Filter element of filter separator

Abstract

The filter element comprises a first shell and a second shell, the first shell is in threaded connection with the second shell, a connecting ring is fixedly connected to the middle of the upper end face of the first shell, an air outlet is formed in the middle of the lower end face of the second shell, a filter barrel is arranged in an inner cavity of the first shell, and a filter element is arranged in the filter barrel. An annular inner net is transversely and fixedly connected to the bottom of an inner cavity of the filtering barrel, an air inlet pipe is arranged in the middle of the annular inner net in a penetrating mode, the upper portion of the air inlet pipe penetrates and extends into a connecting ring, a sealing device is arranged in the connecting ring, and an annular outer net is fixedly connected to the lower portion of the inner wall of the first shell; the inner wall of the inner ring of the annular outer net is attached to the outer wall of the filter barrel, a polyester filter membrane layer is installed in the middle of an inner cavity of the second shell, the device is simple in structure and convenient to operate, and the quality of natural gas is effectively improved.

Description

Technical Field

[0001] The present disclosure specifically discloses the technical field of filter elements, and in particular relates to a filter element for a filter separator. Background Art

[0002] Natural gas is stored in porous rock formations underground, including oilfield gas, gasfield gas, coalbed methane, mud volcano gas, and biogas, with a small amount also found in coal seams. It is a high-quality fuel and chemical raw material;

[0003] According to application number 201320217057.8, a filter-coalescing filter element for a fuel filter separator is disclosed, comprising a coaxial inner and outer central tubes each having a plurality of small holes formed in the wall, a filter layer positioned between the inner and outer central tubes, a coalescing layer wrapped around the outer side of the outer central tube, and end caps mounted on both ends of the inner central tube to secure the central opening of the coalescing layer. The coalescing layers are composed, from the inside to the outside, of a hydrophilic demulsification layer, a hydrophobic inner coalescing layer, and a hydrophilic outer coalescing layer. During operation, fuel contaminated with water flows into the inner central tube, first passing through the small holes in the inner central tube into the filter layer, where mechanical impurities in the fuel are filtered out, and then passing through the demulsification layer, the inner coalescing layer, and the outer coalescing layer in sequence, where the non-dissolved water contained in the fuel is coalesced into larger particles, forming water droplets.

[0004] Existing natural gas pipelines contain a large amount of moisture and impurities, which greatly shortens the life of the filter elements in the natural gas pipelines, affecting the use of important equipment such as compressors, gas turbines and flow meters. In addition, the filter elements in existing filter separators are difficult to remove, which increases the cost of using the filter elements. Therefore, we propose a filter element for filter separators. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a structure that can collect impurities and facilitate the disassembly and assembly of the filter element.

[0006] A filter separator filter element comprises a first shell and a second shell, the first shell being threadedly connected to the second shell, a connecting ring being fixedly connected to the middle of the upper end surface of the first shell, an air outlet being opened in the middle of the lower end surface of the second shell, a filter barrel being provided in the inner cavity of the first shell, an annular inner net being laterally fixedly connected to the bottom of the inner cavity of the filter barrel, an air inlet pipe being passed through the middle of the annular inner net, the upper part of the air inlet pipe extending to the interior of the connecting ring, a sealing device being provided inside the connecting ring, an annular outer net being fixedly connected to the lower part of the inner wall of the first shell, the inner wall of the inner ring of the annular outer net being in contact with the outer wall of the filter barrel, and a polyester filter membrane layer being installed in the middle of the inner cavity of the second shell.

[0007] According to the technical solution provided in the embodiment of the present application, the outer ring of the lower end surface of the filter barrel is fixedly connected to a collecting barrel, the collecting barrel is funnel-shaped, and a stop valve is provided in the middle of the lower end surface of the collecting barrel.

[0008] According to the technical solution provided in the embodiment of the present application, the sealing device includes an external thread, an internal thread, an arc-shaped groove and a convex strip. The inner wall of the inner cavity of the connecting ring is provided with an internal thread, and the upper part of the outer wall of the intake pipe is provided with an external thread. The external thread is engaged with the internal thread. The upper part of the intake pipe is threadedly connected to the connecting ring. An arc-shaped groove is provided on the lower part of the inner wall of the inner cavity of the connecting ring. A convex strip is fixedly connected to the upper part of the outer wall of the intake pipe, and the convex strip is installed in the inner cavity of the arc-shaped groove.

[0009] According to the technical solution provided in the embodiment of the present application, the arc-shaped groove and the convex strip are both annular, the arc-shaped groove matches the convex strip, and the convex strip is a rubber convex strip.

[0010] According to the technical solution provided in the embodiment of the present application, an activated carbon filter layer is installed on the upper end surface of the annular inner net, and an absorbent cotton filter layer is installed on the upper end surface of the annular outer net.

[0011] According to the technical solution provided in the embodiment of the present application, a limiting ring is fixedly connected to the lower portion of the inner wall of the second shell cavity, and the polyester filter membrane layer is installed on the upper end surface of the limiting ring.

