CN115449845B - Hydrogen purification system with automatic adjustment capability - Google Patents

Hydrogen purification system with automatic adjustment capability Download PDF

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Publication number
CN115449845B
CN115449845B CN202211137934.0A CN202211137934A CN115449845B CN 115449845 B CN115449845 B CN 115449845B CN 202211137934 A CN202211137934 A CN 202211137934A CN 115449845 B CN115449845 B CN 115449845B
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hydrogen purification
purification device
hydrogen
electric control
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CN115449845A (en
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代凯峰
齐志新
陈明轩
桂本
李冬芳
罗宵
王乾
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Three Gorges Technology Co ltd
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Three Gorges Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B15/00—Operating or servicing cells
    • C25B15/08—Supplying or removing reactants or electrolytes; Regeneration of electrolytes
    • C25B15/083—Separating products
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
    • C01B3/50—Separation of hydrogen or hydrogen containing gases from gaseous mixtures, e.g. purification
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/02—Hydrogen or oxygen
    • C25B1/04—Hydrogen or oxygen by electrolysis of water
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis

Abstract

The invention provides a hydrogen purification system with automatic adjustment capability, comprising: a cyclic purification system and a cyclic purification control system. The cyclic purification system includes: an input manifold, an output manifold, and at least 3 hydrogen purification device sets connected between the input manifold and the output manifold. Each hydrogen purification device group comprises a plurality of hydrogen purification devices which are connected in sequence: the inlet end of the third separator is communicated with the input main pipe through the first circulating pipeline control system, and the outlet end of the adsorption tower is communicated with the output main pipe through the second circulating pipeline control system. The cyclic purification control system includes: and the signal connection module and the analysis control module. The analysis control module is subjected to regeneration analysis, and controls the first circulation pipeline control system and the second circulation pipeline control system through the signal connection module based on a regeneration analysis result.

Description

Hydrogen purification system with automatic adjustment capability
Technical Field
The invention belongs to the technical field of hydrogen production by water electrolysis, and particularly relates to a hydrogen purification system with automatic regulation capability.
Background
Along with the vigorous development of the water electrolysis hydrogen production technology, a plurality of countries and regions have listed the technology into the medium and long-term development planning targets, and the technology is gradually highlighted in the fields of application demonstration and the like, thus being a strategic resource technology which is important at present. Along with the further development of hydrogen energy technology and the influence of large-scale cluster effect, the large-scale of the equipment for producing hydrogen by electrolyzing water is imperative.
The existing common alkaline electrolyzed water hydrogen gas-liquid separation and purification system is generally provided with 2 sets of devices, wherein when one set of devices performs gas-liquid separation and purification, the other set of devices loses adsorption capacity, is converted into regeneration, and performs cyclic reciprocation in this way, and the existing alkaline electrolyzed water hydrogen gas-liquid separation and purification system has the following defects:
1. the existing system mainly aims at the one-to-many use environment, namely each product line needs to be provided with 2 sets of hydrogen purification devices to carry out circulation work, each set of hydrogen purification device needs to work for a long time under large capacity, the time sequence requirement cannot be met under the large-scale one-to-many form, and the later purification system regeneration is not facilitated.
2. The hydrogen purification device is added or reduced in a matched manner in the production line increase or the production line decrease, and the dynamic regulation and control of the productivity are not facilitated.
3. The regeneration needs to introduce special regeneration gas, and the regenerated gas can not reach the product gas index without treatment, and can only be directly exhausted, so that the waste of hydrogen resources and heat is caused.
Disclosure of Invention
To overcome the problems of the prior art, the present invention illustratively provides a hydrogen purification system with automatic regulation capability, comprising: a cyclic purification system and a cyclic purification control system. The cyclic purification system includes: an input manifold, an output manifold, and at least 3 hydrogen purification device sets connected between the input manifold and the output manifold. Each hydrogen purification device group comprises a plurality of hydrogen purification devices which are connected in sequence: the inlet end of the third separator is communicated with the input main pipe through the first circulating pipeline control system, and the outlet end of the adsorption tower is communicated with the output main pipe through the second circulating pipeline control system.
The first circulation line control system includes: and the first communicating pipe group is used for connecting the inlet end of each third separator with the input branch pipe of the input main pipe and communicating the input branch pipes with each other. The input branch pipe is provided with a first electric control switch valve on a pipeline between the first communicating pipe group and the input main pipe, and the first communicating pipe group is provided with a second electric control switch valve for controlling the communication relation.
The second circulation line control system includes: and the output branch pipe is connected with the outlet end of the adsorption tower and the output main pipe. The output branch pipe is provided with a second electric control three-way valve, the inlet end of the second electric control three-way valve is communicated with the outlet end of the adsorption tower, one outlet end is communicated with the output main pipe, and the other outlet end is communicated with the inlet end of the third electric control three-way valve. One outlet end of the third electric control three-way valve is communicated with the first circulating pipe, and the other outlet end of the third electric control three-way valve is communicated with the second circulating pipe. The first circulating pipe is communicated with the output main pipe through a connecting pipe, and a fourth electric control switch valve is arranged on the connecting pipe. The second circulation pipe is communicated with the output main pipe.
The cyclic purification control system includes: and the signal connection module and the analysis control module. One end of the signal connection module is respectively connected with the first electric control switch valve, the second electric control three-way valve, the third electric control three-way valve and the fourth electric control switch valve in a signal manner, and the other end of the signal connection module is connected with the analysis control module in a signal manner. The analysis control module is subjected to regeneration analysis, and based on a regeneration analysis result, a control instruction is sent to the first electric control switch valve, the second electric control three-way valve, the third electric control three-way valve and the fourth electric control switch valve through the signal connection module, so that at least 1 group of at least 3 groups of hydrogen purification device groups is in a working mode, and the rest groups start a regeneration mode according to requirements.
The present invention exemplarily provides a regeneration analysis method, including:
s1, selecting all hydrogen purification device groups which are not in an operation mode at present, and marking the group which is controlled to be a regeneration mode at the last time as a group C. All hydrogen purification device groups currently in the operational mode are selected and labeled as group D.
S2, acquiring current time information, comparing the current time information with the node information of the preset time of the next stage when the current time information is located in the preset time period at the tail end of the current time node, judging the number of hydrogen purification device groups which should start a working mode in the next stage, establishing a blank group A, and establishing a blank group B. The number of the hydrogen purification device groups in the blank group A is less than or equal to the number of the hydrogen purification device groups in the blank group B, and the sum of the number of the hydrogen purification device groups in the blank group A and the blank group B is less than the total number X of the hydrogen purification device groups.
S3, selecting a hydrogen purification device group from the group C to fill the blank group A to obtain a work control group F. And selecting a hydrogen purification device group from the group D to fill the blank group B to obtain a regeneration control group G.
S4, selecting at least 1 hydrogen purification device group which is not in the working control group F, the regeneration control group G and the group D as a regeneration gas purification group H.
S5, forming a control instruction set for each electric control valve in the first circulation pipeline control system and the second circulation pipeline control system according to the working control group F, the regeneration control group G and the regeneration gas purification group H, wherein the control instruction set is the regeneration analysis result.
