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System for adjusting ethylene output

An ethylene production technology, applied in the system field of adjusting ethylene production, can solve the problems of high storage cost, harsh storage conditions, and low ethylene, and achieve the effects of reducing dependence, eliminating surplus, and saving costs

Inactive Publication Date: 2015-08-19
JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the extremely low boiling point of ethylene and its flammable and explosive characteristics, the storage conditions are harsh and the storage cost is expensive.

Method used

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  • System for adjusting ethylene output

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Embodiment Construction

[0022] The present invention is described now in conjunction with accompanying drawing. Such as figure 1 Shown is a schematic structural diagram of a system for adjusting ethylene production according to the present invention, which includes a rectification tower 1 and a circulating ethylene pipeline 2 connected to the top of the rectification tower 1 .

[0023] More specifically, a pressure transmitter 3 is installed at the top of the rectification column 1, and a circulating ethylene pipeline regulating valve 4 is connected in series in the circulating ethylene pipeline 2, and the pressure transmitter 3 is electrically connected to the circulating ethylene pipeline regulating valve 4.

[0024] Continue to refer to figure 1 , In a preferred embodiment, the system of the present invention further includes a return tank 5 having a return inlet and a return outlet. For the reflux tank 5 , the reflux inlet communicates with the top of the rectification column 1 through the refl...

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Abstract

The invention provides a system for adjusting ethylene output. The system comprises a rectifying tower (1) and a cyclic ethylene pipeline (2) connected at the top of the rectifying tower (1), a pressure transmitter (3) is arranged at the top of the rectifying tower (1), cyclic ethylene pipeline adjusting valves (4) are serially connected in the cyclic ethylene pipeline (2), and the pressure transmitter (3) is electrically connected with the cyclic ethylene pipeline adjusting valves (4). By the aid of the system for adjusting the ethylene output, the ethylene rectifying operations are at least realized, the quality of ethylene products is ensured, the ethylene production can be flexibly adjusted, investment of ethylene storage facilities is reduced, and waste of ethylene resources is avoided.

Description

technical field [0001] The present invention relates to a system for regulating ethylene production. Background technique [0002] In the existing rectification system, when there is a large change in the demand for the gas phase product obtained by rectification, the demand is often adjusted by adjusting the outlet flow. However, this method is likely to cause changes in the internal pressure at the top of the rectification tower, thereby affecting the stability of the operation of the rectification tower, and further affecting the quality of the gas phase product. [0003] For example, in the methanol-to-propylene (MTP) process, if there is a device with a large variation in ethylene demand downstream, such as a polypropylene device, the process control scheme will show a fatal flaw. Because different grades of polypropylene require different proportions of ethylene to be added as comonomers, the demand for ethylene in polypropylene plants varies greatly, which requires t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C7/04
Inventor 王梓旭王秋红刘学线李睿柴立忠赵冰孙旭陈东金娜霍宝胜王乐天
Owner JILIN DESIGNING INST OF CNPC NORTHEAST REFINING & CHEM ENG
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