What is the working principle of a half-wet material crusher?

As a core equipment for processing high-humidity and high-viscosity materials, the half-wet material crusher is widely used in organic fertilizer production, municipal sludge treatment, and agricultural straw processing. Its core design concept is to overcome the limitations of ordinary crushers in handling wet materials prone to sticking and clogging, achieving efficient crushing through the synergistic effect of multiple structures. The following will explain its working principle in detail.

The first step is material pre-treatment and conveying. Semi-wet materials (such as livestock and poultry manure, humus, wet straw, etc.) enter the equipment through the feeding hopper. The screw feeding device at the feeding port can uniformly control the feeding speed to prevent material accumulation. At the same time, some models are equipped with a pre-drying spray device to slightly reduce the surface moisture of the material, or use a heating plate to soften the material's viscosity, laying the foundation for subsequent crushing and preventing material adhesion to the inner wall of the conveying channel.

The core crushing process adopts a "impact + shear + grinding" composite crushing mechanism. After the material enters the crushing chamber, the high-speed rotating rotor drives the circumferentially distributed hammers to perform centrifugal motion. The hammers violently impact the material, initially crushing large pieces of material. The toothed plates on the inner wall of the crushing chamber and the hammers move relative to each other, generating a shearing effect on the material, further refining the particles. For viscous materials, the inside of the crushing chamber uses a wear-resistant and anti-sticking coating, and the airflow generated by the high-speed rotation of the rotor promptly carries away the finely crushed material, preventing sticking and accumulation.

Classification and screening with circulating crushing ensure uniform output particle size. The initially crushed material enters the classification area and is screened through a built-in screening device (such as a grate or impeller classifier). Materials that meet the particle size requirements are discharged through the sieve holes, while coarse particles that do not meet the standard are returned to the crushing chamber for secondary crushing under the action of airflow and gravity until they meet the preset particle size standard.

Throughout the entire working process of the half-wet material crusher, the power system provides stable power for the rotor, feeding device, etc., and the heat dissipation system promptly dissipates the heat generated during equipment operation, ensuring continuous and efficient operation of the equipment. This multi-stage collaborative design precisely solves the problem of crushing semi-wet materials, enabling efficient crushing and resource utilization of the materials.