The hydrogen purification device group of the working control group F is the hydrogen purification device group of the working mode, at the moment, upstream hydrogen is accessed from an input main pipe, and then the hydrogen and the oxygen are separated through a third separator, the second cooler is used for cooling, and the adsorption tower is used for adsorbing the oxygen, so that the high-purity product gas is obtained. The hydrogen purification device group of the regeneration control group G is the hydrogen purification device group of the regeneration mode, and at the moment, the product gas sequentially passes through the adsorption tower, the second cooler and the third separator after being accessed from the second circulation pipeline control system, and regenerates the adsorption tower. The hydrogen purification device group of the regenerated gas purification group H is the hydrogen purification device group of the regeneration purification mode, and the product gas regenerated by the adsorption tower at the moment sequentially passes through a third separator, a second cooler and the adsorption tower to purify the regenerated gas and then is conveyed to an output main pipe.
The invention is exemplified by the following steps between an input header pipe and a hydrogen outlet end of a gas-liquid separation system along the gas flow direction: a first separator, a deoxidizing tower, a first cooler and a second separator.
According to the invention, the hydrogen concentration detector is installed on the output main pipe in an exemplary manner, the tail end of the output main pipe is communicated with the input end of the first electric control three-way valve, one outlet end of the first electric control three-way valve is communicated with the qualified product air pipe, and the other outlet end of the first electric control three-way valve is communicated with the unqualified product air discharge pipe. The signal output end of the hydrogen concentration detector is in signal connection with the control end of the first electric control three-way valve.
The invention provides preset time node information of a next stage, which comprises the following steps: time period information T n Information K on the number of hydrogen purification device groups to which the operating mode should be activated n Wherein:
T n the starting time point of (1) is the current preset time node T n-1 T at the final time point of (2) n Length of time L of (2) n The method meets the following conditions: l (L) n ＝(ΣQ m )/J n ，J n For the current hydrogen flow rate of the input circulating purification system, Q m For the preset maximum throughput, Q, of the purification operation of the hydrogen purification unit group numbered m m The corresponding hydrogen purification device groups are taken from groups C and Q m The number of the corresponding hydrogen purification device groups is K n 。
K n Is a positive integer and is 1 to less than or equal to K n N is less than or equal to the maximum number of hydrogen purification device groups capable of starting the working mode, and N is less than (1/2) X. .
The invention provides a first electric control switch valve, which is as follows: an electrically controlled flow control valve. The electric control flow control valve controls the air flow rate input into the third separator, the second cooler and the adsorption tower according to the preset treatment flow rate requirements of the third separator, the second cooler and the adsorption tower in the corresponding group.
The invention provides a K n The determining method comprises the following steps:
(1)K n first pre-fetching the value K n-1 ，K n The number of hydrogen purification device groups, K, to be started for the next stage preset time node n-1 The number of hydrogen purification device groups to be started for the current preset time node.
(2) Calculating R n ＝(ΣY m )/J n . Wherein Y is m For the optimal product gas flow during purification operation of the hydrogen purification unit group numbered m, Y m Corresponding hydrogen purification device groupTaken from group C and Y m The number of the corresponding hydrogen purification device groups is K n-1 . The following judgment is made:
when R is n At > 1, R is calculated sequentially (n+i) At this time Y m Taken from group C and Y m The number of the values is K n-1 -i, i is a positive integer starting from 1. To R (n+i) Stopping calculation when the value is less than 1, wherein K n Take the value K n-1 -i+1 as final output K n . The hydrogen purification device group selected in the i-1 th group is the hydrogen purification device group filled with the blank group A in the step S3.
When R is n When less than 1, R is calculated in turn (n+i) At this time Y m Taken from group C and Y m The number of the values is K n-1 +i, i is a positive integer starting from 1. To R (n+i) Stopping the calculation when > 1, at this time K n Take the value K n-1 +i as final output K n . The hydrogen purification device group selected in the i-th group is the hydrogen purification device group filled with the blank group a in step S3.
At this time, the Q m The corresponding hydrogen purification device group is the Y m The same hydrogen purification unit set as the corresponding hydrogen purification unit set.
The invention provides an L n The judging method of (2) comprises the following steps: k (K) n First pre-fetching the value K n-1 ，K n The number of hydrogen purification device groups, K, to be started for the next stage preset time node n-1 The hydrogen purification device group number which is started for the current preset time node is determined, and the L is determined n Whether or not to meet L 0 ≤L n ≤L 1 Wherein L is 0 For minimum duration, L 1 Is the maximum duration:
when L n Satisfy L 0 ≤L n ≤L 1 When K is n Take the value K n-1 。
When L n ＞L 1 At this time, a set of deductions with the smallest value is selected from Qm, and L is recalculated n The method comprises the steps of carrying out a first treatment on the surface of the Circulating the above steps to L n ≤L 1 。
When L n ＜L 0 At the same time, in self-group CSelecting S hydrogen purification device groups to form K n +S group hydrogen purification device group based on K n New L is calculated in +S group hydrogen purification device group n And (3) the method. S is a positive integer from 1, L n The calculation is carried out according to the value sequence of S to L n `＞L 0 Stopping and judging:
when K is n K when +S > N n Take the value K n +S-1, and gives an overrun alarm to the user.
When K is n K when +S is less than or equal to N n Take the value K n +S。
And finally, the selected all hydrogen purification device groups are the hydrogen purification device groups filled with blank groups A in the step S3.
In group C, the present invention illustratively forms rank E by ranking the historical regeneration times of the day from high to low. And selecting the hydrogen purification device group from the group C or adding the selected hydrogen purification device group, and selecting according to the sequence of the sequence E to form a sequence P. And when the selected hydrogen purification device group is reduced, selecting in the reverse direction from the sequencing P.
In the method, when the hydrogen purification device group is selected to fill the blank group B, the hydrogen purification device group of the group D is preferentially selected to fill, if the number of the hydrogen purification device groups of the group D is insufficient, the hydrogen purification device group is reversely selected from the sequence E to fill until the blank group B is fully filled, and then the regeneration control group G is obtained.
The invention provides preset time node information of a next stage, which comprises the following steps: time period information T n Information K on the number of hydrogen purification device groups to be activated in operation mode n And (c) wherein:
T n the starting time point of' is the current preset time node T n-1 T at the final time point of (2) n Duration L of n The following are satisfied: l (L) n ``＝W 1 *L n Wherein W is 1 For the first adjustment coefficient, the value is 0.9 to or less than W 1 ＜1.0。
K n `＝W 2 *K n Wherein W is 2 For the second adjustment coefficient, the value is 1.0 < W 2 ≤1.2。
The invention has at least one of the following advantages:
1. the circulating purification system realizes the self-circulation control of three modes of adsorption, regeneration and drying under the same set of system, and can meet the requirement of time sequence switching from many to one.
2. The gas used for regeneration is the product gas in the circulation system, and most of the regenerated gas can reach the product gas concentration requirement after the product gas is treated again and absorbs heat in the circulation system, so that the loss of the regenerated gas in the regeneration process is effectively reduced, the heat energy is effectively recycled, and the energy consumption is reduced.
3. The invention can ensure the safe, stable and efficient operation of the purification process under different loads, thereby being applicable to the gas-liquid separation and purification work under various production loads.
4. In the hydrogen purification system, on one hand, the hydrogen purification device groups can be increased/decreased in a modularized and standardized way, and the hydrogen purification device groups matched with the capacity number can be correspondingly operated by dynamically regulating and controlling the system according to the capacity.
5. The invention can carry out maintenance without stopping production on the hydrogen purification device group, thereby effectively stabilizing the productivity.
