JPS63118516A - Method of dismantling lining of stack - Google Patents

Abstract

PURPOSE:To perform a breaking and dismantling of the lining of a stack without noise and vibration, and not to hurt the steel plate of a stack body, by inserting specified hollow material in the lining and by injecting a static breaking agent into the hollow material at the time of dismantling of the lining. CONSTITUTION:A plurality of paper tubes 13 are bonded and are fixed in a lining in the vertical direction along the steel plate 10 of a stack body before a dismantling work is performed to a heat insulating lining 11. As for the paper tubes 13, the quality and the thickness of the paper must be determined previously so as not to be crushed at the time of providing the lining, and at the same time, the setting number and positions of paper tubes 13 having to be properly determined beforehand in relation to the effect and description of a static breaking agent, and to the thickness and the strength of a heat insulating lining 11 and an acid resistant lining 12. At the time of dismantling, a vinyl bag 15 is inserted into the paper tubes 13 from the direction of (a). Then water is injected into the bag 15 by hose while the vinyl bag 15 is charged with a static breaking agent 16 from the direction of (a). The static breaking agent 16 reacts on water, expanding, and produces the expansion pressure.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for dismantling a chimney lining.

[Conventional technology]

FIGS. 6(a) and 6(b) are a cross-sectional view and a partial longitudinal cross-sectional view showing an example of a conventional method for dismantling a chimney lining. In the figure, 1 is the chimney body, 2 is the existing lining, and 3 is a pick driven by a compressor (not shown). In this disassembly method, the big 3 is driven by a compressor to vibrate, and then vibration is applied to the lining 2 to crush and dismantle the lining 2.

FIGS. 7(a) and 7(b) are a cross-sectional view and a partial longitudinal cross-sectional view showing an example of another conventional chimney lining disassembly method. 4 is a hydraulic drive arm 5a that is provided in the diametrical direction of the chimney and is diametrically extensible and retractable.

Denoted at 5b are claws provided at both ends of the arm 4 for crushing and disassembling the lining (2). The arm 4 is driven in the direction of the outer circumference of the chimney by hydraulic drive, and the lining 2 is crushed and dismantled by the pressure of the claws 5a and 5b. In addition, the seventh
Although Figures (a) and (b) show the case where there is one arm 4 for dismantling the existing lining 2, it is also possible to use a drive device that uses two arms and combines them in a cross shape. be.

However, in this case as well, the effect is the same as in the case of one arm.

[The point at which the invention attempts to solve]

According to the conventional method for dismantling the chimney lining configured as described above, the method of first vibrating the pick 3 with a compressor (Fig. 6 (a), (b)) has extremely low work efficiency and generates large vibrations. As a result, there is a problem in that significant noise is generated, which may cause pollution to the surrounding area, and the working environment for workers is also extremely poor. In addition, the work requires a high degree of skill, and the chimney body 1 is
There was also the problem that there was a risk of damaging the steel plate.

On the other hand, with the method of dismantling the lining by extending and retracting the arm 4 using hydraulic pressure (see Figure 7 (a) and (b)), the entire device including the hydraulic system is complicated, so failures are likely to occur, and the hydraulic capacity is The problem was that it was very difficult to adjust. In addition, since the lining 2 is generally non-shrinkable, the claws (5a) provided at the end of the arm 4, (5
There is a problem that it is difficult to break even if pushed hard in b), and if pushed too hard, there is a risk of damaging the steel plate of the chimney body 1 (generally causing local permanent deformation on the outside), making adjustment extremely difficult. Ta. Furthermore, the manufacturing cost of the device was high, and it was not easy to move the settings of the device.

The present invention has been made to solve the above-mentioned problems, and the crushing and dismantling of chimney linings can be carried out without noise and vibration, and the working environment is good. The purpose of this invention is to obtain a method for dismantling a chimney lining without causing damage to the chimney lining.

[Means for solving problems]

The present invention has been made to achieve the above objects,
When lining a chimney, a hollow material made of paper tube, plastic, etc. with a specified heat resistance and strength is placed in the lining in advance, and when the lining is dismantled, a static crushing agent is injected into the hollow material. This invention provides a method for dismantling chimney lining by crushing and dismantling the lining.

[Effect]

When dismantling the chimney lining, a static crushing agent is injected into the hollow material embedded in the chimney lining, and the lining is crushed and dismantled by expanding its volume.

