Many-to-one alkaline electrolyzed water system

Abstract

The utility model relates to the field of water electrolysis, in particular to a many-to-one alkaline water electrolysis system which comprises an electrolytic tank, a hydrogen separation tank, a first connecting pipe and a first detection pipe, the electrolytic tank is provided with an electrolytic bath, the outer wall of the electrolytic tank is provided with a hydrogen outlet, the hydrogen outlet is communicated with the electrolytic bath, the hydrogen separation tank is provided with a hydrogen inlet, one end of the first connecting pipe is communicated with the hydrogen outlet, and the other end of the first connecting pipe is communicated with the first detection pipe. The other end of the first connecting pipe is communicated with the hydrogen inlet, a mounting opening is formed in the upward inner wall of the first connecting pipe, the lower end of the first detection pipe is coaxially and fixedly connected to the inner wall of the mounting opening, and a first detection opening is formed in the upper end of the first detection pipe. Hydrogen carrying alkali liquor is discharged from the hydrogen outlet and enters the hydrogen separation tank after passing through the first connecting pipe, the hydrogen carrying the alkali liquor is subjected to gas-liquid separation to a certain degree in the rising process through the first detection pipe, the hydrogen discharged from the first detection port is sampled, the quality of gas generated by a single electrolytic cell is conveniently detected, and the probability of safety accidents is reduced.

Description

Technical Field

[0001] The present application relates to the field of water electrolysis, and in particular to a many-to-one alkaline water electrolysis system. Background Art

[0002] The source of hydrogen is an important issue in the development of hydrogen energy. At present, hydrogen is still used as an industrial raw material gas and has extensive applications in the chemical industry. The electrolysis of water to produce hydrogen is green and environmentally friendly, flexible in production, and high in purity. If combined with renewable energy generation and large-scale utilization of abandoned electricity, the cost can be significantly reduced. It has extremely high commercial potential and is the most promising method for producing green hydrogen energy.

[0003] Among the hydrogen production technologies, alkaline water electrolysis is the most mature technology. Since it works in an alkaline environment and does not require the use of precious metals as electrode materials, it occupies a major market share in the hydrogen production technology. This technology has the advantages of low equipment cost, long life and robustness, and is suitable for large-scale production of green hydrogen.

[0004] The many-to-one alkaline electrolysis water system uses multiple electrolytic cells to electrolyze water simultaneously. The gas produced after electrolysis is recovered by a separation tank. In order to detect the amount of electrolyte, people generally extract the gas in the separation tank for testing. However, if one electrolytic cell is damaged, the overall quality of the detected gas may be qualified, and the continuous operation of the system may cause a tank explosion accident, posing a safety hazard. Utility Model Content

[0005] In order to reduce the probability of safety accidents, the present application provides a many-to-one alkaline water electrolysis system.

[0006] The many-to-one alkaline water electrolysis system provided in this application adopts the following technical solution:

[0007] A many-to-one alkaline water electrolysis system comprises an electrolytic cell, a hydrogen separation tank, a first connecting pipe and a first detection tube, wherein the electrolytic cell is provided with an electrolytic tank, an outer wall of the electrolytic cell is provided with a hydrogen outlet, the hydrogen outlet is connected to the electrolytic tank, the hydrogen separation tank is provided with a hydrogen inlet, one end of the first connecting pipe is connected to the hydrogen outlet, the other end of the first connecting pipe is connected to the hydrogen inlet, an installation port is provided on the upward inner wall of the first connecting pipe, the lower end of the first detection tube is coaxially fixedly connected to the inner wall of the installation port, and the upper end of the first detection tube is provided with a first detection port.

[0008] By adopting the above technical solution, hydrogen carrying alkaline liquid is discharged from the hydrogen outlet and enters the hydrogen separation tank after passing through the first connecting pipe. The first detection tube allows the hydrogen carrying alkaline liquid to undergo a certain degree of gas-liquid separation during the rising process, thereby reducing the alkaline liquid carried by the hydrogen. The hydrogen discharged from the first detection port is sampled, which is convenient for detecting the gas quality generated by a single electrolytic cell and reducing the probability of safety accidents.

[0009] Preferably, the axis of the first detection tube is vertical.

[0010] By adopting the above technical solution, the resistance of gas rising is reduced, so that the gas can be discharged from the first detection port after passing through the first detection tube.

