A high pressure medium filter pressure charging leak line device

Abstract

The utility model discloses a kind of for high-pressure medium filter pressure charging leak pipeline device, it is related to chemical engineering field.The filter inlet and filter outlet are provided with medium filter A and medium filter B in parallel, first inlet valve is arranged on the pipeline of medium filter A and filter inlet, second inlet valve is arranged on the pipeline of medium filter B and filter inlet, pressure charging leak assembly is arranged between medium filter A, medium filter B and filter inlet, pressure charging leak assembly is provided with three ports, three the inside of port is communicated by three pressure charging leak pipelines, one control valve is arranged on each pressure charging leak pipeline.The utility model utilizes three small-bore pressure charging leak pipelines equipped with independent control valve, when carrying out pressure charging leak to single medium filter, can completely avoid the fine adjustment operation of original large-bore inlet valve, fundamentally eliminates the erosion wear caused by valve core due to throttling scour, greatly prolongs the service life of key valve.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, specifically to a pipeline device for pressurizing and leak testing of high-pressure media filters. Background Technology

[0002] High-pressure media pipelines are widely used in industrial plants such as petrochemical and coal chemical plants, and their operational stability has a significant impact on the safety and efficiency of the overall plant. For example, in the low-temperature methanol washing process, the methanol filter requires frequent cleaning and maintenance due to the high content of solid particulate matter in the raw gas. These filters typically operate under high pressure conditions (such as above 3.6 MPa (G), and their inlet and outlet valves (DN250 300LB class) need to be repeatedly opened and closed during isolation maintenance and restart.

[0003] In current operations, when performing system pressurization and sealing tests after filter maintenance, the inlet valve must be slightly opened to control the pressurization rate. However, with the valve opening extremely small, solid particles in the high-speed flowing methanol medium can severely erode the valve core surface, leading to erosion and wear. After prolonged and frequent operation, the valve sealing surface becomes damaged, preventing complete closure and causing internal leakage. This problem not only increases the dust content in the methanol medium, affecting purification efficiency, but can also lead to system airtightness failure, increasing the risk of flammable, explosive, and toxic gas leaks, posing a serious threat to the safe and stable operation of the unit.

[0004] Therefore, there is an urgent need for a device with a simple structure and safe and reliable operation to solve the problem of erosion damage caused by valve slight opening during the pressurization and leak testing of high-pressure filters. Utility Model Content

[0005] The purpose of this invention is to provide a pressure testing pipeline device for high-pressure media filters. A pressure testing component is installed between media filters A and B, which are connected in parallel. By switching the valves on the pressure testing component, pressure testing can be performed on any one of the filters, thus solving the problem of valve erosion damage caused by slight valve opening during the pressure testing process of high-pressure filters.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A pipeline device for pressurizing and leak testing of a high-pressure media filter includes a media filter A and a media filter B connected in parallel between the filter inlet and the filter outlet. A first inlet valve is installed on the pipeline connecting media filter A to the filter inlet, and a second inlet valve is installed on the pipeline connecting media filter B to the filter inlet. A pressurization and leak testing assembly is provided between media filter A, media filter B and the filter inlet. The pressurization and leak testing assembly is used to replace the pipeline when media filter A and / or media filter B are pressurized for leak testing. The pressurization and leak testing assembly has three ports, which are connected by three pressurization and leak testing pipelines. Each pressurization and leak testing pipeline is equipped with a control valve. By switching the valves, pressurization and leak testing can be performed on any filter.

[0007] This invention provides a pressure testing component between media filter A and media filter B. By replacing the pipeline between media filter A and / or media filter B and the filter inlet with the pressure testing component, the pressure testing is performed, thereby avoiding the problem of valve erosion damage caused by high-pressure gas flowing through the slightly open first inlet valve and / or second inlet valve during the pressure testing process.

[0008] The pressurization and leak testing pipeline of this utility model is a small-diameter pipeline, and the control valve is a DN25 300LB valve.

[0009] The pressure testing and leak detection assembly of this invention, through a unique structure with three ports and three independent pipelines, enables one device to flexibly serve two parallel filters, avoiding the redundant solution of adding two separate pipelines for each filter.

