How to Control Dust for Asphalt Mixing Plant?

Question

Accepted Answer

In response to the dust problem arisen from the daily operation of asphalt mixing plant, the following measures can be considered:

Install dust collection equipment: Install dust collection hood at the discharge port of the mixer. The hood is semi-closed, which can significantly reduce the overflow of asphalt smoke. Dust collection devices can also be installed in other equipment and areas that may generate dust, such as cold feeders and belt conveyors.
Water spraying: Use a water spraying system to reduce dust during mixing. As for this system, nuzzles can be installed at appropriate locations to spray water mist, suppressing the dispersion of dust.
Seal equipment and pipelines: Equipment and pipelines that may generate dust can be sealed to reduce dust leakage. For example, install sealing covers on cold feeders, belt conveyors, or seal pipelines.
Dust collection and treatment: Set up dust collection equipment such as dust collectors and dust collection tanks to collect and process generated dust so as to avoid pollution.
Strengthen cleaning and maintenance: Clean equipment and areas regularly, remove accumulated dust in a timely manner, and maintain normal operation of equipment and dust control.
These measures can effectively reduce the dust generated by asphalt mixing plants, while protecting the environment and the health and safety of workers.

D&G machinery sealed asphalt mixing plant job site

Below the main types of dust collection equipment for dust control in asphalt mixing plants:

1. Cyclone dust collector: Cyclone dust collector is a device that uses centrifugal force to separate dust, which is suitable for handling dust with larger particle sizes. In asphalt mixing plants, this filter is often used to handle dust generated by equipment such as cold feeders and belt conveyors.

2. Bag filter: Bag filter is a device that uses filter bags to filter and separate dust. It is suitable for handling dust with smaller particle size. In asphalt mixing plants, bag filters are usually adopted to deal with the asphalt fume generated at the discharge port of the mixer.

3. Electrostatic precipitator: An electrostatic precipitator is a device that uses an electric field to collect and separate dust. It is suitable for processing gases with high temperature, high humidity, and high dust content. In asphalt mixing plants, electrostatic precipitators are frequently used to treat asphalt fumes emitted from chimneys.

4. Wet dust collector: Wet dust collector uses water film to collect and separate dust, suitable for processing gases with high humidity and high dust content. In asphalt mixing plants, wet dust collectors are often adopted to handle dust generated by equipment such as cold feeders and belt conveyors.