Field of the Invention This invention relates to apparatus for generating the gas mixture (Brown gas) of hydrogen and oxygen by water electrolysis, particularly the Brown gas generator which enhances energy efficiency for water electrolysis by applying MHD (Magnetohydrodynamics) effects and catalytic effects to water electrolysis in magnetic field. Background and Object of the Invention

For this Brown gas to be widely used as a fuel source for human life, its generator has to be high in energy efficiency, small in volume, low in operation pressure, and safe in use.

Hydrogen gas generation by water electrolysis has a long history, but has not yet been widely used due to its large power consumption. Therefore, there have been recent researches to reduce power consumption when generating hydrogen and oxygen by water electrolysis, which has resulted in various solutions.

Those improved solutions, so far, mainly include increasing electrolysis efficiency due to the decomposition of water clusters and increase of active hydrogen content by processing water with magnetic field at the prior stage of the water electrolysis process; and due to the applying of magnetic field in the water electrolysis process.

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The PCT/US2011/057306 has disclosed the method to increase water electrolysis efficiency both by applying high magnetic field which is perpendicular to the electrolytic solution flow and parallel to electric current flow and by irradiating ultrasonic wave and infrared rays.

The Japan Patent JP 4796373 (PCT/JP2006/320908), meanwhile, has disclosed the method to increase water electrolysis efficiency by increasing activity of water molecules due to the decomposition of water clusters through magnetization processing of water at the prior stage of the water electrolysis process. In prior art, however, has only been considered the decomposition of clusters and increase of the magnetic susceptibility of water through magnetization processing of water, but has not observed the MHD effect by the interaction between the electric current passing through electrolytic solution and the magnetic field perpendicular to the electric current.

The object of the invention is to provide the high energy efficient Brown gas generator.

Description of the Invention

The present invention, in order to overcome the limitations of the prior art, causes asymmetric pulse current to pass through electrolytic solution by applying 50~300Hz of asymmetric pulse voltage to the electrode plates, and it applies the 3000-15000Gs of magnetic field perpendicular to electrolytic current throughout the electrolysis space, whereby causes asymmetric pulse vibration of water molecules and MHD propulsive power in the electrolytic solution, through the interaction between asymmetric pulse current and magnetic field, i.e. MHD effect. Then, inside the electrolyzer, there concurrently happens the increase in the activity of water molecules through decomposition of water clusters, and the decrease in the rate of bubble fillings, the decrease in the capacity of electric double layer on the electrode face, and the increase in the velocity of ion diffusion through propulsion of electrolytic solution, which all contribute to the promotion of water electrolysis. In the present invention, for further enhanced water electrolysis efficiency, the electrolytic solution include 2~5wt% of complex catalyst composed of 2~2.8wt% NaOH or KOH, 0.01~0.1wt% H ₂ Mo0 ₄ , 0.05~0.2wt% V ₂ 0 ₅ , and 0.01~0.05wt% Ce0 ₂ ..

Furthermore, the said invention provides information on safe use of hydrogen-oxygen gas mixture generator. The safety of hydrogen-oxygen gas mixture has to be thoroughly ensured in order to use the hydrogen-oxygen gas mixture as a fuel. For this purpose, in the present invention air pump be directly connected to gas-liquid separator so as to change 2:1 molar ratio of gas mixture immediately after its generation, the pressure of gas mixture controlled to below 0.2 atm., and the flashback arrester disposed at the distance of 50~200mm from the combustion burner which combusts gas mixture.

The hydrogen-oxygen gas mixture generator, according to the present invention, comprises the electrolytic device which generates combustible hydrogen-oxygen gas mixture from water, the air. pump which changes the generated hydrogen-oxygen gas mixture into safer combustible gas immediately after its gas-liquid separation, the power control device which supplies electric power to the electrolytic device and the air pump, and the combustion device equipped with flashback arrester. The electrolytic device comprises an electrolyzer and at least two magnetization device for magnetizing water and forming magnetic field in the electrolyzer, wherein the magnetic field of magnetizing device positioned around the conduit for electrolytic solution circulation is perpendicular to the directions of electrolytic solution flow, and the magnetic field of magnetizing device forming magnetic field in the electrolyzer is perpendicular to the current of the electrolyzer.

The electrolyzer includes at least two main electrodes and at least two minor electrodes, and the electrolytic solution flowing through the electrolyzer contains 2~5wt%, preferably 3~4wt% of complex catalyst composed of 2~2.8wt% NaOH or KOH, 0.01~0.1wt% H2M0O4, 0.05~0.2wt% V ₂ 0 ₅ , and 0.01~0.05wt% Ce0 ₂ . The flux density of the magnetization device is 3000-15000Gs and, preferably, 8000-13000GS.

The power control device comprises the conversion circuit configured to supply 50~300Hz, preferably 112~23Hz of asymmetric pulse current to the main electrode terminal of the electrolyzer and the DC terminals which supplies variable DC voltage · to the air pump.

The air pump changes hydrogen-oxygen gas mixture into safer combustible gas immediately after the separation of the gas-liquid mixture flowing via the ^' conduit for electrolytic solution circulation from the electrolyzer, wherein the outlet of the said air pump is directly connected to the upper part of the gas-liquid separator or the top position of upper part of the solution supply cask linked through to it.

These, in turn, can also be used as buffer space of the air pump.

The volume control of the said air pump is performed by the voltage regulator which controls the DC voltage supplied to the input power terminal of the air pump from the power control device within the range of 2-12V, and, thus, the generator has operation pressure of below 0.2atm.

