Application background

Municipal Sewage Treatment plant sludge and residue produced in industrial processes (pharmaceutical and chemical industries, etc.) are of small amount, dispersed. To dispose of in a centralized manner, transportation costs are relatively high, and it is only economical to incinerate with a large processing scale. In-place treatment is the best way to reduce operation costs. As the raw material is single, pyrolysis is a good choice to process this kind of waste.


Process introduction

The sludge (moisture content above 30% needs to be pre-dried) is first feed into the drying furnace for heating and drying. The moisture content of the sludge after drying can be controlled in the range of 15-30%. The main products of pyrolysis are high-temperature carbides and high-temperature gas volatiles. The pyrolysis time is adjusted according to the demand. The high-temperature carbides are discharged automatically after being cooled by a carbon-cooling device, the high-temperature gas volatile mixture is separated, the oil reformed and cracked for reuse. The syngas is purified, then be used for heating the pyrolysis system, and the surplus gas can be used as an energy source.

Schematic diagram

Advantages of sludge pyrolysis system

● No dioxin, fly ash, and other toxic substances generation, more environmental friendly emissions.
● Low investment costs, low project implementation difficulty.
● Considerable reduction of waste volume and amount, final product easy to dispose of.
● Safe and reliable operation with little environmental impact.
● Widely applicable to municipal sludge, organic sludge, and oil sludge.