The invention belongs to the field of treatment of
coal chemical
wastewater and
waste gas, and particularly relates to a conversion unit high
ammonia nitrogen acid condensate pretreatment
system and aconversion unit high
ammonia nitrogen acid condensate
pretreatment method. According to the present invention, a
coal gasification conversion unit circulating water
heat exchanger is replaced with adeineralized water
heat exchanger, the deineralized water is used as a heat medium to recover heat and reduce the circulating water field load, the temperature of a steam stripping liquid at a separation
tower inlet is raised to 100-138 DEG C, and acid condensate (containing high
ammonia nitrogen)
sewage wastewater is pretreated in the separation
tower by using a steam-like steam stripping method,such that the dissolved gases (high
ammonia nitrogen materials and the like) in the
liquid phase are gasified and separated as much as possible; and the results show that the total amounts of the high
ammonia nitrogen materials, the organic matters and the
sulfur-containing compounds in the
gas phase is greatly increased, and the
liquid phase finally enters the a biochemical unit at a low total amount of less than 50 kg / h, such that the treatment load of the biochemical unit is achieved so as to ensure the standard
discharge after the biochemical treatment.