Analysis And Improvement On Continuous Emission Monitoring System

The requirements of environmental protection become very strictness. Thermal power plant is major sewage enterprises and the requirements of environmental protection department for Continuous Emission Monitoring System (CEMS) are very strict and precise. It also has a significant impact on economic which related to the desulfurization price subsidies for the power plant. In the past decade, pollution source automatic monitoring equipment is constructed and developed quickly. 324 provincial and municipal control centers have been built across the country, 5427 sets gases monitoring automatically equipments are installed in 10,279 key enterprises. Therefore, both the thermal power plant and the environmental protection departments attach to the accuracy and stability of CEMS online meter and the continuity of data transmission.The meaning, significance history and current situation of CEMS, and composition structure of CEMS is described in this paper. The various parts measurement principles of the CEMS is given in detail. Analysis of the existing CEMS system combined with the actual site is completed. The selection of the measuring points, various types of equipment, measurement accuracy and stability of transmission is introduced. According to the actual situation of Xibaipo plant CEMS system, the reasons carefully of measurement errors of each part is analysed. Some corresponding measures to ensure that the CEMS system stability and the transmission continuity is given. Not only more reflection of the real operation of desulfurization system, but also more the economic benefits for the plants can obtained by improvement. A true, reliable and valid data for supervision and monitoring of the environmental protection department can be provided.