Concrete plant owners and operators know the difficulties of dust collection. From the first startup permitting and paperwork related to the dust produced at concrete plants through the ongoing maintenance and replacement of dust filters and equipment years once you have experienced business, dust collection and suppression is an important 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 could have various agencies that you might want to manage including local zoning authorities, DNR, EPA and others depending in your location. Fortunately the apparatus employed for collecting and suppressing dust related to concrete plants has continued to boost and is now very effective.
Dust collection and suppression should be considered at a number of different areas of the concrete plant. Some owners will put equipment to get and control dust in every area where it can be created. Others owners will simply put the collection equipment where it is totally required. Many owners use more dust collection equipment then required because they would like to be environmentally friendly, appease opponents, or for other reasons. Ultimately your choice on what type of dust collection equipment you will need is dependant on that which you are attempting to accomplish and what type of concrete plant you have.
At ab muscles 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 abbattimento delle polveri in aria in a bulk tanker it is pneumatically blown from the tanker in to the silo. A silo being filled by way of a bulk tanker with no venting system standard of all silos looks as although the silo is on fire. Cement, fly-ash and slag (the most frequent materials in silos at concrete plants) are aerated commodities. This means that when air is introduced in to the material it becomes lighter and flows easier. When these materials are pumped in to the silo’s from the tanker the dust collector keeps the materials from flowing into the environment looking like a thick smoke. In the event of silo dust collectors they actually provide operators with a price savings as it keeps them from losing wide range of materials being delivered.
Another common area for dust collection equipment is where the materials discharge in to the mixer. Precast and product plants will commonly have a dust collection system integrated with 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. The areas that are often equipped with dust collectors include weighing hoppers such as 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 location moist and dust in check as trucks travel through.
Obviously understanding the areas on and around your concrete plant that are problem areas for dust creation as well us knowing what the environmental 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 work with a different dust collector for each and every area they need to control. Central dust collectors may also be available that use ducting systems to get dust from multiple areas and vent it to just one centralized dust system. Some concrete plants use a mix of systems. There isn’t necessarily the right or wrong system, it is merely selecting the appropriate system for the application.