Adsorption tower bed leakage prevention system

Abstract

The invention relates to an adsorption tower bed leakage prevention system. The system is used for improving an adsorption tower bed leakage agent. The system comprises an adsorption tower, a lead-outpipeline from any layer of the adsorption tower is connected with a loop pipeline, a bed bypass is connected to the lead-out pipeline of the bed of the adsorption tower, the loop pipeline is directlyconnected to the bed bypass, the root of the loop pipeline is provided with a gate valve and is connected with a shower guide valve and an 8-shaped blind plate, and a first control valve and a showerguide valve are also arranged at a position, connected to the bed bypass, of the loop pipeline; and a second control valve is arranged on the bed bypass close to the first control valve on the loop pipeline, and a third control valve is arranged on a position, close to the bed, of the leading-out pipeline. Only one-time transformation needs to be carried out in a shutdown state without discardingan adsorbent, and the leaked adsorbent can be intermittently discharged through a transformed pipeline on the premise that an adsorption device is shut down for short circulation, an adsorption towerprogram is shut down and a circulating pump is shut down in order to maintain the pressure difference of the bed, so the purpose of maintaining long-period operation is achieved.

Description

technical field [0001] The invention relates to the structure of an adsorption tower, which is the core equipment of an adsorption device in the production of aromatic hydrocarbons, in particular to an adsorption tower bed layer leakage prevention system, aiming at the transformation of the adsorption tower bed layer leakage agent. Background technique [0002] The adsorption tower has a total of 24 beds, each bed is equipped with adsorbent, and there are two layers of grids between each bed. When a layer of adsorbent in the adsorption tower leaks, the leaked adsorbent falls into the grid, causing The pressure difference of the single bed layer rises. When the pressure difference of the single bed layer rises to the design pressure difference of 70KPa (the upper limit of the Axens process requirements), the device will not be able to operate and needs to be shut down for maintenance. Because the water content of the adsorbent is required to be less than 8%, it will cause adso...

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Problems solved by technology

[0002] The adsorption tower has a total of 24 beds, each bed is equipped with adsorbent, and there are two layers of grids between each bed. When a layer of adsorbent in the adsorption tower leaks, the leaked adsorbent falls into the grid, causing The pressure difference of the single bed layer rises. When the pressure difference of the single bed layer rises to the design pressure difference of 70KPa (the upper limit of the Axens process requirements), the device will not be able to operate and needs to be shut down for maintenance. Because the water content of the adsorbent is required to be less than 8%, it will cause adsorption if it exceeds the standard. The absorbent is scrapped, because the adsorption tower is shut down for maintenance, there is oil in it, and the oil needs to be removed for steam cooking, which will lead to the scrapping of the adsorbent. The price of the adsorbent is expensive, and the cost is 200 million yuan

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