The invention relates to an energy-saving type two-
tower stripping method for treating waste water containing
acid gas and
ammonia, which belongs to the technical field of waste
water treatment. The method comprises the following steps of: dividing the waste water which is to be treated and contains acid and
ammonia into a cold part and a hot part, and respectively introducing the cold part and the hot part into a deacidification
tower from the upper part and the middle upper part of the deacidification
tower of a stripping type waste
water treatment device, wherein
acid gas is introduced into an acid recoverer after being stripped from the top of the deacidification tower; collecting kettle
liquid waste water from the bottom of the deacidification tower; introducing the kettle
liquid waste water into a
deamination tower from the middle upper part of the
deamination tower so that ammoniac steam is stripped from the top of the
deamination tower; meanwhile, collecting kettle liquid from the bottom of the deamination tower. The heat used by a tower kettle
reboiler is derived from the ammoniac steam extracted from the deamination tower; the
sulfur residue quantity of the treated waste water is lower than 50mg / L, and the total
ammonia content is lower than 100mg / L; and the method provided by the invention has the advantages of simple and easily controlled process,
mature technology, low
processing cost and energy saving and can be widely applied to various occasions for treating the waste water containing acid and ammonia.