摘要: Equipment and techniques for the continuous monitoring of opacity and gaseous emissions (sulfur dioxide and nitrogen oxides) in stack gas and coal-fired electric power plants were reviewed. The experience of users and problems enc... 展开 Equipment and techniques for the continuous monitoring of opacity and gaseous emissions (sulfur dioxide and nitrogen oxides) in stack gas and coal-fired electric power plants were reviewed. The experience of users and problems encountered were discussed. Possible techniques for the continuous measurement of mass particulate emissions that are in the research stage include the attenuation and scattering of light,the deposition of electrical charges,the attenuation of beta radiation,and the effect of deposited particles on the vibrational frequency of a quartz crystal. 收起