Preparation system for improving dicyclopentadiene refining effect

Abstract

The utility model discloses a preparation system for improving the dicyclopentadiene refining effect, and belongs to the technical field of chemical equipment systems. The device comprises a double-ring tower, a feeding pipeline is connected to the middle of the double-ring tower, a gas phase outlet at the upper end of the double-ring tower is connected with an upper inlet of a condenser, a lower liquid port of the condenser is connected with an inlet of a return tank, a gas phase outlet of the return tank is connected with a vacuum system, the vacuum system is connected with a torch system, and the torch system is connected with a gas outlet of the double-ring tower. An outlet in the bottom of the reflux tank is connected with an inlet of a reflux pump, one part of an outlet of the reflux pump is connected with the upper part of the double-ring tower for reflux, the other part of the outlet of the reflux pump is connected to a dicyclopentadiene external production system, the bottom of the double-ring tower is connected with the bottom of a reboiler, the top of the reboiler is connected with the lower part of the double-ring tower, and the top of the reboiler is connected with the upper part of the double-ring tower. The other path of the bottom of the double-ring tower is connected with an inlet of a tower kettle extraction pump, and an outlet of the tower kettle extraction pump is connected with a heavy component tank. According to the dicyclopentadiene refining device, the color number of dicyclopentadiene can be reduced, and the refining effect of dicyclopentadiene is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment systems, and specifically relates to a preparation system for improving the refining effect of dicyclopentadiene. Background Art

[0002] C5 dicyclopentadiene is an important raw material for unsaturated resins. In the cracking of C5 raw materials, cyclopentadiene is mostly present, and dicyclopentadiene is obtained after polymerization and separation. At present, there are more and more domestic dicyclopentadiene production enterprises, and the market competition is getting more and more fierce. Downstream customers have gradually increased their requirements for products, especially the color number requirements of products. The lower the color number, the more conducive to the production of high-specification resins. Under the existing preparation system environment, due to the high activity of cyclopentadiene, it is easy to self-polymerize into dicyclopentadiene. The boiling point of dicyclopentadiene is 160°C. In this way, it is easy to cause high-temperature polymerization during the dicyclo refining process, produce other by-products, and cause the color number of dicyclopentadiene to increase, resulting in poor refining effect of the product. Therefore, improving the preparation system under the existing preparation environment to improve the refining effect of dicyclopentadiene is a topic that producers need to overcome increasingly. Utility Model Content

[0003] The utility model aims at the above-mentioned problem, makes up for the deficiencies of the prior art, and provides a preparation system for improving the refining effect of dicyclopentadiene; the utility model can reduce the color number of dicyclopentadiene and improve the refining effect of dicyclopentadiene.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions.

[0005] The utility model provides a preparation system for improving the refining effect of dicyclopentadiene, comprising a double ring tower, characterized in that a feed pipeline is connected to the middle part of the double ring tower, the upper gas phase outlet of the double ring tower is connected to the upper inlet of a condenser, the lower liquid port of the condenser is connected to the inlet of a reflux tank, the gas phase outlet of the reflux tank is connected to a vacuum system, the vacuum system is connected to a flare system, the bottom outlet of the reflux tank is connected to the inlet of a reflux pump, the outlet of the reflux pump is branched, one part is connected to the upper part of the double ring tower for reflux, and the other part is connected to a dicyclopentadiene external production system, the bottom of the double ring tower is connected to the bottom of a reboiler, the top of the reboiler is connected to the lower part of the double ring tower, another part of the bottom of the double ring tower is connected to the inlet of a tower bottom production pump, and the outlet of the tower bottom production pump is connected to a heavy component tank.

[0006] Furthermore, the vacuum system includes a vacuum buffer tank and a vacuum pump, the top outlet of the vacuum buffer pump is connected to the inlet of the vacuum pump, the inlet of the vacuum buffer tank is connected to the gas phase outlet of the condenser, and the outlet of the vacuum pump is connected to the flare system.

[0007] Furthermore, a first regulating valve is provided on the pipeline connecting the reflux pump and the double-loop tower.

[0008] Furthermore, a second regulating valve is provided on the pipeline connecting the reflux pump and the dicyclopentadiene external procurement system.

[0009] Furthermore, a third regulating valve is provided on the feed pipeline.

[0010] The beneficial effects of the utility model.

[0011] The utility model optimizes the atmospheric pressure separation of the traditional system into vacuum separation, changes the vacuum degree, lowers the operating temperature of the double-ring tower, reduces the generation of by-products, reduces the color number of dicyclopentadiene, and prevents the production of high-color dicyclopentadiene and the enrichment of by-products in the tower through reflux control and external production from the tower bottom, thereby jointly improving the refining effect of dicyclopentadiene. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model and are not used to limit the utility model.

[0013] Figure 1 It is a schematic diagram of the complete system connection structure of the utility model.

