JPS6014092A - Method of fixing gas introducing pipe made of metal to retort made of ceramic - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for fixing a metal gas introduction pipe to a ceramic retort.

More specifically, the present invention relates to a method for fixing a metal gas introduction pipe to a ceramic retort used in a fluidized bed heating furnace.

Fluidized bed heating furnaces have traditionally been used in various fields such as metal heat treatment, but since these conventional fluidized bed heating furnaces were equipped with metal O retorts, their heat resistance was limited to temperatures up to about 1100°C. Heating was limited, and there was concern about heating in a higher temperature zone.

Therefore, attempts have been made to install a ceramic retort in place of the metal retort to further increase its heat resistance. Difficulty fixing the pipe-N
There was a problem of knowing.

In other words, if a metal retort is installed in a conventional furnace, a metal gas introduction pipe could be welded to it, but if it is installed in a ceramic retort, this becomes difficult, so other appropriate methods must be used. It must be fixed using a suitable method, such as using adhesive or using bolts.

However, the method using adhesive has the disadvantage that sufficient adhesive strength cannot be obtained, and the method using bolts also requires drilling a plurality of mounting holes in the retort, which makes the retort difficult to install. However, even if these drawbacks are ignored and the ceramic retort is fixed, the difference in thermal expansion between the two may cause the crank to There was an unsolvable problem in that it had to be fixed in a way that could prevent pressure from occurring.

If the introduction pipe could be installed in a ceramic pipe, it would be easier to solve these five problems, but if the pipe does not have sufficient strength or the metal main pipe connected to the gas supply source This has the fatal drawback that it is difficult to process the connection screws, making it difficult to employ, and therefore a metal gas introduction pipe must be fixed.

The present invention was achieved as a result of paying attention to the problems of the conventional art as described above, and making extensive inquiries from various aspects in order to solve the problems.

That is, the present invention provides a method for fixing a metal gas introduction pipe to a ceramic retort used in a fluidized bed heating furnace, in which a heat-resistant Banking ″f
: A metal locking body is fixed to one end on the gas ejection side of the introduction pipe that penetrates and protrudes into the retort, and the other end on the gas supply side of the introduction pipe is exposed to the outside of the retort. A parallel metal key is fixed to the part, and a jacket part is formed on the outer peripheral surface of the other end on the gas supply side of the introduction pipe, and the pipe is movable in the extending direction of the introduction pipe guided by the key. A metal outer cylindrical body is attached as shown in FIG. It is characterized by being pressed into contact with the ζ king.

Hereinafter, to explain more specifically based on examples, the first
In the figure, (1) is a cylindrical container-shaped ceramic retort, (2) is a gas dispersion device installed in this retort (1), and (3) is fixed to the bottom wall (1a) of the retort (1). (4) is an electric heater,
(5) and (6) are heat insulating materials, (7) and (8) are fire bricks, and the introduction pipe (3) is fixed as shown in an enlarged view in FIG. In the figure, (9) is the bottom wall (1
00 is a heat-resistant backing made of carbon graphite inserted into this hole (9), +111 is the above-mentioned, ], ) A metal locking plate for preventing removal, 02) welded to one end (5) on the gas ejection side of the introduction pipe (3) that protrudes into the inside of the retort (1). A metal parallel key (13) fixed to the exposed other end (B)' on the gas supply side of the introduction pipe (3) has a jacket part α4 on the outer peripheral surface of the end (B+). while being guided by the key 02) to the introduction tube (4).
), the metal outer cylinder is fitted with a heat-resistant sheet backing, and the end part (
By abutting the metal pressing nut 06) screwed onto the inlet pipe B) against one end of the outer cylindrical body (13), the other end thereof is brought into pressure contact with the banking 01, and the introduction pipe ( 3) is fixed. Note that (1η is a metal lock nut, which is the above-mentioned pressing mechanism). f+61 is locked so that it does not rotate freely.

