JPS6042850B2 - High pressure gas heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for heating high pressure gas to a temperature of 850° C. or higher.

In detail, the gas pressurized outside this device is
This invention relates to a device that generates a desired high-temperature, high-pressure gas by heating it to a temperature above ℃. The futuristic nuclear reactor ``high-pressure gas reactor,'' which does not currently exist in Japan, but whose development and research is already underway in the United States, is expected to be introduced to Japan someday.

The helium gas used as a coolant in this high-pressure gas furnace is assumed to be heated and pressurized to a temperature of 100°C) 9/cltG, so we experimentally created helium gas at such high temperature and pressure. There is an urgent need to study its physical properties and behavior. However, it was not possible to produce such high-temperature, high-pressure gas using conventional equipment such as electric furnaces. In other words, 50 to 9
Due to the material of the container, it was impossible to fill and store the high pressure gas of /aiG at a temperature of 850° C. or higher.
In the present invention, when high-pressure gas pressurized to a desired pressure outside the shell is injected into a pressure shell that can withstand a predetermined pressure and heated to a desired high temperature inside the shell, the heating is not conducted to the pressure shell wall. This insulation made it possible to obtain high-temperature, high-pressure gas.

That is, in the present invention, the inside of a pressure cylinder having a cooling jacket on the outer periphery is divided into a heating part chamber and a heating part chamber by a heat insulating board capable of increasing the pressure, and the heating part chamber has a heating part fixedly installed across the upper space. A plurality of heat generating elements are suspended and fixed to the supporting plate, passing through the heat insulating board and the supporting plate, and a first heat insulating layer is fixed to cover the inner wall of the pressure cylinder, and the heat insulating layer and the heat generating element are A second heat insulating layer is provided between the heat insulating layer and the heat insulating layer through a circulation space through which gas injected from the gas inlet from outside the body passes, and a flow space between the heat insulating panel and the heat generating body group. The heating chamber is fixedly installed to form a heating chamber, and the heating chamber is provided with a gas discharge port through which the heated gas is taken out of the shell, and the cooling chamber has an electrode inserted from outside the shell. A high-pressure gas heating device characterized by having a cooler connected to the end of the heating element group and cooling the cooling section chamber with a cooling medium from outside the body. This makes it possible to increase the temperature regardless of the pressure of the gas.
The present invention will be explained in detail below with reference to the drawings.

FIG. 1 shows a longitudinal cross-sectional view of the device of the invention, and FIG.
It is an AA sectional view of the figure. One end of the pressure cylinder 3 is connected to the lid 1.
6, and the other side has a gas inlet 17 and an outlet 1.
8 is opened, and a jacket 1 is attached to the outer periphery to form a cooling water chamber 2. The inside of the fuselage is horizontally partitioned by a partition plate 19 provided with a plurality of pressure equalizing holes 19 1, 19 2, . It is divided into a heating section chamber 5 and a cooling section chamber 6. In the heating section chamber 5, a plurality of heating elements 8 (1 of 8,
8-2...8-18) are suspended through the heat insulation board 4 and the support plate 7.

A first heat insulating layer 9 is fixed to the inner wall of the pressure cylinder 3 so as to cover the inner wall surface, and a second heat insulating layer 10 is interposed and fixed between the heating element 8 and the first heat insulating layer 9. There is. A space 11 where gas flows between the first heat insulating layer 9 and the second heat insulating layer 10, a flow space 12 between the second heat insulating layer 10 and the heat insulating board 4, a space between the heating element 8 and the second heat insulating layer. A heating chamber 13 is formed between the layer 10. The heat insulating board 4, the heat insulating layer 9, and the heat insulating layer 10 all use ceramic-based heat insulating materials. Specifically, the ceramic-based heat insulating materials include silica-alumina-based heat insulating materials called ceramic fibers, for example"
Zirconia 99, also known as ``KAOWOOL'' (product name, Nippon Asbestos Co., Ltd. product) and zirconia fiber.
% or more of insulation material, e.g. For example, [ZIRCAR] (product name,
ZIRC, ARPRODUCTI Inc. Product) Other commercially available fibrous or cotton-like ceramic heat insulating agents may be appropriately selected and used.

