玉门炼化总厂节能潜力及节能途径分析

玉门炼化总厂拥有常减压、催化裂化、柴油加氢改质、酮苯脱蜡(脱油)、催化重整等多套装置,总加工能力达300×104t/a。由于装置加工流程长,产品加工深度大等问题,虽然实施了一些节能措施,但创新性和高技术含量的节能新技术应用较少,2008年全厂综合能耗仍高达85.33kg标油/t原料,与国内先进企业相比差距较大。为此,提出改造催化装置余热锅炉、提高加热炉热效率、开展热联合、综合优化动力系统、充分利用低温余热等节能改造方案。其中,催化装置余热锅炉采用模块化新型结构,以消除露点腐蚀,减少烟气阻力,强化传热能力,消除炉体振动,确保能量回收为主要改造目的;提高加热炉热效率主要从优选加热炉燃烧器,完善烟气热能回收、完善加热炉吹灰、降低散热损失以及调整工艺流程等方面入手。同时,应实现装置间的能量集成优化,采取热电联产工艺,减少低温热能耗损失。预计上述节能改造实施后,全厂综合能耗可降低11~21kg标油/t原料。

Analysis of Potential and Approaches of Raising Energy Efficiency for Yumen Refining and Petrochemical Complex

The Refining and Petrochemical Complex of PetroChina Yumen Oilfield Company has atmospheric and vacuum units,catalytic crackers,diesel hydrogenation upgrading units,phenyl ketone dewaxing units and catalytic reformers with a total processing capacity of 300×10^4t/a.Due to a combination of factors such as long process of units and large product processing depth ,although the plant took some energy saving measures,few innovative and high energy efficiency technologies were introduced and the overall energy consumption of the plant in 2008 was still as high as 85.33kg of oil equivalent/t of feedstock,considerably higher than the lowest levels in China.To resolve these problems ,the plant proposed a series of plans to raise energy efficiency including upgrading the residual heat furnace of catalytic units ,raising the heat efficiency of the heating furnace ,introducing heat integration technology ,optimizing the dynamic system and making full use of low-temperature residual heat.The residual heat furnace of catalytic units proposed uses modularized design to eliminate dew-point corrosion,reduce flue gas resistance,strengthen heat transfer ability and eliminate the vibration of furnace body to ensure energy recovery.The main methods for raising the heat efficiency for the heating furnace include optimizing the burner of the heating furnace,improving heat recovery from flue gas, soot blowing for the heating furnace,reducing heat dissipation and adjusting technology and process.Energy use integration and optimization between units are also proposed including introducing combined heat and electricity generation and reducing low-temperature heat dissipation.It is expected that after these measures are taken,the overall energy consumption of the complex would drop by 11-21kg of oil equivalent per ton of feedstock.