Concrete plant owners and operators know the difficulties of dust collection. From the original startup permitting and paperwork related to the dust produced at concrete plants through the ongoing maintenance and replacement of dust filters and equipment years after you have held it’s place in business, dust collection and suppression is a significant element of the system. The laws and rules regarding dust collection and suppression requirements vary town by town, county by county and even state by state. Additionally you might have various agencies that you might want to cope with including local zoning authorities, DNR, EPA and others depending on your own location. Fortunately the gear used for collecting and suppressing dust related to concrete plants has continued to improve and has become very effective.
Dust collection and suppression must be considered at several different areas of the concrete plant. Some owners will put equipment to collect and control dust in most area where it can be created. Others owners will only put the collection equipment where it is absolutely required nebulizzazione ad alta pressione. Many owners will use more dust collection equipment then required because they wish to be eco-friendly, appease opponents, or for other reasons. Ultimately your choice on what type of dust collection equipment you will need is founded on everything you want to accomplish and what type of concrete plant you have.
At the minimum concrete plants can be purchased standard with a dust vent on the cement silos, usually a number of per compartment. When cement is delivered in a bulk tanker it is pneumatically blown from the tanker to the silo. A silo being filled by way of a bulk tanker minus the venting system standard of all silos looks as although silo is on fire. Cement, fly-ash and slag (the most typical materials in silos at concrete plants) are aerated commodities. Which means that when air is introduced to the material it becomes lighter and flows easier. When these materials are pumped to the silo’s from the tanker the dust collector keeps the materials from flowing into the environment looking such as a thick smoke. In the event of silo dust collectors they really provide operators with a price savings as it keeps them from losing massive amount materials being delivered.
Another common area for dust collection equipment is where the materials discharge to the mixer. Precast and product plants will commonly have a dust collection system integrated using their plant mixers. Ready mix plants frequently have a dust collection system that helps contain and control the dust around where the truck connects with the plant. Other areas which are often designed with dust collectors include weighing hoppers like a cement batcher. Some locations are even forced to regulate the dust from trucks on gravel drives and areas using water trucks to help keep the area moist and dust in check as trucks travel through.
Obviously understanding the areas on and around your concrete plant which are problem areas for dust creation as well us knowing what environmentally friendly and zoning requirements related to dust are among the most important factors in selecting dust collectors and suppression equipment. Another important factor is developing the strategy for controlling the dust. Some plants use a different dust collector for every area they need to control. Central dust collectors may also be available that use ducting systems to collect dust from multiple areas and vent it to an individual centralized dust system. Some concrete plants use a combination of systems. There isn’t necessarily a right or wrong system, it is simply selecting the proper system for the application.