Hydrogen production system convenient for maintenance of electrolytic cell and maintenance method

Abstract

The invention discloses a hydrogen production system convenient for overhauling an electrolytic bath and an overhauling method, and relates to the technical field of electrolytic baths. Comprising a plurality of electrolytic cells, a hydrogen gas-liquid separation device, a hydrogen purification device, a hydrogen collection device, an oxygen gas-liquid separation device, an oxygen purification device and an oxygen collection device, hydrogen outlets of the plurality of electrolytic cells are connected with the hydrogen gas-liquid separation device through pipelines; oxygen outlets of the plurality of electrolytic cells are connected with the oxygen gas-liquid separation device through pipelines; a first safety control valve is arranged on the pipeline between the hydrogen outlet of each electrolytic cell and the hydrogen gas-liquid separation device, and a second safety control valve is arranged on the pipeline between the oxygen outlet of each electrolytic cell and the oxygen gas-liquid separation device. When the electrolytic cell needs to be overhauled, flowing of hydrogen and oxygen can be cut off, and the safety of the electrolytic cell during overhauling is improved; meanwhile, normal use of other electrolytic cells is not affected by overhaul of a single electrolytic cell, and the influence of the overhaul process on the production efficiency is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrolyzers, and in particular to a hydrogen production system and a maintenance method for electrolyzers that are convenient for maintenance. Background Art

[0002] As the demand for energy grows, non-renewable energy such as fossil fuels is increasingly consumed, and the development and utilization of new energy sources has become an increasingly urgent requirement. Hydrogen is non-toxic, and the product after combustion is water, which does not pollute the air. It is considered an ideal clean new energy source and is attracting more and more attention. The electrolyzer hydrogen production technology is also developing continuously. The hydrogen produced by the electrolyzer is collected after passing through the gas-water separator and purification mechanism. Due to the low efficiency of hydrogen production by electrolysis, the electrolyzer is composed of multiple electrolytic chambers stacked vertically. Laterally, multiple electrolyzers are used to correspond to the same gas-water separator at the same time to improve the hydrogen production efficiency. However, when a single electrolyzer is overhauled, the entire hydrogen production system needs to be cut off, which seriously affects production efficiency. Summary of the invention

[0003] The main purpose of the present invention is to provide a hydrogen production system and maintenance method that are convenient for electrolyzer maintenance, so as to solve the above-mentioned problems.

[0004] To achieve the above-mentioned purpose, the present invention provides a hydrogen production system which is convenient for electrolyzer maintenance, comprising a plurality of electrolyzers, a hydrogen gas-liquid separation device, a hydrogen purification device, a hydrogen collection device, an oxygen gas-liquid separation device, an oxygen purification device and an oxygen collection device; the hydrogen outlets of the plurality of electrolyzers are connected to the inlet of the hydrogen gas-liquid separation device through pipelines, the gas outlet of the hydrogen gas-liquid separation device is connected to the gas inlet of the hydrogen purification device, and the gas outlet of the hydrogen purification device is connected to the hydrogen collection device; the oxygen outlets of the plurality of electrolyzers are connected to the inlet of the oxygen gas-liquid separation device through pipelines, the gas outlet of the oxygen gas-liquid separation device is connected to the gas inlet of the oxygen purification device, and the gas outlet of the oxygen purification device is connected to the oxygen collection device; a first safety control valve is provided on the pipeline between the hydrogen outlet of each electrolyzer and the hydrogen gas-liquid separation device, and a second safety control valve is provided on the pipeline between the oxygen outlet of each electrolyzer and the oxygen gas-liquid separation device.

[0005] Furthermore, the electrolytic cell includes a left end plate, a right end plate, a pole plate assembly, a sealing gasket and a fixed pull rod. The pole plate assembly is provided in plurality, and the plurality of pole plate assemblies are axially arranged between the left end plate and the right end plate. A sealing gasket is sandwiched between two adjacent pole plate assemblies, and the left end plate and the right end plate are fixedly connected by a plurality of fixed pull rods.

[0006] Furthermore, the left end plate, the right end plate and the pole plate assembly are all provided with fixing plates.

[0007] The present invention also provides an electrolytic cell maintenance method, comprising the following steps:

[0008] S100, determining the electrolytic cell that needs to be repaired;

[0009] S200, closing the first safety control valve and the second safety control valve corresponding to the electrolytic cell;

[0010] S300, overhauling the electrolytic cell;

[0011] S400, after the electrolytic cell is overhauled, reopen the first safety control valve and the second safety control valve corresponding to the electrolytic cell;

[0012] S400, repeat the above steps to inspect other electrolytic cells one by one.

[0013] Furthermore, step S300 also includes the following steps:

[0014] S301, determining the electrolysis chamber or plate assembly that needs to be repaired;

[0015] S302, using a temporary clamping assembly to clamp the electrode assembly on the left side of the electrolytic chamber or the electrode assembly and the fixing plate on the left end plate; using another temporary clamping assembly to clamp the electrode assembly on the right side of the electrolytic chamber or the electrode assembly and the fixing plate on the right end plate;

[0016] S303, dismantling the fixed pull rod and inspecting the electrolytic chamber or the plate assembly;

[0017] S304, after the electrolytic chamber or the plate assembly is overhauled, the fixing rod is reinstalled; finally, the temporary clamping assembly is disassembled.

[0018] Furthermore, the temporary clamping assembly includes a left clamping plate, a right clamping plate and a threaded pull rod, and the left clamping plate and the right clamping plate are connected by the threaded pull rod.

[0019] The present invention has the following beneficial effects:

[0020] The present invention adds a valve between the hydrogen and oxygen side outlet of the electrolytic cell and the gas-liquid separator to cut off the flow of hydrogen and oxygen when the electrolytic cell needs to be repaired, so as to prevent gas or alkali liquid leakage during the electrolytic cell repair process, avoid fire, explosion and other safety accidents caused by leakage, and improve the safety of the electrolytic cell during repair; at the same time, the repair of a single electrolytic cell does not affect the normal use of other electrolytic cells, thereby reducing the impact of the repair process on production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a schematic diagram of a hydrogen production system that facilitates electrolyzer maintenance.

[0022] Figure 2The present invention is a schematic diagram of an electrolyzer of a hydrogen production system that is convenient for electrolyzer maintenance.

[0023] Figure 3 This is a schematic diagram of a temporary clamping assembly of a hydrogen production system for facilitating electrolyzer maintenance according to the present invention.

[0024] Figure 4 The present invention is a schematic diagram of a disassembled electrolyzer of a hydrogen production system for facilitating electrolyzer maintenance.

[0025] Among them, 1-electrolyzer; 2-first safety control valve; 3-second safety control; 4-hydrogen gas-liquid separation device; 5-oxygen gas-liquid separation device; 6-hydrogen purification device; 7-oxygen purification device; 101-left end plate; 102-right end plate; 103-fixed rod; 104-electrode plate assembly; 105-fixed plate; 801-left clamping plate; 802-threaded rod; 803-right clamping plate. DETAILED DESCRIPTION

[0026] In order to achieve the above-mentioned purpose and effect, the technical means and structures adopted by the present invention are described in detail with reference to the accompanying drawings for the features and functions of the preferred embodiments of the present invention.

[0027] like Figure 1 As shown, the present invention provides a hydrogen production system that is convenient for electrolyzer maintenance, including multiple electrolyzers 1, a hydrogen gas-liquid separation device 4, a hydrogen purification device 6, a hydrogen collection device, an oxygen gas-liquid separation device 5, an oxygen purification device 7 and an oxygen collection device; the hydrogen outlets of the multiple electrolyzers 1 are connected to the inlet of the hydrogen gas-liquid separation device 4 through pipelines, the gas outlet of the hydrogen gas-liquid separation device 4 is connected to the gas inlet of the hydrogen purification device 6, and the gas outlet of the hydrogen purification device 6 is connected to the hydrogen collection device; the oxygen outlets of the multiple electrolyzers 1 are connected to the inlet of the oxygen gas-liquid separation device 5 through pipelines, the gas outlet of the oxygen gas-liquid separation device 5 is connected to the gas inlet of the oxygen purification device 7, and the gas outlet of the oxygen purification device 7 is connected to the oxygen collection device; a first safety control valve 2 is provided on the pipeline between the hydrogen outlet of each electrolyzer 1 and the hydrogen gas-liquid separation device 4, and a second safety control valve 3 is provided on the pipeline between the oxygen outlet of each electrolyzer 1 and the oxygen gas-liquid separation device 5.

[0028] In another embodiment, the electrolytic cell 1 includes a left end plate 101, a right end plate 102, a pole plate assembly 104, a sealing gasket and a fixed pull rod 103. The pole plate assembly 104 is provided in plurality, and the plurality of pole plate assemblies are axially arranged between the left end plate 101 and the right end plate 102. A sealing gasket is sandwiched between two adjacent pole plate assemblies 104, and the left end plate 101 and the right end plate 102 are fixedly connected by a plurality of fixed pull rods 103.

[0029] In another embodiment, a fixing plate 105 is disposed on the left end plate 101 , the right end plate 102 and the pole plate assembly 104 .

[0030] The present invention also provides an electrolytic cell maintenance method, comprising the following steps:

[0031] S100, determining the electrolytic cell 1 that needs to be repaired;

[0032] S200, closing the first safety control valve 2 and the second safety control valve 3 corresponding to the electrolytic cell 1;

[0033] S300, overhauling the electrolytic cell 1;

[0034] S400, after the electrolytic cell 1 is overhauled, reopen the first safety control valve 2 and the second safety control valve 3 corresponding to the electrolytic cell 1;

[0035] S400, repeat the above steps to inspect other electrolytic cells one by one.

