Gas-liquid separation demisting device for salt spray test box

Abstract

The utility model relates to the technical field of salt spray test boxes, in particular to a gas-liquid separation demisting device for a salt spray test box, which comprises a test box main body, an arched box cover is arranged at the top of the test box main body, and a flow guide cavity cover is arranged in the arched box cover. A cyclone separation assembly, a multi-stage filter screen assembly and a gas uniform distribution assembly composed of a plurality of arc-shaped rectifying plates are sequentially installed in the flow guide cavity cover from bottom to top, the cyclone separation assembly is composed of a flow guide support and a plurality of flow guide blades, and the multi-stage filter screen assembly is composed of a coarse filter screen layer and a fine filter screen layer which are stacked up and down; and an annular hydrophobic collecting tank is arranged between the cyclone separation assembly and the multi-stage filter screen assembly in the arched box cover. According to the gas-liquid separation demisting device for the salt spray test box, the gas-liquid separation efficiency is effectively improved, the demisting blind area is reduced, the secondary entrainment phenomenon can be prevented, and the risk of system corrosion and blockage is remarkably reduced.

Description

A gas-liquid separation and demisting device for a salt spray test chamber Technical Field

[0001] This utility model relates to the technical field of salt spray test chambers, specifically to a gas-liquid separation and demisting device for a salt spray test chamber. Background Technology

[0002] Salt spray testing is a crucial method for evaluating the corrosion resistance of products under salt spray conditions. During operation, a salt solution is sprayed through nozzles to form fine salt spray particles, which diffuse within the chamber and act on the surface of the tested sample to simulate the harsh atmospheric environment of a marine or coastal area. However, after or during the test, salt spray gas can easily remain inside the chamber and at the air vents. If not removed promptly, this can cause cross-contamination in subsequent tests.

[0003] Existing salt spray test chambers are mostly equipped with simple filter screens or activated carbon adsorption structures to remove residual salt spray. Although these structures can achieve preliminary gas-liquid separation to a certain extent, their separation efficiency is low and they cannot completely remove the tiny droplets in the salt spray. As a result, the gas flowing out of the system still contains a certain amount of salt, which can easily cause system corrosion and blockage with long-term use. At the same time, most existing demisters are installed directly at the air outlet outside the test chamber, without fully considering the problem of demister dead zones caused by the uneven distribution of salt spray inside the test chamber, making it difficult to achieve a comprehensive and efficient gas-liquid separation effect. Summary of the Invention

[0004] The purpose of this invention is to provide a gas-liquid separation demisting device for a salt spray test chamber, so as to solve the problems mentioned in the background art, such as low demisting efficiency, inability to completely remove tiny salt spray droplets, easy system corrosion and blockage, and the existence of demisting dead zones in current salt spray test chambers.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gas-liquid separation and demisting device for a salt spray test chamber, comprising a test chamber body, an arched cover on the top of the test chamber body, a flow guide hood inside the arched cover, and a gas distribution assembly consisting of a cyclone separation component, a multi-stage filter assembly, and several arc-shaped rectifier plates installed sequentially from bottom to top inside the flow guide hood. The cyclone separation component consists of a flow guide bracket and several flow guide blades. The multi-stage filter assembly consists of a coarse filter layer and a fine filter layer stacked on top of each other. Furthermore, an annular hydrophobic collection groove is provided inside the arched cover between the cyclone separation component and the multi-stage filter assembly.

[0006] Preferably, the flow guide cavity cover adopts a conical shrinking structure, with its upper diameter being smaller than its lower diameter, and the outer wall of the flow guide cavity cover is provided with multiple reinforcing ribs.

[0007] Preferably, the flow guide bracket is distributed in a cross shape at the bottom edge of the flow guide cavity cover, and the flow guide blade is connected in an arc shape between the sides of the flow guide bracket.

[0008] Preferably, the coarse filter layer is a metal wire woven mesh structure with a pore size range of 50-100μm, and the fine filter layer is made of electrostatic electret composite fiber material with a pore size of less than 20μm.

[0009] Preferably, the inner end of the arc-shaped rectifier plate is provided with a snap-fit ​​flange, and a plurality of snap-fit ​​seats matching the snap-fit ​​flange structure are uniformly arranged around the inner wall of the upper end of the flow guide cavity cover.

[0010] Preferably, the bottom of the annular hydrophobic collection tank is provided with multiple drainage ports, and each drainage port of the annular hydrophobic collection tank is connected to a drainage pipe that extends to the outside of the test chamber body.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: the gas-liquid separation demister in the salt spray test chamber effectively improves gas-liquid separation efficiency, reduces demister blind spots, and prevents secondary entrainment, significantly reducing the risk of system corrosion and blockage. The device enhances structural strength and optimizes gas flow paths through the conical contraction structure and reinforcing ribs of the flow guide shroud. The rotating airflow formed by the flow guide bracket and guide vanes in the cyclone separation assembly utilizes centrifugal force to efficiently separate larger droplets. The coarse and fine filter layers in the multi-stage filter assembly efficiently capture droplets of different sizes, ensuring no residual salt in the gas. The design of the annular hydrophobic collection tank and drainage pipe effectively collects and discharges the separated liquid, preventing liquid accumulation from affecting filtration performance. Attached Figure Description

[0012] Figure 1 is a schematic diagram of the structure of a gas-liquid separation and demisting device for a salt spray test chamber according to the present invention.

[0013] Figure 2 is a schematic diagram of the bottom edge structure of the guide cavity cover of a gas-liquid separation and demisting device for a salt spray test chamber according to the present invention.

[0014] Figure 3 is a schematic diagram of the internal side view of the flow guide cavity cover of a gas-liquid separation and demisting device for a salt spray test chamber according to the present invention.

[0015] Figure 4 is a schematic diagram of the connection structure between the arc-shaped rectifier plate and the guide cavity cover of a gas-liquid separation and demisting device for a salt spray test chamber according to the present invention.

