CN102344119A - Method for automatically switching a plurality of towers in pressure swing adsorption (PSA) hydrogen production system - Google Patents
Method for automatically switching a plurality of towers in pressure swing adsorption (PSA) hydrogen production system Download PDFInfo
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- CN102344119A CN102344119A CN2011101706668A CN201110170666A CN102344119A CN 102344119 A CN102344119 A CN 102344119A CN 2011101706668 A CN2011101706668 A CN 2011101706668A CN 201110170666 A CN201110170666 A CN 201110170666A CN 102344119 A CN102344119 A CN 102344119A
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Abstract
The invention provides a method for automatically switching a plurality of towers in a pressure swing adsorption (PSA) hydrogen production system. The method comprises the following steps: when the PSA hydrogen production system is operated under an initial operation mode, determining whether a tower has a fault according to the information of a program control valve of the tower; if at least one of the plurality of towers has a fault, then automatically switching the PSA hydrogen production system into another operation mode at a proper time according to pre-stored time parameters, and not operating the at least one tower having a fault under the other operation mode. According to the method provided by the invention, the switching among various operation modes during a hydrogen production process can be exactly controlled and the adsorption tower can be switched to other feasible operation modes in a fault condition, so that the fault outage rate of the PSA hydrogen production system is reduced and the production continuity is ensured.
Description
Technical field
The present invention relates to the automatic switching method of the multitower in a kind of transformation absorption (PSA) hydrogen generating system; Specifically; Relate to a kind of like this method: utilizing PSA from coke-oven gas, to extract in the process of hydrogen; If the particular column in the multitower breaks down, then PSA hydrogen generating system control the carrying out automatic switchover of multitower.
Background technology
Hydrogen is indispensable raw material and shielding gas in the production process, and is along with socioeconomic fast development and the people enhancing to environmental consciousness, also increasing to the demand of hydrogen energy source.Rise steadily under the new situation in the hydrogen feedstock price, for reducing the hydrogen cost, strengthen the market competitiveness, the investigator is doing number of research projects aspect hydrogen production process and the purification both at home and abroad.In these 4 kinds of hydrogen manufacturing patterns of chemical hydrogen manufacturing, water electrolysis hydrogen production, biological hydrogen production and PSA hydrogen manufacturing, characteristics such as PSA hydrogen manufacturing is simple because of its technical process, product purity is high, scale changes flexibly and production cost is low become the first-selection of current hydrogen manufacturing mode.Present both at home and abroad general 4 towers, 5 towers, 6 tower operation scheme of adopting of the PSA hydrogen generating system of operation, 6 tower operation scheme are general accomplishes the switching of 6 towers to 5 towers, 6 towers to 4 towers, and the product purity of production is generally 99.9%.
Yet when a certain tower in 6 towers broke down, how to automatically switch between multitower according to the fault that occurs was the problem that needs solve.Therefore, need a kind of multitower automatic switching method that is used for PSA hydrogen manufacturing.
Summary of the invention
According to exemplary embodiment of the present invention; The automatic switching method of the multitower in a kind of transformation absorption hydrogen generating system is provided; It is characterized in that; Said method comprising the steps of: when transformation absorption hydrogen generating system moves, confirm according to the information of the sequencing valve of each tower whether this tower exists fault under the initial launch pattern; There is fault if confirm at least one tower in the said multitower; Then in the suitable time transformation is adsorbed hydrogen generating system and automatically switch to another operational mode according to the time parameter of storing in advance; Under said another operational mode, do not move said at least one tower that has fault.
Information according to the sequencing valve of each tower confirms whether this tower exists the step of fault to comprise: when opening the sequencing valve of this tower, confirm whether to receive in the given time the valve body that the said sequencing valve of indication reaches the position and open limit signal; Open limit signal if receive valve body in the given time, confirm that then there is not fault in said this tower; Do not open limit signal if receive valve body in the given time, confirm that then there is fault in said this tower.
