Epoxy chloropropane treatment system for producing triglycidyl isocyanurate

Abstract

The utility model belongs to the technical field of separation equipment, and particularly relates to an epichlorohydrin treatment system for producing triglycidyl isocyanurate, which comprises a roughing tower and a refining tower, the bottom of the roughing tower is connected with the upper part of the refining tower through a material conveying pipeline, the bottom of the roughing tower is connected with a rough distillation reboiler, the upper part of the roughing tower is connected with a feeding pipeline, and the feeding pipeline is connected with the refining tower. The top of the roughing tower is connected with a coarse distillation condenser, the coarse distillation condenser is connected with a coarse distillation reflux tank, the bottom of the refining tower is connected with a rectification reboiler, the top of the refining tower is connected with a rectification condenser, the bottom of the refining tower is connected with a discharge pipeline, and the outer side of the roughing tower and the outer side of the refining tower are respectively provided with an upper jacket, a middle jacket and a lower jacket. The rectification condenser is connected with a rectification return tank, the rectification return tank is connected with a distillation retort, and the top of the distillation retort is sequentially connected with a primary condenser, a secondary condenser, a distillation receiving tank, a settling tank and an epoxy chloropropane storage tank. The epichlorohydrin refining device disclosed by the utility model is used for refining epichlorohydrin, so that the recovery efficiency and the purity of epichlorohydrin are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of separation equipment, and in particular relates to an epichlorohydrin treatment system for the production of triglycidyl isocyanurate. Background Art

[0002] Epichlorohydrin is an important organic chemical raw material and fine chemical product with a wide range of applications. Resins made from it exhibit strong adhesion, chemical resistance, excellent chemical stability, high impact strength, and superior dielectric properties. They are widely used in coatings, adhesives, reinforcement materials, casting materials, and electronic laminates.

[0003] In the production of triglycidyl isocyanurate, epichlorohydrin (ECH) is a key reagent. After the reaction is complete, ECH is discharged along with wastewater, causing waste and environmental pollution. Therefore, post-production recovery of ECH can improve its utilization. Currently used recovery equipment has problems such as large footprint, complex recovery operations, and lengthy processing times. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an epichlorohydrin treatment system for the production of triglycidyl isocyanurate, which recovers and refines the epichlorohydrin in the production process, improves the recovery efficiency, and obtains purer epichlorohydrin.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The epichlorohydrin processing system for the production of triglycidyl isocyanurate described in the utility model comprises a crude tower and a refining tower, the bottom of the crude tower is connected to the upper part of the refining tower through a feed pipeline, the bottom of the crude tower is connected to a crude distillation reboiler, the upper part of the crude tower is connected to a feed pipeline, the top of the crude tower is connected to a crude distillation condenser, the crude distillation condenser is connected to a crude distillation reflux tank, the bottom of the refining tower is connected to a rectifying reboiler, the top of the refining tower is connected to a rectifying condenser, the bottom of the refining tower is connected to a discharge pipeline, the outer sides of the crude tower and the outer sides of the refining tower are respectively provided with upper, middle and lower three-layer jackets, the rectifying condenser is connected to the rectifying reflux tank, the rectifying reflux tank is connected to a distillation tank, and the top of the distillation tank is sequentially connected to a primary condenser, a secondary condenser, a distillation receiving tank, a precipitation tank and an epichlorohydrin storage tank.

[0007] in:

[0008] The outlet of the crude distillation reboiler is connected to the lower part of the crude tower, and the outlet of the rectifying reboiler is connected to the lower part of the refining tower.

[0009] The tops of the crude distillation condenser and the crude distillation reflux tank are both connected to an exhaust pipe.

[0010] The bottom of the crude distillation reflux tank is connected to the upper part of the crude tower through a pipeline, and a feed pump is arranged on the pipeline.

[0011] The upper parts of the three-layer jackets on the outer side of the crude tower are all connected to steam pipes, and the lower parts of the three-layer jackets on the outer side of the crude tower are all connected to condensed water pipes.

[0012] The upper parts of the three-layer jackets on the outside of the refining tower are all connected to the steam pipeline, and the lower parts of the three-layer jackets on the outside of the refining tower are all connected to the condensate pipeline.

[0013] The bottom of the distillation reflux tank is connected to the upper part of the refining tower through a pipeline, and a feed pump is arranged on the pipeline.

[0014] The rectification condenser and the rectification reflux tank are both connected to the second exhaust pipe.

[0015] A heating jacket is provided on the outside of the distillation tank, a water inlet is provided on the upper part of the heating jacket, and a water outlet is provided on the lower part of the heating jacket.

