A tower biofilter
A biological filter and tower technology, applied in the field of industrial wastewater treatment equipment, can solve the problems of shortening the equipment operation cycle, packing blockage, thick packing layer, etc., and achieve the effect of avoiding wall flow effect
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Embodiment 1
[0025]A tower type biofilter, comprising a tower body 1, and a sewage inlet 5 and an air outlet 8 arranged at the top of the tower body 1, the bottom of the tower body 1 is also provided with a water outlet 7 and an air inlet 6, the tower The interior of the body 1 is provided with several layers of trays 2, the trays 2 are sieve trays, and the upstream and downstream of each tray 2 are respectively equipped with a liquid receiving tray 4 and a downcomer 3; the downcomer The pipe 3 is formed by the overflow weir 31 located on the upper surface of the tray 2, the downcomer wall 32 located on the lower surface of the tray 2 and the inner wall of the tower body 1; the tray 2 is provided with packing Layer 22; the height of the packing layer 22 does not exceed the overflow weir 31; the packing layer 22 includes a limiting element 221, and the limiting element 221 is surrounded by the tray 2 and the overflow weir 31 for placing packing Filling bin; the limiting element 221 allows w...
Embodiment 2
[0028] The difference from Example 1 is that the tray 2 is a valve tray, and several float valves 21 are arranged on the valve tray, and the valve surface of the float valve 21 includes a screen hole 212 in the middle and a The valve edge 211 on the edge of the valve surface; the float valve 21 also includes two opposite valve legs 213 and a valve foot 216 at the bottom of the valve legs 213, and the valve foot 216 is allowed to be bent during installation; The corresponding sides of the two valve legs 213 are connected by a grid plate 215, and several grid holes 214 are arranged on the grid plate 215; The widths are all smaller than the smallest dimension of the granular filler.
Embodiment 3
[0030] The difference from any of the above-mentioned embodiments is that an air supply pipe 11 is provided between adjacent two trays 2, and the air supply pipe 11 is connected to a high-pressure gas source through an electronically controlled valve; the upstream and downstream of each tray 2 are provided with The air pressure sensor is used to monitor the air pressure everywhere in the tower and the plate pressure drop of each tray. Both the electric control valve and the air pressure sensor are electrically connected to the microprocessor to adjust the air supply according to the plate pressure drop signal of each tray location and volume.
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