Automatic dehydration system for dehydration bag of return tank of negative pressure tower

Abstract

The utility model relates to the technical field of chemical production, and discloses an automatic dehydration system of a negative pressure tower return tank dehydration bag, which comprises the negative pressure tower return tank dehydration bag and a water diversion channel, a water outlet of the negative pressure tower return tank dehydration bag is connected with a water inlet of the water diversion channel through a dehydration pipeline, and a dehydration valve is arranged on the dehydration pipeline. A water outlet of the water diversion tank is connected into a sewage discharge system through a sewage discharge pipeline, a sewage discharge valve is arranged on the sewage discharge pipeline, a first emptying valve is arranged at the top of the water diversion tank and connected with one end of a first gas phase valve through a first pipeline, and the other end of the first gas phase valve is connected with an inlet pipeline of the tail gas recovery pump through a second pipeline. According to the utility model, the gas phase channel of the water diversion channel is changed, the pressure balance between the negative pressure tower return tank dehydration bag and the water diversion channel as well as between the water diversion channel and the blowdown system is realized, the water phase in the negative pressure tower return tank dehydration bag can be rapidly removed to the water diversion channel, and the water phase in the water diversion channel can be rapidly discharged to the blowdown system.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, specifically to an automatic dehydration system for a negative pressure tower reflux tank dehydration bag. Background Technology

[0002] Current production equipment such as negative pressure tower reflux tank dehydration bag dehydration system, etc. Figure 1 As shown, during dehydration of the dehydration package 14 in the negative pressure tower reflux tank, the dehydration valve 15 needs to be manually opened. The aqueous phase flows by gravity into the water distribution tank 13 of the negative pressure tower reflux tank. During the dehydration process, the pressure inside the dehydration package 14 in the negative pressure tower reflux tank is -60 kPa, and the pressure inside the water distribution tank 13 is -10 kPa. The aqueous phase flows from the low-pressure area to the high-pressure area by its own gravity, resulting in a long dehydration time. After the water distribution tank 13 is full, the dehydration valve 15 is manually closed, and the first gas phase valve 10 on the gas phase pipeline 9 of the water distribution tank 13, as well as the front and rear shut-off valves of the first gas phase valve 10, are opened. The drain valve 12 on the drain pipeline 11 is also opened to drain the water. During the drainage process, the pressure in the tail gas recovery buffer tank 7 connected to the gas phase pipeline 9 of the water distribution tank 13 and the drain system cannot be balanced, resulting in a long drainage time for the water distribution tank 13, and in severe cases, drainage may not be possible. The inability of the water phase in the water distribution tank 13 to drain causes the dehydration bag 14 in the negative pressure tower reflux tank to be unable to dehydrate the water in the water distribution tank 13, resulting in an increase in the water content in the negative pressure tower reflux tank. In severe cases, the water content in the finished product exceeds the standard, leading to product defects. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an automatic dehydration system for a negative pressure tower reflux tank dehydration bag.

[0004] To achieve the above objectives, the technical solution of this utility model is: an automatic dehydration system for a negative pressure tower reflux tank dehydration package, comprising a negative pressure tower reflux tank dehydration package and a water distribution tank. The outlet of the negative pressure tower reflux tank dehydration package is connected to the inlet of the water distribution tank via a dehydration pipeline. A dehydration valve is provided on the dehydration pipeline. The outlet of the water distribution tank is connected to a sewage system via a sewage discharge pipeline. A sewage discharge valve is provided on the sewage discharge pipeline. A first vent valve is provided at the top of the water distribution tank. One end of the first vent valve is connected to a first gas phase valve via a first pipeline. The other end of the first gas phase valve is connected to the inlet pipeline of the tail gas recovery pump via a second pipeline.

[0005] Furthermore, the first pipeline is equipped with a pre-shut-off valve near the first gas phase valve.

[0006] Furthermore, a shut-off valve is provided on the second pipeline, and a post-shut-off valve is provided on the second pipeline near the first gas phase valve.

[0007] Furthermore, a second vent valve is provided at the top of the dehydration package of the negative pressure tower reflux tank. The first vent valve is connected to one end of a second gas phase valve through a third pipeline, and the other end of the second gas phase valve is connected to the second vent valve through a fourth pipeline.

