CN103395744B - Rapid hydrogen extraction driving method for pressure swing adsorption hydrogen production system - Google Patents
Rapid hydrogen extraction driving method for pressure swing adsorption hydrogen production system Download PDFInfo
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- CN103395744B CN103395744B CN201310328743.7A CN201310328743A CN103395744B CN 103395744 B CN103395744 B CN 103395744B CN 201310328743 A CN201310328743 A CN 201310328743A CN 103395744 B CN103395744 B CN 103395744B
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Abstract
The invention relates to a rapid hydrogen extraction driving method for a pressure swing adsorption hydrogen production system and aims to solve the problem of long driving time and environment pollution of the traditional pressure swing adsorption hydrogen production system. The method comprises the following steps that: when the pressure swing adsorption hydrogen production system drives, nitrogen is introduced from an inlet of a desulfurization device of the pressure swing adsorption hydrogen production system firstly to clean and replace the air in the system, and then, the air is exhausted from an outlet of a hydrogen purification device, wherein the nitrogen is stopped from being introduced when the oxygen content of the system is reduced to below 0.4% in volume percentage; and then, the hydrogen is introduced from the outlet of the hydrogen purification device of the pressure swing adsorption hydrogen production system to reversely clean and replace the nitrogen in the system, then, the nitrogen is exhausted from the inlet of the desulfurization device or introduced to a gas pipe network through an analytic air outlet of a temperature swing adsorption device, and the pressure swing adsorption hydrogen production system can normally feed and drive after the nitrogen replacement in the system is finished. The method provided by the invention is simple, capable of greatly shortening the driving time and friendly to the environment.
Description
Technical field
The present invention relates to a kind of starting method of pressure swing adsorption hydrogen production system, specifically a kind of Quick hydrogen starting method of pressure swing adsorption hydrogen production system.
Background technology
Pressure swing adsorption hydrogen production system generally comprises and connects desulfurizer, gas compressor (at least comprising two sections), temperature swing absorption unit, pressure-swing absorption apparatus and hydrogen purification device successively.During work, the advanced desulfurizer desulfurization of unstripped gas, after gas compressor one section compression, send into temperature swing absorption unit again carry out Temp .-changing adsorption except de-benzene and naphthalene, return and deliver to pressure-swing absorption apparatus after gas compressor compresses further and isolate hydrogen and resolution gas, go out and can enter follow-up hydrogen-holder after the hydrogen feeding hydrogen purification device gone out is purified further, resolution gas sends into temperature swing absorption unit for entering gas ductwork after its regeneration, and the sewage of generation send Sewage treatment systems (see Fig. 4).
Routine preventive maintenance to be needed according to running condition after pressure swing adsorption hydrogen production system cloud gray model for some time, start-of-run is again carried out again after maintenance, pressure swing adsorption hydrogen production system is before normal input unstripped gas of driving, must replace the air in the e-quipment and pipe of whole system with nitrogen, oxygen level is declined, because drop in native system unstripped gas, gas product and resolution gas are all containing a large amount of inflammable and explosive gas, such as hydrogen, carbon monoxide, methane and hydrocarbon etc., if in advance the air displacement containing aerobic in device is not fallen, so easily set off an explosion when driving burning.
When traditional technology is driven, first with pure nitrogen gas, pressure swing adsorption hydrogen production system (abbreviation hydrogen generating system) inside is cleaned, the desulfurizer of nitrogen by hydrogen generating system is passed into, discharged complete for the air displacement in hydrogen generating system by hydrogen purification device, whole system oxygen level≤0.4%(volume percent) time be qualified after, start unstripped gas production equipment, hydrogen generating system start-of-run, the mainly temperature and pressure red-tape operati of pressure swing adsorption hydrogen production technique, but the initial stage of driving, thus operating pressure (particularly adsorption tower) can not be set up owing to being full of nitrogen in system, after unstripped gas arrives adsorption tower, because the service pressure of system is not set up, hydrogen in unstripped gas cannot be separated, after having to pass through for some time operation, along with pressure is slowly stablized, in the gas product produced, density of hydrogen progressively improves, sorbent material starts progressively to regenerate, even so, the gas product now produced still does not reach the purity requirement of user, necessary constantly emptying, until hydrogen purity reaches 99.999%, just calculate driving to complete, this traditional starting method needs 10 ~ 15 hours by being dosed into the qualified hydrogen output time, not only expend the longer time, also can discharge a large amount of obnoxious flavoures in air, contaminate environment and wasting energy.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, provide a kind of method simple, can the starting method of significantly restart up, environment amenable pressure swing adsorption hydrogen production system.
