Sleeve type shaft kiln with power generation device

Abstract

A sleeve type shaft kiln with a power generation device comprises a waste heat boiler, a carbon dioxide processing unit, the power generation device, a material supply device, an air supply system and a fuel supply system. A cooling zone of a kiln body is provided with a lower suction beam. The kiln body is internally provided with a combustion chamber, the combustion chamber has a cylinder structure, and the combustion chamber and the kiln body form an annular space. The upper part of the combustion chamber has a frustums structure, the top of the frustums is provided with a burn nozzle, and the side face of the frustums is provided with a secondary air inlet. The lower part of the combustion chamber is communicated with the waste heat boiler through a flue gas channel. A decomposition gas outlet is connected with the carbon dioxide processing unit through a draught fan, an outlet of the lower suction beam is connected to the secondary air inlet or an inlet of the draught fan, and an inlet of a cooling fan is connected with the carbon dioxide processing unit or is communicated with the atmosphere. A material in the kiln body is heated by heat conduction brick masonry in a flame isolation mode, so that the quality of the calcined product is improved, high-purity carbon dioxide is recycled, waste heat is used for power generation, thermal energy resources are fully utilized, and the comprehensive economic benefits of a lime kiln are increased.

Description

technical field [0001] The invention belongs to the technical field of industrial furnaces and kilns, and relates to a sleeve-type shaft kiln with a power generation device. 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 the waste heat of the flue gas can reduce e...

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.

Images