[0016] The bottom of the distillation tank is provided with a discharge port.

[0017] The beneficial effects of the utility model are:

[0018] The utility model refines and recovers epichlorohydrin through a crude tower, a refining tower and a distillation tank, thereby improving the recovery efficiency and purity of epichlorohydrin. The continuous treatment process can reduce the waste of epichlorohydrin and improve the recovery rate of epichlorohydrin. The crude tower and the refining tower are heated in sections, thereby making the temperatures inside the crude tower and the refining tower balanced and improving the heating efficiency. The addition of the distillation tank can re-purify the epichlorohydrin treated in the refining tower, thereby greatly reducing impurities in the epichlorohydrin. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] In the figure: 1. crude tower; 2. steam pipe; 3. feed pipe; 4. crude distillation reboiler; 5. condensed water pipe; 6. crude distillation condenser; 7. crude distillation reflux tank; 8. exhaust pipe 1; 9. feed pipe; 10. distillation reboiler; 11. refining tower; 12. distillation tank; 13. distillation condenser; 14. distillation reflux tank; 15. exhaust pipe 2; 16. distillation receiving tank; 17. primary condenser; 18. secondary condenser; 19. sedimentation tank; 20. epichlorohydrin storage tank; 1101. discharge pipe; 1201. heating jacket; 1202. discharge port. DETAILED DESCRIPTION

[0021] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0022] Example 1

[0023] like Figure 1 As shown, the epichlorohydrin treatment system for the production of triglycidyl isocyanurate described in the present invention includes a crude tower 1 and a refining tower 11. The bottom of the crude tower 1 is connected to the upper part of the refining tower 11 through a feed pipe 9. The bottom of the crude tower 1 is connected to a crude distillation reboiler 4, the upper part of the crude tower 1 is connected to a feed pipe 3, the top of the crude tower 1 is connected to a crude distillation condenser 6, the crude distillation condenser 6 is connected to a crude distillation reflux tank 7, and the bottom of the refining tower 11 is connected to a distillation reboiler 10. The top of the refining tower 11 is connected to a distillation condenser 13, the bottom of the refining tower 11 is connected to a discharge pipe 1101, the outside of the crude tower 1 and the outside of the refining tower 11 are respectively provided with an upper, middle and lower three-layer jacket, the distillation condenser 13 is connected to a distillation reflux tank 14, the distillation reflux tank 14 is connected to a distillation tank 12, and the top of the distillation tank 12 is sequentially connected to a primary condenser 17, a secondary condenser 18, a distillation receiving tank 16, a precipitation tank 19 and an epichlorohydrin storage tank 20.

[0024] The use of the crude tower 1, the refining tower 11 and the distillation tank 12 to purify and recover epichlorohydrin can improve the recovery efficiency and purity of epichlorohydrin.

[0025] The outer sides of the crude tower 1 and the refining tower 11 are respectively provided with upper, middle and lower three-layer jackets, which can heat the crude tower 1 and the refining tower 11 in sections.

[0026] The outlet of the crude distillation reboiler 4 is connected to the lower part of the crude tower 1, and the outlet of the rectifying reboiler 10 is connected to the lower part of the refining tower 11.

[0027] The crude distillation reboiler 4 and the rectifying reboiler 10 can fully heat the materials at the bottom of the crude tower 1 and the rectifying tower 11 respectively.

[0028] The tops of the crude distillation condenser 6 and the crude distillation reflux tank 7 are both connected to an exhaust pipe 8. Excess gas in the crude distillation condenser 6 and the crude distillation reflux tank 7 can be discharged through the exhaust pipe 8.

[0029] The bottom of the crude distillation reflux tank 7 is connected to the upper part of the crude tower 1 through a pipeline, and a feed pump is provided on the pipeline.

[0030] The upper parts of the three-layer jackets outside the crude tower 1 are all connected to the steam pipe 2, and the lower parts of the three-layer jackets outside the crude tower 1 are all connected to the condensed water pipe 5.

[0031] The upper parts of the three-layer jacket on the outside of the refining tower 11 are all connected to the steam pipe 2 , and the lower parts of the three-layer jacket on the outside of the refining tower 11 are all connected to the condensate pipe 5 .

[0032] The bottom of the distillation reflux tank 14 is connected to the upper part of the refining tower 11 through a pipeline, and a feed pump is provided on the pipeline.

[0033] The rectifying condenser 13 and the rectifying reflux tank 14 are both connected to the exhaust pipe 2 15. Excess gas in the rectifying condenser 13 and the rectifying reflux tank 14 can be discharged through the exhaust pipe 2 15.

