The system of industrial boiler waste heat and solar energy increasing the temperature of biogas digester

Abstract. In this paper, aiming at the problem of fermentation northern winter weather is not conducive to the biogas system, we have designed a set of Solar energy and industrial waste heat boiler flue gas complex warming systems to ensure that biogas systems in the winter can also be normal fermentation. This system solved the problem which we can’t make good use of the waste heat of Industrial boiler. By comparing the heat loss to the warming effect of biogas system, this system can ensure the stable operation of the biogas project. This paper provides a reference to construct new type of biogas digester in North China.