CN104611719A - Pure oxygen gas source generator for ozone synthesis - Google Patents

Abstract

A pure oxygen source generator for synthesizing ozone, using an electrochemical method to provide a pure oxygen supply unit for the ozone generator, including at least two electrolyzed water units and a corresponding power supply unit for each electrolyzed water unit; the power supply unit includes at least A power supply unit for hydrogen energy recovery and an external power supply unit; each power supply unit is only independently connected to its corresponding electrolyzed water unit circuit; the hydrogen generated by all electrolyzed water units is sent to the hydrogen fuel cell as fuel; the electrolyzed water unit generates Oxygen is transported to the raw material inlet of the ozone generator to generate ozone; the negative electrode and positive electrode side of the hydrogen fuel cell of the hydrogen energy recovery power supply unit input hydrogen and air respectively, and the input hydrogen is connected to the cathode hydrogen chamber of the electrolyzed water unit through a pipeline , the exhaust gas on the positive side is emptied after gas-liquid separation. The invention can be used as an ozone generator to prepare high-purity oxygen from air at low cost, stably and continuously in indoor, outdoor and outdoor places.

Description

A pure oxygen source generator for synthesizing ozone

technical field

The invention relates to a pure oxygen source generator, in particular to a pure oxygen source generator for synthesizing ozone.

Background technique

Ozone is a strong oxidizing, unstable gas that is easy to decompose and cannot be stored. Therefore, it needs to be prepared on-site in actual use, that is, it can be used as it is prepared. The synthesis of ozone generally uses oxygen-containing gas (such as pure oxygen and air) as the gas source, and the oxygen molecules are dissociated into oxygen atoms through plasma (generated by dielectric barrier discharge or corona discharge) or ultraviolet light, and then the oxygen atoms are combined with Oxygen molecules generate ozone through a three-body collision reaction. The commercial methods for the synthesis of ozone, mainly the plasma method, are the most widely used. Since the raw material for ozone synthesis is oxygen, the oxygen content in the gas source has a significant impact on the power consumption and concentration of ozone. The ozone power consumption when air is used as the gas source is at least twice that of pure oxygen as the gas source. When air is used as the gas source, the ozone concentration can only reach 3-6wt%, which is much lower than when pure oxygen is used as the gas source (up to 15wt%). In addition, when the plasma method is used to synthesize ozone, if air or oxygen-enriched air is used as the gas source, harmful and corrosive gases such as nitrogen oxides (NO _x ) will inevitably be produced; if pure oxygen is used as the gas source, only ozone will be contained in the gas. And oxygen, pure ingredients, no toxic side effects.

At present, the pure oxygen source generator for synthesizing ozone mainly adopts molecular sieve pressure swing adsorption (PSA) technology. This kind of pure oxygen source generator requires pretreatment to remove moisture and carbon dioxide in the raw material air. There are many adsorption beds, the process flow is complicated, the volume is large, and the reliability is poor. Moreover, the purity of the obtained oxygen is not high, and the highest oxygen concentration can only be Reach 95%. In the water electrolysis process represented by solid electrolyte water electrolysis technology, the anode and cathode of the electrolytic cell can obtain pure oxygen and pure hydrogen at the same time respectively, and the purity can be as high as 99.99%. The solid electrolyte electrolytic cell has a high working current density (1-3A/cm ² ), is safe and reliable and has a long service life (no electrolyte is required, only pure water is required), and the energy efficiency is as high as 85%. The electrolytic cell is compact in structure, small in size and light in weight . However, the power consumption of solid electrolyte electrolysis of water to prepare pure oxygen is relatively high, and each cubic meter of oxygen needs to consume 8-10 kWh of electricity. In addition, if the hydrogen gas produced by the cathode of the electrolytic cell is not utilized, not only the hydrogen energy is wasted, but also there is a safety hazard of inflammability and explosion.

