Operation of the air screw and chamber pumps in a system for air transport of pulverized coal

In 1968 an 800 Mw power plant in the USSR was put in operation. This plant was fueled by pulverized anthracite coal which was fed by air screw pumps through 300 mm-dia pipes a distance of 600 meters. Unsatisfactory operation of these pumps led to the additional installation of a two-chamber pneumatic pump for aiding in the coal fines transport. The design, operation, performance testing, and performance of the pumps and pneumatic transport system are described. (LCL)