JPS63105310A - Lining protective method in stack cylinder - Google Patents

Abstract

PURPOSE:To prevent corrosion, deterioration of lining material and its splashing into surrounding atmosphere by a method wherein a thermally expandable or retractable anti-corrosion thin plate is applied to cover a surface of the lining material within a stack cylinder in a height direction of the stack. CONSTITUTION:A lining material 2 is provided with core ring holes 3 at every desired locations, fastening fittings 4 are inserted into each of the core ring holes and then welded to a cylinder 1. Thus, an inner circumferential surface of the lining material 2 has a belt-like anti-corrosion thin plate 5 composed of stainless steel and the like in a spiral form downwardly or upwardly or from upward to downward. Overlapped portions of the upper and lower adjoining thin plates 5 are connected to each other by spot welding 6, and at the same time the upper edge of the belt-like anti-corrosion thin plate 5 is restricted by some fastening fittings fixed to the fastening fitting 4 without being welded directly to the fastening fitting 4 in order to absorb an expansion due to an increased temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for protecting the lining inside a chimney barrel.

(Prior Art) As shown in Fig. 5, the chimney body consists of a steel plate (a), a receiving material (1)) and a lining material (d) supported by reinforcing bars (C) or laths, as shown in Fig. 5. was protected by.

However, the lining material undergoes corrosion and deterioration due to toxic gas components in the exhaust gas, causing cracking and scattering into the atmosphere along with the emitted gas.

For this reason, conventionally, as shown in Fig. 6, the lining material was replaced and
It is being repainted.

In the figure, (f) is the support beam of the gondola, (g) is the pulley, and (h)
is the suspended bed of the gondola and is connected to a winch.

(Problems to be Solved by the Invention) The conventional method has problems in that the construction period is long and that equipment using chimneys cannot be used for long periods of time, resulting in losses.

(Means for Solving the Problems) The present invention was proposed to solve the above problems, and it covers the surface of the lining material inside the chimney barrel and is resistant to thermal expansion and contraction in the height direction of the chimney. The present invention relates to a method for protecting the lining inside a chimney barrel, which is characterized by attaching a perishable thin plate.

(Function) As described above, in the present invention, by installing a corrosion-resistant thin plate to cover the surface of the lining material inside the chimney barrel, corrosion and deterioration of the lining material layered inside the chimney barrel are prevented, and the exhaust gas This prevents it from being dispersed into the atmosphere along with the gas.

(9) Since the corrosion-resistant thin plate is attached to the chimney so that it can be expanded and contracted by heat in the height direction of the chimney, there is no risk that it will be damaged by the heat inside the chimney.

(Effects of the Invention) According to the present invention, corrosion of the lining material is prevented by installing a corrosion-resistant thin plate covering the surface of the lining material inside the chimney barrel so that it can be thermally expanded and contracted in the height direction of the chimney. In addition to preventing deterioration and scattering into the atmosphere, the present invention also prevents damage to the thin plate due to heat. There is no need to suspend operation of the chimney for a long period of time.

(Example) The present invention will be described below with reference to the illustrated embodiments.

In FIGS. 1 to 3, (1) is a steel plate cylinder body of a chimney, and (2) is a two-lining material layered on the inner surface of the cylinder body (1).

The lining material (2) has coring holes (
3), and a mounting bracket (4) of the same size is inserted and welded to the barrel (1).

Then, a strip-shaped corrosion-resistant thin plate (5) made of stainless steel or the like is layered on the inner circumferential surface of the lining material (2) in a spiral shape from the bottom to the top or from the top to the bottom,
Spot welding (
6), and the upper edge of the strip-shaped corrosion-resistant thin plate (5) is attached to the mounting bracket (4) without being directly welded to the mounting bracket (4) in order to absorb elongation due to temperature rise. It is restrained by the attached presser metal fitting (7).

Since the illustrated embodiment is configured as described above, the corrosion-resistant thin plate (5) prevents the lining material (2) from corrosion, deterioration, and scattering into the atmosphere, and the corrosion-resistant thin plate ( 5) is installed so that it can be expanded and contracted by heat in the height direction of the chimney, so it will not be damaged by heat, and according to the above embodiment, it is possible to replace the lining material and repaint it. There is no longer any need to shut down the chimney for a long period of time.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the invention. For example, the corrosion-resistant thin plate (5) is S/R.
Corrosion-resistant thin plate (5) consisting of a cylindrical ring layered in a radial pattern and with its ends polymerized and welded as shown in Figure 4.
may be joined by welding (8).

In this case, the above-mentioned coiled corrosion-resistant thin plate is installed in a gondola placed in the chimney, and the thin plate is cut at each ring layer.

Note that the connection between the thin plates (5) and the connection of the thin plates (5) with the copper plate of the cylinder body (1) may be achieved by any means such as metal fittings or screws. However, expansion joints are provided at regular intervals to absorb the expansion and contraction of the thin plate.

[Brief explanation of the drawing]

Fig. 1 is a partial longitudinal cross-sectional side view of a lining protection part in a chimney barrel constructed by the method of the present invention, Fig. 2 is a partial slope view thereof, and Fig. 3 is a longitudinal cross-section of a chimney equipped with the two-line protection part. Fig. 4 is a perspective view showing another example of a corrosion-resistant thin plate, Fig. 5 is a partial longitudinal sectional side view of a conventional chimney barrel, and Fig. 6
The figure is a longitudinal sectional view showing the state of implementation of the conventional lining prevention method. (1)...Cylinder body (2)...Lining material (5)...Corrosion-resistant thin plate Sub-agent Patent attorney Shige Okamoto 2 other persons

Claims (1)

[Claims] A method for protecting a lining inside a chimney barrel, which is characterized by installing a corrosion-resistant thin plate that can be thermally expanded and contracted in the height direction of the chimney to cover the surface of the lining material inside the chimney barrel.