CN104692326A - Hydrogen recycling method - Google Patents
Hydrogen recycling method Download PDFInfo
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- CN104692326A CN104692326A CN201510128384.XA CN201510128384A CN104692326A CN 104692326 A CN104692326 A CN 104692326A CN 201510128384 A CN201510128384 A CN 201510128384A CN 104692326 A CN104692326 A CN 104692326A
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Abstract
The invention relates to a hydrogen recycling method. The method includes the steps that 1, released gas generated through methanol synthesis is led into a methanol cleaning tower; 2, the methanol in the released gas is cleaned and removed through desalted water sprayed out of the top of the methanol tower, feed gas enters a heater after liquid drops are separated off through a gas-liquid separator, then the heater is preheated to 45 degrees to 50 degrees, and then the feed gas generated after water washing, gas-liquid separation and preheating is led into a membrane separator; 3, the permeable gas separated through the membrane separator is the recycled hydrogen; 4, the recycled hydrogen is sent to an inlet of a synthesis gas compressor to be pressed together with the fresh air and then returns to a methanol synthesis device to be recycled, and hydrogen recycling is finished. According to the hydrogen recycling method, the adopted membrane separation equipment is less, the occupied space is less, investment is saved, the impermeable gas generated after rich hydrogen is recycled is higher in pressure, and the residual fuel gas can be used for other devices after decompression is conducted.
Description
Technical field
The present invention relates to hydrogen retrieval Application way.
Background technology
Periodic off-gases due to methanol-fueled CLC is a kind of very clean gas, containing higher hydrogen component, if as fuel, calorific value is lower, and hydrogen carbon resource is not utilized effectively, consuming for reducing raw material Jiao, alleviating conversion and low-temperature rectisol decarburization load, hydrogen retrieval being carried out to periodic off-gases and is necessary.
Existing, hydrogen retrieval method to discharge the hydrogen containing solid impurity and gaseous impurities, through strainer except most of solid impurity, enter eluting column water and remove gaseous impurities, ammonia, enter cooling system and carry out thermal exchange, the dew point of hydrogen by when coming out of the stove 43 ~ 47 DEG C drop to 15 DEG C, hydrogen removes the moisture content of about 90% in lessivation and process of cooling.Moisture content is separated by steam separator.In hydrogen, remaining moisture content enters drying tower, after silica gel and molecular sieve adsorption, reaches the dew point of needs.Finally the hydrogen recycle after purification is used.
At present, the pressure-variable adsorption hydrogen retrieval technique of employing, it takes up an area greatly, it is high to invest, although its hydrogen retrieval rate is high, reclaims the tail gas pressure after rich hydrogen lower, is difficult to return fuel gas pipe network.
Summary of the invention
The present invention is to solve above-mentioned Problems existing, and provides hydrogen retrieval Application way.
Hydrogen retrieval Application way of the present invention, it carries out according to following steps:
One, pressure be 8.07MPa, temperature is 40 DEG C, air-flow is 17175.9Nm
3under the condition of/h, by the periodic off-gases from methanol-fueled CLC, import and wash in methanol column;
Two, the methyl alcohol in the de-salted water eccysis periodic off-gases drenched by methanol column top spray, then fall after drop through gas-liquid separator separates, enter well heater, then well heater is preheating to 45 ~ 50 DEG C, then the unstripped gas after washing, gas-liquid separation and thermal pretreatment is imported to membrane separation apparatus;
Three, the infiltration gas after membrane separation apparatus is separated, is the hydrogen of recovery;
Four, the hydrogen of recovery is sent to synthesic gas compressor entrance, after pressurizeing together with fresh air, returns methanol synthesizer and recycle, namely complete described hydrogen retrieval and utilize.
The present invention comprises following beneficial effect:
The present invention utilizes film to reclaim component characteristic, selective recovery available gas hydrogen, reduces and consumes.
During the normal running of this device, periodic off-gases, after washing and recycling methyl alcohol, delivers to methanol-fueled CLC flash drum washing flash steam containing alcohol water.Hydrogen retrieval tail gas is sent out-of-bounds as fuel gas.