Drawings
FIG. 1 is a schematic diagram of a purification system of the present invention in which the structure of the 3-group hydrogen purification device is shown;
FIG. 2 is a schematic diagram of a first circulation line control system according to the present invention;
FIG. 3 is a schematic diagram of a second circuit line control system according to the present invention;
in the figure: 1. a first separator. 2. And (3) a deoxidizing tower. 3. A first cooler. 4. And a second separator. 5. An adsorption tower. 6. And a second cooler. 7. And a third separator. 8. And a third electrically controlled switch valve. 9. And a fourth electrically controlled switch valve. 10. And (5) connecting pipes. 20. The first electric control three-way valve. 21. Cooling water is fed into the header pipe. 24. And (5) inputting the total pipe. 25. And (5) outputting a main pipe. 26. And a cooling water output header pipe. 27. Condensate discharging branch pipe. 28. And a condensate discharge header. 29. And (5) inputting the branched pipes. 30. A first communicating tube group. 31. And outputting the branched pipes. 32. A first circulation pipe. 33. And a second circulation pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
A hydrogen purification system with automatic regulation capability, as shown in fig. 1, comprising: a cyclic purification system and a cyclic purification control system. The cyclic purification system includes: an input manifold 24, an output manifold 25, and 3 hydrogen purification device sets connected between the input manifold 24 and the output manifold 25. Each hydrogen purification device group comprises a plurality of hydrogen purification devices which are connected in sequence: the third separator 7, the second cooler 6 and the adsorption tower 5, wherein the inlet end of the third separator 7 is communicated with the input main pipe 24 through the first circulating pipeline control system, and the outlet end of the adsorption tower 5 is communicated with the output main pipe 25 through the second circulating pipeline control system.
The cooling pipe input ends of the second coolers 6 are connected in parallel to a cooling water input main pipe 21, and the cooling pipe output ends of the second coolers 6 are connected in parallel to a cooling water output main pipe 26. The cooling water input manifold 21 and the cooling water output manifold 26 are communicated with an external cooling water circulation system. The first cooler 3 and each second cooler 6 can be managed in a unified mode, and equipment inspection difficulty and equipment arrangement difficulty are reduced.
Each third separator 7 is provided with a condensing mechanism. The condensing mechanism can condense the moisture separated by the separator and then discharge the moisture to the condensate discharging manifold 28 through the condensate discharging branch pipe 27. The condensing mechanism can be a condensing liquid pool filled with condensate as required, when gas is required to be condensed, the gas subjected to gas-liquid separation enters the condensing liquid pool, and the gas is cooled through the condensate, so that water vapor in the gas is converted into water to be dissolved in the condensate. The condensate discharging branch pipes 27 are respectively provided with a fifth electric control switch valve according to the requirements, and the condensate liquid tank is internally provided with an electronic liquid level meter which is used for controlling the fifth electric control switch valve so that condensate in the condensate liquid tank keeps a preset liquid level range. For example: when the condensate liquid level in the condensate liquid pool exceeds a preset highest threshold, the electronic liquid level meter controls the fifth electric control switch valve to be opened, the condensate in the condensate liquid pool is discharged, and when the condensate liquid level in the condensate liquid pool is reduced to the preset lowest threshold, the electronic liquid level meter controls the fifth electric control switch valve to be closed.
The adsorption tower 5 is internally or externally provided with a heating device, and the heating device can be as follows according to the requirement: at least one of a resistance heating system, a steam heating system, a microwave heating system, an infrared heating system and an electromagnetic heating system. The heating device of the adsorption tower 5, such as that used in fig. 1, is an external resistance heating system.
As shown in fig. 2 and 3, the 3 third separators 7 are a third separator 7-a, a third separator 7-B, and a third separator 7-C, respectively. The 3 second coolers are respectively a second cooler 6-A, a second cooler 6-B and a second cooler 6-C. The 3 adsorption towers 5 are respectively an adsorption tower 5-A, an adsorption tower 5-B and an adsorption tower 5-C. At this time:
as shown in fig. 2, the first circulation line control system includes: an input branch 29-a connecting the third separator 7-a with the input manifold 24, and an input branch connecting the third separator 7-B with the input manifold 24
29-B, an input branch 29-C connecting the third separator 7-C with the input manifold 24. The input branch pipe 29-A is provided with a first electric control switch valve XV-01A, the input branch pipe 29-B is provided with a first electric control switch valve XV-01B, and the input branch pipe 29-C is provided with a first electric control switch valve XV-01C. The first communicating pipe group 30 includes: a first communicating tube group 30-a and a first communicating tube group 30-B, wherein: the first communicating tube group 30-A communicates with the input branch 29-A, the input branch 29-B, and the input branch 29-C, and the first communicating tube group 30-B communicates with the input branch 29-A and the input branch 29-C. The first communicating tube group 30-A is provided with a second electric control switch valve XV-02A between the input branch tube 29-A and the input branch tube 29-B, the first communicating tube group 30-A is provided with a second electric control switch valve XV-02C between the input branch tube 29-B and the input branch tube 29-C, and the first communicating tube group 30-B is provided with a second electric control switch valve XV-02B.
The second electrically controlled three-way valve and the third electrically controlled three-way valve are shown in fig. 3, wherein the inlet end of the second electrically controlled three-way valve is marked as 1, one outlet end is marked as 2, and the other outlet end is marked as 3. The third electrically controlled three-way valve has its inlet end marked 1, its outlet end marked 2 and its other outlet end marked 3.
As shown in fig. 3, the second circulation line control system includes: an output branch pipe 31-A for communicating the adsorption tower 5-A with the output header pipe 25. The output branch pipe 31-A is provided with a second electric control three-way valve XV-03A, the inlet end of the second electric control three-way valve XV-03A is communicated with the adsorption tower 5-A, one outlet end of the second electric control three-way valve XV-03A is communicated with the output main pipe 25, and the other outlet end of the second electric control three-way valve XV-03A is communicated with the inlet end of the third electric control three-way valve XV-04A. An output branch pipe 31-B for communicating the adsorption tower 5-B with the output header pipe 25. The output branch pipe 31-B is provided with a second electric control three-way valve XV-03B, the inlet end of the second electric control three-way valve XV-03B is communicated with the adsorption tower 5-B, one outlet end of the second electric control three-way valve XV-03B is communicated with the output main pipe 25, and the other outlet end of the second electric control three-way valve XV-03B is communicated with the inlet end of the third electric control three-way valve XV-04B. And an output branch pipe 31-C for communicating the adsorption tower 5-C with the output header pipe 25. The output branch pipe 31-C is provided with a second electric control three-way valve XV-03C, the inlet end of the second electric control three-way valve XV-03C is communicated with the adsorption tower 5-C, one outlet end of the second electric control three-way valve XV-03C is communicated with the output main pipe 25, and the other outlet end of the second electric control three-way valve XV-03C is communicated with the inlet end of the third electric control three-way valve XV-04C. The output main pipe 25 is provided with a third electric control switch valve 8. The first circulation pipe 32 is provided with 4 connection ports, 1 connection port is communicated with the output main pipe 25 on the inlet side pipe section of the third electric control switch valve 8 through a connection pipe 10, a fourth electric control switch valve 9 is arranged on the connection pipe 10, and the other 3 connection ports are respectively communicated with the outlet end 2 of the third electric control three-way valve XV-04A, the outlet end 2 of the third electric control three-way valve XV-04B and the outlet end 2 of the third electric control three-way valve XV-04C. The second circulation pipe 33 is provided with 4 connection ports, wherein 3 connection ports are respectively communicated with the outlet end 3 of the third electric control three-way valve XV-04A, the outlet end 3 of the third electric control three-way valve XV-04B and the outlet end 3 of the third electric control three-way valve XV-04C, and the other connection port is communicated with the output main pipe 25 on the outlet side pipe section of the third electric control switch valve 8.
