至尊木虫 (知名作家)
逆水行舟，不进则退 ![]()
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RXMCDM: 金币+1, 再努力努力！ 2014-04-16 17:24:27
fengling1205: 金币+10, 翻译EPI+1, ★有帮助 2014-04-16 17:44:10
fengling1205(RXMCDM代发): 金币+10 2014-04-16 17:49:15
abstract：
Catalytic cracking slurry is fractionator bottom oil, containing a small amount of catalyst powder, to prevent coking and maintain the device thermal equilibrium, many refineries to jilt slurry outside using the method to solve this contradiction, the FCC (FCC) each year on China to jilt slurry oil is as high as more than 7.5 million tons, a large number of outside general as cheap jilt slurry boiler fuel, not only waste the energy, and solid powder will adhere to in the furnace of slurry oil, on the wall, reduce the heat transfer efficiency. Slurry containing catalyst dust polycyclic aromatic hydrocarbons, colloid and asphaltene, and alkenes, can use a large amount of high boiling point heavy aromatics in slurry oil, saturated hydrocarbon production of activated carbon fiber, rubber, plastic, softener, high temperature heat conduction oil, green tire and rubber oil; Polycyclic aromatic hydrocarbons in FCC slurry oil further condensation to produce carbon black, needle coke.
Based on catalytic cracking slurry and the nature of the equilibrium catalyst powder and do some analysis, on the slurry oil colloid dispersed system, the slurry oil as with catalyst powder as the disperse phase nuclear, wrapped in the asphalt outside the catalyst nuclear as a dispersed phase, and in the asphalt outside from the inside out by certain properties (aromaticity, polarity, solubility parameter) the law of the diminishing of dispersed phase nuclear solvation layer, dispersion medium is mainly made up of some characteristics of the lowest component, and to reach a dynamic equilibrium with the dispersed phase forms a stable colloidal dispersion system. In a new sense of slurry system of the colloidal dispersion model, to be considered in catalytic cracking slurry oil solvent refining process of powder.
Respectively in this paper has carried on the catalytic cracking slurry batch and continuous pure furfural extraction experiments, respectively obtained the optimum solvent extraction conditions of furfural as solvent.
In new slurry solids determination method was put forward and to comprehensively consider the colloidal dispersion of the slurry system theory model and the slurry after extraction of refined principle, has carried on the FCC slurry oil filter removal catalyst powder test, put forward two kinds of slurry oil solvent refining joint filtration separation powder off plan: the first kind of plan for catalytic cracking slurry mixes with furfural in the operating temperature is 70 ℃, agent oil ratio of 4 under the experimental conditions of extraction separation first, then to extract and raffinate fluid filtration catalyst powder respectively; The second scheme first to catalytic cracking slurry mixed with furfural 1:1 heated to 100 ℃, after filtering into the extraction tower and the furfural extraction oil ratio 3:1 (agent), after the extraction of extract and raffinate fluid respectively after the recovery of furfural raffinate oil and extract oil, raffinate oil return to catalytic cracking unit as a feedstock for catalytic cracking, extract oil as rubber filling oil or tar harmonic components for sale.
Two kinds of schemes can achieve solvent refined oil slurry, and removing the catalyst powder that is the effect of the comprehensive utilization of slurry oil available for refinery device in practical application for its actual situation and the corresponding economic benefits are tested. |
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