Rotary Drum Dryer
Safe, economical drying and granulation of municipal sludge to produce Class A biosolids.
- Company NameHAARSLEV INDUSTRIES SDN BHD
The Haarslev Rotary Drum Dryer for Sludge is a directly fired, single pass, rotary drum drying system with advanced sizing screening and granulation techniques producing a dust free granule suitable for reuse in agriculture and as fuel.
The system features process gas recirculation with a unique indirect condensing heat exchanger to minimise effluent retreatment in the WWTP and also minimise the off-gas volume sent to odour control.
The drying system is offered as a complete system including the latest in safety enhancements in full compliance with NFPS/ATEX regulations and includes a sophisticated process control system for both safety compliance and the possibility of unattended operations at night.
The rotary drum dryer is a direct-fired hot air cascading type of dryer, which dries sludge to between 90 to 95 % dry solids. The material is gently dried as it cascades through the hot air flow.
The hot air stream is provided by a direct-fired gas burner normally operating with natural- and bio-gas. This generates high inlet temperatures for rapid surface heating and immediate pathogen destruction. The process maintains a safe low oxygen atmosphere inside the dryer loop. Recirculation of hot gas reduces thermal energy consumption.
The Haarslev Rotary Drum Dryer has a minimum of moving parts, which means reduced wear, less maintenance and increased operating life.
A range of fuels including natural gas, synthesis gas, methane, LPG, oil, coal or bio-gas can be used. It can also be supplied with indirect heating systems utilising waste heat from e.g. turbine exhaust gases.
ADVANTAGES
High yield and low capital cost.
Meets international pathogen log reduction standards
Gently drying process ensures a high quality end product.
The system features process gas recirculation with a unique indirect condensing heat exchanger to minimise effluent retreatment in the WWTP and also minimise the off-gas volume sent to odour control.
The drying system is offered as a complete system including the latest in safety enhancements in full compliance with NFPS/ATEX regulations and includes a sophisticated process control system for both safety compliance and the possibility of unattended operations at night.
The rotary drum dryer is a direct-fired hot air cascading type of dryer, which dries sludge to between 90 to 95 % dry solids. The material is gently dried as it cascades through the hot air flow.
The hot air stream is provided by a direct-fired gas burner normally operating with natural- and bio-gas. This generates high inlet temperatures for rapid surface heating and immediate pathogen destruction. The process maintains a safe low oxygen atmosphere inside the dryer loop. Recirculation of hot gas reduces thermal energy consumption.
The Haarslev Rotary Drum Dryer has a minimum of moving parts, which means reduced wear, less maintenance and increased operating life.
A range of fuels including natural gas, synthesis gas, methane, LPG, oil, coal or bio-gas can be used. It can also be supplied with indirect heating systems utilising waste heat from e.g. turbine exhaust gases.
ADVANTAGES
High yield and low capital cost.
Meets international pathogen log reduction standards
Gently drying process ensures a high quality end product.
