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Boiler control integrators

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Water problems are responsible for 90% of boiler accidents.

DrumPAK is a series of packages designed to provide significant improvements in maintaining boiler drum water level, stabilizing the effects of feedwater pressure changes, and responding to plant load changes. Installing DrumPAK can significantly reduce or eliminate boiler shutdowns due to drum level or feedwater pressure. DrumPAK not only helps prevent loss of valuable production time and materials, but increases the safety of your boiler. A DrumPAK system more than pays for itself when it prevents just one shutdown per year.

DrumPAK drum level and feedwater control systems are pre-enginereed, pre-configured packages that include instrumentation, pre-programmed controllers, and application-specific installation, startup and operation manuals. A DrumPAK package comes ready to install, with only a few parameters to enter from the front face of the controller to get up and running. Available for single-, two-, and three-element control, they can be installed as standalone systems or used in conjunction with other SteamPAK systems for total boiler control and efficiency improvement.

 

DrumPAK-1  Single-Element Control                                                     Data Sheet
DrumPAK-1 is an easy and economic way to upgrade on-off level control to continuous control to reduce wear and tear on feedwater pumps and motors, and ensure a more consistent control around setpoint on smaller boilers, boilers with slow load changes, or systems without steam flow measurement. Only level measurement is required. DrumPAK-1 can be easily upgraded to two- or three-element control in the field as additional measurement devices are added.

DrumPAK-2 Two-Element Control                                                         Data Sheet
With the addition of steam flow measurement, DrumPAK-2 provides “shrink” and “swell” compensation and better response to load changes. The controller calculates the feedwater flow requirement based on level, and uses the Steam Flow signal from a flow transmitter or vortex meter as a feedforward signal to anticipate the effect of steam demand changes on level.

DrumPAK-3 Three-Element Control                                                     Data Sheet
A three-element system adds measurement and control of feedwater, which allows the system to compensate for variations in feedwater pressure and
valve linearity. Variations in feedwater pressure result in significant changes in drum pressure, drum level and water temperature, causing the boiler to increase its firing rate and expend more energy as it attempts to recover full power. DRUMPAK-3 protects against this as well as reducing boiler trips due to unstable feedwater pressure. Large boilers or those with large or rapid load changes benefit most from a 3-element control system.

 

Drum Level Control System Selection Guide

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