Overall analysis was made of different factors influencing material temperature in extruding process of PVC-U pipes and their relationships.

The effects of the feed composition and the feed temperature on the energy-saving efficiency of the backward-feed two-effect distillation are researched in ethanol-water system by process simulation.

As the forward-feed,backward-feed,dual-feed two-effect distillation are not better used at the conditions of the feed temperature being higher than the bubble point temperature,we chose new type distillation flow-two-effects system with vapor feed to reboiler.

PID controller of barrel temperature based on BP neural network;

Process parameters are settled such as barrel temperature, screw speed, injection pressure, injection velocity and holding time and so on.

Firstly, this paper analyzes the electronic control system of plastic injection-molding machine in detail, puts forward a method which bases on the control algorithm of PID neural network to regulate the barrel temperature, and uses the method to simulate the model of barrel heating system.

Firing temperature control system of 90 m 2 sintering machine in Xiangtan Iron and Steel Company was computer automatic control system for charge level temperature.

The result shows they improve the calcining rate of the materials,decrease the clinker temperature at the outlet of the cooler and increase the quality and quantity of the clinker.