The present invention adopt membrane separation plant few, take up an area little, reduced investment, reclaim the impermeable gas pressure after rich hydrogen higher, residual fuel gas decompression after can be used for other device to use.
Embodiment
Embodiment one: the hydrogen retrieval Application way of present embodiment, it carries out according to following steps:
One, pressure be 8.07MPa, temperature is 40 DEG C, air-flow is 17175.9Nm
3under the condition of/h, by the periodic off-gases from methanol-fueled CLC, import and wash in methanol column;
Two, the methyl alcohol in the de-salted water eccysis periodic off-gases drenched by methanol column top spray, then fall after drop through gas-liquid separator separates, enter well heater, then well heater is preheating to 45 ~ 50 DEG C, then the unstripped gas after washing, gas-liquid separation and thermal pretreatment is imported to membrane separation apparatus;
Three, the infiltration gas after membrane separation apparatus is separated, is the hydrogen of recovery;
Four, the hydrogen of recovery is sent to synthesic gas compressor entrance, after pressurizeing together with fresh air, returns methanol synthesizer and recycle, namely complete described hydrogen retrieval and utilize.
Embodiment two: present embodiment and embodiment one unlike: described methanol column model is E62001.Other is identical with embodiment one.
Embodiment three: present embodiment and embodiment one unlike: described gas-liquid separator model is F62002.Other is identical with embodiment one.
Embodiment four: present embodiment and embodiment one unlike: described well heater model is C62001.Other is identical with embodiment one.
Embodiment five: present embodiment and embodiment one unlike: described membrane separation apparatus model is Y62001 ~ 07.Other is identical with embodiment one.
Embodiment six: present embodiment and embodiment one unlike: in step 3, the tail gas of hydrogen recovery reduces to 0.45MPa by variable valve and is sent to fuel gas pipe network as fuel.Other is identical with embodiment one.
Content of the present invention is not limited only to the content of the respective embodiments described above, and the combination of one of them or several embodiment equally also can realize the object of inventing.
Beneficial effect of the present invention is verified by following examples:
The hydrogen retrieval Application way of the present embodiment, carries out according to following steps:
One, pressure be 8.07MPa, temperature is 40 DEG C, air-flow is 17175.9Nm
3under the condition of/h, by the periodic off-gases from methanol-fueled CLC, import and wash in methanol column;
Two, the methyl alcohol in the de-salted water eccysis periodic off-gases drenched by methanol column top spray, then fall after drop through gas-liquid separator separates, enter well heater, then well heater is preheating to 45 ~ 50 DEG C, then the unstripped gas after washing, gas-liquid separation and thermal pretreatment is imported to membrane separation apparatus;
Three, the infiltration gas after membrane separation apparatus is separated, is the hydrogen of recovery;
Four, the hydrogen of recovery is sent to synthesic gas compressor entrance, after pressurizeing together with fresh air, returns methanol synthesizer and recycle, namely complete described hydrogen retrieval and utilize.
The raw material consumption of the present embodiment and quota as shown in table 1, power consumption and quota as shown in table 2, raw material technical specification is as shown in table 3.
Table 1 raw material consumption quota and consumption
Table 2 power (water, point, vapour, the gas) norm quota of consumption and consumption
Table 3 raw material technical specification
The hydrogen retrieval data of the present embodiment are shown in Table 4, and three wastes discharge amount is shown in Table 5, and from table 4 and 5, the method for the present embodiment, hydrogen retrieval rate is higher, and effectively can solve the problem of three waste discharge.
