作　　者： ; ; ;

机构地区： 中国石油大学华东储运与建筑工程学院

出　　处： 《油气储运》 2011年第5期352-354,358,共4页

摘　　要： 原油加热炉是长输管道的主要能耗设备,针对其运行效率低的问题,通过数值计算和校核计算,筛选加热炉热效率的主要影响因素,为实施节能改造提供依据。数值模拟结果表明:不完全燃烧热损失随过量空气系数增加单调递减,当过量空气系数大于1.2时,不完全燃烧热损失均小于0.5%;容积热负荷过大或过小时,不完全燃烧热损失均较大,最佳容积热负荷范围是70～110kW/m3。校核计算结果表明:过量空气系数和负荷比过大或过小,加热炉热效率均较低,两者分别在1～1.2和0.6～1.1区间时,加热炉热效率较高;燃油加热炉改用天然气后,排烟热损失增大导致加热炉热效率降低。 Heater for crude oil is a main energy consumption facility in long-distance oil pipeline.However,low efficiency can be seen.The factors affecting the heat efficiency are screened by numerical calculation and verification calculation.Results show that heat loss due to the incomplete combustion is monotone decreasing along with the excess air ratio.The heat loss is lower than 0.5% when the ratio is higher than 1.2.The heat loss in incomplete combustion also occurs when volumetric thermal load is higher or lower,and the optimal value of it is 70~110 kW/m3.The verification calculation shows that no matter how high or low the excess air coefficient and thermal load ratio are,they will result in low heat efficiency.When they are at 1~1.2 and 0.6~1.1,respectively,the heat efficiency will be high.After oil-fired heater is changed into natural gas,the heat loss in flue gas will increase to decrease the heat efficiency of heater.

关 键 词： 不完全燃烧热损失 热效率 原油加热炉 过量空气系数 热负荷 有限元

领　　域： [石油与天然气工程]