Air-cooling device and method for air-permeable materials

Abstract

The invention relates to the technical field of cooling of breathable materials, and provides an air cooling device and method of the breathable materials. The air cooling device of the breathable material is characterized in that a plurality of layers of material falling plates are arranged, and material falling holes in adjacent material falling plates are in staggered distribution along the projection in the vertical direction, so that the falling height of the materials every time is the height of each material falling chamber, and the problems that the height fall of the materials is large, and the pulverization rate is high are solved. On the basis of the device and method, rakes which move relative to the materials are arranged in the material falling chambers, and the materials are stirred by the rakes to do gathering or scattering motion, so that the strokes of the materials under the same height condition are longer; the materials are in full contact with cooling gas, the cooling time is longer, and therefore the heat exchange efficiency is improved. In addition, the device is vertically arranged, and therefore 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...

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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

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