Described starting method is: when pressure swing adsorption hydrogen production system is driven, first the desulfurizer entrance of nitrogen by pressure swing adsorption hydrogen production system is passed into, to clean the air in exchange system, make it be exported by hydrogen purification device to discharge, when system oxygen level is down to volume percent less than 0.4%, stop passing into nitrogen; The hydrogen purification device outlet of then being united by pressure swing adsorption hydrogen production by hydrogen passes into, with the reverse nitrogen washed down in exchange system, make it be discharged by desulfurizer entrance or exported by the resolution gas of temperature swing absorption unit to enter gas ductwork, after nitrogen replacement in completion system, the normal start-of-run of pressure swing adsorption hydrogen production system.
After nitrogen in system is all replaced, continue to be exported by hydrogen purification device to pass into hydrogen, by adsorption tower working pressure process curve, hydrogen and boosting or reduced pressure operation, the then normal start-of-run of pressure swing adsorption hydrogen production system are filled to each adsorption tower in pressure swing adsorption hydrogen production system.
Described hydrogen from hydrogen in the network of pressure swing adsorption hydrogen production systems connection, or the hydrogen stored in the hydrogen-holder be connected with pressure swing adsorption hydrogen production system.The pressure of this kind of hydrogen is generally 1-2Mpa
When described adsorption tower working pressure process curve refers to and normally works, the boosting of filling hydrogen of each adsorption tower or the operating process pressure of step-down, this is prior art, is not described further.
Feeding intake in described normal start-of-run refers to input unstripped gas, coke-oven gas, Sweet natural gas or other hydrogen-containing gas that described unstripped gas can be produced for pit kiln.
Contriver is studied traditional starting method, find to cause the major cause of driving overlong time to be full of nitrogen in system after carrying out nitrogen purging, this nitrogen is security personnel's nitrogen of low pressure, thus cannot build-up pressure, cause being difficult in the short period of time sharp separation and go out hydrogen and the not high problem of isolated hydrogen purity.By the hydrogen that introducing reverse after nitrogen purging is pure, nitrogen purge is replaced away, then continuing to be filled with hydrogen makes each adsorption tower boost by tower working pressure process curve rapid hydrogen charging, to meet working pressure during pressure swing adsorption hydrogen production system worked well, like this after unstripped gas feeds intake and enters, just without the need to just qualified purified hydrogen can be produced after pressure foundation by the time, but qualified gas product can be produced fast.
Beneficial effect:
Present invention process is simple, substantially reduce the driving time of pressure swing adsorption hydrogen production system, improve working efficiency, 0.5 hour was shortened to by original 12 hours ~ 15 hours by being dosed into the qualified hydrogen output time, further increase qualified hydrogen output, the gas produced after start-of-run all can effectively utilize, in line without obnoxious flavour, energy-conserving and environment-protective, have very large social benefit.
Accompanying drawing explanation
Fig. 1 is the schema of Quick hydrogen starting method of the present invention.
When Fig. 2 is for driving, adopt the gas schema one during hydrogen exchange nitrogen.
When Fig. 3 is for driving, adopt gas flowchart 2 during hydrogen exchange nitrogen.
Fig. 4 is after normal start-of-run, the schema of pressure swing adsorption hydrogen production system.
Wherein, 1-desulfurizer, 2-100# gas compressor, 3-200# temperature swing absorption unit, 4-gas ductwork, 5-waste disposal plant, 6-300# pressure-swing absorption apparatus, 7-400# hydrogen purification device, 8-hydrogen-holder.