[0014] Markings in the figure: 1 is a double ring tower, 2 is a feed pipeline, 3 is a condenser, 4 is a reflux tank, 5 is a flare system, 6 is a reflux pump, 7 is a dicyclopentadiene external production system, 8 is a reboiler, 9 is a tower bottom production pump, 10 is a heavy component tank, 11 is a vacuum buffer tank, 12 is a vacuum pump, 13 is a first regulating valve, 14 is a second regulating valve, and 15 is a third regulating valve. DETAILED DESCRIPTION

[0015] As shown in the accompanying drawings, this embodiment provides a preparation system for improving the refining effect of dicyclopentadiene, including a double ring tower 1, a feed pipeline 2 connected to the middle of the double ring tower 1, and a third regulating valve 15 is provided on the feed pipeline 2 for adjusting the flow rate of the feed to maintain the negative pressure operation of the preparation system.

[0016] The upper gas phase outlet of the double ring tower 1 is connected to the upper inlet of the condenser 3, the lower liquid port of the condenser 3 is connected to the inlet of the reflux tank 4, the gas phase outlet of the reflux tank 4 is connected to the vacuum system, the vacuum system includes a vacuum buffer tank 11 and a vacuum pump 12, the top outlet of the vacuum buffer pump is connected to the inlet of the vacuum pump 12, the inlet of the vacuum buffer tank 11 is connected to the gas phase outlet of the condenser 3, and the outlet of the vacuum pump 12 is connected to the flare system 5.

[0017] The boiling point of dicyclopentadiene is reduced under vacuum. Under the vacuum condition of -0.9Mpa, the bottom temperature of the double-ring tower 1 is stabilized at 120°C and the top temperature is 80°C, which reduces the generation of by-products and reduces the color number of pentacyclopentadiene.

[0018] The bottom outlet of the reflux tank 4 is connected to the inlet of the reflux pump 6. The outlet of the reflux pump 6 is split, and a part of it is connected to the upper part of the double ring tower 1 for reflux. The refining effect is improved by reflux control. A first regulating valve 13 is provided on the pipeline connecting the reflux pump 6 and the double ring tower 1 to adjust the reflux flow rate and maintain the negative pressure operation of the preparation system.

[0019] The other part is connected to the dicyclopentadiene external procurement system 7. A second regulating valve 14 is provided on the pipeline connecting the reflux pump 6 and the dicyclopentadiene external procurement system 7 to maintain negative pressure operation of the preparation system.

[0020] The bottom of the double ring tower 1 is connected to the bottom of the reboiler 8, the top of the reboiler 8 is connected to the lower part of the double ring tower 1, another path of the bottom of the double ring tower 1 is connected to the inlet of the tower bottom extraction pump 9, the outlet of the tower bottom extraction pump 9 is connected to the heavy component tank 10, and the heavy components in the double ring tower 1 are extracted through the tower bottom extraction pump 9 to prevent the enrichment of the heavy components from causing the quality of dicyclopentadiene to decrease, thereby improving the refining effect.

[0021] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.

Claims

1. A preparation system for improving the refining effect of dicyclopentadiene, comprising a double ring tower (1), characterized in that: The feed pipeline (2) is connected to the middle of the double ring tower (1); the upper gas phase outlet of the double ring tower (1) is connected to the upper inlet of the condenser (3); the lower liquid outlet of the condenser (3) is connected to the inlet of the reflux tank (4); the gas phase outlet of the reflux tank (4) is connected to the vacuum system; the vacuum system is connected to the flare system (5); the bottom outlet of the reflux tank (4) is connected to the inlet of a reflux pump (6); the outlet of the reflux pump (6) is split, one part is connected to the upper part of the double ring tower (1) for reflux, and the other part is connected to the dicyclopentadiene external production system (7); the bottom of the double ring tower (1) is connected to the bottom of a reboiler (8); the top of the reboiler (8) is connected to the lower part of the double ring tower (1); another part of the bottom of the double ring tower (1) is connected to the inlet of a tower bottom production pump (9); the outlet of the tower bottom production pump (9) is connected to the heavy component tank (10).

2. The preparation system for improving the refining effect of dicyclopentadiene according to claim 1, characterized in that: The vacuum system comprises a vacuum buffer tank (11) and a vacuum pump (12), wherein the top outlet of the vacuum buffer tank (11) is connected to the inlet of the vacuum pump (12), the inlet of the vacuum buffer tank (11) is connected to the gas phase outlet of the condenser (3), and the outlet of the vacuum pump (12) is connected to the flare system (5).

3. The preparation system for improving the refining effect of dicyclopentadiene according to claim 1, characterized in that: A first regulating valve (13) is provided on the pipeline connecting the reflux pump (6) and the double-ring tower (1).

4. The preparation system for improving the refining effect of dicyclopentadiene according to claim 1, characterized in that: A second regulating valve (14) is provided on the pipeline connecting the reflux pump (6) and the dicyclopentadiene external procurement system (7).

5. The preparation system for improving the refining effect of dicyclopentadiene according to claim 1, characterized in that: The feed pipeline (2) is provided with a third regulating valve (15).

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