摘要
湿法脱硫饱和湿烟气从烟囱直排将出现白烟现象,形成明显的视觉污染,并会对周边环境造成影响,相关的治理工作已在全国陆续展开。混兑热空气是一种应用前景广阔的消白烟技术,其投资和运行费用低,可以有效利用炼厂中低温余热,有利于企业节能减排。通过热力学分析可知,烟气和热空气混合后的状态点在过环境温度点的烟气饱和曲线的切线上时,混兑热空气消白技术能耗最小。在环境条件和饱和烟气参数给定的情况下,混兑热空气的最小吸热量是一个定值,与混兑空气的流量和温度无关。通过经济分析发现,设备投资、系统运行费用、高温热源消耗、使用寿命、运行时间等因素对混兑热空气消白技术经济性影响较大,方案选择时需根据具体情况进行综合全面分析。
The direct discharge of saturated wet flue gas from wet desulfurization plant would produce white smoke over the chimney,which has caused obvious visual pollution and affected the surrounding environment.The wet plume controls have been carried out in the country.The wet plume control technology mixing with hot air is a promising process to eliminate the white smoke with low investment and operation cost.It can effectively utilize the waste heat at medium and low temperature,enabling the operator to cut energy use and emissions.Thermodynamic analysis shows that the energy consumption of the mixing-hot-air technology is the smallest when the state point of mixed flue gas and hot air is on the tangent of flue gas saturation curve passing environmental temperature point.When the environmental conditions and saturated flue gas parameters are given,the heat absorption of the hot air is a fixed value,independent of the flow rate and temperature of the air.Through economic analysis,it is found that equipment investment,system operation cost,high temperature heat consumption,service life,operation time have a greater impact on the techno-economic indicators of the mixing-hot-air technology for wet flue gas plume elimination.Therefore,the implementation plan should be comprehensively analyzed and selected according to the specific situation.
作者
李玖重
孙志钦
Li Jiuchong;Sun Zhiqin(Luoyang R&D Center of Technology Sinopec Engineering(Group)Co.,Ltd.,Luoyang Henan 471003,China)
出处
《石油石化绿色低碳》
2020年第4期31-35,共5页
Green Petroleum & Petrochemicals
关键词
湿法脱硫烟气
白烟现象
混兑热空气技术
wet desulfurization flue gas
white plume phenomenon
hot air mixed technology
