WO2004068033A1

WO2004068033A1 - Superheated steam producing device

Info

Publication number: WO2004068033A1
Application number: PCT/JP2004/000738
Authority: WO
Inventors: Toshio Aoshima; Hiromizu Tezuka
Original assignee: Izumi Information Co., Ltd.
Priority date: 2003-01-28
Filing date: 2004-01-28
Publication date: 2004-08-12
Also published as: US20060236957A1; JPWO2004068033A1; CN1745279A; EP1591719A1; EP1591719A4; JP2004233040A

Abstract

A method and device for easily producing a large amount of high- temperature superheated steam from water are provided. Use is made of a superheated steam producing device comprising a sleeve (1) of heat-resistant material having a water jet introducing hole at one end (1a) and a spout port (3) for superheated steam at the other end (1b), an exciting coil (5) wound around the outer periphery of the sleeve (1), air-permeable heating subject bodies (4) of electrically conductive material charged into the sleeve (1). Water is spouted into the sleeve from one end (1a) of the sleeve (1) charged with the air-permeable heating subject bodies (4) of electrically conductive material, and then the air-permeable heating subject bodies (4) charged into the sleeve (1) are subjected to high frequency induction heating, whereby high-temperature superheated steam is spouted in large quantities from the spout port (3) in the other end (1b) of the sleeve (1).

Description

Description Superheated steam generator Technical field

The present invention relates to a technique for generating superheated steam, and more particularly to providing a technique for easily generating a large amount of superheated steam. Background art

Superheated steam is a high-temperature steam that does not contain harmful components, and thus is suitably used for sterilizing and sterilizing foods.

As a technique for generating superheated steam, for example, there is a technique disclosed in Japanese Patent Application Laid-Open No. 8-135903, in which an alternating current is applied to a coil to cause a metal body to generate heat by electromagnetic induction, and the steam is heated by the heat. Water vapor (superheated steam) of 100 ° C or higher is generated by contact and circulation with the body surface. As another technique, for example, as disclosed in Japanese Patent Application Laid-Open No. 9-142473, water is evaporated by a steam boiler, and the evaporated steam is heated to a high temperature by burning fuel. However, it is not easy to generate a large amount of high-temperature superheated steam with the conventional electromagnetic induction heating technology, and it is also difficult to generate high-pressure superheated steam. Disclosure of the invention

The present invention solves the above-mentioned problems of the related art, and thus provides a superheated steam generator and a method of generating high-pressure superheated steam having the following configurations.

(1) A tubular body made of a heat-resistant material having an injection hole for injection water at one end and an outlet for superheated steam at the other end, and an exciting coil wound around the outer periphery of the tubular body. A superheated steam generator, comprising: a permeable heated body made of a conductive material loaded in a cylindrical body. (2) — A tubular body made of a heat-resistant material having an injection hole for water injection and a steam introduction hole at one end, and an outlet for superheated steam at the other end, and wound around the outer periphery of the cylindrical body A superheated steam generator comprising: an excitation coil provided in the above-described manner; and a permeable heated body made of a conductive material, which is loaded in the cylindrical body.

(3) — A tubular body made of a heat-resistant material in which water is introduced from one end and superheated steam is ejected from the other end, and heat is generated by electromagnetic induction loaded in the tubular body and heating the sprayed water. A superheated steam generator comprising: an air-permeable heating element made of a conductive material; and electromagnetic induction heating means.

(4) A tubular body made of a conductive material having an injection hole at one end and an outlet for superheated steam at the other end, and a heat-resistant material coated on the outer peripheral surface of the tubular body Overheating characterized by comprising a refractory material made of stainless steel, an exciting coil wound around the outer periphery of the refractory material, and a permeable heated body made of a conductive material loaded in the cylindrical body. Steam generator.

(5) The superheated steam generator according to any one of (1) to (4), wherein the heat-resistant material is ceramics, and the conductor material is metal.

(6) The superheated steam generator according to any one of (1) to (5), further including an injection hole for ejecting a liquid other than water at one end of the cylindrical body.

(End) The superheated steam generation according to any one of the above (1) to (5), characterized in that one end of the cylindrical body is provided with an introduction hole for an injection liquid of water and another liquid. apparatus.

(8) The superheated steam generator according to any one of the above (2) to (7), further comprising an introduction hole for water vapor and another gas at one end of the cylindrical body.

