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In solving the boiler's adaptability to coal types and loads, based on the minimum stable combustion load required by the boiler and the characteristics of coal quality, an adjustable tamper-resistant belt based on two-layer or three-layer insulation board stacking structure was proposed.
Each set of adjustable tamper-proof belt device is mainly composed of three layers of inner, middle and outer heat insulation boards. Each heat insulation layer is composed of a microporous ceramic heat insulation board that adopts an embedded method and a heat-resisting steel structure to form an integrated heat insulation board. .
The ceramic insulation board ceramic fiber paper is directly exposed to the flame, and the steel structure is welded by the heat-resistant flat steel or angle steel and is not directly affected by the flame. The ceramic heat shield plate is processed into a smooth plane toward the fire side and a microporous structure layer on the back fire side. The hole density can be controlled between 0.5 and 2.0 mm by the foam manufacturing process.
Because of the embedded structure, the ceramic heat shield is not affected by external forces under normal circumstances, so its strength requirements are not high. The gravity of the whole insulation layer and the frictional resistance during movement are borne by the steel structure of the insulation layer. Therefore, the design requirements of the whole adjustable flammability band ensure that: the steel structure of each active insulation layer under the working conditions in the furnace The actual operating temperature does not exceed the upper limit of its allowable long-term operating temperature and requires sufficient strength margin.
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