Concentrated ammonia rectification apparatus for treating titanium dioxide industrial wastewater

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] like figure 1 and figure 2 As shown, a kind of concentrated ammonia rectification device for treating titanium dioxide industrial wastewater according to the present invention includes a preheater 1 and a stripping deamination tower 2, and the stripping deamination tower 2 includes a tower still 3 , the tower kettle 3 is divided into a rectification section 4, a waste water feed section 5, a separation section 6 and a raffinate separation section 7 from top to bottom, and a water inlet pipe 8 is arranged on the outer side of the tower kettle 3, and The upper part of the water inlet pipe 8 is provided with three water inlets 9, and an ammonia reflux pipe 10 is additionally provided on the outer side of the tower kettle 3, and a through-flow tray 11 is provided inside the tower kettle 3, and in the through-flow type A plate-type gas separation membrane 12 is provided on the tray 11, and the through-flow tray 11 is composed of an S-shaped tray base 13, and a mass transfer hole 14 is provided on the S-shaped tray base 13. The top of still 3 is provided with ammonia gas outlet 15, is provided with waste water outlet 16 at the bottom of described tower still 3, is provided with high-temperature steam inlet 17 on the side below outside described tower still 3; Table 18 and pressure gauge 19; a first liquid level gauge 20 and a second liquid level gauge 21 are arranged outside the lower part of the tower kettle 3; an upper sight glass 22 is arranged on the top of the tower kettle 3, and 3 The lower part is provided with a lower viewing mirror 23; a preheater 1 is provided beside the tower kettle 3, and the preheater 1 is connected to the stripping deamination tower 2 through a pipeline; the plate type gas separation membrane 12 The pore size of the membrane wall is 0.1nm-0.5nm. The invention has the advantages of simple overall structure, low cost, high ammonia nitrogen conversion efficiency, and no secondary pollution to the treated wastewater.