Safety detection system of electrolytic cell

Abstract

The utility model relates to a safety detection system of an electrolytic bath, which comprises a detection pipeline and a separation pipeline, one end of the detection pipeline and one end of the separation pipeline are both connected with a gas-water outlet of the electrolytic bath, and the other end of the detection pipeline and the other end of the separation pipeline are both connected with a flow meter; the detection pipeline comprises a stop valve, a detection pipeline gas-water separation tank, a detection pipeline drying pipe, an oxyhydrogen analyzer and a detection pipeline one-way valve, one end of the stop valve is connected with a gas-water outlet of the electrolytic bath, an inlet of the detection pipeline gas-water separation tank is connected with the other end of the stop valve, and an outlet of the detection pipeline gas-water separation tank is connected with one end of the detection pipeline drying pipe; the other end of the detection pipeline drying pipe is connected with one end of the hydrogen-oxygen analyzer, and the other end of the detection pipeline one-way valve is connected with the flowmeter. According to the utility model, the branch close to the outlet of the electrolytic cell is dried and the concentration of hydrogen / oxygen in hydrogen is measured, so that the purity of the product gas is rapidly detected and the safety of personnel and equipment is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electrolytic hydrogen production technical field, especially relate to a safety detection system of electrolytic tank. BACKGROUND

[0002] As a clean energy, hydrogen energy has become an important measure of national energy transformation. PEM / alkaline water electrolysis hydrogen production, as a relatively mature hydrogen production method, has attracted more and more attention. After the PEM / alkaline electrolytic tank is powered on, the reaction water will be electrolyzed into hydrogen and oxygen. In order to reduce the cost of the gas compressor at the gas end, the gas production pressure of the electrolytic tank is gradually increased, which will result in a higher oxygen concentration in the product gas, which may exceed the safe explosion limit.

[0003] Usually, in order to ensure safety, an oxygen-in-hydrogen and hydrogen-in-oxygen analyzer is added to the equipment for oxygen / hydrogen concentration detection in the system or test bench, but it is usually located after the gas-liquid separation tank. When the electrolytic tank works at a low current density, i.e. just after starting or when the renewable energy power generation is low, the oxygen-in-hydrogen concentration is often higher than when it works at the rated state. In addition, due to the length and volume of the system or pipeline, the oxygen-in-hydrogen / hydrogen-in-oxygen concentration test lags about 10 minutes (depending on the length and volume of the pipeline), which cannot be monitored in real time, posing a great hidden danger to equipment and personnel safety. SUMMARY

[0004] The utility model provides a kind of safety detection system of electrolytic tank, to solve the problem that the hydrogen-oxygen concentration test lag mentioned in background art leads to monitoring delay.

[0005] The technical scheme of the utility model is as follows: a kind of safety detection system of electrolytic tank, comprising: detection pipeline and separation pipeline, one end of the detection pipeline and one end of the separation pipeline are connected with the gas-water outlet of electrolytic tank, the other end of the detection pipeline and the other end of the separation pipeline are connected with flowmeter;

[0006] The detection pipeline includes a stop valve, a detection pipeline gas-water separation tank, a detection pipeline drying pipe, a hydrogen-oxygen analyzer and a detection pipeline check valve, one end of the stop valve is connected with the gas-water outlet of the electrolytic tank, the inlet of the detection pipeline gas-water separation tank is connected with the other end of the stop valve, the outlet of the detection pipeline gas-water separation tank is connected with one end of the detection pipeline drying pipe, the other end of the detection pipeline drying pipe is connected with one end of the hydrogen-oxygen analyzer, the other end of the hydrogen-oxygen analyzer is connected with one end of the detection pipeline check valve, the other end of the detection pipeline check valve is connected with the flowmeter.

[0007] Further, a pressure reducing valve and a detection pipeline heat exchanger are provided between the stop valve and the detection pipeline gas-water separation tank.

[0008] Further, the detection pipeline is provided with a detection pipeline filter and a rotor flow meter between the detection pipeline dry pipe and the hydrogen oxygen analyzer.

[0009] Further, the separation pipeline comprises a gas-water separation assembly, a back pressure valve, a separation pipeline dry pipe and a separation pipeline filter, one end of the gas-water separation assembly is connected with the gas-water outlet of the electrolytic tank, the other end of the gas-water separation assembly is connected with one end of the back pressure valve, the other end of the back pressure valve is connected with one end of the separation pipeline dry pipe, the other end of the separation pipeline dry pipe is connected with one end of the separation pipeline filter, and the other end of the separation pipeline filter is connected with the flow meter.

[0010] Further, the gas-water separation assembly comprises a first-stage gas-water separation tank, a separation pipeline heat exchanger and a second-stage gas-water separation tank, the inlet of the first-stage gas-water separation tank is connected with the gas-water outlet of the electrolytic tank, the outlet of the first-stage gas-water separation tank is connected with one end of the separation pipeline heat exchanger, the other end of the separation pipeline heat exchanger is connected with the inlet of the second-stage gas-water separation tank, and the outlet of the second-stage gas-water separation tank is connected with one end of the back pressure valve.

[0011] Further, the gas-water outlet of the electrolytic tank is provided with a first temperature sensor and a pressure sensor.

[0012] Further, the front end of the flow meter is provided with a second temperature sensor and a humidity sensor, and the rear end of the flow meter is provided with a check valve.

[0013] The beneficial effects of the present application are as follows: the detection pipeline is arranged, the gas-water separation tank in the detection pipeline separates part of the gas-water at the outlet of the electrolytic tank, the hydrogen oxygen concentration in the part of the gas-water is analyzed, the detection speed of the oxygen hydrogen concentration under the current working condition is improved, the detection pipeline and the separation pipeline are combined, and the total gas production flow is counted by the flow meter. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the present application. DETAILED DESCRIPTION

[0015] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely in combination 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, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person 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 block diagram provided according to the specific structure of the safety detection system of the electrolytic cell of the utility model, it needs to be noted that all solid lines in the figure are pipelines, and various components are communicated through the pipelines, as shown in the figure, Figure 1 The utility model discloses a kind of safety detection systems of electrolytic cell, and it includes:

[0017] Detection pipeline and separation pipeline, one end of the detection pipeline and one end of the separation pipeline are connected with the gas-water outlet of electrolytic cell 1, the other end of the detection pipeline and the other end of the separation pipeline are connected with flowmeter 21.

[0018] The detection pipeline includes: stop valve, detection pipeline gas-water separation tank 7, detection pipeline drying pipe 12, hydrogen-oxygen analyzer 15 and detection pipeline check valve 16, one end of the stop valve 4 is connected with the gas-water outlet of the electrolytic cell 1, the inlet of the detection pipeline gas-water separation tank 7 is connected with the other end of the stop valve 4, the outlet of the detection pipeline gas-water separation tank 7 is connected with one end of the detection pipeline drying pipe 12, the other end of the detection pipeline drying pipe 12 is connected with one end of the hydrogen-oxygen analyzer 15, the other end of the hydrogen-oxygen analyzer 15 is connected with one end of the detection pipeline check valve 16, the other end of the detection pipeline check valve 16 is connected with the flowmeter 21.

[0019] In an embodiment of the utility model, pressure reducing valve 5 and detection pipeline heat exchanger 6 are arranged between stop valve 4 and detection pipeline gas-water separation tank 7.

[0020] In an embodiment of the utility model, detection pipeline filter 13 and rotor flowmeter 14 are arranged between detection pipeline drying pipe 12 and hydrogen-oxygen analyzer 15.

[0021] In an embodiment of the utility model, the separation pipeline includes: gas-water separation assembly, back pressure valve 11, separation pipeline drying pipe 17 and separation pipeline filter 18, one end of the gas-water separation assembly is connected with the gas-water outlet of the electrolytic cell 1, the other end of the gas-water separation assembly is connected with one end of the back pressure valve 11, the other end of the back pressure valve 11 is connected with one end of the separation pipeline drying pipe 17, the other end of the separation pipeline drying pipe 17 is connected with one end of the separation pipeline filter 18, the other end of the separation pipeline filter 18 is connected with the flowmeter 21.

[0022] In an embodiment of the utility model, the gas-water separation assembly comprises: a first-stage gas-water separation tank 8, a separation pipeline heat exchanger 9 and a second-stage gas-water separation tank 10, the inlet of the first-stage gas-water separation tank 8 is connected with the gas-water outlet of the electrolytic tank 1, one end of the outlet of the first-stage gas-water separation tank 8 is connected with the separation pipeline heat exchanger 9, the other end of the separation pipeline heat exchanger 9 is connected with the inlet of the second-stage gas-water separation tank 10, and one end of the outlet of the second-stage gas-water separation tank 10 is connected with the back pressure valve 11.

[0023] In an embodiment of the utility model, the gas-water outlet of the electrolytic tank 1 is provided with a first temperature sensor 2 and a pressure sensor 3.

[0024] In an embodiment of the utility model, the front end of the flow meter 21 is provided with a second temperature sensor 19 and a humidity sensor 20, and the rear end of the flow meter 21 is provided with a one-way valve 22.

[0025] The specific working process of the utility model is as follows: the gas generated by the electrolytic tank is divided into two parts, one part of the gas is removed from the water in the product gas after passing through the detection pipeline gas-water separation tank 7 and the detection pipeline drying pipe 12, and the hydrogen in oxygen or the oxygen in hydrogen is tested at the hydrogen-oxygen analyzer 15

[0026] The other part of the gas is combined with the gas whose test is completed in the last part after being separated by the first-stage gas-water separation tank and the second-stage gas-water separation tank, and the product gas flow is measured at the flow meter 21. The utility model measures the hydrogen in oxygen / oxygen in hydrogen concentration by branching the drying pipe near the outlet of the electrolytic tank, rapidly detects the purity of the product gas, and guarantees the safety of personnel and equipment.

[0027] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical scheme of the utility model and not to limit, 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, and all should be covered in the claim range of the utility model.

Claims

1. A safety detection system for an electrolytic cell, characterized by, The utility model relates to a kind of electrolytic tank and its gas-water separation system, including: Detection pipeline and separation pipeline, one end of the detection pipeline and one end of the separation pipeline are connected electrolytic tank (1) gas-water outlet, the other end of the detection pipeline and the other end of the separation pipeline are connected flowmeter (21); The detection pipeline includes: stop valve (4), detection pipeline gas-water separation tank (7), detection pipeline drying pipe (12), hydrogen-oxygen analyzer (15) and detection pipeline check valve (16), one end of the stop valve (4) is connected with the gas-water outlet of the electrolytic tank (1), the inlet of the detection pipeline gas-water separation tank (7) is connected with the other end of the stop valve (4), the outlet of the detection pipeline gas-water separation tank (7) is connected with one end of the detection pipeline drying pipe (12), the other end of the detection pipeline drying pipe (12) is connected with one end of the hydrogen-oxygen analyzer (15), the other end of the hydrogen-oxygen analyzer (15) is connected with one end of the detection pipeline check valve (16), the other end of the detection pipeline check valve (16) is connected with the flowmeter (21).

2. The safety detection system for an electrolytic cell of claim 1, wherein, A pressure reducing valve (5) and a detection pipeline heat exchanger (6) are arranged between the stop valve (4) and the detection pipeline gas-water separation tank (7).

3. The safety detection system for an electrolytic cell of claim 1, wherein, A detection pipeline filter (13) and a rotameter (14) are arranged between the detection pipeline drying pipe (12) and the hydrogen-oxygen analyzer (15).

4. The safety detection system for an electrolytic cell of claim 1, wherein, The separation pipeline includes: a gas-water separation assembly, a back pressure valve (11), a separation pipeline drying pipe (17) and a separation pipeline filter (18), one end of the gas-water separation assembly is connected with the gas-water outlet of the electrolytic tank (1), the other end of the gas-water separation assembly is connected with one end of the back pressure valve (11), the other end of the back pressure valve (11) is connected with one end of the separation pipeline drying pipe (17), the other end of the separation pipeline drying pipe (17) is connected with one end of the separation pipeline filter (18), the other end of the separation pipeline filter (18) is connected with the flowmeter (21).

5. The safety detection system for an electrolytic cell of claim 4, wherein, The gas-water separation assembly includes: a first-stage gas-water separation tank (8), a separation pipeline heat exchanger (9) and a second-stage gas-water separation tank (10), the inlet of the first-stage gas-water separation tank (8) is connected with the gas-water outlet of the electrolytic tank (1), the outlet of the first-stage gas-water separation tank (8) is connected with one end of the separation pipeline heat exchanger (9), the other end of the separation pipeline heat exchanger (9) is connected with the inlet of the second-stage gas-water separation tank (10), the outlet of the second-stage gas-water separation tank (10) is connected with one end of the back pressure valve (11).

6. The safety detection system for an electrolytic cell of claim 1, wherein, The gas-water outlet of the electrolytic tank (1) is provided with a first temperature sensor (2) and a pressure sensor (3).

7. The safety detection system for an electrolytic cell of claim 1, wherein, The front end of the flowmeter (21) is provided with a second temperature sensor (19) and a humidity sensor (20), and the rear end of the flowmeter (21) is provided with a check valve (22).

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