To solve the above-mentioned problem of hydrogen, Chinese invention patents 02114162.2 and 201110105892.8 combine electrolysis cells with hydrogen fuel cells. The hydrogen produced by the electrolysis cell flows into the hydrogen fuel cell to generate electricity. Chinese invention patent 02114162.2 uses hydrogen fuel cell and external 220V AC rectified DC power as a dual power supply to power the electrolytic cell at the same time. In the dual power supply circuit, if the voltage of the external power supply is higher than the working voltage of the fuel cell, the fuel cell will be reverse charged and damaged. Due to factors such as the instability of the load of the electrolytic cell, it is difficult to ensure that the dual power supply circuit can operate stably, reliably and with high efficiency in actual use. In addition, since the electric energy recovered by the hydrogen fuel cell only accounts for 30-40% of the electric energy consumed by the electrolytic cell, that is, 5-7 kWh of electricity is still consumed per cubic meter of oxygen, and the operating cost of producing pure oxygen is still relatively high; moreover, This patent is only applicable to places that can provide 220V alternating current. Chinese invention patent 201110105892.8 is to solve the problem of dual power supply circuit and the limitation of the place of use. The secondary battery is used to supply power to the electrolytic cell, and the hydrogen fuel cell is used to charge the secondary battery by means of floating charge. However, due to the limitation of the capacity of the secondary power supply and the high energy consumption of electrolyzed water, the limited electric energy stored in the secondary battery will be consumed rapidly during operation, and after a period of operation, it must be recharged by an external power supply to start working again. If this patented oxygen generator is used as a pure oxygen source generator for synthesizing ozone, it can only generate pure oxygen intermittently at a small flow rate and in a short time.

Contents of the invention

In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a pure oxygen source generator for synthesizing ozone, which can be used as an ozone generator to produce high-purity oxygen from air at low cost, stably and continuously in indoor, outdoor or outdoor places. oxygen.

The technical solution of the present invention is: a pure oxygen source generator for synthesizing ozone, using electrochemical methods to separate air to prepare pure oxygen, especially combining fuel cell and electrolyzed water technology to prepare pure oxygen to provide pure oxygen for the ozone generator supply unit.

The pure oxygen supply unit includes at least two electrolyzed water units and a corresponding power supply unit for each electrolyzed water unit;

The power supply unit includes at least one power supply unit for hydrogen energy recovery and an external power supply unit. The hydrogen energy recovery power supply unit uses a hydrogen fuel cell, and the external power supply unit selects at least one of solar cells, direct methanol fuel cells, and external AC grid power supplies;

The electrolyzed water unit is a water electrolyzer;

Each power supply unit is only independently connected to its corresponding electrolyzed water unit circuit;

The hydrogen generated by all electrolyzed water units is gathered through the hydrogen pipeline and sent to the hydrogen fuel cell together as fuel; the oxygen produced by each electrolyzed water unit is gathered through the oxygen pipeline and flows into the dryer, and after drying, it is sent to the raw material oxygen inlet of the ozone generator to generate ozone;

The negative electrode and positive electrode side of the hydrogen fuel cell of the hydrogen energy recovery power supply unit input hydrogen and air respectively, and the input hydrogen is connected to the cathode hydrogen chamber of the electrolysis water unit through the pipeline, and the exhaust gas on the positive electrode side is emptied after gas-liquid separation .

In the electrolyzed water unit, its anode and cathode are separated by an electrolyte diaphragm, and are respectively connected to the positive pole and negative pole of the power supply unit. The electrolyte membrane may be an acidic and/or alkaline polymer electrolyte membrane, or an electrolyte membrane impregnated with an acid or alkali porous membrane. In an acidic system or an alkaline system, hydrated protons or hydroxide ions migrate through the electrolyte diaphragm to the cathode side to generate hydrogen gas, and the anode side generates oxygen gas under the action of the internal electric field. The electrolyte separator can be a polymer electrolyte material represented by acidic perfluorosulfonic acid resin, sulfonated polyetheretherketone or sulfonated polysulfone, or a basic quaternized polysulfone (Shanfu Lu, et al. PNAS2008 , 105, 20611; Junfeng Zhou, etal.Journal of Power Sources 2009, 190, 285) is a representative polymer electrolyte material. The catalytic active component of the cathode electrocatalyst is Pt black or Pt/C with hydrogen evolution reaction function, and the loading of the catalytic active component on the membrane electrode is 0.01-1mg/cm ² ; the catalytic active component of the anode electrocatalyst is determined by the periodic table Composition of one or more than one metals or oxides of transition metals of group VIII (Chinese patent CN101008087B), the loading of catalytically active components on the membrane electrode is 0.01-4 mg/cm ² .

