3.8 Boiler Control systems

A rapid increase in boiler load causes an immediate increase in steam flow from the boiler, which creates a sudden ____ in the boiler steam drum pressure

In a fuel flow - airflow combustion control system, the fuel flow signal makes the final adjustment to the ________

In a fuel flow - airflow combustion control system, the fuel and airflows are measured directly and are converted to ________ signals by means of square root extractors

By measuring and comparing the steam and the _____, it is possible to obtain efficient combustion in a boiler by maintaining a proper steam to airflow ratio

With On - Off boiler feed water control, water is supplied ______ to the boiler, either by fully opening or fully closing a valve in the feedwater line.

A sudden increase in load, a decrease in drum pressure, and an immediate increase in heat release is called ________

Gas bypass method involves the seperation of the convection section of the boiler into two, or more, ______ gas passes

The furnace pressure controller will adjust the boiler ____ dampers to keep the pressure constant at all boiler loads

An oxygen analyzer can also be provided to indicate the excess oxygen in the flue gas, assisting the operator to control the excess air and increasing boiler _________