Boiler chimney body and method for forming its inner wall protection structure

Abstract

The invention relates to a boiler chimney and the method for forming inner-wall protective element. The inventive boiler comprises an outer frame and a liner. Wherein, said liner has a inner-wall protective, which is formed by a polymer silicate solidify layer, a epoxy paint solidify layer while said two layers can be resistant to acid and high temperature, and a strength layer; the polymer silicate solidify layer is fixed on the inner surface of liner; the epoxy paint solidify layer is fixed on the polymer silicate solidify layer; the strength layer is glass fiber grid cloth, which is extended and embedded into the polymer silicate solidify layer, or individually embedded into the polymer silicate solidify layer and the epoxy paint solidify layer to form the inner-wall protective element. Said invention has lower cost, the high temperature resistance, antisepsis property and the anti-leakage property.

Description

technical field [0001] The invention relates to a chimney body and a method for forming its inner wall protection structure, which is especially suitable as a boiler chimney of a thermal power plant. Background technique [0002] The boiler chimney body of a conventional thermal power plant (the chimney body refers to the cylindrical part above the chimney foundation) includes an outer shell and a lining fixed in the outer shell. The outer shell is usually made of reinforced concrete, and the height direction of the inner wall There is a circle of inwardly protruding steps used to support the lining at intervals. The lining of the chimney body is generally formed by casting heat insulating materials such as lightweight ceramsite, alumina cement, and lightweight brick sand. Some are also made of light bricks or clay red bricks. There is also a space for air convection between the non-stepped part of the outer casing and the lining. Generally, when the flue gas at a temperat...

AI Technical Summary

Problems solved by technology

Then, because the surface of the heat pipe in the GGH is not only tested by high-temperature flue gas, but also corroded by acid gas and acid dew in the pipe, it is damaged internally and externally. , is to block the passage between the heat pipes, so that the flue gas flow is not smooth, resulting in pressure fluctuations in the boiler, difficult operation, and lower output rates.

In addition, this kind of GGH maintenance is particularly difficult, time-consuming and labor-intensive

A series of problems have brought hidden dangers to the safe long-term operation of power generation and desulfurization devices in power plants, and also forced many power plants to start and stop desulfurization devices. Although there are human factors, the more important factor is equipment factors.

For this reason, only by removing the GGH device can we fundamentally solve the international problems that restrict thermal power plants from unstable operation of power generation equipment, insufficient yield, and inability to match the operation of desulfurization devices.

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