Anti-blocking pipeline structure for low-temperature methanol washing process

Abstract

The utility model discloses an anti-clogging pipeline structure for a low-temperature methanol washing process, which comprises a low-temperature methanol washing tower, a flash tower and a recycle gas compressor, an outlet of the low-temperature methanol washing tower is connected with an inlet of the flash tower through a pipeline, and a flash steam outlet of the flash tower is connected to the inlet of the low-temperature methanol washing tower through the recycle gas compressor. A filtering and deslagging mechanism is arranged on a pipeline connected between the low-temperature methanol washing tower and the flash tower; the filtering and deslagging mechanism is a first three-way pipe connected with a discharge pipe of the low-temperature methanol washing tower; according to the utility model, the filtering and deslagging mechanism is arranged on the pipeline connected between the low-temperature methanol washing tower and the flash tower, so that impurities in gas treated by the low-temperature methanol washing tower can be filtered, and the impurities in the washed gas are prevented from being adhered to the inner wall of the pipeline; or the normal work is influenced by accumulation and blockage caused by entering the subsequent process, and the normal operation of the low-temperature methanol washing process is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to low temperature methanol washing technical field, concretely is a kind of low temperature methanol washing process's anti-blocking pipeline structure. BACKGROUND

[0002] Low temperature methanol washing is a kind of process using the great solubility of acid gas of methanol at low temperature, removes acid gas in raw gas.The process uses cold methanol as absorption solvent, realizes the removal of acid gas and the recycling of methanol by the cooperation of absorption tower and multiple analysis towers.

[0003] According to the authorized patent of Chinese application No.CN201911245114.1, a kind of low temperature methanol washing modification process is disclosed, the problem in the background art is solved.The following technical solutions are adopted: straight supplement high-pressure nitrogen pipeline is connected to the high-pressure nitrogen inlet of flash tank by branch, while the system pressure of low temperature methanol washing unit is reduced by a certain amount;Liquid ammonia pump in ammonia compressor unit is connected to the standby flange of inlet separator by pipeline.The application replenishes nitrogen by high-pressure nitrogen pipeline, so that the total nitrogen quantity meets the demand of low temperature methanol washing tower and circulating gas compressor running, meets the minimum operating condition of circulating gas compressor, avoids that the gas flashed from venting pipe is directly connected to flare system and discharged, greatly reduces carbon emission, realizes the recycling of nitrogen;Realize that, under high load condition, the liquid level of inlet separator in ammonia compressor unit is safely, stably and quickly handled, ensure the stable operation of low temperature methanol washing unit, prevent ammonia compressor from jumping car.But after low temperature methanol washing process, impurities in gas are easy to cause blockage of pipeline or blockage of subsequent treatment process pipeline, affect the normal operation of low temperature methanol washing process. UTILITARIAN CONTENT

[0004] To solve the defects existing in the prior art, the utility model provides a kind of low temperature methanol washing process's anti-blocking pipeline structure.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] This utility model discloses an anti-clogging pipeline structure for a low-temperature methanol washing process, comprising a low-temperature methanol washing tower, a flash evaporator, and a circulating gas compressor. The outlet of the low-temperature methanol washing tower and the inlet of the flash evaporator are connected by a pipeline. The flash vapor outlet of the flash evaporator is connected to the inlet of the low-temperature methanol washing tower through the circulating gas compressor. A filtration and slag removal mechanism is provided on the pipeline connecting the low-temperature methanol washing tower and the flash evaporator. The filtration and slag removal mechanism is connected to a first tee pipe to the discharge pipe of the low-temperature methanol washing tower. A connecting pipe is connected to the feed pipe of the flash evaporator. A second tee pipe is provided at the end of the connecting pipe. Both branches of the second tee pipe are connected to flexible hoses. A bottom cover is connected to the end of the flexible hose away from the second tee pipe. A filter cartridge is threadedly connected to the bottom cover. A filter assembly is provided inside the filter cartridge. A top cover is connected to a branch of the first tee pipe via a sealed bearing. The top cover is threadedly connected to the top of the filter cartridge. A first control valve is installed on each of the two branches of the first tee pipe, and a second control valve is installed on each of the two branches of the bottom cover.

[0007] As a preferred embodiment of this utility model, sealing gaskets are provided at the connection points between the top cover and the filter cartridge and between the bottom cover and the filter cartridge.

[0008] As a preferred embodiment of the present invention, the filtration assembly includes a filter screen cylinder placed inside the filter cartridge.

[0009] As a preferred technical solution of this utility model, the top opening of the filter cylinder is provided with a plurality of positioning support blocks that are arranged in a ring and are equidistantly distributed, and the outer wall of the filter cylinder is provided with a load-bearing ring plate that matches the positioning support blocks.