The cyclic purification control system includes: and the signal connection module and the analysis control module. One end of the signal connection module is respectively connected with the first electric control switch valve, the second electric control three-way valve, the third electric control three-way valve and the fourth electric control switch valve 9 in a signal manner, and the other end of the signal connection module is connected with the analysis control module in a signal manner. The analysis control module sends control instructions to the first electric control switch valve, the second electric control three-way valve, the third electric control three-way valve and the fourth electric control switch valve 9 through the signal connection module based on the regeneration analysis result, so that 1 group is in a working mode, 1 group is started to be in a regeneration mode, and 1 group is started to be in a regeneration gas purification mode.
The regeneration analysis method comprises the following steps:
s1, selecting all hydrogen purification device groups which are not in an operation mode at present, and marking the group which is controlled to be a regeneration mode at the last time as a group C. All hydrogen purification device groups currently in the operational mode are selected and labeled as group D.
S2, acquiring current time information, comparing the current time information with the node information of the preset time of the next stage when the current time information is located in the preset time period at the tail end of the current time node, judging the number of hydrogen purification device groups which should start a working mode in the next stage, establishing a blank group A, and establishing a blank group B. The number of the hydrogen purification device groups in the blank group A is less than or equal to the number of the hydrogen purification device groups in the blank group B, and the sum of the number of the hydrogen purification device groups in the blank group A and the blank group B is less than the total number X of the hydrogen purification device groups.
S3, selecting a hydrogen purification device group from the group C to fill the blank group A to obtain a work control group F. And selecting a hydrogen purification device group from the group D to fill the blank group B to obtain a regeneration control group G.
S4, selecting at least 1 hydrogen purification device group which is not in the working control group F, the regeneration control group G and the group D as a regeneration gas purification group H.
S5, forming a control instruction set for each electric control valve in the first circulation pipeline control system and the second circulation pipeline control system according to the working control group F, the regeneration control group G and the regeneration gas purification group H, wherein the control instruction set is the regeneration analysis result.
Taking the process of a local recycle purification control system controlling a first recycle line control system and a second recycle line control system as an example:
when the system starts to work: after regeneration analysis, the control valve group is opened at the first switching valve XV-01A, the first switching valve XV-01B is closed, the first switching valve XV-01C is closed, the second switching valve XV-02A is closed, the second switching valve XV-02B is closed, and the second switching valve XV-02C is opened, so that the gas input from the input manifold 24 is controlled to enter the adsorption tower 5-A from the third separator 7-A and the second cooler 6-A, and the adsorption tower 5-C starts to be preheated to 200 ℃. Meanwhile, the second three-way valve XV-03A of the control valve group is opened for 1-2 channels, the second three-way valve XV-03B is opened for 1-3 channels, the second three-way valve XV-03C is opened for 1-3 channels, the third three-way valve XV-04A is opened for 1-3 channels, the third three-way valve XV-04B is opened for 1-3 channels, the third three-way valve XV-04C is opened for 1-2 channels, and the fourth switch valve 9 is opened.
At this time, the product gas processed by the third separator 7-A, the second cooler 6-A and the adsorption tower 5-A enters the output header 25, part of the product gas enters the first circulating pipe 32 through the connecting pipe 10, enters the adsorption tower 5-C in a regeneration mode from the third three-way valve XV-04C and the second three-way valve XV-03C, and enters the output header 25 after passing through the first communicating pipe group 30-A and the second switching valve XV-02C after passing through the first cooler 6-A and the third separator 7-C after preliminary dehumidification, and finally enters the output header 25 after passing through the second cooler 6-B and the adsorption tower 5-B and finally entering the second circulating pipe 33 through the second three-way valve XV-03B and the third three-way valve XV-04B.
After 2 hours, the adsorption tower 5-C stops heating and enters a cold blowing/cooling mode to enter an adsorption mode of the next stage. After regeneration analysis, a valve control instruction set for the next time period is determined.
After 8 hours, the control valve group is closed by the first switch valve XV-01A, the first switch valve XV-01B, the first switch valve XV-01C, the second switch valve XV-02A and the second switch valve XV-02B, and the second switch valve XV-02C. And controlling the gas to enter the corresponding adsorption tower 5-C in the adsorption mode, and simultaneously starting preheating the adsorption tower 5-B to 200 ℃. Meanwhile, the second three-way valve XV-03C is controlled to open a 1-2 channel, the second three-way valve XV-03A is controlled to open a 1-3 channel, the second three-way valve XV-03B is controlled to open a 1-3 channel, the third three-way valve XV-04C is controlled to open a 1-3 channel, the third three-way valve XV-04A is controlled to open a 1-3 channel, the third three-way valve XV-04B is controlled to open a 1-2 channel, and the fourth switch valve 9 is controlled to open.
At this time, the product gas processed by the third separator 7-C, the second cooler 6-C and the adsorption tower 5-C enters the output header 25, part of the product gas enters the first circulating pipe 32 through the connecting pipe 10, enters the adsorption tower 5-B in a regeneration mode from the third three-way valve XV-04B and the second three-way valve XV-03B, and enters the output header 25 after passing through the first communicating pipe group 30-A and the second switching valve XV-02A after passing through the second cooler 6-A and the adsorption tower 5-A after preliminary dehumidification by passing through the second cooler 6-B and the third separator 7-B in sequence, and finally enters the output header 25 after passing through the second three-way valve XV-03A and the third three-way valve XV-04A.
After 10 hours, the adsorption tower 5-B stops heating and enters a cold blowing mode to enter an adsorption mode of the next stage. After regeneration analysis, a valve control instruction set for the next time period is determined.
After 16 hours, the control valve group is closed by the first switching valve XV-01A, opened by the first switching valve XV-01B, closed by the first switching valve XV-01C, closed by the second switching valve XV-02A, opened by the second switching valve XV-02B and closed by the second switching valve XV-02C. And controlling the gas to enter the corresponding adsorption tower 5-B in the adsorption mode, and simultaneously starting preheating the adsorption tower 5-A to 200 ℃. Meanwhile, the second three-way valve XV-03B is controlled to open a 1-2 channel, the second three-way valve XV-03A is controlled to open a 1-3 channel, the second three-way valve XV-03C is controlled to open a 1-3 channel, the third three-way valve XV-04B is controlled to open a 1-3 channel, the third three-way valve XV-04A is controlled to open a 1-2 channel, the third three-way valve XV-04C is controlled to open a 1-3 channel, and the fourth switch valve 9 is controlled to open.
At this time, the product gas processed by the third separator 7-B, the second cooler 6-B and the adsorption tower 5-B enters the output header 25, part of the product gas enters the first circulating pipe 32 through the connecting pipe 10, enters the adsorption tower 5-A in a regeneration mode from the third three-way valve XV-04A and the second three-way valve XV-03A, and enters the output header 25 after passing through the first communicating pipe group 30-A and the second switching valve XV-02B after passing through the second cooler 6-C and the adsorption tower 5-C after preliminary dehumidification by passing through the second cooler 6-A and the third separator 7-A in sequence, and finally enters the output header 25 after passing through the second three-way valve XV-03C and the third three-way valve XV-04C.
