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延迟焦化装置具有工艺成熟、原料灵活、操作和投资费用低等特点,其优化用能的系统化策略包括:要以装置总物料流程优化为基础,优化原料、产品流程以及装置循环比,缩短生焦周期;在保证装置产品质量的前提下,优化装置的反应条件,选取合适的反应温度、压力,优化装置的反应用能;优化分馏系统取热,优化换热网络与发汽量,加强热量回收,提高原料换热终温,降低加热炉负荷;优化吸收稳定系统中各塔操作条件,加强分馏系统与吸收稳定系统的热集成,回收利用稳定汽油的热量,结合全厂实际选择合理的压缩机驱动源;总结延迟焦化装置单元过程与设备节能措施,包括加热炉优化、大吹汽改造、除焦优化等;在对延迟焦化装置进行优化之后,选择合理的措施回收利用装置低温热,加强装置上下游的热联合,实现热供料,装置内部无法消化的低温热纳入全厂低温热系统。
Delayed coking unit has the characteristics of mature technology, flexible raw materials, low operation and investment costs. The systematic strategies for optimizing energy use include: optimizing raw materials, product flow and equipment recycling ratio based on the optimization of total equipment flow, Optimize the reaction conditions, select the appropriate reaction temperature and pressure, optimize the reaction energy of the device; optimize the fractionation system to take heat, optimize the heat exchanger network and the amount of steam to enhance the heat Recovery, increase the final heat transfer temperature of raw materials, reduce the load on the furnace; optimize absorption tower operating conditions of the tower system to strengthen the thermal separation system and absorption stability of the system integration, recovery and utilization of stable gasoline heat, combined with the actual plant selection reasonable compression Machine driving source; summarize the energy-saving measures of delayed coking unit process and equipment, including heating furnace optimization, large blow steam reforming, decoking optimization, etc .; after the optimization of delayed coking unit, select reasonable measures Recycling unit low temperature heat, Upstream and downstream of the hot joint, to achieve heat supply, the device can not be digested within the low-temperature heat into the whole plant low-temperature thermal system