Air adsorption purification system in air separation device

A purification system and air separation plant technology, applied in the chemical industry, can solve the problems of strong subjectivity and experience, low operational reliability, and need for manual operation, so as to avoid the probability of personnel making mistakes, reduce the construction area, and reduce information exchange. and the effect of the control loop

Active Publication Date: 2019-06-14
GNSG ANHUI HONG SIFANG
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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides an air adsorption and purification system in an air separation unit, which solves the problem that the operation of the existing air separation adsorption unit requires manual operation, which is highly subjective and empirical, resulting in low operational reliability, Technical problems with high operating costs

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  • Air adsorption purification system in air separation device

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Embodiment Construction

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] The embodiment of the present application provides an air adsorption and purification system in an air separation plant, which solves the technical problems of low operational reliability and heavy workload of workers caused by a large number of manual operations in the existing air separation operation. It realizes intelligence, improves the reliability of operation, and reduces the workload of workers.

[0035] The techni...

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Abstract

The invention provides an air adsorption purification system in an air separation device, and relates to the field of chemical engineering. The air adsorption purification system comprises a first adsorption tower, a second adsorption tower, a heat exchanger and a PLC control system, wherein the first adsorption tower and the second adsorption tower are connected in parallel; a CO2 detector is arranged at the outlet end of each of the first adsorption tower and the second adsorption tower; the inlet end of the heat exchanger is connected with waste nitrogen; the outlet end of the heat exchanger is connected in series with the first adsorption tower and the second adsorption tower; and the PLC control system controls the switching of the first adsorption tower and the second adsorption tower based on CO2 content data detected by the CO2 detector. Through the application of the PLC control system, the control points of access and output of the DCS system are reduced; the workload of DCSoperators is reduced; the mistake making probability of personnel is avoided; and the system reliability is improved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an air adsorption purification system in an air separation device. Background technique [0002] Molecular sieve adsorption device is an important equipment necessary in the large-scale cryogenic rectification air separation process, which is used to separate water, CO 2 Chemical components such as high boiling point, high freezing point and combustibles such as hydrocarbons and hydrocarbons are removed from the air to reduce them to below the concentration required by the process and safety requirements. If the adsorption cannot meet the process requirements and safety requirements, water, CO 2 It will cause the low-temperature part of the air separation unit to solidify and block the pipeline, and the hydrocarbons will contact with the oxygen-enriched or pure oxygen in the air separation unit, causing a fire or even an explosion. Therefore, the normal operation of the adsorpt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04
Inventor 刘守强谢中平曹宗元王贤成胡永兵郭俊林
Owner GNSG ANHUI HONG SIFANG
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