In the hydrogen fuel cell power supply unit, the positive pole and the negative pole are separated by an electrolyte membrane to form two gas chambers. The air chamber on the negative electrode side is connected to the hydrogen pipeline, and flows into the hydrogen generated by the electrolyzed water unit; the air chamber on the positive electrode side is fed by a fan or an air pump to obtain the oxygen required by the hydrogen fuel cell. The exhaust gas from the positive electrode side air chamber is emptied after gas-liquid separation (see Chinese patent application: Zhu Xiaobing, Zhu Weikun, Zhu Aimin, Liu Jinglin "An electrochemical method for preparing pure oxygen and oxygen-poor gas from an oxygen-containing gas mixture"). The water produced on the positive electrode side flows into the gas-liquid separator along with the exhaust gas. After the gas-liquid separation, the water flows back to the cathode and/or anode of the electrolytic cell for recycling. If the loss of water caused by volatilization or evaporation factors is not taken into account, there is no need to add additional water. This not only reduces the weight of the device, but also greatly reduces the cost of using pure water in operation. The electrolyte membrane may be an acidic and/or alkaline polymer electrolyte membrane, or an electrolyte membrane impregnated with an acid or alkali porous membrane. The electrolyte separator can be a polymer electrolyte material represented by acidic perfluorosulfonic acid resin, sulfonated polyetheretherketone or sulfonated polysulfone, or a basic quaternized polysulfone (Shanfu Lu, et al. PNAS2008 , 105, 20611; Junfeng Zhou, etal.Journal of Power Sources 2009, 190, 285) is a representative polymer electrolyte material. The catalytic active component of the negative electrode electrocatalyst is Pt black or Pt/C with the function of hydrogen oxidation reaction, and the loading of the catalytic active component on the membrane electrode is 0.01-1 mg/cm ² ; the catalytic active component of the positive electrode electrocatalyst is composed of The composition of one or more metals or oxides of transition metals of Group VIII (Chinese patent CN101008087B), the loading of catalytically active components on the membrane electrode is 0.01-4mg/cm ² .

The circuit is connected, and the cathode and anode of the electrolytic cell are connected with the negative pole and the positive pole of the fuel cell.

The main unit is composed of a fuel cell and an electrolytic cell, and the auxiliary unit is composed of an electrolytic cell for supplementing hydrogen. There is only an air path connection between the main unit and the auxiliary unit, and there is no electric circuit connection. The cathode hydrogen gas path of the electrolytic cell is connected with the negative electrode hydrogen gas path of the fuel cell. The oxygen discharged from the anode of the electrolytic cell is dried and then input to the raw gas inlet of the ozone generator to generate ozone output.

In the direct methanol fuel cell power supply unit, methanol is used as fuel to flow into the negative electrode, oxygen-containing gas is used as the oxidant to flow into the positive electrode, and electricity is supplied to the electrolytic cell.

The solar cell power supply unit directly adopts a solar cell commercial product that matches the required voltage and power of the water electrolysis cell to generate electricity for the electrolysis cell.

The AC grid power supply unit directly adopts a DC power supply commercial product supplied by an AC grid that matches the required voltage and power of the water electrolysis cell to generate electricity for the electrolysis cell.

To prepare pure oxygen for the ozone generator in an indoor place, due to the convenient connection of the AC grid, the preferred external power supply unit is a DC power supply that uses solar cells and an external AC grid at the same time. This can not only save electric energy, reduce operating costs, but also make up for the uncontrollable shortcomings of solar energy.

To prepare pure oxygen for the ozone generator in outdoor and field places, because the AC power grid is inconvenient or difficult to connect, the preferred external power supply unit is to use solar cells and direct methanol fuel cells at the same time. This not only gives full play to the advantages of obtaining solar energy outdoors and in the field, but also makes up for the shortcomings of uncontrollable solar energy and inconvenience or difficulty in connecting to the AC grid.

