CN1187457A - Method for producing high-purity hydrogen - Google Patents
Method for producing high-purity hydrogen Download PDFInfo
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- CN1187457A CN1187457A CN97105007A CN97105007A CN1187457A CN 1187457 A CN1187457 A CN 1187457A CN 97105007 A CN97105007 A CN 97105007A CN 97105007 A CN97105007 A CN 97105007A CN 1187457 A CN1187457 A CN 1187457A
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- hydrogen
- purity hydrogen
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- adsorption tower
- gas
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/16—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing anhydrite, e.g. Keene's cement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Of Gases By Adsorption (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
A variable-pressure adsorption process for preparing high-purity hydrogen features that during the working period of each adsorption tower, when the high-purity hydrogen in the adsorption tower reaches P, the raw hydrogen is closed and the high-purity hydrogen is discharged to 0.7-0.9 P, and then the high-purity hydrogen is prepared conventionally. Its advantage is increasing hydrogen output by more than 3% without adding apparatus.
Description
The invention provides a kind of method of producing high-purity hydrogen, specifically utilize the transformation absorption principle to produce high-purity hydrogen (can 〉=99.999%) by raw hydrogen (＞99.00%).
Utilizing pressure swing adsorption to produce high-purity hydrogen is that one of method of ultra-pure hydrogen is produced in industry, " industrial application of hydrogen technology is made in transformation absorption " related technology of being reported as " the refining with adsorbents method of gas " and Xinan Chemical Research Inst., Ministry of Chemical Industry of Japanese Patent, special flat 4-56648 report.The technical process of the method for reporting (Fig. 1 is four tower pressure swing adsorption process process flow sheets) as shown in Figure 1 is four a tower transformations absorption silicol process, A, and B, C, four beds of D are in parallel, each bed will be an example with the A tower through seven stages:
1. absorption: under certain pressure (P), make unstripped gas pass through bed, foreign gas is adsorbed on the bed, thereby obtain high-purity hydrogen, a part is discharged as product gas, and a part makes it be raised to the pressure of product gas as the gas that boosts of another adsorption tower;
2. all press 1: after adsorption process finishes, the adsorption tower after the gas in the tower and another parsing is all pressed, after all pressing, the pressure of two towers equates, is half (1/2P) of raw gas pressure.
3. wash 1: with the gas throttling in the A tower, remove to wash the adsorption tower after another emptying, the impurity of its absorption is resolved fully;
4. emptying: the residual gas in the A tower resolves the foreign gas of absorption by the inlet end emptying, discharges a part;
5. wash 2: the gas that boosts of the adsorption tower behind another equal pressure 1 makes the impurity in the A tower obtain further desorb;
6. all press the adsorption tower after 2:A tower and another adsorption process are finished all to press, make the A tower obtain the pressure of 1/2P.
7. boost: after the A tower obtains the pressure of 1/2P, again by the product gas pressurising to product pressure P, the absorption of wait next cycle.The operational process of other three towers is similar to the A tower, because pressure equalizing has reclaimed the portion gas in the adsorption tower, makes the rate of recovery reach 75%～80%.Because of this method rate of recovery is lower, make its application be subjected to bigger restriction.
Purpose of the present invention improves to have now utilizes pressure swing adsorption process to produce the rate of recovery of high-purity hydrogen.
High-purity hydrogen preparation method of the present invention still utilizes existing pressure swing adsorption process to produce the equipment of high-purity hydrogen, but adopts different technical process (being working method), improves the rate of recovery that original equipment is produced high-purity hydrogen.The technical process of known transformation absorption silicol process is at each adsorption tower after (1/4 cycle) make High Purity Hydrogen in the adsorption tower reach P in the working hour, gas in the tower and another adsorption tower are all pressed (each 50%P), and its remaining gas (50%P) is used to wash another adsorption tower and the parsing of self.The about 50%P of the hydrogen of every like this tower emptying, the rate of recovery of hydrogen is lower.The present invention has improved this traditional method, wash other adsorption tower and self resolve under the condition of desired gas at specification of quality that guarantees the high-purity hydrogen of producing and satisfied being used to, at first the part high-purity hydrogen in the adsorption tower is discharged as product, repeat the common High Purity Hydrogen processing method of producing again, thereby improve the rate of recovery of equipment.The present invention draws from a large amount of experiments when the gas of the adsorption tower that washes other and self parsing remains on 0.35～0.45P part of high-purity hydrogen in the initial adsorption tower, can satisfy the flushing and the parsing (reactivating) of adsorption tower.Therefore, the high-purity hydrogen that obtains in the initial adsorption tower at first can be discharged 0.1～0.3P, operate by common method again.Method of the present invention is because more former processing method is discharged 0.1～0.3P part high-purity hydrogen earlier, so the total yield of equipment can carry 3～6%.Specifically the employing pressure swing adsorption process of an invention is produced the method for high-purity hydrogen, it is characterized in that making the high-purity hydrogen in the adsorption tower reach P in the working hour at each adsorption tower, close raw hydrogen, finish by ordinary process again behind discharging high-purity hydrogen to 0.7～0.9P and produce high-purity hydrogen.The technical process of the inventive method still can be represented by Fig. 1.V among the figure
1, V
2, V
3, V
4Be system control valve, P
1Be the system pressure table, Pa is the tensimeter of absorption tower A, and Av1～5 are the control valve of absorption tower A, equally for absorption tower B, and C, D is corresponding to be furnished with Bv1～5, Cv1～5, Dv1～5 valves and Pb, Pc and Pd tensimeter.V
1Be raw hydrogen inlet, V
2Be the product hydrogen outlet.
