Cement kiln head chimney residual air recycling method and system

Abstract

The invention provides a cement kiln head chimney residual air recycling system. The system is sequentially provided with a scattering rotary drying machine, a spiral conveyor and a transfer storage tank in the conveying direction of cement raw materials, wherein a feeding conveyor is arranged at a feeding port of the scattering rotary drying machine and is used for inputting cement raw materials to be dried into a drying chamber, an air inlet of the scattering rotary drying machine is communicated with a cement kiln head chimney through an air draft pipeline with a valve, an air outlet of the scattering rotary drying machine is sequentially connected to a dust remover and a centrifugal fan through a dust removal air pipe, and an air outlet of the centrifugal fan is communicated with the cement kiln head chimney; the spiral conveyor is connected between the scattering rotary drying machine and the transfer storage tank, receives the dry materials output from a discharge port of the scattering rotary drying machine through the feeding port, and outputs the dry materials into the transfer storage tank through the discharge port; and the transfer storage tank is used for receiving and storing the dry materials conveyed by the spiral conveyor, and the bottom of the transfer storage tank is provided with a discharge tube with an unloader. According to the method and the system, the residual air heat energy is fully recycled, meanwhile, the current situation that the yield and the productivity are influenced due to moisture contained in the cement raw materials is greatly improved, and the consumption of raw coal is reduced.

Description

technical field [0001] The invention relates to a method and system for recovering and utilizing residual wind from a kiln head chimney of a cement kiln. Background technique [0002] The residual wind from the chimney at the kiln head of the cement kiln is the air used for cooling the grate cooler of the cement kiln. It is used for cooling the rear end of the grate cooler. The temperature of this part of the air is low, about 200-450°C, which cannot be used by the cement kiln system. After being purified by the device, it is discharged to the atmosphere as waste gas through the kiln chimney. The kiln head of the cement kiln is equipped with a waste heat boiler production line. After the residual air passes through the boiler for heat exchange, the temperature of the flue gas entering the chimney of the kiln head is generally 110-130°C, and is discharged into the atmosphere through the chimney of the kiln head. The exhausted residual air is exhaust gas, and its composition ...

AI Technical Summary

Problems solved by technology

The moisture carried by such raw materials has a great adverse effect on the operation efficiency, quality control, and production control during the cement production process, and also increases the heat consumed by the system to dry the moisture and increases the consumption of raw coal.

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