Embodiment
For the pressure swing adsorption hydrogen production system of subsidiary factory of Wuhan iron and steel (group) silicon steel division department two, explanation is further explained to the inventive method:
In the present embodiment, unstripped gas is coke-oven gas.
With reference to Fig. 3, in the present embodiment, the pressure swing adsorption hydrogen production flow process of pressure swing adsorption hydrogen production system as shown in Figure 3, coke-oven gas (COG) is introduced into desulfurizer 1, then send into 200# temperature swing absorption unit 3 through one section of 100# gas compressor 2 compression and carry out Temp .-changing adsorption to adsorb benzene in coal gas and naphthalene, coke-oven gas after Temp .-changing adsorption is recycled to two sections of 100# gas compressor 2 and compresses further, coke-oven gas after the compression out of 100# gas compressor 2 end is sent into 300# pressure-swing absorption apparatus 6(the present embodiment through pipeline and is comprised 5 adsorption tower A towers, B tower, C tower, D tower, E tower) carry out pressure-variable adsorption and isolate hydrogen and resolution gas, the parsing produced sends into 200# temperature swing absorption unit 3 to after its regeneration, resolution gas sends into gas ductwork 4, the sewage produced sends into waste disposal plant 5, isolated hydrogen is sent into 400# hydrogen purification device 7 and is purified further, qualified hydrogen product is produced after purification, described qualified hydrogen product can be sent into hydrogen spherical tank 8 and store, or send into downstream user or hydrogen pipe network through hydrogen-holder 8.
With reference to Fig. 1 and Fig. 2, when needs carry out parking maintenance to pressure swing adsorption hydrogen production system, first stop feeding intake, then nitrogen is passed into, the gas inlet purging this device of desulfurizer 1(is successively equivalent to the entrance of pressure swing adsorption hydrogen production system), the pneumatic outlet of 100# gas compressor 2,200# temperature swing absorption unit 3,300# pressure-swing absorption apparatus 6 and this device of hydrogen purification device 7(is equivalent to the outlet of pressure swing adsorption hydrogen production system), by hydrogen exchange out, normal service can be carried out to system after having replaced.
When maintenance completes, when needing to drive, first pass into nitrogen, purge desulfurizer 1,100# gas compressor 2,200# temperature swing absorption unit 3,300# pressure-swing absorption apparatus 6 and hydrogen purification device 7 successively, by intrasystem air displacement out, when system oxygen level is down to 0.4%(volume percent) below time, stop pass into nitrogen; Then by hydrogen-holder 8(or by hydrogen pipe network through hydrogen-holder 8) reverse extraction hydrogen, purge hydrogen purification device 7,300# pressure-swing absorption apparatus 6,200# temperature swing absorption unit 3,100# gas compressor 2 and desulfurizer 1 successively, with the reverse nitrogen washed down in exchange system, until nitrogen is all replaced (see Fig. 2) in system; Or purge hydrogen purification device 7,300# pressure-swing absorption apparatus 6,200# temperature swing absorption unit 3 successively, finally exported by the resolution gas of 200# temperature swing absorption unit 3 and enter gas ductwork 4 to reclaim high concentration hydrogen (because in desulfurizer 1,100# gas compressor 2, gas volume is little, pressure is low, do not pass into hydrogen purge and affect the driving time hardly yet), until nitrogen is replaced (see Fig. 3) by major part in system.When after the nitrogen replacement in completion system, 5 adsorption towers again through hydrogen purification device 7 pairs of 300# pressure-swing absorption apparatuss 6 fill hydrogen boost operations according to adsorption tower working pressure process curve, after the working pressure of each adsorption tower meets described pressure process curve, open unstripped gas (coke-oven gas) inlet valve, in desulfurizer 1, drop into the normal start-of-run of coke-oven gas.After start-of-run, the gas of initial production can enter gas ductwork 4, for downstream coal gas user, no longer to airborne release.
