Drainage control method for hydrogen purification system, controller and hydrogen purification system

Abstract

The invention provides a drainage control method for a hydrogen purification system, a controller and the hydrogen purification system.The drainage control method comprises the steps that whether the liquid level in a drainer is not higher than the preset lowest liquid level or not is judged according to the detection result of a liquid level detector, and if not, a main drainage valve is controlled to be in a closed state; and the drying drainage valve, the deoxidation drainage valve and the crude hydrogen drainage valve are sequentially controlled to be in an open state. In this way, all the drainage valves are opened according to the sequence from low pressure to high pressure, the situation that high pressure changes into low pressure can be avoided, and the problem of unsmooth drainage is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production by electrolyzing water, and particularly relates to a drainage control method, a controller and a hydrogen purification system for a hydrogen purification system. Background Art

[0002] As a new type of energy, hydrogen energy has the characteristics of diverse sources, clean, low-carbon, flexible and efficient, and can be widely used in the fields of energy, transportation, industry, construction, etc.

[0003] Hydrogen production by electrolyzing water is an important hydrogen production method. The principle is to decompose water into hydrogen and oxygen through electric energy. This process does not involve any combustion reaction, so no harmful gas emissions are generated, meeting the requirements of clean environmental protection. In addition, high-purity hydrogen can be obtained by electrolyzing water and can be directly used in applications such as fuel cells with a little purification. Since hydrogen production by electrolyzing water can be combined with renewable energy (such as solar energy and wind energy), by converting renewable energy into hydrogen for storage and utilization, the sustainable utilization of energy is realized. Therefore, it plays an important role in energy transformation and addressing climate change. And the hydrogen purification system is a key system in the post-treatment stage of the entire hydrogen production by electrolyzing water.

[0004] In the prior art, in the drainage process of the hydrogen purification system, generally, the outlet end of the equipment in the hydrogen purification system that needs to be drained is directly connected to the drain outlet to achieve drainage. However, since the pressures corresponding to the equipment and pipelines at different positions in the hydrogen purification system are different, this drainage method is prone to the risk of high-pressure surging into low-pressure areas. Summary of the Invention

[0005] The purpose of the present invention is to provide a drainage control method, a controller and a hydrogen purification system for a hydrogen purification system to solve the technical problem that high-pressure surging into low-pressure areas easily occurs during drainage in the hydrogen purification system in the prior art.

[0006] To achieve the above purpose, the first aspect of the present application provides a drainage control method for a hydrogen purification system. The hydrogen purification system includes a raw hydrogen water separator, a deoxygenated water separator, at least one dry gas water separator and a drainer; the raw hydrogen water separator is connected to the drainer through a raw hydrogen drainage pipeline, and a raw hydrogen drainage valve is arranged on the raw hydrogen drainage pipeline; the deoxygenated water separator is connected to the drainer through a deoxygenated drainage pipeline, and a deoxygenated drainage valve is arranged on the deoxygenated drainage pipeline; the at least one dry gas water separator is connected to the drainer through a dry drainage pipeline, and a dry drainage valve is arranged on the dry drainage pipeline; a total drainage valve is arranged on the pipeline between the drainer and the water outlet; the hydrogen purification system further includes a liquid level detector for detecting the liquid level in the drainer; the method includes:

[0007] Based on the detection result of the liquid level detector, determine whether the liquid level in the drainer is not higher than a preset minimum liquid level;

[0008] If it is not higher than the preset minimum liquid level, control the total drain valve to be in a closed state, and sequentially control the dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in an open state.

[0009] Optionally, the method further includes:

[0010] If it is higher than the preset minimum liquid level, determine whether the liquid level in the drainer reaches a preset maximum liquid level;

[0011] If it reaches the preset maximum liquid level, control the dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in a closed state, and control the total drain valve to be in an open state.