(9) The superheated steam generator according to any one of the above (6) to (8), wherein the liquid or gas other than water contains an organic chlorine compound.

(1) The above-mentioned (1) to (9), wherein the temperature of the superheated steam spouted from the spout at the other end of the tubular body made of a heat-resistant material is from 12 ° C to 80 ° C. The superheated steam generator according to any one of the above. (11) One type of heating element made of a conductive material that has been destroyed in a cylindrical body, selected from a rod, a wire, a plate, an 82 cam material, a net, a sphere, a hollow sphere, or an irregular mass Or the superheated steam generator according to any one of the above (1) to (1), which is a combination of two or more types.

(12) The superheated steam generator according to any one of (1) to (11), wherein the heating element made of a conductive material and loaded in the cylindrical body is a magnetic substance.

(13) The superheated steam generator according to any one of the above (1) to (12), wherein the tubular body made of a heat-resistant material is made of a non-magnetic material.

(14) Water is sprayed into the cylinder from one end of a tubular body made of a heat-resistant material loaded with a breathable heated body made of a conductive material, and then the breathable jacket is loaded into the tubular body. A method for producing high-pressure superheated steam, characterized in that high-temperature superheated steam is ejected from the other end of the cylindrical body by high-frequency induction heating of the heating body.

(15) Water and steam are injected into the cylinder from one end of a cylindrical body made of a heat-resistant material loaded with an air-permeable body made of a conductive material, and then loaded into the cylindrical body A method for generating high-pressure superheated steam, wherein high-temperature superheated steam is ejected from the other end of the cylindrical body by performing high-frequency induction heating on the air-permeable heated object.

(16) The superheated steam generator according to any one of (14) and (15), wherein the tubular body made of a heat-resistant material is made of a non-magnetic material. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic explanatory view of a superheated steam generator according to an embodiment of the present invention, and FIG. 2 is a diagram showing examples of various shapes of a gas-permeable heated body used in the present invention.

Explanation of reference numerals

1: cylindrical body, 1 a: one end of cylindrical body 1,

1 b: The other end of the cylindrical body 1, 2: Injection nozzle of the injection water,

3: Superheated steam spout, 4: Ventilated heated object, 5: excitation coil, 6: covering material,

7: conduit, 8: pressurized steam generator,

40: Punched metal plate,

4 1: Punched metal plate retainer,

H V: Superheated steam, V1, V2: On-off valve, V3, V4: Check valve Best mode for carrying out the invention

The present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a schematic explanatory view of a superheated steam generator according to an embodiment of the present invention, and FIG. 2 is a view illustrating an embodiment of a gas-permeable non-heated body.

In the figure, 1 is a cylindrical body, 1a is one end of the cylindrical body, 1b is the other end of the cylindrical body, 2 is a nozzle for introducing jet water, and 3 is an outlet for superheated steam. Reference numeral 4 denotes an air-permeable heated object, 5 denotes an excitation coil, 6 denotes a coating material, 6 denotes a conduit, 8 denotes a pressurized steam generator, and 40 denotes a punching metal plate. HV is superheated steam, V1 and V2 are on-off valves, and V3 and V4 are check valves.

In FIG. 1, one end 1a of a tubular body 1 made of a conductive material is provided with an injection nozzle 2 for injection water, and the other end 1b is provided with a jet 3 of superheated steam.

The outer peripheral surface of the cylindrical body 1 is covered with a coating 6 made of castable refractory ceramics, and is insulated. Then, an exciting coil 5 for supplying a high-frequency current is wound around the outer peripheral surface of the ceramic coating material 6 and connected to a high-frequency current power supply (not shown).

In addition, a permeable body 4 made of a conductive material (stainless steel sphere in FIG. 1 (see FIG. 2 (a))) is loaded in the cylindrical body 1, and the excitation coil 5 Heat is generated by electromagnetic induction, and the water or steam passing therethrough is heated to a high temperature and becomes superheated steam HV, which is jetted from the jet 3 at the other end 1b. 40 is a punching metal plate.

