JP2023037256A - Superheated steam generation device - Google Patents

Abstract

To simplify and downsize the device configuration of a superheated steam generation device.SOLUTION: A superheated steam generation device comprises a steam generation part 2 for generating steam from water by energizing and heating a first conductor pipe 21 having a helical shape, a superheated steam generation device 3 for generating superheated steam from steam by energizing and heating a second conductor pipe 31 having a helical shape, and a steam separator 4 for separating water from steam. The first conductor pipe 21 and the second conductor pipe 31 are arranged concentrically with each other. The steam separator 4 is arranged inside the first conductor pipe 21 or the second conductor pipe 31.SELECTED DRAWING: Figure 1

Description

The present invention relates to a superheated steam generator.

As a conventional superheated steam generator, for example, as shown in Patent Document 1, one having a steam generator that generates steam from water and a superheated steam generator that generates superheated steam from steam is considered. This superheated steam generator is of a so-called transformer type, and each of the steam generator and the superheated steam generator winds an induction coil, which is a primary coil, around the leg iron core, and It has a configuration in which a heating conductor tube, which is a secondary coil, is wound around the outside.

However, the above transformer method requires a primary coil and an iron core in addition to the heating conductor tube, resulting in a large number of parts and a large installation space. Moreover, the weight of the superheated steam generator increases, and the manufacturing cost also increases.

JP 2017-116183 A

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-described problems, and its main object is to simplify the configuration of the superheated steam generator and to reduce the size of the superheated steam generator.

That is, the superheated steam generator according to the present invention includes a steam generator that electrically heats the first spiral conductor pipe to generate steam from water, and a second spiral conductor pipe that is electrically heated to generate superheated steam from steam. and a steam-water separator that separates water from steam, wherein the first conductor pipe and the second conductor pipe are arranged concentrically with each other, and the steam-water separator is arranged inside the first conductor tube or the second conductor tube.

With such a configuration, the first spiral conductor tube and the second conductor tube are electrically heated to generate superheated steam, so the primary coil and iron core in the transformer system can be eliminated. As a result, the number of parts of the superheated steam generator can be reduced and the device configuration can be simplified. Moreover, since the primary coil and the iron core are not required, the superheated steam generator can be downsized, and the installation space can be reduced. In addition, manufacturing costs can be reduced, and the weight of the device can be reduced.
In particular, in the present invention, the first conductor pipe and the second conductor pipe are arranged concentrically with each other, and the steam-water separator is arranged inside the first conductor pipe or the second conductor pipe. can be further miniaturized, and the installation space can be reduced.

As a specific arrangement mode of the superheated steam generator, the first conductor pipe is arranged below the second conductor pipe, and the steam-water separator is arranged between the first conductor pipe and the second conductor pipe. It is desirable to be arranged inside the second conductor tube.
By arranging the air-water separator inside both the first conductor pipe and the second conductor pipe, the capacity of the air-water separator can be increased as much as possible while downsizing the superheated steam generator, Water can be reliably separated with a compact configuration.

As a specific embodiment for electrically heating the first conductor pipe and the second conductor pipe, the steam generator has a first DC power supply that supplies DC power to the first conductor pipe, and the It is desirable that the superheated steam generator has a second DC power supply that supplies DC power to the second conductor pipe. Note that the first DC power supply and the second DC power supply may be a common DC power supply.
By energizing and heating the first conductor pipe and the second conductor pipe with the DC power source in this manner, there is no fear of being induction-heated even if the air-water separator is constructed using a magnetic material. As a result, the space inside the first conductor pipe or the second conductor pipe can be effectively used, and the superheated steam generator can be miniaturized.

As a specific mode of control of the steam generating section and the superheated steam generating section, the steam generating section electrically heats the first conductor tube by constant power control based on latent heat of vaporization to obtain a desired amount of steam. It is preferable that the superheated steam generating section electrically heats the second conductor pipe by temperature control for achieving a desired superheated steam temperature. With this control, it is possible to generate a desired amount of superheated steam at a desired temperature. Here, the constant power control based on the latent heat of vaporization includes constant power control in consideration of the sensible heat of water, the heat radiation of the conductor pipe, etc., in addition to the latent heat of vaporization of water.