The invention provides a pure oxygen source generator for synthesizing ozone, which adopts an electrochemical method to separate air to prepare pure oxygen, especially combines fuel cell and electrolysis water technology to prepare pure oxygen. Adopting at least two electrolyzed water units and their respective power supply units, the operation is stable and reliable; the hydrogen energy recovery power supply unit recycles and utilizes the hydrogen energy generated by electrolyzed water, which saves energy and solves the safety problem of hydrogen. Solar cells and AC power grids or direct methanol fuel cells are used as an external power supply unit, which not only uses solar energy to further reduce power consumption, but also can continuously and stably prepare pure oxygen for ozone generators indoors, outdoors and in the field.

The present invention prepares the advantage of the method for pure oxygen for ozone generator as follows:

1. The traditional method of electrolyzing water with solid electrolyte to prepare pure oxygen has high power consumption, 8-10 kWh per cubic meter of oxygen. In addition, if the hydrogen gas produced by the cathode of the electrolytic cell is not utilized, not only the hydrogen energy is wasted, but also there is a safety hazard of inflammability and explosion. Compared with the traditional method, this patented method can use electrolyzed water to generate oxygen, and at the same time, recycle hydrogen to generate electricity to supply the electrolytic cell to generate more oxygen, with higher energy efficiency. The electrolyzed water produces hydrogen and the fuel cell consumes hydrogen, and there is no net hydrogen generation in the system. The system is safer to use.

2. Chinese invention patent 02114162.2 uses hydrogen fuel cell and external 220V AC rectified DC power as a dual power supply to power the electrolytic cell at the same time. In the dual power supply circuit, if the voltage of the external power supply is higher than the working voltage of the fuel cell, the fuel cell will be reverse charged and damaged. Due to factors such as the instability of the load of the electrolytic cell, it is difficult to ensure that the dual power supply circuit can operate stably, reliably and with high efficiency in actual use. In addition, since the electric energy recovered by the hydrogen fuel cell only accounts for 30-40% of the electric energy consumed by the electrolytic cell, that is, 5-7 kWh of electricity is still consumed per cubic meter of oxygen, and the operating cost of producing pure oxygen is still relatively high; moreover, This patent is only applicable to places that can provide 220V alternating current. Compared with Chinese patent 02114162.2, the method of this patent adopts that each power supply unit is only independently connected to the corresponding electrolytic water unit circuit. The external power supply unit is selected from at least one of three types of batteries or power sources: solar cells, direct methanol fuel cells, and AC grids. The patented method is suitable for continuously and stably providing pure oxygen for the ozone generator in indoor, outdoor and outdoor places.

3. Chinese invention patent 201110105892.8 In order to solve the problem of dual power supply circuit and the limitation of the place of use, the secondary battery is used to supply power to the electrolytic cell, and the hydrogen fuel cell is used to charge the secondary battery by means of floating charge. However, due to the limitation of the capacity of the secondary power supply and the high energy consumption of electrolyzed water, the limited electric energy stored in the secondary battery will be consumed rapidly during operation, and after a period of operation, it must be recharged by an external power supply to start working again. This patented oxygen generator is only suitable for small flow and short-term intermittent use. In this patented method, the auxiliary unit used in conjunction with the external power supply unit and the electrolytic cell is used to generate additional hydrogen to supplement the fuel cell for its power generation, so as to compensate for the energy loss of the main unit of the combined use of the fuel cell and the electrolytic cell, rather than through the secondary battery To supplement electrical energy to make up for energy loss. Chinese invention patent 201110105892.8 is limited by the energy storage capacity of the secondary battery, and provides a limited capacity or intermittent oxygen production method. This patent is suitable for continuously and stably providing pure oxygen for the ozone generator in indoor, outdoor and field places.

Description of drawings

The connection relationship of the gas path in Figure 1 is as follows: the main unit is composed of a fuel cell FC and an electrolytic cell WE-1, and the auxiliary unit is composed of an electrolytic cell WE-2 for supplementing hydrogen and an external power supply unit, and the external power supply unit adopts solar energy At least one of a battery, a direct methanol fuel cell, and a DC power supply of an AC grid. There is only an air path connection between the main unit and the auxiliary unit, and there is no electric circuit connection. The cathode hydrogen gas path of the electrolytic cells WE-1 and WE-2 is connected with the negative electrode hydrogen gas path of the fuel cell FC. After the exhaust gas from the anode side of the electrolytic cell WE-1 and WE-2 passes through the dryer, pure oxygen gas is obtained. Pure oxygen gas is then input to the raw material inlet of the ozone generator to generate ozone. Air is input to the positive electrode side of the fuel cell FC. The positive side exhaust port of the fuel cell FC is connected to the gas-liquid separator of the water storage unit, the exhaust gas is directly emptied after gas-liquid separation, and the water returns to the main unit electrolytic cell WE-1 and the auxiliary unit electrolytic cell WE-2 Anode side, recycled. Due to the inevitable factor of water vapor evaporation, an appropriate amount of water is added to the separator of the water storage unit to maintain the water material balance of the entire system.

