The technical features and commercial test results of flexible dual-riserfluidized catalytic cracking (FDFCC) process are presented for refiners to choose an efficientprocess to upgrade FCC naphtha and boost propylene...The technical features and commercial test results of flexible dual-riserfluidized catalytic cracking (FDFCC) process are presented for refiners to choose an efficientprocess to upgrade FCC naphtha and boost propylene production in a RFCC unit. The commercial testresults indicate that the olefin content of catalyti-cally cracked gasoline can be significantlyreduced to less than 20 v%, while sulfur content reduced by 15%-25% and RON increased by 0.5―2units in a RFCC unit. In addition, propylene yield and the production ratio of diesel to gasolinecan also be remarkably enhanced in the RFCC unit.展开更多
In June 22, a ground breaking ceremony was warmly held for Qingdao Refining Project. It marked that the construction of Qingdao Refining Project have entered into a fast progressing period, and that the construction o...In June 22, a ground breaking ceremony was warmly held for Qingdao Refining Project. It marked that the construction of Qingdao Refining Project have entered into a fast progressing period, and that the construction of a ten-million-ton refinery “being the first level in the world and taking the lead in China”in the 21st century have been completely launched.展开更多
During the operation of complex process, such as oil production or refming, abnormal situations may occur, leading to an alarm flooding. Alarm flooding is the signalling of a large number of alarms in a few minutes, i...During the operation of complex process, such as oil production or refming, abnormal situations may occur, leading to an alarm flooding. Alarm flooding is the signalling of a large number of alarms in a few minutes, in such a way that it is impossible for the operator to attend to all alarms. On these occasions, it is usual that the operator leaves the alarm summary list and gets an analysis of the plant through the screens of the DCS （digital control system）, seeking to understand the situation. The alarm summary list ceases to be a useful tool. In such cases, the operator might have the aid of a filter that would present the highest priority alarms and other information associated with them, enabling him to gain a better knowledge of the situation. This paper describes the interface of a system aimed to help the operator to have a more comprehensive knowledge of the process （a better situational awareness） during process upsets that cause alarm flooding, recovering the utility of the alarm layer to the safety of industrial processes.展开更多
文摘The technical features and commercial test results of flexible dual-riserfluidized catalytic cracking (FDFCC) process are presented for refiners to choose an efficientprocess to upgrade FCC naphtha and boost propylene production in a RFCC unit. The commercial testresults indicate that the olefin content of catalyti-cally cracked gasoline can be significantlyreduced to less than 20 v%, while sulfur content reduced by 15%-25% and RON increased by 0.5―2units in a RFCC unit. In addition, propylene yield and the production ratio of diesel to gasolinecan also be remarkably enhanced in the RFCC unit.
文摘In June 22, a ground breaking ceremony was warmly held for Qingdao Refining Project. It marked that the construction of Qingdao Refining Project have entered into a fast progressing period, and that the construction of a ten-million-ton refinery “being the first level in the world and taking the lead in China”in the 21st century have been completely launched.
文摘During the operation of complex process, such as oil production or refming, abnormal situations may occur, leading to an alarm flooding. Alarm flooding is the signalling of a large number of alarms in a few minutes, in such a way that it is impossible for the operator to attend to all alarms. On these occasions, it is usual that the operator leaves the alarm summary list and gets an analysis of the plant through the screens of the DCS （digital control system）, seeking to understand the situation. The alarm summary list ceases to be a useful tool. In such cases, the operator might have the aid of a filter that would present the highest priority alarms and other information associated with them, enabling him to gain a better knowledge of the situation. This paper describes the interface of a system aimed to help the operator to have a more comprehensive knowledge of the process （a better situational awareness） during process upsets that cause alarm flooding, recovering the utility of the alarm layer to the safety of industrial processes.
