In order to solving the problem of operating calculation of heat exchanger which was difficult to master in learning of chemical industry elements,this paper introduces the principle of solution of operating problem of heat exchanger using the comparative method,and elaborates the process by two examples,this method has clear solving process and it can widely used.

The operation calculation and structure parameter selection of turbine butterfly valve combined with its development were analyzed and summarized.

It expatiates on the ability of information selection and computer operation in the paper,and it puts forward that the sci-tech journals editors should master the basic knowledge of the information retrieval and computer operation in current.