The insulation board 4 forms a ceiling that partitions the top of the heating chamber. Therefore, the fibrous or cotton-like ceramic insulation materials mentioned above can be bundled or braided to form sheets and then laminated, or the cotton-like materials can be formed as appropriate, and the surrounding area can be covered with wire mesh or metal. By covering it with a perforated plate, gas can freely flow inside, but heat radiation can be blocked, and the insulation board 4 itself is constructed so that it does not lose its shape. 7 to use.

As mentioned above, the heat insulating board 4 has a structure that allows gas to freely flow inside and equalizes the pressure so that no pressure difference occurs between the heating section chamber 5 and the cooling section chamber 6. This pressure-equalizing structure can be created by making holes in a braided sheet of cotton-like insulation, but it is also possible to make holes in a sheet made of braided cotton-like insulation.
They may be formed into a laminated sheet that allows gas to flow as appropriate, such as by stacking them in a radial or irregular manner. A partition plate 19 can be placed under the heat insulation board 4 to support the heat insulation board. The partition plate 19 may have any structure as long as it allows gas to flow between the heating section chamber 5 and the cooling section chamber 6 to equalize the pressure. In the figure, a partition plate 19 in which a plurality of pressure equalizing holes 19 are appropriately provided is shown, but a spider web consisting of a lattice plate, a honeycomb plate, a concentric circle, or a combination of spiral cane girders and radial girders is shown. It may also be a shaped plate. However, partition plate 1
It is not preferable to have a hole that directly connects the upper and lower layers of the layer 9 and the heat insulating board 4 from the viewpoint of radiant heat, and care must be taken to allow the gas to pass through the gap by bending. On the other hand, a first heat insulating layer 9 is placed on the inner wall of the pressure cylinder 3, and a second heat insulating layer 10 is placed on the inner wall of the pressure cylinder 3.
The purpose of heat insulation is to interpose and fix the heat generating element 8 and the first heat insulating layer 9 between the heating element 8 and the first heat insulating layer 9. The structure is similar to that of a heat-insulating board, such as using a sheet-like material made of braided materials, or molding a cotton-like material as appropriate and covering it with a wire mesh.

When installing the heat insulating layer, it is necessary to use anchors to secure it appropriately so that it does not separate from the wall. Note that the same type of ceramic heat insulating material may be used as the material for the heat insulating board and the heat insulating layer, or different types of ceramic heat insulating materials may be appropriately combined as necessary.

In the cooling section chamber 6, an electrode 14 inserted from outside the body is connected to the tip of a heating element 8 protruding from the heat insulation board 4, and a coil-shaped cooler 15 through which cooling water is circulated is suspended and fixed. There is.

To use the device of the present invention, the heating chamber 13 is heated to a predetermined temperature by the heating element that is energized through the electrode 14, and during this time the target gas pressurized to the required pressure is pumped out of the pressure-resistant body. , is injected into the shell from the gas inlet 17.

