CN-122006600-A - Solution process loop reactor

Abstract

The invention relates to a solution loop reactor, which comprises a loop body, a first feed pump, a heat exchanger structure, a static mixer and a reaction device, wherein an inner cavity of the loop body forms a material reaction flow loop, a total discharge hole is formed in the top end of the loop body, a feed inlet structure is formed in one side of the total discharge hole, the first feed pump is arranged at the bottom end of the loop body and used for conveying reaction materials in the material reaction flow loop, the heat exchanger structure is used for heat exchange and temperature control of the reaction materials in the material reaction flow loop and comprises at least one first heat exchanger, at least one second heat exchanger and at least one third heat exchanger, and the static mixer is arranged between the feed inlet structure and the heat exchanger structure and used for mixing the reaction materials in the material reaction flow loop so as to promote mutual dissolution of the reaction materials. The invention improves the reaction uniformity and the production efficiency by optimizing the loop design and the fluid management so as to meet the continuously changing production requirements.

Inventors

• CUI YUCHAO
• JIANG ZEYU
• ZHAO XINGLONG
• HAN JIAQI
• MIAO YUXIN
• Ji Chengquan
• SUN BINBIN
• GE TENGJIE
• WU WEI
• JIANG YANFENG

Assignees

• 中国石油天然气股份有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (14)

1. 1. A solution loop reactor, comprising: The device comprises a ring pipe body, a main discharging port and a main discharging port, wherein the inner cavity of the ring pipe body forms a material reaction flow loop; The first feed pump is arranged at the bottom end of the loop body and is used for conveying the reaction materials in the material reaction flow loop; the heat exchanger structure comprises at least one first heat exchanger arranged between the first feed pump and the feed port structure, and at least one second heat exchanger and at least one third heat exchanger arranged between the first feed pump and the total discharge port; the static mixer is arranged between the feed inlet structure and the heat exchanger structure and is used for mixing the reactant materials in the material reaction flow loop so as to promote the mutual dissolution of the reactant materials.
2. 2. The solution loop reactor of claim 1, wherein a section of said loop body between said inlet structure and said first feed pump is defined as a first loop section, a section of said loop body between said first feed pump and said total outlet is defined as a second loop section, and a flow path for alternate transfer of reactant material and alternate discharge of reactant material is provided in communication between said first loop section and said second loop section.
3. 3. The solution loop reactor of claim 2, wherein a second feed pump is disposed on the flow leg, a first end of the flow leg is in communication with an outlet of the static mixer at the first loop section, a second end of the flow leg is in communication with an inlet of the third heat exchanger at the second loop section near the total outlet, a first control valve for controlling on-off of the flow leg is disposed between the second feed pump and the first end of the flow leg, and an openable and closable leg outlet is disposed between the second feed pump and the second end of the flow leg.
4. 4. The solution process loop reactor of claim 1, wherein an outer jacket structure is provided over the loop body, the jacket structure being used for temperature control of the loop body.
5. 5. The solution loop reactor of claim 4, wherein the insulating jacket structure comprises an insulating inner wall layer which is fit and sleeved on the outer wall of the loop body, an insulating outer wall layer is sleeved on the outer side of the insulating inner wall layer, a medium space is formed between the insulating inner wall layer and the insulating outer wall layer, and a heat exchange medium is arranged in the medium space.
6. 6. The solution loop reactor of claim 5, wherein said insulating jacket is structurally connected to a temperature sensor for monitoring the temperature of the heat exchange medium in said medium space.
7. 7. The solution loop reactor of claim 5, wherein said insulating jacket is structurally connected to a pressure sensor for monitoring the pressure of the heat exchange medium in said medium space.
8. 8. The solution process loop reactor of claim 1, wherein the feed inlet structure comprises a catalyst inlet, a monomer inlet, and a feed inlet disposed in a top-down spacing.
9. 9. Solution process loop reactor according to claim 1, characterized in that the static mixer comprises a mixer housing in which a mixing unit is arranged, said mixing unit being a cylinder assembled from corrugated plates.
10. 10. The solution loop reactor of claim 1, wherein the first heat exchanger comprises a first heat exchange shell, wherein a first heat exchange tube is arranged in the first heat exchange shell, a baffle plate for changing the flow direction of fluid is arranged in the first heat exchange shell, an inner cavity of the first heat exchange tube forms a first tube pass, an inner cavity of the first heat exchange shell forms a first shell pass, a reaction material flows in the first tube pass, a heat exchange medium flows in the first shell pass, a first medium inlet is arranged at the bottom end of the first shell pass, and a first medium outlet is arranged at the top end of the first shell pass.
11. 11. The solution loop reactor of claim 1, wherein the second heat exchanger comprises a second heat exchange shell, a second heat exchange tube is disposed in the second heat exchange shell, an inner cavity of the second heat exchange tube forms a second tube side, an inner cavity of the second heat exchange shell forms a second shell side, a reaction material circulates in the second tube side, a heat exchange medium circulates in the second shell side, a second medium inlet is disposed at a top end of the second shell side, and a second medium outlet is disposed at a bottom end of the second shell side.
12. 12. The solution loop reactor of claim 1, wherein the third heat exchanger comprises a third heat exchange shell, a third heat exchange tube is disposed in the third heat exchange shell, an inner cavity of the third heat exchange tube forms a third tube pass, an inner cavity of the third heat exchange shell forms a third shell pass, a reaction material flows in the third tube pass, a heat exchange medium flows in the third shell pass, a third medium inlet is disposed at a top end of the third shell pass, and a third medium outlet is disposed at a bottom end of the third shell pass.
13. 13. The solution process loop reactor of claim 1, wherein the loop body comprises a liner having a surface that has been polished with high precision, the liner having a polishing degree of 0.4 to 0.6 μm.
14. 14. A solution process loop reactor according to claim 3, wherein said first feed pump and said second feed pump are gear pumps.

