JP2008261547A - Steam superheater and use application - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem in which conventional technologies require the use a large and expensive device to generate superheated steam heated to 100°C or higher and, for that reason, a steam superheater capable of easily and inexpensively generating such superheated steam for a short time is required. <P>SOLUTION: Steam is introduced to a thermal plasma device as plasma gas, is made a plasma state and is converted to superheated steam. The temperature can be adjusted by plasma current or the introduction amount of the steam. The heated steam in the plasma state has a large bactericidal effect and the bactericidal effect is achieved when the heated steam is used for drying. Thus, this enables storage for a long period. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a superheated steam generator capable of generating superheated steam heated to 100 ° C. or more, and more particularly to a superheated steam generation method capable of generating superheated steam at a low cost with a simple configuration and its use. .

A conventional superheated steam generator is composed of, for example, a steam generating section that heats water to generate steam, and a heating section that heats the steam generated by the steam generating section under pressure in a tank. ing. This superheated steam generator according to the prior art heats pressurized steam in a tank, and thus can generate a large amount of superheated steam, but requires a high-powered large heating unit, There was a problem of increasing the cost.

          In recent years, a method of generating heated steam that is not pressurized has been considered. Patents relating to techniques for heating superheated steam by using electromagnetic induction to generate superheated steam include Patent Documents 3, 4, 5, 6, 8, 9, 11, 12, 16, and 18. Further, Patent Documents 1, 10, 13, and 15 are related to a technique for generating superheated steam by heating steam by gas heating. There is Patent Document 2 relating to a technique for generating superheated steam by microwave heating of steam. Patents 14 and 16 relate to the generation of superheated steam by heating steam with an electric heater. Patents relating to control of generation of superheated steam include Patent Documents 7 and 17.

        However, the superheated steam generator using electromagnetic induction heats the derivative and needs to cool it, which consumes useless energy. In addition, the heat resistance of the derivative material is also a problem. An apparatus for generating superheated water vapor using a microwave is expensive for a microwave power source and is expensive. The superheated steam generator by gas overheating is suitable for large size as used in commercial thermal power plants, but small size is difficult to control temperature.

        An apparatus that generates superheated steam using electromagnetic induction or microwaves is expensive, and it takes time to generate superheated steam. Particularly in medical institutions, it is desired to disinfect small tools such as tweezers and test tubes. However, since it takes time to start up and requires a large device, nurses etc. can be easily used in hospital rooms, for example. There is a problem that it is difficult to disinfect by heating. Moreover, when using for a small drying apparatus, it is requested | required that it should be cheap.

        An object of the present invention is to eliminate the above-mentioned problems of the prior art, and to provide an apparatus that generates heating steam in a short time with a small size and light weight. There are no documents or patents that generate superheated steam by heating the steam of the present invention with thermal plasma.

Patent Publication 2006-292202 Water vapor generating spacer and water vapor generating apparatus Patent Publication 2006-275351 Gas Heating Device Patent Publication No. 2006-092938 Superheated Steam Generator Patent Publication 2006-090587 Superheated Steam Generator Patent Publication 2006-071180 Superheated Steam Generator Patent Publication 2006-071116 Superheated Steam Generator Patent publication 2005-315568 superheated steam generator and control device Patent Publication 2005-308385 Gas Heating Device Patent Publication 2005-201606 Heating Device Patent Publication 2004-069168 Superheated Steam Generator Patent Publication 2003-203751 Electromagnetic Induction Superheated Instantaneous Steam Generator Patent Publication 2003-297537 Superheated Steam Generator Patent Publication 2002-333103 Superheated Steam Generation Method and Apparatus Patent Publication 2002-286228 Heating Device Patent Publication 2000-74307 Method for generating atmospheric superheated steam Patent Publication 2000-121006 Simple small source of superheated steam Patent publication 07-151302 Superheated steam generator, control device and method International Publication WO2004 / 068033 Superheated Steam Generator

In order to achieve the above object, the present invention is a superheated steam generator for generating superheated steam heated to 100 ° C. or higher under normal pressure conditions, wherein saturated steam is introduced as a plasma gas into a thermal plasma device, and plasma is generated. Since it is characterized by producing superheated steam, the apparatus cost is relatively low, the size and weight can be reduced, and the generation of superheated steam can be performed in a short time.

As described above, the superheated steam generator according to the present invention can produce superheated steam at a lower cost in a shorter time than the conventional method because the steam is heated by plasma. In addition, since water vapor is converted into plasma to form superheated water vapor, the water molecules are in a plasma state of oxygen atoms, hydrogen atoms and electrons, so that the sterilization effect is large, and the sterilization effect is greater than the superheated water vapor generated by the conventional method. Since the sterilization effect is great, even if it is used for drying, it has a sterilization effect, so that the dried product can be stored for a long time.
The present invention can be used safely because the temperature can be easily controlled by the plasma current and the amount of introduced steam.

Hereinafter, a superheated steam generator according to an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram for explaining the overall configuration of the superheated steam generator according to the present embodiment.

      The steam used in this embodiment is a steam produced by a conventional heating method, and is not particularly limited. With reference to FIG. The thermal plasma device used here is a DC arc plasma device, such as a high-frequency induction plasma generator, which has a large heat capacity and is considered to be in the same temperature, that is, a local thermal equilibrium state between electrons, ions and neutral gas. .

      The plasma current flows from the rod cathode 1 to the nozzle anode 2. The plasma gas is introduced from 3, is converted into plasma, the temperature rises, and the plasma gas is discharged from 5. Additional steam can be additionally introduced from 4 and mixed with the plasma to reach the specified temperature. Further, the temperature of the superheated steam can be adjusted by adjusting the plasma current flowing from the rod cathode 1 to the nozzle anode 2. Further, the temperature of the superheated steam can be adjusted by simultaneously adjusting the additional steam introduced from 4 and the plasma current flowing between the electrodes. The operation state will be specifically described. If steam is generated, superheated steam can be generated immediately.

The figure for demonstrating the whole outline | summary of the superheated steam generator by one Embodiment of this invention. k

Explanation of symbols

1: Rod cathode, 2: Nozzle anode, 3: Plasma gas inlet, 4: Steam, 5: Plasma (superheated steam)

Claims (3)

    A method and apparatus for heating steam with thermal plasma to produce superheated steam.       2. The method and apparatus according to claim 1, wherein water vapor is used as a plasma gas used for thermal plasma.     Method for using superheated steam generated in claim 1 for sterilization purposes

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