2026/06/09
Dust from half-wet material crusher(compost crusher) primarily originates from the feeding, crushing chamber, discharge, and equipment gaps. Considering the high moisture content of the materials, comprehensive management can be implemented through four aspects: sealing, negative pressure dust collection, material pretreatment, and operational control.
First, strengthen the overall machine sealing. Install flexible dustproof cloth covers and buffer hoppers at the feed inlet to reduce material drop and prevent dust from being carried upwards by airflow. Replace the sealing strips on the machine body inspection doors, flange interfaces, and shaft ends with corrosion-resistant rubber, and fill gaps with sealant. Add a dust baffle to the main shaft head to prevent dust leakage through the shaft gaps. Connect a sealed chute to the discharge port for fully enclosed conveying, eliminating bottom dust leakage.
Second, implement a negative pressure dust collection system, which is the core method. Install air collection hoods at the crushing chamber, feeding, and discharge points, connected to bag filters, to create a negative pressure environment. During operation, dust is promptly sucked away, preventing outward diffusion. To address the issue of filter bag clogging caused by high-moisture materials, anti-stick membrane filter bags are selected, paired with a pulse cleaning device to ensure stable dust removal efficiency.
Then, material pretreatment is crucial. Strict control of raw material moisture content is essential, maintaining it within the 30%–50% range. Excessively dry materials easily generate dust, while excessive moisture leads to equipment clogging. Large pieces of material are broken up beforehand to reduce dust generation during crushing, and dry, hard impurities are screened out, reducing dust generation at the source.
Finally, standardized operation and daily maintenance are necessary. Feeding speed is controlled to avoid sudden pressure changes and dust surges caused by large amounts of material being fed at once. Seals and ducts are regularly inspected for damage and leaks, and repairs or replacements are made promptly. Dust collection pipes and filter bags are cleaned of accumulated material to prevent duct blockage and failure. After comprehensive modifications, on-site dust levels are significantly reduced, improving the working environment and reducing dust corrosion of bearings, oil seals, and other components, extending the service life of fertilizer production machine.
