The present application relates to the technical field of grain
processing, in particular to a grain harvesting and
straw comprehensive utilization
system, which comprises a mobile grain harvesting and
drying module connected with a
straw pretreatment module, a
biogas fermentation module, a
biogas purification and
liquefaction module, an intelligent mixing and
grid connection module, a byproduct
resource utilization module and a poultry
organic manure biogas fermentation module in sequence, forming an energy
closed loop comprehensive utilization method. The grain harvesting and
straw comprehensive utilization
system of the present application is provided with a built-in real-time gas
quality monitoring and dynamic proportioning
system, and an intelligent
algorithm is used to automatically adjust the
mixing ratio (1:4-1:9) of biogas and pipeline
natural gas according to the purity of biogas (97%-99%), so that the calorific value of the
mixed gas is stabilized at 33.5-36.8 MJ / m³, which is suitable for the urban pipeline network standard. Through the integrated dry desulfurization-membrane separation
decarburization-
methane residue
fertilizer integrated unit, the H2S removal rate is greater than or equal to 99.9%, the CO2
recovery rate is greater than or equal to 92%, and the
methane residue
organic fertilizer conversion rate is 100%, so that the full amount of
agricultural waste is realized.