Ventilated material-guide heat balancing device

Abstract

The invention provides a ventilated material-guide heat balancing device, which comprises a box body and a barrel body which passes through the box body and can rotate relative to the box body; the barrel body positioned in the box body is provided with an exhaust port; the surface of the box body is provided with a ventilation opening; and the box body is hermetically jointed with the barrel body. The ventilated material-guide heat balancing device can be combined with a forward drying system or a reverse drying system or the two drying systems for use, and is easy to operate and low in power consumption; and the difference among drying driving forces of different parts in the combined system is smaller and uniform distribution is realized, so that ideal dehydrating and ash removing effects of raw coal can be achieved without too high temperature in the heating process.

Description

technical field [0001] The invention relates to a heat equalization device for ventilation and conduction material, in particular to a heat equalization device for ventilation and conduction material which can be used in combination with a forward drying system or a reverse drying system or both. Background technique [0002] Lignite is a flammable fossil fuel, and lignite resources are very abundant in the world. Compared with other coal types, lignite has high oxygen content, low sulfur content, large changes in ash content and ash melting point, low density, and easy spontaneous combustion. Moreover, lignite has extremely high moisture content, which increases transportation costs and limits the sales radius of lignite. Therefore, it is necessary to remove the moisture in the lignite, and eliminate the risk of spontaneous combustion and explosion after dehydration, so as to improve the quality of lignite. [0003] At present, a forward drying system or a reverse drying s...

AI Technical Summary

Problems solved by technology

The disadvantages of forward drying are: in the final stage of drying, the driving force of drying is reduced to a very small level, and the drying speed is very slow, so the production capacity is low; contact, so the lignite splits, and the coal tar cannot be smoothly adsorbed to the surface of the lignite particles, so it is easy to return water; in order to increase the temperature at the tail of the drying cylinder, the temperature of the hot flue gas is too high, so the safety factor is low

The disadvantages of reverse drying are: the temperature at the entrance is low, and the material with high humidity cannot fully exchange heat with the heat carrier in the previous stage; when the outdoor temperature is low in winter, the dust removal effect of the equipment is poor, the dust is wet, and the pulverized coal combustion capacity Decline; complex operation, high power consumption, high cost, poor continuous production capacity

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