Information according to the sequencing valve of each tower confirms whether this tower exists the step of fault to comprise: when closing the sequencing valve of this tower, then confirm whether to receive in the given time the said sequencing valve of indication and close the valve body that puts in place and close limit signal; Close limit signal if receive valve body in the given time, confirm that then there is not fault in said this tower; Do not close limit signal if receive valve body in the given time, confirm that then there is fault in said this tower.
Said method also can comprise: if the fault of said at least one tower is excluded, then transformation is adsorbed hydrogen generating system and automatically switch to said initial launch pattern from said another operational mode.
Said multitower can be 6 towers, and said initial launch pattern can be the 6-2-3/P operational mode.
Can confirm said another operational mode according to the quantity of at least one tower that has fault.
If having the quantity of at least one tower of fault is 1, then said another operational mode can be the operational mode of 5 towers operation or the operational mode of 4 towers operation.
If having the quantity of at least one tower of fault is 2, then said another operational mode can be the operational mode of 4 towers operation.
The operational mode of 5 towers operation can be the 5-2-2/P operational mode.
The operational mode of 4 towers operation can be the 4-1-2/P operational mode.
Said time parameter can be the different time value that transformation absorption hydrogen generating system each step in hydrogen production process is provided with under the different working mode.
Said step can comprise that absorption, the 1st stage pressure equilibrium are fallen, the 2nd stage pressure equilibrium is fallen, along put, the 3rd level pressure equalization is fallen, reversely put that pressure, flushing, 3rd level pressure equalization liter, the 2nd stage pressure balancedly rise, the 1st stage pressure balanced rise and finally boost at least one.
Automatic switching method according to the multitower in the PSA hydrogen generating system of exemplary embodiment of the present invention; There is fault when detecting certain sequencing valve, and when causing, will excises this tower with the corresponding tower cisco unity malfunction of this sequencing valve; All the other tower works better, thus guarantee to produce uninterrupted.Similarly, can excise a plurality of towers, the PSA hydrogen generating system still can normally move.This is a key factor that improves the safety of PSA hydrogen generating system, also is the core of PSA control techniques.
Automatic switching method according to the multitower in the PSA hydrogen generating system of exemplary embodiment of the present invention; Can accurately be controlled at the switching between the various operational modes in the hydrogen production process; Make and under the situation that adsorption tower breaks down, switch to other feasible operational modes; Thereby reduced the downtime rate of PSA hydrogen generating system, ensured the continuity of producing.
Description of drawings
Through the detailed description of carrying out below in conjunction with accompanying drawing, above and other objects of the present invention, characteristics and advantage will become apparent, wherein:
Fig. 1 is the schema that the automatic switching method of the multitower in the PSA hydrogen generating system according to an exemplary embodiment of the present invention is shown;
Fig. 2 is the diagrammatic sketch that the handoff relation between the multitower is shown.
Embodiment
Fig. 1 is the schema that the automatic switching method of the multitower in the PSA hydrogen generating system according to an exemplary embodiment of the present invention is shown.
According to exemplary embodiment of the present invention, as shown in Figure 1, at step S110, the PSA hydrogen generating system is carried out initialize.PSA hydrogen generating system through after the initialize moves under the initial launch pattern.At step S120, confirm according to the information of the sequencing valve of each tower whether this tower exists fault.If confirm that at step S120 there is fault at least one tower in the said multitower; Then proceed to step S130; Time parameter according to storage in advance automatically switches to another operational mode in the suitable time with the PSA hydrogen generating system; Under said another operational mode, do not move said at least one tower that has fault.
In addition, according to another exemplary embodiment of the present invention, if confirm that at step S120 there is not fault in each tower in the said multitower, then the PSA hydrogen generating system moves under said initial launch pattern.
According to another exemplary embodiment of the present invention; Said method also can comprise step S140: if the fault of said at least one tower is excluded; Then the PSA hydrogen generating system is automatically switched to said initial launch pattern from said another operational mode, promptly return step S110.
According to another exemplary embodiment of the present invention, can come performing step S120 in the following manner: when opening the sequencing valve of this tower, confirm that then whether receiving the valve body of indicating said sequencing valve to reach the position in the given time opens limit signal; Open limit signal if receive valve body in the given time, confirm that then there is not fault in said this tower; Do not open limit signal if receive valve body in the given time, confirm that then there is fault in said this tower.