In order to automatically supply the amount of water supplied to the first introduction pipe, it is desirable to further include an adjustment valve for adjusting the amount of water supplied to the first conductor pipe.

In order to improve the durability of the device, it is desirable that the first conductor tube and the second conductor tube are made of stainless steel or a nickel-based alloy.

According to the present invention configured in this way, the configuration of the superheated steam generator can be simplified and the size can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows typically the structure of the superheated steam generator of one Embodiment of this invention. It is a system flow diagram of the superheated steam generator of the same embodiment. It is a top view which shows arrangement|positioning of the 1st conductor pipe and air-water separation part of the same embodiment. It is a top view which shows arrangement|positioning of the 2nd conductor pipe and air-water separation part of the same embodiment.

An embodiment of a superheated steam generator 100 according to the present invention will be described below with reference to the drawings.

<1. Device configuration>
The superheated steam generator 100 according to the present embodiment generates superheated steam by heating water. As shown in FIGS. 1 and 2, a steam generator 2 that generates steam from water, steam A superheated steam generator 3 that generates superheated steam from the superheated steam, a steam-water separator 4 that separates water from the steam, a first connection pipe 5 that connects the steam generator 2 and the steam-water separator 4, and a steam-water separator 4 and a second connection pipe 6 that connects the superheated steam generator 3 .

<2. Water vapor generator 2>
The steam generator 2 generates steam from water by energizing and heating the spiral first conductor pipe 21 .

Specifically, the steam generating unit 2 includes a spiral first conductor pipe 21, a first DC power supply 22 that supplies DC power to the first conductor pipe 21, and a first control device that controls the first DC power supply 22. 23.

The helical first conductor tube 21 is made of stainless steel or nickel-based alloy. The first conductor pipe 21 is wound a predetermined number of times, and is configured such that the introduction port P1 for introducing water is positioned on the lower side and the outlet port P2 for discharging steam is positioned on the upper side. ing. Here, a flow control valve 7 for adjusting the water supplied to the first conductor pipe 21 is provided at or near the introduction port P1.

Further, in the first conductor pipe 21, an electrode 8a for supplying direct-current power is provided at a portion downstream of the flow control valve 7 and at the spiral winding start portion of the first conductor pipe 21. As shown in FIG. An electrode 8b for supplying DC power is provided at the winding end portion of the spiral of the first conductor tube 21 . One end of the first connection pipe 5 is connected to the lead-out port P2 of the first conductor pipe 21 , and the other end of the first connection pipe 5 is connected to the air-water separator 4 .

Further, the first control device 23 energizes and heats the first conductor tube 21 by constant power control based on latent heat of vaporization for obtaining a desired amount of steam. Specifically, the first control device 23 includes a power regulator 231 that adjusts the supplied DC power, a power measurement unit 232 that measures the supplied DC power, and a power measured by the power measurement unit 232 and a predetermined constant power. and a first control unit 233 that compares the power and controls the power regulator 231 . In this embodiment, the constant power control based on the latent heat of vaporization is performed in consideration of the sensible heat of the water, the heat radiation of the conductor pipe, etc. in addition to the latent heat of vaporization of the water. The power regulator 231 may use a semiconductor element (such as a transistor or a thyristor), or may use a non-semiconductor element such as a magnet relay. Also, the power measuring unit 232 can be configured with a voltmeter and an ammeter. Also, the predetermined constant power is set based on the latent heat of vaporization for obtaining the desired amount of water vapor.

<3. Superheated steam generator 3>
The superheated steam generator 3 generates superheated steam from steam by energizing and heating the spiral second conductor pipe 31 .

