Dehumidifying filter cartridge for use with a wet filter

Abstract

The utility model belongs to gas filter device technical field, concretely relates to a dehumidification filter cartridge used in wet filter, it includes an outer cylinder, is equipped with the inner cylinder for adsorbing filter in the outer cylinder, its key lies in, still be equipped with a condensing pipeline in the outer cylinder, the import of this condensing pipeline is equipped with orifice, is connected with expansion cavity behind orifice. The device utilizes the gas from the back level filtration system, throttles through orifice and expands in expansion cavity after cooling, forms low temperature surface on the outer wall of condensing pipeline. At the same time, the humid gas of waiting for filtering enters from primary air inlet, impacts the low temperature surface and thus occurs efficient condensation dehumidification, significantly improves the gas filtration quality.

Description

Technical Field

[0001] This utility model relates to a dehumidifying filter cartridge used in conjunction with a wet filter, belonging to the technical field of gas filtration devices. Background Technology

[0002] In applications such as air respirators, precision instruments, and pneumatic tools, the purity and dryness of compressed air are critical. High-pressure air filtration systems are a core component in ensuring air supply quality. Existing technologies typically employ multi-stage filtration devices; for example, one or more post-filter cartridges are connected in series after a wet filter to further remove moisture and impurities that may have been carried away by the wet filter.

[0003] Some designs use baffles or deflectors to forcefully change the airflow direction, causing water droplets in the airflow to condense upon impact with the wall due to inertia. However, this method has limited effectiveness in removing tiny water vapor in aerosol form.

[0004] The filter cartridge of this application is an important component of a high-pressure air filtration system. It is used in series with a wet filter to remove moisture carried out by the wet filter and improve the dehumidification effect. Utility Model Content

[0005] This invention provides a dehumidifying filter cartridge for use with a wet filter, which is used to distribute the filtration burden of the system, improve the dehumidification effect, and ensure the air supply quality of the air respirator.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A dehumidifying filter cartridge for use in conjunction with a wet filter, characterized in that it comprises: A vertically arranged outer cylinder, the interior of which forms a filter chamber; An inner cylinder is located inside the outer cylinder, and a filter element for adsorption filtration is provided inside the inner cylinder. It also includes a condensation pipe located between the outer cylinder and the inner cylinder; The inlet end of the condenser pipe is a secondary air inlet, after which a throttling orifice is provided, and an expansion chamber is connected behind the throttling orifice; the expansion chamber is used to provide expansion space for the gas after it has been throttled by the throttling orifice, and serves as the main condensation surface; The outer cylinder is provided with a primary air inlet, the position of which corresponds to the position of the expansion chamber, and is used to guide the humid gas to be filtered to impact the outer wall of the expansion chamber; The bottom of the outer cylinder is sealed by a lower end cover, which is provided with a drain outlet for draining condensate.

[0007] The secondary air inlet is connected to the clean gas outlet in the downstream system of the dehumidifying filter cartridge, and is used to introduce clean dry gas into the system.

[0008] Preferably, the bottom end of the condenser pipe has a V-shaped structure, and the tip of the V-shaped structure is tilted to one side to offset the bottom of the inner cylinder, which facilitates the dripping of condensate and the replacement of the filter element in the inner cylinder.

[0009] Preferably, the condensation pipe and expansion chamber are made of copper, which has good thermal conductivity.

[0010] The dehumidifying filter cartridge of this invention is installed in a high-pressure filtration system, located after the wet filter and before the subsequent fine filter cartridge; the secondary air inlet is connected to the air outlet of the subsequent fine filter cartridge.

[0011] The outer cylinder is provided with a detachable upper end cover and a lower end cover at the top and bottom of the outer cylinder, respectively, and the inner cylinder can be removed from the outer cylinder to replace the filter element inside.

[0012] The advantages of this utility model compared with the prior art are: 1. High-efficiency passive dehumidification: This invention creatively utilizes the gas throttling effect, allowing a portion of the high-pressure clean gas in the downstream stage of the system to expand and depressurize through a throttling orifice, causing its temperature to drop sharply and forming a low-temperature condensation surface on the outer wall of the condenser pipe. The mainstream humid gas impacts this condensation surface, causing water vapor to rapidly condense into liquid water, resulting in a dehumidification efficiency far exceeding that of traditional impact-type dehumidification.

[0013] 2. Ingenious system integration: By drawing back the final clean dry gas as the refrigerant, an internal self-cooling cycle is formed, which ingeniously utilizes the system's own energy and has a compact structure.

[0014] 3. Reasonable structure and easy maintenance: Condensate drainage is achieved through a V-shaped inclined structure, effectively preventing secondary contamination of the inner cylinder filter element by condensate. At the same time, the overall structure retains the design of detachable end caps and replaceable inner cylinder, facilitating daily maintenance and filter element replacement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of this utility model; Figure 2 yes Figure 1 A magnified view of part A in the middle; Figure 3 It is a three-dimensional view of the inner cylinder and the top cover; Figure 4 This is a side view of the inner cylinder together with the top cover; Figure 5 This is a schematic diagram of the present invention used in a high-pressure filtration system.

[0016] In the diagram: 1. Top cover; 2. Secondary air inlet; 3. Throttling orifice; 4. Primary air inlet; 5. Expansion chamber; 6. Outer cylinder; 7. Condensation pipe; 8. Bottom cover; 9. Drain outlet; 10. Filter element; 11. Inner cylinder; 12. Porous filter media; 13. Secondary air outlet; 14. Primary air outlet; 15. Wet filter; 16. Dehumidifying filter cartridge; 17. Post-stage fine filter cartridge. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments.

[0018] The description of this utility model is merely a structural or even functional description of the embodiments, and the scope of this utility model is not limited by the embodiments described herein.

