2026/07/03
Source Suppression: Install enclosed screw feeders at the inlets of crushers (especially for semi-wet material crushers and cage crushers) to reduce the material drop height; install material guide chutes and rubber curtains at belt conveyor transfer points to minimize induced airflow. At the dryer discharge end, a gravity settling chamber can be installed to utilize sudden changes in airflow velocity, allowing coarse dust particles to settle naturally for recovery.
In-Process Collection: Install enclosed dust-collection hoods at dust-generating points—such as screening machines, mixers, and packaging machines—and connect them to a pulse-jet bag filter. Bag filters can achieve collection efficiencies exceeding 99% and keep emission concentrations below 20 mg/m³, meeting environmental standards. It is recommended to use water- and oil-repellent filter bags suitable for the high-moisture, high-stickiness characteristics of organic fertilizer materials, and to equip the system with an automatic pulse-jet cleaning mechanism to maintain filter bag permeability.
End-of-Line Purification: For the hot, humid dust in dryer exhaust gas, a combination of a cyclone dust collector and a spray scrubbing tower can be installed to simultaneously remove dust, lower the temperature, and eliminate odors. The spray water is recirculated, and the settled sludge can be returned to the mixer as a liquid additive for granulation, achieving a closed-loop material recovery process.
Operational Management: It is recommended to inspect the integrity of filter bags monthly and replace damaged ones promptly; clean accumulated dust from duct elbows quarterly; and maintain dust emission monitoring records to ensure long-term regulatory compliance. Implementing these measures can reduce the overall material loss rate from 5%–8% to 1%–2% while significantly improving the workshop working environment.