Specifically, the superheated steam generating unit 3 includes a spiral second conductor pipe 31, a second DC power supply 32 that supplies DC power to the second conductor pipe 31, and a second control that controls the second DC power supply 32 device 33;

The spiral second conductor tube 31 is made of stainless steel or nickel-based alloy. The second conductor pipe 31 is wound a predetermined number of times, and is configured such that the introduction port P3 for introducing steam is positioned on the upper side and the outlet port P4 for discharging superheated steam is positioned on the lower side. It is

Further, in the second conductor tube 31, an electrode 9a for supplying DC power is provided at the spiral winding start portion. Further, an electrode 9b for supplying DC power is provided at the winding end portion of the spiral of the second conductor tube 31 . One end of the second connection pipe 6 is connected to the introduction port P3 of the second conductor pipe 31 , and the other end of the second connection pipe 6 is connected to the air-water separator 4 .

Furthermore, the second control device 33 energizes and heats the second conductor pipe 31 by temperature control for achieving a desired superheated steam temperature. Specifically, the second control device 33 includes a power regulator 331 that regulates the supplied DC power, a thermometer 332 such as a thermocouple that measures the temperature of the generated superheated steam, and the temperature measured by the thermometer 332 and a second control unit 333 that controls the power regulator 331 by comparing the temperature with a predetermined set temperature. The power regulator 331 may use a semiconductor element (such as a transistor or a thyristor), or may use a non-semiconductor element such as a magnet relay. Also, the thermometer 332 is provided by being inserted through a branch pipe 311 (see FIG. 1) branched from the second conductor pipe 31 .

<4. Arrangement mode of each part>
In the above superheated steam generator 100, the first conductor pipe 21 and the second conductor pipe 31 are arranged concentrically with each other as shown in FIGS. , inside the first conductor tube 21 or the second conductor tube 31 . In this embodiment, the air-water separator 4 has a cylindrical container that separates air and water, and is arranged concentrically with respect to the first conductor pipe 21 and the second conductor pipe 31 .

Specifically, the first conductor pipe 21 is arranged below and apart from the second conductor pipe 31 (see FIG. 1), and the air-water separation section 4 includes the first conductor pipe 21 and the second conductor pipe 31. It is arranged inside the conductor tube 31 and away from the respective conductor tubes 21, 31 (see FIGS. 3 and 4). Also, the first connection pipe 5 connected to the outlet port P2 of the first conductor pipe 21 is connected to the air-water separator 4 between the first conductor pipe 21 and the second conductor pipe 31 (see FIG. 1). ). Furthermore, the second connection pipe 6 connected to the introduction port P3 of the second conductor pipe 31 is connected to the upper portion of the steam separation section 4 (see FIG. 1). A drain discharge section 10 for discharging the drain water separated by the air-water separation section 4 to the outside is connected to the bottom of the air-water separation section 4 .

In addition, as shown in FIGS. 1, 3 and 4, the electrodes 8a and 8b connected to the first conductor tube 21 are connected to extend vertically (axially) with respect to the first conductor tube 21. ing. Further, the electrodes 9a and 9b connected to the second conductor pipe 31 are connected so as to extend vertically (axially) with respect to the second conductor pipe 31 . With this configuration, the installation space of the superheated steam generator 100 can be made smaller than when the electrodes 8a, 8b, 9a, and 9b are extended sideways.

<5. Operation of superheated steam generator 100>
Next, the operation of the superheated steam generator 100 will be briefly described.

First, a predetermined amount of water is supplied to the first conductor pipe 21 by opening the flow control valve 7 . Further, the first control device 23 of the steam generator 2 controls the power regulator 231 to energize and heat the first conductor tube 21 by constant power control based on latent heat of vaporization for obtaining a desired amount of steam. Simultaneously with the electric heating of the first conductor pipe 21 by the steam generator 2 , the superheated steam generator 3 starts the electric heating of the second conductor pipe 31 .

The steam generated by the first conductor pipe 21 of the steam generator 2 flows through the first connection pipe and is introduced into the steam separator 4 . Steam and water are separated in this steam-water separator 4 . Drain water separated by the air-water separation unit 4 is discharged to the outside through the drain discharge unit 10 .

The steam (dry steam) from which water is separated in the steam-water separator 4 flows through the second connection pipe 6 and is introduced into the second conductor pipe 31 of the superheated steam generator 3 . Here, the second control device 33 of the superheated steam generator 3 controls the electric power regulator 331 to electrically heat the second conductor pipe 31 by temperature control for achieving a desired superheated steam temperature. As a result, a desired amount of superheated steam at a desired temperature is discharged from the outlet port P4 of the second conductor pipe 31 .

