Water supply system of electrolytic bath

Abstract

The utility model relates to a water supply system of an electrolytic bath, which comprises a water tank, a temperature adjusting pipeline, a water return pipeline and a flow adjusting pipeline, a water outlet of the water tank is connected with one end of the temperature adjusting pipeline, and the other end of the temperature adjusting pipeline is connected with one end of the water return pipeline and one end of the flow adjusting pipeline. The other end of the water return pipeline is connected with the water return port of the water tank; the temperature adjusting pipeline comprises a circulating pump, a heat exchanger and a plurality of heating branches, a water inlet of the circulating pump is connected with a water outlet of the water tank and one end of each heating branch, the other end of each heating branch is connected with a water inlet of the heat exchanger, and a water outlet of the heat exchanger is connected with one end of the flow adjusting pipeline. According to the utility model, the plurality of heating branches are arranged and are used for heating water, so that the stability of temperature rise can be ensured, and the water is cooled through the heat exchanger, so that the stability of temperature reduction is ensured, and the stability of the temperature of inlet water of the electrolytic bath is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrolytic hydrogen production technical field especially, relates to a water supply system of electrolytic cell. BACKGROUND

[0002] As a clean energy, hydrogen energy has become an important measure of national energy transformation. PEM / alkaline electrolytic water hydrogen production, as a relatively mature hydrogen production method, has attracted more and more attention. After the PEM / alkaline electrolytic cell is powered on, the reaction water will be electrolyzed into hydrogen and oxygen. When the PEM electrolytic cell is working, the electrolytic water system / test bench will preheat the water in the water tank to a set temperature and then pass it into the electrolytic cell. The oxygen generated on the anode side of the electrolytic cell and the excess water will be returned to the water tank after gas-liquid separation and continue to circulate and heat to be passed into the electrolytic cell. The water inlet temperature of the electrolytic cell has a great influence on the performance and durability of the catalyst and membrane electrode in the electrolytic cell, which directly affects the performance and service life of the electrolytic cell. Therefore, during the operation of the electrolytic cell, it is necessary to ensure the stability of the water inlet temperature. In order to ensure the working efficiency of the electrolytic cell or adjust the operating conditions of the electrolytic cell, the heating / cooling rate of the water is often required to be 5℃ / min, but a high-power heater / a large-capacity plate exchanger often leads to temperature overshoot and requires a long stabilization time, which directly affects the test efficiency and the performance stability of the electrolytic cell. SUMMARY

[0003] The utility model provides a water supply system of electrolytic cell for solving the technical problem that the high -power heater / large -capacity plate change of adopting in the background art often leads to temperature overshoot and needs long stabilization time.

[0004] The technical scheme of the utility model is as follows: a water supply system of electrolytic cell, including water tank, temperature regulation pipeline, backwater pipeline and flow regulation pipeline, the water outlet of water tank connects one end of temperature regulation pipeline, the other end of temperature regulation pipeline connects one end of backwater pipeline and one end of flow regulation pipeline, the other end of backwater pipeline connects the backwater of water tank, the other end of flow regulation pipeline connects electrolytic cell;

[0005] Temperature regulation pipeline includes circulating pump, heat exchanger and a plurality of heating branch, the water inlet of circulating pump connects the water outlet of water tank, the water inlet of circulating pump connects one end of each heating branch, the other end of each heating branch all connects the water inlet of heat exchanger, the water outlet of heat exchanger connects one end of flow regulation pipeline;

[0006] The heating branch is used for heating the water flowing through the heating branch, and the heat exchanger is used for cooling the water flowing through the heat exchanger.

[0007] Further, the heating branch comprises a heating branch stop valve, an electric heater and a one-way valve, one end of the heating branch is connected with the water outlet of the circulating pump, the other end of the heating branch stop valve is connected with the water inlet of the electric heater, the water outlet of the electric heater is connected with one end of the one-way valve, and the other end of the one-way valve is connected with the water inlet of the heat exchanger.

[0008] Further, the water tank is provided with a water tank temperature sensor, the water tank temperature sensor, the electric heater and the heat exchanger are connected with a controller, when the water tank temperature sensor detects that the temperature is less than a set temperature, the electric heater is started and the cooling liquid valve of the heat exchanger is closed, when the water tank temperature sensor detects that the temperature is greater than the set temperature, the cooling liquid valve of the heat exchanger is opened and the electric heater is closed.

[0009] Further, the backwater pipeline comprises a backwater stop valve and a throttle valve, one end of the throttle valve is connected with the backwater outlet of the water tank, the other end of the throttle valve is connected with one end of the backwater stop valve, and the other end of the backwater stop valve is connected with one end of the flow regulation pipeline.

[0010] Further, the flow regulation pipeline comprises a flow regulation valve, a flow meter and a flow regulation pipeline stop valve, one end of the flow regulation valve is connected with the other end of the temperature regulation pipeline and the other end of the backwater pipeline, the other end of the flow regulation valve is connected with one end of the flow meter, the other end of the flow meter is connected with one end of the flow regulation pipeline stop valve, and the other end of the flow regulation pipeline stop valve is connected with the electrolytic cell.

[0011] Further, temperature sensors are arranged at the first end and the last end of the flow regulation pipeline, and a pressure sensor is arranged at the last end of the flow regulation pipeline.

[0012] Further, a filter is arranged between the flow meter and the flow regulation pipeline stop valve.

[0013] The beneficial effects of the utility model are as follows: the utility model is provided with multiple heating branches, water is heated by the multiple heating branches, the stability of temperature rise is guaranteed, the water is cooled by the heat exchanger, the stability of temperature drop is guaranteed, and thus the water temperature stability of electrolytic cell water inlet is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] In order for those skilled in the art to better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application, and the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0016] In the embodiments of the present application, Figure 1 is a structural schematic diagram provided according to the specific structure of the water supply system of the electrolytic cell of the present application, and it should be noted that all the solid lines connected in the figure are water pipes. As shown in Figure 1 , the present application comprises:

[0017] comprising a water tank 1, a temperature adjusting pipeline 23, a backwater pipeline 24 and a flow adjusting pipeline 25, one end of the water outlet of the water tank 1 is connected with the temperature adjusting pipeline 23, the other end of the temperature adjusting pipeline 23 is connected with one end of the backwater pipeline 24 and one end of the flow adjusting pipeline 25, the other end of the backwater pipeline 24 is connected with the backwater inlet of the water tank 1, and the other end of the flow adjusting pipeline 25 is connected with the electrolytic cell 22;

[0018] The temperature adjusting pipeline 23 comprises a circulating pump 2, a heat exchanger 12 and a plurality of heating branches 26, the water inlet of the circulating pump 2 is connected with the water outlet of the water tank 1, the water inlet of the circulating pump 2 is connected with one end of each of the heating branches 26, the other end of each of the heating branches 26 is connected with the water inlet of the heat exchanger 12, and the water outlet of the heat exchanger 12 is connected with one end of the flow adjusting pipeline 25;

[0019] The heating branch 26 is used for heating the water flowing through the heating branch 26, and the heat exchanger 12 is used for cooling the water flowing through the heat exchanger 12.

[0020] In one embodiment of the present application, the heating branch 26 comprises a heating branch stop valve, an electric heater and a check valve, one end of the heating branch 26 is connected with the water outlet of the circulating pump 2, the other end of the heating branch stop valve is connected with the water inlet of the electric heater, the water outlet of the electric heater is connected with one end of the check valve, and the other end of the check valve is connected with the water inlet of the heat exchanger 12. Among them, the heating branch stop valve is used for controlling the opening and closing of the branch, the check valve ensures that no backwater is reversely connected into the heating branch 26, and the electric heater is used for heating the water passing through the branch. It should be noted that the number of the heating branch 26 is greater than or equal to 2, and three heating branches 26 are shown in the figure. Figure 1In the middle, the reference signs 3, 6, 9 are heating branch stop valves, the reference signs 4, 7, 10 are electric heaters, and the reference signs 5, 8, 11 are check valves.

[0021] Specifically, the water tank 1 is provided with a water tank temperature sensor, the water tank temperature sensor, the electric heater and the heat exchanger 12 are all connected with a controller, specifically, a cooling liquid valve of the heat exchanger 12 is connected with the controller, and the opening and closing of the cooling liquid valve is controlled by the controller, so as to control whether the cooling liquid is introduced into the heat exchanger 12, when the cooling liquid is introduced, heat exchange cooling is realized, and when the cooling liquid is not introduced, the temperature of the heating branch 26 is unchanged.

[0022] In an embodiment of the utility model, the flow regulation pipeline 25 includes flow regulation valve 16, flow meter 17 and flow regulation pipeline stop valve 19, one end of flow regulation valve 16 is connected with the other end of temperature regulation pipeline 23 and the other end of backwater pipeline 24, the other end of flow regulation valve 16 is connected with one end of flow meter 17, the other end of flow meter 17 is connected with one end of flow regulation pipeline stop valve 19, the other end of flow regulation pipeline stop valve 19 is connected with electrolytic cell 22.

[0023] In an embodiment of the utility model, the first end and the terminal end of the flow regulation pipeline 25 are both provided with temperature sensors, and the terminal end of the flow regulation pipeline 25 is provided with a pressure sensor 21. The temperature sensors and the pressure sensor 21 can be connected with a controller to realize unified control by the controller. Figure 1 In the middle, the reference signs 15 and 20 are temperature sensors.

[0024] In an embodiment of the utility model, a filter 18 is arranged between the flow meter 17 and the flow regulation pipeline stop valve 19, and the filter 18 realizes filtration of water flowing in the pipeline.

[0025] In an embodiment of the utility model, the backwater pipeline 24 includes a backwater stop valve 14 and a throttle valve 13, one end of the throttle valve 13 is connected with a backwater inlet of the water tank 1, the other end of the throttle valve 13 is connected with one end of the backwater stop valve 14, and the other end of the backwater stop valve 14 is connected with one end of the flow regulation pipeline 25.

[0026] It should be noted that in the utility model, various components are connected through water pipes to realize communication of various pipelines.

[0027] In the utility model, water in water tank 1 is circulated and heated to enter electrolytic cell 22, n (n≥2) heating branches 26 are used, each heating branch 26 contains a small power heater, whether to start or start several heating branches 26 is decided according to the set temperature and the expected temperature rising time, then the water passing through heating branch 26 is passed into heat exchanger, and the water meeting the set temperature requirement is passed into electrolytic cell 22.

[0028] The actual temperature in water tank 1 is x, the set temperature is y (y>x), at this time, several heating branches 26 are selected to be started according to the set temperature, the heater power and the expected temperature rising time, then the heated water enters the heat exchanger without starting the cooling function and the heat exchanger without starting the cooling liquid valve, and is detected by the temperature sensor at the head of flow regulating pipeline 25, when the temperature reaches y, is passed into electrolytic cell 22.

[0029] The actual temperature in water tank 1 is x, the set temperature is y (y<x), the water passes through the heating branch 26 without starting the electric heater, then the water enters the heat exchanger, is detected by the temperature sensor at the head of flow regulating pipeline 25, and is passed into electrolytic cell 22 after the water is cooled to y.

[0030] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical scheme of the utility model and are not limited, although the utility model is described in detail with reference to examples, those skilled in the art should understand that the technical scheme of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical scheme of the utility model, which should be covered in the claim range of the utility model.

Claims

1. A water supply system for an electrolytic cell, characterized by, The temperature regulating pipeline (23) includes a circulating pump (2), a heat exchanger (12) and a plurality of heating branches (26), the water outlet of the circulating pump (2) is connected with the water outlet of the water tank (1), the water inlet of the circulating pump (2) is connected with one end of each of the heating branches (26), the water inlets of the heat exchanger (12) are connected with the other ends of the heating branches (26), and one end of the flow regulating pipeline (25) is connected with the water outlet of the heat exchanger (12). The heating branch (26) is used for heating water flowing through the heating branch (26), and the heat exchanger (12) is used for cooling water flowing through the heat exchanger (12). The heating branch (26) includes a heating branch stop valve, an electric heater and a check valve, one end of the heating branch (26) is connected with the water outlet of the circulating pump (2), the water inlet of the electric heater is connected with the other end of the heating branch stop valve, one end of the check valve is connected with the water outlet of the electric heater, and the water inlet of the heat exchanger (12) is connected with the other end of the check valve.

2. A water supply system for an electrolytic cell as claimed in claim 1, wherein The water tank (1) is provided with a water tank temperature sensor, the water tank temperature sensor, the electric heater and the heat exchanger (12) are connected with a controller, when the water tank temperature sensor detects that the temperature is less than a set temperature, the electric heater is started and the cooling liquid valve of the heat exchanger (12) is closed, and when the water tank temperature sensor detects that the temperature is greater than the set temperature, the cooling liquid valve of the heat exchanger (12) is opened and the electric heater is closed.

3. A water supply system for an electrolytic cell as claimed in claim 2, wherein, The flow regulating pipeline (25) includes a flow regulating valve (16), a flow meter (17) and a flow regulating pipeline stop valve (19), one end of the flow regulating valve (16) is connected with the other end of the temperature regulating pipeline (23) and the other end of the backwater pipeline (24), one end of the flow meter (17) is connected with the other end of the flow regulating valve (16), the other end of the flow meter (17) is connected with one end of the flow regulating pipeline stop valve (19), and the other end of the flow regulating pipeline stop valve (19) is connected with the electrolytic tank (22).

4. A water supply system for an electrolytic cell as claimed in claim 2, wherein Temperature sensors are installed at the first end and the last end of the flow regulating pipeline (25), and a pressure sensor (21) is installed at the last end of the flow regulating pipeline (25).

5. A water supply system for an electrolytic cell as claimed in claim 4, wherein A filter (18) is arranged between the flow meter (17) and the flow regulating pipeline stop valve (19).

6. A water supply system for an electrolytic cell as claimed in claim 4, wherein ​ 7. A water supply system for an electrolytic cell as claimed in claim 1, wherein The return water pipeline (24) comprises a return water stop valve (14) and a throttle valve (13), one end of the throttle valve (13) is connected with the return water outlet of the water tank (1), the other end of the throttle valve (13) is connected with one end of the return water stop valve (14), and the other end of the return water stop valve (14) is connected with one end of the flow regulating pipeline (25).

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