9,151,490 – Knorr, Jr.; Warren G. – Boiler control system

Patent No.: 9,151,490 (get PDF)

Title: Boiler control system

Assignee: Knorr, Jr.; Warren G.

Abstract: A boiler control system for efficiently controlling the operation of a packaged boiler is provided. The system includes a combustion air control system, a fuel control system, a flue gas sensing system, and a boiler controller. The boiler controller is in operative communication with the combustion air control system, fuel control system, and the flue gas sensing system. Based upon a system demand, the boiler controller controls coarse-level operation of the combustion air control system and the fuel control system. The flue gas sensing system may include an oxygen sensor and a flue gas differential sensor to sense a change in a characteristic of the flue gas. When the flue gas differential sensor senses a change in the flue gas characteristic that meets a flue gas differential setpoint, the boiler controller controls the fine-level operation of the boiler.

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