[0034] A heating jacket 1201 is provided on the outside of the distillation tank 12 . A water inlet is provided on the top of the heating jacket 1201 , and a water outlet is provided on the bottom of the heating jacket 1201 .

[0035] A discharge port 1202 is provided at the bottom of the distillation tank 12. The mother liquor after distillation is recovered through the discharge port 1202.

[0036] Working principle and process:

[0037] All the epichlorohydrin recovered in the production process is transported to the crude tower 1 through the feed pipe 3, and the light components are separated by heating in the crude distillation reboiler 4 at the bottom of the crude tower 1 and enter the crude distillation condenser 6 and the crude distillation reflux tank 7. The crude epichlorohydrin liquid at the bottom of the crude tower 1 is transported to the refining tower 11 for distillation. The distillation reboiler 10 at the bottom of the tower is continuously heated to make the epichlorohydrin follow the steam into the distillation condenser 13 for condensation. The condensate enters the distillation reflux tank 14 and is refluxed. The crude tower 1 and the refining tower 11 are heated in sections by steam to improve the heating efficiency. After the distillation is completed, the epichlorohydrin in the distillation reflux tank 14 is transported to the distillation tank 12 for distillation. The distilled epichlorohydrin is condensed by the primary condenser 17 and the secondary condenser 18 and then enters the distillation receiving tank 16. It then enters the precipitation tank 19 for precipitation and separation to obtain pure epichlorohydrin. The pure epichlorohydrin is transported to the epichlorohydrin storage tank 20 for storage for reuse.

Claims

1. An epichlorohydrin treatment system for the production of triglycidyl isocyanurate, comprising a crude tower (1) and a refining tower (11), characterized in that: The bottom of the crude tower (1) is connected to the top of the refining tower (11) through a feed pipe (9), the bottom of the crude tower (1) is connected to a crude distillation reboiler (4), the top of the crude tower (1) is connected to a feed pipe (3), the top of the crude tower (1) is connected to a crude distillation condenser (6), the crude distillation condenser (6) is connected to a crude distillation reflux tank (7), the bottom of the refining tower (11) is connected to a rectifying reboiler (10), the top of the refining tower (11) is connected to a rectifying condenser (13), and the refining tower (1 1) The bottom is connected to a discharge pipe (1101), the outer sides of the crude tower (1) and the refining tower (11) are respectively provided with upper, middle and lower three-layer jackets, the distillation condenser (13) is connected to a distillation reflux tank (14), the distillation reflux tank (14) is connected to a distillation tank (12), and the top of the distillation tank (12) is sequentially connected to a primary condenser (17), a secondary condenser (18), a distillation receiving tank (16), a precipitation tank (19) and an epichlorohydrin storage tank (20).

2. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 1, characterized in that: The outlet of the crude distillation reboiler (4) is connected to the lower part of the crude tower (1), and the outlet of the rectifying reboiler (10) is connected to the lower part of the rectifying tower (11).

3. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 1, characterized in that: The tops of the crude distillation condenser (6) and the crude distillation reflux tank (7) are both connected to the exhaust pipe 1 (8).

4. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 1, characterized in that: The bottom of the crude distillation reflux tank (7) is connected to the upper part of the crude tower (1) through a pipeline, and a feed pump is provided on the pipeline.

5. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 1, characterized in that: The upper parts of the three-layer jackets on the outside of the crude tower (1) are all connected to steam pipes (2), and the lower parts of the three-layer jackets on the outside of the crude tower (1) are all connected to condensate pipes (5).

6. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 5, characterized in that: The upper parts of the three-layer jacket on the outside of the refining tower (11) are all connected to the steam pipe (2), and the lower parts of the three-layer jacket on the outside of the refining tower (11) are all connected to the condensate pipe (5).

7. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 1, characterized in that: The bottom of the distillation reflux tank (14) is connected to the upper part of the refining tower (11) through a pipeline, and a feed pump is provided on the pipeline.

8. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 1, characterized in that: The distillation condenser (13) and the distillation reflux tank (14) are both connected to the exhaust pipe 2 (15).

9. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 1, characterized in that: A heating jacket (1201) is provided on the outside of the distillation tank (12), a water inlet is provided on the upper portion of the heating jacket (1201), and a water outlet is provided on the lower portion of the heating jacket (1201).

10. The epichlorohydrin treatment system for the production of triglycidyl isocyanurate according to claim 1, characterized in that: A discharge port (1202) is provided at the bottom of the distillation tank (12).

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