 6 fixedly installed from bottom to top on the inner wall of the tank 1. The umbrella-type separators 6 utilize the principles of inertial separation and gravity settling. When the gas-liquid mixture impacts the umbrella plates of the umbrella-type separators 6, due to the gas and liquid... Due to different inertia, the liquid flows along the surface of the umbrella plate under the action of inertia. Under the action of gravity, the liquid will gradually gather and drip down along the edge of the umbrella plate, realizing the initial separation of gas and liquid. Between two adjacent umbrella separators 6, an electrostatic conductive mesh plate 7 is set as a second electrostatic elimination component. The electrostatic conductive mesh plate 7 can effectively intercept and conduct away the static electricity generated by the gas-liquid mixture during the flow and separation process. The static electricity is introduced to the ground through the grounding wire 701 to ensure continuous electrostatic safety in the key link of gas-liquid separation. After the gas-liquid mixture is separated by the multi-stage umbrella separator, the gas continues to rise. The rising gas reaches the gas outlet pipe 3, where a wire mesh demister 8 is installed. The wire mesh demister can further remove the residual tiny droplets in the gas, making the discharged gas purer. Its working principle is that when the gas passes through the wire mesh, the droplets collide with the wire mesh filaments and adhere to the wire mesh. The droplets continuously gather and grow, and fall down along the wire mesh under the action of gravity, thereby realizing the capture of tiny droplets in the gas.

[0040] In addition to the first and second static elimination components, the outer and inner walls of the tank 1 are coated with an indium tin oxide coating as an antistatic coating 10. The inner wall coating prevents the accumulation of static electricity generated by the friction between the refrigerant and the inner wall of the tank 1, while the outer wall coating can prevent the influence of external static electricity on the tank 1 and prevent the static electricity generated by the tank 1 itself from spreading outward. This reduces the risk of explosion from multiple angles and ensures the safe operation of the equipment in all aspects.

[0041] The foregoing has shown and described the basic principles of the present invention. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. An explosion-proof gas-liquid separation structure of an explosion-proof refrigerant recovery apparatus, characterized by comprising: The tank includes a tank body (1), with an inlet pipe (2) for refrigerant input fixedly connected to one side of the lower part of the tank body (1), an outlet pipe (3) fixedly connected to one side of the upper part of the tank body (1), a drain pipe (4) fixedly connected to the bottom of the tank body (1), a plurality of umbrella-shaped separators (6) fixedly installed from bottom to top on the inner wall of the tank body (1), and a wire mesh demister (8) fixedly installed on the inner wall of the tank body (1), with the wire mesh demister (8) located at the outlet pipe (3). The tank (1) is equipped with a first static electricity elimination component, which is located at the air inlet pipe (2). The tank (1) is equipped with a second static elimination component, which is located between two adjacent umbrella-type separators (6).

2. The explosion-proof gas-liquid separation structure of the explosion-proof refrigerant recovery apparatus according to claim 1, characterized by comprising: The first static elimination component includes a baffle (5), which blocks the air inlet port of the air inlet pipe (2). Multiple conductive foam boards (501) are vertically fixed between the baffle (5) and the inner wall of the tank (1). The conductive foam board (501) has a flow guide hole (502).

3. The explosion-proof gas-liquid separation structure of the explosion-proof refrigerant recovery apparatus according to claim 2, characterized in that: The second static elimination component includes multiple static-dissipating mesh plates (7), which are fixedly installed on the inner wall of the tank (1), and each static-dissipating mesh plate (7) is disposed between two adjacent umbrella-type separators (6); A grounding wire (701) is fixedly connected to each of the single electrostatic conductive mesh plates (7), and one end of the grounding wire (701) extends out of the tank body (1) and is connected to the grounding device.

4. The explosion-proof gas-liquid separation structure of the explosion-proof refrigerant recovery apparatus according to claim 3, characterized by comprising: The outer and inner walls of the tank (1) are coated with an antistatic coating (10).

5. The explosion-proof gas-liquid separation structure of the explosion-proof refrigerant recovery apparatus according to claim 4, characterized in that: The antistatic coating (10) is an indium tin oxide coating with a coating thickness of 100-300 nm.

6. The explosion-proof gas-liquid separation structure of an explosion-proof refrigerant recovery device according to claim 1, characterized in that: A liquid level sensor (9) is fixedly installed on the lower inner wall of the tank (1), and a solenoid valve (401) is fixedly installed on the drain pipe (4).

7. The explosion-proof gas-liquid separation structure of the explosion-proof refrigerant recovery apparatus according to claim 3, characterized by comprising: The electrostatic conductive mesh plate (7) is made of stainless steel and has a mesh density of 10 to 20 meshes.

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