Zero air generator

Abstract

The invention relates to a zero air generator. The zero air generator comprises a micro reaction tank with a cross cylinder shape, wherein a cross cylinder comprises two intersected straight cylinders; a slot is formed at one end of a first straight cylinder; a catalyst bottle is put into the slot; a thread is tapped at the opening of the slot; a heating rod is arranged at the other end of the first straight cylinder; a heat conductor is arranged on the end face of a second straight cylinder, which is vertical to the end face on which the heating rod is arranged; a clamping sleeve is locked on a thread hole at the open end of the first straight cylinder through the thread; a gasket is arranged between the clamping sleeve and the end face of the first straight cylinder; a connecting nut is fixedly arranged on the clamping sleeve; an air pipe passes through the connecting nut, the clamping sleeve and the gasket in turn and stretches into the slot of the first straight cylinder; the second straight cylinder is clamped on a bottom cover; and an upper cover and the bottom cover are fixed together to form a closed box body. Air is directly used as a carrier gas source, the influence of the air to measuring accuracy is eliminated, and the zero air generator has a simple structure, a good purifying effect and long service life and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of analytical instruments, specifically a portable zero-point air generator for monitoring and detecting hydrocarbon compounds Background technique [0002] When using a portable chromatograph, it is necessary to use purified zero-point air that does not contain hydrocarbons as the carrier gas. At present, the purified carrier gas of the portable chromatograph either uses an external steel cylinder to provide the gas source, but the external steel cylinder provides the gas source. Undoubtedly, the weight and volume of the entire equipment will be increased, and the gas source provided by the steel cylinder will be used up and repeated filling is required; another way to provide purified carrier gas is that the portable chromatograph has its own air pump, and the air pump is directly from the The gas is extracted from the background air, but because the background air often contains the compounds to be detect...

AI Technical Summary

Problems solved by technology

[0002] When using a portable chromatograph, it is necessary to use purified zero-point air that does not contain hydrocarbons as the carrier gas. At present, the purified carrier gas of the portable chromatograph either uses an external steel cylinder to provide the gas source, but the external steel cylinder provides the gas source. Undoubtedly, the weight and volume of the entire equipment will be increased, and the gas source provided by the steel cylinder will be used up and repeated filling is required; another way to provide purified carrier gas is that the portable chromatograph has its own air pump, and the air pump is directly from the The gas is extracted from the background air, but because the background air often contains the compounds to be detected, it will affect the accuracy of the detection when it is used as a carrier gas. Even if the purification and adsorption process is added to the carrier gas of the portable chromatograph, the adsorbent and adsorption time, the purification effect is poor and unstable, and the adsorbent needs to be replaced continuously, which increases the cost of production and use, and the structure is more complicated

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