[0011] Preferably, the diameter of the first detection tube is larger than the diameter of the first connecting tube.

[0012] By adopting the above technical solution, the pressure in the first detection tube is lower than the pressure in the first connecting tube, which promotes the rupture of the alkaline solution bubbles encapsulating the gas, reduces the probability of the gas carrying the alkaline solution, facilitates the collection of gas, detects the gas quality, and reduces the waste of alkaline solution.

[0013] Preferably, it also includes a plum blossom valve, which is arranged between the first detection port and the installation port, and is connected to the inner wall of the first detection tube, and is used to control the on-off of the first detection tube.

[0014] By adopting the above technical solution, the plum blossom valve is used to control the on-off of the first detection tube. When sampling and testing are not needed, the plum blossom valve is closed to interrupt the transportation of the first detection tube, thereby reducing gas waste.

[0015] Preferably, it also includes a pressure reducing valve, which is arranged between the plum blossom valve and the first detection port, and is connected to the inner wall of the first detection tube, and is used to control the gas flow rate.

[0016] By adopting the above technical solution, the gas outflow speed is controlled by the pressure reducing valve so that the outflow speed is lower than or equal to the gas-liquid separation speed of hydrogen and alkali solution. The alkali solution will not flow out with the gas, thereby improving the sampling quality and reducing the waste of alkali solution.

[0017] Preferably, it also includes a cooler and a first alkali solution circulation pump, the lower end of the hydrogen separation tank is provided with a first liquid outlet, the outer wall of the electrolytic cell is provided with a first liquid return port, the first liquid return port is connected to the electrolytic cell, the inlet of the cooler is connected to the first liquid outlet, the outlet of the cooler is connected to the inlet of the first alkali solution circulation pump, and the outlet of the first alkali solution circulation pump is connected to the first liquid return port.

[0018] By adopting the above technical solution, the alkali liquid in the hydrogen separation tank is discharged from the first liquid outlet, cooled by the cooler, so that the gas overflows from the alkali liquid, and the treated alkali liquid is returned to the electrolytic cell through the first alkali liquid circulation pump, thereby realizing the recovery of the alkali liquid and reducing resource waste.

[0019] Preferably, it also includes an oxygen separation tank, a second connecting tube and a second detection tube, the outer wall of the electrolytic cell is provided with an oxygen outlet, the oxygen outlet is connected to the electrolytic cell, the oxygen separation tank is provided with an oxygen inlet, one end of the second connecting tube is connected to the oxygen outlet, the other end of the second connecting tube is connected to the oxygen inlet, the upward inner wall of the second connecting tube is provided with a placement port, the lower end of the second detection tube is coaxially fixedly connected to the inner wall of the placement port, and the upper end of the second detection tube is provided with a second detection port.

[0020] By adopting the above technical solution, oxygen carrying alkali liquid is discharged from the oxygen outlet and enters the oxygen separation tank after passing through the second connecting pipe. The second detection tube allows the oxygen carrying alkali liquid to undergo a certain degree of gas-liquid separation during the rising process, thereby reducing the alkali liquid carried by the oxygen. The oxygen discharged from the second detection port is sampled, which is convenient for detecting the gas quality generated by a single electrolytic cell and reducing the probability of safety accidents.

[0021] Preferably, it also includes an alkali liquid filter and a second alkali liquid circulation pump, the lower end of the oxygen separation tank is provided with a second liquid outlet, the outer wall of the electrolytic cell is provided with a second liquid return port, the second liquid return port is connected to the electrolytic cell, the inlet of the alkali liquid filter is connected to the second liquid outlet, the outlet of the alkali liquid filter is connected to the inlet of the second alkali liquid circulation pump, and the outlet of the second alkali liquid circulation pump is connected to the second liquid return port.

[0022] By adopting the above technical solution, the alkali liquid in the oxygen separation tank is discharged from the second liquid outlet, passes through the alkali liquid filter, and the treated alkali liquid is returned to the electrolytic cell through the second alkali liquid circulation pump, thereby realizing the recovery of the alkali liquid and reducing resource waste.

[0023] Preferably, there are a plurality of electrolytic cells, there are a plurality of first connecting tubes, and the first connecting tubes are arranged in a one-to-one correspondence with the electrolytic cells; there are a plurality of first detection tubes, and the first detection tubes are arranged in a one-to-one correspondence with the first connecting tubes.

