Major Components: Ductwork

Ductwork connects the precipitator with upstream and downstream equipment. The design of the ductwork takes into consideration the following:

  1. Low Resistance to Gas Flow “ Achieved by selecting a suitable cross-section for the ductwork and by installing gas flow control devices, such as turning valves and flow straighteners
  2. Gas Velocity Distribution “ Gas flow control devices are used to maintain good gas velocity distribution
  3. Minimal Fallout of Fly Ash “ Fallout can be minimized by using a suitable transport velocity
  4. Minimal Stratification of the Fly Ash “ A suitable transport velocity also reduces fly ash stratification in the gas stream
  5. Low Heat Loss “ The goal is to reduce the heat loss of the flue gas to a level that will prevent acid or moisture condensation in the downstream equipment, requiring the use of thermal insulation protected by external siding.
  6. Structural Integrity “ Ductwork structure supports its total load, including wind and snow loads. The design also allows for accumulated fly ash, negative/positive operating pressure, and gas temperature. Expansion joints are used to accommodate thermal growth.

 

Helpful Resources

KnowledgeBase: Gas Distrbution Systems

KnowledgeBase: Improve Flow Distribution

KnowledgeBase: Introduction to ESP

Our Capabilities: Emissions Compliance Planning & Management

Our Capabilities: Gas Flow & Fluid Dynamics Modeling

Go Back

SmartAsh Case Study

SmartAsh Case Study

A large power generation plant needed to improve its fly ash evacuation system and turned to Neundorfer. The system, serving 20 hoppers on three separate precipitators, was upgraded without requiring an outage. ...

Read the White Paper

"We now have a lot more information about the system and its operation, allowing us to solve problems more quickly and operate more efficiently."

System Owner

Coal-Fired Power Plant

Back to Top