[0012] Optionally, the at least one dry gas-water separator includes a first dry gas-water separator, a second dry gas-water separator, and a third dry gas-water separator. Among them, the first dry gas-water separator, the second dry gas-water separator, and the third dry gas-water separator are arranged in order from far to near according to their distances from the crude hydrogen inlet; a first dry drain valve is provided between the first dry gas-water separator and the drainer, a second dry drain valve is provided between the second dry gas-water separator and the drainer, and a third dry drain valve is provided between the third dry gas-water separator and the drainer;

[0013] If it is not higher than the preset minimum liquid level, controlling the total drain valve to be in a closed state and sequentially controlling the dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in an open state includes:

[0014] If it is not higher than the preset minimum liquid level, control the total drain valve to be in a closed state, and sequentially control the first dry drain valve, the second dry drain valve, the third dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in an open state.

[0015] Optionally, if it reaches the preset maximum liquid level, controlling the dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in a closed state and controlling the total drain valve to be in an open state includes:

[0016] If it reaches the preset maximum liquid level, control the first dry drain valve, the second dry drain valve, the third dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in a closed state, and control the total drain valve to be in an open state.

[0017] Optionally, the preset minimum liquid level is higher than the bottom of the drainer.

[0018] In a second aspect, a drain controller provided by an embodiment of the present application for a hydrogen purification system, the hydrogen purification system includes a raw hydrogen water separator, a deoxygenated water separator, at least one dry gas water separator and a drainer; the raw hydrogen water separator is connected to the drainer through a raw hydrogen drain pipe, and a raw hydrogen drain valve is provided on the raw hydrogen drain pipe; the deoxygenated water separator is connected to the drainer through a deoxygenated drain pipe, and a deoxygenated drain valve is provided on the deoxygenated drain pipe; the at least one dry gas water separator is connected to the drainer through a dry drain pipe, and a dry drain valve is provided on the dry drain pipe; a total drain valve is provided on the pipe between the drainer and the water outlet; the hydrogen purification system further includes a liquid level detector and a controller, the liquid level detector is used to detect the level of the liquid in the drainer; the controller includes:

[0019] A judgment control module, configured to judge whether the liquid level in the drainer is not higher than a preset minimum liquid level according to the detection result of the liquid level detector;

[0020] A drain control module, configured to, if it is not higher than the preset minimum liquid level, control the total drain valve to be in a closed state, and sequentially control the dry drain valve, the deoxygenated drain valve and the raw hydrogen drain valve to be in an open state.

[0021] Optionally, the judgment control module is further configured to:

[0022] If it is higher than the preset minimum liquid level, judge whether the liquid level in the drainer reaches a preset maximum liquid level;

[0023] The drain control module is further configured to, if it reaches the preset maximum liquid level, control the dry drain valve, the deoxygenated drain valve and the raw hydrogen drain valve to be in a closed state, and control the total drain valve to be in an open state.

[0024] Optionally, the at least one dry gas water separator includes a first dry gas water separator, a second dry gas water separator and a third dry gas water separator, wherein the first dry gas water separator, the second dry gas water separator and the third dry gas water separator are arranged in order from far to near according to their distances from the raw hydrogen inlet; a first dry drain valve is provided between the first dry gas water separator and the drainer, a second dry drain valve is provided between the second dry gas water separator and the drainer, and a third dry drain valve is provided between the third dry gas water separator and the drainer;

[0025] The drainage control module is specifically configured to:

[0026] If it is not higher than the preset lowest liquid level, control the total drainage valve to be in the closed state, and sequentially control the first dry drainage valve, the second dry drainage valve, the third dry drainage valve, the deoxidized water drainage valve, and the crude hydrogen drainage valve to be in the open state.

[0027] Optionally, the drainage control module is specifically configured to:

[0028] If it reaches the preset highest liquid level, control the first dry drainage valve, the second dry drainage valve, the third dry drainage valve, the deoxidized water drainage valve, and the crude hydrogen drainage valve to be in the closed state, and control the total drainage valve to be in the open state.

[0029] Optionally, the preset lowest liquid level is higher than the bottom of the drainer.

