南京炼油厂延迟焦化装置利用蜡油和分馏塔中段循环回流余热发生蒸汽,并经加热炉过热,实现了产品余热发汽全部自用。蒸汽品质优良,透平运行平稳,降低装置外供汽量70～80%,回收热能500万千卡/时,相当于加热炉实际总热负荷的17%,全年预计可发汽5万吨以上,节约冷却水100万吨,节约燃料气3,500吨,经济效果显著。 Delayed coking plant in Nanjing refinery using wax and the middle fractional distillation column circulating heat reflux steam, and overheating furnace, to achieve the product all the heat steam for personal use. The steam quality is good, the turbine runs smoothly, reducing the steam supply outside the plant by 70-80% and the heat recovery of 5 million kcal / hour, which is equivalent to 17% of the actual heating load of the heating furnace. Above, save 1 million tons of cooling water, saving 3,500 tons of fuel gas, the economic effect is remarkable.