Cooling method of cracked carbon black

Abstract

The invention provides a cooling method of cracked carbon black. The cooling method comprises the following steps that a rubber substance is cracked from a cracking furnace to generate carbon black, and the carbon black falls into a carbon black discharging screw conveyor at a temperature of 400-450 DEG C, is cooled by the carbon black discharging screw conveyor and sent out, wherein an upward overflow port is arranged on the carbon black discharging screw conveyor; and finally the carbon black overflows from the overflow port and falls into a conveying main pipe, so that the carbon black is cooled in an oxygen-free state, wherein the temperature of the carbon black is 120-140 DEG C when the carbon black is conveyed to the overflow port, spraying cooling is further performed in the processthat the carbon black falls into the conveying main pipe from the overflow port, and the temperature of the carbon black is 40-60 DEG C when the carbon black enters the conveying main pipe. Accordingto the invention, overflow cooling treatment is carried out on carbon black conveying, so that secondary combustion of carbon black caused by the fact that air enters the carbon black discharging screw conveyor is avoided; and the carbon black is cooled and dedusted by water mist in the overflowing and falling process, so that the carbon black can be evenly humidified and rapidly cooled, flying dust is reduced, and the hidden danger of spontaneous combustion, powder explosion and the like in the output process is avoided at one stroke.

Description

technical field [0001] The invention relates to the technical field of cracking carbon black treatment, in particular to a cooling method for cracking carbon black. Background technique [0002] The rubber enters the cracking furnace and starts to crack when heated during the propelling process, producing cracked gas and carbon black. The cracked gas is cooled by an oil absorption tower and a tube-and-tube heat exchanger to become a liquid and non-condensable gas. The carbon black passes through a shafted The discharge screw is sent to another shaftless screw conveyor for packaging. Normally, the carbon black from several pyrolysis production lines is brought into the same conveying main pipe for packaging. When the carbon black falls from the pyrolysis furnace to the carbon black discharge screw machine, the temperature is about 420°C. When the machine falls into the conveying main pipe through the spray channel, the temperature is lowered and humidified. When entering the...

AI Technical Summary

Problems solved by technology

Normally, the carbon black from several pyrolysis production lines is brought into the same conveying main pipe for packaging. When the carbon black falls from the pyrolysis furnace to the carbon black discharge screw machine, the temperature is about 420°C. When the machine falls into the conveying main pipe through the spray channel, the temperature is lowered and humidified. When entering the conveying main pipe, the temperature is about 100-120°C. In this way, there are two hidden dangers during transportation and packaging. First, during the conveying process of the main conveying pipe, The carbon black produced by several cracking furnaces is imported into this conveying main pipe, and there are several interfaces on the conveying main pipe. In order to avoid the carbon black floating out during the conveying process, the system is equipped with an induced draft fan, and outside air enters the system. Due to the fine and dry carbon black particles that cause dust, there is a hidden danger of dust explosion, and the air easily enters the carbon black discharge screw machine to make the carbon black secondary combustion, which cannot achieve the purpose of cooling; natural phenomenon

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