JP2010090473A - Apparatus for generating oxyhydrogen gas - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for generating an oxyhydrogen gas, which electrolyzes water by using an aqueous alkali solution to generate oxygen gas and hydrogen gas and takes out the gases in a mixed state and which has high efficiency and reliability. <P>SOLUTION: In the apparatus for generating the oxyhydrogen gas, an electrolytic cell for electrolyzing water has such a structure that both ends of a stainless cylinder 1 with flanges are each sealed with a stainless disk cap 4 through a rubber gasket 3. The inside of the stainless cylinder 1 is partitioned into a plurality of chambers by a plurality of stainless electrode disks 5, and the stainless cylinder 1 is electrically insulated from the periphery of the plurality of chambers by an alkali-resistant plastic 6. Further, each stainless electrode disk 5 is held by a ring-shaped, belt-shaped alkali-resistant plastic 7 so as to be fixed and electrically insulated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure and a structure of an oxyhydrogen mixed gas generating apparatus in which water is electrolyzed to generate oxygen gas and hydrogen gas and take them out in a mixed state. The gas can be burned to perform welding, fusing, thermal spraying, or the like.

  As a method of generating hydrogen and oxygen by electrolyzing water, there are a method of generating each gas in a separated state and a method of generating each gas in a mixed form. The present invention relates to an oxyhydrogen gas generator that generates hydrogen and oxygen in a mixed form.

  Conventionally, a mixed gas generator of hydrogen and oxygen has a structure in which a plurality of electrode plates are stacked inside an electrolytic cell, and a rubber insulating member is interposed between the electrode plates so that each electrode plate is isolated and insulated. Things are widely used. However, by using a rubber material as the insulation material between the electrode plates, over time, the electrolyte and heat will cause the rubber to deteriorate and deform, causing electrolyte leakage or poor insulation. This causes problems such as In addition, due to the structure of the electrolytic cell, the distance between the electrode plates is as narrow as about 3 mm. Not only does the electrolysis efficiency of the electrolyte decrease due to the deterioration of the rubbery material, but the heat generation is intense and the power loss increases. There is also a problem that time operation is impossible.

In addition, there are many cases where a square electrolytic cell is used, but there are many disadvantages in that the number of welded parts increases in production, which is disadvantageous in terms of reliability and production cost, and easily deforms against the generated gas pressure. . In addition, the dimensional accuracy inside the electrolytic chamber is likely to deteriorate, and there is a problem in the insulation of the electrode plate insulating support frame portion, which causes heat generation and easily reduces the efficiency of water electrolysis. In some cases, an epoxy resin electrode plate insulating support frame is used, but the workability is poor, and when multiple parts are combined, gaps are likely to occur in the connection area, leakage current is likely to occur, and electrical insulation In order to secure the performance, it is necessary to increase the processing accuracy of the electrode plate insulating support frame, which is disadvantageous in that it is complicated and expensive.
JP 2005-146302 A JP-A-11-001790 Japanese Patent Laid-Open No. 06-192868

  The present invention provides an oxyhydrogen gas generator capable of solving such a problem in a conventional mixed gas generator of hydrogen and oxygen and generating a hydrogen / oxygen mixed gas stably and efficiently. .

  Conventionally, a prismatic electrolytic cell is used, and a plurality of electrode plates are stacked inside the electrolytic cell, and a rubber-like insulating member is interposed between the electrode plates so that each electrode plate is isolated and insulated. Yes. In some cases, an epoxy resin electrode plate insulating support frame may be used, but the processability is poor, and when it is made by combining multiple parts, there is a problem that it tends to cause problems in electrical insulation, and it is expensive to ensure performance. .

  In the present invention, in an oxyhydrogen mixed gas generator that electrolyzes an alkaline aqueous solution to generate oxygen gas and hydrogen gas and take them out in a mixed state, the structure of the electrolytic cell for electrolyzing water is Is a cylindrical stainless steel with a flange sealed with a stainless steel electrode disc through a rubber packing, the inside of which is divided into a plurality of chambers with a stainless steel electrode disc, and the circumference and the inner surface of the stainless steel cylinder are made of a cylindrical alkali-resistant plastic In addition, each stainless steel electrode disk is sandwiched between ring-shaped strips of alkali-resistant plastic, fixed with good adhesion, and electrically insulated, which makes it efficient and reliable. A highly oxyhydrogen gas generator is provided.

