Beam-type limekiln

Abstract

The invention provides a beam-type limekiln comprising a limekiln body and a matched system, wherein a preheating zone, a calcining zone, a cooling zone and a discharge hole are arranged in the limekiln body; the calcining zone is provided with an upper burning girder and a lower burning girder; the upper part of the preheating zone is provided with an upper sucking beam, the middle part of the cooling zone is provided with a lower sucking beam, and the middle part of the preheating zone is provided with a high-temperature sucking beam; the outlet of the high-temperature sucking beam is connected to an exhaust gas discharging system by a high-temperature air heat exchanger and / or high-temperature fuel air heat exchanger; the high-temperature sucking beam is utilized to pump parts of smoke heat to exchange heat for fuel gas and / or combustion air so as to improve the temperature of fuel gas and combustion air; calcining temperature is improved to 1450 DEG C from 1050 DEG C, calcining strength is improved, underfiring phenomenon is reduced and avoided, and the quality of lime products can be improved. After the fuel gas of the invention, air and smoke cool lime, air and high-temperature smoke pumped by the high-temperature sucking beam fully exchange heat so as to optimize the heat exchange flow and optimize heat utilization.

Description

technical field [0001] The invention belongs to the technical fields of building materials and chemical machinery, and relates to a kiln for calcining materials, in particular to an improvement of a beam type lime kiln. Background technique [0002] Calcining limestone with beam kiln is a new technology for lime production. The beam type lime kiln has the advantages of low energy consumption, good quality of lime products, strong production capacity, large operating flexibility, etc., and is widely used in lime production for metallurgy, chemical industry and other purposes. The combustion beam is the core equipment of the beam-type lime kiln. The beam body of the combustion beam is equipped with burners, fuel pipelines and combustion-supporting air pipelines. The fuel and combustion air are delivered to the burner through the fuel pipeline and the combustion air pipeline, and the burner evenly distributes the fuel and burns. [0003] The applicant's patent application num...

AI Technical Summary

Problems solved by technology

However, due to the suction effect of the upper suction beam, a large amount of flue gas generated in the calcining zone rises rapidly to the preheating zone to preheat the stone, which reduces the temperature of the calcining zone, weakens the calcination strength of the calcining zone, and still has limestone materials that cannot be burned through. , there will be raw burning, which will affect the quality of calcined products. If fuel is added, it will cause energy waste and heat imbalance.

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