Lime kiln air inlet system

Abstract

The invention relates to the technical field of steel production and in particular relates to a lime kiln air inlet system which comprises a lime kiln air inlet system, wherein the lime kiln air inletsystem comprises a lime kiln, an air inlet device and a heat exchanger; the lime kiln comprises a kiln body, a lower air sucking beam, a combustion beam and a kiln gas discharge hole; the combustionbeam is provided with a combustion beam burner; a lower air sucking beam waste gas emission hole is formed in the lower air sucking beam; the air inlet device comprises a combustion promotion fan; airintroduced by the combustion promotion fan is subjected to heat exchange with a lower air sucking beam waste gas and a kiln gas and is fed into the combustion beam burner. By adopting the system provided by the invention, requirements of the combustion beam burner on air inlet temperatures can be met, the temperature of the waste gas can meet the requirement on inlet temperatures of a dust collector, no extra temperature adjusting fan for reducing the temperature of the waste gas is needed, and the system is low in cost and free of lime scaffolding.

Description

technical field [0001] The invention relates to the technical field of iron and steel production, in particular to a lime kiln air intake system. Background technique [0002] Lime kiln, as a kind of equipment for calcining limestone at high temperature to form active lime, is widely used in the field of iron and steel smelting production technology. The lime kiln in the prior art generally uses the exhaust gas of the lower suction beam as the inlet air of the combustion-supporting fan and then After heat exchange with the temperature-regulating fan and the waste gas from the kiln body, it enters the combustion beam burner for recycling. In this way, the oxygen content in the gas entering the combustion beam burner is relatively low and contains a certain amount of dust, which is easy to cause lime kiln Periodic suspended materials, namely the formation of lime nodules, not only increases the operating power of the combustion-supporting fan, but also requires an additional t...

AI Technical Summary

Problems solved by technology

[0002] Lime kiln, as a kind of equipment for calcining limestone at high temperature to form active lime, is widely used in the field of iron and steel smelting production technology. The lime kiln in the prior art generally uses the exhaust gas of the lower suction beam as the inlet air of the combustion-supporting fan. After heat exchange with the temperature-regulating fan and the waste gas from the kiln body, it enters the combustion beam burner for recycling. In this way, the oxygen content in the gas entering the combustion beam burner is relatively low and contains a certain amount of dust, which is easy to cause lime kiln Periodic suspended material, that is, the formation of lime nodules, and not only increases the operating power of the combustion fan, but also requires an additional temperature-regulating fan to make the temperature of the exhaust gas meet the requirements of the inlet temperature of the dust collector, which increases the purchase cost and operation. cost

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