A large wall structure of an all-oxygen combustion glass melting furnace and its coating manufacturing method

Abstract

The invention provides a crown structure of a pure-oxygen combustion glass melting furnace and a coating production method thereof. The crown structure comprises an arched part and a crown corner part, wherein two ends of the arched part are supported at the upper end of a breast wall of the pure-oxygen combustion glass melting furnace; the crown corner part is arranged between the two ends of the arched part; a crown block, a heat insulation layer and a coating are arranged from the outside to the inside of the arched part in sequence; the heat insulation layer is formed by splicing heat insulation bricks which are made of zirconium dioxide fibers; the crown block is fixed to the heat insulation layer; a chromic oxide coating is arranged on the inner surface of the heat insulation layer. The crown structure of the pure-oxygen combustion glass melting furnace can be constructed on the basis of the existing crown; the heat insulation layer and the coating capable of insulating heat, resisting high temperature and resisting corrosion of alkaline liquor are respectively arranged on the inner wall of the crown structure; the damage to the crown caused by pure-oxygen combustion can be reduced; meanwhile, the infrared reflection of the heat can be facilitated, so that the radiation heat transfer of the flame to the glass liquid can be improved; the heat efficiency of the pure-oxygen combustion glass melting furnace can be improved.

Description

technical field [0001] The invention belongs to the technical field of glass manufacturing, and relates to a large wall structure of a glass melting furnace and a method for manufacturing the coating thereof, in particular to a large wall structure of an all-oxygen combustion glass melting furnace resistant to high-temperature flame loss and a method for manufacturing the same. Background technique [0002] Oxygen combustion technology is to change the air-fuel combustion system into an oxygen-fuel combustion system, and the combustion-supporting medium uses oxygen with a purity of 90%. The structure of the oxy-fuel combustion glass melting furnace is similar to that of a unit kiln, eliminating the need for regenerators and small furnaces, adding oxy-fuel or natural gas spray guns on the parapet, which greatly improves the combustion efficiency; due to the increase in the concentration of alkali vapor, it is required The alkali resistance and refractoriness of the refractory...

AI Technical Summary

Problems solved by technology

The disadvantage of this scheme is that it will increase the flame space of the glass furnace and reduce the energy saving effect of the oxy-fuel glass furnace

Neither of these two schemes and structures can achieve satisfactory results

[0004] The utility model with the authorized announcement number CN 201785301 U provides a corner structure of an all-oxygen combustion furnace, including a large corner of a glass furnace, corner bricks and a breast wall of a glass furnace supporting corner bricks. The edges of the corner bricks are relatively The inner wall of the breast wall of the glass furnace deviates inward, so that a large amount of molten fluid generated during the operation of the oxy-fuel glass furnace flows down directly along the corner bricks, thereby reducing the erosion and erosion of the breast wall of the glass furnace. There are the following deficiencies: since the flame mainly scours and erodes the upper wall, the technical solution of this utility model cannot reduce the burning loss of the wall by the oxy-fuel combustion flame; the corner bricks in this utility model are directly along the glass furnace The inside wall of the parapet deviates inwards, its underside is horizontal, and the angle bricks have a limited amount of inward deviation, which may cause leakage of melt flow along the horizontal plane of the parapet to the outside of the parapet

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