CN114477450A - Enhanced domestic sewage nitrogen and phosphorus removal treatment device and treatment method - Google Patents
Enhanced domestic sewage nitrogen and phosphorus removal treatment device and treatment method Download PDFInfo
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- 239000010865 sewage Substances 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 41
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims description 54
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims description 38
- 229910052698 phosphorus Inorganic materials 0.000 title claims description 38
- 239000011574 phosphorus Substances 0.000 title claims description 38
- 229910052757 nitrogen Inorganic materials 0.000 title claims description 27
- 238000005842 biochemical reaction Methods 0.000 claims abstract description 206
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 64
- 239000010802 sludge Substances 0.000 claims description 53
- 238000005192 partition Methods 0.000 claims description 49
- 238000006243 chemical reaction Methods 0.000 claims description 36
- 238000005276 aerator Methods 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 230000001079 digestive effect Effects 0.000 claims description 10
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 9
- 238000006396 nitration reaction Methods 0.000 claims description 5
- 238000004062 sedimentation Methods 0.000 claims description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 238000005265 energy consumption Methods 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001706 oxygenating effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
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- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses a reinforced domestic sewage denitrification and dephosphorization treatment device and a treatment method, which comprises a primary biochemical reaction chamber and a secondary biochemical reaction chamber, wherein the primary biochemical reaction chamber is arranged in the secondary biochemical reaction chamber and is coaxially arranged, the bottom of the primary biochemical reaction chamber is fixedly connected with the bottom of the inner wall of the secondary biochemical reaction chamber, the inner wall of the primary biochemical reaction chamber is fixedly connected with an inner chamber conical plate, and the bottom of the inner chamber conical plate is fixedly connected with the bottom of the inner wall of the secondary biochemical reaction chamber. The impact resistance is stronger, and the adaptability is stronger.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a reinforced domestic sewage denitrification and dephosphorization treatment device and a treatment method.
Background
At present, according to different process treatment flows of domestic sewage, the main operation methods comprise: oxidation ditch method, A/O method, A2The A2O is widely applied to the sewage treatment in China at present, the process is characterized in that an anoxic tank is additionally arranged on the basis of an AO anaerobic-aerobic process to form modes of anaerobic phosphorus release, anoxic denitrification and aerobic phosphorus absorption so as to realize synchronous nitrogen and phosphorus removal, and the process is one of the most widely used nitrogen and phosphorus removal processes in China at present, and A2 is a novel process for removing nitrogen and phosphorus in the prior art2the/O process is taken as a main process for nitrogen and phosphorus removal treatment of wastewater, and plays a great role in the field of urban sewage treatment in China in recent years. But with an increase in the pollutant emission standards, in A2The sewage treatment plant adopting the process/O as the main body faces the problem that indexes such as SS, TP and the like of effluent can not meet the first-class A standard in the pollutant discharge standard of urban sewage treatment plants (GB 18918-2002), and needs to be upgraded and modified urgently. At present against A in China2The main method for upgrading and modifying the sewage treatment plant with the O as the main process is to carry out A2And a coagulation-precipitation-filtration unit and other units are added after the/O process, SS is further removed through precipitation filtration, and the dephosphorization efficiency of the system is further improved through chemical dephosphorization.
However, most of the traditional sewage treatment consumes a large amount of carbon sources at the anaerobic end, so that the carbon sources at the anoxic end are insufficient, and organic carbon sources need to be supplemented in the denitrification process for growth and reproduction of denitrifying bacteria, so that the energy conservation and the medicament adding cost saving are not facilitated; each biochemical reaction is short and strictly partitioned, so that a digestive juice reflux system is arranged, and the energy consumption is increased; the content of nitrate in the return sludge of the aerobic section is too high, the effect of limiting the phosphorus-accumulating bacteria to fully release phosphorus is achieved, the phosphorus absorption efficiency of the aerobic section is seriously influenced, the phosphorus removal effect of the system is further influenced, the sludge phosphorus of the system is limited by various microorganisms, the optimal growth conditions of all microorganisms cannot be met, and the nitrogen and phosphorus removal effect of the system is difficult to further improve.