[0016] In the diagram: 1. Main body of the test chamber; 2. Arched chamber cover; 3. Flow guide hood; 31. Reinforcing rib; 4. Swirl separation assembly; 41. Flow guide bracket; 42. Flow guide blade; 5. Multi-stage filter assembly; 51. Coarse filter layer; 52. Fine filter layer; 6. Arc-shaped rectifier plate; 61. Snap-fit ​​flange; 62. Socket; 7. Annular hydrophobic collection trough; 71. Drainage pipe. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please refer to Figures 1-4. This utility model provides a technical solution: a gas-liquid separation and demisting device for a salt spray test chamber, including a test chamber body 1. The top of the test chamber body 1 is provided with an arched cover 2. Inside the arched cover 2, there is a flow guide shroud 3. The outer walls on both sides of the bottom end of the flow guide shroud 3 are fitted with connecting locking pins through screw rings. The inner walls on both sides of the lower end of the arched cover 2 are provided with screw interfaces that cooperate with the connecting locking pin structure. An air outlet pipe is provided in the middle of the top of the test chamber body 1. The middle of the top of the flow guide shroud 3 is provided with an embedded hole that matches the structure of the lower end of the air outlet pipe. Inside the flow guide shroud 3, from bottom to top, a cyclone separation component 4, a multi-stage filter assembly 5, and a gas distribution assembly composed of several arc-shaped rectifier plates 6 are installed sequentially. The cyclone separation component 4 consists of a flow guide bracket 41 and several arc-shaped rectifier plates 6. The test chamber consists of several guide vanes 42. The multi-stage filter assembly 5 is composed of a coarse filter layer 51 and a fine filter layer 52 stacked on top of each other. An annular hydrophobic collection groove 7 is located inside the arched cover 2 between the cyclone separation assembly 4 and the multi-stage filter assembly 5. The salt spray gas generated inside the test chamber body 1 can enter the guide cavity hood 3. The gas passes sequentially through the cyclone separation assembly 4, the multi-stage filter assembly 5, and a gas distribution assembly composed of multiple arc-shaped rectifier plates 6. The guide support 41 and guide vanes 42 in the cyclone separation assembly 4 are located at the bottom edge of the guide cavity hood 3, enabling the airflow to rotate. Centrifugal force is used to throw larger droplets in the salt spray towards the cavity wall for initial separation. The gas then enters the multi-stage filter assembly composed of the coarse filter layer 51 and the fine filter layer 52. The mesh component 5 consists of a coarse filter layer 51 that intercepts larger residual droplets and a fine filter layer 52 that further efficiently captures micron-sized fine droplets, thus achieving deep gas-liquid separation. During this process, the annular hydrophobic collection tank 7 effectively collects liquid that falls off the filter and guides it to an external recovery system, preventing liquid accumulation from affecting subsequent filtration. Simultaneously, the gas distribution component formed by the arc-shaped rectifier plate 6 guides the purified gas to flow out evenly, reducing the risk of secondary entrainment caused by local airflow disturbances. Overall, this significantly improves the removal efficiency of droplets of different sizes in salt spray gas, solving the problems of low demisting efficiency, dead zones, easy clogging, and corrosion in existing technologies. This enhances the equipment's operational stability and service life. The guide chamber hood 3 adopts a conical contraction structure, with its upper diameter smaller than its lower diameter. The diameter of the flow guide chamber 3 is such that multiple reinforcing ribs 31 are welded and fixed on its outer wall. This structure allows the salt spray gas to gradually concentrate and accelerate during flow, which helps to improve the uniformity of airflow distribution. At the same time, it enhances the rotation effect of the gas in the cyclone separation component 4 and improves the droplet separation efficiency. The reinforcing ribs 31 effectively improve the overall structural strength and deformation resistance of the flow guide chamber 3. Especially when facing changes in internal air pressure or temperature fluctuations during equipment operation, it can prevent the cavity from deforming, which could lead to poor sealing or structural damage, thus ensuring the long-term stable operation of the device. The flow guide bracket 41 is distributed in a "+" shape at the bottom edge of the flow guide chamber 3, and the flow guide blades 42 are welded and fixedly connected to the sides of the flow guide bracket 41 in an arc shape.The flow guide bracket 41 stably fixes multiple arc-shaped flow guide blades 42 to the bottom of the flow guide chamber 3, so that the salt mist gas entering the flow guide chamber 3 forms a stable rotating airflow under the guidance of the flow guide blades 42, enhancing the centrifugal separation effect. At the same time, the arc-shaped flow guide blades 42 can effectively reduce airflow resistance and improve the smoothness and uniformity of gas flow. The coarse filter layer 51 is a metal wire woven mesh structure with a pore size range of 50-100μm, and the fine filter layer 52 is made of electrostatic electret composite fiber material with a pore size of less than 20μm. This structure uses the coarse filter layer 51 to initially and efficiently intercept larger droplets in the salt mist gas, reducing the droplet concentration in the airflow. Subsequently, the gas enters the fine filter layer 52 with a smaller pore size, utilizing its electrostatic electret properties to efficiently adsorb and capture micron-sized fine mist droplets, achieving deep purification. The two filter layers are stacked to form a multi-stage structure. The filtration system ensures more thorough gas-liquid separation, effectively preventing fine salt spray particles from escaping with the airflow. The inner end of the arc-shaped rectifier plate 6 is equipped with a snap-fit ​​flange 61, and several matching mounting seats 62 are evenly arranged around the inner wall of the upper end of the guide chamber cover 3. This structure enables rapid positioning and installation of the arc-shaped rectifier plate 6 through the cooperation between the snap-fit ​​flange 61 and the mounting seats 62, ensuring the rectifier plate remains stable and does not shift under airflow. The bottom of the annular hydrophobic collection tank 7 has multiple drainage ports, and each drainage port of the annular hydrophobic collection tank 7 is connected to a drainage pipe 71 that extends to the outside of the test chamber body 1. This structure effectively collects droplets falling from the filter layer through the annular hydrophobic collection tank 7 and guides the liquid into the corresponding drainage pipe 71 through multiple evenly distributed drainage ports, allowing the separated salt spray liquid to be promptly discharged into the test chamber, facilitating centralized liquid recovery.