The injected gas passes through the circulation spaces 11 and 12 and flows into a heating chamber 13 having eight groups of heating elements. Since the heating chamber 13 is heated by the heating element 8, the gas is heated to a predetermined temperature and discharged from the gas outlet 18. The discharged gas is obtained as a gas at the desired pressure and temperature. During that process, the pressurized gas flows through the pressure equalizing holes 19 and 19.
2...Since it also penetrates into the cooling section chamber 6 through the n of 19 and the insulation board 4, the pressures in the heating section chamber 5 and the cooling section chamber 6 become equal, and the pressure applied to the entire pressure shell 3 is the same. Therefore, a predetermined withstand voltage is possible. Further, although the heating chamber 13 is heated to a predetermined temperature by the heating element 8, the second heat insulating layer 10 and the first heat insulating layer 9
Heat conduction to the wall is blocked, and the heat is removed by the low-temperature injection gas flowing through the circulation space between the two heat insulating layers, and the cooling water flowing through the cooling water chamber 2 is transferred to the wall of the pressure shell 3. is also cooled from the outside, so that the walls of the pressure cylinder 3 are not damaged by overheating. In addition, the cooling section chamber 6 is configured such that heat conduction from the heating element 8 is blocked by the heat insulating board 4, and the cooler 15
The temperature of the cooling section chamber 6 is maintained at a low temperature.
That is, by using the device of the present invention, the heating chamber 13 is heated to a high temperature without causing damage to the fuselage by the heating element 8.
The injected high pressure gas can be continuously heated to the desired high temperature. EXAMPLE The specifications of each part of the apparatus shown in FIG. 1 are as follows, and helium gas was heated using this apparatus.

Pressure cylinder 3 material: SUS3O4 stainless steel Wall thickness: 227m Inner diameter: 550Im Height: 3.6rr1 Jacket 1 Material: ●●...・・SUS3O4 stainless steel wall thickness・・
...5Tf0n Inner diameter...67CM Cooling water chamber 2 Width...38wm Heating element 8 Kanthal A1 heater 1 & main length...1.5rrL, 1st Insulation layer 9 KA0●WOOL insulation material thickness...5077!77! Second heat insulating layer 10 KA0-WOOL Insulating material thickness...9' Distribution space 11 Width...10Wrfn Heating chamber 13 Diameter...2507 m Insulation Panel 4 KA0●WOOL insulation material thickness...15Cynn Helium gas with a pressure of 50 kg/CliGl temperature of 550°C is supplied from the gas inlet 17 at a flow rate of 200 Nd/h,
A power of 38 kW was applied to the heating element 8 through the electrode 14, and the temperature inside the heating chamber was gradually raised to 1000° C. over 8 hours.

8 hours after the start of operation, the pressure from the gas outlet 18 is 50 kg/
Helium gas with a CFllGl temperature of 1000°C was continuously discharged.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing the structure of the device of the present invention, and the heating elements are simplified to two in order to clearly show them. FIG. 2 is a sectional view taken along the line AA in FIG. 1. The correspondence between the main parts illustrated and the symbols is as follows. 1... Cooling jacket, 2... Cooling water chamber, 3... Pressure resistant shell, 4... Heat insulation board, 5
... Heating section chamber, 6... Cooling section chamber, 7.
... Support plate, 8 ... Heating element, 9 ...
...First heat insulation layer, 10...Second heat insulation layer, 1
1, 12... Distribution space, 13... Heating chamber, 14... Electrode, 15... Cooler, 16...
...Lid, 17...Gas inlet, 18...
Gas outlet, 19... Partition plate.

Claims (1)

[Claims] 1 The inside of the pressure shell 3 having the cooling jacket 1 on the outer periphery is divided into a heating section chamber 5 and a cooling section chamber 6 by a heat insulating board 4 that can equalize the pressure.
In the heating section chamber 5, a plurality of heating elements 8 are mounted on a support plate 7 fixedly installed across the upper space.
A first heat insulating layer 9 is fixedly suspended through the support plate 7 and covers the inner wall of the pressure cylinder, and a second heat insulating layer is provided between the heat insulating layer 9 and the heating element group. 10 is a circulation space 11 through which gas injected from outside the shell passes through the gas inlet 17 between the heat insulating layer 9 and a circulation space 1 between the heat insulating panel 4;
2 to form a heating chamber 13 which is heated by a group of heating elements, and the heating chamber 13 is provided with a gas discharge port 18 through which heated gas is taken out to the outside of the body. 6
An electrode 14 inserted from outside the shell is connected to the end of the heating element group, and a cooler 15 is disposed for cooling the inside of the cooling section chamber 6 with a cooling medium from outside the shell. A high-pressure gas heating device characterized by: