Adsorption tower annular chamber anti-pollution system and anti-pollution method thereof

Abstract

The invention belongs to the field of chemical engineering, and particularly relates to an adsorption tower annular chamber anti-pollution system and an anti-pollution method thereof, an upper grid onthe Nth layer of an adsorption tower is communicated with a feeding main pipe, a lower grid on the Nth layer of the adsorption tower is communicated with a liquid outlet main pipe, the feeding main pipe is connected with the liquid outlet main pipe through a bypass pipeline, and a bypass switch valve is arranged on the bypass pipeline. A bypass flow path is added to a single bed layer of the adsorption tower, a switch valve is arranged, and when extract or raffinate is opened, the bypass valve is closed; and after the extracting solution and the raffinate are closed, the bypass valve on the layer is opened to flush the annular chamber, so that the concentration of the annular chamber is stabilized.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to an anti-pollution system and an anti-pollution method for an annular chamber of an adsorption tower. Background technique [0002] When the adsorption tower of the adsorption unit of the aromatics plant is in operation, 24 bed layers are switched by program control. Due to the process design of the adsorption tower, the extract and raffinate in the first layer use the same annular chamber, which leads to two streams of materials in the annular chamber. Mutual contamination leads to unstable components of the extract and raffinate. Affect PX yield and PX purity, can lead to the risk of unqualified product when serious, loss is huge. Contents of the invention [0003] According to the defects in the above-mentioned prior art, the object of the present invention is to provide an anti-pollution system for the annular chamber of the adsorption tower, by adding bypass de...

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Problems solved by technology

[0002] When the adsorption tower of the adsorption unit of the aromatics plant is in operation, 24 bed layers are switched by program control. Due to the process design of the adsorption tower, the extract and raffinate in the first layer use the same annular chamber, which leads to two streams of materials in the annular chamber. Mutual contamination, resulting in instability of extract and raffinate components

Affect the yield of PX and the purity of PX. In severe cases, it will lead to the risk of product failure and huge losses

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