Below by embodiment technology of the present invention is given to illustrate further
Utilize the 20NM of known BOCDEPLLE development
3/ H high-purity hydrogen treating plant adopts method of the present invention, uses 25NM
3The common hydrogen of/H is unstripped gas, produces 20.8NM to occur
3The high-purity hydrogen of/H, its hydrogen yield can reach 83.33%.
Concrete implementation method is as follows: after adsorption process is carried out, stop logical raw hydrogen in adsorption tower, the hydrogen in the tower is got rid of to 0.8P all pressed with another adsorber.Other process is identical with aforementioned second operation.
The technical indicator of equipment is as follows: raw hydrogen:＞=99.2%
Wherein: O
2:＜=2000PPM
N
2：＜＝2000PPM
H
2O: normal temperature saturation water
Total carbon:＜=1000PPM
Pressure: 1.0～1.5MPA
Purify back hydrogen:＞=99.999%
Wherein: O
2:＜=1.0PPM
N
2：＜＝1.0PPM
H
2O：＜＝1.0PPM
TCH：＜＝3.0PPM
CO：＜＝1.0PPM
CO
2：＜＝1.0PPM
Pressure: 0.8～1.0MPA
Comparative example 1 ordinary skill system high-purity hydrogen
Utilize the equipment of example 1, adopt the common technical process method of producing hydrogen, its rate of recovery has only 79.92%.
By the foregoing description and comparative example as can be known, under the condition that does not increase equipment, use the present invention, can make the gas production rate of hydrogen psa treating plant increase more than 3%, with regard to 20NM
3/ H hydrogen cleaning equipment can reclaim 5940 every year more
3High-purity hydrogen will produce than remarkable economic efficiency.
Claims (1)
1. method that adopts pressure swing adsorption process to produce high-purity hydrogen, it is characterized in that making the high-purity hydrogen in the adsorption tower reach P in the working hour at each adsorption tower, close raw hydrogen, finish by ordinary process again behind discharging high-purity hydrogen to 0.7～0.9P and produce high-purity hydrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105007A CN1088443C (en) | 1997-01-09 | 1997-01-09 | Method for producing high-purity hydrogen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97105007A CN1088443C (en) | 1997-01-09 | 1997-01-09 | Method for producing high-purity hydrogen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1187457A true CN1187457A (en) | 1998-07-15 |
| CN1088443C CN1088443C (en) | 2002-07-31 |
Family
ID=5167569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97105007A Expired - Fee Related CN1088443C (en) | 1997-01-09 | 1997-01-09 | Method for producing high-purity hydrogen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1088443C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109499261A (en) * | 2018-12-03 | 2019-03-22 | 四川天科技股份有限公司 | The removing system and method for CO in a kind of used in proton exchange membrane fuel cell hydrogen |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2076454A1 (en) * | 1991-08-27 | 1993-02-28 | Wilbur C. Kratz | Pressure swing adsorption for hydrogen with high productivity |
| DE4210638A1 (en) * | 1991-09-12 | 1993-03-18 | Linde Ag | High purity hydrogen and carbon mon:oxide recovery from dry gas mixt. - by one stage partial condensation and purificn. giving high yield at reduced cost |
| CN1025110C (en) * | 1992-09-24 | 1994-06-22 | 中国石油化工总公司 | Pressure-changed adsorption concentrating hydrogen technology |
-
1997
- 1997-01-09 CN CN97105007A patent/CN1088443C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109499261A (en) * | 2018-12-03 | 2019-03-22 | 四川天科技股份有限公司 | The removing system and method for CO in a kind of used in proton exchange membrane fuel cell hydrogen |
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| Publication number | Publication date |
|---|---|
| CN1088443C (en) | 2002-07-31 |
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