  The oxyhydrogen gas generator is an apparatus that electrolyzes water to generate a mixed gas of hydrogen gas and oxygen gas. Electrolysis of water is an electrochemical reaction that occurs when electricity is passed through an electrolytic solution (aqueous electrolyte solution / KOH, NaOH, etc.). At the anode (+), hydroxide ions OH− react to emit electrons to the electrode to generate oxygen molecules O2 and water molecules. At the cathode (-), water molecules receive electrons and generate hydroxide ions OH- and hydrogen molecules H2. In this way, water is decomposed into hydrogen and oxygen by electricity and taken out as a gas. The oxyhydrogen gas generator in this apparatus is taken out as fuel gas in a mixed gas state without separating oxygen gas and hydrogen gas. The electrolyte of the electrolyte serves to facilitate the flow of electricity and promote the electrolysis of water. As a whole, only water (H 2 O) is consumed as gas by electrolysis, and the electrolyte remains without being decomposed, so that only water needs to be replenished. Since it is a device that electrolyzes water with a commercial power source and continuously generates oxygen and hydrogen, there is no need for cumbersome gas cylinders and it can be used as fuel immediately after the power is turned on. The oxyhydrogen gas generator is an apparatus that electrolyzes water and generates a mixed gas of hydrogen gas 2: oxygen gas 1 containing oxygen itself necessary for complete combustion. Since it is used immediately, it can be used safely without any environmental impact or risk of explosion.

  As an embodiment of the present invention, the structure of an electrolytic cell is shown in FIG. A potassium hydroxide aqueous solution (about 20-30 wt%) is used as the electrolytic solution. FIG. 1A is a cross-sectional view thereof, and reference numeral 1 denotes a stainless steel cylindrical tube (SUS304). In this embodiment, the inner diameter is 498 mm, the tube thickness is 5 mm, and flanges 2 are attached to both ends by welding. At both ends, 3 is a rubber packing (neoprene rubber), 4 is a stainless steel disc lid (SUS304, thickness 15 mm), and is electrically insulated and attached via a rubber packing with bolts and nuts having an insulating cylindrical sleeve. It has been. Reference numeral 5 denotes a stainless steel disc electrode (SUS316, thickness 1 mm). In the figure, only four sheets are drawn and others are omitted, but in this example, there are 19 sheets, and the electrolytic cell is divided into 20 chambers. 6 is a plastic insulating cylinder for insulating the electrolytic solution inside the stainless steel cylinder from the stainless steel. In this example, polypropylene was used. Reference numeral 7 denotes an electrode plate insulating support frame for fixing the position of each stainless steel electrode disk and electrically insulating each stainless steel electrode disk, and a belt-like polypropylene having a width of 15 mm and a thickness of 5 mm is formed into a ring shape. Used. A perspective view thereof is shown in FIG. 1B. Polypropylene is excellent in alkali resistance and heat resistance is practically sufficient. Teflon (fluorocarbon resin) can also be used instead of polypropylene. By adopting such a configuration, it is possible to easily realize an electrolytic cell with good insulation without a gap in the electrode plate insulating support frame portion. The electrolyte is filled enough to leave the upper fifth. Although not clearly shown in this figure, a hole with a diameter of about 15 mm is provided at the top of each stainless steel electrode disk, and a hole with a diameter of about 15 mm is provided on each stainless steel disk in a staggered manner below each other. ing. The upper hole is for taking out the generated gas, and the lower hole is for introducing the electrolyte. The reason why the holes at the bottom of each stainless steel electrode disk are staggered is to prevent the current flowing in the electrolyte from bypassing.

  A DC power supply is connected to the left and right stainless steel disc lids. The left and right stainless steel disc lids act as anodes and cathodes. If it does in this way, the electrolytic chamber divided by each stainless steel electrode disk will be connected in series, and the front and back of each stainless steel electrode disk will act as the anode and cathode of each electrolytic chamber. In the electrolysis of water, the voltage required for each electrolysis chamber is about 2V, so the voltage of about 40V-50V is required in the 20-room configuration of this embodiment. At this time, a current of about 200 A flows and oxyhydrogen gas of about 2400 liters per hour is generated.

  FIG. 1C is a front view of one of the stainless steel disc lids, which is an oxyhydrogen gas outlet 11, an electrolyte level gauge 12, a water replenishment port 13, an electrolyte outlet 14, and a DC power supply connection terminal. 15 is provided. The other stainless steel disc lid is provided with a connection terminal for a DC power source.

  If the surface area of the electrode plate is increased, the current increases in proportion to the same voltage, and the generated oxyhydrogen gas increases. Further, if the current is kept constant, the voltage is reduced and the efficiency of water electrolysis is improved. As a method for increasing the surface area of the electrode, it is conceivable to add unevenness to the surface or to add a mesh-like one. However, as a method that can ensure reliability with a simple structure, as shown in FIG. It is effective to provide a plurality of perforated stainless steel discs 5A having a structure provided at a certain interval with a gap of 2-3 mm and fix them to both surfaces of the electrode plate by a method such as welding. Of course, the electrodes at the extreme ends (stainless steel disc lids) are added only on one side. By doing so, an electrode surface area of about 3 times can be realized. If a plurality of perforated stainless steel plates are added to each electrode plate, the electrode surface area can be further increased.