Disclosure of Invention
The invention aims to provide a reinforced domestic sewage denitrification and dephosphorization treatment device and a treatment method, which aim to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
a reinforced domestic sewage denitrification and dephosphorization treatment device and a treatment method (sewage gradient advanced treatment device and treatment method) comprise a primary biochemical reaction chamber and a secondary biochemical reaction chamber, wherein the primary biochemical reaction chamber is arranged in the secondary biochemical reaction chamber and is coaxially arranged, the bottom of the primary biochemical reaction chamber is fixedly connected with the bottom of the inner wall of the secondary biochemical reaction chamber, the inner wall of the primary biochemical reaction chamber is fixedly connected with an inner chamber conical plate, the bottom of the inner chamber conical plate is fixedly connected with the bottom of the inner wall of the secondary biochemical reaction chamber, a circle of outer chamber partition plate is arranged between the primary biochemical reaction chamber and the secondary biochemical reaction chamber, an annular sludge collection chamber is arranged between the bottom of the outer chamber partition plate and the bottom of the inner wall of the secondary biochemical reaction chamber, the bottom of the annular sludge collection chamber is fixedly connected with the bottom of the inner wall of the secondary biochemical reaction chamber, and the top of the outer wall of the annular sludge collection chamber is fixedly connected with the bottom of the outer chamber partition plate, the bottom of one side of the second-stage biochemical reaction bin is provided with a first-stage sewage inlet header pipe, a circle of outer bin conical plate is fixedly connected between the bottom of the side wall of the outer bin partition plate and the inner wall of the second-stage biochemical reaction bin, one end of the first-stage sewage inlet header pipe sequentially penetrates through the side wall of the second-stage biochemical reaction bin, the outer bin conical plate, the annular sludge collecting bin, the side wall of the first-stage biochemical reaction bin and the side wall of the inner bin conical plate, the outer wall of the first-stage sewage inlet header pipe is fixedly connected with the side wall of the second-stage biochemical reaction bin, the outer bin conical plate, the annular sludge collecting bin, the side wall of the first-stage biochemical reaction bin and the side wall of the inner bin conical plate in a sealing manner, a first-stage biochemical reaction mud discharging pipe is arranged at the bottom of the other side of the second-stage biochemical reaction bin, one end of the first-stage biochemical reaction mud discharging pipe sequentially penetrates through the side wall of the second-stage biochemical reaction bin, the outer bin conical plate, the annular sludge collecting bin, the side wall of the first-stage biochemical reaction bin and the side wall of the inner bin conical plate, and the outer wall of the first-stage biochemical reaction mud discharge pipe is fixedly connected with the side wall of the second-stage biochemical reaction bin, the outer bin conical plate, the annular mud collection bin, the side wall of the first-stage biochemical reaction bin and the side wall of the inner bin conical plate in a sealing manner, the outer wall of the first-stage sewage inlet header pipe at one end of the second-stage biochemical reaction bin is fixedly connected with a second-stage sewage inlet pipe, the second-stage sewage inlet pipe is provided with a second-stage sewage inlet regulating valve, the second-stage sewage inlet pipe is communicated with the first-stage sewage inlet header pipe, the other end of the second-stage sewage inlet pipe sequentially penetrates through the side wall of the second-stage biochemical reaction bin and the outer bin partition plate and is fixedly connected with the side wall of the second-stage biochemical reaction bin and the outer bin partition plate in a sealing manner, the bottom of the side wall of the second-stage biochemical reaction bin is provided with a second-stage biological reaction bin mud discharge pipe between the first-stage sewage inlet header pipe and the first-stage biochemical reaction mud discharge pipe in a circumferential manner, and the second-stage biological reaction bin mud discharge pipe sequentially penetrates through the side wall of the second-stage biochemical reaction bin, Outer storehouse conical plate and annular collection mud storehouse lateral wall to annular collection mud storehouse in, and second grade biological reaction storehouse mud pipe and second grade biochemical reaction storehouse lateral wall, annular collection mud storehouse lateral wall and the sealed fixed connection of outer storehouse baffle, outer storehouse baffle lateral wall is in one-level biochemical reaction mud pipe and second grade biological reaction storehouse mud pipe below according to the even outer storehouse baffle bottom mud hole of having seted up of circumference, between one-level biochemical reaction storehouse outer wall and outer storehouse baffle inner wall at one-level biochemical reaction mud pipe and second grade biological reaction storehouse mud pipe top fixed connection round trompil conical plate, a plurality of outer storehouse baffle rectangular holes have been seted up according to the circumference is even in the trompil conical plate top to outer storehouse baffle lateral wall, a plurality of rectangle overflow holes have been seted up according to the even running through of circumference in one-level biochemical reaction storehouse lateral wall top.
