The control panel for the two Stoker Boilers, just another typical set up..
The boiler control panel from the rear showing the various pneumatic controllers and interconnecting copper tubing. To calibrate each device have to take the tubing apart and hook up regulators and gauges. It's no wonder I like software so much these days!
The picture below is of a Venturi Scrubber that was attached to one of the boilers at the plant. I spent many a cold day outdoors fooling around with it, trying my best to make the darn thing work in automatic. It was basically simple in concept, the flue gases from the boiler would travel down through the scrubber where numerous spray heads injected water into the gases. The abrupt change in direction at the bottom of the scrubber would cause particulate to drop out into a tank as the clean flue gas headed back up the ductwork and out the stack. There was a fan damper control that was modulated to maintain a negative pressure in the ductwork. And another damper control in the venturi throat that was adjusted to maintain a pressure drop. It was an ongoing challenge to keep it operating successfully. The other boiler had a baghouse for pollution control not in this picture, it perfomed much better.
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