[0030] In a third aspect, an embodiment of the present application provides a hydrogen purification system, which includes a crude hydrogen water separator, a deoxidized water separator, at least one dry gas water separator, and a drainer; the crude hydrogen water separator is connected to the drainer through a crude hydrogen drainage pipeline, and a crude hydrogen drainage valve is arranged on the crude hydrogen drainage pipeline; the deoxidized water separator is connected to the drainer through a deoxidized water drainage pipeline, and a deoxidized water drainage valve is arranged on the deoxidized water drainage pipeline; the at least one dry gas water separator is connected to the drainer through a dry drainage pipeline, and a dry drainage valve is arranged on the dry drainage pipeline; a total drainage valve is arranged on the pipeline between the drainer and the water outlet; the hydrogen purification system further includes a liquid level detector and a drainage controller;

[0031] The liquid level detector is used to detect the level of the liquid in the drainer;

[0032] The drainage controller is configured to judge whether the liquid level in the drainer is not higher than a preset lowest liquid level according to the detection result of the liquid level detector; if it is not higher than the preset lowest liquid level, control the total drainage valve to be in the closed state, and sequentially control the dry drainage valve, the deoxidized water drainage valve, and the crude hydrogen drainage valve to be in the open state.

[0033] In a fourth aspect, an embodiment of the present application provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the method as described above when executing the computer program.

[0034] Fifth aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program, and when the computer program is executed by a processor, the method described above is implemented.

[0035] Compared with the prior art, the present application provides a drainage control method for a hydrogen purification system. According to the detection result of a liquid level detector, it is determined whether the liquid level in the drainer is not higher than a preset minimum liquid level. If it is not higher than the preset minimum liquid level, the total drain valve is controlled to be in a closed state, and the drying drain valve, the deoxidation drain valve, and the raw hydrogen drain valve are sequentially controlled to be in an open state. In this way, by opening each drain valve in the order from low pressure to high pressure, the situation of high pressure leaking to low pressure can be avoided, effectively improving the problem of poor drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of a hydrogen purification system provided by an embodiment of the present application;

[0037] Figure 2 is a schematic flowchart corresponding to a drainage control method for a hydrogen purification system provided by another embodiment of the present application;

[0038] Figure 3 is a schematic structural diagram of another hydrogen purification system provided by an embodiment of the present application;

[0039] Figure 4 is a schematic flowchart corresponding to another drainage control method for a hydrogen purification system provided by another embodiment of the present application;

[0040] Figure 5 is a schematic structural diagram of a drainage controller for a hydrogen purification system provided by another embodiment of the present application.

[0041] Among them, the Figures 1 to 5 description of the reference numerals in the attached

[0042] 111 - First drying tower; 112 - Second drying tower; 113 - Third drying tower; 120 - Raw hydrogen water separator; 130 - Deaerator; 140 - Deoxidation cooler; 150 - Deoxygenated water separator; 160 - Drying cooler; 161 - First drying cooler; 162 - Second drying cooler; 163 - Third drying cooler; 170 - Dry gas water separator; 171 - First dry gas water separator; 172 - Second dry gas water separator; 173 - Third dry gas water separator; 180 - Drainer; 191 - Raw hydrogen drain valve; 192 - Deoxidation drain valve; 193 - Drying drain valve; 1931 - First drying drain valve; 1932 - Second drying drain valve; 1933 - Third drying drain valve; 194 - Total drain valve. Detailed implementation manners

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0044] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances for the embodiments of the present application described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0045] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation or be constructed and operated in a specific orientation.

[0046] The positional relationships such as "parallel" or "perpendicular" not only include the completely "parallel" or "perpendicular" positional relationships, but also include the positional relationships with an angular deviation within a preset deviation range relative to the completely "parallel" or "perpendicular" ones.

[0047] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.

[0048] In addition, the terms "installed", "set up", "provided with", "connected", "linked", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to Figures 1 to 5 and describe this application in detail in combination with the embodiments.

