Method for preparing carbon black through wet granulation

Abstract

The invention discloses a method for preparing carbon black through wet granulation. The method comprises the steps of splitting decomposition of raw oil, separation of carbon black smoke, granulation and drying, wherein tail gas generated in the splitting decomposition of the raw oil is combusted in a tail gas furnace to provide a heat source for the drying process; the temperature in the drying process is controlled according to the amount of the tail gas supplied to the tail gas combustion furnace of a drier; and the amount of the tail gas supplied to the tail gas combustion furnace of the drier is controlled through a tail gas control program. By adopting the method, product combustion caused by a little over-high temperature during the drying process of the carbon black or package burning caused during a packaging process can be avoided, and disqualification of the moisture in the carbon black caused by over-low temperature can be avoided, so that stable production of qualified granular carbon black is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of chemical industry and relates to a method for preparing carbon black by wet granulation. Background technique [0002] At present, most domestic carbon black enterprises adopt the wet granulation process to produce carbon black. The wet granulation of carbon black is to put powdery carbon black and an aqueous solution containing a certain amount of binder (referred to as granulation water) in the granulator. , A method of forming granular carbon black through the rotation of stirring teeth. After the granular carbon black leaves the granulator, the wet granules must be dried by a rotary kiln dryer with external heating and hot flue gas passing through to supplement the heating. At present, wet granulation still adopts the control system of granulator motor power cascaded to control granulation water, and the moisture content of wet granules is between 35% and 55%, depending on the type of carbon black. ...

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Problems solved by technology

This mode of relying on manual adjustment must not be adjusted in a timely and accurate manner, which will inevitably cause large fluctuations in the temperature of carbon black at the outlet of the dryer.

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