PJEP shaftless screw conveyor adopts innovative centerless design, which completely solves the transportation problem of high viscosity and easy-to-entangle materials (such as sewage grille slag, dewatered sludge cake). With the fully enclosed structure and mirror-polished spiral surface, it achieves zero leakage and zero pollution, meeting strict environmental protection requirements. The equipment is developed based on JB/T679-95 standard, equipped with 304 stainless steel or wear-resistant alloy steel, can withstand 100℃ high-temperature materials, with a maximum inclination angle of 30°, and is suitable for complex working conditions and installation requirements. The low-speed and high-torque operation mode reduces energy consumption by 15%-20%, the modular design supports flexible customization of 2-80t/h processing capacity, and the 5-minute quick-disassembly cleaning structure greatly reduces maintenance costs. It is now widely used in municipal sewage treatment, industrial sludge transfer and solid waste resource projects, providing integrated conveying solutions for grille slag dehydration, 5-year warranty for core components, 24-hour technical support, free material analysis and 3D conveying solution simulation services, providing efficient, durable and reliable options for environmental protection projects.