[0050] At present, there are two working modes for the mainstream hydrogen purification systems on the market. One is the two-tower switching mode, that is, the hydrogen purification system includes two drying towers. One drying tower is used for hydrogen drying and is in the main working state, called the main drying tower, and the other drying tower is used for the regeneration of the molecular sieve in the tower and is in the regeneration state, called the regeneration drying tower. The other is the three-tower switching mode, that is, the hydrogen purification system includes three drying towers. The first drying tower is used for hydrogen drying and is in the main working state, called the main drying tower, the second drying tower is used for the regeneration of the molecular sieve in the tower and is in the regeneration working state, called the regeneration drying tower, and the third drying tower is used for drying the hydrogen coming out of the regeneration drying tower and is in the secondary working state, called the secondary drying tower. At present, the three-tower switching mode is the working mode of the mainstream hydrogen purification system.

[0051] The following takes the three-tower switching mode as an example and combines Figure 1 with the structural schematic diagram of the hydrogen purification system shown in

[0052] As Figure 1 shown, the hydrogen purification system includes three drying towers (the first drying tower 111, the second drying tower 112, and the third drying tower 113 respectively), a crude hydrogen water separator 120, a deaerator 130, a deoxidation cooler 140, a deoxygenated water separator 150, at least one drying cooler (such as Figure 1 the drying cooler 160 shown in Figure 1The dry gas-water separator 170 and the drainer 180 shown in [figure]. Among them, the crude hydrogen gas-water separator 120 is connected to the drainer 180 through a crude hydrogen drainage pipeline, and a crude hydrogen drainage valve 191 is provided on the crude hydrogen drainage pipeline; the deoxygenated gas-water separator 150 is connected to the drainer 180 through a deoxygenated drainage pipeline, and a deoxygenated drainage valve 192 is provided on the deoxygenated drainage pipeline; the dry gas-water separator 170 is connected to the drainer 180 through a dry drainage pipeline, and a dry drainage valve 193 is provided on the dry drainage pipeline; a main drainage valve 194 is provided on the pipeline between the drainer 180 and the water outlet. The on-off of the crude hydrogen drainage pipeline is controlled by the on-off of the crude hydrogen drainage valve 191, the on-off of the deoxygenated drainage pipeline is controlled by the on-off of the deoxygenated drainage valve 192, the on-off of the dry drainage pipeline is controlled by the on-off of the dry drainage valve 193, and the on-off of the pipeline between the drainer 180 and the water outlet is controlled by the on-off of the main drainage valve 194.

[0053] In addition, the hydrogen purification system further includes a liquid level detector ( Figure 1 not shown in [figure]), and the liquid level detector is used to detect the level of the liquid in the drainer 180.

[0054] Based on Figure 1 the hydrogen purification system shown in [figure], as Figure 2 shown, the present application embodiment also provides a schematic flow chart corresponding to a drainage control method for a hydrogen purification system, specifically including the following steps S201 to S204:

[0055] S201, according to the detection result of the liquid level detector, judge whether the liquid level in the drainer 180 is not higher than a preset minimum liquid level. If it is not higher than the preset minimum liquid level, then execute S202; otherwise, execute S203.

[0056] Furthermore, the preset minimum liquid level can be higher than the bottom of the drainer 180, so that a certain amount of liquid is stored in the drainer 180 during the drainage process, thereby minimizing the external discharge of products and reducing product waste.

[0057] S202, control the main drainage valve 194 to be in a closed state, and sequentially control the dry drainage valve 193, the deoxygenated drainage valve 192, and the crude hydrogen drainage valve 191 to be in an open state.

[0058] In the embodiments of the present application, there are two possible situations where the liquid level in the drainer 180 is not higher than the preset minimum liquid level. One situation is that when the hydrogen purification system starts working for the first time, the drainer 180 is generally in an empty state, so the liquid level in the drainer 180 is generally lower than the preset minimum liquid level. Another situation is that during the operation of the hydrogen purification system, when the drainer 180 discharges a certain amount of internal liquid, the liquid level in the drainer 180 reaches the preset minimum liquid level. In any of the above two cases, the above step S202 can be executed.