[0010] One leak testing device serves two filters, saving material, installation and maintenance costs compared to the traditional one-to-one modification; by switching valves, either filter can be pressurized and leak tested without affecting the standby or operating status of the other; pressurization and leak testing are always carried out through small-diameter pipelines, completely avoiding the risk of erosion damage caused by slight opening of the main process large-diameter valves.

[0011] Furthermore, the three ports are respectively a first port, a second port, and a third port. The first port is connected to the pipeline before the first inlet valve, the second port is connected to the pipeline after the first inlet valve, and the third port is connected to the pipeline after the second inlet valve.

[0012] One port is connected to the common inlet source to ensure a pressure supply, while the other two ports are connected after the two main inlet valves to ensure that pressure is accurately introduced into the filter to be tested. This setup ensures the correctness and effectiveness of the pressure transmission path, guaranteeing the reliable implementation of the pressure testing function.

[0013] Furthermore, a first control valve is provided on the pressurization and leak testing pipeline connected to the first port, a second control valve is provided on the pressurization and leak testing pipeline connected to the second port, and a third control valve is provided on the pressurization and leak testing pipeline connected to the third port.

[0014] Each passage is equipped with an independent shut-off valve, enabling independent and precise control of the three passages, providing extremely high operational flexibility and safety. Operators can precisely switch different valve combinations to isolate or connect to specific filters, preventing media cross-contamination or misoperation, and ensuring safe maintenance.

[0015] Furthermore, when pressurizing and leak testing the media filter A, the first inlet valve is closed, the first control valve and the second control valve are opened, and the third control valve is closed.

[0016] Furthermore, when pressurizing and leak testing the media filter B, close the second inlet valve, open the first control valve and the third control valve, and close the second control valve.

[0017] Furthermore, a return pipeline is provided between the filter inlet and the filter outlet for returning filter media that does not meet the requirements. The return pipeline is arranged in parallel with the pipelines containing media filter A and media filter B.

[0018] The device of this invention is applicable to actual working conditions, ensuring that other functions of the entire system are not affected when the filter is pressurized for leak testing, thus improving the practicality and versatility of the device.

[0019] Furthermore, a third inlet valve is provided on the return pipeline.

[0020] An independent shut-off valve (third inlet valve) is configured for the return line, providing independent control over the return line and enhancing the safety and flexibility of the entire system operation.

[0021] Furthermore, a first outlet valve is provided on the pipeline connecting the media filter A to the filter outlet, and a second outlet valve is provided on the pipeline connecting the media filter B to the filter outlet.

[0022] Compared with the prior art, the beneficial effects of this utility model are: This invention achieves significant benefits by adding a shared multi-channel pressurization and leak testing assembly to the main pipeline of its parallel filter group. This assembly connects to the system inlet and the inlet valves of the two filters via three ports. Utilizing three small-diameter pipelines equipped with independent control valves, the fine-tuning operation of the original large-diameter inlet valve is completely avoided when pressurizing and leak testing a single filter. This fundamentally eliminates erosion and wear of the valve core caused by throttling, greatly extending the service life of critical valves. Simultaneously, one device serves two devices, resulting in a compact structure that reduces modification costs and complexity. Furthermore, independent shut-off control of each pipeline effectively prevents media cross-contamination, ensuring operational safety and flexibility, and ultimately guaranteeing the long-term stable operation of the device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the modified pipeline structure of this utility model; Figure 2 This is a schematic diagram of the pipeline structure before the modification of this utility model; Figure 3 This is a schematic diagram of the structure of the pressurization and leak testing assembly of this utility model; Reference numerals: 1-Filter inlet; 2-Filter outlet; 3-Media filter A; 4-Media filter B; 5-Second inlet valve; 6-First inlet valve; 7-First port; 8-Second port; 9-Third port; 10-First control valve; 11-Second control valve; 12-Third control valve; 13-Pressure test pipeline; 14-Third inlet valve; 15-Return pipeline; 16-First outlet valve; 17-Second outlet valve. Detailed Implementation Example 1

