An apparatus for testing carbon reduction of electrolyzed water

Abstract

The present application relates to a kind of electrolytic water carbon reduction test device, mainly solve the technical problem of big electrolyte concentration fluctuation.Technical scheme: a kind of electrolytic water carbon reduction test device, including electrolytic cell, the electrolytic cell includes electrolytic cell cathode and electrolytic cell anode, carbon dioxide tank and nitrogen tank are sequentially connected electrolytic cell cathode input end through pipe line via humidification tank, ball valve of electrolytic cell cathode is connected cathode circulating tank through pipe line, cathode circulating tank input end is connected cathode separation tank through pipe line, cathode circulating tank input end is connected water tank through pipe line, cathode circulating tank output end is sequentially connected electrolytic cell cathode via pump, heating pipe, electrolytic cell cathode ball valve through pipe line, ball valve of electrolytic cell anode is connected anode circulating tank through pipe line, anode circulating tank input end is connected anode separation tank through pipe line, anode circulating tank output end is sequentially connected electrolytic cell anode via pump, heating pipe, electrolytic cell anode water inlet valve through pipe line, anode circulating tank input end is connected water tank through pipe line.

Description

Technical Field

[0001] This invention relates to an electrolysis water testing device, and more particularly to an electrolysis water carbon reduction testing device. Background Technology

[0002] Electrolytic carbon reduction testing equipment is the core hardware carrier supporting the research and development of coupled technologies for hydrogen production and electrochemical carbon reduction in water electrolysis. However, existing technologies suffer from problems such as low precision in carbon dioxide gas flow control and low humidification efficiency, affecting reaction mass transfer; poor precision in electrolyte concentration control leads to test fluctuations, affecting test results; and unreasonable fluid path design prevents effective product separation and accurate measurement of product yield. The main issues involve: CO2 gas typically requires humidification before entering the reactor to maintain suitable humidity on the cathode catalyst surface. Existing technologies mostly use water humidification, which is the most classic and common method. The core is to pass dry CO2 gas through a container filled with water (bubbler), allowing the gas to carry a certain amount of water vapor. Due to its simplicity and ease of implementation, it is widely used in laboratories and industry. However, this method has a serious drawback: it accelerates the precipitation and blockage of bicarbonate crystals, causing the system to fail within approximately 80 to 500 hours, which is the main bottleneck limiting the long-term stable operation of the system. Another point is that the gas flow rate needs to be controlled before CO2 gas enters the reactor, mainly through monitoring by a gas flow controller. However, the gas flow control accuracy is generally below 1%, which cannot meet the requirements of the existing reaction microenvironment. Summary of the Invention

[0003] The purpose of this invention is to provide an electrolytic carbon reduction testing device for water, which mainly addresses the technical problems of improving the efficiency of mass transfer in the cathode reaction and the efficiency of cathode product separation, as well as solving the problem of large fluctuations in electrolyte concentration.

[0004] The technical solution of this invention is as follows: an electrolytic water carbon reduction testing device, comprising an electrolytic cell, the electrolytic cell including an electrolytic cell cathode and an electrolytic cell anode, a carbon dioxide tank and a nitrogen tank being connected sequentially to the input end of the electrolytic cell cathode via pipelines through a humidification tank, a ball valve at the outlet of the electrolytic cell cathode being connected to a cathode circulation tank via pipelines, an input end of the cathode circulation tank being connected to a cathode separation tank via pipelines, an input end of the cathode circulation tank being connected to a water tank via pipelines, and an output end of the cathode circulation tank being connected sequentially to the electrolytic cell cathode via pipelines through a filter, a pump, a pressure transmitter, a cathode circulating liquid flow meter, a heating tube, a temperature sensor, and a ball valve at the inlet of the electrolytic cell cathode. The anode of the electrolytic cell is connected to the anode circulation tank via a pipeline through the ball valve at the anode outlet. The input end of the anode circulation tank is connected to the anode separation tank via a pipeline. The output end of the anode circulation tank is connected to the anode of the electrolytic cell via a pipeline through a filter, pump, pressure transmitter, anode circulating liquid flow meter, heating tube, temperature sensor, and electrolytic cell anode inlet valve. The input end of the anode circulation tank is connected to a water tank via a pipeline. The cathode of the electrolytic cell is discharged sequentially via a pipeline through the cathode outlet ball valve, cathode circulation tank, and cathode separation tank. The anode of the electrolytic cell is discharged via a pipeline through the anode outlet ball valve, anode circulation tank, and anode separation tank.

[0005] Heaters are provided on both sides of the electrolytic cell.

[0006] Both the cathode circulation tank and the anode circulation tank are equipped with temperature sensors and liquid level sensors.

[0007] The cathode separator is equipped with a cathode separator cooling coil and uses a cold water bath to fully cool and separate the products; the cathode separator is also equipped with a temperature sensor and a liquid level sensor; the liquid product is collected at the bottom outlet of the cathode separator via a solenoid valve.

[0008] The anode separation tank is equipped with a cooling coil and uses a cold water bath to fully cool and separate the products. The anode separation tank is also equipped with a liquid level sensor. The liquid product is collected at the bottom outlet of the anode separation tank via a solenoid valve.

[0009] The carbon dioxide tank, nitrogen tank, and humidifier are connected in sequence via pipelines to a solenoid valve, check valve, filter, gas pressure reducing valve, pressure gauge, and gas flow controller.

[0010] The humidifier tank is equipped with a heating rod, a temperature sensor, and a liquid level sensor.

[0011] The cathode circulation tank, anode circulation tank, humidification tank, and water tank all drain water through ball valves at their bottom outlets.

[0012] The water tank is equipped with an ultrapure water inlet. The alkaline solution input pipeline is divided into two lines, which are respectively input to the cathode circulation tank and the anode circulation tank. The pure water input pipeline of the water tank is divided into multiple lines, which are respectively input to the cathode circulation tank, the anode circulation tank, the anode separation tank (AB end), the cathode separation tank (CD end), and the humidification tank inlet (C).

[0013] The beneficial effects of this invention are as follows: Through research and experiments, it has been found that using a high-precision flow controller (the accuracy of the pressure difference flow controller can reach 0.5%) can accurately control the flow rate of carbon dioxide gas at the cathode. The carbon dioxide gas humidification adopts bubbling humidification and heat tracing and insulation of the gas pipeline after humidification to ensure humidification efficiency. The concentration of alkali can be adjusted by continuously replenishing concentrated alkali solution or pure water through real-time monitoring of the electrolyte concentration. The cathode separation tank is equipped with a cooling coil and the separation tank is subjected to a cold water bath to fully cool and separate the products. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the device structure of the present invention.

[0015] In the diagram: 1-Cathode of electrolytic cell, 2-Anode of electrolytic cell, 3-Cathode circulation tank, 4-Anode circulation tank, 5-Humidification tank, 6-Carbon dioxide tank, 7-Nitrogen tank, 8-Cathode separation tank, 9-Anode separation tank, 10-Water tank, 11-Heater, 12-Cathode separation tank cooling coil, 13-Anode separation tank cooling coil. Detailed Implementation

[0016] Reference Figure 1An electrolytic water carbon reduction testing device includes an electrolytic cell, which comprises an electrolytic cell cathode 1 and an electrolytic cell anode 2. A carbon dioxide tank 6 and a nitrogen tank 7 are connected sequentially to the input end of the electrolytic cell cathode 1 via a pipeline through a humidification tank 5. The electrolytic cell cathode outlet ball valve BV402 of the electrolytic cell cathode 1 is connected to the cathode circulation tank 3 via a pipeline. A temperature sensor TT401, a pressure transmitter PT401, and a filter TF401 are sequentially installed on the pipeline. The input end of the cathode circulation tank 3 is connected to the cathode separation tank 8 via a pipeline, and the input end of the cathode circulation tank 3 is connected to a water tank 10 via a pipeline. The output end of the cathode circulation tank 3 is connected to the electrolytic cell cathode via a pipeline through a filter TF202, a pump PM202, a pressure transmitter PT202, a cathode circulating liquid flow meter ROT202, a heating tube HTR212, a temperature sensor TT211, and the electrolytic cell cathode inlet ball valve BV401. 1. The anode outlet valve BV212 of the electrolytic cell anode 2 is connected to the anode circulation tank 4 via a pipeline, and a filter TF301 is installed on the pipeline. The input end of the anode circulation tank 4 is connected to the anode separation tank 9 via a pipeline. The output end of the anode circulation tank 4 is connected to the anode 2 of the electrolytic cell via a pipeline through filter TF201, pump PM201, pressure transmitter PT201, anode circulation liquid flow meter ROT201, heating tube HTR211, temperature sensor TT211, and electrolytic cell anode inlet valve BV211. The input end of the anode circulation tank 4 is connected to the water tank 10 via a pipeline. The cathode 1 of the electrolytic cell is discharged in sequence through a pipeline through the cathode outlet ball valve BV402, cathode circulation tank 3, and cathode separation tank 8. The anode 2 of the electrolytic cell is discharged through a pipeline through the anode outlet ball valve BV212, anode circulation tank 4, and anode separation tank 9.

[0017] The electrolytic cell is equipped with a DC power supply DC501, and heaters 11 are installed on both sides of the electrolytic cell. The anode 2 of the electrolytic cell is equipped with a temperature sensor TT501. The cathode 1 of the electrolytic cell discharges carbon dioxide through a check valve NR704.

[0018] The cathode circulation tank 3 is equipped with a temperature sensor TT202, a low liquid level sensor LT204, a medium liquid level sensor LT205, and a high liquid level sensor LT206. The anode circulation tank 4 is equipped with a temperature sensor TT201, a low liquid level sensor LT201, a medium liquid level sensor LT202, and a high liquid level sensor LT203.

[0019] The cathode separator 8 is equipped with a cathode separator cooling coil 12 and the separator is cooled and separated by a cold water bath. The cathode separator outlet is also equipped with a temperature sensor TT402, and the cathode separator is equipped with a low liquid level sensor LT401 and a high liquid level sensor LT402. The liquid product is collected at the bottom outlet of the cathode separator through a solenoid valve SV401.

[0020] The anode separation tank 9 is equipped with an anode separation tank cooling coil 13, and the separation tank is cooled and separated by a cold water bath. The anode separation tank 9 is also equipped with a low liquid level sensor LT301 and a high liquid level sensor LT302. The liquid product is collected at the bottom outlet of the anode separation tank 9 by a solenoid valve SV301.

[0021] The carbon dioxide tank 6 and the humidification tank 5 are connected in sequence via pipelines to a solenoid valve SV701, a check valve NR701, a filter TF701, a gas pressure reducing valve PRV701, a pressure gauge PI701, and a gas flow controller FM701. The nitrogen tank 7 and the humidification tank 5 are connected in sequence via pipelines to a solenoid valve SV702, a check valve NR702, a filter TF701, a gas pressure reducing valve PRV701, a pressure gauge PI701, and a gas flow controller FM701.

[0022] The humidification tank 5 is equipped with a heating rod HTR701, a temperature sensor TT701, a low liquid level sensor LT701, a medium liquid level sensor LT702, and a high liquid level sensor LT703.

[0023] The bottom outlets of the cathode circulation tank 3, anode circulation tank 4, humidification tank 5 and water tank 10 drain water through ball valves BV202, BV201, BV701 and BV102 respectively.

[0024] Water tank 10 is equipped with a low level sensor LT101, a medium level sensor LT102, and a high level sensor LT103; water tank 10 is also equipped with a temperature sensor TT101. Water tank 10 has an ultrapure water inlet pipeline, on which a pump PM101 is installed. The alkali solution inlet pipeline sequentially passes through a three-way manual ball valve BV104, a filter TF102, a pump PM103, a solenoid valve SV103, and a check valve NR102 before entering the cathode circulation tank 3; the alkali solution inlet pipeline sequentially passes through a three-way ball valve B... V104, filter TF102, pump PM103, solenoid valve SV102, and check valve NR101 enter the anode circulation tank 4. The pure water input pipeline of water tank 10 is divided into multiple branches via ball valve BV101, filter TF101, pump PM102, and pressure transmitter PT101. These branches are connected to the anode separation tank AB end via ball valve BV103, to the cathode separation tank CD end via ball valve BV105, and to the humidification tank inlet C via needle valve NV101 and solenoid valve SV102. The pure water input pipeline of water tank 10 enters the cathode circulation tank 3 and anode circulation tank 4 via the alkaline solution input pipeline through the three-way manual ball valve BV104.

[0025] All related components were commercially available. The pressure transmitter was a Gems brand, model: 3500-B-0010-G-02-B-000; the ball valve was a Haogu brand, model: VSR-1ES-200-10-6M-6M-CO2; the solenoid valve was an ASCO brand, model: 8262H007E; the gas flow controller was an Yidu brand, model: PIPG-SCF202-01-0500; and the level sensor was a Pepperl+Fuchs brand, model: CBN5-F46-E0.

[0026] Testing process: 1. A 1 mol / L KOH solution is introduced into both the anode circulation tank 4 and the cathode circulation tank 3; 2. The flow rate of the anode circulating liquid meter ROT201 and the cathode circulating liquid meter ROT202 is controlled at 100 mL / min; 3. The anode inlet electrolyte temperature sensor TT211 and the cathode inlet electrolyte temperature sensor TT212 are controlled at 60℃; 4. Set the target flow rate of the gas flow controller FM701 to 200 mL / min; 5. Set the target temperature sensor TT701 for CO2 intake at the outlet of the humidifier tank to 85℃, and start the heating rod HTR701 inside the humidifier tank 5; 6. The DC power supply DC501 is set to a constant current of 100A for electrolysis operation.

[0027] Test results: 1. The feedback flow rate of the gas flow controller FM701 is stable at 199.5-200.5 mL / min; 2. The CO2 gas temperature sensor TT701 at the outlet of the humidifier tank is stable at 84.8-85.2℃; 3. The temperature of the gas discharge port temperature sensor TT402 of the cathode gas-liquid separator 8 drops to below 30℃.

Claims

1. A water electrolysis carbon reduction testing device, comprising an electrolytic cell, the electrolytic cell including an electrolytic cell cathode and an electrolytic cell anode, characterized in that, The carbon dioxide and nitrogen tanks are connected sequentially to the cathode input of the electrolytic cell via pipelines through a humidification tank. The cathode outlet ball valve is connected to the cathode circulation tank via pipelines. The cathode circulation tank input is connected to the cathode separation tank via pipelines. The cathode circulation tank input is connected to a water tank via pipelines. The cathode circulation tank output is connected to the cathode via pipelines through a filter, pump, pressure transmitter, cathode circulating liquid flow meter, heating element, temperature sensor, and the cathode inlet ball valve. The anode outlet ball valve is connected to the anode circulation tank via pipelines. The anode circulation tank is connected to the anode separation tank via a pipeline at its input end. The output end of the anode circulation tank is connected to the anode of the electrolytic cell via a pipeline through a filter, pump, pressure transmitter, anode circulating liquid flow meter, heating tube, temperature sensor, and anode inlet valve of the electrolytic cell. The input end of the anode circulation tank is connected to a water tank via a pipeline. The cathode of the electrolytic cell is discharged sequentially via a pipeline through the cathode outlet ball valve of the electrolytic cell, the cathode circulation tank, and the cathode separation tank. The anode of the electrolytic cell is discharged via a pipeline through the anode outlet ball valve of the electrolytic cell, the anode circulation tank, and the anode separation tank.

2. The water electrolysis carbon reduction testing device according to claim 1, characterized in that, Heaters are provided on both sides of the electrolytic cell.

3. The water electrolysis carbon reduction testing device according to claim 1, characterized in that, Both the cathode circulation tank and the anode circulation tank are equipped with temperature sensors and liquid level sensors.

4. The water electrolysis carbon reduction testing device according to claim 1, characterized in that, The cathode separator is equipped with a cathode separator cooling coil and uses a cold water bath to fully cool and separate the products; the cathode separator is also equipped with a temperature sensor and a liquid level sensor; the liquid product is collected at the bottom outlet of the cathode separator via a solenoid valve.

5. The water electrolysis carbon reduction testing device according to claim 1, characterized in that, The anode separation tank is equipped with a cooling coil and uses a cold water bath to fully cool and separate the products. The anode separation tank is also equipped with a liquid level sensor. The liquid product is collected at the bottom outlet of the anode separation tank via a solenoid valve.

6. The water electrolysis carbon reduction testing device according to claim 1, characterized in that, The carbon dioxide tank, nitrogen tank, and humidifier are connected in sequence via pipelines to a solenoid valve, check valve, filter, gas pressure reducing valve, pressure gauge, and gas flow controller.

7. The water electrolysis carbon reduction testing device according to claim 1, characterized in that, The humidifier tank is equipped with a heating rod, a temperature sensor, and a liquid level sensor.

8. The water electrolysis carbon reduction testing device according to claim 1, characterized in that, The cathode circulation tank, anode circulation tank, humidification tank, and water tank all drain water through ball valves at their bottom outlets.

9. The water electrolysis carbon reduction testing device according to claim 1, characterized in that, The water tank is equipped with an ultrapure water inlet. The alkaline solution input pipeline is divided into two lines, which are respectively input to the cathode circulation tank and the anode circulation tank. The pure water input pipeline of the water tank is divided into multiple lines, which are respectively input to the cathode circulation tank, the anode circulation tank, the anode separation tank (AB end), the cathode separation tank (CD end), and the humidification tank inlet (C).

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