[0059] Further, the process of sequentially controlling the drying drain valve 193, the deoxidizing drain valve 192, and the raw hydrogen drain valve 191 to be in the open state can be to open the drying drain valve 193, the deoxidizing drain valve 192, and the raw hydrogen drain valve 191 in sequence. Considering that each device requires a certain time to drain water, the deoxidizing drain valve 192 can be opened after waiting for a preset duration after opening the drying drain valve 193, and the raw hydrogen drain valve 191 can be opened after waiting for another preset duration.

[0060] It should be noted that the preset duration can be determined according to the drainage volume and the pipe diameter. For example, the preset duration can be set to 1 - 5 minutes, and the specific value is not limited.

[0061] S203, determine whether the liquid level in the drainer 180 reaches the preset maximum liquid level. If it reaches the preset maximum liquid level, execute S204; otherwise, return to S201.

[0062] S204, control the drying drain valve 193, the deoxidizing drain valve 192, and the raw hydrogen drain valve 191 to be in the closed state, and control the total drain valve 194 to be in the open state.

[0063] Compared with the prior art, the present application provides a drainage control method for a hydrogen purification system. According to the detection result of the liquid level detector, it is determined whether the liquid level in the drainer is not higher than the preset minimum liquid level. If it is not higher than the preset minimum liquid level, the total drain valve is controlled to be in the closed state, and the drying drain valve, the deoxidizing drain valve, and the raw hydrogen drain valve are sequentially controlled to be in the open state. In this way, by opening each drain valve in the order from low pressure to high pressure, the situation of high - pressure flowing into low - pressure can be avoided, and the problem of poor drainage can be effectively improved.

[0064] It should be noted that Figure 1 It shows that three drying towers share a set of gas - water separation equipment. In other possible implementation manners, each drying tower can be configured with a set of gas - water separation equipment.

[0065] Such as Figure 3As shown, the hydrogen purification system includes three drying towers (the first drying tower 111, the second drying tower 112, and the third drying tower 113), a crude hydrogen water separator 120, a deaerator 130, a deoxidation cooler 140, a deoxygenated water separator 150, three drying coolers (the first drying cooler 161, the second drying cooler 162, and the third drying cooler 163), at least one dry gas water separator (the first dry gas water separator 171, the second dry gas water separator 172, and the third dry gas water separator 173), and a drainer 180.

[0066] Among them, the crude hydrogen water separator 120 is connected to the drainer 180 through a crude hydrogen drain pipe, and a crude hydrogen drain valve 191 is provided on the crude hydrogen drain pipe; the deoxygenated water separator 150 is connected to the drainer 180 through a deoxygenated drain pipe, and a deoxygenated drain valve 192 is provided on the deoxygenated drain pipe; a main drain valve 194 is provided on the pipe between the drainer 180 and the water outlet.

[0067] The first dry gas water separator 171, the second dry gas water separator 172, and the third dry gas water separator 173 are arranged in order from far to near according to their distances from the crude hydrogen inlet. The first dry gas water separator 171 is connected to the drainer 180 through a first dry drain pipe, and a first dry drain valve 1931 is provided on the first dry drain pipe; the second dry gas water separator 172 is connected to the drainer 180 through a second dry drain pipe, and a second dry drain valve 1932 is provided on the second dry drain pipe; the third dry gas water separator 173 is connected to the drainer 180 through a third dry drain pipe, and a third dry drain valve 1933 is provided on the third dry drain pipe.

[0068] The on / off of the crude hydrogen drain pipe is controlled by the on / off of the crude hydrogen drain valve 191, the on / off of the deoxygenated drain pipe is controlled by the on / off of the deoxygenated drain valve 192, the on / off of the first dry drain pipe is controlled by the on / off of the first dry drain valve 1931, the on / off of the second dry drain pipe is controlled by the on / off of the second dry drain valve 1932, the on / off of the third dry drain pipe is controlled by the on / off of the third dry drain valve 1933, and the on / off of the pipe between the drainer 180 and the water outlet is controlled by the on / off of the main drain valve 194.