Description

Solution process loop reactor Technical Field The invention relates to the technical field of high polymer resin, in particular to a loop reactor adopting a solution method. Background In the production of polymer resins, a reactor is one of the core devices. The traditional polymer reactor adopts a batch reaction or continuous flow reaction mode, and each method has advantages and disadvantages. Batch reactors-reactors of this type are commonly used in small scale production or in production lines where frequent replacement of raw materials is required. Although the operation is simple, the requirements of different formulas can be met, the production efficiency is low, the period is long, and the constant reaction condition is difficult to maintain in the production process, so that the product quality is unstable. Continuous flow reactors-in order to improve production efficiency and uniformity, continuous flow reactors are widely used. The reactor allows continuous input of raw materials and continuous output of reaction products, thereby realizing efficient production. However, conventional continuous flow reactors tend to suffer from deficiencies in heat transfer and mixing. For example, the flow of the reaction mass in the pipe is not uniform, resulting in unstable reaction temperature and mixing effect, which may affect the quality of the final product. The prior art has the problems that ① has low heat transfer efficiency, and a heat exchange system in a traditional reactor can be poorly designed, so that heat transfer is uneven, and the temperature control and the reaction rate of the reaction are affected. ② Uneven mixing in the course of reaction, insufficient mixing of the reaction materials can lead to incomplete reaction or uneven distribution of the products, affecting the properties of the final product. ③ The existing reactor design has limitations in terms of improving the production capacity, and particularly under the high-yield requirement, the large-scale production is difficult to realize. Therefore, the inventor provides a solution method loop reactor by virtue of experience and practice in related industries for many years, so as to overcome the defects of the prior art and realize efficient and stable production of high polymer resin. Disclosure of Invention The invention aims to provide a solution-process loop reactor, which solves the problems of low heat transfer efficiency, uneven mixing, insufficient productivity and the like in the prior art, and improves the reaction uniformity and the production efficiency by optimizing the loop design and the fluid management so as to meet the continuously-changing production requirements. The object of the present invention is achieved by a solution loop reactor comprising: The device comprises a ring pipe body, a main discharging port and a main discharging port, wherein the inner cavity of the ring pipe body forms a material reaction flow loop; The first feed pump is arranged at the bottom end of the loop body and is used for conveying the reaction materials in the material reaction flow loop; the heat exchanger structure comprises at least one first heat exchanger arranged between the first feed pump and the feed port structure, and at least one second heat exchanger and at least one third heat exchanger arranged between the first feed pump and the total discharge port; the static mixer is arranged between the feed inlet structure and the heat exchanger structure and is used for mixing the reactant materials in the material reaction flow loop so as to promote the mutual dissolution of the reactant materials. In a preferred embodiment of the present invention, the pipe section of the loop body between the feed port structure and the first feed pump is a first loop pipe section, the pipe section of the loop body between the first feed pump and the total discharge port is a second loop pipe section, and a flow branch for standby transport of the reaction material and standby discharge of the reaction material is provided between the first loop pipe section and the second loop pipe section. In a preferred embodiment of the invention, a second feeding pump is arranged on the flow branch, a first end of the flow branch is communicated with an outlet position of the static mixer, a second end of the flow branch is communicated with an inlet position of the third heat exchanger, which is close to the total discharge port, of the second loop section, a first control valve for controlling on-off of the flow branch is arranged between the second feeding pump and the first end of the flow branch, and an openable branch discharge port is arranged between the second feeding pump and the second end of the flow branch. In a preferred embodiment of the present invention, a heat-insulating jacket structure is sleeved outside the collar body, and the heat-insulating jacket structure is used for controlling the temperature of the collar body. In a prefer