CN2714556Y

CN2714556Y - Sewage nutrient removing device for integrated circulating fluidized bed

Info

Publication number: CN2714556Y
Application number: CNU200420012072XU
Authority: CN
Inventors: 崔玉波
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-11
Filing date: 2004-06-11
Publication date: 2005-08-03
Anticipated expiration: 2014-06-11

Abstract

The utility model relates to a sewage nutrient removing device for an integrated circulating fluidized bed, belonging to the technical field of sewage treating, in particular to a device utilizing a circulation fluidized bed to run denitrification and dephosphorization for the sewage. The sewage nutrient removing device for an integrated circulating fluidized bed comprises an oxygen deficiency fluidized bed in a lower part, an anaerobic fluidized bed in a middle part and a solid-liquid separators in a top part. The outlet of the anaerobic fluidized bed is connected with an aerobic fluidized bed whose one side is connected with an inclining plate sedimentation basin. The lower part of the inclining plate sedimentation basin is respectively used as a carrier back flow sedimentation zone and a rich phosphorus sludge sedimentation zone. The carrier back flow sedimentation zone is connected with the aerobic fluidized bed by a carrier back flow pipe. Every component is connected by a pipe line. The utility model has the advantages of novel structure, compact structure. The rich phosphorus sludge and the back flow carrier are respectively removed with reasonable arrangement of the sedimentation zone so that the sewage nutrient removing device for an integrated circulating fluidized bed can effectively remove in water pollutants of nitrogen, phosphorus, COD, ect. The sewage nutrient removing device for an integrated circulating fluidized bed can improve the efficiency of purifying the sewage.

Description

Integral type circulating fluidized bed sewage nutrient removal device

Technical field

The utility model belongs to technical field of sewage, refers in particular to utilize circulating fluidized bed to carry out the device of sewage denitrification and dephosphorization.

Background technology

Nutritive substances such as nitrogen in the sewage and phosphorus are the one of the main reasons that causes the receiving water body eutrophication.GB8979-1996 " integrated wastewater discharge standard " has made strict qualification to pollutant emission concentration such as nitrogen, phosphorus, organism, and many places and river basin have been formulated stricter total amount to the discharging of pollutent and limited.Along with the raising of expanding economy and people's Environmental awareness, will certainly more and more come into one's own to the control of nitrogen phosphorus.Traditional nutrient removal technical process is long, is mainly the suspension growth bioremediation, and the residence time reaches 8-12 hour.Also have the biological filter is designed to the aerobic/anaerobic denitrification dephosphorization apparatus, but need periodical operation, and anoxic, anaerobism, aerobic condition and spoil disposal are not easy control.Anoxic, aerobic and anaerobism equipment and chemical dephosphorization equipment are organically combined, overcome the factor that influences each other and restrict that exists in the traditional biological denitrification dephosphorization technique though form sewage denitrification and dephosphorization suite of equipment and technology, chemical agent has increased expense and investment.Biomembrane process has advantages such as efficient height, no sludge bulking than suspension growth technology, fluidized-bed has been taken into account the fixedly advantage of film and suspension growth, but the necessary mud of denitrogenation dephosphorizing reflux be always restriction fixedly membrane process be applied to the principal element of sewage nutrient removal.

Summary of the invention

The utility model provides a kind of integral type circulating fluidized bed sewage nutrient removal device, the denitrogenation dephosphorizing problem simultaneously that exists when utilizing fluidized-bed to carry out sewage disposal at present to solve.The technical scheme that the utility model is taked is: water inlet pipe 1 through valve and pump and nitrification liquid return line 3 with banish water pipe 5 with main current water distributing pipe 4 and auxiliary water respectively after anaerobic bed backflow water pipe 2 communicates and be connected, this main current water distributing pipe 4 is positioned at the bottom of anoxic fluidized-bed 13, auxiliary water is banishd the bottom that water pipe 5 is positioned at anoxic fluidized-bed 13, the top of this anoxic fluidized-bed 13 is that anaerobism is carried bed 14, it is solid-liquid separator 15 that this anaerobism is carried the top of bed 14, these solid-liquid separator 15 tops connect anaerobic bed backflow water pipe 2, gas discharge outlet 12 is arranged at the top, carry the bottom of the right-hand part of bed 14 to have anaerobism to carry bed outlet 20 in anaerobism, this anaerobism carries bed outlet 20 to be connected with aerobic fluidized bed 8, this aerobic fluidized bed bottom connects aerator 11 and aerobic bed recirculation water water distributing pipe 6 respectively, the carrier refluxing opening 19 of its bottom is connected with the bottom of anoxic fluidized-bed 13, this aerobic fluidized bed top is connected with inclined-plate clarifying basin 18, this inclined-plate clarifying basin bottom is connection carrier backflow settling region 16 and rich phosphorus sludge settling region 17 respectively, be connected with aerobic fluidized bed 8 by carrier return line 9 in this carrier backflow settling region 16, rich phosphorus sludge discharge outlet 10 is arranged at 17 bottoms, rich phosphorus sludge settling region, water outlet 21 is arranged at inclined-plate clarifying basin 18 tops, this water outlet by effluent recycling pipe 7 be connected aerobic bed recirculation water water distributing pipe 6 and auxiliary water respectively and banish water pipe 5.During work; the recirculation water that contains nitrate nitrogen enters in the anoxic fluidized-bed 13; carry out denitrification therein; denitrogenation; nitrogen is discharged from top gas discharge outlet 12; rich phosphorated carrier biofilm enters anoxic bed 13 from the bottom carrier refluxing opening in the aerobic bed; entering anaerobism then carries bed 14 to release phosphorus; in solid-liquid separator 15, carry out solid-liquid separation, enter aerobic fluidized bed in, inhale phosphorus; nitrated; carrier biofilm enters inclined-plate clarifying basin with water; carry out solid-liquid separation, carry out backflow of particles in carrier backflow settling region 16, rich phosphorated mud is discharged from the rich phosphorus sludge discharge outlet 10 of 17 bottoms, rich phosphorus sludge settling region.

Advantage of the present utility model is: novel structure, compact construction, hydraulic detention time is short, is 1/4 of traditional treatment method.The settling region reasonable Arrangement can be got rid of rich phosphorus sludge and backflow carrier respectively.High-biomass, high mass transfer.The carrier specific surface area is big, and along with carrier filler stirs in sewage, has improved contacting of microorganism and pollutants in sewage matter, thereby has improved wastewater purification efficiency.The shearing that is produced by friction and current transmission between aeration, carrier makes microbial film can keep optimum activity thickness, has improved detergent power, and can stop sludgd deposition on the carrier surface.Anoxic, anaerobic and aerobic condition are organically combined, overcome the factor that influences each other and restrict that exists in the traditional biological denitrification dephosphorization technique, nitrifier, denitrifying bacteria and dephosphorization bacterial are being played a role under the optimal conditions separately, can remove nitrogen and pollutents such as phosphorus and COD in the sewage efficiently.By regulating auxiliary flow, can freely adjust the quantity of reflux of carrier biofilm, with the suction phosphorus of finishing dephosphorization bacterial with release phosphorus.

Description of drawings

Accompanying drawing is the utility model structural representation.

Embodiment

Water inlet pipe 1 through valve and pump and nitrification liquid return line 3 with banish water pipe 5 with main current water distributing pipe 4 and auxiliary water respectively after anaerobic bed backflow water pipe 2 communicates and be connected, this main current water distributing pipe 4 is positioned at the bottom of anoxic fluidized-bed 13, auxiliary water is banishd the bottom that water pipe 5 is positioned at anoxic fluidized-bed 13, the top of this anoxic fluidized-bed 13 is that anaerobism is carried bed 14, it is solid-liquid separator 15 that this anaerobism is carried the top of bed 14, these solid-liquid separator 15 tops connect anaerobic bed backflow water pipe 2, gas discharge outlet 12 is arranged at the top, carry the bottom of the right-hand part of bed 14 to have anaerobism to carry bed outlet 20 in anaerobism, this anaerobism carries bed outlet 20 to be connected with aerobic fluidized bed 8, this aerobic fluidized bed bottom connects aerator 11 and aerobic bed recirculation water water distributing pipe 6 respectively, the carrier refluxing opening 19 of its bottom is connected with the bottom of anoxic fluidized-bed 13, this aerobic fluidized bed top is connected with inclined-plate clarifying basin 18, this inclined-plate clarifying basin bottom is connection carrier backflow settling region 16 and rich phosphorus sludge settling region 17 respectively, be connected with aerobic fluidized bed 8 by carrier return line 9 in this carrier backflow settling region 16, rich phosphorus sludge discharge outlet 10 is arranged at 17 bottoms, rich phosphorus sludge settling region, water outlet 21 is arranged at inclined-plate clarifying basin 18 tops, this water outlet by effluent recycling pipe 7 be connected aerobic bed recirculation water water distributing pipe 6 and auxiliary water respectively and banish water pipe 5.

Claims

1, integral type circulating fluidized bed sewage nutrient removal device, it is characterized in that: water inlet pipe＜1〉through valve and pump and nitrification liquid return line＜3 with anaerobic bed backflow water pipe＜2 communicate after respectively with main current water distributing pipe＜4 banish water pipe＜5 with auxiliary water be connected, these main current water distributing pipe＜4〉be positioned at anoxic fluidized-bed＜13 the bottom, auxiliary water is banishd water pipe＜5〉be positioned at anoxic fluidized-bed＜13 the bottom, these anoxic fluidized-bed＜13〉top be that anaerobism is carried bed＜14, this anaerobism is carried bed＜14〉top be solid-liquid separator＜15, this solid-liquid separator＜15〉top connection anaerobic bed backflow water pipe＜2 〉, gas discharge outlet＜12 are arranged at the top 〉, carry bed＜14 in anaerobism〉the bottom of right-hand part have anaerobism to carry bed outlet＜20, this anaerobism is carried bed outlet＜20〉with aerobic fluidized bed＜8 be connected, this aerobic fluidized bed bottom connects aerator＜11 respectively〉and aerobic bed recirculation water water distributing pipe＜6, its the bottom carrier refluxing opening＜19 with anoxic fluidized-bed＜13 the bottom be connected, this aerobic fluidized bed top and inclined-plate clarifying basin＜18〉be connected, this inclined-plate clarifying basin bottom is connection carrier backflow settling region＜16 respectively〉and rich phosphorus sludge settling region＜17, in these carrier backflow settling region＜16〉by carrier return line＜9 with aerobic fluidized bed＜8 be connected, there are rich phosphorus sludge discharge outlet＜10 richness phosphorus sludge settling region＜17〉bottom 〉, inclined-plate clarifying basin＜18〉water outlet＜21 are arranged at top, this water outlet is by effluent recycling pipe＜7〉be connected aerobic bed recirculation water water distributing pipe＜6 respectively and auxiliary water banish water pipe＜5.