CN1192813C - Pressure swing adsorption gas separating process to purify easy-to-adsorb phase and hard-to-adsorb phase simultaneously - Google Patents
Pressure swing adsorption gas separating process to purify easy-to-adsorb phase and hard-to-adsorb phase simultaneously Download PDFInfo
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- CN1192813C CN1192813C CNB011335122A CN01133512A CN1192813C CN 1192813 C CN1192813 C CN 1192813C CN B011335122 A CNB011335122 A CN B011335122A CN 01133512 A CN01133512 A CN 01133512A CN 1192813 C CN1192813 C CN 1192813C
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Abstract
The present invention relates to a pressure-variable adsorption gas separating method for simultaneously purifying an absorbable phase and a non-absorbable phase, which belongs to the technical field of the separation of mixed gas. The method solves the present problems of adsorption pressure reduction of a second section of device, adsorption capacity reduction of an adsorbing agent, great device energy consumption and much gas loss which are caused by resistance existing in a system when gas coming out from a previous section of device is directly supplied into the second section. The method has the solution that the gas coming out from the previous section is supplied into the next section of device after being pressurized. The method provided by the present invention has the advantages of high adsorption capacity, small energy consumption and little gas loss.
Description
Technical field
The method that the present invention relates to utilize transformation absorption that gas mixture is separated particularly relates to and obtains the difficult absorption of high-purity simultaneously and adsorb the method for product mutually mutually and easily.
Background technology
The phase of purify easy absorption is simultaneously adsorbed mutually with difficult from mixed air, and in these two kinds of products, easily absorption is adsorbed mutually impurity each other with difficulty.Easily absorption is relative with difficult absorption mutually mutually.From conversion gas, obtaining high-purity CO simultaneously
2In hydrogen and nitrogen gas technology, CO
2Be easily to adsorb phase, hydrogen and nitrogen gas is difficult absorption phase; And in produce CO and hydrogen and nitrogen gas technology simultaneously from water-gas, CO easily adsorbs phase, and hydrogen and nitrogen gas is difficult absorption phase, or the like.
Phase of purify easy absorption simultaneously and difficulty were adsorbed variable-pressure adsorption separating method mutually in the past, a kind of is that two essentially identical two sections adsorption tower devices are gone here and there (USP4790858) simply mutually, another kind is the direct string (CN1235862A, application number 99116508.X) mutually of two sections adsorption tower devices of band connection in series-parallel process.The common drawback of above-mentioned two kinds of methods is, the gas that comes out from last section apparatus directly enters second section, because there is resistance in system, makes the second section apparatus adsorptive pressure descend, and the adsorbents adsorb ability reduces, and plant energy consumption is higher, and gas loss is bigger than normal.
Summary of the invention
The purpose of this invention is to provide a kind of adsorption capacity that improves adsorbent, cut down the consumption of energy, the minimizing gas loss, purify easy absorption is simultaneously adsorbed the variable-pressure adsorption separating method that high-low pressure mutually sets up separately with difficulty mutually.
The present invention is achieved in that a kind of while purify easy absorption phase and difficult absorption pressure-changeable gas-adsorption separation method mutually, the method is adsorbed the PSA devices with two sections transformations, leading portion is used for purify easy absorption phase product, the last period, each tower of device comprised absorption A successively, drop pressure ED, along putting PP, easily absorption phase product gas is replaced P, vacuumize VC, boost pressure ER, the difficult absorption phase product gas FR step of finally boosting, the one section difficult absorption phase product that is used for purifying in back, each tower of back one section apparatus comprises absorption A successively, drop pressure ED, the contrary BD of putting, vacuumize VC, boost pressure ED, the difficult absorption phase product gas FR step of finally boosting, the gas that comes out the last period enters back one section apparatus after pressurization.The adsorptive pressure of two section apparatus is 0.1-10.0Mpa.Carry out in two steps along putting PP, the first step reclaims along the gas of putting, and second step is along the gas emptying of putting.The contrary BD of putting was divided into for two steps and carries out, and the contrary gas of putting of the first step reclaims, contrary gas emptying or the recovery of putting of second step.The boost gas of FR of difficult absorption phase product is used for two sections transformations absorption PSA device devices the last period and back one section apparatus, also introduces highly purified difficult absorption phase product gas in addition.Between drop pressure ED or the boost pressure ER step waiting step I is arranged.All pressing number of times is 2-6 time.The adsorption tower number is the 6-32 platform.
