An external heat preservation device suitable for the high temperature zone of the rotary kiln

Abstract

The invention discloses an external thermal insulation device for a rotary kiln thermal belt. The device comprises lateral thermal insulation walls, two end sealing doors, a triangular rainproof and snowproof thermal insulation sealing ceiling, a fixed support, a bottom thermal insulation wall and a supporting base, wherein the fixed support is of a cuboid structure, the end sealing doors are installed at the two ends of the fixed support, a round hole in a shape matched with the shape of a rotary kiln is formed in each sealing door, the lateral thermal insulation walls are arranged on the two lateral sides of the fixed support, a viewing port made of high-temperature-resistant glass is installed on one lateral thermal insulation wall, the triangular rainproof and snowproof thermal insulation sealing ceiling is arranged on the upper portion of the fixed support, the bottom thermal insulation wall is arranged on the lower portion of the fixed support, and the supporting base is arranged below the bottom thermal insulation wall. The device has the advantages of being simple in structure, convenient to operate, good in thermal insulation effect and remarkable in wind resistance, rain resistance, snow resistance and frost resistance. The device is fixed on a kiln base, can be dismantled when a kiln is overhauled, and is convenient to overhaul and maintain. The device also has the advantages of being long in service life, low in operation and maintenance workload, and low in operation cost.

Description

technical field [0001] The present invention relates to an external heat preservation device, in particular to a rotary kiln (including alumina clinker firing kiln, cement rotary kiln, calcining rotary kiln) high temperature zone (including combustion zone, firing zone, decomposition zone, preheating zone) ) External thermal insulation device. Background technique [0002] In the large-scale industrial production process of alumina, cement, lime, carbon, etc., it is necessary to sinter and roast ores, concentrates, and intermediate products. For example, in the process of non-ferrous and ferrous metallurgy: the production of alumina requires the roasting of clinker and aluminum hydroxide in the production process; the calcination of petroleum coke in the process of carbon production; the calcination of cement clinker in the cement production process; ironmaking During the production of pellets for blast furnace ironmaking, foreign "SL / RN method" and "Krupp method"; chlorina...

AI Technical Summary

Problems solved by technology

At present, there are mainly the following problems: ①The investment is large, which is generally 10-20% higher than that of shaft kiln equipment and infrastructure; ②The steel consumption per unit output is large, generally 30-50% larger than that of shaft kiln; ③Rotation The kiln occupies a large area; ④ consumes a lot of electricity during operation; ⑤ The heat dissipation loss of the kiln skin is large and the energy consumption is high

When no heat-insulating paint is applied to the steel skin outside the kiln, if the refractory material inside the kiln is burnt out and falls off, the steel plate outside the kiln will turn red, and the operator can easily find the problem; After the outer skin is removed, the operator cannot see the actual situation of the steel plate outside the kiln, which is likely to cause safety hazards and affect the normal operation of the rotary kiln; moreover, the high-temperature-resistant heat insulation material is coated on the outer skin of the kiln and operates together with the kiln. Exposure to the sun and rain for a long time will easily peel off and lose the insulation effect

[0006] Based on the above reasons, these two methods of strengthening insulation are difficult to be widely used in actual production

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