Boiler Blowdown System

This assembly is for monitoring the tube blowdown from two boilers. Boiler tubes are blown down to reduce the concentration of solids and solid deposits on the tubes. Water conductivity is used to measure the percent of solids. Typical conductivity targets for boiler blowdown applications range from 1000 to 4000 micro Siemens per centimeter square.

Non-contacting conductivity was selected for durability of the sensor. An enlarged pipe section is used to accept the torroidal conductivity probe with built-in temperature sensor. Alternately, 871FT Industrial Flowthrough sensors may be used with the added advantage of inline calibration. Cooling coils cool the blowdown sample before contacting the probe. The probes are rated for use at 390° F.

Advantages:

• Single purchase order for complete system
• Assembly and testing by factory trained technicians at Mead O'Brien, Inc.
• Delivered ready for installation with no further assembly

Available options:

• Winterization package designed and assembled by Mead O'Brien, Inc.
• Contacting conductivity to monitor returned condensate for boiler feedwater

Bill of Materials:

(2) Foxboro 870 ITEC, Loop powered transmitter
(2) Foxboro EC-HPO, Conductivity probe
(2) O'Brien FP52
(2) Dual tube sample coolers
(2) Carbon steel tee with flanges and probe flange
(6) Jamesbury ball valves

© 2001 Mead O'Brien, Inc.