According to another exemplary embodiment of the present invention, can come performing step S120 in the following manner: when closing the sequencing valve of this tower, then confirm whether to receive in the given time the said sequencing valve of indication and close the valve body pass limit signal that puts in place; Close limit signal if receive valve body in the given time, confirm that then there is not fault in said this tower; Do not close limit signal if receive valve body in the given time, confirm that then there is fault in said this tower.
Below, will be that 6 towers are that example provides more detailed description with multitower.
Fig. 2 is the diagrammatic sketch that the handoff relation between the multitower is shown.
As shown in Figure 2, initial PSA hydrogen generating system moves with 6 towers.Under the situation of 6 towers, operational mode has only this a kind of operational mode of 6-2-3/P, promptly adopts 6 adsorption beds, the charging simultaneously of two towers, and the technology of all pressing for three times, the hydrogen purity of purification can reach 99.999%.
If a tower that detects in 6 towers breaks down, then the PSA hydrogen generating system switches to the operation of 5 towers, or is directly switch to the operation of 4 towers.Here, can still be to switch to the operation of 4 towers according to the demand of product gas output being confirmed to switch to the operation of 5 towers.The 5-2-2/P of 5 towers operations is meant 5 adsorption beds, and two tower chargings are all pressed for twice.The 4-1-2/P operational mode of 4 towers operations is 4 adsorption beds, and a tower charging is all pressed for twice.The fault tower 5 tower operation scheme that cut out on demand have 6 kinds of combinations, i.e. 5AP, 5BP, 5CP, 5DP, 5EP, 5FP, and 4 tower operation scheme have 3 kinds of combinations, i.e. 4ABP, 4CDP, 4EFP.
Here, it is pointed out that sequencing valve is connected with adsorption bed, sequencing valve breaks down and causes adsorption bed to break down, thereby the tower that comprises this adsorption bed breaks down.
Confirming to have under the situation of fault tower, PSA hydrogen generating system according to the present invention automatically switches to other operational modes, thereby can supply raw materials gas incessantly, guarantees that production needs.
Under the situation of the fault in having got rid of the fault tower, can the PSA hydrogen generating system be switched back the operational mode of 6 towers operation from the operational mode of operation of 5 towers or the operation of 4 towers.
In addition, if detect 2 fault towers, then the PSA hydrogen generating system is switched to the operational mode of 4 towers operation from the operational mode of 6 towers operation.Equally, under the situation of the fault in having got rid of this 2 fault tower, can the PSA hydrogen generating system be switched back the operational mode of 6 towers operation from the operational mode of 4 towers operation.
Abovely only described the switching between the operation of 6 towers, the operation of 5 towers and the operation of 4 towers, but the invention is not restricted to this with reference to Fig. 2.For example, when 3 towers break down, need switch to 3 tower operational modes, this is that needed blocked operation is similar with the blocked operation of describing before, is not described in detail at this.
Below will be to how the detection failure tower makes a more detailed description.
In exemplary embodiment of the present invention, detect tower according to the information of the sequencing valve of tower and whether have fault, here, fault mainly comprises sequencing valve, and this is opened and this Guan Weiguan of sequencing valve.For example, open the sequencing valve of tower if desired, do not open limit signal and receive the valve body of indicating said sequencing valve to reach the position in the given time, this is opened promptly to show sequencing valve, can confirm that then there is fault in this tower.In addition, close the sequencing valve of tower if desired, do not close limit signal, promptly show this Guan Weiguan of sequencing valve, can confirm that then there is fault in this tower and receive valve body in the given time.
According to an exemplary embodiment of the present, can realize the said scheduled time through telltale.
To switch pattern below and provide comparatively detailed description.