In addition, an inlet nozzle 2 for water spray provided at one end 1 a of the cylindrical body 1 is connected to a water supply pump P via a conduit, and is further connected to a pressurized steam generator 8. . In order to inject the jet water from the jet nozzle 2 into the cylindrical body 1, the on-off valve V2 provided on the way from the pressurized water vapor generator 8 is closed and the on-off valve V1 is opened. To inject the injection water and pressurized steam into the cylindrical body 1, the on-off valve V2 is opened and the on-off valve V1 is opened. V3 and V4 are check valves. In the present invention, water or water and water vapor are sprayed into the cylindrical body 1 from one end 1a of the cylindrical body 1 loaded with the air-permeable heated body 4 made of a conductive material. Water or water vapor passes through the air-permeable heated body 4 loaded in the body 1. At that time, since the air-permeable heated body 4 is heated and heated by electromagnetic induction by the exciting coil 5, the water or steam passing therethrough is heated to a high temperature, and the other end 1b of the cylindrical body 1 is ejected. From 3 superheated steam HV is emitted.

Reference numeral 40 denotes a punched metal plate. The punching metal 40 prevents the gas-permeable heated body 4 loaded in the tubular body 1 from flowing out of the tubular body 1. Reference numeral 41 denotes a punched metal plate retainer, which is preferably a material having high thermal conductivity and good heat resistance (for example, copper or silver). In this case, the plate is made of copper and has an upper and lower double plate structure. The bridge plate 41c is connected between 1a and the plate 41b to form a structure. A long leg 41d protrudes from the plate 41b, and is immersed between the air-permeable heated bodies 4,.

Therefore, the high heat of the air-permeable heated object 4 · 'always propagates through the long leg 41d to maintain the high temperature of 41b, 41c, and 41a, and the jet sprayed from the jet nozzle 2 of the jet water It is guaranteed that the water will evaporate immediately and continuously without a drop in temperature. When high-frequency induction heating of the air-permeable heated body 4 loaded in the cylindrical body 1 by injecting water is performed, the frequency is increased by a factor of 10 to 10 compared to the case where steam is introduced into the cylindrical body and heated. Superheated steam of about 10 times the amount can be generated. Therefore, high-pressure superheated steam can be easily extracted from the other end of the cylindrical body.

That is, 22.4 liters of water vapor is 18 g, but 18 ml of water is 18 g, so theoretically, if 18 ml of water is injected into the cylindrical body 1, twenty two, 400 m 1 of steam is generated, and eventually, 22,400 m 1 ÷ 18 m 1 = 1240, so that when water is injected and heated, about 1200 times more compressed steam is generated than when steam is introduced and heated It will be. Therefore, the pressure of the generated pressurized steam is also very high. When passing through the cylindrical body 1, the water or steam comes into contact with the heated air-permeable heated body 4, is further heated to form superheated steam, and is gradually expanded while being gradually expanded. To the discharge side.

Even if the temperature of the inside of the cylindrical body 1 rises and the power of the exciting coil 5 is turned off, the temperature of the air-permeable heated body 4 is high, and the temperature inside the cylindrical body 1 decreases by cooling. However, it takes time after cooling. Examples of the conductive material of the air-permeable heated body 4 include strong magnetic metals such as iron, SUS430 and SUS403 of stainless steel, weak magnetic metals such as nickel and titanium, and carbon such as carbon carbide. Ceramic can be used.

As the conductive material of the air-permeable heated body 4, a magnetic metal material, particularly a hard magnetic material, is particularly preferable. The air-permeable heated body 4 needs to allow steam to smoothly pass through the tank, and uses rods, wires, plates, 82 cams, nets, spheres, hollow spheres, or irregularly shaped masses, etc. be able to. They may be perforated. Example:

Superheated steam is generated from water using the superheated steam generator shown in Fig. 1 (however, a hollow sphere having openings in some places shown in Fig. 2 (b) is used as the air-permeable heated object 4). I let it.

First, the jet water was sprayed at a jet pressure of 4 to 6 kgZcm ² 6-1 kg / h from the jet nozzle 2 arranged in one end 1 a of the cylindrical body 1. At this time, the pressurized steam generator 8 was not used, so the on-off valve V2 was closed and the on-off valve V1 Was opened.

The cylindrical body 1 has an inner diameter of 20 cm and a length of 4 cm, and the body to be heated is made of a magnetic metal material made of ferritic stainless steel (SUS 430), preferably made of carbon steel. Use austenitic stainless steel (SUS 304).

A high-frequency current having a frequency of 2 kHz is supplied to the excitation coil 5 at 25 to 3 kwZh.

