Shaft kiln capable of heating material through dividing wall

Abstract

The invention relates to a shaft kiln capable of heating a material through a dividing wall. The shaft kiln comprises a waste heat boiler, a generating set, a kiln body, a draught fan, a cooling fan, feeding equipment, an air supply system and a fuel supply system, wherein the kiln body is provided with a feeding hole, a discharging hole, a decomposed air outlet, a cooling air inlet and a cooling air outlet; a combustion chamber is arranged in a heating zone; a combustor is arranged at one end of the combustion chamber and the other end of the combustion chamber is communicated with the waste heat boiler; a baffle is arranged between the heating zone and a cooling zone; the baffle is of a conical platform structure; a material lock is arranged at the lower part of the conical platform; a steam pipe coil is arranged on the waste heat boiler and connected to the generating set; the decomposed air outlet is connected with a carbon dioxide treatment unit through the draught fan; the cooling air outlet is connected to a secondary air inlet or the inlet of the draught fan; and the inlet of the cooling fan is connected with the carbon dioxide treatment unit or communicated with the air. By heating the material inside the kiln body in a flame isolation manner through use of heat conducting brick masonries, improvement of the quality of a roasted material can be facilitated, high-purity carbon dioxide can be recycled and energy consumption of a lime kiln can be reduced.

Description

technical field [0001] The invention belongs to the technical field of industrial furnaces and kilns, and relates to an industrial shaft kiln, in particular to a shaft kiln with partition walls for heating materials. Background technique [0002] Lime kiln waste heat recovery and utilization can save energy consumption, reduce lime production costs, and reduce pollutant emissions at the same time. Lime kiln is a large-scale high-energy-consuming device. With the rapid development of the national economy, the waste heat of industrial furnaces is very rich and has great potential for utilization. The iron and steel industry, calcium carbide industry, alumina industry and refractory material industry are major lime consumers. The rapid growth of the above industries has driven the rapid development of lime kilns. During the production process of large-scale active lime production line, the flue gas discharge temperature is high, about 240-260°C. Effective use of this part of ...

AI Technical Summary

Problems solved by technology

The carbon dioxide produced by the decomposition of limestone is a valuable resource. Since the decomposed carbon dioxide is mixed with the combustion flue gas, it is not conducive to the recovery and utilization of carbon dioxide.

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