[0069] In addition, the hydrogen purification system further includes a liquid level detector ( Figure 3 not shown in the figure), and the liquid level detector is used to detect the liquid level in the drainer 180.

[0070] Based on Figure 3 the shown hydrogen purification system, as Figure 4As shown in the figure, it is a schematic flowchart corresponding to another drainage control method for a hydrogen purification system provided by an embodiment of the present application, specifically including the following steps S401 to S404:

[0071] S401, according to the detection result of the liquid level detector, determine whether the liquid level in the drainer 180 is not higher than the preset minimum liquid level. If it is not higher than the preset minimum liquid level, execute S202; otherwise, execute S203.

[0072] S402, control the total drain valve 194 to be in the closed state, and sequentially control the first dry drain valve 1931, the second dry drain valve 1932, the third dry drain valve 1933, the deoxidation drain valve 192, and the raw hydrogen drain valve 191 to be in the open state.

[0073] Further, the process of sequentially controlling the first dry drain valve 1931, the second dry drain valve 1932, the third dry drain valve 1933, the deoxidation drain valve 192, and the raw hydrogen drain valve 191 to be in the open state can be to sequentially open the first dry drain valve 1931, the second dry drain valve 1932, the third dry drain valve 1933, the deoxidation drain valve 192, and the raw hydrogen drain valve 191 in sequence. Considering that each device needs a certain time to drain water, the second dry drain valve 1932 can be opened after waiting for a preset duration after opening the first dry drain valve 1931, the third dry drain valve 1933 can be opened after waiting for a preset duration, the deoxidation drain valve 192 can be opened after waiting for a preset duration, and the raw hydrogen drain valve 191 can be opened after waiting for a preset duration.

[0074] It should be noted that the preset duration can be determined according to the drainage volume and the pipe diameter. For example, the preset duration can be set to 1 - 5 minutes, and the specific value is not limited.

[0075] S203, determine whether the liquid level in the drainer 180 reaches the preset maximum liquid level. If it reaches the preset maximum liquid level, execute S204; otherwise, return to S201.

[0076] S204, control the first dry drain valve 1931, the second dry drain valve 1932, the third dry drain valve 1933, the deoxidation drain valve 192, and the raw hydrogen drain valve 191 to be in the closed state, and control the total drain valve 194 to be in the open state.

[0077] Based on the same inventive concept, an embodiment of the present application further provides a drainage controller for a hydrogen purification system, where the hydrogen purification system includes a crude hydrogen water separator, a deoxygenated water separator, at least one dry gas water separator, and a drainer; the crude hydrogen water separator is connected to the drainer through a crude hydrogen drainage pipeline, and a crude hydrogen drainage valve is provided on the crude hydrogen drainage pipeline; the deoxygenated water separator is connected to the drainer through a deoxygenated drainage pipeline, and a deoxygenated drainage valve is provided on the deoxygenated drainage pipeline; the at least one dry gas water separator is connected to the drainer through a dry drainage pipeline, and a dry drainage valve is provided on the dry drainage pipeline; a total drainage valve is provided on the pipeline between the drainer and the water outlet; the hydrogen purification system further includes a liquid level detector and a controller, and the liquid level detector is used to detect the level of the liquid in the drainer; as Figure 5 shown, the controller includes:

[0078] A judgment control module 51, configured to judge whether the level of the liquid in the drainer is not higher than a preset minimum level according to the detection result of the liquid level detector;

[0079] A drainage control module 52, configured to, if it is not higher than the preset minimum level, control the total drainage valve to be in a closed state, and sequentially control the dry drainage valve, the deoxygenated drainage valve, and the crude hydrogen drainage valve to be in an open state.

[0080] Optionally, the judgment control module 51 is further configured to:

[0081] If it is higher than the preset minimum level, judge whether the level of the liquid in the drainer reaches a preset maximum level;

[0082] The drainage control module 52 is further configured to, if it reaches the preset maximum level, control the dry drainage valve, the deoxygenated drainage valve, and the crude hydrogen drainage valve to be in a closed state, and control the total drainage valve to be in an open state.

