The invention relates to a
low vacuum ejector
heat pump composite waste-heat heating supply
system based on a huge temperature-difference
heat supply network, and belongs to the field of waste-heat
recovery type combined heat and power generation based on
low vacuum circulation
water heating and heat exchange of an ejector
heat pump. The
system is characterized by comprising an ejector
heat pump waste-heat
recovery device, a dead-steam direct
recovery device, a
pitch peak heater, a
heat supply network huge temperature-difference heat exchange unit and a
pipe fitting, wherein the dead steam is taken as a water-based load heat source of the
heat supply network; a cold-side inlet of the dead steam direct recovery device is connected with a water return
pipe of the heat
supply network; an outlet is connected with a heat
supply network water inlet of an ejector heat pump condenser; then the dead steam is sent to the
pitch peak heater to be heated to the required temperature, and then exhausted out; at last, the dead steam is sent into the dead-steam direct recovery device, and an ejection port in the ejection section of the ejector heat pump. The
system can be used for a thermal power
plant with higher efficiency than the conventional recovery way that waste-heat is extracted from cooling water, the utilization amount of the dead-steam
waste heat can be improved by more than 1-2 times, while the investment is only a part of that of an
absorption heat pump.