JPH01244210A - Chimney lining structure - Google Patents

Abstract

PURPOSE:To enable the life of a lining structure more than two times a conventional life of 5-6 years by a method wherein a resin immersion preventive layer mixed with flake is arranged on an inner surface of a steel cylindrical material and a non-organic lining having a high acid-resistance and a non- organic lining having a high anti-corresion are provided so as to form a double- layer structure. CONSTITUTION:An inner surface of a steel cylindrical material 1 is provided with an immersion preventive layer 2 composed of a normal temperature hardening thermosetting resin mixed with flake. A cement castable 3 containing anti- acid agent of CaO of 1-3wt% is applied on it. That is, an anti-acid characteristic is improved because of contained anti-acid agent of CaO of 1-3wt%. Since a more presence of cement castable 3 is insufficient in view of its structure as well as an anti-corrosion characteristic, a steel metallic rod 4 with 6-9Mphi is preferably arranged vertically so as to reinforce it. In addition, a steel net 5 is arranged and a water glass type castable 6 is applied on it. This means that a non-organic lining contacting with a discharged gas may endure an anti- corrosion characteristic and as for an anti-acid characteristic, a non-organic lining material of second layer is applied for protection.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a chimney lining structure.

(Prior art) Traditionally, chimney lining was made of l:4 gunite (cement:1:
An inorganic lining such as sand 4) was used. Especially when flowing combustion fuel exhaust gas into a chimney, KSOx in the exhaust gas is
Because it contains acidic components such as XNOx C1, if used for a long time, the lining will fall off and the steel cylinder of the chimney will corrode and thin through the pores in the lining. As a conventional technique to solve this problem, Japanese Patent Application Laid-open No. 61-1
0! >As shown in Publication No. 019, a flake lining is applied to the inner surface of the cylinder material, a wire mesh is fixed on the flake lining, and an inorganic lining material of the required thickness required from the maximum exhaust gas temperature is placed on the wire mesh. There are chimney and duct linings that are characterized by the fact that As shown in Fig. 2, this chimney/duct lining is made by applying a penetration prevention layer 2 of flake lining to the inner surface of a steel cylinder material 1, and then applying a wire mesh fixing jig 8 made of the same material as the above-mentioned flake lining.
is provided and fixed with adhesive 7. Reference numeral 9 indicates an inorganic lining, which is a single-layer caster pull such as 1:4 gunite or water glass caster pull.

(Problem to be solved by the invention) There are generally two types of inorganic lining materials: those with strong acid permeability and those with excellent corrosion resistance. However, with the current technology, there is no inorganic lining material that has strong acid permeability and excellent puncture resistance. One of the problems with the conventional technology is that as shown in Figure 2, the inorganic lining material is a single layer, so when 1:4 gunite and water glass cement are used, the porosity is high and acid easily penetrates. Even if flake lining is applied, there is a problem in that the @ made barrel material will noticeably lose its thickness after long use. Furthermore, even if an inorganic lining material with excellent corrosion resistance is used, if there is no reinforcement for the entire lining material, the lifespan will be only 5 to 6 years at most.

(Means for Solving the Problems) The present invention advantageously solves the drawbacks of the prior art, and includes a penetration prevention nozzle made of a room temperature curing thermosetting resin mixed with flakes on the inner surface of the steel cylinder material. and C on top of it.
This chimney lining structure is characterized in that a cement caster pull containing 1 to 3% by weight of an aO acid-resistant agent is applied, the surface of the cement caster pull is fixed with a wire mesh, and a water glass caster pull is applied on top of the cement caster pull. .

(Effect) and (Example) The following will be explained based on the drawings.

The gt diagram is a sectional view showing the chimney lining structure of the present invention. A penetration prevention layer 2 made of a cold-curing thermosetting resin mixed with flakes is provided on the inner surface of the steel cylinder material 1. It is sufficient for this permeation prevention layer to have a thickness of about 500 μm. Cement-based caster pull 3 containing 1 to 3% by weight of CaO-based acid-resistant agent is applied thereon. → Nimento caster pull 3
is 5i0260 to 80 polymers and 10 to 15% by weight of cement, which has little acid penetration and strong acid resistance, but poor corrosion resistance.

Therefore, 1 to 3% by weight of a CaO-based acid-resistant agent is included to improve acid resistance. Since there is no effect if it is less than 1% by weight, the lower limit is set to 1% by weight, and since the effect remains unchanged even if it is increased to 3% by weight or more, the upper limit is set to 3% by weight. Cement caster pull 3 alone is structurally insufficient in terms of corrosion resistance, so it is preferable to use 6
A steel metal rod 4 of ~9 Mφ is placed in the cement caster pull 3 in a direction perpendicular to the flow of exhaust gas for reinforcement, as shown in the figure. A steel wire mesh 5 is provided thereon. This wire mesh 5 is constructed to suppress deterioration of adhesion and peeling at the boundary area between two layers of inorganic caster pull due to differences in materials. A water glass-based gastable 6 is applied on this wire mesh 5.

This water glass caster pull 6 has 5io270-80
It contains 15 to 20 y/w of water glass, and has strong corrosion resistance but is weak against acid penetration. This is based on the idea that corrosion resistance is important for the inorganic lining that comes into contact with the exhaust gas, and acid resistance is protected by the second layer of internal inorganic lining material.

(Effects of the Invention) The present invention provides a resin penetration prevention layer and has a two-layer structure consisting of an inorganic lining with strong acid resistance and an inorganic lining with strong corrosion resistance. It is reinforced with metal rods to improve the lifespan of the chimney lining, and the lifespan of the chimney lining is increased by approximately 2 years compared to the conventional 5 to 6 years.
It has twice the lifespan.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the chimney lining of the present invention, and FIG. 2 is a sectional view of the chimney lining of the prior art. 1 is a steel cylinder material, 2 is a penetration prevention material, 3 is a cement-based caster pull, 4 is a metal rod, 5 is a wire mesh, 6 is a water glass caster pull, 7 is an adhesive material, 8 is a fixing jig, 9 is an inorganic material Type caster pull.

Claims (1)

[Claims] A penetration prevention layer made of a cold-curing thermosetting resin mixed with flakes is provided on the inner surface of the steel cylinder material, and a CaO
A chimney lining structure characterized in that a cement caster pull containing 1 to 3% by weight of an acid-resistant agent is applied, the surface of the cement caster pull is fixed with a wire mesh, and a water glass caster pull is applied thereon.