The inventive method saves time as shown in table 1 compared with former method.
Table 1 unit: hour
The inventive method, compared with former method, has saved 9.5 hours, and wherein the inventive method is 0.5 hour by start-of-run to the qualified hydrogen output time.The qualified index of described hydrogen is oxygen level≤2PPm, dew point≤-60 DEG C, and purity is 99.999%(volume percent).
Claims (2)
1. the Quick hydrogen starting method of a pressure swing adsorption hydrogen production system, when pressure swing adsorption hydrogen production system is driven, first the desulfurizer entrance of nitrogen by pressure swing adsorption hydrogen production system is passed into, to clean the air in exchange system, make it be exported by hydrogen purification device to discharge, it is characterized in that, when system oxygen level is down to volume percent less than 0.4%, stop passing into nitrogen; The hydrogen purification device outlet of then being united by pressure swing adsorption hydrogen production by hydrogen passes into, with the reverse nitrogen washed down in exchange system, make it be discharged by desulfurizer entrance or exported by the resolution gas of temperature swing absorption unit to enter gas ductwork, after nitrogen in system is all replaced, continue to be exported by hydrogen purification device to pass into hydrogen, by adsorption tower working pressure process curve, hydrogen and boosting or reduced pressure operation, the then normal start-of-run of pressure swing adsorption hydrogen production system are filled to each adsorption tower in pressure swing adsorption hydrogen production system.
2. the Quick hydrogen starting method of pressure swing adsorption hydrogen production system as claimed in claim 1, it is characterized in that, described hydrogen from hydrogen in the network of pressure swing adsorption hydrogen production systems connection, or the hydrogen stored in the hydrogen-holder be connected with pressure swing adsorption hydrogen production system.
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| CN201310328743.7A CN103395744B (en) | 2013-07-31 | 2013-07-31 | Rapid hydrogen extraction driving method for pressure swing adsorption hydrogen production system |
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| CN103395744B true CN103395744B (en) | 2015-01-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104803356B (en) * | 2014-01-27 | 2017-01-04 | 上海华林工业气体有限公司 | Starting method and system for HyCO factory Pressure Swing Adsorption hydrogen technique |
| CN106943837A (en) * | 2017-04-19 | 2017-07-14 | 苏州市兴鲁空分设备科技发展有限公司 | Decarburization deamination system |
| CN107946615A (en) * | 2017-12-11 | 2018-04-20 | 新源动力股份有限公司 | A kind of method and hydrogen-feeding system of fuel cell car hydrogen supply |
| CN113304581B (en) * | 2021-07-28 | 2021-11-26 | 山东神驰石化有限公司 | Novel PSA adsorption separation device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300712A (en) * | 1999-12-22 | 2001-06-27 | 巴陵石化鹰山石油化工厂 | Process for pretransforming hydrocarbon vapour and its application |
| US20100287981A1 (en) * | 2009-05-18 | 2010-11-18 | American Air Liquide, Inc. | Processes For The Recovery Of High Purity Hydrogen And High Purity Carbon Dioxide |
| CN102296321A (en) * | 2011-08-29 | 2011-12-28 | 中国恩菲工程技术有限公司 | Electrolytic hydrogen production process during production of polysilicon and oxygen recovery system thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300712A (en) * | 1999-12-22 | 2001-06-27 | 巴陵石化鹰山石油化工厂 | Process for pretransforming hydrocarbon vapour and its application |
| US20100287981A1 (en) * | 2009-05-18 | 2010-11-18 | American Air Liquide, Inc. | Processes For The Recovery Of High Purity Hydrogen And High Purity Carbon Dioxide |
| CN102296321A (en) * | 2011-08-29 | 2011-12-28 | 中国恩菲工程技术有限公司 | Electrolytic hydrogen production process during production of polysilicon and oxygen recovery system thereof |
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Effective date of registration: 20170724 Address after: 430083, Hubei Wuhan Qingshan District Factory No. 2 Gate joint stock company organs Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |
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