Air-cooling device and method for air-permeable materials

Abstract

The invention relates to the technical field of cooling of an air-permeable material and provides an air-cooling device and method for an air-permeable material. According to the air-cooling device for the air-permeable material, multiple layers of material storage barrels are arranged, and discharging holes in bottom plates of the adjacent material storage barrels are distributed in a manner that the projections of the discharging holes in a vertical direction are staggered, so that the height that the material drops each time is the height of each material storage barrel, and the problems of large material height difference and high pulverizing rate are solved. On the basis, material rakes making relative motion with the material are arranged in the material storage barrels, and the material is gathered or dispersed under the agitating action of the material rakes, so that the stroke of the material is longer under the condition of the same height, the material is in full contact with cooling gas, the cooling time is longer, and accordingly, the heat exchange efficiency is improved. Moreover, the device is vertically arranged, so that the occupied area is small.

Description

technical field [0001] The invention relates to the technical field of cooling materials with air permeability, in particular to an air cooling device and method for air permeable materials, more specifically an air cooling device and method suitable for direct reduced iron. Background technique [0002] The iron and steel industry is a pillar industry of the national economy. It consumes a lot of energy and discharges a lot of pollutants. While providing high-quality steel to the society, it also has a major impact on the natural environment. Among them, the energy consumption and waste discharge of iron and steel enterprises are mainly concentrated in the blast furnace ironmaking system, so people have carried out a lot of research on new non-blast furnace ironmaking technology and made some progress. Among them, the most rapid development is direct reduction technology and smelting reduction technology. [0003] Among them, direct reduction technology refers to the ironm...

AI Technical Summary

Problems solved by technology

In addition, both water immersion cooling and internal spray cooling cylinder cooling have problems such as high pulverization rate, low yield, high water content, secondary drying, and secondary oxidation.

External spray water cooling cylinder cooling Since the cooling medium conducts heat exchange through the cooling cylinder wall, the heat exchange rate is relatively low, a large amount of cooling water is consumed, and energy consumption is high

And based on these three kinds of method technical personnel put forward the multiple direct reduced iron cooling device also all has the defective based on above-mentioned method to cause

Moreover, the above three methods all have the problem of being unable to utilize waste heat

Images