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Technical analysis of large-scale garbage shredder
The large-scale garbage shredder is mainly suitable for the following material processing:
Furniture: sofas, mattresses (including metal springs), wardrobes, tables and chairs, etc., the volume can be reduced by 30%-50% after shredding;
Wooden materials: building templates, wooden pallets, branches, etc., which can be used for recycled board manufacturing after crushing;
Metal products: bed frame steel wire, iron barrels, aluminum profiles, etc., the metal recovery rate can reach more than 90%;
Mixed garbage: composite materials containing fabrics (quilts, leather), plastics (barrels, pipes), which can be recycled through sorting;
Special waste: electronic casings (refrigerators, washing machines) and industrial waste (tires, packaging barrels).
The dual-axis design can efficiently process high-hardness and large-volume materials, and is suitable for the reduction of urban solid waste.

1. Pain points in the management of large urban waste
According to statistics, a single medium-sized city produces more than 500,000 tons of large waste (about 2 million sofas/mattresses) per year. The traditional landfill method not only occupies 3 times the volume of landfill space, but also takes more than 80 years for springs, sponges and other materials to degrade naturally. The emergence of double-shaft shredders has transformed these wastes into renewable raw materials within 30 minutes. Taking a Shenzhen environmental protection enterprise as an example, its TD-2000 equipment can crush a 1.8-meter-wide Simmons mattress into a mixture of metal wires and fibers <50mm, with a metal recovery rate of 92%, and the calorific value of textile fibers converted into RDF fuel is 4000kcal/kg.
2. Core technology innovation
1. Anti-winding blade shaft design:
The S-shaped Cr12MoV alloy blade (hardness HRC60) is used, and the 32,000 Nm shear force generated by reverse rotation can instantly cut off the spring steel wire in the mattress (tensile strength ≤1600MPa). The patented "knife shaft self-cleaning system" can automatically peel off the entangled fabric fibers, reducing the downtime and cleaning time by 70% compared with traditional equipment.
2. Intelligent sorting system:
Equipped with near-infrared sensors (NIR) and eddy current separators, metals (copper/iron), polyurethane foam and wood are separated at the same time during crushing, with a purity of more than 85%. Data from a processing base in Beijing shows that each ton of crushed mixed materials can be added by 300-500 yuan after sorting.

3. Noise reduction and shock absorption solution:
Through the hydraulic buffer device + soundproof cabin design, the operating noise is controlled below 85 decibels (equivalent to a busy street), meeting the requirements of nighttime operations in urban residential areas.
III. Reconstruction of the value of the industrial chain
Waste furniture that has been shredded:
• Metal parts → recycled raw materials for steel mills
• Wood chips → OSB board raw materials (replacing original wood)
• Textile fillers → cement kiln co-disposal fuel
The annual processing capacity of a single production line is 36,000 tons, creating a circular economy income of more than 20 million yuan.