The connection relationship of the circuit in Fig. 1 is as follows: the negative pole and the positive pole of the fuel cell FC are respectively connected to the cathode and the anode of the electrolytic cell WE-1. The negative pole and the positive pole of the DC power supply of the external power supply unit are respectively connected with the negative pole and the positive pole of the electrolytic cell WE-2.

Figure 1. A flow chart for supplying pure oxygen to an ozone generator using an electrochemical method. In the figure, FC and WE-1 are respectively the fuel cell FC of the main unit and the electrolytic cell WE-1; WE-2 is the electrolytic cell WE-2 of the auxiliary unit; Water-gas Separator is the gas-liquid separator of the water storage unit; Solar Cell and/or DMFC and/or DC power is at least one of the three batteries or power sources of the auxiliary unit: solar cells, direct methanol fuel cells, and AC grids; 0 ₃ -Generator is an ozone generator; system input The AIR and H ₂ O are input air and water respectively, and the output Vent and O ₃ are exhaust air and ozone respectively.

Figure 1 takes air as an example. The external power supply unit of the auxiliary unit is connected to the electrolytic cell WE-2 to generate hydrogen, which is supplied to the fuel cell FC of the main unit to start the whole system and make up for the energy consumption of the main unit so that it can continue to operate normally. The external power supply unit can be at least one of three types of batteries or power sources: solar cells, direct methanol fuel cells, and AC grids. The negative electrode and positive electrode of the fuel cell FC of the main unit flow into hydrogen and air respectively, and generate electricity to supply the electrolytic cell WE-1 of the main unit, and the hydrogen generated by the electrolysis of water is recycled and supplied to the fuel cell to form hydrogen recycling.

The outflow gas from the positive electrode side of the fuel cell FC is evacuated after passing through the gas-liquid separator. The effluent gas from the anode side of the electrolytic cell WE-1 and WE-2 is input to the raw material inlet of the ozone generator 0 ₃ -Generator through the dryer to generate ozone.

The water produced on the positive side of the fuel cell FC flows into the gas-liquid separator along with the exhaust gas. After the gas-liquid separation, the water flows back to the anode side of the electrolytic cell for recycling. If the loss of water caused by volatilization or evaporation factors is not taken into account, there is no need to add additional water. Considering the loss caused by the inevitable evaporation of water vapor in the gas path, water can be properly replenished to the water storage unit.

Therefore, the input of the whole system is the air supplied to the fuel cell FC of the main unit, and the water for replenishing the loss of water vapor evaporation; the output is the ozone generated by the ozone generator 0 ₃ -Generator, and the gas flowing out from the positive side of the fuel cell FC is emptied after gas-liquid separation gas.

Detailed ways

Example 1

Take Nafion212 membrane (EW=1052g/mol _SO3H ) 40cm ² , add 20ml of N-methyl-2-pyrrolidone and 10ml of isopropanol and heat to dissolve to prepare perfluorosulfonic acid solution. Cast the perfluorosulfonic acid solution on a flat plate, heat it at 70°C for 10 hours, then raise the temperature to 77°C and heat it for 12 hours. After the solvent is basically volatilized, heat-treat it in a vacuum oven at 130°C for 1 hour to form a base film with a thickness of 18 μm. Polymer electrolyte membrane for fuel cell and 50μm solid electrolyte water electrolysis cell membrane.

