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Tower biological filter tank

A biological filter and tower technology, applied in the field of industrial wastewater treatment devices, can solve the problems of shortening the operation period of the equipment, blockage of the packing, large thickness of the packing layer, etc., and achieve the effect of avoiding the wall flow effect.

Active Publication Date: 2020-01-17
TAIZHOU QINGRUN ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if such a redistributor is used in a tower biofilter, as mentioned earlier, due to the entrainment of the biofilm in the liquid phase, due to the liquid phase at the bottom periphery of each section of the filter material and due to the existence of the distributor The enrichment in the middle of the top of the packing section will cause partial blockage of the packing in this area, thereby greatly shortening the equipment operation cycle
In addition, due to the large thickness of the packing layer in the tower biofilter, it is difficult for the flushing water to fully scrub the surface of the packing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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. The valve surface of the float valve 21 includes a sieve hole 212 in the middle and 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; each tray 2 is provided upstream and downstream 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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Abstract

The invention relates to a tower biological filter, which adopts a plate tower structure and eliminates the wall flow problem in the traditional packing tower. The strong impact of a gas phase causesa tower plate to flood to scour the packing surface and cause an aged biofilm to fall off. The generation of the flooding prevents liquid on the corresponding tower plate from flowing into a lower tower plate. At the same time, a circumferential overflow groove is arranged on the tower wall above the tower plate for guiding the liquid carrying the biofilm out of the tower, thereby preventing the enrichment of the biofilm to the lower tower plate and the blockage of the lower tower plate caused by the enrichment; through guide float valves arranged at intervals or in different zones, guide holes are opened during the strong impact of the gas phase so as to strengthen the disturbance of the liquid layer on the plate to further accelerate the stripping of the biofilm and shorten the time of the strong impact of the gas phase; the tower biological filter film can realize uninterrupted sewage treatment operation by arranging a gas supply pipe between adjacent tower plates to realize selective flooding flushing of any tower plate while maintaining normal operation of other tower plates.

Description

technical field [0001] The invention relates to an industrial wastewater treatment device, in particular to a tower type biological filter. Background technique [0002] Industrial wastewater is mainly divided into heavy metal wastewater, organic wastewater, ammonia nitrogen wastewater, and phosphorus wastewater according to the content of pollutants. The latter three, namely organic, ammonia nitrogen, and phosphorus-containing wastewater, are usually discharged in a mixed form. This waste water is the main cause of eutrophication and black and smelly water. At present, the mainstream treatment processes for such industrial wastewater include activated sludge method and biofilm method. Among them, in the biofilm treatment process, microorganisms attach to the surface of the filter material and grow, which can form a stable ecological condition, allowing bacteria with slow proliferation and long generation time and higher micro organisms, such as nitrifying bacteria, to sur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/02C02F3/10
CPCC02F3/02C02F3/10C02F2203/006C02F2303/14Y02W10/10
Inventor 徐书敏
Owner TAIZHOU QINGRUN ENVIRONMENTAL PROTECTION TECH CO LTD
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