Water cutting device for epoxypropane extraction system of styrene co-production epoxypropane device

Abstract

The utility model provides a styrene co-production epoxypropane device epoxypropane extraction system water cutting device, which comprises a reflux tank I, a reflux tank II and a solvent tank, a water leg liquid collection bag I is arranged at the bottom of the reflux tank I, the bottom of the water leg liquid collection bag I is connected with a lower pipeline I, and the lower pipeline I is connected with a drainage pipeline I. A second water leg liquid collecting bag is arranged at the bottom of the second return tank, the bottom of the second water leg liquid collecting bag is connected with a second lower pipeline, and the second lower pipeline is connected with a second drainage pipeline. A third water leg liquid collection bag is arranged at the bottom of the solvent tank, the bottom of the third water leg liquid collection bag is connected with a third lower pipeline, and the third lower pipeline is connected with a third water drainage pipeline. According to the water cutting treatment system disclosed by the utility model, the content of water carried by materials in the water cutting treatment system is within 100-200ppm, so that product indexes are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of water cutting devices, in particular to a water cutting device of a propylene oxide extraction system of a styrene co-production propylene oxide device. Background Art

[0002] At present, the solvent in the water-cutting device of the propylene oxide extraction system of the styrene co-production propylene oxide unit carries a large amount of visible water. The existing technology can only return the material to the tank area through the return process. This operation will cause excessive water in the material and the water-cutting method is imperfect, resulting in a lower product qualification rate and affecting product output. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a water cutting device for the propylene oxide extraction system of a styrene co-production propylene oxide device. The present utility model is implemented through the following technical solutions:

[0004] A water cutting device for a propylene oxide extraction system of a styrene co-production propylene oxide device comprises a reflux tank 1, a reflux tank 2, and a solvent tank. A water leg liquid collecting bag 1 is provided at the bottom of the reflux tank 1, a level gauge 1 is provided on one side of the water leg liquid collecting bag 1, the bottom of the water leg liquid collecting bag 1 is connected to a lower pipeline 1, a drain valve 1 is provided on the lower pipeline 1, and the lower pipeline 1 is connected to a drain pipeline 1.

[0005] A water leg liquid collecting bag 2 is provided at the bottom of the second reflux tank, a level gauge 2 is provided on one side of the second water leg liquid collecting bag, the bottom of the second water leg liquid collecting bag is connected to a second lower pipeline, a drain valve 2 is provided on the second lower pipeline, and the second lower pipeline is connected to a second drain pipeline.

[0006] A water leg liquid collecting bag three is provided at the bottom of the solvent tank, a level gauge three is provided on one side of the water leg liquid collecting bag three, the bottom of the water leg liquid collecting bag three is connected to a lower pipeline three, a drain valve three is provided on the lower pipeline three, and the lower pipeline three is connected to a drain pipeline three.

[0007] The drainage pipeline 1, the drainage pipeline 2 and the drainage pipeline 3 are all connected to the main drainage pipeline, and the main drainage pipeline is connected to a dehydration tank. The top of the dehydration tank is connected to a nitrogen addition pipeline and vented to a flare pipeline.

[0008] As a preferred solution, a cooler is connected to the top of the reflux tank.

[0009] As a preferred solution, the bottom of the dehydration tank is connected to a material extraction pipeline.

[0010] Compared with the existing technology, the present invention has the following advantages: Reflow Tank 1, Reflow Tank 2, and Solvent Tank are each provided with a water leg collection bag 1, a water leg collection bag 2, and a water leg collection bag 3 at their bottoms. When the level gauge 1 indicates that the liquid level in Reflow Tank 1 is too high, drain valve 1 is opened, and the water leg collection bag begins collecting the clear water in Reflow Tank 1 and draining it to the dehydration tank. When the level gauge 2 indicates that the liquid level in Reflow Tank 2 is too high, drain valve 2 is opened, and the water leg collection bag 2 begins collecting the clear water in Reflow Tank 2 and draining it to the dehydration tank. When the level gauge 3 indicates that the liquid level in the solvent tank is too high, drain valve 3 is opened, and the water leg collection bag 3 begins collecting the clear water in the Reflow Tank and draining it to the dehydration tank. The clear water entering the dehydration tank is sent to the sewage treatment system via the material extraction pipeline.

[0011] Through the above water treatment system, the material carries the clear water content within 100~200ppm, meeting the product indicators. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 It is a schematic diagram of the connection structure of the present utility model. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0015] A water cutting device for a propylene oxide extraction system of a styrene co-production propylene oxide unit comprises a reflux tank 1, a reflux tank 2, and a solvent tank 3. A water leg liquid collecting bag 101 is provided at the bottom of the reflux tank 1, a level gauge 102 is provided on one side of the water leg liquid collecting bag 101, the bottom of the water leg liquid collecting bag 101 is connected to a lower pipeline 103, a drain valve 104 is provided on the lower pipeline 103, and the lower pipeline 103 is connected to a drain pipeline 105.

