Optimization of energy saving running mode of tobacco primary processing line

To minimize energy consumption caused by idle running, preheating process and excess negative pressure supplying to the pneumatic conveying system in tobacco primary processing line, the running mode of equipment was optimized as following:1) The control units in main equipment were finely divided, and the startup of downstream auxiliary equipment control unit was triggered by tobacco presence signal. 2) Optimizing PID parameters and the control means for steam condensate exhaust and accelerating equipment preheating to avoid auxiliary equipment's idle running. 3) Adopting frequency conversion automatic control technology to ensure the match between the number of running cigarette makers and the frequency of fan motor. The results indicated that:tobacco primary processing line ran stably under energy saving mode, the whole production line could all start up without material, and auxiliary equipment started up by tobacco presence signal and stopped once empty of tobacco. 423.6 thousand kW·h of electric power and 1311.8 tons of steam, valued more than 640 thousand RMB yuan, were saved per year. The cost of equipment running was reduced effectively.