[0083] Optionally, the at least one dry gas water separator includes a first dry gas water separator, a second dry gas water separator, and a third dry gas water separator, where the first dry gas water separator, the second dry gas water separator, and the third dry gas water separator are arranged in order from far to near according to their distances from the crude hydrogen inlet; a first dry drainage valve is provided between the first dry gas water separator and the drainer, a second dry drainage valve is provided between the second dry gas water separator and the drainer, and a third dry drainage valve is provided between the third dry gas water separator and the drainer;

[0084] The drainage control module 52 is specifically configured to:

[0085] If it is not higher than the preset minimum liquid level, control the total drain valve to be in the closed state, and sequentially control the first dry drain valve, the second dry drain valve, the third dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in the open state.

[0086] Optionally, the drain control module 52 is specifically configured to:

[0087] If it reaches the preset maximum liquid level, control the first dry drain valve, the second dry drain valve, the third dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in the closed state, and control the total drain valve to be in the open state.

[0088] Optionally, the preset minimum liquid level is higher than the bottom of the drainer.

[0089] Based on the same inventive concept, an embodiment of the present application provides a hydrogen purification system, which includes a crude hydrogen water separator, a deoxidized water separator, at least one dry gas water separator, and a drainer; the crude hydrogen water separator is connected to the drainer through a crude hydrogen drain pipeline, and a crude hydrogen drain valve is arranged on the crude hydrogen drain pipeline; the deoxidized water separator is connected to the drainer through a deoxidized drain pipeline, and a deoxidized drain valve is arranged on the deoxidized drain pipeline; the at least one dry gas water separator is connected to the drainer through a dry drain pipeline, and a dry drain valve is arranged on the dry drain pipeline; a total drain valve is arranged on the pipeline between the drainer and the water outlet; the hydrogen purification system further includes a liquid level detector and a drain controller;

[0090] The liquid level detector is used to detect the level of the liquid in the drainer.

[0091] The drain controller is configured to judge whether the liquid level in the drainer is not higher than a preset minimum liquid level according to the detection result of the liquid level detector; if it is not higher than the preset minimum liquid level, control the total drain valve to be in the closed state, and sequentially control the dry drain valve, the deoxidized drain valve, and the crude hydrogen drain valve to be in the open state.

[0092] Based on the same inventive concept, an embodiment of the present application provides a terminal device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method described above is implemented.

[0093] Based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the method described above is implemented.

[0094] The above description is only a description of the preferred embodiments of the present invention, and does not limit the scope of the present invention in any way. Any changes and modifications made by those of ordinary skill in the art according to the above disclosure fall within the scope of protection of the claims.

Claims

1. A drainage control method for a hydrogen purification system, characterized in that, The hydrogen purification system includes a crude hydrogen water separator, a deoxygenated water separator, at least one dry gas water separator, and a drainer; the crude hydrogen water separator is connected to the drainer through a crude hydrogen drain pipe, and a crude hydrogen drain valve is provided on the crude hydrogen drain pipe; the deoxygenated water separator is connected to the drainer through a deoxygenated drain pipe, and a deoxygenated drain valve is provided on the deoxygenated drain pipe; the at least one dry gas water separator is connected to the drainer through a dry drain pipe, and a dry drain valve is provided on the dry drain pipe; a main drain valve is provided on the pipe between the drainer and the water outlet; the hydrogen purification system further includes a liquid level detector for detecting the level of the liquid in the drainer; the method includes: Based on the detection result of the liquid level detector, determine whether the level of the liquid in the drainer is not higher than a preset minimum level; If it is not higher than the preset minimum level, control the main drain valve to be in a closed state, and sequentially control the dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in an open state.

2. The method according to claim 1, characterized in that, The method further includes: If it is higher than the preset minimum level, determine whether the level of the liquid in the drainer reaches a preset maximum level; If it reaches the preset maximum level, control the dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in a closed state, and control the main drain valve to be in an open state.

