Pumps And Materials For Flue Gas Desulphurization Plants
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In the commonly mostly employed, so-called, “wet technique” for the desulphurization of flue gas, stringent demands are being made on the materials of the pumps to minimize wear by corrosion and abrasion and to reach the longest possible service lives for the pumps. For various metallic corrosion resistant materials from several different suppliers, extensive laboratory investigations have been carried out, testing them in a “grinding pot,” thereby studying the corrosion and abrasion behavior at different flow velocities. Coated materials and welding materials were also tested; various parts were examined for crevice corrosion. It can be concluded that only certain duplex materials show a sufficient corrosion resistance, depending on the pH-value and chloride content of the flue gas desulphurization suspension, and on certain alloying elements and the heat treatment the materials received. A presentation of the design executions for an optimum design of pumps in flue gas desulphurization plants is offered. The principal elements of a centrifugal pump, such as impeller, casing, and shaft sealing with a packed stuffing box and mechanical seal are addressed.
Schoffler, Winfried (1987). Pumps And Materials For Flue Gas Desulphurization Plants. Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University. Available electronically from