Acetylene gas purity detection device

Abstract

The invention discloses an acetylene gas purity detection device which comprises a tube body, the tube body sequentially comprises a reaction liquid containing portion, a first plug cock, an absorption tube provided with scales, a second plug cock and a gas inlet tube which can be communicated with one another; the first plug cock comprises a plug cock shell and a valve core rotatably arranged in the plug cock shell, the valve core is provided with a first through hole which enables the reaction liquid containing portion to be communicated with the absorption tube through rotation of the valve core, the plug cock shell is provided with a second through hole matched with the first through hole, and the inner wall of the second through hole above the absorption tube is provided with a protruding block for reducing the radial cross section area of the second through hole. By means of the mode of adding the protruding block, the size of the second through hole can be controlled accurately, the size of the second through hole can be adjusted according to the volume of the absorption tube, and the liquid level of a tetrabromoethane solution is controlled to be lower than the first plug cock.

Description

technical field [0001] The invention relates to the field of gas purity detection equipment, in particular to an acetylene gas purity detection device. Background technique [0002] In the production process of acetylene gas, the purity of acetylene gas is a very important indicator of the quality of acetylene gas. For example, the price of acetylene gas with a solubility of 98% is relatively low, and it is only suitable as a raw material for gas cutting, while acetylene gas with a solubility of more than 99.8% The gas is suitable for laboratory use, but because of its higher purity, it is also more expensive. [0003] However, after the production of acetylene gas, in order to verify the purity of acetylene gas, it is generally detected by gas chromatograph and other equipment, but the detection cost of this kind of equipment is relatively high, and it is not suitable for frequent sampling inspection of acetylene gas, so it is generally detected by acetylene gas absorption ...

AI Technical Summary

Problems solved by technology

[0002] In the production process of acetylene gas, the purity of acetylene gas is a very important indicator of the quality of acetylene gas. For example, the price of acetylene gas with a solubility of 98% is relatively low, and it is only suitable as a raw material for gas cutting, while acetylene gas with a solubility of more than 99.8% The gas is suitable for laboratory use, but because of its higher purity, it is also more expensive

[0003] However, after the production of acetylene gas, in order to verify the purity of acetylene gas, it is generally detected by gas chromatograph and other equipment, but the detection cost of this kind of equipment is relatively high, and it is not suitable for frequent sampling inspection of acetylene gas, so it is generally detected by acetylene gas absorption tube For detection, in the prior art, the national standard GB6819-2004 standard document discloses this acetylene gas absorption tube, which absorbs high-pressure acetylene gas into the absorption tube through the opening below, and then injects potassium bromide into the upper opening Saturated solution, tetrabromoethane is formed through the reaction of the two, and the impurity gas in the acetylene gas cannot be absorbed by the potassium bromide solution, the impurity gas will exist under the cock of the absorption tube, and pass through the liquid of the tetrabromoethane solution below the impurity gas Read the scale on the absorption tube to determine the purity of acetylene gas

[0004] This kind of gas absorption tube is opened and closed by the cock, but there is a space between the cock and the side wall of the cock, and the impurity gas is in this space, and the scale of the absorption tube cannot be marked in the cock, so it leads to 0.01-0.02% impurities, the absorption tube can not be detected

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