When applying pyrolysis technology to sewage sludge projects, the cost of the sludge pyrolysis plant is a significant issue. A sludge pyrolysis plant requires significant investment, encompassing a complete pyrolysis treatment system. This includes drying equipment, a feed system, a pyrolysis reactor, product separation equipment, and exhaust gas treatment equipment.
For some small sewage treatment plants or those in economically underdeveloped regions, the high cost of pyrolysis equipment can be a major barrier to the adoption of pyrolysis technology. The continuous sludge carbonization plant cost ranges from approximately $150,000 to $400,000 USD per daily ton of processing capacity. This means that a pyrolysis plant processing 100 tons of sludge per day could require an investment of between $15 million and $40 million USD.
Operating Cost of Sludge Pyrolysis Plant
Pyrolysis plant also has relatively high operating costs, primarily encompassing energy consumption, raw material consumption, equipment maintenance, and labor costs.
In terms of energy consumption, the pyrolysis process requires a significant amount of heat energy to heat the sludge to the required temperature for pyrolysis, and this energy cost accounts for a significant portion of operating costs. Mingjie continuous biomass pyrolysis plant utilizes the waste heat generated during the pyrolysis process to dry and preheat the sludge. This not only reduces reliance on external energy sources and lowers energy costs, but also reduces carbon emissions.
Raw material consumption primarily involves auxiliary materials such as desiccants and adsorbents. While the individual costs are relatively low, they can accumulate significantly over time.
Equipment maintenance costs are also not negligible. Pyrolysis equipment operates under harsh conditions such as high temperature and high pressure, making component wear and corrosion a concern. Regular maintenance and replacement are essential, increasing operating costs.
In terms of labor costs, the operation and management of pyrolysis equipment requires specialized technicians, resulting in relatively high labor costs.
