JPH09119781A - Hot repair thermal insulation apparatus for industrial kiln - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily convey from a small opening, to simply open it and to provide the excellent heat insulation effect by disposing the silicone coating surface of fire resistant fiber woven fabric at the inside, sewing a bag, and supplying the air to the bag to expand the bag as a heat shield wall. SOLUTION: The heat shield wall of a hot repair thermal insulation apparatus of an industrial kiln is formed in a bag state by coating the one side surface of fire resistant fiber woven fabric 61 with silicone resin 62, disposing the coating surface at the inside, and sewing the peripheries to a bag state. When the air is supplied into the bag to expand the bag, it can be used as a heat shield wall. The resin 62 of the inner surface suppresses the leakage of the air from the interstices of the fabric 61 to be useful for expanding the bag. In the case of repairing or inspecting the important position, when the apparatus is used, the space necessary for working in the kiln can be secured without stopping the entire kiln, the time of recovering the operating temperature by reheating the kiln is shortened to reduce the operating loss, thereby making it possible to reduce the energy for again superheating it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial kiln including a flue, particularly preferably an oval-shaped industrial kiln, for repairing and inspecting the kiln without lowering the temperature in the kiln. The present invention relates to a heat insulating device for securing a work area.

[0002]

2. Description of the Related Art A heating furnace, a soaking furnace, a heat treatment furnace and thermal equipment such as a flue (hereinafter referred to as a kiln) installed in various industrial fields including the steel industry (hereinafter referred to as a kiln) have a fixed fire resistance as a heat insulating material. Insulating materials such as materials, amorphous refractories or ceramic fibers are lined inside the furnace and inside the flue. However, these heat insulating materials cannot prevent partial damage during use with any of the lining materials.

[0003] Conventionally, when repairing a damaged portion of a heat insulating material of a kiln or inspecting an important part, heating of the kiln is stopped and the temperature of the entire furnace is adjusted to a temperature at which an operator can work in the furnace. After cooling down and completing the repair and inspection of the kiln,
A so-called cold repair was carried out, in which the furnace was reheated to the operating temperature.

The above-mentioned method for repairing or inspecting a kiln has the following problems because the furnace is stopped for repairing or inspecting and the temperature inside the furnace is lowered to a temperature at which the worker can work. . (1). Reducing the temperature of the entire furnace releases the heat stored in the operating furnace, and reheating it is a huge energy loss. (2). It takes a long time to cool the entire inside of the furnace and heat it to the operating temperature again after the completion of the repair or inspection, and the operating loss during this period is large. (3). The materials that make up the kiln are subject to large thermal expansion and contraction stresses due to the temperature difference between the operating temperature and the temperature at which workers can work, so the life of the materials that make up the kiln were to be shortened. .

As a method for solving the above-mentioned drawbacks, a method of repairing or inspecting with a heat insulating plate and shutting off the repairing or inspecting area and hot repairing or inspecting other portions, for example, hot-air stove outlet pipe section or furnace wall Is provided with a heat shield plate in the horizontal direction of the combustion chamber, and a dome brick and a temporary combustion burner for protecting the heat storage chamber brick are arranged in the combustion chamber upper combustion chamber, while the heat shield plate lower combustion chamber is forcibly forced. A method of cooling and hot-loading the ceramic burner (JP-A-52-29404),
There has been proposed a hot-air stove heat-insulating device (Japanese Patent Publication No. 54-26964), which comprises a heat-insulating plate having an opening in the center and a support mechanism that supports the heat-insulating plate so as to be vertically movable.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the method disclosed in Japanese Patent Publication No. 404 and Japanese Patent Publication No. 54-26494, the repair portion is cut off from the repair portion and the non-repair portion by a heat insulating plate, and the non-repair portion is provided with a temporary combustion burner to heat the repair portion. Although it is forcibly cooled to perform hot repair, it has a drawback that not only it takes time until the heat shield plate is installed, but also a considerably large opening is required to carry in the heat shield plate.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a heat insulating device which can be easily carried in through a small opening and can be easily opened and which has an excellent heat insulating effect.

[0008]

Means for Solving the Problems The present inventors have conducted various tests and studies to achieve the above object. As a result, a fireproof fiber woven fabric coated with silicone resin on one side can be folded into a small size by sewn into a bag with the silicone resin side facing inward. It has been clarified that the carry-in hole of can be suppressed to the necessary minimum, and that after the bag is carried into the furnace, air is supplied to the bag to inflate it, and the area requiring repair or inspection can be blocked from the heat in the furnace. This invention was reached.

That is, the invention of claim 1 of the present application is to sew a fireproof fiber woven cloth coated with a silicone resin on one side into a bag with the surfaces coated with the silicone resin being on the inner side, and blow air into the bag to inflate it and heat it. A heat shield device for hot repair of an industrial kiln, which is characterized by using a shielding wall.

