Device for recycling ethane by utilizing cryogenic separation and method thereof
A cryogenic separation and ethylene technology, applied in cold treatment separation, refrigeration and liquefaction, liquefaction and other directions, can solve the problems of low recovery rate, high energy consumption, limited application, etc., and achieve high recovery rate, low energy consumption and high utilization value. Effect
Pending Publication Date: 2020-01-21
汇智中科(北京)技术开发有限公司
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Problems solved by technology
[0004] The existing cryogenic separation process for recovering ethylene has problems such as high energy consumption and low recovery rate, which limit its application in a wider range
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[0045] Various preferred embodiments of the present invention will be described below with reference to the accompanying drawings. The following description with reference to the accompanying drawings is provided to assist understanding of example embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to aid in understanding but they are to be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, detailed descriptions of functions and constructions well-known in the art will be omitted to make the description clearer and more concise.
[0046] Such as figure 1 As shown, a device for recovering ethylene by cryogenic separation includes a primary heat exchanger 11, a secondary heat exchanger 12, a tertiary heat exchanger 13, a dem...
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The invention discloses a device for recycling ethane by utilizing cryogenic separation and a method thereof. The device for recycling the ethane by utilizing the cryogenic separation is characterizedin that after catalytic cracking dry gas feed gas enters a first-level heat exchanger through a feed gas pipeline, the catalytic cracking dry gas feed gas enters a methane removal tower through a pipeline, the methane removal tower communicates with an ethane removal tower, an ethane product pipeline communicating with a three-level heat exchanger is arranged at the top of the ethane removal tower, an ethane finished product pipeline connected with an ethane storage tank is arranged on the three-level heat exchanger, a mixed refrigerant pipeline is divided into a mixed refrigerant gas phase input pipeline and a mixed refrigerant liquid phase input pipeline, the mixed refrigerant gas phase input pipeline sequentially communicates with the first-level heat exchanger, a second-level heat exchanger and the third-level heat exchanger, the mixed refrigerant liquid phase input pipeline communicates with the first-level heat exchanger, mixed refrigerant output pipelines communicate with a mixed refrigerant return pipeline after the mixed refrigerant output pipelines converge in the first-level heat exchanger, and an ethane refrigerant pipeline communicates with the second-level heat exchanger after the ethane refrigerant pipeline passes through a reboiler arranged at the bottom of the methane removal tower, and then communicates with an ethane refrigerant return pipeline after the ethane refrigerant pipeline passes through the first-level heat exchanger from the second-level heat exchanger. The device for recycling the ethane by utilizing the cryogenic separation reduces energy consumption and improves recovery rate.
Description
technical field [0001] The invention relates to the extraction and utilization of gas, in particular to a device and method for utilizing cryogenic separation and recovery of ethylene. Background technique [0002] Ethylene is an important basic raw material of organic chemical industry, mainly used in the production of polyethylene, ethylene propylene rubber, polyvinyl chloride, etc., and is one of the most basic raw materials of petrochemical industry. [0003] In terms of synthetic materials, it is widely used in the production of polyethylene, vinyl chloride and polyvinyl chloride, ethylbenzene, styrene and polystyrene, and ethylene-propylene rubber; in organic synthesis, it is widely used in the synthesis of ethanol, ethylene oxide and Various basic organic synthesis raw materials such as ethylene glycol, acetaldehyde, acetic acid, propionaldehyde, propionic acid and its derivatives; through halogenation, it can produce chloroethylene, chloroethane, and bromoethane; thr...
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IPC IPC(8): F25J3/02
CPCF25J3/0238F25J2215/62F25J2210/12F25J3/0219F25J3/0233F25J2215/04F25J2270/66F25J2270/60F25J2270/12F25J2270/18F25J3/0252
Inventor 王绍岭赵光浩
Owner 汇智中科(北京)技术开发有限公司