As a result, superheated steam HV was continuously ejected at a temperature of 3 to 320 ° C. Industrial applicability

According to the invention of the present application, water or water and water vapor are injected into the cylinder from one end of the tubular body loaded with the air-permeable heated body made of a conductive material, and then loaded into the cylinder body in the following manner. In order to perform high-frequency induction heating of the air-permeable heated body, compared with a case where steam is introduced into the cylindrical body and heated, the superheated steam is several hundred times to about 100 times the amount of superheated steam. Superheated steam can be easily ejected from the other end of the cylindrical body.

The high-temperature superheated steam obtained by the present invention is used for sterilizing cereals such as barley, cinnamon, and beans, and fruit and vegetables such as strawberries and tomatoes, or roasting coffee beans and tea, and from contaminated soil. It can be used for purification of contaminated soil by vaporization and separation of volatile harmful substances (for example, organochlorine harmful substances).

Claims

1. An injection hole for injection water is provided at one end and a superheated steam injection port is provided at the other end. A tubular body made of a heat-resistant material, an exciting coil wound around the outer circumference of the tubular body, A superheated steam generator characterized by comprising an air-permeable heated body made of a conductive material loaded in the body.

Eleven principal

2. A cylindrical body made of a heat-resistant material having an inlet for water injection at one end and an inlet for water vapor at one end and an outlet for superheated steam at the other end. A superheated steam generator comprising: an excitation coil; and an air-permeable heated body made of a conductive material loaded in the cylindrical body. Enclosure

3. Heat is generated by a cylindrical body made of a heat-resistant material in which jet water is introduced from one end and superheated steam is jetted out from the other end, and electromagnetic induction for heating the jet water loaded in the cylindrical body. An electromagnetic induction heating means provided with a gas-permeable heat-generating body made of a conductive material as described above.

4. A cylindrical body made of a conductive material with an injection hole for injection water at one end and a jet port for superheated steam at the other end, and a heat-resistant material coated on the outer peripheral surface of the cylindrical body A superheated steam comprising: a refractory material; an excitation coil wound around the outer periphery of the refractory material; and a permeable heated body made of a conductive material loaded in the cylindrical body. Generator.

5. The superheated steam generator according to any one of the above items 1 to 4, wherein the heat-resistant material is ceramics and the conductor material is metal.

6. The superheated steam generator according to any one of the above items 1 to 5, characterized in that one end of the cylindrical body is provided with a hole for introducing a liquid jet other than water. .

7. The superheated steam generator according to any one of the above items 1 to 5, characterized in that one end of the tubular body is provided with a hole for introducing a spray of water and another liquid.

8. The superheated steam generator according to any one of the above items 2 to 6, further comprising an inlet for introducing steam and another gas at one end of the tubular body.

9. The superheated steam generator according to any one of the above items 6 to 8, wherein the liquid or gas other than water contains an organic chlorine compound.

10. Any one of the above items 1 to 9, wherein the temperature of the superheated steam spouted from the spout at the other end of the cylindrical body made of a heat-resistant material is 120 to 8 ° C. A superheated steam generator according to item 1.

1 1. The heating element made of a conductive material loaded in the cylindrical body is one or two selected from a rod, a wire, a plate, an 82-member, a net, a sphere, a hollow sphere, or an irregular mass. 10. The superheated steam generator according to any one of the items 1 to 10, wherein the number is at least one.

1 2. The superheated steam generator according to any one of the above items 1 to 11, wherein the heating element made of a conductive material loaded in the cylindrical body is a magnetic substance.

1 3. The superheated steam generator according to any one of the above items 1 to 12, wherein the tubular body made of a heat-resistant material is made of a non-magnetic material.

1 4. A breathable object made of a conductive material is loaded, water is sprayed into the cylinder from one end of a tubular body made of a heat-resistant material, and then the air-permeable body loaded in the tubular body is made. A method for producing high-pressure superheated steam, wherein high-temperature superheated steam is generated from the other end of the tubular body by high-frequency induction heating of the heating body.

1 5. Water and water vapor were injected into the cylinder from one end of a tubular body made of a heat-resistant material loaded with a gas-permeable body made of a conductive material, and then loaded into the tubular body. A method for generating high-pressure superheated steam, wherein high-temperature superheated steam is ejected from the other end of the tubular body by high-frequency induction heating of the air-permeable heated body.

16. The superheated steam generator according to any one of 14 to 15, wherein the tubular body made of a heat-resistant material is made of a nonmagnetic material.