According to exemplary embodiment of the present invention; There is fault if confirm at least one tower in the said multitower; Then transformation is adsorbed hydrogen generating system and automatically switch to another operational mode according to the time parameter of storing in advance; Under said another operational mode, do not move said at least one tower that has fault.Here; The PSA hydrogen generating system is in hydrogen production process; Every adsorber different time to experience successively absorption (A), the 1st stage pressure equilibrium fall (E1D), the 2nd stage pressure equilibrium fall (E2D), along put (PP), (E3D), reverse pressures (D), flushing (P), 3rd level pressure equalization liter (E3R), balanced (E2R), the balanced liter of the 1st stage pressure (E1R) and the steps such as (FR) of finally boosting of rising of the 2nd stage pressure of putting fall in the 3rd level pressure equalization; Wherein, each step is called as " step ".Therefore, step can comprise that absorption, the 1st stage pressure equilibrium are fallen, the 2nd stage pressure equilibrium is fallen, along put, the 3rd level pressure equalization is fallen, reversely put that pressure, flushing, 3rd level pressure equalization liter, the 2nd stage pressure balancedly rise, the 1st stage pressure balanced rise and finally boost at least one.And time parameter is the different time value that each step in a plurality of steps of PSA hydrogen generating system in hydrogen production process is provided with under different running mode.
The PSA hydrogen generating system can switch between different operational modes according to time parameter.For example, switching to 5 towers with 6 towers is example.Suppose in 6 tower operational processs; F tower in 6 towers breaks down at the 3rd step in first fen cycle; This moment, each tower was in stable step; So can not switch to the operational mode of 5 towers operation this moment, but control best step at the predetermined switching sequence that 6 towers switch 5 towers, when the 5th step in first fen cycle of 6 towers, switch to first fen cycle the 8th step of 5 towers operation at once according to time parameter.Because the 4th step of first fen cycle except A tower and F tower adsorbed state other towers all in waiting status; The 5th step was to go on foot the point that the adsorption tower change of state takes place near the 3rd; And first fen cycle the 8th step goodness of fit is good when running status and the 5 towers operation in the 5th step, just excises the F tower, and the E tower switches to adsorbed state; The D tower is switched to second stage pressure equalization and is fallen by contrary putting; Other towers are undertaken by former switching state, and such selection has reduced to greatest extent cuts tower to the influence of fluctuations that system produces, and makes system's smooth transition to another kind of operation scheme.
Automatic switching method according to the multitower in the PSA hydrogen generating system of exemplary embodiment of the present invention; There is fault when detecting certain sequencing valve, and when causing, will excises this tower with the corresponding tower cisco unity malfunction of this sequencing valve; All the other tower works better, thus guarantee to produce uninterrupted.Similarly, can excise a plurality of towers, the PSA hydrogen generating system still can normally move.This is a key factor that improves the safety of PSA hydrogen generating system, also is the core of PSA control techniques.
Automatic switching method according to the multitower in the PSA hydrogen generating system of exemplary embodiment of the present invention; Can accurately be controlled at the switching between the various operational modes in the hydrogen production process; Make and under the situation that adsorption tower breaks down, switch to other feasible operational modes; Thereby reduced the downtime rate of PSA hydrogen generating system, ensured the continuity of producing.
Claims (12)
1. the automatic switching method of the multitower in the transformation absorption hydrogen generating system is characterized in that, said method comprising the steps of:
When transformation absorption hydrogen generating system moves, confirm according to the information of the sequencing valve of each tower whether this tower exists fault under the initial launch pattern;
There is fault if confirm at least one tower in the said multitower; Then in the suitable time transformation is adsorbed hydrogen generating system and automatically switch to another operational mode according to the time parameter of storing in advance; Under said another operational mode, do not move said at least one tower that has fault.
2. the method for claim 1 is characterized in that, confirms according to the information of the sequencing valve of each tower whether this tower exists the step of fault to comprise:
When opening the sequencing valve of this tower, confirm whether to receive in the given time the valve body of indicating said sequencing valve to reach the position and open limit signal;
Open limit signal if receive valve body in the given time, confirm that then there is not fault in said this tower; Do not open limit signal if receive valve body in the given time, confirm that then there is fault in said this tower.
3. the method for claim 1 is characterized in that, confirms according to the information of the sequencing valve of each tower whether this tower exists the step of fault to comprise:
When closing the sequencing valve of this tower, then confirm whether to receive in the given time the said sequencing valve of indication and close the valve body pass limit signal that puts in place;
Close limit signal if receive valve body in the given time, confirm that then there is not fault in said this tower; Do not close limit signal if receive valve body in the given time, confirm that then there is fault in said this tower.