Table 4 product specification
Table 5 three wastes discharge amount
Claims (6)
1. hydrogen retrieval Application way, is characterized in that it carries out according to following steps:
One, pressure be 8.07MPa, temperature is 40 DEG C, air-flow is 17175.9Nm
3under the condition of/h, by the periodic off-gases from methanol-fueled CLC, import and wash in methanol column;
Two, the methyl alcohol in the de-salted water eccysis periodic off-gases drenched by methanol column top spray, then fall after drop through gas-liquid separator separates, enter well heater, then well heater is preheating to 45 ~ 50 DEG C, then the unstripped gas after washing, gas-liquid separation and thermal pretreatment is imported to membrane separation apparatus;
Three, the infiltration gas after membrane separation apparatus is separated, is the hydrogen of recovery;
Four, the hydrogen of recovery is sent to synthesic gas compressor entrance, after pressurizeing together with fresh air, returns methanol synthesizer and recycle, namely complete described hydrogen retrieval and utilize.
2. hydrogen retrieval Application way according to claim 1, is characterized in that described methanol column model is E62001.
3. hydrogen retrieval Application way according to claim 1, is characterized in that described gas-liquid separator model is F62002.
4. hydrogen retrieval Application way according to claim 1, is characterized in that described well heater model is C62001.
5. hydrogen retrieval Application way according to claim 1, is characterized in that described membrane separation apparatus model is Y62001 ~ 07.
6. hydrogen retrieval Application way according to claim 1, is characterized in that the tail gas of hydrogen recovery in step 3 reduces to 0.45MPa by variable valve and is sent to fuel gas pipe network as fuel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510128384.XA CN104692326A (en) | 2015-03-23 | 2015-03-23 | Hydrogen recycling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510128384.XA CN104692326A (en) | 2015-03-23 | 2015-03-23 | Hydrogen recycling method |
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| CN104692326A true CN104692326A (en) | 2015-06-10 |
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| CN201510128384.XA Pending CN104692326A (en) | 2015-03-23 | 2015-03-23 | Hydrogen recycling method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105237348A (en) * | 2015-09-21 | 2016-01-13 | 七台河宝泰隆煤化工股份有限公司 | Method for methanol removal and hydrogen recovery of exhausted gas |
| CN105585425A (en) * | 2015-12-30 | 2016-05-18 | 七台河宝泰隆煤化工股份有限公司 | Hydrogen recycling device |
| CN113292047A (en) * | 2021-06-16 | 2021-08-24 | 河南能源化工集团鹤壁煤化工有限公司 | Methanol synthesis hydrogen recovery system |
| CN115253583A (en) * | 2022-06-30 | 2022-11-01 | 中盐金坛盐化有限责任公司 | System for salt cavern stores high-purity hydrogen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580490A (en) * | 2012-01-16 | 2012-07-18 | 重庆市万利来化工股份有限公司 | Methanol purge gas recycling process |
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2015
- 2015-03-23 CN CN201510128384.XA patent/CN104692326A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580490A (en) * | 2012-01-16 | 2012-07-18 | 重庆市万利来化工股份有限公司 | Methanol purge gas recycling process |
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| RINCHY12345: "氢回收操作手册", 《WWW.DOCIN.COMP-511357615.HTML》 * |
| 上海市经济团体联合会等: "《节能减排工程技术与应用案例》", 31 May 2010, 华东理工大学出版社 * |
| 吴昌祥: "气体膜分离技术在甲醇生产中的应用", 《煤化工》 * |
| 夏春江: "气体膜分离技术在甲醇生产中的应用", 《贵州化工》 * |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105237348A (en) * | 2015-09-21 | 2016-01-13 | 七台河宝泰隆煤化工股份有限公司 | Method for methanol removal and hydrogen recovery of exhausted gas |
| CN105585425A (en) * | 2015-12-30 | 2016-05-18 | 七台河宝泰隆煤化工股份有限公司 | Hydrogen recycling device |
| CN113292047A (en) * | 2021-06-16 | 2021-08-24 | 河南能源化工集团鹤壁煤化工有限公司 | Methanol synthesis hydrogen recovery system |
| CN115253583A (en) * | 2022-06-30 | 2022-11-01 | 中盐金坛盐化有限责任公司 | System for salt cavern stores high-purity hydrogen |
| CN115253583B (en) * | 2022-06-30 | 2023-05-02 | 中盐金坛盐化有限责任公司 | System for salt cavern stores high purity hydrogen |
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Application publication date: 20150610 |