The modern transportation system is increasingly developed during recent years.It is an effective solution to set the noise barriers to reduce the traffic noise pollution caused by different kinds of transportation sy...The modern transportation system is increasingly developed during recent years.It is an effective solution to set the noise barriers to reduce the traffic noise pollution caused by different kinds of transportation systems.Many deficiencies on concrete noise barriers and metal noise barriers with rivet structure can be eliminated by a new kind of noise barrier with no-riveted structure.The mechanical performance examination and acoustic performance test are conducted on the new-designed noise barrier with no-riveted structure.The results indicate that the maximum stress is 1.74 MPa and the maximum deformation is 1.04 mm with load acting on the unit plate.The noise reduction coefficient of this kind of no-riveted noise barrier unit plate is 0.75 and its noise insulation is 40 dB,which were conform to or superior to the standard requirements.Therefore,this new designed noise barrier meets the field application requirements of mechanical and acoustic performance,which demonstrates the noise barriers can be widely promoted.展开更多
炼化企业中,戊烷发泡剂可以利用预加氢装置拔出的轻石脑油组分进行生产,而国家标准GB T 22053—2020对发泡剂质量要求更加严格。通过构建预加氢装置汽提塔、分馏塔及脱戊烷塔的ASPEN PLUS模型,对戊烷发泡剂生产流程的控制参数进行分析测...炼化企业中,戊烷发泡剂可以利用预加氢装置拔出的轻石脑油组分进行生产,而国家标准GB T 22053—2020对发泡剂质量要求更加严格。通过构建预加氢装置汽提塔、分馏塔及脱戊烷塔的ASPEN PLUS模型,对戊烷发泡剂生产流程的控制参数进行分析测算,制定了生产调整方案。工业试验结果表明:戊烷发泡剂组成与脱戊烷塔塔顶灵敏板温度密切相关,保证塔顶发泡剂组分质量分数差值范围为±2%,其塔顶温度变化需控制±0.3℃。同时,从汽提塔操作、产品牌号、加工原油种类等方面入手,对戊烷发泡剂增产效果进行分析,提高企业的经济效益。展开更多
基金supported by the National Natural Science Foundation of China (No. 51768014).
文摘The modern transportation system is increasingly developed during recent years.It is an effective solution to set the noise barriers to reduce the traffic noise pollution caused by different kinds of transportation systems.Many deficiencies on concrete noise barriers and metal noise barriers with rivet structure can be eliminated by a new kind of noise barrier with no-riveted structure.The mechanical performance examination and acoustic performance test are conducted on the new-designed noise barrier with no-riveted structure.The results indicate that the maximum stress is 1.74 MPa and the maximum deformation is 1.04 mm with load acting on the unit plate.The noise reduction coefficient of this kind of no-riveted noise barrier unit plate is 0.75 and its noise insulation is 40 dB,which were conform to or superior to the standard requirements.Therefore,this new designed noise barrier meets the field application requirements of mechanical and acoustic performance,which demonstrates the noise barriers can be widely promoted.
文摘炼化企业中,戊烷发泡剂可以利用预加氢装置拔出的轻石脑油组分进行生产,而国家标准GB T 22053—2020对发泡剂质量要求更加严格。通过构建预加氢装置汽提塔、分馏塔及脱戊烷塔的ASPEN PLUS模型,对戊烷发泡剂生产流程的控制参数进行分析测算,制定了生产调整方案。工业试验结果表明:戊烷发泡剂组成与脱戊烷塔塔顶灵敏板温度密切相关,保证塔顶发泡剂组分质量分数差值范围为±2%,其塔顶温度变化需控制±0.3℃。同时,从汽提塔操作、产品牌号、加工原油种类等方面入手,对戊烷发泡剂增产效果进行分析,提高企业的经济效益。
