Energy-saving automatic material overturning lime calcining kiln

Abstract

The invention relates to the technical field of industrial furnaces, and particularly relates to an energy-saving automatic material overturning lime calcining kiln which comprises a kiln body, and a discharge device installed at the bottom of the kiln body. The lime calcining kiln is characterized in that the kiln body has three sections, wherein the upper section is a waste gas outlet section, the middle section is a sintering section, and the lower section is a discharge section; the sintering section also comprises a preheating zone, a burning zone and a cooling zone; the inner wall of the waste gas outlet section has a cone-shaped necking structure, the included angle alpha between the conical surface of the cone-shaped necking structure and the center line is 15 degrees + / -1 degree; the diameter difference between the large opening and the small opening of the waste gas outlet section is 1000+ / -200mm; the sintering section is of a cylindrical structure; the inner wall of the discharge section is of an inverted cone-shaped necking structure, the included angle beta between the conical surface of the inverted cone-shaped necking structure and the center line is 30 degrees + / -2 degrees, the diameter difference between the large opening and the small opening of the discharge section is 1600mm+ / -400mm, and the diameters of the large opening ends at the inner walls of the waste gas outlet section and the discharge section are equal to the inner diameter of the sintering section. By adopting the energy-saving automatic material overturning lime calcining kiln, such problems of traditional shaft kilns as high heat consumption and high investment, short service life of the kiln lining, and poor quality of the finished product lime are solved, and the kiln is mainly used for lime production.

Description

technical field [0001] The invention relates to the technical field of industrial kilns, in particular to an energy-saving automatic lime calcining kiln. Background technique [0002] A lime shaft kiln is usually divided into a waste gas outlet section, a firing section and a discharge section, and the firing section is further divided into a preheating zone, a calcination zone, and a cooling zone (arranged from top to bottom). The three sections of the traditional lime shaft kiln are integrated into a straight cylindrical structure. The straight cylindrical kiln furnace material drops to a static level and falls steadily. The upper and lower air flow rates in the pre-tropic zone, calcination zone and cooling zone are the same. The waste gas is not quickly sucked away in the pre-tropical zone, and the high-temperature lime is not cooled quickly in the cooling zone. In this way, the temperature of the exhaust gas exiting the kiln is generally between 200°-400° During the per...

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to solve the problems of high heat consumption, short kiln lining life and poor quality of finished lime in traditional lime shaft kiln, and to provide an energy-saving automatic lime calcining kiln

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