[0024] like Figure 1 As shown, a pressure testing pipeline 13 for a high-pressure media filter is provided. Media filters A3 and B4 are arranged side-by-side between the filter inlet 1 and the filter outlet 2. A first inlet valve 6 is installed on the pipeline connecting media filter A3 to filter inlet 1, and a second inlet valve 5 is installed on the pipeline connecting media filter B4 to filter inlet 1. A pressurization and leak testing assembly is provided between the media filter A3, the media filter B4 and the filter inlet 1. The pressurization and leak testing assembly is used to replace the pipeline when the media filter A3 and / or the media filter B4 is pressurized for leak testing. The pressurization and leak testing assembly is provided with three ports, and the three ports are connected by three pressurization and leak testing pipelines 13. Each pressurization and leak testing pipeline 13 is provided with a control valve. By switching the valve, pressurization and leak testing can be performed on any filter.

[0025] like Figure 2 As shown, in the current operation, after the media filter B4 is overhauled, when performing system pressurization and sealing tests, the second inlet valve 5 must be slightly opened to control the pressurization rate. With the second inlet valve 5 at a very small opening, the solid particles contained in the high-speed flowing methanol medium will cause severe erosion and wear on the valve core surface.

[0026] This invention modifies the existing system by adding a first inlet valve 6 to the pipeline between media filter A3 and filter inlet 1. A pressure testing and leak detection assembly is arranged in parallel between media filter A3 and media filter B4. This assembly has three ports, which are connected internally by three pressure testing and leak detection pipelines 13. Each pipeline 13 is equipped with a control valve, allowing pressure testing and leak detection of any filter by switching valves. This replaces the original pipeline during system pressure and sealing tests, thus preventing high-pressure gas from entering media filter A3 and / or media filter B4 through the first inlet valve 6 and / or the second inlet valve 5, thus avoiding erosion and wear on the first inlet valve 6 and / or the second inlet valve 5 during these tests.

[0027] The pressure testing and leak testing assembly of this invention can completely avoid the fine-tuning operation of the original large-diameter inlet valve, fundamentally eliminating the erosion and wear of the valve core caused by throttling and scouring, and greatly extending the service life of critical valves. Example 2

[0028] like Figure 1 and Figure 3 As shown, based on Embodiment 1, the three ports are respectively the first port 7, the second port 8 and the third port 9. The first port 7 is connected to the pipeline before the first inlet valve 6, the second port 8 is connected to the pipeline after the first inlet valve 6, and the third port 9 is connected to the pipeline after the second inlet valve 5.

[0029] A first control valve 10 is provided on the pressure test pipeline 13 connected to the first port 7, a second control valve 11 is provided on the pressure test pipeline 13 connected to the second port 8, and a third control valve 12 is provided on the pressure test pipeline 13 connected to the third port 9.

[0030] When pressurizing and leak testing the media filter A3, close the first inlet valve 6, open the first control valve 10 and the second control valve 11, and close the third control valve 12.

[0031] When pressurizing and leak testing the media filter B4, close the second inlet valve 5, open the first control valve 10 and the third control valve 12, and close the second control valve 11.

[0032] When performing system pressurization and sealing tests on media filter A3, close the first inlet valve 6, the second inlet valve 5, and the filter outlet 2, open the first control valve 10 and the second control valve 11, and close the third control valve 12. High-pressure gas cannot pass through the first inlet valve 6 and can only pass through the pressurization and leak test assembly. It first passes through the first control valve 10 and then through the second control valve 11 to reach media filter A3, thus realizing the system pressurization and sealing test of media filter A3.

[0033] When performing system pressurization and sealing tests on media filter B4, close the first inlet valve 6, the second inlet valve 5, and the filter outlet 2, open the first control valve 10 and the third control valve 12, and close the second control valve 11. High-pressure gas cannot pass through the second inlet valve 5 and can only pass through the pressurization and leak test assembly. It first passes through the first control valve 10 and then through the third control valve 12 to reach media filter B4, thus achieving system pressurization and sealing tests on media filter B4.