[0024] By adopting the above technical solution, each electrolytic cell is tested, which makes it easier to judge the status of a single electrolytic cell and reduces the probability of safety accidents being reported.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Hydrogen carrying alkali liquid is discharged from the hydrogen outlet and enters the hydrogen separation tank after passing through the first connecting pipe. The first detection tube allows the hydrogen carrying alkali liquid to undergo a certain degree of gas-liquid separation during the rising process, thereby reducing the alkali liquid carried by the hydrogen. The hydrogen discharged from the first detection port is sampled to facilitate the detection of the gas quality generated by a single electrolytic cell and reduce the probability of safety accidents.

[0027] 2. The pressure in the first detection tube is lower than the pressure in the first connecting tube, which promotes the rupture of the alkali solution bubbles encapsulating the gas, reduces the probability of the gas carrying the alkali solution, facilitates the collection of gas, detects the gas quality, and reduces the waste of alkali solution;

[0028] 3. The gas outflow rate is controlled by a pressure reducing valve so that the outflow rate is lower than or equal to the gas-liquid separation rate of hydrogen and alkali solution. The alkali solution will not flow out with the gas, thereby improving the sampling quality and reducing the waste of alkali solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a many-to-one alkaline water electrolysis system.

[0030] Explanation of the reference numerals: 1. electrolytic cell; 11. electrolytic tank; 12. hydrogen outlet; 13. oxygen outlet; 14. first liquid return port; 15. second liquid return port; 2. hydrogen separation tank; 21. hydrogen air inlet; 22. first liquid outlet; 3. first connecting pipe; 31. installation port; 4. first detection tube; 41. first detection port; 5. oxygen separation tank; 51. oxygen air inlet; 52. second liquid outlet; 6. second connecting pipe; 61. placement port; 7. second detection tube; 71. second detection port; 8. control component; 81. plum blossom valve; 82. pressure reducing valve; 9. recovery component; 91. alkali solution filter; 92. cooler; 93. first alkali solution circulation pump; 94. second alkali solution circulation pump. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1 This application is described in further detail.

[0032] The present application embodiment discloses a many-to-one alkaline water electrolysis system. Figure 1 The many-to-one alkaline water electrolysis system includes an electrolytic cell 1, a hydrogen separation tank 2, a first connecting pipe 3, a first detection tube 4, an oxygen separation tank 5, a second connecting pipe 6, a second detection tube 7, a control component 8 and a recovery component 9.

[0033] The electrolytic cell 1 is provided with an electrolytic tank 11, and a hydrogen outlet 12 is provided on the outer wall of the electrolytic cell 1, and the hydrogen outlet 12 is connected to the electrolytic tank 11, and a hydrogen gas inlet 21 is provided on the hydrogen separation tank 2, and one end of the first connecting tube 3 is connected to the hydrogen outlet 12, and the other end of the first connecting tube 3 is connected to the hydrogen gas inlet 21, and an installation port 31 is provided on the inner wall of the first connecting tube 3 facing upward, and the lower end of the first detection tube 4 is coaxially fixedly connected to the inner wall of the installation port 31, and a first detection port 41 is provided on the upper end of the first detection tube 4. The axis of the first detection tube 4 is vertical, and the diameter of the first detection tube 4 is greater than the diameter of the first connecting tube 3.

[0034] Reference Figure 1The outer wall of the electrolytic cell 1 is provided with an oxygen outlet 13, which is connected to the electrolytic cell 11, the oxygen separation tank 5 is provided with an oxygen inlet 51, one end of the second connecting tube 6 is connected to the oxygen outlet 13, and the other end of the second connecting tube 6 is connected to the oxygen inlet 51. The inner wall of the second connecting tube 6 facing upward is provided with a placement port 61, the lower end of the second detection tube 7 is coaxially fixedly connected to the inner wall of the placement port 61, and the upper end of the second detection tube 7 is provided with a second detection port 71. The axis of the second detection tube 7 is vertical, and the diameter of the second detection tube 7 is greater than the diameter of the second connecting tube 6.

