Pulverizer air flow and temperature control

Details Pulverizer air flow and temperature control Pulverizer air flow and temperature control

G - Physics

05

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50/1

G05D 11/00 (2006.01) F23K 1/04 (2006.01) F23K 3/02 (2006.01) F23N 1/02 (2006.01) F23N 5/18 (2006.01)

Patent

CA 1092825

PULVERIZER AIR FLOW AND TEMPERATURE CONTROL Abstract of the Disclosure: The flow of preheated and ambient air to a coal pulverizer, is controlled in a manner whereby the preheated air flow will be varied as a function of pulverizer discharge temperature air while "cold" ambient air flow will be varied as a function of pulverizer inlet air flow! rate error. Flow set point is varied as a function of temperature error to enhance system response to temperature errors. A minimumflow set point is then used so that flow will take precedence over temperature error should pulverizer inlet flow fall below a predetermined minimum. Preheated air flow is varied as a function of flow error only when the inlet flow rate falls below the predetermined minimum.

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