摘要
针对重复热处理初始温度相同和不同两种情况,研究了热历史对西部原油管道冬季外输加剂吐哈油在沿线各站的凝点变化规律,结果表明:初始油温高于20℃,重复热处理对加剂吐哈油的凝点影响较小;初始油温低于20℃,重复热处理对油品的凝点影响较大,重复热处理温度在20～35℃之间将使原油物性明显恶化。开展了现场跟踪试验,结果表明:西部原油管输加剂吐哈油出站油温高于50℃、进站油温高于20℃,能够确保安全生产;出站油温为20～35℃,加剂吐哈油的凝点明显升高,安全生产将难以保证;采用首站一站式启炉,目前尚可满足管道安全运行的需要,一旦其因管道输量变化不能满足要求时,中间热泵站启炉热处理温度需避开20～35℃温度区间。
The influence of thermal history on the set point change laws of exported PPD-added Tu-Ha Oil in each pump station of West Oil Pipeline is researched under the condition of repeated heating with different initial temperatures. Results show that when the initial temperature is higher than 20 ℃ , the effect of repeated heating on the set point of PPD-added oil is inconspicuous, or vice-versa; and when the repeated heating temperature is between 20 ℃ and 35 ℃ , the oil’s physical property will be worse. So, the tracking test is carried out, and the results show that when outlet temperature of the PPD-added Tu-Ha Oil is higher than 50 ℃ and its inlet temperature is higher than 20 ℃ , the normal running of pipeline can be ensured. When the outlet temperature is between 20 ℃ and 35 ℃ , the set point of PPD-added Tu-Ha Oil will be increased signifi cantly and the normal running of pipeline can hardly be ensured. At present, the one-stop heater starting mode can basically provide a safety to the running of pipeline, however, if a changing throughput impacts the running safety of pipeline, the heating temperature for starting heater in intermediate heating/pumping station should keep away from the temperature range of 20 ℃ to 35 ℃.
出处
《油气储运》
CAS
2012年第2期125-127,166-167,共3页
Oil & Gas Storage and Transportation
关键词
西部原油管道
吐哈油
热历史
凝点
物性恶化
the Western Crude Oil Pipeline, Tu-Ha Crude Oil, thermal history, set point, property deterioration