The invention of claim 2 of the present application is characterized in that two or more refractory fiber woven fabrics coated with silicone resin on one side are stacked and sewn into a bag, and hot repair of the industrial kiln according to claim 1 is performed. It is a heat insulating device.

The invention according to claim 3 of the present application is characterized in that a fireproof fiber woven fabric and a fireproof fiber woven fabric coated with a silicone resin on one side are overlapped and sewn into a bag. It is a heat protection device for hot repair.

The invention according to claim 4 of the present application is characterized in that, when the bag is sewn, it is sewn in a lattice shape or a spiral shape to form a continuous pouch assembly. This is a heat protection device for hot repair of industrial kiln.

The invention according to claim 5 of the present application is characterized in that an air supply port for supplying air is connected to the sewn bag, and the heat insulating device for hot repair of the industrial kiln according to claim 1 to claim 4. Is.

The invention according to claim 6 of the present application is characterized in that an air supply port for supplying air to the sewn bag and an air discharge port for discharging the air filled in the bag are connected. It is a heat insulating device for hot repair of the industrial kiln according to 4.

[0015]

DETAILED DESCRIPTION OF THE INVENTION The details of the present invention will be described below with reference to FIG. FIG. 6 (a) is a sectional view of a heat shield structure sewn into a bag according to claim 1, and FIG. 6 (b) is a fire resistant fiber woven fabric coated with silicone resin on one side according to claim 2 A cross-sectional view of the state, (c) is a cross-sectional view of the fire-resistant fiber woven fabric of claim 3 and a fire-resistant fiber woven fabric coated with a silicone resin on one side, and (d) is the bag of claim 4. FIG. 6 is a cross-sectional view of a state in which a pouch aggregate that is sewn in a lattice shape or a spiral shape and is in communication with each other is formed at the time of sewing.

In FIG. 6 (a), reference numeral 61 is a fireproof fiber woven cloth, and 62 is a silicone resin applied on one side of the fireproof fiber woven cloth 61. The bag is made into a bag shape and can be used as a heat shield wall by blowing air into the bag to inflate it. The silicone resin 62 provided on the inner surface side suppresses air leakage from the weave of the fireproof fiber woven fabric 61 and helps to inflate the bag.

In FIG. 6 (b), two pieces of fire-resistant fiber woven fabric 61 coated with a silicone resin 62 on one side are superposed, and the silicone resin-coated surfaces are the inner surfaces of each other, and The periphery is sewn into a bag shape, and by using two or more upper and lower layers, it is possible to further suppress air leakage from the weave of the refractory fiber woven fabric 61.

In FIG. 6 (c), a fireproof fiber woven fabric 61 and a fireproof fiber woven fabric 61 coated with a silicone resin 62 on one side are superposed on each other, with the silicone resin coated surfaces being the inner surfaces of each other. By sewing the upper and lower bases into a bag shape, the contacting high-heat wall surface exerts an effect when the temperature is higher, preventing the bag from being burnt and preventing air from the weave of the fire-resistant fiber woven fabric 61. It is possible to further suppress the leakage.

In FIG. 6 (d), when the refractory fiber woven fabric 61 coated with the silicone resin 62 on one side is sewn into a bag shape with the silicone resin coated surfaces facing each other on the inner side, A large bag-like bag is sewn in a lattice shape or a spiral shape to form an assembly of communicating cylindrical bags 63, which becomes a spherical shape when inflated with air, and a flat surface is used even when an inconvenient wide area is shielded. It becomes possible to shield it.

The above heat shield structure is inserted into the furnace through a furnace wall insertion hole which is folded to a small size and has a minimum number of holes, and compressed air is introduced to inflate it to shut off a predetermined region from the temperature inside the furnace. can do. The repair or inspection area space thus secured can be put into a workable state by blowing in cool air.

In the present invention, the silicone resin applied to one side of the refractory fiber woven cloth is usually burnt at 200 to 250 ° C., so that a part of the air introduced into the bag is allowed to flow out to allow the air to flow in the bag. The temperature inside the bag to 200
If the temperature is maintained at not higher than 0 ° C, the silicone resin applied to the inner surface of the bag can be prevented from burning out. It should be noted that this device does not need to be provided with an air outlet when it is considered that the air introduced into the bag leaks a lot, depending on the size and the like.

As the fire resistant fiber woven fabric used in the present invention, a ceramic fiber woven fabric composed of one or more components such as silica, alumina, magnesia, rock wool woven fabric, slag wool woven fabric and the like can be used. .