After 18 hours, the adsorption tower 5-A stops heating and enters a cold blowing mode to enter an adsorption mode of the next stage. After regeneration analysis, a valve control instruction set for the next time period is determined.
After 24 hours, a complete cycle was completed and then reciprocally performed.
Compared with the regeneration mode of one set of device working one set of device of the existing alkaline electrolyzed water hydrogen-making liquid separation and purification system, the invention is provided with at least 3 sets of hydrogen purification device sets, and under the control of the first circulation pipeline control system and the second circulation pipeline control system by the circulation purification control system, at least 1 set of hydrogen purification device sets can be in the working mode of gas-liquid separation and purification work, at least 1 set of product gas is obtained and used for regenerating the adsorption tower, and at least 1 set of regeneration gas is used for gas-liquid separation and purification work and is output to the product gas. Therefore, by adopting the hydrogen purification system, in the mode of many-to-one, the device circulation can be realized as long as the time of the working mode is longer than the regeneration time, so that the system can adapt to the production mode of many-to-one, and can meet the requirement of time sequence switching.
Meanwhile, the gas used for regeneration is the product gas in the circulating system, the regenerated product gas belongs to hot gas, and most of the regenerated gas can meet the product gas concentration requirement through the retreatment and heat absorption of the circulating system, so that the loss of the regenerated gas in the regenerating process is effectively reduced, the heat energy is effectively recycled, and the energy consumption is reduced.
The three modes of the invention are all completed by adopting the same hydrogen purification device group, belong to a modularized design, are very convenient when the hydrogen purification device group can be newly added/reduced according to the requirement, and can be suitable for gas-liquid separation and purification work under various production loads by only controlling the first circulation pipeline control system and the second circulation pipeline control system by the circulation purification control system when the productivity is dynamically adjusted, so that hydrogen flows through the preset number of hydrogen purification device groups from different directions, and the purpose of dynamically accessing/offline hydrogen purification device groups according to the productivity can be realized, thereby ensuring the safe, stable and efficient operation of the purification process under different loads. The invention can average the working time and the regeneration time of each hydrogen purification device group in a circulating working mode, so that the loss degree of each hydrogen purification device group is equivalent, and the invention is convenient for the later maintenance and management.
Meanwhile, in the prior art, when one hydrogen purification device group needs maintenance, the maintenance must be completed before the other hydrogen purification device group reaches the upper limit of the working flow, otherwise, the upstream production line corresponding to the hydrogen purification device group can only be stopped, and the overload operation of the working hydrogen purification device group is avoided. After the hydrogen purification system is adopted, when part of hydrogen purification device groups need to be maintained or periodically maintained, only the hydrogen purification device groups need to be taken off-line, without stopping production on the whole line, particularly when the rest hydrogen purification device groups are arranged, the hydrogen purification device groups to be maintained or maintained can be taken off-line on the basis of not reducing the productivity completely, and the production stability of a production line is effectively stabilized.
Example 2
The hydrogen purification system with automatic adjustment capability according to embodiment 1, as shown in fig. 1, is provided with, in order along the gas flow direction, between the input manifold 24 and the hydrogen outlet end of the gas-liquid separation system: a first separator 1, a deoxidizing tower 2, a first cooler 3, and a second separator 4. The primary oxyhydrogen separation treatment, gas-liquid separation treatment and cooling treatment can be carried out on the product gas entering the circulating purification system through the added first separator 1, the deoxidizing tower 2, the first cooler 3 and the second separator 4. The first separator, the deoxidizing tower, the first cooler and the second separator can adopt the existing two-set structure, namely one set of structure works and the other set regenerates/stands by according to the requirements.
Example 3
The hydrogen purification system with automatic adjustment capability according to embodiment 1 is shown in fig. 1, wherein a hydrogen concentration detector is installed on the output manifold 25, the end of the output manifold 25 is connected to the input end of the first electrically controlled three-way valve 20, one outlet end of the first electrically controlled three-way valve 20 is connected to the qualified product gas pipe, and the other outlet end is connected to the unqualified product gas discharge pipe. The signal output end of the hydrogen concentration detector is in signal connection with the control end of the first electric control three-way valve 20.
The hydrogen concentration detector additionally arranged can monitor the concentration of hydrogen in the output main pipe in real time, and when the hydrogen concentration is higher than a preset threshold value, the hydrogen concentration detector sends a control signal to the first electric control three-way valve or sends a control signal to the first electric control three-way valve through the singlechip to control the first electric control three-way valve to communicate the output main pipe with a qualified product gas pipe and output the qualified product gas to a downstream system/device. When the hydrogen concentration is lower than a preset threshold value, the hydrogen concentration detector controls the first electric control three-way valve to be communicated with the output header pipe and the disqualified product gas for discharging, and the disqualified product gas is output to the corresponding processing device. Through the arrangement, the circulation direction of the qualified product gas and the unqualified product gas can be automatically controlled, and automatic differentiation treatment is realized.
Example 4
The hydrogen purification system with auto-tuning capability of embodiment 1, wherein the next-stage preset time node information comprises: time period information T n Information K on the number of hydrogen purification device groups to which the operating mode should be activated n Wherein:
T n the starting time point of (1) is the current preset time node T n-1 T at the final time point of (2) n Length of time L of (2) n The method meets the following conditions: l (L) n ＝(ΣQ m )/J n ，J n For the current hydrogen flow rate of the input circulating purification system, Q m For the preset maximum throughput, Q, of the purification operation of the hydrogen purification unit group numbered m m The corresponding hydrogen purification device groups are taken from groups C and Q m Corresponding hydrogen purificationThe number of the device groups is K n 。
K n Is a positive integer and is 1 to less than or equal to K n N is less than or equal to the maximum number of hydrogen purification device groups capable of starting the working mode, and N is less than (1/2) X. .
Taking a local recycle purification system as an example, comprising 8 hydrogen purification device sets, the list is as follows:
at this time, N is 3, K n Taking 2, during the current period, group C includes: q (Q) 3 To Q 8 Group, qm takes Q 3 And Q 4 Two groups, calculated: l (L) n ＝(ΣQ m )/J n ＝(Q 3+ Q 4 )/J n ＝(986+1007)/376＝5.3h。
In the prior art, a timing control mode is generally adopted for the switching control of the separation and purification device, namely, the timing switching control is carried out according to preset time. The existing control mode does not consider the problems of capacity change and performance difference of each separation and purification device, so that the existing separation and purification device does not reach the maximum treatment capacity, and the existing separation and purification device has excessive problems. On the one hand, the full utilization of the equipment is not facilitated, and on the other hand, the stable product quality is not facilitated.
After the control method is adopted, the control time length of each control period is related to the product gas inflow rate according to the total preset maximum treatment capacity of the selected hydrogen purification device group, and the time length of each control period is dynamically controlled, so that the equipment performance can be fully utilized in each period without the problems that the separation and purification devices do not reach the maximum treatment capacity yet and the separation and purification devices are excessive.
The first electrically controlled switching valve is an electrically controlled flow control valve according to the requirement. The electric control flow control valve controls the input airflow flow according to the preset treatment flow requirements of the corresponding group of third separators, the second coolers and the adsorption towers. For example: q (Q) 3 The input flow of the group is: 986/5.3=186 m 3 /h。
K n Is determined by the following method:
(1)K n first pre-fetching the value K n-1 ，K n The number of hydrogen purification device groups, K, to be started for the next stage preset time node n-1 The number of hydrogen purification device groups to be started for the current preset time node.
