JP6908468B2 - Manhole device and installation method of manhole device - Google Patents

Description

The present disclosure relates to a manhole device and a method of installing the manhole device.

The place to install the manhole and suit blower in the bank part of the package boiler where the furnace and heat exchanger are integrated is formed by pulling out several rows of bank pipes, so the heat transfer area of the pulled out bank pipes is sacrificed. Therefore, the heat exchange efficiency is lowered. Therefore, it is desirable to install both the manhole and the suit blower in the same place in order to minimize the decrease in the heat exchange rate.

Patent Document 1 describes an invention in which both a manhole and a suit blower are installed, but an invention in which a clinker removing device is provided in a manhole of a coal-fired boiler. The present invention relates to a manhole device in which a refractory material is inserted inside a manhole formed on a furnace wall of a coal-fired boiler, a heat insulating material is inserted outside the fireproof material, and a manhole cover is provided on the outside of the heat insulating material. A through hole is formed through the refractory material, the heat insulating material, and the manhole cover, and a clinker removing device is inserted into the through hole.

Japanese Unexamined Patent Publication No. 11-82911

However, in order to install the suit blower in the manhole, it is necessary to provide the suit blower sleeve member into which the lance pipe of the suit blower is inserted in the through hole in the invention of Patent Document 1. In Patent Document 1, a through hole is formed after inserting a refractory material and a heat insulating material into the manhole. Therefore, when the suit blower sleeve member is inserted into the through hole, a gap is created around the suit blower sleeve member. There was a problem that the airtightness inside the furnace was lowered.

In view of the above circumstances, at least one embodiment of the present invention provides a manhole device and a method for installing a manhole device capable of arranging a sleeve member in the manhole so that there is no gap between the manhole and the heat insulating material filled in the manhole. The purpose is to provide.

(1) The manhole device according to at least one embodiment of the present invention is
A manhole device for closing a manhole formed on the furnace wall of a boiler.
A manhole cover that closes the manhole from the outside of the furnace and has a through hole that communicates with the manhole.
A tubular sleeve member inserted into the through hole, and a sleeve member fixed to the furnace wall via a bracket connected to the outer peripheral surface of the sleeve member.
A heat insulating material filled around the sleeve member in the manhole is provided.

According to the configuration of (1) above, since the sleeve member is fixed to the furnace wall via a bracket connected to the outer peripheral surface thereof, the manhole can be filled with the heat insulating material after the sleeve member is fixed. Therefore, the sleeve member can be arranged in the manhole so that there is no gap between the heat insulating material and the heat insulating material.

(2) In some embodiments, in the configuration of (1) above,
The sleeve member is a suit blower sleeve tube into which a suit blower lance tube is inserted.

According to the configuration of (2) above, a suit blower can be installed in the manhole.

(3) In some embodiments, in the configuration of (1) or (2) above,
Further provided with a refractory block provided inside the furnace of the heat insulating material in the manhole,
The tip of the inside of the furnace in the sleeve member is located outside the surface of the inside of the fire of the refractory block.

According to the configuration of (3) above, since the tip of the sleeve member inside the furnace is protected by the refractory block, damage to the sleeve member due to heat in the furnace can be suppressed.

(4) The method of installing the manhole device according to at least one embodiment of the present invention is as follows.
It is a method of installing a manhole device for closing a manhole formed on the furnace wall of a boiler.
A sleeve member installation step for installing a tubular sleeve member in the manhole, and a sleeve member installation step for fixing the sleeve member to the furnace wall via a bracket connected to the outer peripheral surface of the sleeve member. ,
After the sleeve member installation step, a heat insulating material filling step of filling the circumference of the sleeve member with a heat insulating material in the manhole,
After the heat insulating material filling step, a manhole cover installation step for installing a manhole cover that closes the manhole from the outside of the furnace is provided.

According to the configuration of (4) above, since the heat insulating material can be filled in the manhole after the sleeve member is fixed to the furnace wall, the sleeve member is arranged in the manhole so that there is no gap between the sleeve member and the heat insulating material. be able to.

(5) In some embodiments, in the method (4) above,
Prior to the sleeve member installation step, a refractory block installation step of providing a refractory block inside the furnace of the heat insulating material in the manhole is further provided.

According to the configuration of (5) above, since the inner portion of the sleeve member inside the furnace can be protected by the refractory block, damage to the sleeve member due to heat in the furnace can be suppressed.

According to at least one embodiment of the present invention, the heat insulating material can be filled in the manhole after the sleeve member is fixed to the furnace wall, so that the sleeve member is formed in the manhole so that there is no gap between the sleeve member and the heat insulating material. Can be placed.

