The invention relates to a no-heat-exchange energy saving preparation device and method for preparing
ammonia water from
liquid ammonia directly. The preparation device comprises a cylindrical reaction tank, a water inlet is arranged at the bottom of the reaction tank, a diluted
ammonia water outlet is arranged at the top of the reaction tank, a plurality of
liquid ammonia inlets are arranged in the upper and middle part of the reaction tank, each
liquid ammonia inlet is connected with a respective coil
pipe. The coil pipes are installed in a staggered manner, and extend towards the middle and lower part of the reaction tank. Each coil
pipe is connected with a respective
distributor. The coil pipes are heated by
heat energy generated by diluted
ammonia water during the
dilution reaction process, thus liquid ammonia in the coil
pipe expands and absorb heat, thus heat generated during the liquid ammonia
dilution reaction is reduced, liquid ammonia expands before
dilution, and the liquid ammonia dilution speed is raised. The device takes full
advantage of
waste heat generated during liquid ammonia dilution, the liquid ammonia dilution efficiency is raised, the situation that energy is employed to lower the temperature of the diluted ammonia water is avoided,
energy consumption is lowered and a lot of energy is saved.