(2) Calculating R n ＝(ΣY m )/J n . Wherein Y is m For the optimal product gas flow during purification operation of the hydrogen purification unit group numbered m, Y m The corresponding hydrogen purification device group is taken from group C and Y m The number of the corresponding hydrogen purification device groups is K n-1 . The following judgment is made:
when R is n At > 1, R is calculated sequentially (n+i) At this time Y m Taken from group C and Y m The number of the values is K n-1 -i, i is a positive integer starting from 1. To R (n+i) Stopping calculation when the value is less than 1, wherein K n Take the value K n-1 -i+1 as final output K n . The hydrogen purification device group selected in the i-1 th group is the hydrogen purification device group filled with the blank group A in the step S3.
When R is n When less than 1, R is calculated in turn (n+i) At this time Y m Taken from group C and Y m The number of the values is K n-1 +i, i is a positive integer starting from 1. To R (n+i) Stopping the calculation when > 1, at this time K n Take the value K n-1 +i as final output K n . The hydrogen purification device group selected in the i-th group is the hydrogen purification device group filled with the blank group a in step S3.
At this time, the Q m The corresponding hydrogen purification device group is the Y m The same hydrogen purification unit set as the corresponding hydrogen purification unit set.
Also exemplified by a recycle purification system comprising 8 hydrogen purification device sets, the list is as follows:
K n-1 2, at this time:
(1)K n first the value 2 is prefetched.
(2) During the current period, group C includes: y is Y 3 To Y 8 Group, ym takes Y 3 And Y 4 Two groups, calculate R n ＝(ΣY m )/J n = (197+201)/376=1.06 > 1. The following judgment is made:
due to R n At > 1, R is therefore calculated first (n+i) ＝(ΣY m )/J n At this time Y m Taken from group C and Y m The number of the values is K n-1 -i＝K n-1 -1=1 group, thus selecting Y 3 Group calculation, obtaining: r is R (n+i) = (197)/376 = 0.52 < 1, stop calculating R (n+i) At this time K n Take the value K n-1 -i+1=2-1+1=2. Thus finally choose Y 3 And Y 4 Two groups were used as hydrogen purification device groups filled with blank group a.
When the prior art adopts two sets of separation and purification systems, the control end only needs to carry out staggered control. The invention adopts modularized and standardized hydrogen purification device groups, and the hydrogen purification device groups which are connected into the working mode at each time can be more than one group, so the invention provides an analysis control method for intelligently regulating the quantity of the hydrogen purification device groups which are connected into the working mode. Meanwhile, the concentration of hydrogen in the separated and purified product gas is not obviously reduced due to exceeding the working limit of the hydrogen purification device group.
Example 5
A hydrogen purification system with auto-tuning capability, L, as described in example 4 n The following analysis and judgment process is also needed: comprising the following steps: k (K) n First pre-fetching the value K n-1 ，K n The number of hydrogen purification device groups, K, to be started for the next stage preset time node n-1 The hydrogen purification device group number which is started for the current preset time node is determined, and the L is determined n Whether or not to meet L 0 ≤L n ≤L 1 Wherein L is 0 For minimum duration, L 1 Is the maximum duration:
when L n Satisfy L 0 ≤L n ≤L 1 When K is n Take the value K n-1 。
When L n ＞L 1 At this time, a set of deductions with the smallest value is selected from Qm, and L is recalculated n The method comprises the steps of carrying out a first treatment on the surface of the Circulating the above steps to L n ≤L 1 。
When L n ＜L 0 When the hydrogen purifying device group of S groups is selected from the group C to form K n +S group hydrogen purification device group based on K n New L is calculated in +S group hydrogen purification device group n And (3) the method. S is a positive integer from 1, L n The calculation is carried out according to the value sequence of S to L n `＞L 0 Stopping and judging:
when K is n K when +S > N n Take the value K n +S-1, and gives an overrun alarm to the user.
When K is n K when +S is less than or equal to N n Take the value K n +S。
And finally, the selected all hydrogen purification device groups are the hydrogen purification device groups filled with blank groups A in the step S3.
Also exemplified by a recycle purification system comprising 8 hydrogen purification device sets, the list is as follows:
K n first pre-fetching the value K n-1 During the current period, group C includes: q (Q) 3 To Q 8 Group, qm takes Q 3 And Q 4 Two groups, calculated: l (L) n ＝(ΣQ m )/J n ＝(Q 3+ Q 4 )/J n = (986+1007)/376=5.3 h. And judge the L n Whether or not to meet L 0 ≤L n ≤L 1 Wherein L is 0 For minimum duration, L 1 Is the maximum duration:
for example: l (L) 0 Taking for 5 hours, L 1 Take 6 hours. At this time, L n Satisfy L 0 ≤L n ≤L 1 ，K n Take the value 2.
For example: l (L) 0 Taking 3 hours, L 1 Take 4 hours. At this time, L n ＞L 1 When deducting Q 3 Group, recalculate L n ＝(Q 4 )/J n ＝(1007)/376＝2.7h，L n ＜L 1 。
For example: l (L) 0 Taking for 6 hours, L 1 Take 8 hours. At this time, L n ＜L 0 When the hydrogen purification device group C is selected from 1 more hydrogen purification device groups to form 2+1=3 hydrogen purification device groups (the newly added group is Q 5 Group), calculate a new L n `＝(Q 3 +Q 4 +Q 5 )/J n = (986+1007+1008)/376 = 7.98. At this time L n `＞L 0 Stopping and judging:
when K is n +s=2+1=3=n (N is 3), K n The value is 3.
Finally selected Q 3 、Q 4 、Q 5 The hydrogen purification device group is a hydrogen purification device group filled with blank group A in S3.
Each hydrogen purification device group has an optimal operating time. This is because the operating time of the hydrogen purification unit set is too short to account for: the processing capacity of the hydrogen purification unit may not be fully utilized, or the flow of gas through the hydrogen purification unit may be excessive, in connection with the present invention with respect to K n The analysis control method of (2) can basically eliminate the problem of excessive air flow of the hydrogen purification device group, thereby improving the efficiency by reducing the number of the hydrogen purification device groups The operating time of the hydrogen purification device group is remained, and the processing capacity of the hydrogen purification device group is fully utilized. The long working time can lead to the overload operation state of the hydrogen purification device group at the later stage, on the one hand, the separation and purification effect can be poor, and the increase of the unqualified product gas can be caused. On the other hand, overload operation of the hydrogen purification unit can also cause damage to the service life of the apparatus.
The invention controls the time length L of each control period n The analysis control of the optimal time length is carried out, and the working time length L of the hydrogen purification device group in each control period can be made by the analysis control n Are in the optimal range, thereby eliminating the above-mentioned problems. Meanwhile, the control of the upstream system is introduced in the analysis control of the optimal time length, so that the air supply quantity of the upstream system can be timely reduced when the air supply of the upstream system exceeds the load of the circulating purification system. Or when the air supply of the upstream system is insufficient, the air supply quantity of the upstream system is timely improved, and the yield is stabilized while the qualified rate of the product air is ensured.
