A baghouse dust collector is often called the “lungs” of an asphalt plant, but you already knew that! What you may not know is how an inefficient baghouse can impact your plant’s production. When airflow is restricted or filtration performance declines, production can suffer.
What can you do to make sure your baghouse is running efficiently? Here are three easy checks to ensure your baghouse performs at its best.
1. Is Your Baghouse Dust Collector Properly Sized?
First, check the proper size (when it comes to asphalt plants, this DOES matter!). If the sizing is too small, it can restrict production. If the sizing is too large, it can make it difficult to get the desired baghouse temperatures. As a general sizing guideline, an asphalt plant may require approximately 200 CFM per ton of material produced, assuming 5 percent composite moisture in your materials. For example, a 400-ton-per-hour plant requires an approximately 80,000 CFM baghouse.
2. Are Air Leaks Affecting Your Baghouse Performance?
Second on the checklist are system leaks. How do you know if your baghouse is leaking? Check for leaks all the way back to the drum, and make sure your drum seals are functioning. Check all drum openings to make sure they are sealed as well as possible. Think of it like this: “A baghouse is like a vacuum cleaner, and the ductwork/drum are essentially the suction hose.” A leak in the hose reduces suction capability, which ultimately reduces your CFM. A poorly sealed system is inefficient, as leaks steal air from the baghouse.
3. Are Worn Filter Bags Restricting Performance?
The last check is bag life. Nobody wants to work with an old bag! Bag condition is important because it is your filtering media. Old, worn-out bags may not get clean enough, resulting in a high pressure drop that reduces production. This may become evident when cleaning cycles fail to reduce the pressure drop to an acceptable operating level. Extending bag life depends on a properly tuned/adjusted burner and keeping baghouse temperature within the recommended operating guidelines. Operating with a functional set of bags supports production, just as precoating or pretreating new bags extends life.
Keep Your Asphalt Plant Breathing Easy
A baghouse dust collector may seem like a simple component in an asphalt plant, but it remains vital. You can’t breathe properly without functioning lungs, and your asphalt plant can’t perform at a high level without a well-maintained baghouse.
An asphalt plant has many important elements, and preventative maintenance can go a long way toward ensuring they work together productively. Proper sizing, a tightly sealed exhaust system, and well-maintained filter bags all contribute to consistent airflow and production performance. You can breathe easier knowing a properly maintained baghouse can be a key part of high-performing asphalt plant production.
If you’re experiencing persistent airflow or production problems, explore CWMF’s baghouse dust collectors or contact our equipment team to discuss your plant’s requirements.
