[특허]Multistage membrane control system and process

Multistage membrane control system and process 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01D-053/22
출원번호	US-0001131 (1993-01-06)
발명자 / 주소	Thompson David R. (Grand Island NY)
출원인 / 주소	Praxair Technology, Inc. (Danbury CT 02)
인용정보	피인용 횟수 : 45 인용 특허 : 0

초록 ▼

The invention relates to the control of multistage fluid separation processes and systems. The processes and systems employ at least one recycle compressor or pump in conjunction with their associated controlling system to separate a fluid mixture in an efficient manner during off demand or turndown conditions. The operation of at least one recycle compressor or pump is controlled so as to maintain the pressure in the permeate side or sides at a set value, thus maintaining the desired pressure ratio across the multistage membrane and obtain the desired, reduced power consumption during off demand or turn-down conditions.

대표청구항 ▼

A multi-stage permeable membrane fluid separation process, said process comprising: (a) introducing a fluid feed stream into at least one-first membrane unit having a membrane at a pressure sufficient to permeate at least one fluid component of said fluid feed stream to produce first non-permeate and permeate streams; (b) passing at least a portion of said first non-permeate stream from said at least one-first membrane unit into at least one-second membrane unit having a membrane at a pressure sufficient to produce second non-permeate and permeate streams; (c) delivering said second permeate stream from said at least one-second membrane unit into at least one-third membrane unit having a membrane via a recycle compressor or pumping means having a control means to provide a pressure sufficient to produce third non-permeate and permeate streams; (d) combining at least portion of said third non-permeate stream with said fluid feed stream, said first non-permeate stream and/or said second non-permeate stream; (e) monitoring and/or sensing the pressure, flow rate and/or purity of said second permeate stream; (f) transmitting a process variable signal corresponding to the sensed and/or monitored pressure, flow rate and/or purity of said second permeate stream to a process control system adapted to transmit a corresponding output signal to said control means to control the operation of said recycle compressor or pumping means; (g) varying or reducing the flow rate of said fluid feed stream into said at least one-first membrane in response to varied or reduced product demands; (h) adjusting or reducing the capacity of said recycle compressor or pumping means with said control means in response to the monitored and/or sensed pressure, flow rate and/or purity of said second permeate stream moving toward said recycle compressor or pumping means so that a constant pressure or a substantially constant pressure at the permeate side of said at least one second membrane is maintained; and (i) recovering a pre-selected quantity of said second non-permeate stream as a product or passing a pre-selected quantity of said second non-permeate stream to additional membrane units to recover a further purified product.

이 특허를 인용한 특허 (45)

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Prasad Ravi ; Gottzmann Christian Friedrich ; Drnevich Raymond Francis, Method for producing oxygen and generating power using a solid electrolyte membrane integrated with a gas turbine.
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Gast ; Jr. William A. (Spokane WA), Nitrogen generation control systems and methods for controlling oxygen content in containers for perishable goods.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Multistage membrane control system and process 원문보기

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