[특허]Adsorption process for continuous purification of high value gas feeds

UOP LLC

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특허 상세정보

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Adsorption process for continuous purification of high value gas feeds

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/06
미국특허분류(USC)	095/113; 095/117; 095/118; 095/119; 095/120; 095/121; 096/123; 096/125; 096/128; 096/130; 096/131; 096/143; 096/144
출원번호	US-0755453 (2004-01-12)
발명자 / 주소	Dunne,Stephen R. Coughlin,Peter K. Sethna,Rustam H.
출원인 / 주소	UOP LLC
인용정보	피인용 횟수 : 41 인용 특허 : 46

초록

Using a high pressure rotary adsorbent wheel, a high value compressed gas feed can be purified by concentrating the impurity such as water, condensing it out, before final purification. Instead of exhausting gas from the system, the effluent can be put back into the feed at a point prior to condensation of the high value gas feed, and therefore the entire feed is purified without any high value gas feed going into a waste stream.

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What is claimed is: 1. A process of producing a purified compressed gas comprising: a) providing a gas feed; b) providing at least one rotary adsorber having a multiplicity of passages through which a compressed gas can flow for adsorbing impurities therefrom, the rotary adsorber capable of adsorption of impurities from said compressed gases and of regeneration on a continuous basis as the wheel rotates; c) after said gas feed has been compressed to produce a compressed gas feed, sending said compressed gas feed through a regeneration sector of said rotary adsorber wherein said compressed gas feed removes impurities from said regeneration sector of said rotary adsorber and produces a contaminated stream of compressed gas containing said impurities; d) then cooling said contaminated stream of compressed gas and condensing condensable impurities from said contaminated stream of compressed gas within a condensing means removing a quantity of condensed impurities from said condensing means and thereby producing a cooled stream of compressed gas; and e) then passing said cooled stream of compressed gas to an adsorption sector of said rotary adsorber wherein a further quantity of impurities are removed from said compressed gas to produce a purified compressed gas product; wherein a minor portion of said cooled purified compressed gas product, having been cooled to a desired temperature, is sent to a cooling sector of said rotary adsorber to cool said cooling sector. 2. The process of claim 1 wherein after said minor portion of cooled compressed purified gas cools said cooling sector, said minor portion of cooled compressed purified gas is combined with said compressed gas feed. 3. The process of claim 2 wherein said minor portion of cooled compressed purified gas is returned to said compressed gas feed after compression of said gas feed and before said compressed gas feed passes through said regeneration sector of said rotary adsorber. 4. The process of claim 1 wherein said minor portion of cooled compressed purified gas is returned to said gas feed before compression of said gas feed. 5. The process of claim 2 wherein said minor portion of cooled compressed purified gas is boosted in pressure by a pressure boosting means and then returned to said gas feed after said gas feed is compressed. 6. The process of claim 1 wherein said minor portion is returned to said gas feed prior to said gas feed passing to said compressor. 7. The process of claim 1 wherein said minor portion of said purified compressed gas product travels co-current to said compressed gas feed in said rotary adsorber. 8. The process of claim 1 wherein said minor portion comprises about 3 to 15% by volume of said purified compressed gas product. 9. A process of producing dry compressed air comprising: a) first sending a stream of air to at least one air compressor to produce a stream of heated, compressed air; b) then passing said heated compressed air through a regeneration sector of a rotary adsorber to remove water from said regeneration sector of said rotary adsorber and thereby producing a cooled wet stream of compressed air; c) then passing said cooled wet stream of compressed gas through a heat exchanger to produce a cooler stream of compressed gas and to condense and remove a portion of water from said cooled wet stream; d) after said portion of water is removed, passing said cooler stream of compressed air to an adsorption sector of said rotary adsorber wherein a further quantity of water is removed from said cooler stream of compressed air to produce a dried compressed air product stream and wherein said adsorption sector adsorbs water from said cooler stream of compressed air; e) passing said purified compressed gas product through a second heat exchanger to cool said purified compressed gas product to a desired temperature; and f) removing from said cooled purified compressed gas product a minor portion of cooled purified compressed gas, wherein said minor portion is sent to a cooling sector of said rotary adsorber to cool said cooling sector. 