[0016] A water leg liquid collecting bag 201 is provided at the bottom of the reflux tank 2, and a level gauge 202 is provided on one side of the water leg liquid collecting bag 201. The bottom of the water leg liquid collecting bag 201 is connected to a lower pipeline 203, and a drain valve 204 is provided on the lower pipeline 203. The lower pipeline 203 is connected to a drain pipeline 205.

[0017] A water leg liquid collecting bag 301 is provided at the bottom of the solvent tank 3, and a level gauge 302 is provided on one side of the water leg liquid collecting bag 301. The bottom of the water leg liquid collecting bag 301 is connected to a lower pipeline 303, and a drain valve 304 is provided on the lower pipeline 303. The lower pipeline 303 is connected to a drain pipeline 305.

[0018] The drainage pipeline 1 105, the drainage pipeline 2 205, and the drainage pipeline 3 305 are all connected to the drainage main pipeline 4, and the drainage main pipeline 4 is connected to a dehydration tank 5. The top of the dehydration tank 5 is connected to a nitrogen addition pipeline 6 and vented to a flare pipeline 7. Adding nitrogen into the dehydration tank 5 through the nitrogen addition pipeline 6 can maintain the pressure balance in the dehydration tank 5.

[0019] Furthermore, a cooler 106 is connected to the top of the reflux tank 1.

[0020] Furthermore, the bottom of the dehydration tank 5 is connected to a material extraction pipeline 8 .

[0021] The bottoms of the reflux tank 1, reflux tank 2 and solvent tank 3 of the propylene oxide extraction system of the styrene co-production propylene oxide unit are respectively provided with a water leg liquid collecting bag 101, a water leg liquid collecting bag 201 and a water leg liquid collecting bag 301. When the interface level gauge 102 shows that the liquid level of the reflux tank 1 is too high, the drain valve 104 is opened, and the water leg liquid collecting bag 101 starts to collect the clear water in the reflux tank 1 and discharge it to the dehydration tank 5; when the interface level gauge 202 shows that the liquid level of the reflux tank 2 is too high, the drain valve 204 is opened, and the water leg liquid collecting bag 201 starts to collect the clear water in the reflux tank 2 and discharge it to the dehydration tank 5; when the interface level gauge 302 shows that the liquid level of the solvent tank 3 is too high, the drain valve 304 is opened, and the water leg liquid collecting bag 301 starts to collect the clear water in the reflux tank 3 and discharge it to the dehydration tank 5. The clear water flowing into the dehydration tank 5 is sent to the sewage treatment system through the material extraction pipeline 8.

[0022] Through the above water treatment system, the material carries the clear water content within 100~200ppm, meeting the product indicators.

[0023] The above is a detailed description of the specific implementation of the present invention, but it is only used as an example. The present invention is not limited to the specific implementation cases described above, and equivalent modifications to the present invention are also within the scope of protection of the present invention.

Claims

1. A water cutting device for the propylene oxide extraction system of a styrene co-production propylene oxide device, characterized in that: It comprises a reflux tank 1 (1), a reflux tank 2 (2), and a solvent tank (3); the bottom of the reflux tank 1 (1) is provided with a water leg liquid collecting bag 1 (101); one side of the water leg liquid collecting bag 1 (101) is provided with a level gauge 1 (102); the bottom of the water leg liquid collecting bag 1 (101) is connected to a lower pipeline 1 (103); a drain valve 1 (104) is provided on the lower pipeline 1 (103); and the lower pipeline 1 (103) is connected to a drain pipeline 1 (105); A water leg liquid collecting bag 2 (201) is provided at the bottom of the reflux tank 2 (2), a level gauge 2 (202) is provided on one side of the water leg liquid collecting bag 2 (201), the bottom of the water leg liquid collecting bag 2 (201) is connected to a lower pipeline 2 (203), a drain valve 2 (204) is provided on the lower pipeline 2 (203), and the lower pipeline 2 (203) is connected to a drain pipeline 2 (205); A water leg liquid collecting bag 3 (301) is provided at the bottom of the solvent tank (3), a level gauge 3 (302) is provided on one side of the water leg liquid collecting bag 3 (301), the bottom of the water leg liquid collecting bag 3 (301) is connected to a lower pipeline 3 (303), a drain valve 3 (304) is provided on the lower pipeline 3 (303), and the lower pipeline 3 (303) is connected to a drain pipeline 3 (305); The drainage pipeline 1 (105), the drainage pipeline 2 (205), and the drainage pipeline 3 (305) are all connected to the drainage main pipeline (4), and the drainage main pipeline (4) is connected to a dehydration tank (5). The top of the dehydration tank (5) is connected to a nitrogen addition pipeline (6) and vented to a flare pipeline (7).

2. The water cutting device of the propylene oxide extraction system of the styrene co-production propylene oxide device according to claim 1, characterized in that: The top of the reflux tank (1) is connected to a cooler (106).

3. The water cutting device of the propylene oxide extraction system of the styrene co-production propylene oxide device according to claim 1, characterized in that: The bottom of the dehydration tank (5) is connected to a material extraction pipeline (8).

Images