Water supplementing device for improving hydrogen purity

Abstract

The utility model discloses a water replenishing device for improving hydrogen purity, which relates to the technical field of electrolytic hydrogen production and comprises a temperature exchange shell, a temperature exchange tube is arranged in the temperature exchange shell, and an electrolyte liquid inlet tube and an electrolyte liquid outlet tube are respectively mounted at two ends of the temperature exchange tube in a matched manner. The electrolyte liquid inlet pipe and the electrolyte liquid outlet pipe are fixedly installed at the two ends of the temperature exchange shell respectively, a collecting shell is further installed on the temperature exchange shell in a matched mode, the temperature exchange shell is communicated with the interior of the collecting shell, a water inlet pipe and an air outlet pipe are installed on the collecting shell in a matched mode, and a first water outlet pipe is further installed on the temperature exchange shell in a matched mode. And the first water outlet pipe is vertically arranged downwards. According to the utility model, heat exchange between the deionized water and the concentrated electrolyte can be controlled, so that the temperature of the deionized water in the temperature exchange shell is increased, N2, O2 and CO2 dissolved in the deionized water are separated out from the deionized water, and the purity of hydrogen separated out from the electrolytic cell is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic hydrogen production, in particular to a water replenishing device for improving the purity of hydrogen. Background Art

[0002] The alkaline electrolyte in the electrolytic cell of the current alkaline water electrolysis hydrogen production system generally uses potassium hydroxide solution. After the alkaline electrolyte is electrolyzed for a period of time, the concentration of the electrolyte will increase. At this time, deionized water needs to be added to the potassium hydroxide solution for dilution, and then the diluted electrolyte is filled into the electrolytic cell for the next electrolysis operation.

[0003] However, the current deionized water often contains dissolved gases such as N2, O2, and CO2. These gases will be heated to 80 degrees Celsius in the electrolytic cell, but the N2, O2, CO2 and other gases inside will precipitate from the electrolytic cell. These impurities will mix into the hydrogen produced by electrolysis, resulting in low hydrogen purity.

[0004] Therefore, a water replenishing device for improving the purity of hydrogen is proposed. Utility Model Content

[0005] In order to solve the problem of low purity of hydrogen produced by electrolysis in an electrolytic cell after deionized water is directly added to concentrated electrolyte proposed in the above background technology, the purpose of the present utility model is to provide a water replenishing device for improving the purity of hydrogen.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a water replenishing device for improving the purity of hydrogen, comprising a temperature exchange shell, a temperature exchange pipe is provided inside the temperature exchange shell, and an electrolyte liquid inlet pipe and an electrolyte liquid outlet pipe are respectively installed at both ends of the temperature exchange pipe, and the electrolyte liquid inlet pipe and the electrolyte liquid outlet pipe are respectively fixedly installed at the two ends of the temperature exchange shell, and the temperature exchange shell is also installed with a collecting shell, and the temperature exchange shell is connected to the inside of the collecting shell, and the collecting shell is installed with a water inlet pipe and an air outlet pipe, and the temperature exchange shell is also installed with a first water outlet pipe, and the first water outlet pipe is arranged vertically downward.

[0007] Preferably, the temperature exchange shell is in a capsule shape, and the temperature exchange tube is in a spiral shape.

[0008] Preferably, the water inlet pipe and the air outlet pipe are arranged vertically upward, the air outlet pipe is arranged higher than the water inlet pipe, and the lower end of the water inlet pipe extends into the temperature exchange shell.

[0009] Preferably, a temperature-exchange sleeve is sleeved and fixedly installed on the electrolyte liquid inlet pipe, the temperature-exchange shell is connected to the temperature-exchange sleeve through a connecting pipe, and a second water outlet pipe is cooperatively installed on the temperature-exchange sleeve.

[0010] Preferably, a waterproof pipe is installed on the temperature exchange shell, and a heating pipe is installed on the waterproof pipe.

[0011] Preferably, the heating pipe is located inside the temperature exchange shell, and the heating pipe and the temperature exchange shell are coaxially arranged.

[0012] Preferably, a plurality of sets of temperature-exchanging fins are mounted on the heating tube.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. When the present invention is in use, concentrated electrolyte is filled into the temperature exchange tube through the electrolyte liquid inlet pipe, and then deionized water with a lower temperature is filled into the temperature exchange shell through the water inlet pipe. The deionized water with a lower temperature exchanges heat with the concentrated electrolyte with a higher temperature in the temperature exchange tube, so that the temperature of the deionized water in the temperature exchange shell increases, and the N2, O2, and CO2 gases dissolved in the deionized water are precipitated from the deionized water. The deionized water is then degassing treated, so that the deionized water is added to the concentrated electrolyte to dilute the electrolyte. When the diluted electrolyte reaches the set temperature (80 degrees Celsius) in the electrolytic cell, it can no longer precipitate impurities, thereby improving the purity of the hydrogen precipitated from the electrolytic cell.

