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Loop tube reactor and control method of loop tube reactor

A loop reactor and control method technology, applied in chemical instruments and methods, chemical/physical/physicochemical fixed reactors, control/regulation processes, etc., to achieve uniform temperature distribution, uniform liquid-solid mixing, and reduce risks Effect

Pending Publication Date: 2019-10-29
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to propose a loop reactor and a control method for the loop reactor, which solves the problem that the existing loop reactor effectively prevents particles from swelling and coalescing without affecting the catalyst reaction activity and product quality.

Method used

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  • Loop tube reactor and control method of loop tube reactor
  • Loop tube reactor and control method of loop tube reactor
  • Loop tube reactor and control method of loop tube reactor

Examples

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Embodiment 1

[0038] This embodiment provides a loop reactor, such as figure 1 As shown, the loop reactor includes a loop body 1 that is circulated by multiple pipelines, and a communication pipeline 2 that communicates with two adjacent pipelines in the loop body 1, and the communication pipeline 2 is connected to the loop body 1. Two adjacent pipelines form a circulation loop, which makes the liquid-solid mixing in the loop reactor more uniform, and the temperature distribution in the flow field is also more uniform, thus reducing the risk of triggering swelling coalescence. The loop body 1 is provided with at least two axial flow pumps 3, which can ensure the uniformity of liquid-solid mixing after the particles swell and coalesce, slow down the swelling degree of the particles, and prevent the blockage of the loop reactor.

[0039] Further, the ring pipe body 1 includes at least one group of horizontal pipelines, each group of horizontal pipelines includes at least one horizontal bottom...

Embodiment 2

[0056] This embodiment provides a loop reactor. The difference between this embodiment and Embodiment 1 is that the structure of the loop body 1 is different, and the arrangement of the communication pipeline 2 is different.

[0057] Such as figure 2 As shown, the ring pipe body 1 includes two sets of horizontal pipelines, and each set of horizontal pipelines includes two horizontal bottom pipes 11, and the two ends of the horizontal bottom pipes 11 are respectively connected to the ascending pipeline 12 and the descending pipeline 13, and connected to The connecting pipe 14 of the ascending pipeline 12 and the descending pipeline 13, the horizontal bottom pipe 11, the ascending pipeline 12, the descending pipeline 13 and the connecting pipe 14 form a pipeline in circulation. The ring pipe body 1 can also include three sets of horizontal pipelines, four sets of horizontal pipelines, five sets of horizontal pipelines, etc. The specific structure of the ring pipe body 1 is not ...

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Abstract

The invention relates to the technical field of liquid-solid slurry reactions and a loop tube reactor which comprises a loop tube body and communicating pipelines, wherein multiple pipelines are in circulation communicating in the loop tube body; the communicating pipelines are used for communicating every two adjacent pipelines in the loop tube body; the communicating pipelines and every two adjacent pipelines in the loop tube body form circulation loop tubes; and the loop tube body is internally provided with at least two axial flow pumps. Through the communicating pipelines, partial circulation loops are formed, liquids and solids are uniformly mixed, and the risk of swelling and coalescence can be reduced; and in addition, after swelling and coalescence, the liquid-solid mixing uniformity can be stilled ensured, and the granule swelling degree can be reduced. The invention further discloses a control method of the loop tube reactor. Switch valve on the communicating pipelines are opened to communicate the circulation loops; at least one axial flow pump in the loop tube body is opened; and when granules in the loop tube body is in coalescence, the switch valves on the communicating pipelines are closed, and at the same time at least two axial flow pumps in the loop tube body are opened. By adopting the method, whether the granules are in swelling coalescence or not can be monitored, and the granule swelling degree can be reduced.

Description

technical field [0001] The invention relates to the technical field of liquid-solid slurry reaction, in particular to a loop reactor and a control method for the loop reactor. Background technique [0002] In pipeline reactors for transporting liquid-solid slurries, the particles of liquid-solid slurries tend to coalesce easily due to their adhesiveness, and even block the reactors in severe cases, causing great economic losses. Taking the polyethylene synthesis process by the slurry method as an example, a loop reactor is often used in this process for high-temperature polymerization of ethylene monomer. When producing low molecular weight polyethylene, the optimal temperature for polymerization reaction is 80°C, while the critical temperature for swelling and denaturation of polyethylene particles is 85°C. The physical characteristics of particle swelling and denaturation are that the particles become extremely adhesive and easy to coalesce. The diluent molecules diffuse ...

Claims

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Application Information

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IPC IPC(8): B01J19/24B01J19/00
CPCB01J19/2435B01J19/0053B01J19/002
Inventor 杨宁周荣涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI