Water electrolysis hydrogen production device

Abstract

The water electrolysis hydrogen production device includes a water electrolysis hydrogen production equipment body, a water conductivity meter detection module, an alkali liquid tank, a mixing tank, a workbench, a solenoid valve, an electric stirring device, and a valve, and also has a comparison circuit and a control circuit; the water electrolysis hydrogen production equipment body and the water conductivity meter detection module, the alkali liquid tank, the mixing tank, the workbench, the solenoid valve, the electric stirring device, and the valve are installed together; the comparison circuit signal output end and the control circuit signal input end are electrically connected, the water conductivity meter detection module signal output end and the comparison circuit signal input end are electrically connected, and the control power supply output end of the control circuit and the power supply input end of the fourth solenoid valve are electrically connected. In this new application, the appropriate amount of alkali liquid can be automatically added to different water volumes, which prevents the waste of alkali liquid or low hydrogen production efficiency caused by adding too much or too little alkali liquid to the water; because the alkali liquid and water can be stirred and mixed in a non-artificial way, it brings convenience to the staff and correspondingly improves the hydrogen preparation efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen production equipment, in particular to a water electrolysis hydrogen production device. Background Art

[0002] Hydrogen production by water electrolysis is a relatively convenient method for producing hydrogen. Specifically, direct current is passed into an electrolytic cell filled with water, and water molecules undergo an electrochemical reaction on the electrodes, decomposing into hydrogen and oxygen (oxygen is output at the upper end of the electrode anode, and hydrogen is output at the upper end of the motor cathode). Since the conductivity of water is relatively low, in order to improve the efficiency of hydrogen production, the existing technology will add alkaline liquid to the water where hydrogen needs to be produced.

[0003] In the current technology, especially in hydrogen production sites with small scale and limited investment costs (compared to manufacturers that need to use relatively small amounts of hydrogen as production materials), for the addition of alkali solution in water for hydrogen production, the staff generally manually puts an appropriate amount of alkali solution into the water in advance, then stirs and mixes the water and alkali solution with a stirring device, and then puts the water mixed with an appropriate amount of alkali solution into the hydrogen production equipment for hydrogen production. Although the above method satisfies the production of hydrogen to a certain extent, it is limited by structure and function, and still has the following technical shortcomings that need to be improved. First, the amount of alkali solution added to the water by the staff depends entirely on experience. When the amount of alkali solution added is relatively small, it will have an adverse effect on the efficiency of hydrogen production, and when the amount of alkali solution added is too much, it will cause waste of alkali solution. Second, because the alkali solution and water are stirred and mixed manually, and the mixed alkali solution and water need to be put into the hydrogen production equipment through the liquid inlet pipe, it will bring inconvenience to the staff, and will also have an adverse effect on the efficiency of hydrogen production. In summary, it is particularly necessary to provide a water electrolysis hydrogen production device that can automatically mix and stir alkali solution and water according to the amount, and can conveniently operate one-button operation to put the mixed alkali solution into the hydrogen production equipment. Utility Model Content

[0004] In order to overcome the drawbacks of the existing water electrolysis hydrogen production equipment due to structural limitations as described in the background, the utility model provides a water electrolysis hydrogen production equipment body, which can automatically add an appropriate amount of alkali solution into different water volumes during application, thereby preventing the waste of alkali solution or low hydrogen production efficiency caused by adding too much or too little alkali solution to the water, and can stir and mix the alkali solution and water in a non-artificial way, which brings convenience to the staff and correspondingly improves the hydrogen preparation efficiency of the water electrolysis hydrogen production device.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A water electrolysis hydrogen production device, comprising a water electrolysis hydrogen production device body, a water conductivity meter detection module, an alkali liquid tank, a mixing tank, a workbench, a solenoid valve, an electric stirring device, and a valve, characterized in that it also has a comparison circuit and a control circuit; there are multiple solenoid valves, the hydrogen pipes and oxygen pipes on both sides of the upper end of the water electrolysis hydrogen production device body are respectively connected to one end of the first and second solenoid valves, one end of the liquid inlet pipe of the water electrolysis hydrogen production device body is connected to one end of the third solenoid valve, the other end of the third solenoid valve is equipped with a connecting pipe, the lower end of the water electrolysis hydrogen production device body is installed on the upper end of the workbench, the side end of the liquid inlet pipe is installed with a support rod, the outer lower end of the mixing tank is installed on the upper part of the support rod, and the probe of the water conductivity meter detection module is installed in the mixing tank; the upper end of the connecting pipe is installed in the mixing The electric stirring device is installed at one end of the outer side of the mixing tank and its stirring rod is located in the mixing tank; a water adding pipe and a one-way air valve are installed on one side of the upper end of the mixing tank, and the other side of the upper end of the mixing tank is installed together with the lower end of the valve, the upper end of the valve is connected to one end of the fourth solenoid valve, the upper end of the fourth solenoid valve is connected to the liquid outlet pipe of the alkali liquid tank, the lower end of the alkali liquid tank is installed on the other side of the upper end of the mixing tank, and the upper end of the alkali liquid tank is provided with a liquid adding pipe; the comparison circuit and the control circuit are installed in the component box, the signal output end of the comparison circuit is electrically connected to the signal input end of the control circuit, the signal output end of the water conductivity meter detection module is electrically connected to the signal input end of the comparison circuit, and the control power output end of the control circuit is electrically connected to the power input end of the fourth solenoid valve.

[0007] Furthermore, the solenoid valve is a normally closed valve core solenoid valve.

[0008] Furthermore, alkali solution is added into the alkali solution box, water is added into the mixing tank, and the valve core of the valve is in a non-fully open state.

[0009] Furthermore, the comparison circuit includes an electrically connected adjustable resistor, a resistor, and an operational amplifier, wherein one end of the first adjustable resistor is connected to the positive power input terminal of the operational amplifier, the reverse input terminal of the operational amplifier is connected to the other end of the first adjustable resistor and one end of the first resistor, the positive input terminal of the operational amplifier is connected to one end of the second adjustable resistor and one end of the second resistor, and the other end of the second resistor is connected to the negative power input terminal of the operational amplifier.

[0010] Furthermore, the control circuit includes an electrically connected resistor and transistor, a relay, and a buzzer, one end of the resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, the positive power input terminal of the relay is connected to the control power input terminal, the emitter of the transistor is connected to the negative power input terminal of the buzzer, and the normally open contact terminal of the relay is connected to the positive power input terminal of the buzzer.

[0011] Compared with the prior art, the utility model has the following beneficial effects: (1) the utility model is based on the water electrolysis hydrogen production equipment body. In application, under the joint action of the control circuit, the comparison circuit and the water conductivity meter detection module, the utility model can automatically add an appropriate amount of alkali solution into different water volumes, thereby preventing the waste of alkali solution or low hydrogen production efficiency caused by adding too much or too little alkali solution to the water; (2) since the alkali solution and water can be stirred and mixed in a non-human way by the electric stirring equipment, it brings convenience to the staff and correspondingly improves the hydrogen production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0015] Figure 1 , 2As shown in the figure, the water electrolysis hydrogen production device includes a water electrolysis hydrogen production equipment body 10, a power module E1, a power switch, a water conductivity meter detection module E, an alkali liquid tank 1, a mixing tank 2, a workbench 3, a solenoid valve, an electric stirring device M, a manual stop valve 4, and also has a comparison circuit 5 and a control circuit 6; there are four solenoid valves, and the hydrogen pipe and the oxygen pipe on both sides of the upper end of the water electrolysis hydrogen production equipment body 10 are respectively connected to the lower ends of the first solenoid valve DCN (the other end is connected to the air inlet pipe of the hydrogen tank) and the second solenoid valve DCN (the other end is connected to the air inlet pipe of the oxygen tank) through threads, and the upper part of the liquid inlet pipe of the water electrolysis hydrogen production equipment body 10 The third solenoid valve DCN is connected to the lower end thereof by threads, a connecting pipe 7 is installed on the upper end thereof by threads, the lower ends of the supporting frames 111 on both sides of the lower end of the water electrolysis hydrogen production equipment body are respectively welded to both sides of the middle part of the upper end of the workbench 3, a supporting rod 112 is respectively vertically welded to both sides of the upper end of the liquid inlet pipe, and both sides of the outer lower end of the mixing tank 2 are respectively welded to the upper parts of the two supporting rods 112, and the probe of the water conductivity meter detection module E is installed at the lower end of the mixing tank 2 (the wire connected thereto is led outward through the opening at the right end of the mixing tank 2, and the opening is sealed with a sealant); the upper end of the connecting pipe 7 is welded to the lower end of the mixing tank 2. The electric stirring device M is installed at the right outer end of the mixing tank 2 by bolts, and its stirring rod 8 is located horizontally in the mixing tank 2 (the left end of the stirring rod is tightly sleeved in the inner ring of the bearing in the middle of the left end of the mixing tank, the opening between the motor of the electric stirring device and the right side of the mixing tank is sealed, and the right side of the stirring rod enters the mixing tank through the opening); three vertical pipes that are interconnected with the mixing tank are welded in the middle of the upper end of the mixing tank 2, one of the vertical pipes at the right end is used as a water filling pipe and is threadedly installed with a sealing cover, and a one-way air valve 11 (discharging air into the mixing tank) is threadedly installed on the other vertical pipe at the right end The air in the tank), the upper end of a vertical pipe at the left end is connected to the lower end of a manual stop valve 4 via a threaded connection, the upper end of the stop valve 4 is connected to the lower end of the fourth solenoid valve DC1 via a pipe joint, the upper end of the fourth solenoid valve DC1 is connected to the liquid outlet pipe in the middle of the lower end of the alkali liquid tank 1 via a threaded connection, the lower parts of the two connecting rods at the lower outer end of the alkali liquid tank 1 are respectively welded to the outside of the upper left end of the mixing tank 2, a liquid adding pipe 101 communicating with the interior of the alkali liquid tank 1 is welded to the middle of the upper end, and a sealing cover is installed on the upper end of the liquid adding pipe via a threaded connection; the power module E1, the power switch, the comparison circuit 5 and the control circuit 6 are installed in the component box 9 at the front right end of the workbench.

[0016] Figure 1 , 2As shown in , the solenoid valve is a normally closed valve core solenoid valve. The alkali liquid tank 1 opens the sealing cover and adds alkali liquid, the mixing tank 2 opens the sealing cover and adds water, and the valve core of the stop valve 4 is in a state of opening to a certain extent. The comparison circuit includes a power switch AS, adjustable resistors R1 and R3, resistors R2 and R4, and an operational amplifier E2 connected by circuit board wiring. One end of the first adjustable resistor R1 is connected to the positive power input terminal 7 pin of the operational amplifier E2 and one end of the power switch AS. The reverse input terminal 2 pin of the operational amplifier E2 is connected to the other end of the first adjustable resistor R1 and one end of the first resistor R2. The positive input terminal 3 pin of the operational amplifier E2 is connected to one end of the second adjustable resistor R3 and one end of the second resistor R4. The other end of the second resistor R4 is connected to the negative power input terminal 4 pin of the operational amplifier E2. The control circuit includes a resistor R5 and a transistor Q1, a relay K1, and a buzzer B connected via circuit board wiring, one end of the resistor R5 is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the negative power input end of the relay K1, the positive power input end of the relay K1 is connected to the control power input end, the emitter of the transistor Q1 is connected to the negative power input end of the buzzer B, and the normally open contact end of the relay K1 is connected to the positive power input end of the buzzer B.

