The invention relates to a
brown coal upgrading-power generation co-production
system. The
brown coal upgrading-power generation co-production
system is characterized in that the
system comprises a raw
coal crusher and a
flue gas drier which is connected with the raw
coal crusher, a
coal outlet of the
flue gas drier is connected with a coal inlet of an intermediate wall type roller dryer, a gas inlet of the
flue gas drier is connected with a
flue gas outlet of a boiler through a pipeline, a gas outlet of the
flue gas drier is connected with a
flue gas treatment system, a heating unit
pipe bundle of the intermediate wall type roller dryer is connected with a
steam turbine through the pipeline, extracted steam from the
steam turbine flows through the heating unit
pipe bundle of the intermediate wall type roller dryer, dries raw coal in the intermediate wall type roller dryer and then is input to a heat
regenerative system through the pipeline, the dried upgrading coal is output through a conveyer device, and
tail gases output by the intermediate wall type roller dryer are used for preheating air supplied by a boiler in a
tail gas air boiler through the pipeline. For the
brown coal upgrading-power generation co-production system, flue gas discharged by the boiler is used for carrying out first-stage
drying on the brown coal in the flue gas drier, and then extracted steam from the
steam turbine is used for carrying out second-stage
drying on the brown coal, thereby enabling the brown coal to be at a higher
drying degree.