The dust removal system on the asphalt mixing equipment basically uses a bag type dust removal system. Generally, the container type dust removal system is used more. The first level is an inertial dust collector, and the second level is a bag dust collector. The inertial dust collector collects large particles with a particle size of 40-50 μm. These large particles can be recycled as fine aggregate. The remaining dust-containing gas enters the bag-type dust collector for secondary dust collection. The collected particle size is 0.3 μm or more and 40 μm or less The dust particles can be recycled as ore powder, which not only achieves the dust removal effect, but also saves raw materials and meets the needs of customers.

Moreover, the bag type dust collector has a compact and beautiful structure and high dust removal efficiency. This uniquely designed two-stage bag filter has a large filtering area and is easy to clean. It has high and low temperature alarms and ultra-high temperature automatic protection devices. Adopt heat-preservation box, the bag uses the company's NOMEX fiber, non-woven needle-punched high temperature resistant, acid resistant filter material, and the dust emission concentration is less than 25mg/Nm3 or even lower.

However, as the price of fuel oil continues to rise, in order to reduce costs, the fuel of asphalt mixing plant was originally diesel fuel. Many manufacturers now use heavy oil, coal or other impurity oil as fuel, and heavy oil has high sulfur heavy oil, medium Sulfur heavy oil, low sulfur heavy oil, lead to more and more complicated smoke and smoke composition of asphalt mixing. According to the different working conditions produced by using different fuels above, different post-treatment of NOMEX needle punched felt filter material is adopted. The treatment method can greatly improve the dust removal efficiency and the service life of cloth bags.