Planar type multi-level material extra-kiln preheating decomposition device for rotary kiln

Abstract

The invention relates to a planar type multi-level material extra-kiln preheating decomposition device for a rotary kiln. The planar type multi-level material extra-kiln preheating decomposition device comprises a rotary kiln. The feeding end of the rotary kiln is connected to an air inlet in the upper portion of a first preheating cyclone separator through a first air guiding pipe. A dischargingopening in the bottom of the first preheating cyclone separator is connected to the feeding end of the rotary kiln through a first discharging pipe. A second preheating cyclone separator is arranged at one side of the first preheating cyclone separator. A discharging opening in the bottom of the second preheating cyclone separator is connected to the first air guiding pipe through a second discharging pipe. An air inlet in the upper portion of the second preheating cyclone separator is connected to an air outlet in the top of the first preheating cyclone separator through a second air guidingpipe. A first discharging pump is arranged on the second discharging pipe. An air outlet in the top of the second preheating cyclone separator is connected to a dust remover through a dust removal airguiding pipe. A feeding opening is formed in an air guiding pipe on the preheating cyclone separator at the terminal end. By means of the planar type multi-level material extra-kiln preheating decomposition device, calcination efficiency is improved; the energy is saved; waste of materials and heat is reduced; and the mounting cost is greatly lowered.

Description

technical field [0001] The invention relates to a multi-stage material kiln preheating and decomposition device for a planar rotary kiln, in particular to a magnesium oxide production and manufacturing device, including magnesium hydroxide, magnesite powder, hydromagnesite powder, magnesium carbonate, etc. Raw materials are calcined by this device to produce magnesium oxide products. Background technique [0002] Rotary kiln refers to rotary calcining kiln, which belongs to the category of building materials equipment. Rotary kiln can be divided into cement kiln, metallurgical chemical kiln and lime kiln according to different materials. Cement kilns are mainly used for calcining cement clinker, which can be divided into two categories: dry production cement kiln and wet production cement kiln. Metallurgical and chemical kilns are mainly used for magnetization roasting of lean iron ore in iron and steel plants in the metallurgical industry; oxidative roasting of chromium a...

AI Technical Summary

Problems solved by technology

However, the temperature of the flue gas at the kiln tail is as high as about 800°C, so it cannot directly enter the bag filter to be filtered and emptied.

In order to lower the temperature, a large amount of cold air is usually distributed through the air distributor to force the temperature to drop, which can cause a lot of energy loss and waste and increase the area of ​​the dust collector, and the filtration cost is very high

[0004] It is possible to stack multiple groups of preheating cyclone separators upwards to recycle heat, but in this way, the height of the overall equipment will be as high as ten meters or even higher, the installation cost is high, and the feed height is too high, resulting in Feeding is very difficult

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