Using SGL carbon paper, PTFE emulsion, XC-72 carbon powder, 5% (DuPont) solution and 20% Pt/C catalyst to prepare electrodes, in which The mass ratio of resin to C was 0.8. The negative electrode Pt loading is 0.3 mg/cm ² , and the positive electrode Pt loading is 0.5 mg/cm ² . The operating conditions of the 5cm ² MEA three-in-one hydraulic press are 160°C, micro-pressure pre-compression for 1 minute, then increase the pressure to 2MPa, hot-press for 2 minutes, and cool to obtain the MEA for fuel cells.

Using SGL carbon paper, PTFE emulsion, XC-72 carbon powder, 5% (DuPont EW=1100g/mol-SO ₃ H) solution and cathode with 20% Pt/C catalyst, anode with Pt black, IrO ₂ catalyst to prepare electrodes respectively. cathodic The mass ratio of resin to C was 0.8. The mass ratio of Pt black, IrO ₂ powder and Nafion resin (EW=1100g/mol-SO ₃ H) of the anode is 5:1. catalyst, Add isopropanol to the resin solution and disperse it ultrasonically for 12 hours to make a spare slurry for the anode catalytic layer. The Pt loading of the cathode is 0.3 mg/cm ² , and the Pt loading of the anode is 4 mg/cm ² . The operating conditions of the three-in-one hydraulic press for pressing 5cm ² MEA are: 160°C, micro-pressure pre-compression for 1 minute, then increase the pressure to 2MPa, hot-press for 2 minutes, and cool to obtain MEA for solid electrolyte water electrolysis cells.

The evaluation parameters of the fuel cell are as follows: dry state H ₂ /AIR; operating pressure normal pressure; operating temperature 30-80°C; m _{Pt, MEA} = 0.7mg/cm ² ; single-cell test; hydrogen recycling, air flow rate of 100ml /min; the effective area is 5cm ² .

The evaluation parameters of the electrolytic cell are as follows: the temperature of the water electrolytic cell is 45°C, the normal pressure, the water flow rate is 15ml/min, the single cell test, and the effective area is 5cm ² . It is powered by MPS30 DC steady current power supply.

The flow structure of the whole system is shown in Figure 1. After 2 hours of stable operation, the measured current and voltage output data are shown in Table 1. The air of the whole system is input at 100ml/min, and water is supplemented at the same time at 10ml/day; the pure oxygen input to the ozone generator is 20ml/min to generate ozone with a concentration of 14wt%.

The electrochemical experiment data of table 1. embodiment 1

The invention is a method for preparing pure oxygen by an ozone generator. At least two electrolyzed water units and their respective power supply units are adopted, and the continuous operation is stable and reliable; the hydrogen energy recovery power supply unit recycles and utilizes hydrogen energy generated by electrolyzed water, which saves energy and saves energy. Solve the safety problem of hydrogen;

The combination of solar cells and AC power grids or direct methanol fuel cells as an external power supply unit not only uses solar energy to further reduce power consumption, but also can continuously and stably produce pure oxygen for ozone generators indoors, outdoors and in the field.

Aiming at solving the problem of running energy consumption between the fuel cell and the electrolytic cell, the present invention supplements the negative electrode side of the main unit fuel cell through the hydrogen gas on the cathode side of the electrolytic cell of the auxiliary unit, and the supplementary hydrogen generates electricity through the fuel cell to make up for the fuel of the main unit Operating energy loss between the battery and the electrolytic cell. However, the Chinese invention patent 02114162.2 uses the hydrogen fuel cell and the external 220V AC rectified DC power as a dual power supply, and supplies power to the electrolytic cell at the same time to make up for the above energy consumption. There are two problems (1) if the voltage of the external power supply is higher than that of the fuel cell (2) Due to factors such as the instability of the load of the electrolytic cell, it is difficult to ensure that the dual power supply circuit can operate stably, reliably and with high efficiency in actual use. Therefore, the method of this patent to make up for the energy loss between the fuel cell and the electrolytic cell by supplementing hydrogen has two advantages (1) avoiding damage to the fuel cell due to reverse charging; (2) the fuel cell of the main unit is used as a single power supply Powers the electrolytic cell, which has circuits that operate reliably and efficiently.

