Harmful Gas Sanitation Protective Distance Calculating Method Research

This paper researches and discusses the calculating methods of sanitation protective distance, presents the skill of determination of parameter´s value. Those factories who use or produce toxic and harmful material, must be set a protective distance from the sensitive area in spite of the factories are newly built, rebuilt or expanded built. But the calculating method recommended by the china state has many uncertain factors in practical calculating process, it is hard to determine the parameters and we cannot calculate the sanitation protective distance normally. Based on the case of soda-made trade, we analyses the practical calculating method of sanitation protective distance, discussed the actual skills needed in determination of the value of these parameters, introduced a specific calculation process and analyzed the corresponding factors. In addition, for the existing sewage enterprises, and based on the premise that had set a protective distance from hospitals, schools, residential construction and other sensitive buildings, considering of different conditions, this paper studied the calculating method of restrictions on the enterprise sewage conditions, and also gave the needed control indicator combined the actual conditions. The skills and methods given in this paper can be used for reference to environment impact assessment organizations, enterprise and environmental manage department.