Mechanical magneto-oxygen meter pretreatment system for on-line detection of oxygen content in cracking gas

Abstract

The invention relates to a mechanical magneto-oxygen meter pretreatment system and method for on-line detection of oxygen content in a cracking gas. The pretreatment method comprises the following steps: feeding a cracking gas sample in a coarse filter for dust removal through a sampling probe, removing liquid water and cooling through a water scrubber, and then separating gas and liquid through agas-liquid separation tank; further carrying out water removal on separated gas through a first-stage water remover and then gas-liquid separation through a gas-liquid separator; demisting and dehumidifying the separated gas by an aerial fog dirt separator, and then performing water removal again through a two-stage water remover after demisting, carrying out fine water removal on the gas subjected to the water removal through a three-stage water remover, and filtering the gas subjected to the fine water removal through a bypass filter, entering a bypass to return from one side and entering afive-way valve of an analyzer from the other side, performing the water removal on the sample through a water arrester after passing through the five-way valve, and then entering the analyzer to detect and analyze the oxygen content. After being treated by the treatment system and then subjected to the on-line analysis, the cracking gas sample is high in accuracy of the obtained oxygen content, strong in stability and not likely to make mistakes.

Description

technical field [0001] The invention belongs to the field of chemical gas detection, and in particular relates to a mechanical magnetic oxygen meter pretreatment system and method for on-line detection of cracked gas oxygen content. Background technique [0002] Acetylene is widely used to synthesize a series of organic products such as acetaldehyde, acetic acid, plastics, fibers, etc. The main raw materials for the production of acetylene are calcium carbide and natural gas. For a long time, the calcium carbide method has been used to produce acetylene in China, but due to its large pollution, the calcium carbide method is used to produce acetylene. will become increasingly difficult. With the continuous enhancement of people's environmental awareness, many domestic enterprises have begun to use natural gas as raw material to produce acetylene. For example, Chongqing Chiyuan Chemical Industry uses the partial oxidation of natural gas to produce acetylene, fully mixing natur...

AI Technical Summary

Problems solved by technology

During the use of the magnetic oxygen meter, due to unreasonable selection of materials for the pretreatment system, unreasonable design of the size of the water scrubber, and unreasonable design of the gas-liquid separator, etc., the online analysis of oxygen content is inaccurate, the stability is poor, and the display is seriously lagging behind. Etc., it is prone to display errors, causing the device to stop by mistake, etc., resulting in large economic losses, which is not conducive to the normal operation of the device

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