Moving bed drying method of materials and device

Abstract

The invention discloses a moving bed drying method of materials and a device. The materials rely on gravity to continuously update heating surface units through distribution from top to bottom, and amoving bed dryer is composed of a heating plate capable of timely guiding out evaporated steam and can adapt to the moisture of different materials and discharge uniformly; through the externally powered mobile heating surface arranged on the upper part or the fixed heating surface with a large transverse distance and a heating way with injection of impact gas, the viscosity of high-moisture materials is overcome, and smooth operation of discharging of the high-moisture materials is ensured; the lower heating surface is set as the fixed heating surface, and the evaporated steam is guided out timely by arranging an evaporated steam guiding-out channel in the space between the upper heating surface unit and the lower heating surface unit to increase the evaporation speed; realization of uniform discharging of the full section of a gravity moving bed is ensured through full-section discharging of the dryer; and moisture reduction and material cooling are promoted by emission and evaporation of discharging of dry materials at the bottom, and the purposes of high-efficiency utilization of energy, improvement of the material drying efficiency and the guarantee of the operating environment are achieved.

Description

technical field [0001] The invention belongs to the technical field of drying and environmental protection, in particular to a moving bed drying method and device for drying coal, mineral powder, grain, chemical raw materials and other materials to reduce moisture. Background technique [0002] In industrial production, there are many unit processes that need to reduce the moisture content of materials, such as drying coal, mineral powder, grain, chemical raw materials and other materials to reduce moisture content. In the drying of these materials, there are many methods widely used in production, such as air flow drying, rotary tube drying, moving bed drying and so on. However, for materials with a large amount of fine powder and a wide particle distribution, airflow drying is likely to cause insufficient drying of large particles and excessive drying of fine particles due to the short gas-solid contact time; In the strong case, the rotary tube drying is easy to cause the...

AI Technical Summary

Problems solved by technology

However, for materials with a large amount of fine powder and a wide particle distribution, airflow drying is likely to cause insufficient drying of large particles and excessive drying of fine particles due to the short gas-solid contact time; In the case of high pressure, the rotary tube drying is easy to cause friction and corrosion of the rotary heating tube due to the high relative speed between the rotary tube and the material, resulting in the problem of high equipment cost; although the traditional moving bed can better relieve the air drying and The problem of rotary tube drying, but often the drying efficiency is relatively low, especially the lack of renewal of materials and heating surfaces, the evaporation steam is not exported in time, resulting in low drying efficiency, and when entering high-moisture materials, Blockage and poor descending will seriously affect the normal operation of the equipment, and the uneven discharge of large-scale drying equipment often directly affects the balanced feeding and normal operation of the moving bed. The adaptability and uniform discharge have become important issues for the stable operation of industrialized devices

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