Method and device for highly purifying gas

Abstract

The invention discloses a method and a device for highly purifying gas. The method comprises the steps that: alkali metal in a closed container is heated to produce alkali metal atom steam, then gas required to be purified is fed into the container, and alkali metal surface, the alkali metal atom steam and water, oxygen and oxygen impurities contained in the gas required to be purified are subjected to reaction and purification; the gas required to be purified flows out of the container after reaction and purification. The device has excellent property of highly gas purifying, particularly has pertinency, and eliminates the hidden danger that alkali metal in a laser pre-polarization system of a magnetic resonance contrast medium is oxidized. The method can be applied to the manufacture of similar operating systems or devices containing alkali metal, such as highly purifying working gas of atomic steam bubbles in an atomic frequency standard, an atomic filter, an atomic magnetometer and other systems.

Description

technical field [0001] The invention belongs to the field of gas purification, and specifically relates to a highly purified gas purification method based on the chemical reaction of alkali metals and their alkali atom vapors with impurities such as trace water and oxygen in the gas, and provides a safe and stable anti-oxidation The gas purification device is especially suitable for the laser prepolarization system of the magnetic resonance contrast agent in the continuous flow and intermittent working mode. Background technique [0002] Magnetic resonance contrast agents (such as 3 He, 129 Xe and other inert gases) after laser prepolarization, can improve the detection sensitivity of contrast agents by ~100,000 times, and it is expected to establish a new scientific research or clinical equipment for the visualization of lung and brain functions. [0003] For the laser prepolarization system of magnetic resonance contrast agents that work in continuous flow or intermitten...

AI Technical Summary

Problems solved by technology

However, the results of its use show that: 1) it can slow down the oxidation process of alkali metals in the laser prepolarization system of magnetic resonance contrast agents, but it is still difficult to eliminate the hidden danger of gradual oxidation of alkali metals; 2) when they are newly installed, due to The different sizes of the deoxygenation capacity will make the laser prepolarization system of the magnetic resonance contrast agent "sleep" for a period of time, and they also absorb the contrast agent gas, thereby reducing the efficiency of purifying the working gas and greatly affecting the The laser prepolarization system of magnetic resonance contrast agent works continuously or intermittently for a long time

Images