A dehumidification and impurity removal system for gas analyzers under slightly positive and slightly negative pressure conditions

Abstract

A dehumidification and impurity removal system for a gas analyzer under slightly positive and slightly negative pressure conditions, which relates to a dehumidification and impurity removal system for a gas analyzer, a gas analyzer (1), a rotameter A (3), and a rotameter B (4 ), air pressure reducing filter A (5), jet pump (6), filter A (8), instrument air inlet (9), air pressure reducing filter B (11), filter B (12), gas The medium inlet (14), the spin cooler (16), the water removal tank (17), the gas medium outlet (18) and the waste liquid outlet (21) are reasonably connected; the present invention passes filter B and filter A Realize two-stage filtration to remove a small amount of particulate matter in the gas, and use the jet pump to overcome the problem that the micro-negative pressure or micro-positive pressure cannot be sampled or the circulation volume is too low. In order to ensure the safety of the workers, a Back blowing is added to achieve the purpose of maximally protecting the safety of operators.

Description

【Technical field】 [0001] The invention relates to a gas analyzer dehumidification and impurity removal system, in particular to a gas analyzer dehumidification and impurity removal system under slightly positive and slightly negative pressure working conditions. 【Background technique】 [0002] For some types of gas analyzers, the gas medium contains particulate impurities, water or high humidity will cause permanent damage to the gas analyzer, or become the main factor affecting the measurement results; when sending the gas medium into the gas analysis Before the instrument, it is necessary to eliminate this part of the influencing factors; for some gas medium pressures with slight positive pressure or slight negative pressure, it is necessary to take the gas medium out of the pipeline or container for measurement, so that it can be measured normally, or reduce the pressure of the gas medium. Measurement hysteresis. 【Content of invention】 [0003] In order to overcome the...

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Problems solved by technology

[0003] In order to overcome the deficiencies in the background technology, the present invention discloses a dehumidification and impurity removal system for a gas analyzer under slightly positive and slightly negative pressure conditions. A liquid accumulation tank is used to remove water, and a spin cooler is used to dehumidify, so as to finally ensure the dew point value of the gas. 5-8°C lower than the ambient temperature, through filter B and filter A to achieve two-stage filtration to remove a small amount of particles in the gas, to ensure that the diameter of the particles in the gas is not greater than 2um, to overcome the micro-negative pressure or micro For the problem that the positive pressure cannot be sampled or the circulation volume is too low, ensure that the gas circulation volume is not less than 60ml / min. The purpose of protecting the safety of workers

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