Methods and machinery for calcining materials

Abstract

The invention provides a method and machine for calcining materials, including: feeding equipment, a preheating chamber, a calcining chamber, a cooling chamber, a discharging device and an exhaust gas discharge system. The calcining chamber is provided with 1 to 10 rows of peripheral burners for preheating The chamber and the cooling chamber are arranged horizontally. The preheating chamber and the cooling chamber are respectively divided into a high temperature preheating chamber and a low temperature preheating chamber, a high temperature cooling chamber and a low temperature cooling chamber by partition walls. The materials in the preheating chamber and cooling chamber move laterally under the push of the pusher mechanism, the higher temperature air after cooling the product in the high temperature cooling chamber is used as combustion air, and the high temperature air after cooling the product in the low temperature cooling chamber preheats the air in the preheating chamber limestone material. The invention makes full use of heat energy, saves heat exchange equipment, and reduces equipment investment and operating costs. Reducing greenhouse gas emissions is conducive to environmental protection. The machine is a detachable component, and each component equipment is manufactured separately and assembled on site, which is convenient for transportation, installation, maintenance and replacement, and is conducive to serial production of calcining machines.

Description

technical field [0001] The invention relates to a method and equipment for calcining materials, in particular to a method and an assembled machine for making full use of the high-temperature air after cooling lime as combustion-supporting air and preheating the materials to be processed. Background technique [0002] Lime is an important building material, and also an important raw material in metallurgy and chemical industry. The prior art uses dolomite and limestone as raw materials, and adopts a vertical kiln with burning beams to calcinate lime. The disadvantage of this process is that the direction of the furnace gas flow in the shaft kiln is opposite to that of the stone material, that is, the stone material moves from top to bottom, and the furnace gas flows from bottom to top. Gas segregation phenomenon causes limestone to be heated unevenly and affects product quality. The applicant disclosed a utility model patent with the patent number ZL200320111077.3 for an int...

AI Technical Summary

Problems solved by technology

The disadvantage of this process is that the direction of the furnace gas flow in the shaft kiln is opposite to that of the stone material, that is, the stone material moves from top to bottom, and the furnace gas flows from bottom to top. Gas segregation phenomenon causes uneven heating of limestone and affects product quality

However, this patent application requires the indirect use of waste heat through the heat exchange of the regenerator in the regenerator, which increases equipment investment and operating costs on the one hand, and increases exhaust gas emissions on the other hand, which is not conducive to environmental protection.

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