In group C, according to one embodiment of the present invention, the rank E is formed with the number of times of day history regenerations ranging from high to low. And selecting the hydrogen purification device group from the group C or adding the selected hydrogen purification device group, and selecting according to the sequence of the sequence E to form a sequence P. And when the selected hydrogen purification device group is reduced, selecting in the reverse direction from the sequencing P.
According to one embodiment of the present invention, when the hydrogen purification device group is selected to fill the blank group B, the hydrogen purification device group of group D is preferentially selected to fill, and if the number of hydrogen purification device groups of group D is insufficient, the hydrogen purification device group is reversely selected from the order E to fill until the blank group B is filled, and then the regeneration control group G is obtained.
When the method is adopted to increase the hydrogen purification device groups of the working group, the hydrogen purification device group with more regeneration times can be preferentially selected. When the hydrogen purification device groups of the working group are reduced, the hydrogen purification device group with less regeneration times can be selected from the selected working groups preferentially. The analysis control method can balance the regeneration times of the hydrogen purification device groups once when the hydrogen purification device groups of the working groups are regulated each time, so that each hydrogen purification device group in the circulating purification system can balance the working state of equipment in the working process, and balance the equipment loss, thereby being convenient for uniformly maintaining and managing the hydrogen purification device groups.
Example 6
The hydrogen purification system with auto-tuning capability of embodiment 4, wherein the next-stage preset time node information comprises: time period information T n Information K on the number of hydrogen purification device groups to be activated in operation mode n And (c) wherein:
T n the starting time point of' is the current preset time node T n-1 T at the final time point of (2) n Duration L of n The following are satisfied: l (L) n ``＝W 1 *L n Wherein W is 1 For the first adjustment coefficient, the value is 0.9 to or less than W 1 ＜1.0。
K n `＝W 2 *K n Wherein W is 2 For the second adjustment coefficient, the value is 1.0 < W 2 ≤1.2。
After the first adjustment coefficient and the second adjustment coefficient are increased, the working time of the hydrogen purification device group can be properly shortened, and the number of the working groups of the hydrogen purification device group can be properly increased, so that the working strength of each hydrogen purification device group is reduced to a certain extent, and the service life of the hydrogen purification device group is properly prolonged.
According to one embodiment of the invention, when 4 or more hydrogen purification device sets are employed to construct a cyclic purification system, the following first cyclic line control system may be employed: an input branch pipe 29 connecting the inlet end of each third separator 7 and the input header pipe 24, a first communicating pipe group 30 communicating the input branch pipes 29 with each other; the input branch pipe 29 is provided with a first electric control switch valve on a pipeline between the first communicating pipe group 30 and the input main pipe 24, and the first communicating pipe group 30 is provided with a second electric control switch valve for controlling the communicating relation; the input branch 29 is provided with a sixth electrically controlled on-off valve on the conduit between the first communicating tube group 30 and the third separator 7. At this time, the hydrogen purification device group of the target group can be switched into the working mode, the regeneration purification mode and the off-line mode by controlling the switching relationship of the first electrically controlled switching valve and the sixth electrically controlled switching valve on each input branch pipe 29 and each second electrically controlled switching valve on the first communicating pipe group 30. The offline mode is: a non-working, non-regenerating purified hydrogen purification unit.
It should be noted and understood that various modifications and improvements could be made to the invention as described in detail above without departing from the spirit and scope of the invention as claimed. Accordingly, the scope of the claimed subject matter is not limited by any particular exemplary teachings presented.

Claims (8)

1. A hydrogen purification system with automatic regulation capability, comprising: a cyclic purification system and a cyclic purification control system; the cyclic purification system includes: -an input manifold (24), an output manifold (25), and-at least 3 hydrogen purification device groups connected between the input manifold (24) and the output manifold (25); each hydrogen purification device group comprises a plurality of hydrogen purification devices which are connected in sequence: the device comprises a third separator (7), a second cooler (6) and an adsorption tower (5), wherein the inlet end of the third separator (7) is communicated with an input main pipe (24) through a first circulating pipeline control system, and the outlet end of the adsorption tower (5) is communicated with an output main pipe (25) through a second circulating pipeline control system;
the first circulation line control system includes: an input branch pipe (29) connecting the inlet end of each third separator (7) and the input header pipe (24), a first communicating pipe group (30) communicating the input branch pipes (29) with each other; the input branch pipe (29) is provided with a first electric control switch valve on a pipeline between the first communicating pipe group (30) and the input main pipe (24), and the first communicating pipe group (30) is provided with a second electric control switch valve for controlling the communication relation;
The second circulation line control system includes: an output branch pipe (31) connecting the outlet end of the adsorption tower (5) and the output main pipe (25); the output branch pipe (31) is provided with a second electric control three-way valve, the inlet end of the second electric control three-way valve is communicated with the outlet end of the adsorption tower (5), one outlet end is communicated with the output main pipe (25), and the other outlet end is communicated with the inlet end of the third electric control three-way valve; one outlet end of the third electric control three-way valve is communicated with the first circulating pipe (32), and the other outlet end of the third electric control three-way valve is communicated with the second circulating pipe (33); the first circulating pipe (32) is communicated with the output main pipe (25) through a connecting pipe (10), and a fourth electric control switch valve (9) is arranged on the connecting pipe (10); the second circulating pipe (33) is communicated with the output main pipe (25);
the cyclic purification control system includes: the signal connection module and the analysis control module; one end of the signal connection module is respectively connected with the first electric control switch valve, the second electric control three-way valve, the third electric control three-way valve and the fourth electric control switch valve (9) in a signal manner, and the other end of the signal connection module is connected with the analysis control module in a signal manner; the analysis control module is subjected to regeneration analysis, and based on a regeneration analysis result, a signal connection module is used for sending control instructions to a first electric control switch valve, a second electric control three-way valve, a third electric control three-way valve and a fourth electric control switch valve (9) so that at least 1 group of at least 3 groups of hydrogen purification device groups is in a working mode, and the rest groups start a regeneration mode according to requirements;
The regeneration analysis includes:
s1, selecting all hydrogen purification device groups which are not in a working mode at present, and marking the group which is controlled to be a regeneration mode at the last time as a group C; selecting all hydrogen purification device groups currently in a working mode, and marking the hydrogen purification device groups as a group D;
s2, acquiring current time information, comparing the current time information with the node information of the preset time of the next stage when the current time information is positioned in the preset time period at the tail end of the current time node, judging the number of hydrogen purification device groups which should start a working mode of the next stage, establishing a blank group A, establishing the number of hydrogen purification device groups which should start a regeneration mode, and establishing a blank group B; the number of the hydrogen purification device groups in the blank group A is less than or equal to the number of the hydrogen purification device groups in the blank group B, and the sum of the number of the hydrogen purification device groups in the blank group A and the blank group B is less than the total number X of the hydrogen purification device groups;
s3, selecting a hydrogen purification device group from the group C to fill the blank group A to obtain a work control group F; selecting a hydrogen purification device group from the group D to fill the blank group B to obtain a regeneration control group G;
s4, selecting at least 1 hydrogen purification device group which is not in the working control group F, the regeneration control group G and the group D as a regenerated gas purification group H;
S5, forming a control instruction set for each electric control valve in the first circulation pipeline control system and the second circulation pipeline control system according to the working control group F, the regeneration control group G and the regeneration gas purification group H, wherein the control instruction set is the regeneration analysis result;
the next-stage preset time node information comprises: time period information T n Information K on the number of hydrogen purification device groups to which the operating mode should be activated n Wherein:
T n the starting time point of (1) is the current preset time node T n-1 T at the final time point of (2) n Length of time L of (2) n The method meets the following conditions: l (L) n ＝(ΣQ m )/J n ，J n For the current hydrogen flow rate of the input circulating purification system, Q m For the preset maximum throughput, Q, of the purification operation of the hydrogen purification unit group numbered m m The corresponding hydrogen purification device groups are taken from groups C and Q m The number of the corresponding hydrogen purification device groups is K n ；
K n Is a positive integer and is 1 to less than or equal to K n N is less than or equal to the maximum number of hydrogen purification device groups capable of starting the working mode, and N is less than (1/2) X.
