Method for removing acid gases in cracked gas

A technology of acid gas and cracked gas

Active Publication Date: 2007-12-26
CHINA PETROLEUM & CHEM CORP +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] In order to overcome the shortcomings of large equipment investment, low absorption efficiency, and high operating costs in the method of using absorption tower technology to remove

Method used

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  • Method for removing acid gases in cracked gas
  • Method for removing acid gases in cracked gas

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Embodiment Construction

[0053] In order to better understand the present invention, the following examples are provided, but the present invention is not limited to the examples.

[0054] Below in conjunction with the alkaline cleaning section of the ethylene process with an annual output of 800,000 tons, the process of using the absorption tower and the high-gravity rotating bed for alkaline cleaning is compared to illustrate the effect of the present invention.

[0055] Annual output of 800,000 tons of ethylene process, flow rate of cracked gas: 296.18 tons / hour, pressure 1698KPa, temperature 46°C, composition of cracked gas is shown in Table 1. The gas-liquid phase load of each section is shown in Table 2. After treatment, the total content of carbon dioxide and hydrogen sulfide in the cracked gas is less than 1ppm.

[0056] Table 1 cracked gas composition (unit: mol%)

[0057] h 2 o

H 2

CO

CO 2

h 2 S

CH 4

C 2

C 3

C 4

C 5 above ...

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Abstract

This invention provides a method for removing acidic gas from cracked gas. The method comprises: introducing cracked gas containing acidic gas through a gas inlet into a super-gravitational revolving bed device, adequately contacting with alkaline absorbent or water in the rotor filler layer, removing acidic gas, and exhausting through a gas outlet to obtain cracked gas with acidic gas content below 1 ppm. The method has such advantages as low apparatus investment, low energy consumption, low operation cost, and low apparatus space occupation.

Description

technical field [0001] The invention relates to a method for removing acid gas in cracked gas, in particular to a method for removing acid gas in cracked gas by using a high-gravity rotating bed technology. Background technique [0002] In industry, the cracked gas from steam cracking to ethylene usually contains hydrogen sulfide, carbon dioxide and organic sulfur (collectively referred to as: acid gas), and the acid gas causes great harm to the subsequent separation. First of all, when the sulfur content is high, the equipment will be severely corroded and the service life of the equipment will be shortened. At the same time, sulfur can also shorten the life of the molecular sieve of the dry cracked gas and poison the palladium catalyst used for deacetylation. Secondly, carbon dioxide is easy to form dry ice during the subsequent low-temperature separation operation to block equipment and pipelines, disrupting normal production. More importantly, acid gas impurities are al...

Claims

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Application Information

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IPC IPC(8): C10G70/00
Inventor 戴伟李振虎郭锴陈建峰陈硕郭奋程建民廖丽华
Owner CHINA PETROLEUM & CHEM CORP
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