3. The method according to claim 2, wherein The at least one dry gas water separator includes a first dry gas water separator, a second dry gas water separator, and a third dry gas water separator. Among them, the first dry gas water separator, the second dry gas water separator, and the third dry gas water separator are arranged in order from far to near according to their distances from the crude hydrogen inlet; a first dry drain valve is provided between the first dry gas water separator and the drainer, a second dry drain valve is provided between the second dry gas water separator and the drainer, and a third dry drain valve is provided between the third dry gas water separator and the drainer; If it is not higher than the preset minimum level, controlling the main drain valve to be in a closed state and sequentially controlling the dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in an open state includes: If it is not higher than the preset minimum level, control the main drain valve to be in a closed state, and sequentially control the first dry drain valve, the second dry drain valve, the third dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in an open state.

4. The method according to claim 3, wherein If it reaches the preset maximum level, controlling the dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in a closed state and controlling the main drain valve to be in an open state includes: If it reaches the preset maximum level, control the first dry drain valve, the second dry drain valve, the third dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in a closed state, and control the main drain valve to be in an open state.

5. The method according to any one of claims 1 to 4, characterized in that, The preset minimum liquid level is higher than the bottom of the drainer.

6. A drain controller for a hydrogen purification system, characterized in that, The hydrogen purification system includes a crude hydrogen water separator, a deoxygenated water separator, at least one dry gas water separator, and a drainer; the crude hydrogen water separator is connected to the drainer through a crude hydrogen drain pipe, and a crude hydrogen drain valve is provided on the crude hydrogen drain pipe; the deoxygenated water separator is connected to the drainer through a deoxygenated drain pipe, and a deoxygenated drain valve is provided on the deoxygenated drain pipe; the at least one dry gas water separator is connected to the drainer through a dry drain pipe, and a dry drain valve is provided on the dry drain pipe; a main drain valve is provided on the pipe between the drainer and the water outlet; the hydrogen purification system further includes a liquid level detector and a controller, and the liquid level detector is used to detect the liquid level in the drainer; the controller includes: A judgment and control module, configured to judge whether the liquid level in the drainer is not higher than a preset minimum liquid level according to the detection result of the liquid level detector; A drain control module, configured to, if it is not higher than the preset minimum liquid level, control the main drain valve to be in a closed state, and sequentially control the dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in an open state.

7. The controller according to claim 6, characterized in that, The judgment and control module is further configured to: If it is higher than the preset minimum liquid level, judge whether the liquid level in the drainer reaches a preset maximum liquid level; The drain control module is further configured to, if it reaches the preset maximum liquid level, control the dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in a closed state, and control the main drain valve to be in an open state.

8. A hydrogen purification system, characterized in that, The hydrogen purification system includes a crude hydrogen water separator, a deoxygenated water separator, at least one dry gas water separator, and a drainer; the crude hydrogen water separator is connected to the drainer through a crude hydrogen drain pipe, and a crude hydrogen drain valve is provided on the crude hydrogen drain pipe; the deoxygenated water separator is connected to the drainer through a deoxygenated drain pipe, and a deoxygenated drain valve is provided on the deoxygenated drain pipe; the at least one dry gas water separator is connected to the drainer through a dry drain pipe, and a dry drain valve is provided on the dry drain pipe; a main drain valve is provided on the pipe between the drainer and the water outlet; the hydrogen purification system further includes a liquid level detector and a drain controller; The liquid level detector is used to detect the liquid level in the drainer; The drain controller is configured to judge whether the liquid level in the drainer is not higher than a preset minimum liquid level according to the detection result of the liquid level detector; If it is not higher than the preset minimum liquid level, control the main drain valve to be in a closed state, and sequentially control the dry drain valve, the deoxygenated drain valve, and the crude hydrogen drain valve to be in an open state.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, the method according to any one of claims 1 to 5 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, the method according to any one of claims 1 to 5 is implemented.

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