[0010] As a preferred embodiment of this utility model, the opening of the filter cartridge is connected to a semi-circular handle via a rotating shaft.

[0011] As a preferred embodiment of the present invention, the inner wall of the filter cylinder is provided with a plurality of L-shaped limiting support rings that are arranged in annular shape and are equidistant from each other to limit and support the bottom end of the filter cylinder.

[0012] The beneficial effects of this utility model are:

[0013] 1. The anti-clogging pipeline structure of this low-temperature methanol washing process has a filtration and slag removal mechanism installed on the pipeline connecting the low-temperature methanol washing tower and the flash evaporation tower. This mechanism can filter impurities in the gas treated by the low-temperature methanol washing tower, preventing impurities in the washed gas from adhering to the inner wall of the pipeline or entering subsequent processes and causing accumulation and blockage, thus ensuring the normal operation of the low-temperature methanol washing process.

[0014] 2. The anti-clogging pipeline structure of this low-temperature methanol washing process allows for the removal of filtered impurities from the filter cylinder during cleaning. The first and second control valves on the same side of the pipe wall rotate the top cover on the other side, separating it from the filter cylinder. The bottom cover is then removed via a threaded connection, allowing the filter cylinder to be taken out and the filtered impurities cleaned. The filter cylinder is then placed back inside the filter cylinder and connected to the bottom and top covers via a threaded connection. Another filter cylinder can then be removed to clean the impurities. This allows for simultaneous cleaning of filtered impurities during operation, improving work efficiency. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of an anti-clogging pipeline structure for a low-temperature methanol washing process according to this utility model.

[0017] Figure 2 This is a schematic diagram of the filter and slag removal mechanism of an anti-clogging pipeline structure for a low-temperature methanol washing process according to this utility model.

[0018] Figure 3 This is a cross-sectional view of the filter cartridge and filter screen of an anti-clogging pipeline structure for a low-temperature methanol washing process according to this utility model.

[0019] Figure 4 This utility model relates to an anti-clogging pipeline structure for a low-temperature methanol washing process. Figure 3 Enlarged section view of the middle part.

[0020] In the diagram: 1. Low-temperature methanol washing tower; 2. Flash evaporator; 3. Circulating gas compressor; 4. Filtration and slag removal mechanism; 5. First tee pipe; 6. Connecting pipe; 7. Second tee pipe; 8. Hose; 9. Bottom cover; 10. Filter cartridge; 11. Filter assembly; 12. Top cover; 13. Sealing gasket; 14. Filter screen cylinder; 15. Positioning support block; 16. Load-bearing ring plate; 17. Handle; 18. Limiting support ring; 19. First control valve; 20. Second control valve. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this utility model discloses an anti-clogging pipeline structure for a low-temperature methanol washing process, comprising a low-temperature methanol washing tower 1, a flash evaporator 2, and a circulating gas compressor 3. The outlet of the low-temperature methanol washing tower 1 and the inlet of the flash evaporator 2 are connected by a pipeline. The flash vapor outlet of the flash evaporator 2 is connected to the inlet of the low-temperature methanol washing tower 1 through the circulating gas compressor 3. A filtration and slag removal mechanism 4 is provided on the pipeline connecting the low-temperature methanol washing tower 1 and the flash evaporator 2. The filtration and slag removal mechanism 4 is connected to a first tee pipe 5 via the discharge pipe of the low-temperature methanol washing tower 1. A connecting pipe 6 is connected to the feed pipe of the flash evaporator 2. A second tee pipe 7 is provided at the end of the connecting pipe 6. Both branches of the second tee pipe 7 are connected to flexible hoses 8. The end of the flexible hose 8 away from the second tee pipe 7 is connected to a bottom... The cover 9 and the bottom cover 9 are threadedly connected to a filter cylinder 10. The filter cylinder 10 is equipped with a filter assembly 11 inside. The branch pipe of the first three-way pipe 5 is connected to the top cover 12 via a sealed bearing. The top cover 12 is threadedly connected to the top of the filter cylinder 10. The two branch pipes of the first three-way pipe 5 are each equipped with a first control valve 19, and the two branch pipes of the bottom cover 9 are each equipped with a second control valve 20. By providing a filtration and slag removal mechanism 4 on the pipeline connecting the low-temperature methanol washing tower 1 and the flash evaporation tower 2, impurities in the gas treated by the low-temperature methanol washing tower 1 can be filtered. This avoids impurities in the washed gas from adhering to the inner wall of the pipeline or entering the subsequent process and causing accumulation and blockage, thus ensuring the normal operation of the low-temperature methanol washing process.

[0023] Among them, sealing gaskets 13 are provided at the connection between the top cover 12 and the filter cylinder 10 and between the bottom cover 9 and the filter cylinder 10, and the sealing gaskets 13 can play a good sealing role.

