![]() ![]() Additionally, damper controls typically require more regular maintenance because they have more moving parts than variable speed/frequency drives. Disadvantagesĭamper control isn’t the most efficient method of controlling the flow of gas and air. Additionally, installing damper control will not materially impact floor space in a control room, and it does not require a foundation structure – meaning a wider range of plants can incorporate damper control without having to significantly alter or install infrastructure. Advantagesĭamper control is a very cost-effective method when the only consideration is the purchase price. ![]() This is an older method, but one that is still common across various systems and boiler types. ![]() One method is to use dampers to manage volumetric airflow. Failure to maintain draft control can result in excessive NOx emissions, among other things (such as higher operating cost and lower efficiency). The goal was to prevent positive pressure from being realized in the boiler, which could result in damage to the casing or injury to operators.Įven with today’s airtight boilers, though, draft control is needed – primarily due to flue gas recirculation for NOx control. These boilers weren’t airtight, and negative pressure was used to keep the furnaces cool. They were built with brick-set construction, which required operation at negative draft or balanced draft pressure. The Purpose of Draft Controlĭraft control originated due to the way boilers were constructed decades ago. Here, we’ll discuss the pros and cons of two particular methods: damper control and VSD/VFD control. Different methods have different advantages – and drawbacks – when it comes to flow control with mechanical draft fans. Methods and devices to control flow can have an outsized impact on power savings. Mechanical draft fans operating at peak efficiency will show superior performance, reduce costs, and maximize ROI.įor this reason, understanding how to efficiently control and operate these draft fans is of paramount importance to protecting a plant’s bottom line. They are utilized to force, induce, and boost fluid media throughout the system – and use a large amount of power in the process. Plants use mechanical draft fans to move airborne material through a system duct and components. ![]()
0 Comments
Leave a Reply. |