The Client contacted us explaining that he was installing a biogas plant and wanted to utilise raw biogas to generate heat for his current business needs.
Following investigations on the site’s heat requirement, we identified a seasonal and variable heat demand which would require good modulation and control of heat delivery.
We designed the system that would integrate with existing heat used to offset current heating costs and deliver additional heat for woodchip drying so that the client could dry his own woodchip fuel for his existing biomass boilers.
The existing systems had various heat sources running at different temperatures and pressures, so we had designed a system that would interface without causing issues with existing infrastructure.
The biogas plant takes chicken litter and cow slurry, along with agricultural sileage to produce the raw biogas. This feedstock causes a high level of H2S in the raw biogas and so required scrubbing to protect the longevity of the boilers. We designed a 2 cubic meter carbon filter to pre-condition the gas to a safe level of H2S.
Biogas is a saturated gas and so carries a high level of moisture. This moisture can cause damage to the boiler and plant equipment. We designed and installed a gas chiller to remove high levels of this moisture before it entered the boiler gas line.
The seasonal usage and process batch heat usage on site required a heat network and delivery system that was flexible and provided maximum control. All zones had independent variable speed pumps installed, along with class 2 heat meters to provide accurate visualisation of heat usage and demand.