Electrolytic gas production device and hydrogen chloride production system

Abstract

The utility model discloses an electrolytic gas production device and a hydrogen chloride production system. The electrolytic gas production device comprises an electrolytic cell which is divided into an anode chamber and a cathode chamber by an ion exchange membrane, an anode bar and a first gas outlet are arranged in the anode chamber, a cathode bar and a second gas outlet are arranged in the cathode chamber, and the anode bar and the cathode bar are respectively connected with the positive electrode and the negative electrode of a power supply; the first buffer chamber is communicated with the bottom of the anode chamber and forms a U-shaped structure; a first sealing pressure relief structure is arranged at the top of the first buffer chamber; the second buffer chamber is communicated with the bottom of the cathode chamber and forms a U-shaped structure; a second sealing pressure relief structure is arranged at the top of the second buffer chamber; and the first buffer chamber and the second buffer chamber are both higher than the electrolytic bath. According to the utility model, the buffer chamber higher than the electrolytic bath and the sealed pressure relief structure are introduced, so that the problems of pressure balance and liquid level fluctuation when a traditional U-shaped tube electrolysis device treats a positive pressure reactor are effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electrolytic gas making, in particular to electrolytic gas making device and hydrogen chloride production system. BACKGROUND

[0002] Hydrogen chloride is a very important chemical raw material, and the preparation of chlorine and hydrogen by electrolyzing sodium chloride solution is a main source of hydrogen chloride synthesis raw material. The U-shaped tube electrolysis device is used for preparing hydrogen and chlorine by electrolyzing brine in the laboratory at present, when chlorine or hydrogen is connected to the positive pressure reaction container, hydrogen and chlorine cannot enter the positive pressure reactor due to the pressure, and the liquid level of one end of the U-shaped tube rises and flows out of the U-shaped tube, resulting in that electrolysis cannot be carried out normally. SUMMARY

[0003] The utility model discloses an electrolytic gas making device and hydrogen chloride production system, which can solve the problem of electrolyte overflow in the prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model provides electrolytic gas making device at first, and the technical scheme is as follows:

[0005] The electrolytic gas making device is used for preparing reaction gas and introducing the reaction gas into the positive pressure reaction container. The electrolytic gas making device comprises an electrolytic cell which is divided into an anode chamber and a cathode chamber by an ion exchange membrane. An anode rod and a first gas outlet are arranged in the anode chamber, and a cathode rod and a second gas outlet are arranged in the cathode chamber. The anode rod and the cathode rod are connected with the positive and negative poles of a power supply respectively. The electrolytic gas making device further comprises: a first buffer chamber which is in communication with the bottom of the anode chamber and forms a U-shaped structure. A first sealing pressure relief structure is arranged at the top of the first buffer chamber. A second buffer chamber which is in communication with the bottom of the cathode chamber and forms a U-shaped structure. A second sealing pressure relief structure is arranged at the top of the second buffer chamber. The first buffer chamber and the second buffer chamber are higher than the electrolytic cell.

[0006] The electrolysis gas production device has the following advantages: (1) the first buffer chamber and the second buffer chamber are introduced and respectively penetrate the anode chamber and the cathode chamber of the electrolytic tank to form a U-shaped structure, which allows sufficient space and buffer to prevent excessive fluctuation of the electrolyte when introducing the gas into the positive pressure reactor, thereby better absorbing and relieving pressure fluctuation and preventing the electrolyte from overflowing; (2) the design that the buffer chamber is higher than the electrolytic tank increases the flow space of the electrolyte in the buffer chamber when the pressure changes, thereby greatly reducing the risk of overflow caused by liquid level change; and (3) the sealing pressure relief structure can separate gas and liquid, prevent the electrolyte from overflowing, safely release pressure in the case of overpressure, prevent the electrolytic device and the positive pressure reactor from being damaged or dangerous due to excessively high pressure, ensure the stability of the internal environment of the electrolytic tank, and enable the electrolysis process to continue.

[0007] Therefore, the utility model discloses a buffer chamber higher than the electrolytic tank and a sealing pressure relief structure are introduced, effectively solve the pressure balance and liquid level fluctuation problem encountered by the traditional U-shaped tube electrolytic device when processing the positive pressure reactor, ensure that chlorine and hydrogen can smoothly and continuously enter the positive pressure reaction container, so that the whole electrolysis process is efficient and stable, and the stability and safety of the system are significantly improved.