[0024] The filter assembly 11 includes a filter screen cylinder 14 placed inside the filter cartridge 10. When cleaning the impurities filtered inside the filter screen cylinder 14, the first control valve 19 and the second control valve on the same side of the pipe wall rotate the top cover 12 on the other side, so that the top cover 12 is separated from the filter cartridge 10. Then, the bottom cover 9 is removed by threaded connection, and the filter screen cylinder 14 can be taken out to clean the filtered impurities. The filter screen cylinder 14 is then placed inside the filter cartridge 10, and the filter cartridge 10 is connected between the bottom cover 9 and the top cover 12 by threaded connection. Then, another filter cartridge 10 is removed to clean the impurities. The filtered impurities can be cleaned while the filter is working, which improves the work efficiency.

[0025] The filter cylinder 10 has multiple ring-shaped and equidistantly distributed positioning support blocks 15 at its top opening. The outer wall of the filter screen cylinder 14 has a load-bearing ring plate 16 that matches the positioning support blocks 15, which can quickly position the filter screen cylinder 14. The top cover 12 can press the top of the filter screen cylinder 14 to prevent shaking.

[0026] The filter cylinder 10 has a semi-circular handle 17 connected to its opening via a pivot, which makes it easy to rotate the handle 17 and thus easy to remove the filter screen cylinder 14 from inside the filter cylinder 10.

[0027] The inner wall of the filter cylinder 10 is provided with a plurality of L-shaped limiting support rings 18 that are arranged in a ring shape and are equidistant from each other to limit and support the bottom end of the filter screen cylinder 14.

[0028] During operation, the anti-clogging pipeline structure of this low-temperature methanol washing process has a filtration and slag removal mechanism 4 installed on the pipeline connecting the low-temperature methanol washing tower 1 and the flash evaporation tower 2. This mechanism can filter impurities in the gas treated by the low-temperature methanol washing tower 1, preventing impurities in the washed gas from adhering to the inner wall of the pipeline or entering subsequent processes and causing accumulation and blockage, thus ensuring the normal operation of the low-temperature methanol washing process.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A clog-resistant pipeline structure for a low-temperature methanol washing process, comprising a low-temperature methanol washing tower (1), a flash tower (2), and a circulating gas compressor (3), wherein the outlet of the low-temperature methanol washing tower (1) and the inlet of the flash tower (2) are connected by a pipeline, and the flash vapor outlet of the flash tower (2) is connected to the inlet of the low-temperature methanol washing tower (1) through the circulating gas compressor (3), characterized in that, The pipeline connecting the low-temperature methanol washing tower (1) and the flash evaporator (2) is equipped with a filtration and slag removal mechanism (4); The filtration and slag removal mechanism (4) is connected to the discharge pipe of the low-temperature methanol washing tower (1) via a first three-way pipe (5). The feed pipe of the flash tower (2) is connected to a connecting pipe (6). The end of the connecting pipe (6) is provided with a second three-way pipe (7). Both branches of the second three-way pipe (7) are connected to flexible hoses (8). The end of the flexible hose (8) away from the second three-way pipe (7) is connected to a bottom cover (9). The bottom cover (9) is threadedly connected to a filter cylinder (10). The filter cylinder (10) is provided with a filter assembly (11) inside. The branch of the first three-way pipe (5) is connected to a top cover (12) via a sealed bearing. The top cover (12) is threadedly connected to the top of the filter cylinder (10). The first control valve (19) is installed on both branches of the first three-way pipe (5), and the second control valve (20) is installed on both branches of the two bottom covers (9).

2. The anti-clogging pipeline structure for a low-temperature methanol washing process according to claim 1, characterized in that, Sealing gaskets (13) are provided at the connection between the top cover (12) and the filter cylinder (10) and between the bottom cover (9) and the filter cylinder (10).

3. The anti-clogging pipeline structure for a low-temperature methanol washing process according to claim 1, characterized in that, The filter assembly (11) includes a filter screen (14) placed inside the filter cartridge (10).

4. The anti-clogging pipeline structure for a low-temperature methanol washing process according to claim 3, characterized in that, The top opening of the filter cylinder (10) is provided with a plurality of ring-shaped and equally spaced positioning support blocks (15), and the outer wall of the filter screen cylinder (14) is provided with a load-bearing ring plate (16) that matches the positioning support blocks (15).

5. The anti-clogging pipeline structure for a low-temperature methanol washing process according to claim 4, characterized in that, The filter cartridge (10) has a semi-circular handle (17) connected to its opening via a pivot.

6. The anti-clogging pipeline structure for a low-temperature methanol washing process according to claim 5, characterized in that, The inner wall of the filter cylinder (10) is provided with a plurality of L-shaped limiting support rings (18) that are arranged in a ring and are equidistant from each other to limit and support the bottom end of the filter screen cylinder (14).

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