Oxygen generator PSA carbon dioxide self-diagnosing system

Abstract

The invention discloses an oxygen generator PSA carbon dioxide self-diagnosing system which is connected with an oxygen generator PSA system. The self-diagnosing system comprises a sampling unit which is used for sampling various paths of gas of the oxygen generator PSA system, a sampling control unit connected with the sampling unit and used for controlling the on / off of the sampling unit, an analyzer used for analyzing gas collected by the sampling unit and transmitting the analysis result to a DCS system, the DCS system connected with the analyzer, and a diagnosis unit respectively electrically connected with the DCS system and the sampling control unit. The diagnosis unit performs diagnosing according to signals transmitted by the DCS system, and controls the on / off of the sampling unit through the sampling control unit.

Description

technical field [0001] The invention relates to a gas self-diagnosis system, in particular to a gas self-diagnosis system for oxygen-making equipment. Background technique [0002] PSA (Pressure Swing Adsorption, Pressure Swing Adsorption) is an air separation front-end device for large-scale low-temperature rectification oxygen generators. It is a system for purifying and pre-treating raw air. The main function of the PSA system is to remove impurities such as carbon dioxide, moisture, and hydrocarbons in the raw air, so as to avoid operational problems caused by impurities entering the air separation system and causing safety hazards. Among these impurities, carbon dioxide is the key object to be removed. [0003] For example, for a PSA system with 6 adsorbers (hereinafter referred to as "beds"), the working process is as follows: the raw air from the aftercooler of the air compressor enters the PSA system, and the system has 6 beds. It is equipped with an appropriate am...

AI Technical Summary

Problems solved by technology

[0007] 1) When the two beds A and B are working, if there is a high carbon dioxide content in the outlet main pipe, it means that at least one of the beds A and B has a high content, that is, there are three possibilities for the faulty bed: A, B or AB, which cannot be directly judged

[0008] 2) When bed C is added with adsorption, the three beds A, B, and C work at the same time. At this time, the carbon dioxide continues to maintain a high content, and there are 7 possibilities for the faulty bed: A, B, C, AB, AC, BC or ABC , cannot be directly judged

[0014] (1) It is impossible to accurately and timely judge the fault point that leads to the increase of carbon dioxide content;

[0015] (2) It takes a long time for the sampled gas to be collected from the site to the analyzer, the update speed is slow, and the analysis results lag

Images