2. The hydrogen purification system with automatic regulation capability according to claim 1, wherein between the input manifold (24) and the hydrogen outlet end of the gas-liquid separation system, along the gas flow direction, there are sequentially: the device comprises a first separator (1), a deoxidizing tower (2), a first cooler (3) and a second separator (4).
3. The hydrogen purification system with automatic regulation capability according to claim 1, wherein a hydrogen concentration detector is installed on the output main pipe (25), the tail end of the output main pipe (25) is communicated with the input end of a first electric control three-way valve (20), one outlet end of the first electric control three-way valve (20) is communicated with a qualified product gas pipe, and the other outlet end of the first electric control three-way valve is communicated with a disqualified product gas discharge pipe; the signal output end of the hydrogen concentration detector is in signal connection with the control end of the first electric control three-way valve (20).
4. The hydrogen purification system with auto-tuning capability as recited in claim 1, wherein K n Is determined by the following method:
(1)K n first pre-fetching the value K n-1 ，K n The number of hydrogen purification device groups, K, to be started for the next stage preset time node n-1 The number of hydrogen purification device groups to be started for the current preset time node;
(2) Calculating R n ＝(ΣY m )/J n The method comprises the steps of carrying out a first treatment on the surface of the Wherein Y is m For the optimal product gas flow during purification operation of the hydrogen purification unit group numbered m, Y m The corresponding hydrogen purification device group is taken from group C and Y m The number of the corresponding hydrogen purification device groups is K n-1 The method comprises the steps of carrying out a first treatment on the surface of the The following judgment is made:
when R is n At > 1, R is calculated sequentially (n+i) At this time Y m Taken from group C and Y m The number of the values is K n-1 -i, i is a positive integer starting from 1; to R (n+i) Stopping calculation when the value is less than 1, wherein K n Take the value K n-1 -i+1 as final output K n The method comprises the steps of carrying out a first treatment on the surface of the The hydrogen purification device group selected in the i-1 th group is the hydrogen purification device group filled with the blank group A in the step S3;
when R is n When less than 1, R is calculated in turn (n+i) At this time Y m Taken from group C and Y m The number of the values is K n-1 +i, i is a positive integer starting from 1; to R (n+i) Stopping the calculation when > 1, at this time K n Take the value K n-1 +i as final output K n The method comprises the steps of carrying out a first treatment on the surface of the The hydrogen purification device group selected in the ith group is the hydrogen purification device group filled with the blank group A in the step S3;
at this time, the Q m The corresponding hydrogen purification device group is the Y m The same hydrogen purification unit set as the corresponding hydrogen purification unit set.
5. The hydrogen purification system with auto-tuning capability as recited in claim 1, wherein K n First pre-fetching the value K n-1 ，K n The number of hydrogen purification device groups, K, to be started for the next stage preset time node n-1 The number of hydrogen purification device groups to be started for the current preset time node; and judge the L n Whether or not to meet L 0 ≤L n ≤L 1 Wherein L is 0 For minimum duration, L 1 Is the maximum duration:
when L n Satisfy L 0 ≤L n ≤L 1 When K is n Take the value K n-1 ；
When L n ＞L 1 At the time from Q m Selecting a group of deductions with the smallest value, and recalculating L n The method comprises the steps of carrying out a first treatment on the surface of the Circulating the above steps to L n ≤L 1 ；
When L n ＜L 0 When the hydrogen purifying device group of S groups is selected from the group C to form K n +S group hydrogen purification device group based on K n New L is calculated in +S group hydrogen purification device group n And (2) a step of performing; s is a positive integer from 1, L n The calculation is carried out according to the value sequence of S to L n `＞L 0 Stopping and judging:
when K is n K when +S > N n Take the value K n +S-1, and giving out an overrun alarm to the user;
when K is n K when +S is less than or equal to N n Take the value K n +S；
And finally, the selected all hydrogen purification device groups are the hydrogen purification device groups filled with blank groups A in the step S3.
6. The hydrogen purification system with auto-tuning capability according to any one of claims 4 or 5, wherein in group C, rank E is formed with the number of times of day history regenerations ranging from high to low; selecting a hydrogen purification device group from the group C or adding the selected hydrogen purification device group, and selecting according to the sequence of the sequence E to form a sequence P; and when the selected hydrogen purification device group is reduced, selecting in the reverse direction from the sequencing P.
7. The hydrogen purification system with auto-tuning capability according to claim 6, wherein when the hydrogen purification device group is selected to fill blank group B, the hydrogen purification device group of group D is preferentially selected to fill, and if the number of hydrogen purification device groups of group D is insufficient, the hydrogen purification device group is reversely selected from the order E to fill until blank group B is filled, and then the regeneration control group G is obtained.
8. The hydrogen purification system with auto-tuning capability of claim 1, wherein the next stage preset time node information comprises: time period information T n Information K on the number of hydrogen purification device groups to be activated in operation mode n And (c) wherein:
T n the starting time point of' is the current preset time node T n-1 T at the final time point of (2) n Duration L of n The following are satisfied: l (L) n ``＝W 1 *L n Wherein W is 1 For the first adjustment coefficient, the value is 0.9 to or less than W 1 ＜1.0；
K n `＝W 2 *K n Wherein W is 2 For the second adjustment coefficient, the value is 1.0 < W 2 ≤1.2。
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CN201776068U (en) * 2010-08-23 2011-03-30 杭州普菲科空分设备有限公司 Isopiestic pressure purification drying system with no regeneration gas loss
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CN111482050A (en) * 2020-06-15 2020-08-04 上海优华系统集成技术股份有限公司 Hydrogen purification device and method
CN112516762A (en) * 2020-12-24 2021-03-19 阳光电源股份有限公司 Purification system for variable power hydrogen production and control method thereof
CN216878638U (en) * 2021-10-30 2022-07-05 无锡隆基氢能科技有限公司 Hydrogen purification system and water electrolysis hydrogen production system
CN217025345U (en) * 2021-12-30 2022-07-22 江苏国富氢能技术装备股份有限公司 Hydrogen or oxygen purification system
CN217431285U (en) * 2022-06-24 2022-09-16 四川亚联高科技股份有限公司 Purification system of product gas after water electrolysis

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201776068U (en) * 2010-08-23 2011-03-30 杭州普菲科空分设备有限公司 Isopiestic pressure purification drying system with no regeneration gas loss
CN102039083A (en) * 2010-08-23 2011-05-04 杭州普菲科空分设备有限公司 Isotonic purifying and drying system without resurgent gas loss and technological process thereof
CN111482050A (en) * 2020-06-15 2020-08-04 上海优华系统集成技术股份有限公司 Hydrogen purification device and method
CN112516762A (en) * 2020-12-24 2021-03-19 阳光电源股份有限公司 Purification system for variable power hydrogen production and control method thereof
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