Suspended cylinder type parallel flow heat storage double hearth kiln

Abstract

The invention relates to a suspended cylinder type parallel flow heat storage double hearth kiln which comprises a double hearth kiln body, feeding equipment, discharging equipment, an air supply system and an exhaust gas discharging system, wherein the double hearth kiln body consists of upper inner furnace walls and lower outer furnace walls, and each inner furnace wall is suspended on the corresponding outer furnace wall; the double hearth kiln body is internally provided with a pre-heating zone, a calcining zone and a cooling zone; the cooling zone is provided with supporting walls which are built by fireproof bricks, and the supporting wall of each hearth is circularly distributed along the corresponding outer furnace wall; a supporting arch is arranged on the upper part of each supporting wall and is lapped between two adjacent supporting walls, the inner furnace walls is suspended and installed on the supporting arches, and the supporting walls have a supporting effect on the inner furnace walls. According to the suspended cylinder type parallel flow heat storage double hearth kiln disclosed by the invention, the supporting walls are uniformly arranged inside the outer furnace walls along the circumference and the inner furnace walls are supported by the supporting walls and the supporting arches arranged on the supporting walls, so that the double hearth kiln is more firm in integral structure and a flue channel is difficult to damage, and thus the operating safety of the double hearth kiln is improved and the production period and the service life are favorably prolonged.

Description

technical field [0001] The invention belongs to the technical field of chemical building material production equipment, and relates to an industrial furnace, in particular to a double-chamber kiln with a suspended cylinder type parallel flow heat storage. Background technique [0002] Double-chamber kiln is also called double-chamber parallel-flow regenerative lime kiln. The fuel enters from the upper end of the calcination belt and flows in parallel with the raw materials. Since the fuel is injected from the upper part of the calcination zone, the raw material can absorb most of the heat released by the fuel here, and the average temperature of the calcination zone is 950°C. Another important feature of double-chamber kiln is heat storage, which uses heat storage to preheat part of the combustion air. The thermal characteristics of co-current calcination and counter-current thermal storage determine that the double-chamber kiln has high thermal efficiency, and its thermal ...

AI Technical Summary

Problems solved by technology

The main problem of the corbel-supported parallel flow regenerative double-chamber kiln is that the thermal shock stability of the masonry magnesia bricks is poor, and the coefficient of thermal expansion is large, which is easy to cause cracks in the brick body during the kiln drying process, which affects the operation safety and service life.

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