Method for preparing coal water slurry by using cracked carbon black containing FCC discharge agent

Abstract

The invention belongs to the technical field of cracked carbon black recycling, and relates to a method for preparing coal water slurry by using cracked carbon black containing a FCC discharging agent; firstly a grinding, pickling, high temperature steam cleaning or high temperature calcining process is used to improve the activity of the FCC discharge agent, the FCC discharge agent is mixed witha hydrocarbon compound for cracking reaction to obtain the cracked carbon black, then the cracked carbon black is purified, and finally the cracked carbon black, coal powder and water are mixed according to a set volume ratio to obtain the coal water slurry. The FCC discharge agent can reduce the cracking activation energy of the hydrocarbon compound in the cracking reaction, and improves the cracking efficiency, the rate and the quality of cracked oil, the FCC discharge agent in the coal water slurry can improve the combustion characteristics of the coal water slurry, and plays a combustion-supporting role, the FCC unloading agent is turned from waste into treasure, resource-based high value utilization of the FCC discharge agent is realized, and the problems of high cracking temperatureand long cracking time of the hydrocarbon compound and the expensive treatment price of the FCC discharge agent can be solved.

Description

Technical field: [0001] The invention belongs to the technical field of pyrolysis carbon black recycling, and relates to a method for preparing coal-water slurry by using pyrolysis carbon black containing an FCC discharge agent. The combustion-supporting effect of heavy metals such as aluminum and nickel in the FCC discharge agent is used to improve the preparation efficiency. Combustion properties of coal water slurry. Background technique: [0002] Catalytic cracking (FCC) is one of the petroleum refining processes. It is a process in which heavy oil undergoes cracking reactions under the action of heat and catalysts, and is transformed into cracked gas, gasoline and diesel oil. FCC catalysts have good selectivity and high activity. , good stability and other advantages, it has become one of the most widely used catalysts in petroleum refining and catalytic cracking in the petroleum industry. The activity of FCC catalysts is polluted by heavy metals in the catalytic cracki...

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Problems solved by technology

[0002] Catalytic cracking (FCC) is one of the petroleum refining processes. It is a process in which heavy oil undergoes cracking reactions under the action of heat and catalysts, and is transformed into cracked gas, gasoline and diesel oil. FCC catalysts have good selectivity and high activity. , good stability and other advantages, it has become one of the most widely used catalyst varieties in petroleum refining and catalytic cracking in the petroleum industry. The activity of FCC catalyst is polluted by heavy metals in the process of catalytic cracking, which leads to the change of reaction selectivity of FCC catalyst. Poor, if the activity and selectivity of the balancer cannot be maintained only by natural running loss and replenishment of new agents, so in the catalytic cracking process, a part of the balancer is periodically discharged to ensure the activity and selectivity of the FCC catalyst. The balance agent is called FCC waste catalyst, also known as FCC unloading agent. The main components of FCC waste catalyst are silicon dioxide, aluminum oxide, rare earth and heavy metals. FCC waste catalyst has low activity, heavy metal content and strong pollution. And the difficult problem of harmless treatment, petroleum refining enterprises generally adopt simple general solid waste landfill method to dispose of FCC waste catalyst, this method of burying not only causes waste of resources, but also pollutes the environment

FCC waste catalysts were included in the "National Hazardous Waste List" issued in 2016. According to the national hazardous waste management requirements, the production, storage, transportation and disposal of FCC waste catalysts will be regulated by the state, and the treatment cost will be greatly increased.

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