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Waste heat utilization scheme of biogas generator

Waste heat utilization scheme of biogas generator

2020-07-29

(1) Hot water type.The waste heat of biogas generator can produce hot water at 90℃ or even higher temperature.This form can be used in northern areas where heating is needed.


(2) Smoke type.The waste heat of flue gas combined with absorption refrigerating unit can provide cooling source load.


(3) Steam type.The waste heat of flue gas can be used to produce saturated steam or superheated steam, but the capacity of biogas generator unit is small, and the steam output is small.



(4) Power generation type.The waste heat of biogas generator is used to generate electricity with screw expansion power generator.A 1MW biogas generator unit can be configured with a 70KW screw expansion power machine to generate electricity by exhaust smoke and waste heat.The waste gas and heat generated by gas generator set can be used for refrigeration and heating.In summer, flue gas heat is used, while in winter, the cooling water of the generator unit is mainly used.The main process in winter: one part USES the cooling water of the generator set to send to the indoor system; the other part USES the water generated by the smoke-water heat exchanger for secondary heat exchange as the supplement of heat load.The waste heat produced by 1 500GF1-RZ unit can satisfy the cooling of an area of 6000 square meters and the heating of an area of 15000 square meters.In this way, the comprehensive utilization rate of biogas can reach about 80%.


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