[0036] In another embodiment, step S300 further includes the following steps:

[0037] S301, determining the electrolysis chamber or plate assembly 104 that needs to be repaired;

[0038] S302, such as Figure 3 As shown, a temporary clamping assembly 8 is used to clamp the electrode plate assembly 104 on the left side of the electrolytic chamber or the electrode plate assembly 104 and the fixing plate 105 on the left end plate 104; another temporary clamping assembly 8 is used to clamp the electrode plate assembly 104 on the right side of the electrolytic chamber or the electrode plate assembly 104 and the fixing plate 105 on the right end plate 102;

[0039] S303, such as Figure 4 As shown, the fixed pull rod 103 is disassembled and the electrolysis chamber or the plate assembly 104 is inspected;

[0040] S304, after the electrolysis chamber or the plate assembly 104 is overhauled, the fixing rod 103 is reinstalled; and finally, the temporary clamping assembly 8 is disassembled.

[0041] In another embodiment, if Figure 3-4 As shown, the temporary clamping assembly 8 includes a left clamping plate 801 , a right clamping plate 803 and a threaded pull rod 802 , and the left clamping plate 801 and the right clamping plate 803 are connected by the threaded pull rod 802 .

[0042] The above descriptions are only preferred embodiments of the present invention, not all embodiments. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to the present invention, belong to the protection scope of the present invention.

Claims

1. A hydrogen production system that facilitates electrolyzer maintenance, characterized in that: The invention comprises a plurality of electrolyzers, a hydrogen gas-liquid separation device, a hydrogen purification device, a hydrogen collecting device, an oxygen gas-liquid separation device, an oxygen purification device and an oxygen collecting device; the hydrogen outlets of the plurality of electrolyzers are connected to the inlet of the hydrogen gas-liquid separation device through pipelines, the gas outlet of the hydrogen gas-liquid separation device is connected to the gas inlet of the hydrogen purification device, and the gas outlet of the hydrogen purification device is connected to the hydrogen collecting device; the oxygen outlets of the plurality of electrolyzers are connected to the inlet of the oxygen gas-liquid separation device through pipelines, the gas outlet of the oxygen gas-liquid separation device is connected to the gas inlet of the oxygen purification device, and the gas outlet of the oxygen purification device is connected to the oxygen collecting device; a first safety control valve is arranged on the pipeline between the hydrogen outlet of each electrolyzer and the hydrogen gas-liquid separation device, and a second safety control valve is arranged on the pipeline between the oxygen outlet of each electrolyzer and the oxygen gas-liquid separation device.

2. A hydrogen production system for facilitating electrolytic cell maintenance as claimed in claim 1, characterized in that: The electrolytic cell includes a left end plate, a right end plate, a pole plate assembly, a sealing gasket and a fixed pull rod. There are multiple pole plate assemblies, which are axially arranged between the left end plate and the right end plate. A sealing gasket is sandwiched between two adjacent pole plate assemblies, and the left end plate and the right end plate are fixedly connected by multiple fixed pull rods.

3. A hydrogen production system for facilitating electrolytic cell maintenance as claimed in claim 2, characterized in that: The left end plate, the right end plate and the pole plate assembly are all provided with fixing plates.

4. A method for repairing an electrolytic cell, characterized in that: The method for overhauling an electrolyzer in a hydrogen production system that facilitates electrolyzer overhaul according to any one of claims 1 to 3 comprises the following steps: S100, determining the electrolytic cell that needs to be repaired; S200, closing the first safety control valve and the second safety control valve corresponding to the electrolytic cell; S300, overhauling the electrolytic cell; S400, after the electrolytic cell is overhauled, reopen the first safety control valve and the second safety control valve corresponding to the electrolytic cell; S400, repeat the above steps to inspect other electrolytic cells one by one.

5. A method for repairing an electrolytic cell as claimed in claim 4, characterized in that: For the electrolyzer in the hydrogen production system for facilitating electrolyzer maintenance as claimed in claim 3, step S300 further includes the following steps: S301, determining the electrolysis chamber or plate assembly that needs to be repaired; S302, using a temporary clamping assembly to clamp the electrode assembly on the left side of the electrolytic chamber or the electrode assembly and the fixing plate on the left end plate; using another temporary clamping assembly to clamp the electrode assembly on the right side of the electrolytic chamber or the electrode assembly and the fixing plate on the right end plate; S303, dismantling the fixed pull rod and inspecting the electrolytic chamber or the plate assembly; S304, after the electrolytic chamber or the plate assembly is overhauled, the fixing rod is reinstalled; finally, the temporary clamping assembly is disassembled.

6. A method for repairing an electrolytic cell as claimed in claim 5, characterized in that: The temporary clamping assembly comprises a left clamping plate, a right clamping plate and a threaded pull rod, and the left clamping plate and the right clamping plate are connected by the threaded pull rod.

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