固定污染源自动监测系统(CEMS)与手工监测比对实验

Comparative Tests between Automatic Monitoring System CEMS and Manual Operation for Stationary Pollution Sources

通过固定污染源非甲烷总烃的手工监测数据与自动监测系统(CEMS)监测数据的比对分析,发现自动监测数据受外界环境影响较小,更准确。由于手工监测和自动监测进样频率不同和手工监测因采样及运输中实际样品有部分VOCs发生了吸附反应、解离等第2次反应或二次生成物从而导致的损耗以及实验室的温湿度环境等因素都会直接导致实际样品测试结果发生偏差,建议加强在线监测设备的运维管理,推进固定污染源非甲烷总烃CEMS合理有序发展。

By comparing the data of non-methane hydrocarbon(NMHC)emission from stationary pollution sources acquired respectively by manual monitoring operation and automatic monitoring system CEMS(continuous emission monitoring system),it was found that the latter ones could be less affected by the external environment and more accurate.Among the test results of practical samples,there might be deviation brought about by the difference in sampling frequencies in between and the loss of part VOCs in samples caused by secondary reactions such as the adsorption,desorption and etc.or secondary products generated in the course of sampling and transport,as well as the temperature and humidity environment in the laboratory.It is suggested to strengthen the operation and maintenance management of online monitoring equipment and promote the rational and orderly development of CEMS for NMHC emission from stationary pollution sources.