In the present invention, the ceramic retort (1
) The metal gas introduction pipe (3) can be fixed by simply providing one tapered through hole (9) in the bottom wall (1a) of the retort (1), thereby preventing significant deterioration of the strength of the retort (1). In addition to being able to prevent gas leakage, it is also possible to completely seal the gas.

In addition, during the treatment, the fluidizing gas is passed through the hole (18) bored in the gas ejection side end (A) of the introduction pipe (3) to the pressure chamber (j9) formed under the gas dispersion device (2). The alumina particles are introduced into the processing chamber 00), uniformly dispersed by this device (2), and flowed into the processing chamber 00), where the alumina particles filled therein are fluidized to form a so-called fluidized bed. At the same time, the fluidized bed is heated by an electric heater (4), and the object to be processed is immersed in this bed.

During this process, the gas introduction pipe (3) is also gradually heated, but in the present invention, the outer cylinder (13) is attached to form the jacket side. , (17) can also be prevented. That is, by attaching the outer cylindrical body 03), the nano h (16), (17) can be screwed on, and the jacket part 04 can prevent excessive heat conduction and prevent seizure from occurring.

Further, in the present invention, the outer cylinder (13) is mounted so that it can move in the direction in which the gas introduction pipe (3) extends but cannot rotate.
When it is pushed into f9+, it can be pushed in without damaging its sealing surface, and a good gas seal can be achieved.

In the present invention, pressurized air may be supplied to the jacket portion (14) to forcibly cool the jacket portion (14). Holes may be bored or fins may be provided.

Further, the gas introduction pipe (3) may be fixed to the lower part of the circumferential wall of the retort (1) (section C shown in FIG. 2).

As described above, according to the present invention, a method can be obtained that allows a metal gas introduction pipe to be firmly fixed to a ceramic retort used in a fluidized bed heating furnace.

Note that 21+ in Figure 2 is a metal support.
This includes the porous ceramic plate (2a) of the gas dispersion device (2), which is welded to the gas injection side tip of the gas introduction pipe (3) and fixed to the retort (1) with a heat-resistant adhesive. It supports a heat-resistant non-woven filter placed on the bottom side. @ is a metal gas supply source pipe connected to the gas introduction pipe (3) via a pipe joint.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a fluidized bed heating furnace, and FIG. 2 is a longitudinal sectional view showing how a metal gas introduction pipe is fixed to a ceramic retort. (1): Ceramic retort, (3) Bimetallic gas introduction tube, (la): Bottom wall of ceramic retort, (9): Tapered through hole, θ0: Heat resistant taper) Z-cking, 1ll): Extraction Metal locking plate for stopping, 02): Metal parallel key, (13): Metal outer cylinder, +14):
Jacket part, Q6+: Metal push-down nut, (5): One end on the gas ejection side, tB): Other end on the gas supply side, (C) Lower part of the two-layer side wall. a+ jl+,,,jJJ foil W, 1 j is: Shimukoichi: 4+! 3-+! G+1. ＋／）! Jlh-yozu\3knee4'l

Claims (1)

[Claims] (1) A method for fixing a metal gas introduction pipe to a ceramic retort used in a fluidized bed heating furnace, in which a heat-resistant banking is inserted into a tapered through hole provided in the bottom wall or lower part of the peripheral side wall of the retort. A metal locking body is fixed to one end on the gas ejection side of the introduction pipe that penetrates and projects into the retort, and the other end on the gas supply side of the introduction pipe is exposed to the outside of the retort. A parallel metal key is fixed to the inlet pipe, and a jacket portion is formed on the outer peripheral surface of the other end on the gas supply side of the inlet pipe, so that the inlet pipe can be guided by the key and moved in the extending direction of the inlet pipe. A metal outer cylindrical body is attached to the backing, and a metal pressing cut screwed onto the other end of the gas supply side of the introduction pipe is brought into contact with one end of the outer cylindrical body, and the opposite end thereof is attached to the backing. A method for fixing a metal gas introduction pipe to a ceramic retort, characterized in that the metal gas introduction pipe is brought into pressure contact with the ceramic retort.・5