炼油厂利用低温余热进行有机朗肯循环发电及其效益分析

ORGANIC RANKINE CYCLE POWER GENERATION USING LOW TEMPERATURE WASTE HEAT IN REFINERY AND ITS BENEFIT ANALYSIS

为了充分利用低温余热,避免热量的浪费以及噪音和环境污染,某石化公司采用有机朗肯循环发电技术回收凝结水、蒸汽、乏汽中的低温余热进行发电。介绍了该石化公司的低温余热资源现状和利用各种低温余热进行发电的工艺流程,并分析了该发电项目所创造的经济效益和环境效益。结果表明,实施该项目后,该公司年发电净收益为869.8万元,年平均回收软化水收益为819万元,一年半时间就可回收全部投资;年节约能耗约为169354 GJ,年减排CO 2量约为12.9 kt。该发电项目的实施对提高全厂能效、创建节约型企业、推动公司“节能降耗”计划具有重要意义。

A petrochemical company adopted organic Rankine cycle to recover low temperature waste heat from condensed water,steam and exhaust steam in the power generation process.The present situation and the process of power generation using every kind of low temperature waste heat in the company were described.The economic and environmental benefits of the power generation project were analyzed.The results indicated that the annual net income of power generation was 8.698 million Yuan;the annual average income of recycling soft water was 8.19 million Yuan,and the entire investment can be recovered in one year and a half.The annual energy saving reached about 169354 GJ,the annual reduction amount of CO 2 was about 12.9 kt.The implementation of this power generation project is of great significance for improving the energy efficiency of the whole plant,creating energy-saving enterprise and promoting the company’s energy saving and consumption reduction plan.