[0008] As a further improvement of the above-mentioned electrolysis gas production device: the first sealing pressure relief structure includes a first rubber plug and a first air release pipe; the second sealing pressure relief structure includes a second rubber plug and a second air release pipe. Therefore, the structure is simple, and easy to process, manufacture and install.

[0009] As a further improvement of the above-mentioned electrolysis gas production device: the electrolysis gas production device further includes a first gas inlet pipe connected to the first gas outlet and a positive pressure reaction container; and a second gas inlet pipe connected to the second gas outlet and the positive pressure reaction container.

[0010] As a further improvement of the above-mentioned electrolysis gas production device: the electrolysis gas production device further includes a valve assembly, the valve assembly includes a first gas-liquid separation valve, a second gas-liquid separation valve, a first one-way valve and a second one-way valve respectively arranged on the first air release pipe, the second air release pipe, the first gas inlet pipe and the second gas inlet pipe.

[0011] As a further improvement of the above-mentioned electrolysis gas production device: the valve assembly further includes a first air supplement valve connected to the first gas inlet pipe and a second air supplement valve connected to the second gas inlet pipe, and the first air supplement valve and the second air supplement valve are respectively connected to a corresponding gas storage tank. Therefore, the air supplement valve can automatically supplement gas when the electrolysis gas production speed is insufficient or suddenly interrupted, ensure the stable supply of reaction gas in the positive pressure reaction container, prevent the negative pressure in the reactor caused by insufficient gas supply of the electrolytic device, thereby avoiding backflow and other potential safety risks, make the system have higher flexibility and adaptability.

[0012] As a further improvement of the above-mentioned electrolytic gas production device: the electrolytic gas production device further comprises a pressure detection assembly, which comprises a first pressure sensor, a second pressure sensor, a third pressure sensor and a fourth pressure sensor respectively arranged in the anode chamber, the cathode chamber, the first buffer chamber and the second buffer chamber.

[0013] As a further improvement of the above-mentioned electrolytic gas production device: the electrolytic gas production device further comprises a controller, which controls the opening and closing degree of the valve assembly according to the values of the pressure detection assembly. Thus, the pressure balance between the electrolytic gas production device and the positive pressure reaction container can be more conveniently controlled, and the stability and safety of the electrolysis and synthesis reaction are improved.

[0014] As a further improvement of the above-mentioned electrolytic gas production device: the cross-sectional size and shape of the anode chamber, the cathode chamber, the first buffer chamber and the second buffer chamber are the same, and the volume ratio of the first buffer chamber to the anode chamber and the volume ratio of the second buffer chamber to the cathode chamber are (1.8-2.5):1. Thus, it is helpful to better absorb and buffer the instantaneous pressure change, especially when the pressure fluctuates due to the generation of gas during the electrolysis process, so that the gas accumulation and discharge are more stable, and the interference in the process of gas generation and discharge is reduced; the larger buffer capacity can also provide a larger pressure difference tolerance range in case of unexpected situations, further improving the overall safety and stability of the system.

[0015] In order to achieve the above-mentioned purpose, the hydrogen chloride production system is further provided according to the utility model, and the technical scheme is as follows:

[0016] The hydrogen chloride production system comprises a positive pressure reaction container for reacting chlorine gas and hydrogen gas, and further comprises the electrolytic gas production device of the first aspect. The reaction gas obtained after the electrolytic gas production device processes the sodium chloride solution in the electrolytic cell is chlorine gas and hydrogen gas.

[0017] The utility model will be further described below in combination with the drawings and specific embodiments. The additional aspects and advantages of the utility model will be partially given in the following description, partially become obvious from the following description, or be known through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings forming part of the utility model serve to assist the understanding of the utility model, and the content provided in the drawings and the related description thereof in the utility model can be used to explain the utility model, but do not constitute improper limitation on the utility model.

[0019] In the drawings:

[0020] Figure 1 It is a structural schematic view of the electrolytic gas production device of the embodiment 1 of the utility model.

[0021] Figure 2 Structure diagram of the electrolytic gas generation device of the embodiment 2 of the utility model.

[0022] Figure 3 Structure diagram of the electrolytic gas generation device of the embodiment 3 of the utility model.

[0023] The relevant marks in the above-mentioned drawings are:

[0024] 100-ion exchange membrane, 110-anode chamber, 120-cathode chamber, 130-anode rod, 140-cathode rod, 150-first gas outlet, 160-second gas outlet, 170-first gas inlet pipe, 180-second gas inlet pipe, 210-first buffer chamber, 220-second buffer chamber, 310-first rubber plug, 320-first air release pipe, 330-second rubber plug, 340-second air release pipe, 410-first gas-liquid separation valve, 420-second gas-liquid separation valve, 430-first check valve, 440-second check valve, 450-first air supplement valve, 460-second air supplement valve, 510-first pressure sensor, 520-second pressure sensor, 530-third pressure sensor, 540-fourth pressure sensor. DETAILED DESCRIPTION

[0025] The utility model will be explained clearly and completely in combination with the drawings. The person skilled in the art can realize the utility model based on these explanations. Before the utility model is explained in combination with the drawings, it needs to be pointed out specially:

[0026] The technical scheme and technical features provided in each part including the following explanation in the utility model can be combined mutually in the case of no conflict.

[0027] In addition, the embodiments of the utility model involved in the following explanation are generally only the embodiments of a part of the utility model, not all the embodiments. Therefore, all other embodiments obtained by the person skilled in the art based on the embodiments in the utility model without making creative labor should belong to the protection scope of the utility model.

[0028] About the terms and units in the utility model. The terms "include", "have" and any deformation thereof in the specification and claims of the utility model and the relevant part are intended to cover the non-exclusive inclusion.

[0029] Embodiment 1

[0030] Figure 1 Structure diagram of the electrolytic gas generation device of the embodiment.

[0031] As Figure 1The electrolytic gas generation device shown is used to prepare reaction gas and introduce reaction gas into a positive pressure reaction vessel. It includes an electrolytic cell divided into an anode chamber 110 and a cathode chamber 120 by an ion exchange membrane 100. An anode rod 130 and a first gas outlet 150 are provided in the anode chamber 110, and a cathode rod 140 and a second gas outlet 160 are provided in the cathode chamber 120. The anode rod 130 and the cathode rod 140 are respectively connected to the positive and negative terminals of a power source.

[0032] The electrolytic gasification device also includes a first buffer chamber 210, a second buffer chamber 220, a valve assembly, a pressure detection assembly, and a controller. The first buffer chamber 210 is connected to the bottom of the anode chamber 110, forming a U-shaped structure. The second buffer chamber 220 is connected to the bottom of the cathode chamber 120, also forming a U-shaped structure. Both the first buffer chamber 210 and the second buffer chamber 220 are higher than the electrolytic cell. The anode chamber 110, the cathode chamber 120, the first buffer chamber 210, and the second buffer chamber 220 have the same cross-sectional dimensions and shape. The volume ratio of the first buffer chamber 210 to the anode chamber 110 and the volume ratio of the second buffer chamber 220 to the cathode chamber 120 are 2:1.

[0033] A first sealing and pressure relief structure is provided at the top of the first buffer chamber 210, and the first sealing and pressure relief structure includes a first rubber plug 310 and a first vent pipe 320. A second sealing and pressure relief structure is provided at the top of the second buffer chamber 220, and the second sealing and pressure relief structure includes a second rubber plug 330 and a second vent pipe 340.

[0034] The valve assembly includes a first gas-liquid separation valve 410 and a second gas-liquid separation valve 420 respectively disposed on the first vent pipe 320 and the second vent pipe 340. The pressure detection assembly includes a first pressure sensor 510, a second pressure sensor 520, a third pressure sensor 530, and a fourth pressure sensor 540 respectively disposed in the anode chamber 110, the cathode chamber 120, the first buffer chamber 210, and the second buffer chamber 220. The controller controls the opening and closing degree of the valve assembly based on the values ​​from the pressure detection assembly.

[0035] Example 2

[0036] Figure 2 This is a schematic diagram of the electrolytic gas generation device in this embodiment.

[0037] Compared with Example 1, the electrolytic gasification device in this embodiment differs in that: Figure 2 As shown, the electrolytic gas generation device also includes a first inlet pipe 170 connecting the first outlet 150 and the positive pressure reaction vessel, and a second inlet pipe 180 connecting the second outlet 160 and the positive pressure reaction vessel. The valve assembly also includes a first one-way valve 430 and a second one-way valve 440 respectively disposed on the first inlet pipe 170 and the second inlet pipe 180.

[0038] Embodiment 3

[0039] Figure 3 A structure schematic view of the electrolytic gas production device of the present embodiment.

[0040] Compared with Embodiment 2, the electrolytic gas production device of the present embodiment has the difference that, as shown in the figure, the valve assembly further comprises a first air supplement valve 450 connected with the first gas inlet pipe 170 and a second air supplement valve 460 connected with the second gas inlet pipe 180, and the first air supplement valve 450 and the second air supplement valve 460 are respectively connected with corresponding gas storage tanks. Figure 3

[0041] The embodiment of the hydrogen chloride production system of the present utility model is composed of a positive pressure reaction container for chlorine and hydrogen reaction and the electrolytic gas production device of any one of the above embodiments, and the reaction gas obtained after the electrolytic gas production device processes the sodium chloride solution in the electrolytic tank is chlorine and hydrogen.

[0042] The relevant contents of the present utility model have been described above. The ordinary skilled in the art will be able to realize the present utility model based on these descriptions. Based on the above contents of the present utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor shall belong to the protection scope of the present utility model.​

Claims

1. An electrolysis device for preparing a reaction gas and feeding the reaction gas into a positive pressure reaction container, the electrolysis device comprising an electrolytic cell divided into an anode chamber (110) and a cathode chamber (120) by an ion exchange membrane (100), an anode rod (130) and a first gas outlet (150) being arranged in the anode chamber (110), a cathode rod (140) and a second gas outlet (160) being arranged in the cathode chamber (120), the anode rod (130) and the cathode rod (140) being connected to the positive and negative poles of a power supply respectively; characterized in that: The electrolytic gas production device further comprises: ​ a first buffer chamber (210) which is in communication with the bottom of the anode chamber (110) and forms a U-shaped structure; a first sealing and pressure relief structure is arranged at the top of the first buffer chamber (210); a second buffer chamber (220) which is in communication with the bottom of the cathode chamber (120) and forms a U-shaped structure; a second sealing and pressure relief structure is arranged at the top of the second buffer chamber (220); The first buffer chamber (210) and the second buffer chamber (220) are both higher than the electrolytic cell.

2. The electrolytic gas generating apparatus as claimed in claim 1, wherein: The first sealing and pressure relief structure comprises a first rubber plug (310) and a first air release pipe (320); the second sealing and pressure relief structure comprises a second rubber plug (330) and a second air release pipe (340).

3. The electrolysis gas generating device according to claim 2, wherein: The electrolytic gas production device further comprises a first gas inlet pipe (170) which is connected to the first gas outlet (150) and the positive pressure reaction container; and a second gas inlet pipe (180) which is connected to the second gas outlet (160) and the positive pressure reaction container.

4. The electrolysis gas generating device according to claim 3, wherein: The electrolytic gas production device further comprises a valve assembly which comprises a first gas-liquid separation valve (410), a second gas-liquid separation valve (420), a first one-way valve (430) and a second one-way valve (440) which are arranged on the first air release pipe (320), the second air release pipe (340), the first gas inlet pipe (170) and the second gas inlet pipe (180) respectively.

5. The electrolysis gas generating device as claimed in claim 4, characterized in that: The valve assembly further comprises a first air supplement valve (450) which is connected to the first gas inlet pipe (170) and a second air supplement valve (460) which is connected to the second gas inlet pipe (180); the first air supplement valve (450) and the second air supplement valve (460) are connected to corresponding gas storage tanks respectively.

6. The electrolysis gas generating device as claimed in claim 5, characterized in that: The electrolytic gas production device further comprises a pressure detection assembly which comprises a first pressure sensor (510), a second pressure sensor (520), a third pressure sensor (530) and a fourth pressure sensor (540) which are arranged in the anode chamber (110), the cathode chamber (120), the first buffer chamber (210) and the second buffer chamber (220) respectively.

7. The electrolysis gas generation device according to claim 6, characterized by: The electrolytic gas production device further comprises a controller which controls the opening and closing degree of the valve assembly according to the values of the pressure detection assembly.

8. The electrolysis gas generating device as claimed in claim 1, wherein: The anode chamber (110), the cathode chamber (120), the first buffer chamber (210) and the second buffer chamber (220) have the same size and shape in cross section; the volume ratio of the first buffer chamber (210) to the anode chamber (110) and the volume ratio of the second buffer chamber (220) to the cathode chamber (120) are (1.8-2.5):

1.

9. A system for producing hydrogen chloride comprising a positive pressure reaction vessel for reacting chlorine and hydrogen, characterized by: The electrolytic gas production device of any one of claims 1-8 is further provided; the reaction gas obtained after the electrolytic gas production device processes the sodium chloride solution in the electrolytic cell is chlorine and hydrogen.

Images