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Method for removing moisture in NOx-containing gas

A gas and removal technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve problems such as inaccurate measurement data, and achieve the effect of ensuring uninterrupted production and long service life

Inactive Publication Date: 2021-04-02
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the adsorption method is used to remove trace moisture in the sample, the target components will usually be removed at the same time, which will affect the determination
If cooling is used to remove moisture, part of NO and N will also be removed at the same time. 2 O so that the measurement data is not accurate

Method used

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  • Method for removing moisture in NOx-containing gas

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Embodiment Construction

[0031]The present invention will be further described below with reference to the accompanying drawings and examples, and the embodiments of the present invention include, but are not limited to the following examples.

[0032]The present invention discloses a method of removing moisture in NOx gases, removing trace moisture in the gas to be inspired, without removing trace NO, NO in the gas to be detected.2And affect NO, NO2Detection. The purification tube is removed by the preparing purification tube, and the purification tube is filled with 20-40 destination 3A molecular sieve, the purification tube is made of 316L stainless steel material, the stainless steel inner wall polished to Ra ≤ 2 μm, the effective length of the purge tube is 300mm, the outer diameter is 20mm, and the inner diameter is 16mm. Before the gas is dehydrated, the purge tube needs to be initiated for first activation, in the activation engineering, high-purity nitrogen gas matching NO and NO2The mixed gas is used...

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Abstract

The invention discloses a method for removing moisture in NOx-containing gas, and relates to the field of gas detection. The method comprises the following steps that gas to be detected is introducedinto purification pipes filled with 3A molecular sieves of 20-40 meshes; after the gas to be detected is subjected to dehydration treatment for 2 minutes, the moisture in the gas to be detected is less than 1*10<-6>(V / V), and NO and NO2 in the gas to be detected cannot be removed; and before dehydration of the purification pipes, mixed gas of high-purity nitrogen and NO and NO2 needs to be used asactivation gas for first activation. Meanwhile, a dehydration device is designed according to the method, a double-purification-pipe structure consisting of a purification pipe A tower and a purification pipe B is adopted, one is used for purification, the other is used for regeneration, and the continuity of online sampling is guaranteed.

Description

Technical field[0001]The present invention belongs to the field of gas detection, and more particularly to a method of removing moisture in NOx gases.Background technique[0002]In industrial production, trace moisture content in high purity gases is an important technical parameter. These gases trace microemers will affect process quality and reduce product availability. In order to improve product quality, it is necessary to perform real-time detection and control of water vapor concentration. When the gas is required to measure the trace NO, N2O When the moisture in the sample usually interferes with the instrument to trace NO, N2O detects. If the adsorption method is used to remove the trace moisture in the sample, the target component is typically removed simultaneously and affects the measurement. If the water is removed, the moisture is removed, and the part of the part is also removed.2O and make measurement data is not allowed.Inventive content[0003]The technical problem solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/34G01N1/44B01D53/04B01D53/26
CPCG01N1/28G01N1/34G01N1/44B01D53/04B01D53/261Y02A50/20
Inventor 成雪清唐霞梅陈春玉方艾黎陈雅丽孙晓轩周鹏云马昌宁
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND