Online purifying system of waste helium generated in optical fiber manufacturing

Abstract

The invention discloses an online purifying system of waste helium generated in optical fiber manufacturing. The online purifying system comprises a recovering unit, a membrane separating unit, and a gas supplying unit, wherein the recovering unit comprises a gas collecting tank, and a booster pump; the membrane separating unit comprises an adsorber, a membrane separator, a buffer tank, and a purity analyzer; the gas supplying unit comprises a pressure stabilizing tank and a pressure adjusting valve. According to the online purifying system, by adopting a mode of combining a high-pressure adsorption technology and a membrane separation technology, purification of helium-rich tail gas is realized, and purified tail gas is supplied to an optical fiber wiredrawing cooling tower and a preformed rod manufacturing process for being used. According to the online purifying system, low-concentration waste helium with a purity of lower than 50 percent is recovered and purified, the purity of the waste helium after being purified is not less than 99 percent, and the recovering rate is not less than 70 percent. The online purifying system mainly consumes electricity; the electric power is 15-20 kW and is very small in consumption as compared with saved helium cost.

Description

technical field [0001] The invention relates to the field of helium gas recovery systems, in particular to an online purification system for waste helium gas from optical fiber manufacturing. Background technique [0002] Helium is a scarce strategic resource. As one of the helium-poor countries, China has long relied on imports, so the rational allocation and application of helium resources is particularly important. [0003] Helium has been widely used in aerospace, military, scientific research and other fields. With the development and growth of my country's industry, the consumption of helium in some industrial fields is also considerable, such as air conditioners, optical fiber cables, semiconductors and other industries. Industrial helium is generally directly consumed and discharged into the atmosphere, and the helium in the exhaust gas is not recovered, purified or post-treated. The reasons are generally that helium does not account for a high proportion of the ra...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an online purification system for waste helium gas in optical fiber manufacturing to solve the difficult problem of online recovery, purification, and secondary supply of helium-rich tail gas generated during the processing of wire drawing cooling towers and preform rods in the optical fiber industry , realize the recycling of helium resources, and reduce the waste of helium resources

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