Semi-closed self-inert-type vibrating fluidized drying system

Abstract

The invention relates to a semi-closed self-inert-type vibrating fluidized drying system, which comprises an inert gas generation device, a vibrating fluidized drying device, a tail gas dust removal purification device and a tail gas condensation purification device which are connected through pipes, wherein the gas outlet of the tail gas condensation purification device is communicated with the inert gas generation device through a pipe. The safety performance of the drying system provided by the invention is good and the problem of burning or explosion is avoided during drying. Besides, the drying system provided by the invention can solve the problems of high energy consumption, poor drying effect, poor dust removing effect and environmental pollution of the existing drying system.

Description

technical field [0001] The invention relates to a drying system for flammable, explosive or oxidizable materials, in particular to a semi-closed self-inert vibrating fluidized drying system. Background technique [0002] Coal with high water content has low calorific value, and coal drying is an effective way to improve coal quality. At present, the coal drying process used is mainly medium-high temperature gas coal drying technology. The high-temperature gas generated after the hot blast furnace heats the air is mixed with the air to form a medium-high temperature gas (gas temperature is 200 ° C ~ 800 ° C) into the drying equipment, and the medium-high temperature After the mass and heat exchange between the gas and the high-moisture coal is completed, the coal is dried. The hot gas is formed by the induced draft fan to form a negative pressure, flows through the drying equipment and removes the dust in it, and then discharges to the atmosphere. The disadvantage of this p...

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Problems solved by technology

The process of the rotor type forced liquefaction dryer is limited by the limit size of the rotor shaft, etc., and the drying capacity is also the lowest

The disadvantage of the vibrating mixed flow dryer is that the air flow distribution is uneven, multi-layer distribution is required, the volume is large, the airtightness is poor, and the drying rate is low. If the drying temperature exceeds 200 ° C, the dried coal and other materials have the risk of spontaneous combustion

Rotary tube dryer belongs to indirect drying. The disadvantage is that the particle size of the drying material is small, the heat exchange rate between the drying medium and the drying material is low, and the drying capacity is low. The drying medium can only choose saturated steam, and there is also a risk of spontaneous combustion of dry coal and other materials when choosing air.

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