The heat shield structure of the present invention limits the area of the industrial kiln requiring repair or inspection, and can temporarily block the heat from the furnace to secure a working environment. Thermal damage to the furnace material in other parts can be minimized, and the shutdown period for repairs and inspections can be minimized. The life can be extended.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the heat insulating device of the present invention will be described below with reference to FIGS. FIG. 1 is a front view of an opened state of a heat insulating dome of the heat insulating device of the present invention, and FIG.
1 is a cross-sectional view taken along the line AA of FIG. 1 and shows a donut ring portion of the outer peripheral portion of the heat insulating dome. (A) is a sectional view before the outer peripheral portion is expanded, (b) is a sectional view after the outer peripheral portion is expanded, FIG. 3 shows B of FIG.
FIG. 4B is a cross-sectional view showing a heat insulating dome, wherein (a) is a cross sectional view before expansion, (b) is a cross sectional view after expansion, and FIGS. 4 and 5 show the heat insulating dome of the present invention for a coke oven. FIG. 5 is a perspective view showing a state before use, in which the damper chamber of the flue gas and a condition used when repairing the damper are shown. FIG.
Shows the situation where the heat insulating dome was carried into the upstream side of the flue damper chamber where it was repaired, and the heat insulating dome was expanded and installed by blowing air. (A) is a vertical cross section of the flue and (b) is It is a flue horizontal sectional view.

In FIGS. 1 to 5, reference numeral 1 denotes a foldable heat insulating dome, the surface of which is sewn so as to form an aggregate of columnar bags when inflated. For the heat insulating dome 1, both the upper surface cloth 2 and the lower surface cloth 3 are made of silica woven cloth coated with the silicone resin 4 on the inner surface, and the dome outer peripheral portion 5 is made of silica woven cloth 6 coated with the silicone resin 4 on the inner surface. ing. To sew the heat insulating dome 1, a thread 7 made of heat insulating fibers is used, a ceramic fiber woven cloth 8 is sewn to the upper surface cloth 2 and the outer peripheral portion 5, and a ceramic tape 9 is attached to the sewn portion to obtain a heat insulating effect. And the life of the stitching part is extended. The air introduction portion into the columnar bag of the heat insulating dome 1 is introduced from the air introduction port 10 by blowing air,
The outer peripheral portion 5 and each chamber of the inner surface portion are structured to communicate with each other through a ventilation hole 11. Reference numeral 12 is an exhaust valve for circulating the air in the heat insulating dome 1. Reference numeral 13 is a support rod for carrying the heat insulating dome 1 into the flue furnace.

Using the heat insulating dome 1 described above, a damper 14 for adjusting the internal pressure of the coke oven collective flue and a brick 1 for the damper chamber are used.
When repairing No. 5, after stopping the combustion of the coke oven, the manhole 16 of the collecting flue is opened, the heat insulating dome 1 is folded and attached to one end of the support rod 13, and the balance weight 17 is attached to the other end. Balance and then use a hoist or the like to carry the heat insulating dome 1 into the collective flue through the manhole 16 of the collective flue. After that, the support rod 13 of the heat insulating dome 1 is set at a predetermined position, and then air is supplied from an air hose connected to the air inlet 10 to blow air to the outer peripheral portion 5 of the heat insulating dome 1. Ventilation hole 11
From the above, air flows into each chamber of the inner surface portion, the heat insulating dome 1 swells, and the outer peripheral portion 5 is brought into close contact with the brick wall 18, thereby blocking the upstream side and the downstream side of the stack flue. Further, in order to prevent the silicone resin 4 applied on the inner surface of the heat insulating dome 1 from being burnt out, the exhaust valve 12 is opened to have a constant flow velocity.

As a result, the upstream side chamber 19 and the downstream side furnace internal pressure adjusting damper chamber 20 of the stack flue are completely thermally isolated. Next, the outside air is blown to the downstream side by the cooling fan from the manhole 16 of the flue gas and is exhausted from the chimney 21 to forcibly cool the in-furnace pressure adjusting damper chamber 20. After the forced cooling is completed, the internal pressure adjustment damper 1
4 and damper room bricks 15 are repaired.

When the repair of the furnace pressure adjusting damper 14 and the damper chamber brick 15 is completed, the air in the heat insulating dome 1 is discharged after the air supply to the heat insulating dome 1 is stopped, and the dome support rod 13 is rotated. After the heat insulation dome 1 is wound around the dome support rod 13, the heat insulation dome 1 and the dome support rod 1
The whole 3 is carried out from the manhole 16. When the carry-out of the heat insulating dome 1 is completed, the manhole 16 is closed and the repair is completed. Although the inside of the manhole 16 is normally sealed with a refractory, the refractory of the manhole 16 is disassembled and opened only when the furnace pressure adjusting damper 14 and the damper chamber brick 15 are repaired. This open manhole 1
A heat shield device is loaded from 6 and the heat shield device is carried out when the furnace repair is completed, and then the inside of the manhole 16 is again sealed with a refractory material to return to the normal operating state.

