A method of blending bio-tar to produce carbon black

Abstract

The invention belongs to the technical field of carbon black production, and specifically relates to a method for producing carbon black by blending biotar: blending pretreated biotar into carbon black raw material oil to form a mixed oil, and then under the action of working gas I Carbonization reaction with high-temperature heat carrier to obtain carbonized gas-phase products and carbonized solid-phase products; part of the carbonized gas-phase products are used for pretreatment of biotar after gas-solid separation and fine filtration, and carbonized solid-phase products undergo multiple gas-solid separations to obtain carbon black Product and deactivated heat carrier containing some carbon black products; the deactivated heat carrier is regenerated under the action of working gas II. The invention fundamentally solves the difficult problems of raw material matching and process regulation in the production process of carbon black that biotar is difficult to directly use, and reduces the consumption of exogenous substances and energy in the process, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of carbon black production, and in particular relates to a method for producing carbon black by blending biological tar. Background technique [0002] Carbon black is an amorphous and soft industrial carbon product, which is widely used in rubber, paint, ink, plastic and other fields, and nearly 90% of it is used as rubber reinforcing agent. It is generally believed that the smaller the carbon black particles, the larger the specific surface, the smaller the crystallite size, the more microcrystalline defects and unsaturated charges, the higher the surface activity of carbon black, and the better the reinforcing effect when the particle size is less than 50nm . Traditional carbon black production methods include lamp smoke method, tank method, roller method, mixed gas method, gas furnace method, oil furnace method, etc., among which carbon black produced by oil furnace method accounts for more than 90% of t...

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Problems solved by technology

Jiang Xu et al. proposed a new method for producing carbon black by pyrolyzing coal tar based on the chemical chain principle, and found that Fe 2 o 3 The oxygen carrier can effectively catalyze the C-H bond breaking of tar at 900°C, and the probability of gasification reaction between the lattice oxygen and carbon black is low, which can promote the formation of carbon black, which is far lower than the 1400°C of the oil furnace method, but The oxygen carrier used has valence changes during the reaction process, which will make the reaction process complicated and difficult to control, and the energy supply of the entire system has not been considered (Jiang Xu, Wang Cuiping, Zhang Longlong. The competitiveness of the process of preparing carbon black from chemical chain pyrolysis coal tar Reaction Analysis, Journal of Qingdao University (Engineering Technology Edition), 2015,30(4):110~115)

Chinese patent CN110591418A discloses a method for preparing carbon black by plasma countercurrent cracking of gaseous hydrocarbons. By adjusting the corresponding relationship between the torch and the injection route of the raw material, the temperature, atmosphere and residence time required for the cracking of the raw material are precisely controlled. The active components improve the variety and quality of carbon black, but the plasma reactor consumes a lot of electricity and energy, and the electrode materials are easily lost, resulting in high plasma operation and maintenance costs

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