[0019] Working principle: When using the gas-liquid separation and demisting device for this salt spray test chamber, first open the arched cover 2 on the top of the test chamber body 1. The guide chamber cover 3 is installed in place by connecting locking pins on both sides of the bottom end and the screw interface on the lower inner wall of the arched cover 2, ensuring the overall structure is sealed and stable. The embedded hole in the middle of the top of the guide chamber cover 3 matches the lower end structure of the air outlet pipe in the middle of the top of the test chamber body 1. Then, when the test chamber body 1 is in use, the salt spray gas rises from its inner wall. The salt spray gas first passes through the vortex separation assembly 4 composed of the guide bracket 41 and the arc-shaped guide vanes 42. The airflow forms a rotating motion in this area, and then the gas continues to rise into the multi-stage filter assembly 5 area located in the middle of the flow guide hood 3. It passes through the coarse filter layer 51 and the fine filter layer 52 in sequence to complete two-stage filtration. At the same time, the liquid that falls off the filter is collected by the annular hydrophobic collection tank 7 located below it, and is led out to the outside of the test chamber body 1 through the connecting drainage pipe 71 through multiple drainage ports at the bottom. Then the purified gas enters the upper area of ​​the flow guide hood 3, is guided by the gas distribution assembly composed of several arc-shaped rectifiers 6, and finally flows out from the gas outlet pipe, thus completing a series of operations.

[0020] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A gas-liquid separation and demisting device for a salt spray test chamber, comprising a test chamber body (1), wherein the top of the test chamber body (1) is provided with an arched cover (2), characterized in that: The arched box cover (2) is provided with a flow guide hood (3). The flow guide hood (3) is provided with a gas distribution assembly consisting of a cyclone separation component (4), a multi-stage filter assembly (5) and several arc-shaped rectifier plates (6) installed from bottom to top inside the flow guide hood (3). The cyclone separation component (4) is composed of a flow guide bracket (41) and several flow guide blades (42). The multi-stage filter assembly (5) is composed of a coarse filter layer (51) and a fine filter layer (52) stacked on top of each other. An annular hydrophobic collection groove (7) is provided inside the arched box cover (2) between the cyclone separation component (4) and the multi-stage filter assembly (5).

2. The gas-liquid separation and demisting device for a salt spray test chamber according to claim 1, characterized in that: The flow guide cavity cover (3) adopts a conical shrinkage structure, with its upper diameter being smaller than its lower diameter, and the outer wall of the flow guide cavity cover (3) is provided with multiple reinforcing ribs (31).

3. The gas-liquid separation and demisting device for a salt spray test chamber according to claim 1, characterized in that: The flow guide bracket (41) is distributed in a "+" shape at the bottom edge of the flow guide cavity cover (3), and the flow guide blade (42) is connected in an arc shape between each support of the flow guide bracket (41).

4. The gas-liquid separation and demisting device for a salt spray test chamber according to claim 1, characterized in that: The coarse filter layer (51) is a metal wire woven mesh structure with a pore size range of 50-100μm, and the fine filter layer (52) is made of electrostatic electret composite fiber material with a pore size of less than 20μm.

5. The gas-liquid separation and demisting device for a salt spray test chamber according to claim 1, characterized in that: The inner end of the arc-shaped rectifier plate (6) is provided with a snap-fit ​​flange (61), and a number of snap-fit ​​seats (62) matching the structure of the snap-fit ​​flange (61) are uniformly arranged around the inner wall of the upper end of the flow guide cavity cover (3).

6. The gas-liquid separation and demisting device for a salt spray test chamber according to claim 1, characterized in that: The bottom of the annular hydrophobic collection tank (7) is provided with multiple drainage ports, and each drainage port of the annular hydrophobic collection tank (7) is connected to a drainage pipe (71) that extends through to the outside of the test chamber body (1).

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