摘要:
A first gas present at low concentration in a source gas is recovered from the source gas (comprising a fast first gas and a slow second gas) at a relatively high recovery using a particular scheme of three gas separation membrane stages. The non-permeate from the first stage is a product gas comprising the slow gas. The second stage feeds non-permeate to the third stage. The third stage non-permeate is combined with the gas fed to the first stage. The permeate from the second stage is divided into two portions. The second portion is a product gas comprising the fast gas. The first portion is combined with the permeates from the first and third stages and the combination is compressed and fed to the second stage. The invention is particularly applicable for separation of Helium from natural gas.
摘要:
A fast gas is recovered from a feed gas containing a fast gas and at least one slow gas using a gas separation membrane. A controller may control a control valve associated with a partial recycle of a permeate gas from the membrane for combining with the feed gas. A controller may control a control valve associated with the backpressure of a residue gas from the membrane.
摘要:
Process and apparatus for producing helium, neon, or argon product gas using an adsorption separation unit having minimal dead end volumes. A second separation unit receives a stream enriched in helium, neon, or argon, and a stream is recycled from the second separation unit back to the adsorption separation unit in a controlled manner to maintain the concentration of the helium, neon, or argon in the feed to the separation unit within a targeted range.
摘要:
A method of producing high-purity helium, which contains the step of: producing high-purity helium of 99.99 mol % or higher, by a process in which crude helium having a helium concentration of 40 to 90 mol % is, at least, permeated through a separation membrane module composed of a plurality of glass hollow fiber membrane.
摘要:
A fast gas is recovered from a feed gas containing a fast gas and at least one slow gas using a gas separation membrane. A controller may control a control valve associated with a partial recycle of a permeate gas from the membrane for combining with the feed gas. A controller may control a control valve associated with the backpressure of a residue gas from the membrane.
摘要:
A fast gas is recovered from a feed gas containing a fast gas and at least one slow gas using a gas separation membrane. A controller may control a control valve associated with a partial recycle of a permeate gas from the membrane for combining with the feed gas. A controller may control a control valve associated with the backpressure of a residue gas from the membrane.
摘要:
A first gas present at low concentration in a source gas is recovered from the source gas (comprising a fast first gas and a slow second gas) at a relatively high recovery using a particular scheme of three gas separation membrane stages. The non-permeate from the first stage is a product gas comprising the slow gas. The second stage feeds non-permeate to the third stage. The third stage non-permeate is combined with the gas fed to the first stage. The permeate from the second stage is divided into two portions. The second portion is a product gas comprising the fast gas. The first portion is combined with the permeates from the first and third stages and the combination is compressed and fed to the second stage. The invention is particularly applicable for separation of Helium from natural gas.
摘要:
A method which separates a component which is easily adsorbed by an adsorbent and a component which is not easily adsorbed by the adsorbent, from a feed gas which includes at least two kinds of components, with adsorption columns, wherein the adsorbent is filled in the adsorption columns and has strong adsorbability with respect to at least one kind of component included in the feed gas, and also has weak adsorbability with respect to at least one kind of other components included in the feed gas, and a temperature of the adsorbents which is filled in the column is maintained to be higher than the highest temperature of an ambient temperature around the adsorption columns which is variable throughout the year.
摘要:
A fast gas is recovered from a feed gas containing a fast gas and at least one slow gas using a gas separation membrane. A controller may control a control valve associated with a partial recycle of a permeate gas from the membrane for combining with the feed gas. A controller may control a control valve associated with the backpressure of a residue gas from the membrane.
摘要:
A method which separates a component which is easily adsorbed by an adsorbent and a component which is not easily adsorbed by the adsorbent, from a feed gas which includes at least two kinds of components, with adsorption columns, wherein the adsorbent is filled in the adsorption columns and has strong adsorbability with respect to at least one kind of component included in the feed gas, and also has weak adsorbability with respect to at least one kind of other components included in the feed gas, and a temperature of the adsorbents which is filled in the column is maintained to be higher than the highest temperature of an ambient temperature around the adsorption columns which is variable throughout the year.