<6. Effect of the present embodiment>
According to the superheated steam generator 100 configured in this way, the first spiral conductor pipe 21 and the second spiral conductor pipe 31 are electrically heated to generate superheated steam, so the primary coil and iron core in the transformer system are unnecessary. can be Thereby, the number of parts of the superheated steam generator 100 can be reduced, and the device configuration can be simplified. In addition, since the primary coil and the iron core are unnecessary, the superheated steam generator 100 can be downsized, and the installation space can be reduced. In addition, manufacturing costs can be reduced, and the weight of the device can be reduced.

Particularly in this embodiment, the first conductor pipe 21 and the second conductor pipe 31 are arranged concentrically with each other, and the air-water separator 4 is arranged inside the first conductor pipe 21 or the second conductor pipe 31. Therefore, the superheated steam generator 100 can be further miniaturized, and the installation space can be reduced.

In addition, by arranging the air-water separation part 4 inside both the first conductor pipe 21 and the second conductor pipe 31, the capacity of the air-water separation part 4 can be maximized while downsizing the superheated steam generator 100. , and can reliably separate water with a compact configuration.

Furthermore, by heating the first conductor pipe 21 and the second conductor pipe 31 by means of the DC power sources 22 and 32, even if the air-water separator 4 is made of a magnetic material, it may be induction-heated. There is no Thereby, the space inside the first conductor pipe 21 or the second conductor pipe 31 can be effectively used, and the superheated steam generator 100 can be miniaturized.

<7. Other modified embodiments>
For example, in the above-described embodiment, the first conductor pipe 21 and the second conductor pipe 31 may be arranged concentrically instead of vertically arranging the first conductor pipe 21 and the second conductor pipe 31 . For example, the first conductor tube 21 may be arranged outside and the second conductor tube 31 may be arranged inside, or vice versa.

In addition, although the air-water separator 4 of the above embodiment is arranged inside both the first conductor pipe 21 and the second conductor pipe 31, either the first conductor pipe 21 or the second conductor pipe 31 is may be arranged inside.

In addition, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications are possible without departing from the spirit of the present invention.

REFERENCE SIGNS LIST 100... Superheated steam generator 2... Steam generator 21... First conductor tube 22... First DC power supply 3... Superheated steam generator 31... Second conductor tube 32...・Second DC power supply 4 ... Air-water separation unit 5 ... First flow path pipe 6 ... Second flow path pipe 7 ... Flow rate adjustment valve 10 ... Drain discharge part

Claims (6)

a steam generator that energizes and heats the spiral first conductor pipe to generate steam from water;
a superheated steam generator that energizes and heats the spiral second conductor pipe to generate superheated steam from steam;
and a steam-water separation unit that separates water from steam,
The first conductor tube and the second conductor tube are arranged concentrically with each other,
The superheated steam generator, wherein the steam separator is arranged inside the first conductor pipe or the second conductor pipe. The first conductor tube is arranged below the second conductor tube,
The superheated steam generator according to claim 1, wherein the steam separator is arranged inside the first conductor pipe and the second conductor pipe. The water vapor generator has a first DC power supply that supplies DC power to the first conductor pipe,
The superheated steam generator according to claim 1 or 2, wherein the superheated steam generator has a second DC power supply that supplies DC power to the second conductor pipe. The water vapor generation unit electrically heats the first conductor tube by constant power control based on latent heat of vaporization for obtaining a desired amount of water vapor,
The superheated steam generator according to any one of claims 1 to 3, wherein the superheated steam generator electrically heats the second conductor pipe by temperature control for achieving a desired superheated steam temperature. . The superheated steam generator according to any one of claims 1 to 4, further comprising a flow rate adjustment valve that adjusts the amount of water supplied to the first conductor pipe. The superheated steam generator according to any one of claims 1 to 5, wherein the first conductor pipe and the second conductor pipe are made of stainless steel or a nickel-based alloy.

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