10. A process of producing purified compressed gases in a two rotary contactor system wherein said two rotary contactor system comprises a first rotary adsorber and a second rotary adsorber, each of said first and second rotary adsorbers comprising a regeneration sector, an adsorption sector and a cooling sector, said process comprising: a) providing a flow of compressed gas feed; b) providing a first rotary adsorber and a second rotary adsorber, wherein each of said rotary adsorbers comprises a regeneration sector, an adsorption sector and a cooling sector; c) first sending said compressed gas feed through said regeneration sector of said first rotary adsorber to remove impurities from said regeneration sector of said first rotary adsorber and producing a contaminated stream of compressed gas containing said impurities; d) then cooling said contaminated stream of compressed gas and condensing a portion of impurities from said contaminated stream of compressed gas, removing a quantity of said condensed impurities and thereby producing a cooled stream of compressed gas; e) then passing said cooled stream of compressed gas to an adsorption sector of said first rotary adsorber wherein a further quantity of contaminants are removed from said compressed gas to produce a purified compressed gas product; f) then passing said purified compressed gas product to an adsorption sector of said second rotary adsorber wherein said adsorption sector removes a majority of remaining condensable impurities and producing a final product gas stream; and g) diverting a minor portion of said final product gas streams into at least two recycle gas streams; wherein one of said recycle gas streams is heated and then sent through a regeneration sector of said second rotary adsorber and a second of said recycle gas streams is cooled and is sent through a cooling sector of said second rotary adsorber, and then the two recycle streams are reintroduced into the gas stream either prior to sending the compressed gas feed to the regeneration zone of the first rotary adsorber, or prior to sending the cooled stream of compressed gas to the adsorption sector of the first rotary adsorber, or at both points. 11. The process of claim 10 wherein the two recycle streams are combined prior to being reintroduced into the gas stream. 12. The process of claim 10 wherein the combined recycle stream passes through the cooling sector of the first rotary adsorber. 13. The process of claim 10 wherein after exiting the cooling sector of the first rotary adsorber, the combined recycle stream is boosted in pressure, and combined with the compressed gas feed prior to said stream being sent to the regeneration zone of the first rotary adsorber. 14. The process of claim 10 wherein alter exiting the cooling sector of the first rotary adsorber, the combined recycle stream is boosted in pressure, and combined with the cooled stream of compressed gas prior to said stream being sent to the adsorption zone of the first rotary adsorber. 15. The process of claim 10 wherein the regeneration stream for said second rotary adsorber travels in a direction counter-current to the direction of flow in said second rotary adsorber adsorption sector. 16. The process of claim 10 wherein the second rotary adsorber cooling stream travels in a direction counter-current to the direction of the flow in the second rotary adsorption sector. 17. The process of claim 10 wherein the second rotary regeneration effluent stream is combined with the second rotary cooling sector effluent stream prior to boosting the pressure. 18. The process of claim 17 wherein the combined stream passes through the cooling sector of the first rotary adsorber, and is combined with the main process flow upstream of the regeneration sector of the first rotary adsorber. 19. The process of claim 17 wherein the combined stream flows through the first rotary adsorber cooling sector in a direction counter-current to the flow through the first rotary adsorber adsorption sector. 20. The process of claim 17 wherein said combined recycle streams are sent through a pressure booster and then pass through the cooling sector of said first rotary adsorber. 21. The process of claim 10 wherein said there is a sharing of heat between said contaminated flow and said compressed gas feed. 22. A two-stage dryer for producing a low moisture gas stream comprising: a) at least two rotary contactors, each rotary contactor having a multiplicity of passages, through which compressed gas can flow, for adsorbing impurities therefrom, the rotary contactors being capable of adsorption of impurities from said compressed gases and of regeneration on a continuous basis as the wheel rotates and each of said rotary contactors comprising at least one adsorbent, regeneration and cooling sector; b) means to provide a compressed flow of a moisture containing gas to said regeneration sector of a first of said two rotary contactors; c) means to send said compressed flow of a moisture containing gas from said regeneration sector to a condensing means wherein condensed impurities are removed to produce a dried flow of gas; d) means to send said dried flow of gas through an adsorption zone of said first rotary contactor; e) means to send said dried flow of gas from said adsorption zone of said first rotary contactor through an adsorption zone of said second rotary contactor to produce a very dry gas product stream; f) means to send a majority portion of said very dry gas stream to be used as product; and g) means to send two minority portions of said very dry gas stream, a first of said minority portions to be first heated to a desired temperature and then to be sent to a regeneration zone of said second rotary contactor and a second of said minority portions to be cooled to a desired temperature and then to be sent to a cooling zone of said rotary contactor. 23. The two-stage dryer of claim 22 wherein said first of said minority portions passes through a pressure boosting means after passing through said regeneration sector and then is returned to said moisture containing gas. 24. The two-stage dryer of claim 22 wherein said second of said minority portions passes through a pressure boosting means after passing through said cooling sector and ten is returned to said moisture containing gas.

이 특허에 인용된 특허 (46)

이 특허를 인용한 특허 피인용횟수: 41

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Adsorption process for continuous purification of high value gas feeds

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Adsorption process for continuous purification of high value gas feeds

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이 특허에 인용된 특허 (46)

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