The invention discloses a
liquid ammonia evaporator and a
liquid ammonia evaporation system for
flue gas denitration, wherein the
liquid ammonia evaporator comprises a heat exchange chamber and a stainless steel heat exchange
pipe which is arranged in the heat exchange chamber; the heat exchange chamber consists of a lower heat exchange chamber and an upper heat exchange chamber; a denitrated
flue gas inlet is arranged at the top of the lower heat exchange chamber and a denitrated
flue gas outlet is arranged at the bottom of the lower heat exchange chamber; a hot air inlet is arranged at the bottom of the upper heat exchange chamber and a hot air outlet is arranged at the top of the upper heat exchange chamber; the stainless steel heat exchange
pipe comprises a primary heat exchange
pipe which is arranged in the lower heat exchange chamber and a secondary
evaporator heat exchange pipe which is arranged in the upper heat exchange chamber; the pipe wall of the secondary evaporator heat exchange pipe consists of an inner wall and an outer wall; evenly distributed
millimeter-level small holes are arranged on the inner wall; and evenly distributed micron-level
micro holes are arranged on the outer wall, according to the liquid
ammonia evaporator, the heat exchange efficiency of liquid
ammonia is greatly improved and an
ammonia evaporation supply
system is simplified; and the liquid ammonia
evaporation system has a compact structure and is capable of fully utilizing the
waste heat of
flue gas and the heat of preheated air.