Slewing drum shaped multi-pipe drying mechanism and its use in drying water-containing lignite

Abstract

The invention provides a rotary drum-type multi-tube dryer which can dry water-containing brown coal or other water-containing materials. The drying of the materials in the dryer is safe, reliable and efficient. The dryer mainly comprises a feed inlet, a coal-particle distributor, a high-efficiency heat-transfer internal part of a tube bundle, a dryer with build-in spiral guide vanes, a tube-typesteam distributor, a rotary drum-type outer cylinder, a sealing of the rotary drum-type outer cylinder, a driver of the rotary drum-type outer cylinder, a stepless speed regulator, an inclination adjustor of the rotary drum-type outer cylinder, an electric motor, an explosion-proof gas control system, a steam addition system, a condensing-liquid reclamation device, a gaseous dust reclamation device and a support piece. Brown coal (or other water-containing materials) with the water content of 15 wt percent to 50 wt percent and the coal particle size smaller than 6.3 mm can be dried into moulded coal with the water content equal to or smaller than 8 wt percent or powder coal with the water content equal to or smaller than 3 wt percent by the dryer.

Description

A rotary drum multi-tube drying device and its application in drying lignite rich in water technical field The invention relates to a drying process and drying equipment for materials with high water content, in particular to the drying of lignite with a water-rich content of 15wt%-50wt% and the multi-tube drying device in the shape of a rotary drum used to improve the subsequent use of water-rich coal after drying economic value and environmental protection social benefits. Background technique Water-rich lignite is a coal with a low degree of coalification. It is characterized by moisture content of 15wt%-50wt%, large porosity, high volatile matter, low calorific value, high oxygen content of 15wt%-30wt%, and strong chemical reactivity. The thermal stability is poor, and the lump coal is severely broken when heated. Contains different amounts of humic acid. Based on the dry ash-free basis in different coal-forming periods in China, the humic acid content is 38.67% in th...

AI Technical Summary

Problems solved by technology

Therefore, the traditional drying technology is not suitable for the drying of lignite rich in water

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