Cyclone preheater for granular materials

Abstract

The invention relates to a cyclone preheater for granular materials. The cyclone preheater comprises a first-stage cyclone cylinder, a second-stage cyclone cylinder, a third-stage cyclone cylinder, a fourth-stage cyclone cylinder and a hot blast stove, wherein one side of the top of the first-stage cyclone cylinder communicates with the top of the second-stage cyclone cylinder through a first connecting air pipe, one side of the top of the second-stage cyclone cylinder communicates with the top of the third-stage cyclone cylinder through a third connecting air pipe, one side of the top of the third-stage cyclone cylinder communicates with the top of the fourth-stage cyclone cylinder through a second connecting air pipe, one side of the top of the fourth-stage cyclone cylinder is connected with a decomposing furnace through a material guide pipe, the bottom of the decomposing furnace communicates with an air conveying opening of the hot blast stove through a pipeline, and the decomposing furnace communicates with the bottom of the third-stage cyclone cylinder. According to the cyclone preheater for granular materials, limestone particle materials are preheated and decomposed step by step through the connecting air pipes and the preheating cyclone cylinders, the heat exchange efficiency is improved, the heat energy utilization rate can be increased, secondary processing is avoided, the power consumption and coal consumption of the system and the equipment investment cost are reduced, and the repair and maintenance workload is reduced.

Description

Technical field[0001]The present invention relates to the field of lime burnning, in particular, to a cyclone preheater for lime burn into a particulate material.Background technique[0002]Currently in the lime burnning system, it is generally a block lime burning system and a powdered lime burning system. In the smelting industry, the requirement to use lime is 0.5 to 5 mm particles. The finished product of the powdered lime burning system is lime powder and cannot be used in the smelting industry. Blocking lime burning system, the finished product is a block lime, and the secondary crush sort can be used. In the process of blocking lime, in order to ensure limestone decomposition rate, enter the burnt system from limestone to the finished lime, limestone will take about 1 hour, heat exchange efficiency, and the power consumption of the system. Coal consumption is relatively high.[0003]Therefore, how to make the lime burning system, better heat exchange, improve thermal energy utili...

AI Technical Summary

Problems solved by technology

In the burning process of block lime, in order to ensure the decomposition rate of limestone, it takes about 1 hour for the limestone to stay in the system from the time the limestone enters the burning system to the time when the finished lime comes out. The heat exchange efficiency is poor, and the power consumption of the burning system, Coal consumption is relatively high

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