Boiling type material drying method and special boiling kettle thereof

Abstract

The invention provides a boiling type material drying method and a special boiling kettle thereof, and belongs to the technical scheme of drying methods and drying equipment. The boiling type material drying method and the special boiling kettle thereof can increase the utilization rate of a drying space, improve drying intensity and productivity and improve controllability of a drying system. According to the technical scheme, the boiling type material drying method includes the step of arranging of a power device, a measuring and control device and a pipe network, and is characterized in that the boiling kettle is arranged so that materials can be dried in the boiling kettle in a boiling state, and a first material collecting device and a second material collecting device are arranged. The boiling type material drying method and the special boiling kettle thereof are suitable for the technical field of large-scale material drying.

Description

technical field [0001] The invention relates to a boiling material drying method and a special boiling kettle thereof, belonging to the technical field of drying methods and drying equipment. Background technique [0002] The drying operation of materials, such as the drying operation of pulverized coal and (iron) ore powder, etc., is one of the general material pretreatment processes. Currently used drying methods mainly include drum drying and fluidized bed drying. [0003] The main problem that prior art exists is: [0004] 1. For the drum drying method, the materials to be dried, such as pulverized coal and mineral powder, etc., are not in sufficient contact with the drying medium, such as hot air, and the utilization rate of the internal space of the drying drum is not high, seriously Affects the improvement of drying operation productivity. [0005] 2. For the fluidized bed drying method, the air supply conditions match the humidity and particle size of the material...

AI Technical Summary

Problems solved by technology

[0004] 1. For the drum drying method, the materials to be dried, such as pulverized coal and mineral powder, etc., are not in sufficient contact with the drying medium, such as hot air, and the utilization rate of the internal space of the drying drum is not high, seriously Affects the improvement of drying operation productivity

[0005] 2. For the fluidized bed drying method, the air supply conditions match the humidity and particle size of the materials to be dried, such as pulverized coal and mineral powder, etc., in a very narrow range. When the materials to be dried, such as When the initial conditions such as humidity and particle size of pulverized coal and slag fluctuate, especially when the frequency of fluctuation is high, it is very difficult to achieve its ideal working state. Therefore, many fluidized bed systems are abandoned for this reason

[0006] At the same time, limited by the formation conditions of the fluidized bed, the contact between the dried materials, such as pulverized coal and mineral powder, etc., and the drying medium, such as hot air, is still insufficient, and the space inside the fluidized bed system The problem of low utilization rate still exists, which can also seriously affect the improvement of drying operation productivity

[0007] 3. The control of the final moisture of the dried object by the existing drying method is determined by multiple interrelated factors. Therefore, once the initial conditions change, not only the adjustment time of the system is long, but also the adjustment process is very complicated, which affects the system. operational reliability

Images