Process for producing soft carbon black by oil furnace method hard reaction furnace

Abstract

The invention discloses a process for producing soft carbon black by using an oil furnace method hard reaction furnace, which comprises the following steps of: injecting fuel into a hard furnace combustion chamber to be mixed with high-temperature air for combustion, setting the fuel quantity according to a combustion model at 1550-1700 DEG C, and simultaneously injecting sufficient stable steam to form high-temperature high-speed airflow meeting the generation condition of the soft carbon black together with combusted gas; radially spraying the raw oil meeting the air-oil ratio condition into a throat pipe of a reaction furnace and is mixed with the high-temperature and high-speed air flow, then rapidly carrying out a series of chemical reactions such as incomplete combustion and cracking to generate the carbon black fume; after proper reaction time, spraying quenching water into a quenching section of the reaction furnace to stop the reaction to prepare the soft carbon black. According to the process, steam is introduced into the combustion chamber, so that the furnace temperature is adjusted to a proper temperature, the gas flow rate in the hearth is increased, the air-oil ratio is improved, coking is not easy to form in the furnace, and continuous production is ensured. The process can be applied to an oil furnace method hard carbon black production line with annual output of 20,000 tons or more.

Description

technical field [0001] The invention relates to the technical field of carbon black production, in particular to a process for producing soft carbon black in an oil furnace method hard reaction furnace. Background technique [0002] Carbon black is the product of hydrocarbon substances in oxygen-deficient combustion. If the air-oil ratio is high and the oxygen deficiency is less, the carbon black produced is hard carbon black. On the contrary, the air-oil ratio is low and the oxygen deficiency is more, and the carbon black produced is soft carbon black. . However, the low air-oil ratio is likely to cause coking in the furnace, which makes the production unsustainable. At the same time, the low air-oil ratio will also cause incomplete reaction of raw material oil, which will cause excessive oil film on the surface of carbon black and affect the quality of carbon black. Therefore, in order to produce soft carbon black normally, only a special soft reaction furnace can be used...

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Problems solved by technology

[0003] Since the usage of soft carbon black only accounts for about 25% of the usage of hard carbon black, for small and medium-sized enterprises to specialize in the construction of soft carbon black production lines, they will face the problem of balancing the market and benefits. In order not to lose the soft carbon black In the current market, many enterprises can only build two reaction furnaces, hard and soft, in one production line at the same time, but to build one more furnace will require an additional investment of more than 5 million yuan, and the production of hard and soft varieties will have to be stopped and restarted during the conversion process. It can only be done after putting into production, which increases the cost of production

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