| PVC production process of calcium carbide process, the characteristics of pollutants in vinyl chloride to people's living environment, safety and health, vegetation growth, weather and climate have an extremely adverse impact. This topic mainly for PVC production each link of vinyl chloride on atmosphere, water, solid product pollution take technical measures to control, so that the discharged into the atmosphere of vinyl chloride concentration is less than or equal to 36mg/m3 and discharged into the water content is less than or equal to 2 mg/L, in the solid product residual vinyl chloride is less than or equal to 5 mg/kg. At the same time, make the tank leak risk emergency control, meets the requirement of environmental protection.Through the pressure swing adsorption technology for the recovery of chlorine and ethylene in the atmosphere, the use of the distillation tail gas in the comprehensive utilization of chlorine, and the operation of the system is set up by the method of operation. The water chlorine ethylene, through the stripping process flow operation of the standard discharge. Of solid products of residual vinyl chloride, by slurry steam provided the ways to deal with, in slurry stripping process, take the two different plate steam stripping device are compared, replacement of the overflow weir plate stripper, the operation parameter debugging, and aperture of the tower plate reaming reform, making PVC products residual vinyl chloride to meet the requirements of the standard. In addition, according to the actual production situation, application professional knowledge of emergency management, based on the maximum credible accident and probability, the incident source strength, chemical unit to focus on regional risk were evaluated risk prevention measures, formulate disposal programs, and hierarchical response procedures, equipped with emergency supplies, prevent the occurrence of chlorine ethylene spherical tank leaked the environment risk. |
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