[0019] like Figures 1-5 As shown, this embodiment is achieved through the following technical solution: This utility model provides a dehumidifying filter cartridge for use with a wet filter, also referred to as dehumidifying filter cartridge 16 in the filtration system. Its overall structure includes a vertical outer cylinder 6, with a detachable upper end cap 1 and a lower end cap 8 connected to its top and bottom ends respectively via threads or snaps. Inside the outer cylinder 6 is a coaxial inner cylinder 11, filled with a filter element 10.

[0020] A condenser pipe 7 is installed in the space between the outer cylinder 6 and the inner cylinder 11. The upper end of the condenser pipe 7 is a secondary air inlet 2, which is connected to a throttling orifice 3. After the throttling orifice 3, the pipe diameter expands, forming an expansion chamber 5. The entire condenser pipe 7 extends downwards along the cylinder wall, forming a V-shaped structure at its bottom end. The tip of the V-shape tilts to one side, pointing towards the inner wall of the outer cylinder 6. The end of the condenser pipe 7 is a secondary air outlet 13, used to discharge gas.

[0021] A primary air inlet 4 is provided on the upper side wall of the outer cylinder 6, positioned directly opposite the outer wall of the expansion chamber 5. The upper end cover 1 has a primary air outlet 14, which communicates with the upper end of the inner cylinder 11. The lower end cover 8 has a drain outlet 9 for draining collected condensate. A porous filter media 12, filled with absorbent packing, can be selectively installed at the outlet end of the inner cylinder 11 for further filtration.

[0022] The application of the dehumidifying filter cartridge 16 of this utility model in a high-pressure filtration system is as follows: it is installed after the primary wet filter 15 and before the subsequent fine filter cartridge 17.

[0023] The working principle of this utility model is as follows: The high-pressure, clean, and dry gas following the final stage fine filter cartridge 17 is drawn back and enters the condenser line 7 through the secondary inlet 2. As this high-pressure gas passes through the small throttling orifice 3, its pressure drops sharply, and it then expands rapidly within the expansion chamber 5. This adiabatic throttling expansion process causes the gas temperature to decrease. This low-temperature gas continues to flow downwards along the condenser line 7, creating a continuously low-temperature surface on the outer wall of both the expansion chamber 5 and the condenser line 7. The low-temperature gas is finally discharged from the secondary outlet 13.

[0024] High-pressure humid gas, carrying a large amount of water vapor, exits from the pre-filter 15 and enters the filter cartridge through the primary inlet 4. Since the inlet 4 faces the outer wall of the low-temperature expansion chamber 5, the high-speed humid airflow violently impacts its surface. The water vapor in the airflow rapidly condenses into liquid water droplets upon cooling, adhering to the outer walls of the expansion chamber 5 and the condenser pipe 7. Under the influence of gravity and the subsequent airflow, the water droplets flow downwards along the pipe walls, eventually dripping to the bottom of the outer cylinder 6 and being periodically discharged through the drain port 9.

[0025] After efficient condensation and dehumidification, the relatively dry gas flows upward and enters the bottom of the inner cylinder 11, passing through the filter element 10 for final adsorption filtration. Finally, the clean and dry gas flows out from the primary outlet 14 at the top and enters the subsequent fine filter cartridge 17.

[0026] The above structure greatly improves the efficiency of moisture removal from compressed air, ensuring the performance of the entire filtration system and the quality of the final air supply.

[0027] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A dehumidifying filter cartridge for use in conjunction with a wet filter, characterized in that, include: A vertically arranged outer cylinder (6) forms a filter chamber inside; An inner cylinder (11) is located inside the outer cylinder (6), and a filter element (10) for adsorption filtration is provided inside it. It also includes a condenser pipe (7) located between the outer cylinder (6) and the inner cylinder (11). The inlet end of the condenser pipe (7) is a secondary air inlet (2), and a throttling orifice (3) is provided thereafter. An expansion chamber (5) is connected behind the throttling orifice (3). The outer cylinder (6) is provided with a primary air inlet (4), the position of which corresponds to the position of the expansion chamber (5), and is used to guide the wet gas to be filtered to impact the outer wall of the expansion chamber (5); The bottom of the outer cylinder (6) is sealed by a lower end cover (8), and the lower end cover (8) is provided with a drain outlet (9) for draining condensate.

2. The dehumidifying filter cartridge for use with a wet filter according to claim 1, characterized in that, The secondary air inlet (2) is connected to the clean gas outlet in the downstream system of the dehumidification filter cartridge, and is used to introduce clean dry gas into the system.

3. The dehumidifying filter cartridge for use with a wet filter according to claim 1, characterized in that, The bottom end of the condenser pipe (7) is V-shaped, and the tip of the V-shaped structure is tilted to one side to offset the bottom of the inner cylinder (11), so as to facilitate the dripping of condensate and the replacement of the filter element (10) inside the inner cylinder (11).

4. The dehumidifying filter cartridge for use with a wet filter according to claim 1, characterized in that, The condenser pipe (7) and expansion chamber (5) are made of copper.

5. The dehumidifying filter cartridge for use with a wet filter according to any one of claims 1 to 4, characterized in that, It is installed in a high-pressure filtration system, after the wet filter (15) and before the subsequent fine filter cartridge (17); the secondary air inlet (2) is connected to the air outlet of the subsequent fine filter cartridge (17).

6. The dehumidifying filter cartridge for use with a wet filter according to claim 1, characterized in that, The outer cylinder (6) is provided with a detachable upper end cover (1) and a lower end cover (8) at the top and bottom respectively, and the inner cylinder (11) can be removed from the outer cylinder (6) to replace the filter element (10) inside.

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