• Sludge Drying Disposal
  • Sludge Drying DisposalHuayi Heavy Industry Company is a professional manufacturer and supplier of sludge drying disposal equipment in ...

Sludge Disposal


Special sludge disposal equipment is a king of new drying machine developed on the base of single-channel rotary dryer. And it can dry sludge containing 50% to 80% moisture to 10% to 25% finished products.
Because the sludge is easy to agglomerate in the drying process, we have changed the shovelling plate of single-channel dryer. This special sludge drying equipment is designed with combination shovelling plate and self-washing device, which greatly enlarges the application areas of single-channel dryer. This new dryer can not only dry a wide variety of sludge, but also dry high-viscosity materials.
Huayi manufactures and supplies two kinds of sludge disposal equipment: sludge drying disposal machine and sludge making fertilizer system.


1.Sludge drying disposal:

Huayi has twelve types of sludge drying disposal machines, including sludge feed box, non-shaft screw conveyor, belt conveyor, sealing screw conveyor, sealing air equipment, sludge dryer, cyclone dust extractor, bucket elevator, product store box, belt measurement, cyclone dust extractor and air box pulse bag filter.

2.Sludge making fertilizer system:

our sludge making fertilizer system includes fermentation treatment, grinding and screening.

Work Principle of Sludge Disposal:

1.A feeding machine sends sludge to the feed guide of dryer, the feed zone as the first phase. And as the cylinder rotates, sludge is sent to an inclined shovelling plate, the pre-heating zone as the second phase, and then elevated to the center position of cylinder where the sludge is sprayed in cascade shape. This drying process is counterflow mode: hot resource air enters cylinder through discharging hole, and after fully heat exchange with sludge, the air becomes saturated with moisture in pre-heating zone, so it needs no more moisture but keeps a higher temperature. In that case, the air can pre-dry sludge with high moisture content in cylinder.
2. When sludge is sprayed and moves onto the moving grate-rake wing plate, the loose-raking heat exchange zone as the third phase, sludge fully contacts with the pre-heated wing plate, thereby heat exchange is completed. Meanwhile, the wing plate repeatedly elevates, spray and rakes sludge, which is conductive to fully heat exchange and then dewatering of sludge.
3. When sludge is sent to the fourth phase of crushing heat exchange zone equipped with arc-shaped material plate with cleaning device. The sludge is heated via the heated chain. As the cylinder rotates, sludge is elevated and sprayed by shovelling plate to make full heat exchange with hot air flow. Meanwhile, the cleaning device buried by sludge falls down along the inner side of arc-shaped shovelling plate, in which way sludge sticking to the inner side of shovelling plate can be removed. When the cleaning device followed the cylinder to pass the vertical line, it starts dragging behind the back of the arc-shaped shovelling plate so as to remove sludge sticking to the outer side of shovelling plate. The continuous rotation of cylinder can take some more moisture away from sludge. At the same time, the cleaning device is conductive to the crushing of sludge particles, as well as increases the specific surface area, thereby quickening the drying process speed.
4. When sludge arrives at the constant-speed heat exchange zone of the fifth phase, the viscosity of sludge has been greatly reduced, and moisture evaporation is table. Single-bending shovelling plate is used to shovel sludge in a large scale, and sludge is dewatered under stable status.
5. When processed sludge is sent to rapid heat exchange zone of the sixth phase, where the temperature is much higher than other zones, the loose sludge already dewatered can contact with hot air in a much larger scale via the help of double-bending shovelling plate. The heat exchange efficiency is increased and drying effects are enhanced too. In the end, the dried sludge slides to the discharging box to finish the drying process.