Beam type heat storage lime kiln

Abstract

The invention relates to a beam type heat storage lime kiln. The beam type heat storage lime kiln comprises a kiln body, a feeding system, an air supply system, a discharging system, a cyclone dust collector, a bag-type dust collector, a draught fan, two heat accumulators with burners, a waste gas discharging system and a control system, wherein an outlet of a lower suction beam is connected into an inlet of the draught fan through the cyclone dust collector and the bag-type dust collector; an outlet of the draught fan is divided into two paths which are respectively connected into a combustion air inlet of a combustion beam through valves and the heat accumulators; a gas pipeline and an air pipeline are connected to the burners of the heat accumulators; and waste gas outlets of the heat accumulators are respectively connected to the waste gas discharging system through three-way valves; and the two heat accumulators are used for alternatively accumulating heat and preheating gases, and the reversing operation is realized through the opening and closing of each valve. The beam type heat storage lime kiln has the advantages that the high-temperature gases pumped out by the lower suction beam are dedusted, purified and preheated by the cyclone dust collector, the bag-type dust collector and the heat accumulators to serve as the combustion air, the burning temperature of a low-heat value fuel is increased, the full utilization of the low-heat value fuel is facilitated, and the quality of calcined products is improved.

Description

technical field [0001] The invention belongs to the technical field of building materials and chemical production equipment, and relates to a lime kiln, in particular to a beam type heat storage 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. Calcination requires fuel to be burned in the calcination zone to release heat to heat the material to be calcined. The decomposition temperature of limestone is about 900°C, and the calcination temperature is generally 1000-1200°C. In order to reach the calcination temperature and produce qualified lime, fuel with a certain calorific value is required. The calorific value of the fuel is low, the combustion cannot ...

AI Technical Summary

Problems solved by technology

This patent application uses the preheated cooling air as the combustion air, which increases the combustion temperature, but does not preheat the fuel gas, and it still needs to add coal powder or coke powder with high calorific value during the combustion process

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