Method for producing carbon black by blending biological tar

Abstract

The invention belongs to the technical field of carbon black production, and particularly relates to a method for producing carbon black by blending biological tar. The method comprises the followingsteps: blending pretreated biological tar into carbon black raw oil to form mixed oil, and carrying out carbonization reaction on the mixed oil and a high-temperature heat carrier under the action ofworking gas I to obtain a carbonized gas-phase product and a carbonized solid-phase product; carrying out gas-solid separation and fine filtration on the carbonized gas-phase product, then using one part of the carbonized gas-phase product for pretreatment of biological tar, and carrying out gas-solid separation on the carbonized solid-phase product for multiple times to obtain a carbon black product and an inactivated heat carrier containing part of the carbon black product; and regenerating the inactivated heat carrier under the action of the working gas II. The method fundamentally solves the problem that the biological tar is difficult to be directly used for raw material matching, process regulation and control and the like in the carbon black production process, reduces the consumption of exogenous substances and energy sources in the process and has favorable 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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