To improve the safety and efficiency of polishing operations in circular boiler headers, a new type of wheel-drive polishing robot was developed in this study. The robot was designed to grind weld beads on the inner w...To improve the safety and efficiency of polishing operations in circular boiler headers, a new type of wheel-drive polishing robot was developed in this study. The robot was designed to grind weld beads on the inner walls of pipes in diameter between 550 mm and 714 mm. The robot consists of a moving structure, a positioning structure, and a polishing structure. Charge coupled device （CCD） cameras and line lasers are used in the robot＇s vision system, thus the robot can be manually controlled to move, locate, and grind quickly and accurately. The experimental results showed that the robot performed well in practical applications.展开更多
Gas flaring is concerned with the combustion of lighter ends of hydrocarbon mostly produced in association with crude oil. Flare networks are designed to handle the gas volume required to be flared. Most times, this f...Gas flaring is concerned with the combustion of lighter ends of hydrocarbon mostly produced in association with crude oil. Flare networks are designed to handle the gas volume required to be flared. Most times, this flare networks are in close proximity but still have independent flare stacks, increasing risk to environment and cost on infrastructures. There is a need to integrate the flare networks in facilities within same area and through the application of Pinch Analysis concept, the resultant flare network can be optimized to give a system having optimal tail and header pipe sizes that will reduce cost and imp</span><span style="font-family:Verdana;">act on environment. In the light of the foregoing, the conce</span><span style="font-family:Verdana;">pt of pinch analy</span><span style="font-family:Verdana;">sis was used in debottlenecking integrate</span><span style="font-family:Verdana;">d gas flare networks from a flow station and a refinery in close proximity. Both flare networks were integrated and the resultant gas flare network was optimized to obtain the optimum pipe header and tail pipe sizes with the capacity to withstand the inventory from both facilities and satisfy the set constraints such as Mach number, noise, RhoV</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> and backpressure. Mach number was set at 0.7 for tail pipes and 0.5 for header pipes, noise limit was not to exceed 80 dB upstream and 115 dB downstream the sources, RhoV</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> was limited to 6000 kg/m/s</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> and the back</span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">press</span><span style="font-family:Verdana;">ure requirement was source dependent respectively. The</span></span></span></span><span><s展开更多
文摘To improve the safety and efficiency of polishing operations in circular boiler headers, a new type of wheel-drive polishing robot was developed in this study. The robot was designed to grind weld beads on the inner walls of pipes in diameter between 550 mm and 714 mm. The robot consists of a moving structure, a positioning structure, and a polishing structure. Charge coupled device （CCD） cameras and line lasers are used in the robot＇s vision system, thus the robot can be manually controlled to move, locate, and grind quickly and accurately. The experimental results showed that the robot performed well in practical applications.
文摘Gas flaring is concerned with the combustion of lighter ends of hydrocarbon mostly produced in association with crude oil. Flare networks are designed to handle the gas volume required to be flared. Most times, this flare networks are in close proximity but still have independent flare stacks, increasing risk to environment and cost on infrastructures. There is a need to integrate the flare networks in facilities within same area and through the application of Pinch Analysis concept, the resultant flare network can be optimized to give a system having optimal tail and header pipe sizes that will reduce cost and imp</span><span style="font-family:Verdana;">act on environment. In the light of the foregoing, the conce</span><span style="font-family:Verdana;">pt of pinch analy</span><span style="font-family:Verdana;">sis was used in debottlenecking integrate</span><span style="font-family:Verdana;">d gas flare networks from a flow station and a refinery in close proximity. Both flare networks were integrated and the resultant gas flare network was optimized to obtain the optimum pipe header and tail pipe sizes with the capacity to withstand the inventory from both facilities and satisfy the set constraints such as Mach number, noise, RhoV</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> and backpressure. Mach number was set at 0.7 for tail pipes and 0.5 for header pipes, noise limit was not to exceed 80 dB upstream and 115 dB downstream the sources, RhoV</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> was limited to 6000 kg/m/s</span><sup><span style="font-family:Verdana;">2</span></sup><span style="font-family:Verdana;"> and the back</span></span></span><span><span><span style="font-family:""> </span></span></span><span><span><span style="font-family:""><span style="font-family:Verdana;">press</span><span style="font-family:Verdana;">ure requirement was source dependent respectively. The</span></span></span></span><span><s
