Lanzhou Petrochemical Refinery Reforming Technical Transformation Of Aromatics Extraction System Expansion

Paper mainly through the quality standard of gasoline products, domestic gasoline pool and low olefin, high octane value of the current, low sulfur gasoline group divided into production process were reviewed in this paper. Reforming device for producing oil generated in the gasoline blending octane value contribution is large, but because of its high benzene content, unable to meet the gasoline reconcile the demands must be were used to remove the benzene, aromatics extraction is reforming unit de benzene technology facilities, Lanzhou Petrochemical company refinery reformer in 2011 after revamping, the handling capacity is improved, but aromatic extraction system without expansion, lead to restructuring of the oil generation can't all benzene removal. By 2014 the device overhaul, aromatic extraction system of revamping, through the transformation of additional extraction in low temperature dechlorination tank, tower C-301 top from C6 to C8 instead of C6 to C7, in xylene tower and feed before the new two clay tower, xylene column feeding process change, as well as the machine part of the pump and heat exchanger process transformation.the realization of the aromatics extraction and the upper reaches of the continuous reforming unit supporting the production, can produce reforming unit all de pentane oil, for gasoline blending reducing benzene production to provide a guarantee. "Three benzene production increase, the annual benefit increased by 229,010,000 yuan. Non aromatics, heavy aromatics yield makes the downstream of n-hexane and three toluene device for enterprises annual benefit increase 22,608,500 yuan. Benzene product from benzene-535 to benzene-545. To effectively reduce the loss of solvent, rubber industrial solvent oil production reached the level of product quality requirements.