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Ethane cracking cryogenic separation process method

A technology of cryogenic separation and process method, which is applied in the field of ethane cracking to olefins, can solve the problems of high energy consumption, many equipment, complicated processes, etc., and achieve the effect of reducing investment costs and operating costs

Active Publication Date: 2019-10-29
北京恒泰洁能科技有限公司 +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0008] The present invention aims at the disadvantages of high energy consumption, many equipments and complicated process in the cracked gas cryogenic separation process of the existing ethane cracking process, and proposes a cryogenic separation process in which mixed refrigerant replaces ethylene and propylene cascade refrigeration

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  • Ethane cracking cryogenic separation process method

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Embodiment Construction

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on The embodiments of the present invention and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] Below in conjunction with accompanying drawing, invention is described in further detail.

[0042] figure 1 It schematically shows an ethane cracking cryogenic separation process method according to the present invention.

[0043] The invention discloses a process method for ethane cracking and cryogenic separation, which comprises the following steps:

[0044] (1) The pyrolysis gas from the top of the quench tower (temperature around 4...

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Abstract

The invention discloses an ethane cracking cryogenic separation process method. A process method of multi-stage rectification and mixed refrigerant refrigeration is adopted for treatment on pyrolysisgas generated in an existing ethane cracking process, and the pyrolysis gas generated during ethane cracking is subjected to purification treatment to obtain products such as polymer-grade ethylene. Because a cryogenic separation system is used instead of a cryogenic separation process with ethylene and propylene cascade refrigeration, input of relative refrigeration equipment is reduced, the investment cost is greatly reduced, the procedure is simplified, the operative difficulty is reduced, and the operative energy consumption of the whole device is lessened.

Description

technical field [0001] The invention belongs to the field of ethane cracking to produce olefins in the petrochemical industry, and relates to a cryogenic separation process method for ethane cracking, which purifies cracked gas produced by ethane cracking to obtain polymer grade ethylene and other products. Background technique [0002] Ethylene is the most basic and important petrochemical raw material, and the production capacity of ethylene represents the development level of a country's petrochemical industry; in China and even in the world, steam cracking of petroleum products is the main source of ethylene products, although the development of methanol to olefins in China in recent years Soon, but its ethylene production capacity is not incomparable with steam cracking. [0003] Among all raw materials for steam cracking to produce ethylene, ethane is the pressure with the highest ethylene yield, which can reach 80.5%; the main raw material for steam cracking is naphth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J3/02C07C11/04
CPCC07C11/04F25J3/0219F25J3/0238
Inventor 任小坤
Owner 北京恒泰洁能科技有限公司