[0008] Furthermore, it also includes a controller, which is electrically connected to the water level gauge of the water distribution tank, the dehydration valve, the first gas phase valve, the second gas phase valve and the drain valve respectively.

[0009] Furthermore, a valve is installed on the third pipeline.

[0010] The beneficial effects of this utility model are:

[0011] (1) This utility model changes the gas phase channel of the water distribution tank, realizes the pressure balance between the dehydration bag of the negative pressure tower reflux tank and the water distribution tank, and between the water distribution tank and the sewage system. The water phase in the dehydration bag of the negative pressure tower reflux tank can be quickly dehydrated to the water distribution tank, and the water phase in the water distribution tank can be quickly discharged to the sewage system.

[0012] (2) An automatic control program has been added to achieve automatic dehydration, which avoids product loss caused by the oil phase in the negative pressure tower return tank being discharged into the water distribution tank and sewage system due to human factors.

[0013] (3) It reduced the moisture content of the product in the negative pressure tower reflux tank, ensuring product quality and avoiding the generation of unqualified products.

[0014] (4) The frequency of water draining in the water tank can be used to monitor whether the heat exchange equipment is leaking. If the frequency of dehydration exceeds the set value, it can be determined that the heat exchange equipment is leaking. Attached Figure Description

[0015] Figure 1 This is a diagram of the dehydration system of the negative pressure tower reflux tank dehydration bag in existing technology production equipment;

[0016] Figure 2 This is a diagram of the automatic dehydration system of the negative pressure tower reflux tank dehydration bag in the production device of this utility model;

[0017] Figure 3 This is the control flowchart of this utility model.

[0018] In the diagram: 1. First vent valve; 2. Front shut-off valve; 3. Rear shut-off valve; 4. Shut-off valve; 5. First pipeline; 6. Second pipeline; 7. Tail gas recovery buffer tank; 8. Tail gas recovery pump; 9. Gas phase pipeline; 10. First gas phase valve; 11. Sewage discharge pipeline; 12. Sewage discharge valve; 13. Water distribution tank; 14. Negative pressure tower reflux tank dehydration bag; 15. Dehydration valve; 16. Controller; 17. Water distribution tank level gauge; 19. Third pipeline; 20. Second gas phase valve; 21. Fourth pipeline; 22. Second vent valve. Detailed Implementation

[0019] Example:

[0020] like Figure 2 and Figure 3 As shown, an automatic dehydration system for a negative pressure tower reflux tank dehydration package includes a negative pressure tower reflux tank dehydration package 14, a water distribution tank 13, and a controller 16. The outlet of the negative pressure tower reflux tank dehydration package 14 is connected to the inlet of the water distribution tank 13 via a dehydration pipeline. A dehydration valve 15 is installed on the dehydration pipeline. The outlet of the water distribution tank 13 is connected to a sewage system via a sewage discharge pipeline 11. A sewage discharge valve 12 is installed on the sewage discharge pipeline 11. A first vent valve 1 is installed at the top of the water distribution tank 13. The first vent valve 1 is connected to one end of the first gas phase valve 10 through the first pipeline 5. The other end of the first gas phase valve 10 is connected to the inlet pipeline of the tail gas recovery pump 8 through the second pipeline 6. The top of the dehydration package 14 of the negative pressure tower reflux tank is provided with a second vent valve 22. The first vent valve 1 is connected to one end of the second gas phase valve 20 through the third pipeline 19. The other end of the second gas phase valve 20 is connected to the second vent valve 22 through the fourth pipeline 21. A valve 18 is provided on the third pipeline 19.

[0021] The first pipeline 5 is equipped with a front shut-off valve 2 near the first gas phase valve 10.

[0022] The second pipeline 6 is equipped with a shut-off valve 4, and the second pipeline 6 is equipped with a rear shut-off valve 3 near the first gas phase valve 10.

