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Boiler Controls - Drum Level Control
Water problems are responsible for 90% of boiler accidents.
DrumPAK drum level control is 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 a DrumPAK drum level controller 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 drum level control system more than pays for itself when
it prevents just one shutdown per year.
The DrumPAK drum level and feedwater controller is a pre-enginereed, pre-configured package that includes a pre-programmed controller and application-specific installation, startup and operation manuals. DrumPAK comes ready to install, with only a few parameters to enter from the front face of the controller to get up and running. It can be installed as a standalone system or used in conjunction with other SteamPAK systems for total boiler control and efficiency improvement. |
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DrumPAK is ready to use as a single, two-element or three-element controller as standard; simply enable the desired strategy during controller setup. Furnace pressure (draft) control, fuel totalization and economizer monitoring are available as options. Modbus RS-485 communication is standard. Data Sheet
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Single-Element Drum Level Control
This 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 allows easy upgrade to two- or three-element control in the field simply by adding the measurement device and selecting the new control strategy.
Two-Element Drum Level Control
With the addition of steam flow measurement, DrumPAK 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.
Three-Element Drum Level Control
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. When set up for 3-element control, DrumPAK 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.
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Drum Level Control Strategy Selection Guide
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If you know which SteamPAK package you need, click here
For help selecting a package, or if the standard SteamPAK systems don't fit your needs, click here
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