The invention discloses an energy-saving and water-saving
flue gas
treatment system. The energy-saving and water-saving
flue gas
treatment system has the advantages that a
liquid storage unit is arranged in an absorption device of the energy-saving and water-saving
flue gas
treatment system, an inner cavity is divided into a first glue gas treatment zone and a second
flue gas treatment zone by theliquid storage unit,
flue gas can flow into the absorption device from the bottom of the absorption device and can be in countercurrent contact with concentrated solution sprayed from the top of theabsorption device,
moisture in the
flue gas can be absorbed by concentrated solution in the second flue gas treatment zone, the concentrated solution in the second flue gas treatment zone can be diluted,
latent heat released in
moisture phase change procedures can be separated out, and the glue gas and the concentrated solution can be heated until the temperatures of the flue gas and the concentrated solution reach 55-65 DEG C; heated concentrated solution can be led out via the
liquid storage unit and can be fed into a first
heat exchanger, heat exchange can be carried out on the heated concentrated solution and heat exchange media (such as heat network water), the heat exchange media can be heated by the temperatures of 3-10 DEG C, the concentrated solution can be cooled until the temperature of the concentrated solution is approximately consistent with the temperature of a solution inlet in the top of the second flue gas treatment zone, then the concentrated solution can be fed intothe first flue gas treatment zone, and
moisture in the flue gas can continue to be absorbed;
cascade heat exchange is adopted for the first time, accordingly, the heat exchange quality can be effectively enhanced, and
sensible heat in the original flue gas and
latent heat in
water vapor of clean flue gas can be deeply recycled and can be utilized.