  FIG. 3 shows the entire oxyhydrogen gas generator. 3A is a plan view and FIG. 3B is a front view. 3A is an electrolytic cell, and the generated oxyhydrogen gas becomes a gas output 34 through a water-type backfire preventer 32 and a water droplet filter / dry backfire preventer 33 by a gas hose pipe. Reference numeral 35 denotes a water tank for replenishing consumed water, and water is replenished to the electrolytic cell 31 by the pressure pump 36. By using the liquid level monitor of the electrolytic cell 31, automatic water supply can be achieved. Reference numeral 37 denotes a cooling fan for the heat generated by the electrolytic cell or the DC power source. Reference numeral 38 denotes a connection terminal to a commercial power supply 200V, 3 phase, 50A. Reference numeral 39 in FIG. 3B denotes a DC power supply, which employs a switching power supply system, and has a capacity of 50 V and 200 A. The switching power supply type has the advantages of small size, light weight and large capacity. This power source is a constant voltage and constant current control system, and can be applied to a constant gas generation condition and is easy to use. Reference numeral 40 denotes a control panel that controls the DC power supply 39 so as to maintain the set gas pressure by monitoring the ON / OFF operation of the power supply and the gas pressure in the electrolytic cell 31. The pressure was controlled at 0-0.5 MPa. In addition, a safety valve is provided in the electrolytic cell, and the temperature of the electrolytic cell is monitored to ensure a safe operation.

  As described above, in the present invention, an electrolytic cell for electrolyzing water in an oxyhydrogen gas generator that electrolyzes an alkaline aqueous solution to generate oxygen gas and hydrogen gas, and takes them out in a mixed state. The structure is a cylindrical stainless steel with a flange sealed at both ends with a stainless steel disc lid through rubber packing, and the inside is divided into multiple chambers with a stainless steel electrode disc, and the circumference and the stainless steel cylinder are alkali resistant It is electrically insulated with plastic, and each stainless steel electrode disk is sandwiched between ring-shaped and alkali-resistant plastics, and is fixed and electrically insulated. A high oxyhydrogen gas generator is realized.

It is sectional drawing and the front view of an electrolytic cell which show one Example of this invention oxyhydrogen gas generator. It is sectional drawing of one Example of electrode structure of the electrolytic cell in this invention oxyhydrogen gas generator. It is the top view and front view of one Example of this invention oxyhydrogen gas generator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stainless steel cylinder 2 Stainless steel cylindrical flange 3 Rubber packing 4 Stainless steel disk lid 5 Stainless steel electrode disk 5A Perforated stainless steel disk 6 Plastic insulating cylinder 7 Electrode plate insulating support frame 11 Oxyhydrogen gas outlet 12 Electrolyte level gauge 13 Water Supply Port 14 Electrolyte Discharge Port 15 DC Power Supply Connection Terminal 31 Electrolyzer 32 Water Type Backfire Prevention Device 33 Water Drop Filter / Dry Type Backfire Prevention Device 34 Gas Output 35 Water Tank 36 Pressure Pump 37 Cooling Fan 38 Power supply terminal 200V, three-phase connection terminal 39 DC power supply 40 Control panel

Claims (3)

In the oxyhydrogen mixed gas generator in which water is electrolyzed using an alkaline aqueous solution to generate oxygen gas and hydrogen gas, which are taken out in a mixed state, the structure of the electrolytic cell for electrolyzing water is: Both ends are cylindrical stainless steel with flanges that are electrically insulated through rubber packing and sealed with a stainless steel disc lid, and the inside is divided into multiple chambers by a plurality of stainless steel electrode discs. The cylindrical inner surface is electrically insulated by a cylindrical alkali-resistant plastic, and each stainless steel electrode disk is sandwiched and fixed between ring-shaped strips of an alkali-resistant plastic and is electrically insulated. An oxyhydrogen gas generator. 2. The oxyhydrogen gas generator according to claim 1, wherein polypropylene or Teflon is used as the alkali resistant plastic. 2. The electrode configuration of an electrolytic cell according to claim 1, wherein a stainless steel disc with holes is connected to both surfaces of the stainless steel disc with a gap, and a stainless steel disc with holes is connected to both ends of the stainless disc lid only on the inside. An oxyhydrogen gas generator characterized by the above.

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