White carbon black drying system using fire coal circulating fluid bed hot-air furnace

Abstract

The invention relates to a white carbon black drying system using a coal-fired circulating fluid bed air heating furnace, which comprises a circulating fluid bed air heating furnace system that is provided with a heat exchange surface in the furnace for controlling combustion temperature and co-producing steam, a flue gas reverse-flow system used for regulating the flow rate of the flue gas of a hot air heat exchanger and recovering the waste heat and a white carbon black sizing agent drying system used for exchanging the heat of clean air and the hot air heat exchanger and recovering the heat of tail gas of a dryer. The invention takes coal as fuel, the fuel is low in cost and wide in source, and multiple systems can be used for recovering and utilizing heat energy, so that the thermal efficiency is high, the energy consumption is low, the drying effect of the white carbon black is good, and the service life of the air heating furnace and the heat exchanger is long.

Description

technical field [0001] The invention relates to a drying system, in particular to a white carbon black drying system using coal as fuel and adopting a fluidized bed hot blast stove. Background technique [0002] The traditional silica drying process is basically divided into two types. One is to burn clean fuels such as oil and gas in a combustion furnace. The hot air after combustion directly enters the dryer, or directly uses electric heating. Heating the silica slurry produces the desired product. This process has the disadvantage of high fuel cost, and oil shortage is a global energy crisis, which is not conducive to energy conservation and environmental protection. [0003] Another process uses coal as fuel, burns in a combustion furnace, and exchanges heat through a heat exchanger to generate clean hot air. The clean hot air enters the dryer to heat the white carbon black slurry to produce the desired product. The primary air is discharged after dust removal by the d...

AI Technical Summary

Problems solved by technology

Furnace thermal efficiency is not high due to excessive air excess coefficient

There is no heat exchange surface in the furnace, and the temperature in the furnace is high, resulting in short service life of the furnace wall and heat exchanger

If a fluidized bed combustion furnace is used, the operability of the combustion furnace is not good, and the furnace temperature is not easy to control

The dust collector cannot be arranged in the furnace, and the circulating fluidized combustion of the ash cannot be realized, so that the carbon content of the fly ash is high and the combustion rate of the fuel is low

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