ECD - Model 61 -Automatic Boiler Blowdown Control System

The ECD Model 61 Boiler Blowdown System provides a reliable solution forthe continuous control of the surface blowdown rate for commercial and industrial boilers.

Boilers concentrate dissolved solids in the water as the boiler operates. The increasing concentration of dissolved solids (TDS) may cause damage to piping, steam traps and other process equipment. It can also form sludge in the boiler, which impairs boiler efficiency and heat transfer capability. To avoid these problems the boiler water must be periodically discharged, Blown Down, and replenished with fresh feedwater. There are two types of blowdown, surface blowdown pulls the water from the top to middle of the boiler while bottom blowdown removes the sludge from the bottom of the boiler.

The Model 61 Boiler Blowdown System is a rack mounted modular design that includes: a 316SSsedimenttrap, 316 SS sample cooler, temperature gauge, sample control valve and safety relief valve. Tubing and fittings are 316 SS.

The Conductivity (TDS) measurement is made with the Model C22 controller or one of the optional two wire transmitters, the T23 orT28, and the field proven Model CS10 conductivity sensor with 316 SS sensor body and integral preamplifier.

The Model C22 Controller is a line powered instrument with PID control functions, logic functions and timers. The standard instrument is supplied with one 4-20 mAoutput and two alarm relays, options include up to 4 outputs and 8 relays.

The Model C22 4-20 mA Output can be configured as a PID control output. The proportional/integral signal can modulate a control valve to keep the surface blowdown rate uniformly close to the maximum allowable dissolved solids level, regardless of load conditions. This lowers the operating costs of the boiler when compared to manual blowdown by minimizing the blowdown rate which lowers the fuel and make up water consumption. Timers in the C22can be configured to periodically trigger a relay for bottom blowdown which may only be needed on a weekly or monthly basis.

If a controller is not needed, the General Purpose NEMA 4X Model T23 two wire transmitter can provide a 4-20 mA signal to the DCS or PLC. The FM and CSA approved intrinsically safe and/or explosion proof Model T28 two wire transmitter and sensor can be used in hazardous locations.

• Panel Mounted System Plumb and Play Design
• Sample conditioner reduces temperature prior to the conductivity measurement
• Sludge trap for easy removal of sludge build up
• C22 Analyzer Capability

• Complete System, Easy Installation, Ready to Use
• Improves the accuracy and the longevity of the conductivity measurement
• Ease of Maintenance
• Local Display, 4-20 mA output, Alarm Relays, XY Graphical Plot