It is sectional drawing of the manhole apparatus which concerns on embodiment of this invention. It is a perspective view of the seal box used for the manhole apparatus which concerns on embodiment of this invention. It is a perspective view of the sleeve material and the bracket used for the manhole apparatus which concerns on embodiment of this invention. It is a figure which shows the state which inserted the lance pipe of the suit blower into the sleeve member of the manhole device which concerns on embodiment of this invention.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the scope of the present invention is not limited to the following embodiments. The dimensions, materials, shapes, relative arrangements, and the like of the components described in the following embodiments are not intended to limit the scope of the present invention only to them, but are merely explanatory examples.

FIG. 1 shows a manhole device 10 for closing a manhole 12 formed on a furnace wall 11 of a boiler. The furnace wall 11 is arranged between the refractory material 13 provided on the inner peripheral edge of the manhole 12 and the refractory material 14 provided on the outside of the fire pot 13 and the refractory material 13 and the heat insulating material 14. It also includes a seal box 15 that covers the refractory material 13 from the outside of the furnace. As shown in FIG. 2, the seal box 15 has a box shape including four rectangular side surfaces and one bottom surface 15b, and a hole 15a is formed in the center of the bottom surface 15b. As shown in FIG. 1, the hole 15a overlaps with the manhole 12 in a state where the seal box 15 is arranged so as to cover the refractory material 13. A plurality of bank side wall pipes 16 are arranged inside the furnace wall 11, and some of the bank side wall pipes 16 are embedded in the refractory material 13.

A tubular sleeve member 20 is arranged in the manhole 12. The sleeve member 20 is fixed to the furnace wall 11 in the manhole 12 by connecting one end of the bracket 21 to the outer peripheral surface 20a of the sleeve member 20 and fixing the other end of the bracket 21 to the seal box 15 by bolts 22. Has been done. As shown in FIG. 3, the sleeve member 20 is provided with two brackets 21, and each bracket 21 is supported by a plate-shaped support portion 23 having one end connected to the outer peripheral surface 20a of the sleeve member 20. It has a connecting portion 24 provided at the other end of the portion 23. The connecting portion 24 has an L-shaped cross-sectional shape, and the connecting portion 24 is formed with two bolt holes 25 into which bolts 22 (see FIG. 1) are inserted. By not only fixing to the furnace wall 11 but also configuring the bracket 21 in this way, the bracket 21 does not become an obstacle when the heat insulating material 33 is installed around the sleeve member 20 from the front of the opening.

As shown in FIG. 1, a refractory block 31 is provided inside the manhole 12 most inside the furnace. The refractory block 31 defines an insertion hole 39 that communicates the manhole 12 with the inside of the boiler furnace and allows the sleeve member 20 to be inserted. The tip 20b inside the furnace of the sleeve member 20 is located outside the furnace inside the surface 31a inside the fireproof block 31 in the insertion hole 39. A mortar 32 is installed on the surface 31b of the fireproof block 31 on the outside of the furnace, and a heat insulating material 33 is provided on the outside of the fire of the mortar 32. A mortar 34 is installed on the surface 33b on the outside of the furnace of the heat insulating material 33, and a heat insulating material 35 is provided on the outside of the furnace of the mortar 34. The heat insulating material 35 is covered with a heat insulating material 14 from the outside of the furnace.

A manhole cover 30 is fixed to the furnace wall 11 from the outside of the furnace by bolts 36 so as to close the manhole 12 from the outside of the furnace. The manhole cover 30 has a through hole 30a formed in the center thereof so as to communicate with the manhole 12. In the through hole 30a, the end portion 20c of the sleeve member 20 on the outside of the furnace is inserted into the through hole 30a.

Next, a method of installing the manhole device 10 will be described.
Since the manhole 12 is used as an approach path for workers during inspection, among the various members constituting the manhole device 10 described below, the heat insulating material and the mortar are used when the manhole is released during inspection. It will be removed, inspected and renewed when the manhole is closed. The other members constituting the manhole device 10 are temporarily removed when the manhole is released, but can be reused when the manhole is closed. The method of installing the manhole device 10 described below is for installing the manhole device 10 at the time of new installation or after inspection.

As shown in FIG. 1, first, a refractory block 31 is provided inside the manhole 12 so that the insertion hole 39 is defined inside the furnace. Next, the tip 20b of the sleeve member 20 is inserted into the insertion hole 39, and the sleeve member 20 is positioned in the manhole 12 so that the tip 20b is located on the outside of the furnace with respect to the surface 31a inside the fire of the refractory block 31. , The bracket 21 is fixed to the seal box 15 with the bolt 22. As a result, the sleeve member 20 is fixed to the furnace wall 11 in the manhole 12.

