Micro-deformation self-adaptive inner ring wall structure

Abstract

The invention relates to a micro-deformation self-adaptive inner ring wall structure. The inner ring wall is formed by building a plurality of layers of refractory material building blocks which are arranged in a high direction, the upper surface and the lower surface of the refractory material building blocks are both fold-line-shaped surfaces inclined outwards, the two adjacent refractory material blocks are in occlusion connection through the fold-line-shaped surface and can slide in the radial direction and the circumferential direction of the gas-solid heat exchange type vertical furnace,a grouting hole is formed in the refractory material building block located on the outer side of the inner ring wall, at the position close to one side of the grouting hole, a grouting groove is formed in the joint of the fold lines of two adjacent refractory material building blocks, and a grouting outlet in the bottom of the grouting hole is connected with the grouting groove. According to themicro-deformation self-adaptive inner ring wall structure, the inner ring wall structure can generate micro deformation by virtue of radial slippage and circumferential slippage to counteract the tension of lateral force and thermal expansion, so that the influence of thermal expansion and lateral force on the structural strength of the wall body is effectively resisted, and the service life of the inner ring wall is prolonged.

Description

technical field [0001] The invention relates to a furnace body structure of a gas-solid heat exchange shaft furnace, in particular to a micro-deformation adaptive inner ring wall structure. Background technique [0002] In the furnace body structure of a gas-solid heat exchange shaft furnace such as a CDQ oven, the inner ring wall located in the annular air duct area is prone to damage and outward tilt. The reasons include the following points: 1) When the materials in the furnace fall The impact of the inner ring wall; 2) the lateral force extrusion generated after the furnace is filled with materials; 3) the cracking of the inner ring wall due to thermal expansion during repeated shutdowns for maintenance. [0003] At present, the method of strengthening the structural strength of the annular air duct is often to add a complex groove tongue structure on the wall bricks of the inner ring wall, so that the brick walls are fixed in their respective positions. Although this m...

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Problems solved by technology

Although this method can enhance the integrity of the inner ring wall, it does not solve the stability problem of the inner ring wall in principle. The main reasons are as follows: 1) In the design, the inner ring wall can be simplified The inner ring wall is only fixed at the bottom, because there is a sliding layer at the bottom of the inner ring wall, and the top has no fixing function; 2) The inner ring wall bears the lateral pressure of the filling material in the furnace on the wall, once the wall deforms and tilts outward Then the lateral pressure and material gravity will continue to aggravate the outward inclination of the wall; 3) In the working state, the working temperature of the inner ring wall is as high as 1000°C, and the refractory material of the wall will have a thermal expansion of about 5‰ at this temperature, while When the CDQ oven is shut down for maintenance, the refractory material of the wall will shrink to the original length, and the accumulated shrinkage will be concentrated and released at the weak joints of the bricks, causing the wall to crack, which will not recover automatically and become Weaknesses in the wall where it is more likely to cause flare

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