[0029]

As described above, if the heat insulating device of the present invention is used, a space necessary for workers to work in the furnace can be provided without stopping the entire kiln for repair or inspection of important points. It is possible to secure the required time, reduce the time required to reheat the kiln and restore it to the operating temperature, reduce the operating loss, and minimize the heat release of the operating furnace. It can be suppressed, and the energy for reheating the kiln to the operating temperature can be reduced. Further, the heat insulating device of the present invention can be carried into the furnace through a small opening, can be easily widened in the furnace, and has a large heat insulating effect due to the heat insulation by the air layer, and can be taken out from the small opening. Easy to do. Furthermore, when the heat insulating device of the present invention is used, the range of stress of thermal expansion and contraction of the material forming the kiln is limited to the minimum of the repaired part, and the life of the furnace material forming the kiln is reduced. It can be extended.

[Brief description of the drawings]

FIG. 1 is a front view of an insulating dome of a heat insulating device of the present invention in an open state.

2 is a cross-sectional view taken along the line AA of FIG. 1 showing an outer peripheral portion of a heat insulating dome, FIG. 2 (a) is a sectional view before the outer peripheral portion is expanded, and FIG. .

3 is a cross-sectional view taken along the line BB of FIG. 1, showing a heat insulating dome, where (a) is a cross-sectional view before expansion and (b) is a cross-sectional view after expansion.

FIG. 4 is a perspective view showing a state before insertion, in which the heat insulating dome is folded into a small size and set in a carry-in device into the furnace.

FIG. 5 shows a state in which the heat insulating dome is expanded and installed upstream of the collective flue pressure adjusting damper chamber for repair, in which (a) is a vertical sectional view and (b) is a horizontal sectional view. Is.

FIG. 6 shows the structure of the heat insulating device of the present invention,
(A) is a cross-sectional view of a heat shield structure sewn into a bag according to claim 1, and (b) is a cross-section of two fire-resistant fiber woven fabrics coated with silicone resin on one side according to claim 2. Figure, (c)
The figure is a cross-sectional view of a state in which the fireproof fiber woven fabric according to claim 3 and the fireproof fiber woven fabric coated with a silicone resin on one side are overlapped, (d)
The drawing is a cross-sectional view of a state in which a cylindrical bag assembly is formed by communicating with each other by sewing in a lattice shape or a spiral shape when sewing the bag of claim 4.

[Explanation of symbols]

 1 Thermal Insulation Dome 2 Upper Surface Cross 3 Lower Surface Cross 4, 62 Silicone Resin 5 Circumferential Area 6 Silica Woven 7 Thread 8 Ceramic Fiber Woven 9 Ceramic Tape 10 Air Inlet 11 Vent 12 Exhaust Valve 13 Dome Support Rod 14 Internal Pressure Adjustment Damper 15 Damper room brick 16 Manhole 17 Balance weight 18 Brick wall 19 Collecting flue upstream room 20 Reactor pressure adjustment damper room 21 Chimney 61 Fireproof fiber woven 63 Cylindrical bag

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Yamazaki 1850 Minato, Wakayama, Wakayama Sumitomo Metal Industries, Ltd. Wakayama Works (72) Inventor Tomihiro Takahashi 3-chome, Honohara, Aichi Prefecture Isolite Industrial Co., Ltd. Company Toyokawa Factory (72) Inventor Yasuyuki Hayashi, Otowa Town, Aichi Prefecture, Otowa Town, Hagi 7 Mukaiyama, Isolite Industry Co., Ltd. Ceramic Fiber Division Otowa Factory

Claims (6)

[Claims] 1. A fireproof fiber woven fabric coated with a silicone resin on one side is sewn into a bag with the silicone resin coated sides being the inner sides of each other, and the bag is blown with air to inflate to form a heat shield wall. Heat insulation device for hot repair of industrial kiln. 2. The heat insulating device for hot repair of an industrial kiln according to claim 1, wherein two or more fireproof fiber woven fabrics each having a silicone resin applied on one side thereof are stacked and sewn into a bag. 3. A heat protection device for hot repair of an industrial kiln according to claim 1, wherein the fireproof fiber woven fabric and the fireproof fiber woven fabric coated with a silicone resin on one surface are sewn into a bag. . 4. The heat of an industrial kiln according to claim 1, wherein, when the bag is sewn, the pouch aggregates are formed by communicating with each other by sewing in a lattice shape or a spiral shape. Heat protection device for repairs. 5. The heat insulating device for hot repair of an industrial kiln according to claim 1, wherein an air supply port for supplying air is connected to the sewn bag. 6. The industrial kiln according to claim 1, wherein an air supply port for supplying air to the sewn bag and an air discharge port for discharging the air filled in the bag are connected to each other. Heat protection device for hot repair of.