[0017] Figure 1 , 2 As shown in the figure, the power input terminals 1 and 2 of the power module E1 and the two poles of the AC 220V power supply are connected through wires, the power output terminals 3 and 4 of the power module E1 and the four power switches and (after the power switch AS is connected in series) the power input terminals 1 and 2 of the water conductivity meter detection module E, the power input terminal operational amplifier E2 of the comparison circuit, the positive power input terminal of the control circuit relay K1 and the emitter of the transistor Q1 are connected through wires. The signal output terminal operational amplifier E2 of the comparison circuit and the other end of the signal input terminal resistor R5 of the control circuit are connected through wires, the signal output terminal 3 of the water conductivity meter detection module E and the other end of the signal input terminal adjustable resistor R3 of the comparison circuit are connected through wires, the power output terminals of the three power switches SN and the negative power output terminal of the power module and the power input terminals of three electromagnetic valves DCN are connected through wires, and the normally closed contact terminal of the control power output terminal relay K1 of the control circuit and the 4th foot of the power module E1 and the two ends of the power input of the fourth electromagnetic valve DC1 are connected through wires. The power output terminal of the power switch S2 and the negative power output terminal of the power module are connected to the power input terminals of the electric stirring device M through wires. The handles of all power switches are located outside the front opening of the component box.

[0018] Figure 1 , 2As shown, the new type of hydrogen production equipment based on water electrolysis, after the water of the mixed alkali solution in the electrolytic cell 113 of the water electrolysis hydrogen production equipment body is fed with direct current, the water molecules undergo electrochemical reactions on the two electrodes matching the water electrolysis hydrogen production equipment body, and decompose into hydrogen and oxygen (the upper end of the electrode anode outputs oxygen, and the upper end of the motor cathode outputs hydrogen); the above is an existing mature technology, and this application does not elaborate on the working process and principle of the water electrolysis hydrogen production equipment body to prepare hydrogen. After the 220V AC power supply enters the power input end of the power module E1, the 3rd and 4th pins of the power module E1 output a stable DC 12V power supply to enter the power input end of the four power switches and the water conductivity meter detection module, the comparison circuit and the control circuit (based on turning on the power switch A), and the above mechanism is powered on. After the staff opens the first solenoid valve DCN connected to the hydrogen pipe and the oxygen pipe on both sides of the upper end of the water electrolysis hydrogen production equipment body 10 and the power switch SN corresponding to the second solenoid valve DCN respectively, the two solenoid valves DCN are energized and their valve cores are opened, so that the hydrogen and oxygen prepared by the water electrolysis hydrogen production equipment body 1 enter the hydrogen and oxygen tanks respectively. In the present invention, after a corresponding amount of water is added to the mixing tank 2, the staff turns on the corresponding power switch S2 of the electric stirring device M, and the stirring rod 8 of the electric stirring device M stirs and mixes the water in the mixing tank and the alkali solution that enters later; when it is necessary to add an appropriate amount of alkali solution to the alkali solution tank 1, the staff turns on the power switch AS, and the comparison circuit, the control circuit, and the water conductivity meter detection module are powered on and work, so that the liquid alkali solution in the alkali solution tank will enter the mixing tank 2 (with a small flow rate) through the electromagnetic valve DC1 with the valve core opened (the 12V power supply enters the power input end of the electromagnetic valve DC1 through the relay K1 control power input end and the normally closed contact end, and the electromagnetic valve DC1 is powered on and the valve core is opened), and the valve 4, and the electric stirring device M stirs and mixes the alkali solution and water that enter. In actual situations, while the electric stirring device M stirs the mixed liquid, the water conductivity meter detection module E will detect the mixing ratio of water and alkali solution. When the alkali solution entering the mixing tank is relatively large, the voltage signal output by the 3rd foot of the water conductivity meter detection module E is relatively high, and vice versa. When the ratio of alkali solution to water does not reach the ratio set by the staff through the adjustable resistor R3 (the principle will be introduced later), the voltage signal output by the 3rd pin of the water conductivity meter detection module E is relatively low. The voltage signal is relatively low after being divided by the adjustable resistors R3 and R4 and entering the 3rd pin of the operational amplifier E2 (for example, lower than 3V, the voltage of the 12V power supply entering the 2nd pin of the operational amplifier E2 is 3V after being divided by the adjustable resistors R1 and R2). The 6th pin of the operational amplifier E2 outputs a low level, the relay K1 will not be energized and closed, the buzzer B will not sound, the solenoid valve DC1 will continue to open, and the alkali solution will continue to enter the mixing tank.When the ratio of alkali solution to water reaches the ratio set by the staff through the adjustable resistor R3, the voltage signal output by the 3rd pin of the water conductivity meter detection module E is relatively high. The voltage signal is relatively high (higher than 3V, higher than the voltage of the 2nd pin of the operational amplifier E2) after the voltage is divided by the adjustable resistors R3 and R4. The 6th pin of the operational amplifier E2 outputs a high level, which is amplified by the transistor Q1 and enters the negative power input terminal of the relay K1. The relay K1 is energized to close its control power input terminal and the normally open contact terminal, and the control power input terminal and the normally closed contact terminal are open. In this way, after the relay K1 is energized to close its control power input terminal and the normally open contact terminal, the buzzer B will be energized to work and sound to remind the staff that the alkali solution in the mixing tank meets the requirements and can enter the hydrogen preparation process. Relay K1 is After the control power input terminal and the normally closed contact terminal are electrically closed and open, the solenoid valve DC1 will lose power and no longer work, and the valve core will be closed. In this way, the liquid in the alkali liquid tank will no longer enter the mixing tank. Subsequently, the staff can turn off the power switch AS and turn on the power switch of the third solenoid valve DCN. The valve core of the third solenoid valve DCN will be powered on and open, and the liquid in the mixing tank will enter the electrolytic hydrogen production equipment body through the liquid inlet pipe. After the liquid entering is appropriate, the power switch of the third solenoid valve DCN is turned off, and the hydrogen preparation process can be entered. Through the above, the new type can automatically add an appropriate amount of alkali liquid to different water volumes, preventing the waste of alkali liquid or low hydrogen production efficiency caused by adding too much or too little alkali liquid to the water; because the alkali liquid and water can be stirred and mixed in a non-artificial way, it brings convenience to the staff and correspondingly improves the hydrogen preparation efficiency.

[0019] Figure 1 , 2As shown, transistor Q1 is a NPN transistor of model 9013; the resistance values ​​of resistors R2, R4 and R5 are 3K, 2.9K and 10K respectively; the model of relay K1 is DC12V; the power module E1 is a finished product of a switching power module of 220V AC to 12V DC; the model of operational amplifier E2 is UA741; the buzzer B is a finished product of an active continuous sound buzzer alarm of model FM12V; the electric stirring device M is a finished product of a coaxial motor gear reducer of 12V DC and 100W power; the resistance value of the adjustable resistor R1 is 47K (adjusted to 9K in this embodiment); the resistance value of the adjustable resistor R3 is 47K (adjusted to 5.1K in this embodiment; specifically, the handle of the adjustable resistor R3 is located outside a corresponding opening at the front end of the component box, and a continuous number representing the alkali liquid amount data is marked on the side end of the handle. The staff adjusts the resistance value of the adjustable resistor R3 to a relatively large value. When the partial pressure is large, the amount of alkali liquid entering the mixing tank 2 is relatively large, and the voltage signal of the subsequent 3-pin input of the operational amplifier E2 is relatively high, the solenoid valve DC1 will lose power, that is, the threshold value of the new alkali liquid volume is set relatively large, and the staff adjusts the resistance value of the adjustable resistor R3 to obtain a relatively small partial pressure. In this way, the amount of alkali liquid entering the mixing tank 2 is relatively small, and the voltage signal of the subsequent 2-pin input of the operational amplifier E2 is relatively low, the solenoid valve DC1 will lose power, that is, the threshold value of the new alkali liquid volume is set relatively small, and the specific alkali liquid threshold is set by the staff according to needs); the water conductivity meter detection module E is a finished water quality conductivity sensor of model JXBS-3001-SZ-EC, which has two power input terminals and a signal output terminal. The signal output terminal will output a voltage signal varying between 0-10V as the detected water conductivity is different.

[0020] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the utility model.

[0021] In addition, it should be understood that although the present specification is described according to the implementation mode, the implementation mode does not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A water electrolysis hydrogen production device, comprising a water electrolysis hydrogen production equipment body, a water conductivity meter detection module, an alkali liquid tank, a mixing tank, a workbench, a solenoid valve, an electric stirring device, and a valve, characterized in that: It also has a comparison circuit and a control circuit; there are multiple solenoid valves, the hydrogen pipes and oxygen pipes on both sides of the upper end of the water electrolysis hydrogen production equipment body are respectively connected to one end of the first and second solenoid valves, one end of the liquid inlet pipe of the water electrolysis hydrogen production equipment body is connected to one end of the third solenoid valve, and the other end of the third solenoid valve is installed with a connecting pipe, the lower end of the water electrolysis hydrogen production equipment body is installed on the upper end of the workbench, the side end of the liquid inlet pipe is installed with a support rod, the outer lower end of the mixing tank is installed on the upper part of the support rod, and the probe of the water conductivity meter detection module is installed in the mixing tank; the upper end of the connecting pipe is installed at the lower end of the mixing tank; the electric stirring device is installed at one end of the outer side of the mixing tank and its stirring rod is located In the mixing tank; a water adding pipe and a one-way air valve are installed on one side of the upper end of the mixing tank, the other side of the upper end of the mixing tank is installed together with the lower end of the valve, the upper end of the valve is connected to one end of the fourth solenoid valve, the upper end of the fourth solenoid valve is connected to the liquid outlet pipe of the alkali liquid tank, the lower end of the alkali liquid tank is installed on the other side of the upper end of the mixing tank, and the upper end of the alkali liquid tank is provided with a liquid adding pipe; the comparison circuit and the control circuit are installed in the component box, the signal output end of the comparison circuit is electrically connected to the signal input end of the control circuit, the signal output end of the water conductivity meter detection module is electrically connected to the signal input end of the comparison circuit, and the control power output end of the control circuit is electrically connected to the power input end of the fourth solenoid valve.

2. The water electrolysis hydrogen production device according to claim 1, characterized in that: The solenoid valve is a normally closed spool solenoid valve.

3. The water electrolysis hydrogen production device according to claim 1, characterized in that: Alkali liquid is added into the alkali liquid box, water is added into the mixing tank, and the valve core of the valve is not in a fully open state.

4. The water electrolysis hydrogen production device according to claim 1, characterized in that: The comparison circuit includes an electrically connected adjustable resistor, a resistor, and an operational amplifier, wherein one end of the first adjustable resistor is connected to the positive power input terminal of the operational amplifier, the reverse input terminal of the operational amplifier is connected to the other end of the first adjustable resistor and one end of the first resistor, the positive input terminal of the operational amplifier is connected to one end of the second adjustable resistor and one end of the second resistor, and the other end of the second resistor is connected to the negative power input terminal of the operational amplifier.

5. The water electrolysis hydrogen production device according to claim 1, characterized in that: The control circuit includes an electrically connected resistor and a transistor, a relay, and a buzzer, one end of the resistor is connected to the base of the transistor, the collector of the transistor is connected to the negative power input terminal of the relay, the positive power input terminal of the relay is connected to the control power input terminal, the emitter of the transistor is connected to the negative power input terminal of the buzzer, and the normally open contact terminal of the relay is connected to the positive power input terminal of the buzzer.

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