[0015] 2. When the present invention is in use, if the temperature of the liquid discharged from the first water outlet pipe does not reach the set temperature, the concentrated electrolyte in the temperature exchange shell can be heated by the heating tube. The temperature exchange fins can increase the heat exchange rate between the heating tube and the concentrated electrolyte in the temperature exchange tube, thereby effectively improving the purity of the hydrogen produced by electrolysis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a basic structural diagram of a water replenishing device for improving hydrogen purity in the present utility model.

[0017] Figure 2 This utility model is a water replenishing device for improving the purity of hydrogen Figure 1 main view.

[0018] Figure 3 This is a schematic diagram of liquid flow when using a water replenishing device for improving hydrogen purity according to the present invention.

[0019] Figure 4 This is another basic structural diagram of a water replenishing device for improving hydrogen purity in the present invention.

[0020] Figure 5 This utility model is a water replenishing device for improving the purity of hydrogen Figure 4 main view.

[0021] In the figure: 101, temperature exchange shell; 102, collecting shell; 103, electrolyte liquid inlet pipe; 104, electrolyte liquid outlet pipe; 105, water inlet pipe; 106, air outlet pipe; 107, first water outlet pipe; 108, temperature exchange pipe; 109, temperature exchange jacket; 110, second water outlet pipe; 111, connecting pipe; 112, waterproof pipe; 113, heating pipe; 114, temperature exchange fins. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 1 、 Figure 2 and Figure 3 As shown, the present embodiment provides a water replenishing device for improving the purity of hydrogen, including a temperature exchange shell 101. A temperature exchange tube 108 is provided inside the temperature exchange shell 101. The temperature exchange tube 108 is spiral-shaped. The spiral temperature exchange tube 108 can transfer more heat from the temperature exchange tube 108 to the deionized water in the temperature exchange shell 101 more quickly, and can reduce the temperature loss of the temperature exchange tube 108. In the present embodiment, an insulation shell is further installed on the outside of the temperature exchange shell 101. The insulation shell is used to prevent heat loss, and the insulation shell is conventional existing technology and is not shown in the figure.

[0025] The two ends of the temperature exchange tube 108 are respectively equipped with an electrolyte liquid inlet pipe 103 and an electrolyte liquid outlet pipe 104 . The electrolyte liquid inlet pipe 103 and the electrolyte liquid outlet pipe 104 are respectively fixedly installed at the two ends of the temperature exchange shell 101 .

[0026] A collecting shell 102 is also installed on the temperature exchange shell 101. The temperature exchange shell 101 is connected to the interior of the collecting shell 102. The temperature exchange shell 101 is capsule-shaped. A water inlet pipe 105 and an air outlet pipe 106 are installed on the collecting shell 102. The water inlet pipe 105 and the air outlet pipe 106 are arranged vertically upward. The air outlet pipe 106 is higher than the water inlet pipe 105, which can better discharge the impurities. The lower end of the water inlet pipe 105 extends to the interior of the temperature exchange shell 101. When this embodiment is in use, the lower end of the water inlet pipe 105 extends to the deionized water in the temperature exchange shell 101. The N2, O2, and CO2 escaping from the water will fill the collecting shell 102 and then be discharged through the air outlet pipe 106.

[0027] A first water outlet pipe 107 is also installed on the temperature exchange shell 101. The first water outlet pipe 107 is arranged vertically downward. In this embodiment, the first water outlet pipe 107 is connected to the pump body and is used to transfer the heated liquid to the concentrated electrolyte used in the electrolyzer, and then dilute the concentrated electrolyte and transfer it to the electrolyzer for electrolytic hydrogen production.

[0028] Before using this embodiment, the utility model is installed in the electrolysis system, and concentrated electrolyte is filled into the temperature exchange tube 108 through the electrolyte liquid inlet pipe 103, and then deionized water with a lower temperature is filled into the temperature exchange shell 101 through the water inlet pipe 105. The deionized water with a lower temperature exchanges heat with the concentrated electrolyte with a higher temperature in the temperature exchange tube 108, so that the temperature of the deionized water in the temperature exchange shell 101 increases, and the N2, O2, and CO2 gases dissolved in the deionized water are precipitated from the deionized water. The deionized water is exhaust-treated, so that the deionized water is added to the concentrated electrolyte to dilute the electrolyte. When the diluted electrolyte reaches the set temperature (80 degrees Celsius) in the electrolytic cell, it can no longer precipitate impurities, which can improve the purity of the hydrogen precipitated from the electrolytic cell.

[0029] Example 2

[0030] Reference Figure 1-5 , which is different from Example 1, is that, based on Example 1, a temperature exchange jacket 109 is sleeved and fixedly installed on the electrolyte liquid inlet pipe 103, the temperature exchange shell 101 is connected to the temperature exchange jacket 109 through a connecting pipe 111, and a second water outlet pipe 110 is installed on the temperature exchange jacket 109. In this embodiment, the temperature exchange pipe 108 can, on the one hand, keep the concentrated electrode liquid warm in the electrolyte liquid inlet pipe 103, and on the other hand, prevent the deionized water entering the electrolysis system from losing temperature significantly.

[0031] A waterproof pipe 112 is installed on the temperature exchange shell 101, and a heating pipe 113 is installed on the waterproof pipe 112. The heating pipe 113 is located inside the temperature exchange shell 101, and the heating pipe 113 is coaxially arranged with the temperature exchange shell 101. A plurality of groups of temperature exchange fins 114 are installed on the heating pipe 113. The temperature exchange fins 114 are made of red copper with high thermal conductivity. In this embodiment, if the temperature of the liquid discharged from the first water outlet pipe 107 does not reach the set 80 degrees, the concentrated electrolyte in the temperature exchange shell 101 can be heated by the heating pipe 113. The temperature exchange fins 114 can increase the heat exchange rate between the heating pipe 113 and the concentrated electrolyte in the temperature exchange pipe 108.

[0032] It should be further explained that before use, the present invention is installed in the electrolysis system, concentrated electrolyte is filled into the temperature exchange tube 108 through the electrolyte liquid inlet pipe 103, and then deionized water with a lower temperature is filled into the temperature exchange shell 101 through the water inlet pipe 105. The deionized water with a lower temperature exchanges heat with the concentrated electrolyte with a higher temperature in the temperature exchange tube 108, so that the temperature of the deionized water in the temperature exchange shell 101 is raised to the operating temperature (rated at 80 degrees Celsius in this embodiment), so that the N2, O2, and CO2 gases dissolved in the deionized water are precipitated from the deionized water. Deionized water is exhaust-treated so that it is added to the concentrated electrolyte to dilute the electrolyte. If the temperature of the liquid discharged from the first water outlet pipe 107 does not reach the set 80 degrees, the concentrated electrolyte in the temperature exchange shell 101 can be heated by the heating pipe 113. The temperature exchange fins 114 can increase the heat exchange rate between the heating pipe 113 and the concentrated electrolyte in the temperature exchange pipe 108, thereby effectively preventing the problem of N2, O2, and CO2 gases in the deionized water not being fully analyzed, thereby improving the purity of the hydrogen produced by electrolysis, and the generated impurities are discharged through the outlet pipe 106.

[0033] In this document, relational terms such as first and second, etc., are used solely to distinguish one entity or operation from another entity or operation and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or that are inherent to such process, method, article, or apparatus.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A water replenishing device for improving hydrogen purity, characterized by: The invention comprises a temperature exchange shell (101), wherein a temperature exchange pipe (108) is provided inside the temperature exchange shell (101), and an electrolyte liquid inlet pipe (103) and an electrolyte liquid outlet pipe (104) are respectively installed at both ends of the temperature exchange pipe (108), and the electrolyte liquid inlet pipe (103) and the electrolyte liquid outlet pipe (104) are respectively fixedly installed at the two ends of the temperature exchange shell (101). The temperature exchange shell (101) is also installed with a collection shell (102), and the temperature exchange shell (101) is communicated with the interior of the collection shell (102). The collection shell (102) is installed with a water inlet pipe (105) and an air outlet pipe (106). The temperature exchange shell (101) is also installed with a first water outlet pipe (107), and the first water outlet pipe (107) is arranged vertically downward.

2. A water replenishing device for improving hydrogen purity according to claim 1, characterized in that: The temperature exchange shell (101) is in a capsule shape, and the temperature exchange tube (108) is in a spiral shape.

3. A water replenishing device for improving hydrogen purity according to claim 1, characterized in that: The water inlet pipe (105) and the air outlet pipe (106) are arranged vertically upwards, the air outlet pipe (106) is arranged higher than the water inlet pipe (105), and the lower end of the water inlet pipe (105) extends into the temperature exchange shell (101).

4. A water replenishing device for improving hydrogen purity according to claim 1, characterized in that: A temperature-exchange jacket (109) is sleeved and fixedly mounted on the electrolyte liquid inlet pipe (103); the temperature-exchange shell (101) is connected to the temperature-exchange jacket (109) via a connecting pipe (111); and a second water outlet pipe (110) is cooperatively mounted on the temperature-exchange jacket (109).

5. A water replenishing device for improving hydrogen purity according to claim 4, characterized in that: A waterproof pipe (112) is installed on the temperature exchange shell (101), and a heating pipe (113) is installed on the waterproof pipe (112).

6. A water replenishing device for improving hydrogen purity according to claim 5, characterized in that: The heating pipe (113) is located inside the temperature exchange shell (101), and the heating pipe (113) and the temperature exchange shell (101) are coaxially arranged.

7. A water replenishing device for improving hydrogen purity according to claim 6, characterized in that: The heating tube (113) is cooperatively mounted with a plurality of groups of temperature-exchanging fins (114).

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