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The waste crusher based on large flow rate (up to 40t/h of household waste) can meet the crushing demand of large flow rate in normal flow rate and test stage. The designed power of the crusher is 250kW, the designed torque 2x66000N·m, and the maximum working pressure is 35MPa. Its control system uses Siemens PLC1500 as the control center, equipped with local display screen, ABB converter, and connected by Profinet bus communication. The control system realizes the alarm and interlock of the crusher by collecting the operation value of the primary instrument, ensuring its normal and reliable operation. Using modular programming and optimizing the core algorithm, the crusher runs more stably and reliably under different working conditions. According to the different amount of upstream incoming material, the frequency converter is adjusted to make the waste crusher run at different speeds, so as to achieve the goal of environmental protection and energy saving.