A sleeve lime kiln with high and low combustion chambers

Abstract

The invention belongs to the technical field of sleeve lime kilns, and in particular relates to a sleeve lime kiln with combustion chambers distributed in different heights. The sleeve lime kiln with high and low combustors in random distribution includes a lime kiln shell, an induced draft fan, a feed system, a kiln body sleeve, a kiln body outer sleeve, a combustion chamber group, an annular air cooler, an ash discharge unit and Finished Ash Bin. The inner and outer combustion chamber groups include burners at the input ends of the inner and outer combustion chambers. The sleeve in the kiln body and the outer sleeve of the kiln body are coaxially socketed to form an annular kiln chamber. The inner combustion chamber group is fixed on the side wall of the kiln body sleeve, and the outer combustion chamber group is fixed on the side wall of the outer sleeve of the kiln body. The induced draft fan and the feeding system It is fixed on the top of the lime kiln shell from top to bottom, and the lower part of the lime kiln shell is fixed on the ash unit, annular air cooler and finished ash bin from top to bottom. The inner combustion chamber group is higher than the outer combustion chamber group, the burner and the combustion chamber are sealed and connected, and a slight positive pressure is maintained in the combustion chamber, which improves the decomposition degree of limestone and the production efficiency of lime.

Description

technical field [0001] The invention relates to the technical field of sleeve lime kilns, in particular to a sleeve lime kiln with combustion chambers distributed in different heights. Background technique [0002] With the rapid development of industry, lime, as a basic raw material in the fields of building materials, metallurgy and chemical industry, has an increasing demand. The principle of lime preparation is to use high-temperature calcined limestone, and the limestone is decomposed into lime with CaO as the main component. At present, vertical kilns with a relatively small footprint are generally used to produce lime. Among them, the sleeve-to-lime kiln has been widely used in recent years because of its low cost. [0003] The Chinese patent with the authorized notification number CN103641338A discloses a counter-fired sleeve lime kiln. The patent adopts an inner and outer counter-fired combustion chamber group, so that the inner and outer combustion chamber groups ...

AI Technical Summary

Problems solved by technology

Due to the relative arrangement of the inner combustion chamber group and the outer combustion chamber group, the path length of the flue gas injected from the inner and outer combustion chamber groups to the annular kiln chamber is the same in the annular kiln chamber, so that the different particle sizes distributed in different positions of the annular kiln chamber The heating time and heating temperature of the limestone are also the same. When the limestone with a smaller particle size is fully decomposed, the limestone with a larger particle size is not completely decomposed, resulting in a lower decomposition degree of the limestone with a larger particle size, which reduces the lime production efficiency.

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