[0034] The system can also perform system pressurization and sealing tests on media filters A3 and B4 simultaneously. The first inlet valve 6, the second inlet valve 5, and the filter outlet 2 are closed. The first control valve 10, the second control valve 11, and the third control valve 12 are opened. High-pressure gas cannot pass through the first inlet valve 6 and the second inlet valve 5; it can only pass through the pressurization and leak testing assembly. It first passes through the first control valve 10, then the second control valve 11, and finally reaches media filter A3. After passing through the third control valve 12, it reaches media filter B4, thus simultaneously achieving system pressurization and sealing tests on media filters A3 and B4. Example 3

[0035] like Figure 1 As shown in Embodiment 1, a return pipeline 15 is further provided between the filter inlet 1 and the filter outlet 2 for returning filter media that does not meet the requirements. The return pipeline 15 is arranged in parallel with the pipelines containing media filters A3 and B4. A third inlet valve 14 is provided on the return pipeline 15.

[0036] For filter media that do not meet the requirements, they can be returned through the return line 15. A third inlet valve 14 is installed on the return line 15. When the pressure test and leak test assembly is working, the third inlet valve 14 is in the closed state. Example 4

[0037] like Figure 1 As shown, based on Embodiment 1, a first outlet valve 16 is installed on the pipeline connecting the media filter A3 and the filter outlet 2, and a second outlet valve is installed on the pipeline connecting the media filter B4 and the filter outlet 2. 17 During normal production operations, the first outlet valve 16 and the second outlet valve are in the open state. When using the pressure testing and leak detection assembly to perform system pressure testing and sealing tests, the first outlet valve 16 and the second outlet valve are in the closed state.

Claims

1. A pipeline device for pressurizing and leak testing of a high-pressure medium filter, characterized in that, Media filter A (3) and media filter B (4) are arranged side by side between filter inlet (1) and filter outlet (2). A first inlet valve (6) is provided on the pipeline between media filter A (3) and filter inlet (1), and a second inlet valve (5) is provided on the pipeline between media filter B (4) and filter inlet (1). A pressurization and leak testing assembly is provided between the media filter A (3), the media filter B (4) and the filter inlet (1). The pressurization and leak testing assembly is used to replace the pipeline when the media filter A (3) and / or the media filter B (4) are pressurized for leak testing. The pressurization and leak testing assembly is provided with three ports, and the three ports are connected by three pressurization and leak testing pipelines (13). Each pressurization and leak testing pipeline (13) is provided with a control valve. By switching the valve, pressurization and leak testing can be performed on any filter.

2. The pressurization and leak testing pipeline device according to claim 1, characterized in that, The three ports are the first port (7), the second port (8), and the third port (9), respectively. The first port (7) is connected to the pipeline before the first inlet valve (6), the second port (8) is connected to the pipeline after the first inlet valve (6), and the third port (9) is connected to the pipeline after the second inlet valve (5).

3. The pressurization and leak testing pipeline device according to claim 2, characterized in that, A first control valve (10) is provided on the pressure test pipeline (13) connected to the first port (7), a second control valve (11) is provided on the pressure test pipeline (13) connected to the second port (8), and a third control valve (12) is provided on the pressure test pipeline (13) connected to the third port (9).

4. The pressurization and leak testing pipeline device according to claim 3, characterized in that, When pressurizing and leak testing the media filter A (3), close the first inlet valve (6), open the first control valve (10) and the second control valve (11), and close the third control valve (12).

5. The pressurization and leak testing pipeline device according to claim 3, characterized in that, When pressurizing and leak testing the media filter B (4), close the second inlet valve (5), open the first control valve (10) and the third control valve (12), and close the second control valve (11).

6. The pressurization and leak testing pipeline device according to claim 1, characterized in that, A return pipe (15) is also provided between the filter inlet (1) and the filter outlet (2) for returning filter media that do not meet the requirements. The return pipe (15) is arranged in parallel with the pipes containing media filter A (3) and media filter B (4).

7. The pressurization and leak testing pipeline device according to claim 6, characterized in that, A third inlet valve (14) is provided on the return pipeline (15).

8. The pressurization and leak testing pipeline device according to claim 1, characterized in that, A first outlet valve (16) is provided on the pipeline between the media filter A (3) and the filter outlet (2), and a second outlet valve (17) is provided on the pipeline between the media filter B (4) and the filter outlet (2).

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