The invention relates to a mud
drying system and a use method thereof. The mud
drying system comprises a transcritical
heat pump auxiliary heat supplying loop, a
heat pump auxiliary heat supplying loop, an
air heating and
waste heat recovering loop and a hot
water circulation loop; the transcritical
heat pump auxiliary heat supplying loop comprises an
evaporator, an internal
heat exchanger, a compressor, a
gas cooler and a
throttle valve; the heat pump auxiliary heat supplying loop comprises an
evaporator, a
wastewater and
waste heat recovering
evaporator, an internal
heat exchanger, a compressor, a condenser, a
throttle valve, two stop valves and a
wastewater tank; the
air heating and
waste heat recovering loop comprises a hothouse, an
air compressor, a gas discharging and carrying port, a first evaporator, the other evaporator and a condenser; and the hot
water circulation loop comprises a pump, a hothouse and the condenser in the heat pump auxiliary heat supplying loop. The invention adopts the hothouses to obtain
solar energy to heat mud and utilizes the transcritical heat pump auxiliary heat supplying loop and the heat pump auxiliary heat supplying loop to recover the
sensible heat and the
latent heat in humid air to heat mud, thereby lowering the
energy consumption for
drying the mud. The invention can be widely applied to various mud
processing fields.