Claims (9)

1. synthesize a purity oxygen source generator for ozone, it is characterized in that adopting electrochemical method, is the pure oxygen feed unit that ozonizer is supplied raw materials,

Described pure oxygen feed unit comprises at least two electrolysis water units and each self-corresponding power supply unit of each electrolysis water unit;

Power supply unit comprises at least one and reclaims power supply unit and an external power supply unit for Hydrogen Energy, Hydrogen Energy reclaims power supply unit and adopts hydrogen fuel cell, and external power supply unit selects at least one in solar cell, direct methanol fuel cell, external communication electric network source;

Described electrolysis water unit is water electrolytic cell;

Separate connection on the electrolysis water unit circuit that each power supply unit is only corresponding with it respectively;

The hydrogen that all electrolysis water units produce is converged by Hydrogen Line, is delivered to hydrogen fuel cell together as fuel; The oxygen that each electrolysis water unit produces is converged by oxygen channel and flows into moisture eliminator, and the raw material oxygen intake being delivered to ozonizer after drying together produces ozone;

Hydrogen Energy reclaims negative pole, side of the positive electrode inputting hydrogen and the air respectively of the hydrogen fuel cell of power supply unit, and its hydrogen inputted is connected with the cathode hydrogen air chamber of electrolysis water unit by pipeline, and the discharge gas of side of the positive electrode is emptying after gas-liquid separation.

2., according to electrochemical method according to claim 1, it is characterized in that:

Anode and the negative electrode of described electrolysis water unit are separated by electrolyte membrance, are connected respectively with the positive pole of power supply unit with negative pole.

3., according to electrochemical method according to claim 1, it is characterized in that:

Described hydrogen fuel cell power supply unit, its positive pole and negative pole are separated formation two air chambers by electrolyte membrance; Negative side air chamber is connected with Hydrogen Line, flows into the hydrogen that electrolysis water unit produces; Air is sent into by fan or air pump by side of the positive electrode air chamber, obtains the oxygen needed for hydrogen fuel cell; It is emptying after gas-liquid separation that gas discharged by side of the positive electrode air chamber.

4., according to the electrochemical method described in claim 1 or 3, it is characterized in that:

The water that hydrogen fuel cell side of the positive electrode produces flows into gas-liquid separator with discharge gas, and after gas-liquid separation, water backflow supplies negative electrode and/or the anode of electrolyzer, recycles.

5., according to electrochemical method according to claim 1, it is characterized in that:

Described circuit connects, and the negative electrode of its electrolysis water unit electrolyzer, anode are connected with the negative pole of hydrogen fuel cell, positive pole respectively.

6., according to electrochemical method according to claim 1, it is characterized in that:

Comprise at least two electrolysis water units and each electrolysis water unit power supply unit separately; Power supply unit comprises at least one and reclaims power supply unit and an external power supply unit for Hydrogen Energy, described Hydrogen Energy reclaims power supply unit and adopts hydrogen fuel cell, and external power supply unit selects at least one in solar cell, direct methanol fuel cell, external communication electric network source; Described electrolysis water unit is water electrolytic cell;

Main unit is formed by least one hydrogen fuel cell and water electrolytic cell;

By at least one water electrolytic cell as auxiliary unit, be electrically connected with external power supply unit, for providing hydrogen make-up for hydrogen fuel cell;

Described main unit, auxiliary unit only have gas circuit to connect therebetween, do not have circuit to connect; The cathodic hydrogen gas circuit of water electrolytic cell is connected with fuel cell anode hydrogen gas circuit.

7., according to the electrochemical method described in claim 1 or 6, it is characterized in that:

Described direct methanol fuel cell power supply unit, adopting methyl alcohol to flow into negative pole as fuel, is that oxygenant flows into positive pole with oxygen-containing gas, generating supply water electrolytic cell;

Or described solar cell for supplying power unit, directly adopts the solar cell commercially produced product with water electrolytic cell required voltage and power match, generating supply water electrolytic cell;

Or described AC network power supply unit, directly adopts the direct supply commercially produced product of powering with the AC network of water electrolytic cell required voltage and power match, generating supply water electrolytic cell.

8., according to the electrochemical method described in claim 1 or 6, it is characterized in that:

Preferred external power supply unit is solar cell and AC network or adopts with the while of direct methanol fuel cell.

9., according to the electrochemical method described in claim 1 or 6, it is characterized in that:

Form between the hydrogen fuel cell of main unit and water electrolytic cell and connect one to one on circuit.