〔Example〕

FIGS. 1(a) and 1(b) are a cross-sectional view and an AA sectional view thereof showing an embodiment of the present invention. 10 is a cylindrical steel plate provided on the outside of the chimney. In addition, 11 is the cylinder steel plate 1
0 is a heat insulating lining provided inside the heat insulating lining 11, and 12 is an acid resistant lining provided further inside the heat insulating lining 11.
．． The acid-resistant lining 12 is applied to the inner peripheral surface of the chimney by spraying. Reference numeral 13 denotes a plurality of paper tubes that are adhesively fixed in the vertical direction along the tube steel plate 10 before the heat insulating lining 11 is installed. The material and thickness of the paper for this paper tube 13 are determined in advance so that it will not be crushed during lining construction.
In addition, the number and arrangement of the static crushing agents are appropriately determined in relation to the capacity and properties of the static crushing agent (described later) and the thickness and strength of the heat insulating lining 11 and the acid resistant lining 12. In addition, 14 is a drainage hole provided at an appropriate interval and size in the length direction of the paper tube 13 (details are shown in FIGS. 2(a) and (b)), and 14a is a drain hole provided at the bottom of the paper tube 13. Ventilation pipe, 14b is the base (third
Figure). When smoke (exhaust gas) passes through the chimney after lining construction, surplus water from lining construction will seep out from inside the lining,
This was provided because if the temperature of the lining increases rapidly, there is no place for this moisture to escape and there is a risk that the lining will explode. That is, by providing the water drain hole 14 in the paper tube, the above-mentioned surplus water passes through the drain hole 14 and drains into the paper tube 13.
It enters the inside of the chimney, falls down inside the paper cylinder 13, and is discharged to the outside of the chimney through the ventilation pipe 14a. Also, after passing through the smoke, the heat of the smoke causes the paper tube to become
Even if the air inside 3 expands, the ventilation pipe 14. It can be adjusted by a.

A detailed explanation of the present invention configured as above is as follows. To dismantle the chimney lining (insulating lining 11, acid-resistant lining 12), first see Figure 4(a).
, As shown in (b), insert the plastic bag 15 into the paper cylinder 13 from the (a) direction using a stick or the like. this vinyl
The thickness of the bag 15 is the same as or larger than the inner diameter of the paper cylinder 13,
The length is determined in consideration of the diameter of the paper cylinder 13, the required dismantling speed, etc.

Next, put the static crushing agent 16 into the plastic bag 15 from the direction (A).
While filling the tank, add water using the hose.

The static crushing agent 16 is generally commercially available for crushing rocks, concrete, etc., and is used as it is, and expands by reacting with water to generate expansion pressure.

For this reason, FIG. 5(a).

As shown in (b), the paper cylinder 13 easily ruptures due to the volume expansion of the static crushing agent 16 inside the plastic bag 15, but since the cylinder body steel plate 10 side is restrained, this rupture occurs inside the chimney. Both the lining 11 and the acid-resistant lining 12 are in a tattered state due to the generated cracks 17, and can be easily chipped and dismantled. By repeating this operation for each fixed length of the paper tube 13, the heat insulating lining 11. The entire acid-resistant lining 12 can be dismantled.

In the above explanation, the chimney lining has a two-layer structure consisting of a heat insulating lining and an acid-resistant lining, but the present invention is not limited to this. can correspond to Further, the paper tube may be made of any hollow material having suitable heat resistance and strength, for example, it may be made of a hollow material made of plastic.

〔Effect of the invention〕

As is clear from the following explanations, the present invention has the following remarkable effects.

(1) Since the lining is crushed by volume expansion of the static crushing agent, it is safe, noiseless, and vibration-free. Therefore, it is possible to work at night or in a quiet place.

(2) The lining is crushed without noise and vibration, and no dust is generated during the initial crushing, so the working environment for workers is significantly improved and safety is therefore high. It also enables continuous work for longer periods than before.

(3) Since the crushing can be done without pushing with a shock absorber or hydraulic arm, there is no risk of damaging the steel plate of the cylinder like in the past, and in addition, advanced technology is not required for the work.

(4) Since the drain hole of the paper tube can be used as a passage for excess water during lining construction, there is no risk of explosion due to initial temperature rise of the lining.

[Brief explanation of the drawing]

FIGS. 1(a) and (b) are a cross-sectional view and its AA sectional view showing an embodiment of the present invention, and FIGS. 2(a) and (b) are
3 is an enlarged front view of the main part of the embodiment of the present invention and its BB sectional view, FIG. 3 is a longitudinal sectional view of the main part showing the embodiment of the invention, FIGS. (a) and (b) are explanatory diagrams of the operation of the embodiment of the present invention, and FIGS. 6 (a) and (b) are a cross-sectional view and a partial cross-sectional view thereof showing an example of a conventional chimney lining dismantling method, FIGS. 7(a) and 7(b) are a cross-sectional view and a partial cross-sectional view thereof showing an example of another dismantling direction of a conventional chimney lining. DESCRIPTION OF SYMBOLS 11... Heat insulation lining, 12... Acid-resistant lining, 13... Paper tube, 16... Static crushing agent.

Claims (2)

[Claims] (1) When constructing a chimney lining, a static crushing agent is injected into a hollow material having a predetermined heat resistance and strength that is embedded in the lining in advance, and the volume of the static crushing agent is expanded. A chimney lining dismantling method that involves crushing and dismantling the lining. (2) The method for dismantling a chimney lining according to claim (1), wherein the hollow material is a paper tube.