The present invention has improved the adsorption capacity of a back section apparatus, thereby has reached the saving energy consumption owing to adopt the gas that the last period, device came out to enter the method that second section apparatus adsorbs after pressurization, reduces the purpose of gas loss.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is the flow chart of one embodiment of the present of invention.
A is a conversion gas among the figure, and B is operation the last period, and C is that compressor boosts, and D is back one section operation, and E is a hydrogen and nitrogen gas.
The specific embodiment
The invention provides following method: a kind of while purify easy absorption phase and difficult absorption pressure-changeable gas-adsorption separation method mutually, the method is adsorbed the PSA devices with two sections transformations, leading portion is used for purify easy absorption phase product, the last period, each tower of device comprised absorption A successively, drop pressure ED, along putting PP, easily absorption phase product gas is replaced P, vacuumize VC, boost pressure ER, the difficult absorption phase product gas FR step of finally boosting, the one section difficult absorption phase product that is used for purifying in back, each tower of back one section apparatus comprises absorption A successively, drop pressure ED, the contrary BD of putting, vacuumize VC, boost pressure ED, the difficult absorption phase product gas FR step of finally boosting, the gas that comes out the last period enters back one section apparatus after pressurization.The adsorptive pressure of two section apparatus is 0.1-10.0Mpa.Carry out in two steps along putting PP, the first step reclaims along the gas of putting, and second step is along the gas emptying of putting.The contrary BD of putting was divided into for two steps and carries out, and the contrary gas of putting of the first step reclaims, contrary gas emptying or the recovery of putting of second step.The boost gas of FR of difficult absorption phase product is used for two sections transformations absorption PSA device devices the last period and back one section apparatus, also introduces highly purified difficult absorption phase product gas in addition.Between drop pressure ED or the boost pressure ER step waiting step I is arranged.All pressing number of times is 2-6 time.The adsorption tower number is the 6-32 platform.
The adsorbent that is adopted among the present invention is one or more in activated alumina, active carbon, silica gel, the zeolite molecular sieve etc.
Fig. 1 has shown one embodiment of the present of invention, is raw material with conversion gas, produces hydrogen and nitrogen gas and pure CO
2Gas.
Conversion gas volume is composed as follows:
H
2?48-52％；N
2?18-22％；CO≤1％；CH
4?1-2％；CO
2?25-28％
Temperature≤40 ℃; The last period pressure 0.6-1.1Mpa; The one section pressure 0.8-1.5Mpa in back
Load activated alumina, active carbon, three kinds of adsorbents of silica gel in the adsorption tower; Form combine adsorption successively from the bottom up.
The present embodiment result is products C O
2Purity 98.8%, yield 85%; H
2, N
2CO in the gas
2Content 900ppm, H
2Yield 99.5%, N
2Yield is 95.5%; Vacuumizing energy consumption is 26.4Kwh/KNm
3Unstripped gas is than the direct series-mounting 7.52Kwh/KNm that descended
3Unstripped gas, fall are 22%.
Claims (8)
1, a kind of while purify easy absorption phase and difficult absorption pressure-changeable gas-adsorption separation method mutually, the method is adsorbed the PSA devices with two sections transformations, leading portion is used for purify easy absorption phase product, the last period, each tower of device comprised absorption A successively, drop pressure ED, along putting PP, easily absorption phase product gas is replaced P, vacuumize VC, boost pressure ER, the difficult absorption phase product gas FR step of finally boosting, the one section difficult absorption phase product that is used for purifying in back, each tower of back one section apparatus comprises absorption A successively, drop pressure ED, the contrary BD of putting, vacuumize VC, boost pressure ED, the difficult absorption phase product gas FR step of finally boosting, it is characterized in that: the gas that comes out the last period enters back one section apparatus after pressurization.
2, while purify easy absorption phase according to claim 1 and difficult absorption pressure-changeable gas-adsorption separation method mutually, the adsorptive pressure that it is characterized in that two section apparatus is 0.1-10.0Mpa.
3, while purify easy absorption phase according to claim 1 and difficult absorption pressure-changeable gas-adsorption separation method mutually is characterized in that carrying out in two steps along putting PP, and the first step is along the gas recovery of putting, and second step is along the gas emptying of putting.
4, while according to claim 1 purify easy absorption mutually and difficult absorption pressure-changeable gas-adsorption separation method mutually is characterized in that the contrary BD of putting was divided into for two steps and carries out, and the contrary gas of putting of the first step reclaims, contrary gas emptying or the recovery of putting of second step.
5, according to claim 1,3 or 4 described while purify easy absorption phases and difficult absorption pressure-changeable gas-adsorption separation method mutually, it is characterized in that the boost gas of FR of difficult absorption phase product is used for two sections transformations absorption PSA device devices the last period and back one section apparatus, also introduces highly purified difficult absorption phase product gas in addition.
6, according to claim 1, the purify easies absorption of 3 or 4 described whiles mutually and difficult absorption mutually pressure-changeable gas-adsorption separation method, it is characterized in that between drop pressure ED or the boost pressure ER step waiting step I being arranged.
7, according to claim 1,3 or 4 described while purify easy absorption phases and difficult absorption pressure-changeable gas-adsorption separation method mutually, it is characterized in that all pressing number of times is 2-6 time.
8, according to claim 1,3 or 4 described while purify easy absorption phases and difficult absorption pressure-changeable gas-adsorption separation method mutually, it is characterized in that the adsorption tower number is the 6-32 platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011335122A CN1192813C (en) | 2001-09-28 | 2001-09-28 | Pressure swing adsorption gas separating process to purify easy-to-adsorb phase and hard-to-adsorb phase simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011335122A CN1192813C (en) | 2001-09-28 | 2001-09-28 | Pressure swing adsorption gas separating process to purify easy-to-adsorb phase and hard-to-adsorb phase simultaneously |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1357404A CN1357404A (en) | 2002-07-10 |
| CN1192813C true CN1192813C (en) | 2005-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011335122A Expired - Fee Related CN1192813C (en) | 2001-09-28 | 2001-09-28 | Pressure swing adsorption gas separating process to purify easy-to-adsorb phase and hard-to-adsorb phase simultaneously |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100372758C (en) * | 2004-06-11 | 2008-03-05 | 成都天立化工科技有限公司 | Method for oxygen enriching by improved two-stage pressure swing adsorption |
| CN100423812C (en) * | 2004-06-11 | 2008-10-08 | 成都天立化工科技有限公司 | Improved one-section variable pressure obsorbing gas separation method |
| CN100340323C (en) * | 2004-06-11 | 2007-10-03 | 成都天立化工科技有限公司 | Improved one stage pressure-varying adsorption gas separation method |
| CN100372757C (en) * | 2004-06-11 | 2008-03-05 | 成都天立化工科技有限公司 | Method for oxygen enriching by improved two stage pressure swing adsorption |
| US8756039B2 (en) * | 2010-03-02 | 2014-06-17 | Fisher-Rosemount Systems, Inc. | Rapid process model identification and generation |
-
2001
- 2001-09-28 CN CNB011335122A patent/CN1192813C/en not_active Expired - Fee Related
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| CN1357404A (en) | 2002-07-10 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Inner Mongolia Wulashan Fertilizer Co., Ltd. Assignor: Yihua Chemical Co., Ltd., Hubei Contract fulfillment period: 2009.5.4 to 2021.9.28 contract change Contract record no.: 2009420000046 Denomination of invention: Pressure swing adsorption gas separation method capable of simultaneously purifying adsorbable phase and non-adsorbable phase from mixed gas Granted publication date: 20050316 License type: Exclusive license Record date: 2009.6.15 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.5.4 TO 2021.9.28; CHANGE OF CONTRACT Name of requester: INNER MONGOLIA WULASHAN FERTILIZER CO.,LTD. Effective date: 20090615 |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050316 Termination date: 20100928 |