Mechanical dispersion fluidization drying method and equipment for coal slime

Abstract

The invention relates to a mechanical dispersion fluidization drying method and equipment for coal slime. The method is used for realizing fluidization drying of coal slime particulates by using hot smoke while dispersing coal slime to be dried into the coal slime particulates. The drying method is high in heat utilization rate and yield as well as wide in application range. The equipment comprises a drying box body and a stirring shaft, wherein the drying box body is provided with a feeding hole, a discharging hole, a gas outlet and a smoke inlet; the stirring shaft is used for dispersing the coal slime to be dried, is arranged at the bottom of the drying box body and is located above the smoke inlet; the coal slime to be dried is dispersed into the coal slime particulates by using the stirring shaft after entering the drying box body through the feeing hole, meanwhile, the hot smoke enters from the smoke inlet at the bottom of the drying box body at a proper flow rate and is discharged from the gas outlet after carrying out fluidization drying on the coal slime particulates, and at the same time, the dried coal slime is output from the discharging hole. The equipment is large in gas and solid drying contact area, long in drying time, high in heat utilization rate and yield and small in floor area.

Description

Technical field [0001] The invention relates to coal slime drying technology, in particular to a method for mechanically dispersing and fluidizing coal slime and equipment for realizing the method. Background technique [0002] There are many domestic drying processes and equipment. In the field of coal slime drying, there are three main categories: slime drum drying process, tunnel drying process (including flap dryer and mesh belt dryer) and airflow drying process. [0003] (1) Drum drying process [0004] Drum dryer is one of the earliest drying equipment. It is not only used for drying coal, but also has been widely used in metallurgy, building materials, chemical industry and other fields. The main body of the drum dryer is a cylindrical body with an inclination (0~5°) and can rotate. The wet material is added from the upper part of one side, and the hot drying medium (hot air, flue gas) flows through in parallel. The cylinder rotates slowly and moves from the higher end to t...

AI Technical Summary

Problems solved by technology

[0015] But for viscous materials, airflow drying cannot be used directly

[0016] In summary, the existing coal slime drying technology has the disadvantages of low heat utilization rate, high equipment cost and weak applicability

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