[0023] The controller 16 is electrically connected to the water level gauge 17, the dehydration valve 15, the first gas phase valve 10, the second gas phase valve 20, and the drain valve 12. The controller 16 receives the water level signal from the water level gauge 17 and controls the opening and closing of the dehydration valve 15, the first gas phase valve 10, the second gas phase valve 20, and the drain valve 12 according to the water level of the water level gauge 17.

[0024] This utility model adds a first vent valve 1 to the top of the self-dividing water tank 13, and adds a first pipeline 5 after the first vent valve 1 to lead to the first gas phase valve 10. A second pipeline 6 is added from the first gas phase valve 10 to lead to the tail gas recovery pump 8, avoiding the tail gas recovery buffer tank 7. A front shut-off valve 2 and a rear shut-off valve 3 are provided before and after the first gas phase valve 10. A second vent valve 22 is added to the top of the dehydration bag 14 of the negative pressure tower return tank, and a pipeline is added after the first vent valve 1 to connect to the second vent valve 22. A second gas phase valve 20 and a valve 18 are added to the pipeline. When the dehydration tank 14 of the negative pressure tower reflux tank is dehydrated, the second gas phase valve 20, valve 18 and the second vent valve 22 are opened to equalize the pressure between the dehydration tank 14 of the negative pressure tower reflux tank and the water distribution tank 13; when the water distribution tank 13 is drained, the first gas phase valve 10, the first vent valve 1, the front shut-off valve 2, the rear shut-off valve 3 and the shut-off valve 4 are opened to equalize the pressure between the water distribution tank 13 and the sewage system, and the water phase in the water distribution tank 13 is quickly discharged to the sewage system.

[0025] This utility model adds an automatic control program. After the liquid level in the water tank 13 drops to 20%, the controller 16 controls the dehydration valve 15 and the second gas phase valve 20 to open. After the liquid level in the water tank 13 rises to 65%, the controller 16 controls the dehydration valve 15 and the second gas phase valve 20 to close, and opens the first gas phase valve 10 and the drain valve 12 to achieve automatic dehydration.

[0026] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

[0027] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

Claims

1. An automatic dehydration system for a negative pressure tower reflux tank dehydration package, comprising a negative pressure tower reflux tank dehydration package (14) and a water distribution tank (13), wherein the outlet of the negative pressure tower reflux tank dehydration package (14) is connected to the inlet of the water distribution tank (13) via a dehydration pipeline, a dehydration valve (15) is provided on the dehydration pipeline, and the outlet of the water distribution tank (13) is connected to a sewage system via a sewage discharge pipeline (11), a sewage discharge valve (12) is provided on the sewage discharge pipeline (11), characterized in that: The top of the water distribution tank (13) is provided with a first vent valve (1), which is connected to one end of the first gas phase valve (10) through a first pipeline (5), and the other end of the first gas phase valve (10) is connected to the inlet pipeline of the tail gas recovery pump (8) through a second pipeline (6).

2. The automatic dehydration system for the negative pressure tower reflux tank dehydration bag according to claim 1, characterized in that: The first pipeline (5) is provided with a front shut-off valve (2) near the first gas phase valve (10).

3. The automatic dehydration system for the negative pressure tower reflux tank dehydration package according to claim 1, characterized in that: The second pipeline (6) is provided with a shut-off valve (4), and the second pipeline (6) is provided with a rear shut-off valve (3) near the first gas phase valve (10).

4. The automatic dehydration system for the negative pressure tower reflux tank dehydration bag according to claim 1, characterized in that: The top of the dehydration package (14) of the negative pressure tower reflux tank is provided with a second vent valve (22). The first vent valve (1) is connected to one end of the second gas phase valve (20) through a third pipeline (19), and the other end of the second gas phase valve (20) is connected to the second vent valve (22) through a fourth pipeline (21).

5. The automatic dehydration system for the negative pressure tower reflux tank dehydration bag according to claim 4, characterized in that: It also includes a controller (16), which is electrically connected to the water level gauge (17), the dehydration valve (15), the first gas phase valve (10), the second gas phase valve (20) and the drain valve (12).

6. The automatic dehydration system for the negative pressure tower reflux tank dehydration bag according to claim 4, characterized in that: A valve (18) is provided on the third pipeline (19).

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