Purification device capable of replacing argon, helium and hydrogen of adsorption column on line and process thereof

Abstract

The invention belongs to the field of gas purification and discloses a purification device capable of replacing argon, helium and hydrogen of adsorption column on line and a purification process thereof. The device comprises a raw material gas inlet valve instrument group, an auxiliary gas inlet valve instrument group, a heat exchanger, a heater, a high-temperature adsorber A, a cooler, a high-temperature adsorber B, a main gas passage flow valve, a temporary gas passage flow valve, a product gas outlet valve instrument group, an analysis gas passage valve and a purge gas passage valve. When the high-temperature adsorber A reaches its service life, it is switched to the adsorber B for operation. The process can replace non-renewable adsorbents on-line without stopping gas and produce products continuously.

Description

Technical field [0001] The invention belongs to the field of gas purification, and specifically relates to a purification device and process for argon, helium and hydrogen that can replace adsorption columns online. Background technique [0002] In order to remove the impurities of methane and nitrogen in argon, helium and hydrogen (other impurities can be removed together), a high-temperature adsorbent (generally called "getter" or "getter") is required. Although this kind of adsorbent can achieve a relatively good purification effect, according to its adsorption principle: that is, the main component of the adsorbent is a multi-element metal alloy, which forms an active surface at a certain temperature. After gas impurities contact the active surface, it will be It is captured and entered into the crystal lattice of the metal alloy to achieve the effect of separation; this type of adsorbent cannot be regenerated and recycled. After reaching saturation, it will fail and cannot b...

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Problems solved by technology

[0002] In order to remove the impurities methane and nitrogen in argon, helium and hydrogen (other impurities can be removed together), it is necessary to use an adsorbent for high temperature use (commonly known as "getter" or "getter"), Although this kind of adsorbent can achieve a relatively good purification effect, according to its adsorption principle: that is, the main active ingredient of the adsorbent is a multi-element metal alloy, which forms an active surface at a certain temperature. After the gas impurities come into contact with the active surface, they will be absorbed Capture and enter the lattice of metal alloys to achieve separation; this type of adsorbent cannot be regenerated and recycled, and when it reaches saturation, it will fail and cannot be used any more

[0003] During replacement, this type of purifier requires shutdown and cannot consistently provide acceptable product gas

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