A refractory brick used for the lower part of the expansion joint of the cylinder body of the coal-water slurry gasifier

Abstract

The invention discloses a refractory brick applied to the lower part of an expansion joint of a coal water slurry gasifier cylinder. The refractory brick is similarly composed of first, second and third sector rings with different heights in a superimposing manner from bottom to top, wherein the radius of an inner circle of the first sector ring is the same as that of the inner circle of the second sector ring; the radius of an outer circle of the first sector ring is greater than that of the outer circle of the second sector ring; the radius of the inner circle of the third sector ring is greater than that of the inner circle of the second sector ring; the radius of the outer circle of the third sector ring is the same as that of the outer circle of the second sector ring; and the upper surface of the third sector ring is composed of a slope and a plane, which intersect from inside to outside. According to the refractory brick, the problems that an existing refractory brick is relatively rapid in deterioration in the production and operation processes, poor in thermal shock resistance, and short in service life are solved, the overall strength of a refractory brick body is increased, the deterioration rate of the refractory brick is reduced, the thermal shock resistance of the refractory brick is improved, and the service life of the refractory brick is prolonged to over 10,000 hours from below 7,000 hours.

Description

technical field [0001] The invention relates to a refractory brick, in particular to a refractory brick used for the lower part of the expansion joint of a cylinder body of a coal-water slurry gasification furnace. Background technique [0002] For a long time, the refractory brick used in the lower part of the expansion joint of the coal-water slurry gasifier cylinder is composed of two upper and lower refractory bricks directly stacked. The shape of the upper refractory brick is irregular, and the lower refractory brick is L-shaped. There is a connecting surface between the refractory bricks, and the structural shape is not reasonable enough, which leads to the weak bite between the two refractory bricks, which makes the overall strength of the refractory brick body insufficient. After a period of production and operation, the refractory brick will appear to a certain extent. Corrosion, especially the thermal shock generated when the gasifier is turned on and off, can easi...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems and defects of the existing refractory bricks used in the lower part of the cylinder expansion joints of the coal-water slurry gasifier, which occur during production and operation, such as rapid corrosion, poor thermal shock resistance, and short service life. , to provide a refractory brick with good thermal shock resistance and long service life for the lower part of the expansion joint of the cylinder body of the coal-water slurry gasifier

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