[0012] In summary, the present application discloses a filter element for a filter separator.

[0013] Beneficial effects:

[0014] 1. Through the air inlet pipe, through hole, collection barrel and stop valve, the air inlet pipe can ensure that natural gas flows downward, ensuring that excess water in the natural gas can enter the collection box through the through hole due to gravity. The stop valve can prevent water from entering the second shell, and the stop valve can also prevent natural gas leakage.

[0015] 2. Through the intake pipe, connecting ring, sealing device, first shell and second shell, the external thread and internal thread are matched to ensure that the filter barrel and the first shell are stably connected. Then, through the threaded connection of the first shell and the second shell, the first shell and the second shell are ensured to be disassembled and assembled, which facilitates the replacement of the activated carbon filter layer, the absorbent cotton filter layer and the polyester membrane filter layer, solving the problem that the traditional filter element is difficult to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0017] Figure 1 It is a schematic diagram of the filter element of the filter separator in this application;

[0018] Figure 2 It is a schematic diagram of the cross-sectional structure of the filter element of the filter separator in this application;

[0019] Figure 3 This application Figure 2 Enlarged structural diagram at point A in the middle.

[0020] In the figure: 1. First shell; 2. Second shell; 3. Connecting ring; 4. Air outlet; 5. Air inlet pipe; 6. Filter barrel; 7. Annular inner net; 8. Activated carbon filter layer; 9. Annular outer net; 10. Absorbent cotton filter layer; 11. Collection barrel; 12. Stop valve; 13. Polyester filter membrane layer; 14. External thread; 15. Internal thread; 16. Arc groove; 17. Raised strip; 18. Limiting ring. DETAILED DESCRIPTION

[0021] The present application 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 merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] As mentioned in the background technology, in the prior art, natural gas pipelines contain a large amount of moisture and impurities, which greatly shortens the life of the filter elements in the natural gas pipelines, affecting the use of important equipment such as compressors, gas turbines and flow meters. In addition, the filter elements in the existing filter separators are difficult to remove, which increases the cost of using the filter elements. The present disclosure proposes a structure that can collect impurities and facilitate the disassembly and assembly of the filter elements.

[0024] Example 1

[0025] See also Figure 1 A filter element of a filter separator comprises a first shell 1 and a second shell 2, and the second shell 2 is threadedly connected to the lower part of the outer wall of the first shell 1, and a connecting ring 3 is fixedly connected to the middle part of the upper end surface of the first shell 1, and an air outlet 4 is opened in the middle part of the lower end surface of the second shell 2 to ensure the discharge of filtered natural gas. A filter barrel 6 is provided in the inner cavity of the first shell 1, and the filter barrel 6 is in the shape of a groove with an opening facing upward. An annular inner net 7 is fixedly connected horizontally to the bottom of the inner cavity of the filter barrel 6, and an air inlet pipe 5 is provided through the middle part of the annular inner net 7, and the upper part of the air inlet pipe 5 extends to the inside of the connecting ring 3, and a sealing device is provided inside the connecting ring 3 to ensure the stability of the filter barrel 6.

[0026] See also Figure 2In order to further ensure the stability of the first shell 1, an annular outer net 9 is fixedly connected to the lower part of the inner wall of the first shell 1, and the inner wall of the inner ring of the annular outer net 9 is in contact with the outer wall of the filter barrel 6 to ensure that the first shell 1 will not shake. In order to further filter the natural gas, a polyester filter membrane layer 13 is installed in the middle of the inner cavity of the second shell 2 to ensure the quality of the natural gas.

[0027] See also Figure 2 In order to facilitate the collection of impurities and moisture in natural gas, a collecting barrel 11 is fixedly connected to the outer ring of the lower end surface of the filter barrel 6, and the collecting barrel 11 is funnel-shaped. In order to ensure that impurities and moisture do not enter the inner cavity of the second shell 2, a stop valve 12 is provided in the middle of the lower end surface of the collecting barrel 11. The stop valve 12 can also prevent natural gas leakage. A through hole is opened at the center of the bottom end surface of the filter barrel 6. The through hole ensures that the filter barrel 6 is connected to the collecting barrel 11, which is convenient for collecting impurities and moisture.

[0028] See also Figure 3 In order to ensure the stability of the filter barrel 6 and the sealing of the inner cavity of the first shell 1 and the second shell 2, a sealing device is composed of an external thread 14, an internal thread 15, an arc-shaped groove 16 and a ridge 17. An internal thread 15 is provided on the inner wall of the inner cavity of the connecting ring 3, and an external thread 14 is provided on the upper part of the outer wall of the air intake pipe 5. The external thread 14 is engaged with the internal thread 15. The upper part of the air intake pipe 5 is threadedly connected to the connecting ring 3. An arc-shaped groove 16 is provided on the lower part of the inner wall of the inner cavity of the connecting ring 3, and the arc-shaped groove 16 is annular. A ridge 17 is fixedly connected to the upper part of the outer wall of the air intake pipe 5, and the ridge 17 is installed in the inner cavity of the arc-shaped groove 16.

[0029] See also Figure 3 In order to ensure the sealing of the first shell 1, the arc groove 16 and the ridge 17 are both annular, and the arc groove 16 matches the ridge 17. In order to prevent natural gas leakage, the ridge 17 is a rubber ring, which blocks the gap between the connecting ring 3 and the intake pipe 5, effectively improving the airtightness of the inner cavity of the first shell 1.

[0030] See also Figure 2 In order to perform multi-stage filtration of natural gas, an activated carbon filter layer 8 is installed on the upper end surface of the annular inner net 7, and an absorbent cotton filter layer 10 is installed on the upper end surface of the annular outer net 9. The activated carbon filter layer 8 can absorb impurities in the natural gas, and then enter the absorbent cotton filter layer 10 through the gap between the first shell 1 and the filter barrel 6. The absorbent cotton filter layer 10 can absorb moisture in the natural gas.

[0031] Example 2

[0032] See also Figure 2In order to facilitate the replacement of the polyester filter membrane layer 13, a limiting ring 18 is fixedly connected to the lower part of the inner wall of the inner cavity of the second shell 2, and the polyester filter membrane layer 13 is installed on the upper end surface of the limiting ring 18.

[0033] Working principle: When in use, the natural gas transmission pipe is connected to the air inlet pipe 5, and the natural gas enters the bottom of the inner cavity of the filter barrel 6 through the air inlet pipe 5. The natural gas enters the activated carbon filter layer 8 through the annular inner net 7. The activated carbon filter layer 8 can absorb impurities in the natural gas. The residual moisture in the natural gas enters the inner cavity of the collection barrel 11 through the through hole, and the stop valve 12 can block moisture and avoid natural gas leakage. The natural gas enters the absorbent cotton filter layer 10 through the gap between the first shell 1 and the filter barrel 6. The absorbent cotton filter layer 10 can absorb the residual moisture in the natural gas. The natural gas passes through the absorbent cotton filter layer 10 and enters the inner cavity of the second shell 2, and enters the polyester membrane filter layer 13, and the natural gas is filtered again. The polyester membrane filter layer 13 can absorb impurities in the natural gas and improve the quality of the natural gas.

[0034] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A filter element for a filter separator, comprising a first shell (1) and a second shell (2), characterized in that: The first shell (1) is threadedly connected to the second shell (2); a connecting ring (3) is fixedly connected to the middle of the upper end surface of the first shell (1); an air outlet (4) is opened in the middle of the lower end surface of the second shell (2); a filter barrel (6) is provided in the inner cavity of the first shell (1); an annular inner net (7) is fixedly connected to the bottom of the inner cavity of the filter barrel (6) in the transverse direction; an air inlet pipe (5) is provided through the middle of the annular inner net (7); the upper part of the air inlet pipe (5) extends through the inside of the connecting ring (3); a sealing device is provided inside the connecting ring (3); an annular outer net (9) is fixedly connected to the lower part of the inner wall of the first shell (1); the inner wall of the inner ring of the annular outer net (9) is in contact with the outer wall of the filter barrel (6); a polyester filter membrane layer (13) is installed in the middle of the inner cavity of the second shell (2).

2. The filter element of the filter separator according to claim 1, characterized in that: The outer ring of the lower end surface of the filter barrel (6) is fixedly connected to a collecting barrel (11), the collecting barrel (11) is funnel-shaped, and a stop valve (12) is provided in the middle of the lower end surface of the collecting barrel (11).

3. The filter element of the filter separator according to claim 1, characterized in that: The sealing device comprises an external thread (14), an internal thread (15), an arc-shaped groove (16) and a convex strip (17); the inner wall of the inner cavity of the connecting ring (3) is provided with an internal thread (15); the upper portion of the outer wall of the air intake pipe (5) is provided with an external thread (14); the external thread (14) is meshed with the internal thread (15); the upper portion of the air intake pipe (5) is threadedly connected to the connecting ring (3); the lower portion of the inner wall of the inner cavity of the connecting ring (3) is provided with an arc-shaped groove (16); the upper portion of the outer wall of the air intake pipe (5) is fixedly connected with a convex strip (17); the convex strip (17) is installed in the inner cavity of the arc-shaped groove (16).

4. The filter element of the filter separator according to claim 3, characterized in that: The arc-shaped groove (16) and the convex strip (17) are both annular, the arc-shaped groove (16) matches the convex strip (17), and the convex strip (17) is a rubber convex strip.

5. The filter element of the filter separator according to claim 1, characterized in that: An activated carbon filter layer (8) is installed on the upper end surface of the annular inner net (7), and an absorbent cotton filter layer (10) is installed on the upper end surface of the annular outer net (9).

6. The filter element of the filter separator according to claim 1, characterized in that: A limiting ring (18) is fixedly connected to the lower portion of the inner wall of the inner cavity of the second shell (2), and the polyester filter membrane layer (13) is mounted on the upper end surface of the limiting ring (18).

Images