4. the method for claim 1 is characterized in that, said method also comprises: if the fault of said at least one tower is excluded, then transformation is adsorbed hydrogen generating system and automatically switch to said initial launch pattern from said another operational mode.
5. the method for claim 1 is characterized in that, said multitower is 6 towers, and said initial launch pattern is the 6-2-3/P operational mode.
6. method as claimed in claim 5 is characterized in that, confirms said another operational mode according to the quantity of at least one tower that has fault.
7. method as claimed in claim 6 is characterized in that, is 1 if there is the quantity of at least one tower of fault, and then said another operational mode is the operational mode of 5 towers operation or the operational mode of 4 towers operation.
8. method as claimed in claim 6 is characterized in that, is 2 if there is the quantity of at least one tower of fault, and then said another operational mode is the operational mode of 4 towers operation.
9. method as claimed in claim 7 is characterized in that, the operational mode of 5 towers operation is the 5-2-2/P operational mode.
10. like claim 7 or 8 described methods, it is characterized in that the operational mode of 4 towers operation is the 4-1-2/P operational mode.
11. the method for claim 1 is characterized in that, said time parameter is the different time value that transformation absorption hydrogen generating system each step in hydrogen production process is provided with under the different working mode.
12. method as claimed in claim 11; It is characterized in that, said step comprises that absorption, the 1st stage pressure equilibrium are fallen, the 2nd stage pressure equilibrium is fallen, along put, the 3rd level pressure equalization is fallen, reversely put that pressure, flushing, 3rd level pressure equalization liter, the 2nd stage pressure balancedly rise, the 1st stage pressure balanced rise and finally boost at least one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101706668A CN102344119A (en) | 2011-06-23 | 2011-06-23 | Method for automatically switching a plurality of towers in pressure swing adsorption (PSA) hydrogen production system |
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| CN2011101706668A CN102344119A (en) | 2011-06-23 | 2011-06-23 | Method for automatically switching a plurality of towers in pressure swing adsorption (PSA) hydrogen production system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105749697A (en) * | 2016-05-05 | 2016-07-13 | 中国石油集团工程设计有限责任公司 | Dehydration tower optimization control method for molecular sieve dehydration device |
| CN111545013A (en) * | 2020-05-11 | 2020-08-18 | 杭州和利时自动化有限公司 | Control method and control system of pressure swing adsorption system |
| CN112744786A (en) * | 2019-10-31 | 2021-05-04 | 内蒙古伊泰煤制油有限责任公司 | Pressure swing adsorption hydrogen production process |
| CN113634088A (en) * | 2020-12-30 | 2021-11-12 | 山东红枫环境能源有限公司 | Tower cutting method |
| CN113713564A (en) * | 2021-09-07 | 2021-11-30 | 安徽泉盛化工有限公司 | Pressure swing adsorption system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105749697A (en) * | 2016-05-05 | 2016-07-13 | 中国石油集团工程设计有限责任公司 | Dehydration tower optimization control method for molecular sieve dehydration device |
| CN112744786A (en) * | 2019-10-31 | 2021-05-04 | 内蒙古伊泰煤制油有限责任公司 | Pressure swing adsorption hydrogen production process |
| CN111545013A (en) * | 2020-05-11 | 2020-08-18 | 杭州和利时自动化有限公司 | Control method and control system of pressure swing adsorption system |
| CN113634088A (en) * | 2020-12-30 | 2021-11-12 | 山东红枫环境能源有限公司 | Tower cutting method |
| CN113634088B (en) * | 2020-12-30 | 2024-01-26 | 山东红枫环境能源有限公司 | Tower cutting method |
| CN113713564A (en) * | 2021-09-07 | 2021-11-30 | 安徽泉盛化工有限公司 | Pressure swing adsorption system |
| CN113713564B (en) * | 2021-09-07 | 2024-04-26 | 安徽泉盛化工有限公司 | Pressure swing adsorption system |
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