Next, the mortar 32 is installed on the outer surface 31b of the refractory block 31. After the construction of the mortar 32, the heat insulating material 33 is filled around the sleeve member 20 on the outside of the furnace of the mortar 32. At this time, since the sleeve member 20 is fixed to the furnace wall 11, the heat insulating material 33 is closely attached to the outer peripheral surface 20a of the sleeve member 20 so that a gap is not formed between the sleeve member 20 and the outer peripheral surface 20a of the sleeve member 20. Can be filled.

Next, the mortar 34 is applied to the surface 33b on the outside of the furnace of the heat insulating material 33. After the construction of the mortar 34, the heat insulating material 35 is filled around the sleeve member 20 on the outside of the furnace of the mortar 34. As in the case of filling the heat insulating material 33, the heat insulating material 33 can be densely filled with the outer peripheral surface 20a of the sleeve member 20 so that a gap is not formed between the sleeve member 20 and the outer peripheral surface 20a.

After that, the heat insulating material 35 is covered with the heat insulating material 14 from the outside of the furnace. Next, the end 20c of the sleeve member 20 is inserted into the through hole 30a, the manhole 12 is closed from the outside of the furnace by the manhole cover 30, and the manhole cover 30 is fixed to the furnace wall 11 by the bolt 36. In this way, the manhole device 10 is installed.

In this way, since the heat insulating materials 33 and 35 can be filled in the manhole 12 after the sleeve member 20 is fixed to the furnace wall 11, the manhole 12 is filled with the heat insulating materials 33 and 35 so that there is no gap between them. The sleeve member 20 can be arranged.

After installing the manhole device 10, as shown in FIG. 4, the lance pipe 40 of the suit blower is inserted into the sleeve member 20 from the end 20c side, and steam is injected from the lance pipe 40 to the bank side wall pipe 16. Adhering ash and soot can be removed.

In the manhole device 10, since the tip 20b of the sleeve member 20 is located on the outside of the furnace with respect to the surface 31a inside the furnace of the refractory block 31, the tip 20b is protected by the refractory block 31, so that the heat inside the furnace is heated. Damage to the sleeve member 20 due to the above is suppressed.

In this embodiment, the sleeve member 20 is a suit blower sleeve tube into which the lance tube 40 of the suit blower is inserted, but is not limited thereto. Anything that is inserted into the furnace may be inserted into the sleeve member 20.

In this embodiment, the furnace wall 11 includes a refractory material 13, a heat insulating material 14, and a seal box 15 arranged between them, but the present invention is not limited to this form. Any form of the furnace wall may be used, such as those having different arrangement forms or those without the seal box 15.

10 Manhole device 11 Furnace wall 12 Manhole 13 Refractory material 14 Heat insulating material 15 Seal box 15a Hole 15b Bottom surface 16 Bank side wall pipe 20 Sleeve member 20a (Sleeve member) Outer surface 20b (Sleeve member) Tip 20c (Sleeve member) end Part 21 Bracket 22 Bolt 23 Support 24 Connection 25 Bolt hole 30 Manhole cover 30a Through hole 31 Fireproof block 31a (Fireproof block) Surface 31b (Fireproof block) Surface 32 Mortar 33 Insulation 33b (Heat insulation) Surface 34 Mortar 35 Insulation material 36 Bolt 39 Insertion hole 40 Lance pipe

Claims (5)

A manhole device for closing a manhole formed on the furnace wall of a boiler.
A manhole cover that closes the manhole from the outside of the furnace and has a through hole that communicates with the manhole.
A tubular sleeve member inserted into the through hole, and a sleeve member fixed to the furnace wall via a bracket connected to the outer peripheral surface of the sleeve member.
A manhole device including a heat insulating material filled around the sleeve member in the manhole. The manhole device according to claim 1, wherein the sleeve member is a suit blower sleeve pipe into which a suit blower lance pipe is inserted. Further provided with a refractory block provided inside the furnace of the heat insulating material in the manhole,
The manhole device according to claim 1 or 2, wherein the tip of the inside of the furnace in the sleeve member is located outside the surface of the inside of the fire of the refractory block. It is a method of installing a manhole device for closing a manhole formed on the furnace wall of a boiler.
A sleeve member installation step for installing a tubular sleeve member in the manhole, and a sleeve member installation step for fixing the sleeve member to the furnace wall via a bracket connected to the outer peripheral surface of the sleeve member. ,
After the sleeve member installation step, a heat insulating material filling step of filling the circumference of the sleeve member with a heat insulating material in the manhole,
A method for installing a manhole device including a manhole cover installation step for installing a manhole cover that closes the manhole from the outside of the furnace after the heat insulating material filling step. The method for installing a manhole device according to claim 4, further comprising a refractory block installation step of providing a refractory block inside the furnace of the heat insulating material in the manhole before the sleeve member installation step.

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