[0035] There are multiple electrolytic cells 1, multiple first connecting tubes 3, the number of which is equal to the number of electrolytic cells 1, and the first connecting tubes 3 are arranged one-to-one with the electrolytic cells 1. There are multiple first detection tubes 4, the number of which is equal to the number of first connecting tubes 3, and the first detection tubes 4 are arranged one-to-one with the first connecting tubes 3. There are multiple second connecting tubes 6, the number of which is equal to the number of electrolytic cells 1, and the second connecting tubes 6 are arranged one-to-one with the electrolytic cells 1. There are multiple second detection tubes 7, the number of which is equal to the number of second connecting tubes 6, and the second detection tubes 7 are arranged one-to-one with the second connecting tubes 6.

[0036] Reference Figure 1 , the control member 8 includes a plum blossom valve 81 and a pressure reducing valve 82. There are multiple control members 8. The number of control members 8 is equal to the number of the first detection tubes 4 plus the number of the second detection tubes 7. The control members 8 are arranged on the first detection tubes 4 and the second detection tubes 7 in a one-to-one correspondence. When the control member 8 is installed on the first detection tube 4, the control member 8 is arranged between the first detection port 41 and the installation port 31, the plum blossom valve 81 is connected to the inner wall of the first detection tube 4, the plum blossom valve 81 is used to control the on and off of the first detection tube 4, the pressure reducing valve 82 is arranged between the plum blossom valve 81 and the first detection port 41, the pressure reducing valve 82 is connected to the inner wall of the first detection tube 4, and the pressure reducing valve 82 is used to control the gas flow rate. When the control member 8 is installed on the second detection tube 7, the control member 8 is arranged between the second detection port 71 and the placement port 61, the plum blossom valve 81 is connected to the inner wall of the second detection tube 7, the pressure reducing valve 82 is arranged between the plum blossom valve 81 and the second detection port 71, and the pressure reducing valve 82 is connected to the inner wall of the second detection tube 7.

[0037] Reference Figure 1 The recovery component 9 includes a cooler 92, a first alkali solution circulation pump 93, an alkali solution filter 91 and a second alkali solution circulation pump 94. The lower end of the hydrogen separation tank 2 is provided with a first liquid outlet 22. The outer wall of the electrolytic cell 1 is provided with a first liquid return port 14. The first liquid return port 14 is connected to the electrolytic cell 11. The inlet of the cooler 92 is connected to the first liquid outlet 22. The outlet of the cooler 92 is connected to the inlet of the first alkali solution circulation pump 93. The outlet of the first alkali solution circulation pump 93 is connected to the first liquid return port 14.

[0038] The lower end of the oxygen separation tank 5 is provided with a second liquid outlet 52, the outer wall of the electrolytic cell 1 is provided with a second liquid return port 15, the second liquid return port 15 is connected to the electrolytic cell 11, the inlet of the alkali liquid filter 91 is connected to the second liquid outlet 52, the inlet of the second alkali liquid circulation pump 94 is connected to the outlet of the alkali liquid filter 91, and the outlet of the second alkali liquid circulation pump 94 is connected to the second liquid return port 15. The alkali liquid discharged from the oxygen separation tank 5 has a high oxygen content and is easy to corrode the cooler 92. The alkali liquid filter 91 is used for filtering to reduce the corrosion of the cooler 92.

[0039] The implementation principle of a many-to-one alkaline water electrolysis system in the embodiment of the present application is as follows: electrolysis in the electrolytic cell 1 generates hydrogen and oxygen, the hydrogen carries the alkaline liquid and is discharged from the hydrogen outlet 12 through the first connecting pipe 3 to be collected by the hydrogen separation tank 2, and the oxygen carries the alkaline liquid and is discharged from the oxygen outlet 13 through the second connecting pipe 6 to be collected by the oxygen separation tank 5. When the amount of electrolyte needs to be detected, the plum blossom valve 81 is opened and the pressure reducing valve 82 is controlled so that the gas outflow speed is less than or equal to the gas-liquid separation speed, and the gas sampling is completed. The alkaline liquid in the hydrogen separation tank 2 flows back to the electrolytic cell 1 after passing through the cooler 92, and the alkaline liquid in the oxygen separation tank 5 flows back to the electrolytic cell 1 through the alkaline liquid filter 91.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A many-to-one alkaline water electrolysis system, characterized in that: The invention comprises an electrolytic cell (1), a hydrogen separation tank (2), a first connecting pipe (3) and a first detection tube (4), wherein the electrolytic cell (1) is provided with an electrolytic cell (11), the outer wall of the electrolytic cell (1) is provided with a hydrogen outlet (12), the hydrogen outlet (12) is connected to the electrolytic cell (11), the hydrogen separation tank (2) is provided with a hydrogen inlet (21), one end of the first connecting pipe (3) is connected to the hydrogen outlet (12), the other end of the first connecting pipe (3) is connected to the hydrogen inlet (21), the upward inner wall of the first connecting pipe (3) is provided with a mounting port (31), the lower end of the first detection tube (4) is coaxially fixedly connected to the inner wall of the mounting port (31), and the upper end of the first detection tube (4) is provided with a first detection port (41).

2. The many-to-one alkaline water electrolysis system according to claim 1, characterized in that: The axis of the first detection tube (4) is vertical.

3. The many-to-one alkaline water electrolysis system according to claim 1, characterized in that: The diameter of the first detection tube (4) is greater than the diameter of the first connecting tube (3).

4. The many-to-one alkaline water electrolysis system according to claim 1, characterized in that: It also comprises a plum blossom valve (81), the plum blossom valve (81) being arranged between the first detection port (41) and the installation port (31), the plum blossom valve (81) being connected to the inner wall of the first detection tube (4), and the plum blossom valve (81) being used to control the on-off of the first detection tube (4).

5. The many-to-one alkaline water electrolysis system according to claim 4, characterized in that: It also comprises a pressure reducing valve (82), the pressure reducing valve (82) being arranged between the plum blossom valve (81) and the first detection port (41), the pressure reducing valve (82) being connected to the inner wall of the first detection tube (4), and the pressure reducing valve (82) being used to control the gas flow rate.

6. The many-to-one alkaline water electrolysis system according to claim 1, characterized in that: The invention also comprises a cooler (92) and a first alkali solution circulation pump (93); the lower end of the hydrogen separation tank (2) is provided with a first liquid outlet (22); the outer wall of the electrolytic cell (1) is provided with a first liquid return port (14); the first liquid return port (14) is connected to the electrolytic cell (11); the inlet of the cooler (92) is connected to the first liquid outlet (22); the outlet of the cooler (92) is connected to the inlet of the first alkali solution circulation pump (93); and the outlet of the first alkali solution circulation pump (93) is connected to the first liquid return port (14).

7. The many-to-one alkaline water electrolysis system according to claim 1, characterized in that: The electrolytic cell (1) further comprises an oxygen separation tank (5), a second connecting pipe (6) and a second detection pipe (7); the outer wall of the electrolytic cell (1) is provided with an oxygen outlet (13), the oxygen outlet (13) is connected to the electrolytic cell (11); the oxygen separation tank (5) is provided with an oxygen inlet (51); one end of the second connecting pipe (6) is connected to the oxygen outlet (13), the other end of the second connecting pipe (6) is connected to the oxygen inlet (51); the upward inner wall of the second connecting pipe (6) is provided with a placement port (61); the lower end of the second detection pipe (7) is coaxially fixedly connected to the inner wall of the placement port (61), and the upper end of the second detection pipe (7) is provided with a second detection port (71).

8. The many-to-one alkaline water electrolysis system according to claim 7, characterized in that: The electrolytic cell (1) further comprises an alkali liquid filter (91) and a second alkali liquid circulation pump (94); the lower end of the oxygen separation tank (5) is provided with a second liquid outlet (52); the outer wall of the electrolytic cell (1) is provided with a second liquid return port (15); the second liquid return port (15) is connected to the electrolytic cell (11); the inlet of the alkali liquid filter (91) is connected to the second liquid outlet (52); the outlet of the alkali liquid filter (91) is connected to the inlet of the second alkali liquid circulation pump (94); and the outlet of the second alkali liquid circulation pump (94) is connected to the second liquid return port (15).

9. The many-to-one alkaline water electrolysis system according to claim 1, characterized in that: The electrolytic cells (1) are provided in plurality, the first connecting tubes (3) are provided in plurality, and the first connecting tubes (3) are arranged in a one-to-one correspondence with the electrolytic cells (1), and the first detecting tubes (4) are provided in plurality, and the first detecting tubes (4) are arranged in a one-to-one correspondence with the first connecting tubes (3).

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