Once the generator operates, the 1 13~226Hz, 150-220V of asymmetric pulse voltage is applied between the main electrode terminals of the electrolyzer, and 3-4A of asymmetric pulse" current is flowed, wherein the voltage between each adjacent electrodes is about 1.34-1.96V.

Due to the interaction between the asymmetric pulse current flowed to electrolyzer and 8000-13000Gs of flux density of magnetic field perpendicularly applied to this current, water cluster decomposition effect is generated in the electrolytic solution between the electrodes of electrolyzer to enhance the electrode reaction activity of water molecule.

Meanwhile, due to the interaction between the asymmetric pulse current and magnetic field, the propulsive force of electrolytic solution toward the top position of electrolyzer is generated to accelerate the liquid circulation, to enhance the release velocity, of foam, created in the electrolytic solution, to reduce the electric resistance of electrolytic solution, and at last to consume less energy to realize the water decomposition, that is, the effect of hydrogen-oxygen gas generation from the water electrolysis is enhanced due to the combination of water cluster decomposition by the discontinuous MHD vibration and the propulsive force by the MHD effect, wherein the content of complex catalyst in the electrolytic solution is about 4 percent.

The 2:1 molar ratio of hydrogen-oxygen gas mixture generated by the electrolytic device is mixed with the air inserted from the air pump to become the inexplosive fuel > gas, which is passed through the first dehumidifier and .the, second dehumidifier to ; ·, _. become> mixed more, uniformly with moisture, .removing,, .a ,. _. flashback arrester to be burned in the burner at last.

It is addressed that once said complex catalyst is- combined with the MHD effect, efficiency of water decomposition can be more enhanced. ^. _¾ ^,

Embodiments of the invention

Fig. is the schematic diagram of the hydrogen-oxygen cjas mixture generator according to the present invention.

Fig.2 is an example of the waveform of asymmetric pulse current supplied to the electrolyzer from the power control device.

The water electrolysis hydrogen-oxygen gas mixture generator 14 as shown in Fig.1 comprises electrolytic device 13, air pump 7, power control device 6, gas-liquid separator 2, electrolytic ^' solution supply cask 1 , first dehumidifier 8, second dehumidifier 9, combustion unit 10, liquid inlet 11 with airtight†ap, and liquid exhaust valve 12. The electrolytic device 13 is composed of electrolyzer 3, magnetization device 5 and magnetic field forming device 4, wherein the electrolyzer 3 is built with at least two main electrodes and at least two minor electrodes hermetically assembled at 2~3mm intervals with each other and is designed to decompose water into hydrogen and oxygen when electric current passes through its main electrodes 3b and 3c.

The outlet 3a and inlet 3d for the electrolytic solution circulation of the electrolyzer 3 are respectively connected with pipe to the inlet 2b and outlet 2c for the electrolytic solution circulation of the gas-liquid separator 2.

The magnetization device 5 for decomposing water clusters and activating water molecules comprises at least two' permanent magrets and a yoke, and is placed around the conduits between outlet 2c and inlet 3d for electrolytic solution circulation so as to form the magnetic field perpendicular to the direction of electrolytic solution flow.

The device 4 for forming the magnetic field perpendicular to the current flow inside the electrolyzer is composed of at least two permanent magnets and a yoke, wherein the said magnets are insulated and placed to both sides of the electrolyzer.

The power control device 6 converts input power into 50~300Hz asymmetric pulse current so as to apply the current of the waveform as shown in Fig.2 to the electrolyzer, wherein the conversion output terminals 6b and 6c of the said power control device are connected respectively to the main electrodes 3b and 3c of the electrolyzer.*

Furthermore, the power control device 6 produces variable DC power within the range of 2-12v, using its voltage regulator 6d, wherein the DC terminal 6a of said power control device is connected to the input terminal 7b of air pump 7.

The air pump 7 changes the generated hydrogen-oxygen gas mixture into safer combustible gas immediately after its gas-liquid separation, wherein the outlet 7a of the said air purpp is connected with hose'to air inlet 2a on the top position of the upper part of the gas-liquid separator 2.

Then, . said upper part of the gas-liquid separator 2 and the said upper part of the electrolytic solution supply cask 1 connected thereto are also used as .the buffer space of the air pump 7.

The first dehumidifier 8 and the second dehumidifier 9 separate moisture from the hydrogen-oxygen gas mixture produced by the electrolytic device 3. The first dehumidifier 8 has a tube charged with corrosion-proof metal sieves, wherein the inlet of the said first dehumidifier is connected to the upper pipe of the gas-liquid separator 2, and the outlet of the said first dehumidifier is connected to the inlet of the second dehumidifier 9 at a certain degree of angle. The second dehumidifier 9 is a vertical cyclone, wherein the upper outlet pipe 9a is connected with pipe to the inlet 10a of the combustion device 10 with flashback arrestor, and the lower outlet pipe 9b is connected to water recycle pipe 5.

The combustion device 10 equipped with the flashback arrestor produces a safe dispersed flame by the ignition of dried hydrogen-oxygen gas mixture, and is mounted on the upper part of the hydrogen-oxygen gas mixture generator 14.

In preferable embodiment wherein 113 of stainless steel electrodes are hermetically assembled at 2~3mm intervals with each other, asymmetric pulse, voltage is 150~220V, frequency is 226 Hz, asymmetric pulse current is- 4A and- 12000Gs of magnetic field forming device, 700-1000 litres of combustible.. gas per. hour is . produced with , 0,6~0.88Kw of electric power. The operation pressure of the hydrogen-oxygen gas mixture generator is below 0.2atm and energy efficiency is 86%~91,%.

Said embodiment is not limiting the range of the invention claim, but it, is only intended to help better understand the present invention and there are still a variety of other practical applications well known to specialists that do not exceed the range of claim.