Evaluating dust arresting equipment on large coal-fired steam generators.

Abstract

This paper reviews the experience of The Detroit Edison Co. in conducting performance tests on dust arresting equipment on large stoker-fired and pulverized coal-fired steam generators. The review includes the application of various test procedures and apparatuses. It also describes a special test apparatus in its present state of development and the test procedures involved. This equipment employs “Null” sampling nozzles of the VanTongeren design, ranging from 0.75 to 1.50 in. diam. The equipment has two distinct advantages over the presently available commercial devices: (1) it provides a means of approaching isokinetic sampling under adverse test conditions, and (2) the size of the collected dust sample is generally adequate for analysis under the new ASME Power Test Code 28, “Determining the Properties of Fine Particulate Matter.” A critical review of experiences and practices is presented, standardization is proposed, and areas of further research and development are indicated.