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Asynchronous parallel propylene adsorption recovery method

An adsorption recovery, asynchronous technology, applied in the direction of adsorption purification/separation, to achieve the effect of full recovery, improve recovery efficiency, and improve recovery rate

Inactive Publication Date: 2015-09-30
沧州华海炼油化工有限责任公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] In short, although there are some polypropylene tail gas treatment methods in the prior art, there are still certain problems, and there is still room for improvement of the process

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  • Asynchronous parallel propylene adsorption recovery method

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] A kind of asynchronous parallel type propylene adsorption recovery method, it uses such as figure 1 As shown in the equipment, the method uses six adsorption beds for adsorption at the same time, all the adsorption beds are connected in parallel, all the adsorption beds are provided with air inlets at the bottom and gas outlets at the top, and all the adsorption beds are asynchronously parallel Work in the same way, wherein the adsorption recovery process of each adsorption bed is carried out according to the following steps:

[0029] (1) Pressurization process: Fill nitrogen into the adsorption bed to make the pressure in the adsorption bed reach 1.6MPa;

[0030] (2) Adsorption process: Fill the raw material gas 8 from the inlet of the adsorption bed described in step (1) through the intake manifold 7, and the original nitrog...

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Abstract

The invention discloses an asynchronous parallel propylene adsorption recovery method, and belongs to the technical field of propylene recovery. According to the method, two or more adsorption beds are utilized for simultaneous adsorption; all the adsorption beds are connected in parallel; air inlets and air outlets are formed in the bottoms and the tops of all the adsorption beds; all the adsorption beds operate in an asynchronous parallel manner; the adsorption recovery process of each adsorption bed comprises the steps of pressurization, adsorption, pressure equalization and reduction, reverse release, vacuuming, pressure equalization and boosting, and the like. The method has the advantages that the failure resistant capability is high, nitrogen can be sufficiently utilized, the recovery rate of propylene gas is improved, and the possibility of automation control is high.

Description

technical field [0001] The invention relates to the technical field of propylene recovery. Background technique [0002] The intermittent liquid-phase bulk method polypropylene production process is a small bulk production process, and its tail gas contains relatively high propylene. In the prior art, the tail gas is mainly recovered by membrane recovery technology, but the propylene content in the recovered tail gas is still relatively high. High, the average content can reach about 12%. [0003] At present, the tail gas with high propylene content is usually directly discharged into the atmosphere, which will not only cause huge waste, but also cause serious pollution to the environment. [0004] The invention patent with the application number of 200810223383.3 discloses a "treatment process of polypropylene tail gas produced by continuous polypropylene plant", which is suitable for continuous polypropylene production process, which uses multiple adsorption beds for cont...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04C07C7/12C07C11/06
Inventor 郭立杰马连松
Owner 沧州华海炼油化工有限责任公司