As a further scheme of the invention: the delivery port department fixedly connected with outlet header pipe of second grade biochemical reaction storehouse lateral wall, be provided with round triangle weir water catch bowl between second grade biochemical reaction storehouse inner wall and the outer storehouse baffle outer wall, triangle weir water catch bowl and second grade biochemical reaction storehouse inner wall fixed connection, and the inner wall top that triangle weir water catch bowl and second grade biochemical reaction storehouse are adjacent flushes with outlet header pipe inner wall bottom.
As a still further scheme of the invention: one end of the first-level sewage inlet main pipe in the inner bin conical plate is fixedly provided with an umbrella type water blocking plate, and a plurality of water jetting holes are formed in the umbrella type water blocking plate above the first-level sewage inlet main pipe.
As a still further scheme of the invention: the diameter of the water jetting holes is 30mm, and the sum of the areas of the water jetting holes is not more than one fifth of the area of the primary sewage inlet main pipe.
As a still further scheme of the invention: the outer wall of the primary biochemical reaction bin is fixedly connected with a circle of conical guide plate below the rectangular overflow hole.
As a still further scheme of the invention: the inner wall of the outer bin partition board is fixedly connected with a circle of second-stage sewage perforation water distribution tank, one side of the second-stage sewage perforation water distribution tank, which is close to the side wall of the first-stage biochemical reaction bin, is uniformly provided with a plurality of second-stage sewage perforations according to the circumference, and the second-stage sewage perforation water distribution tank is communicated with a second-stage sewage inlet pipe.
As a still further scheme of the invention: the top coaxial common fixed connection mounting bracket of one-level biochemical reaction storehouse lateral wall, outer storehouse baffle and second grade biochemical reaction storehouse lateral wall, mounting bracket top center fixed mounting has voltage-sharing air distributor, voltage-sharing air distributor has a plurality of air ducts according to the even UNICOM of circumference, air duct screw thread UNICOM has the one-level air pipe, the one-level air pipe bottom is at one-level biochemical reaction storehouse internal fixation intercommunication has one-level tubular aerator, the air duct bottom has the second grade air pipe in the one-level air pipe outside screw thread UNICOM, the second grade air pipe is in between outer storehouse baffle and the triangle weir water catch bowl, the fixed intercommunication of second grade air pipe bottom between outer storehouse baffle and second grade biochemical reaction storehouse has second grade tubular aerator, the air duct is provided with second grade air volume regulating valve between one-level air pipe and second grade air pipe.
A reinforced domestic sewage denitrification and dephosphorization treatment method comprises the following steps:
the method comprises the following steps: domestic sewage enters the primary biochemical reaction bin through the primary sewage inlet header pipe, enters the secondary sewage perforation water distribution tank water distribution holes through the secondary sewage inlet pipe, and enters the anoxic end in the outer bin partition plate in the secondary biochemical reaction bin;
step two: pressurized air generated by the operation of the fan enters the pressure equalizing air distributor, the primary air pipe and the secondary air pipe, the primary tubular aerator and the secondary tubular aerator oxygenate the primary biochemical reaction bin and the secondary biochemical reaction bin, and the dissolved oxygen concentration of the anoxic zone and the aerobic zone is controlled by the secondary air volume regulating valve;
step three: preliminary phosphorus removal is carried out in an anaerobic zone in the first-stage biochemical reaction chamber, deep phosphorus removal is carried out in a local anaerobic zone in an outer chamber partition plate in the first-stage biochemical reaction chamber and the second-stage biochemical reaction chamber, short-range nitration reaction and denitrification reaction are carried out in the first-stage biochemical reaction chamber, a part of nitrogen is removed, and upper-layer digestive juice uniformly enters the outer chamber partition plate of the second-stage biochemical reaction chamber through a rectangular overflow hole and a conical guide plate to carry out deep nitrogen removal;
step four: the sludge in the first-stage biochemical reaction bin falls into the conical plate of the inner bin and then slides down to the bottom, and then enters the sludge tank through the first-stage biological reaction sludge discharge pipe, the sludge in the second-stage biochemical reaction bin enters the annular sludge collection bin through the sludge discharge hole and the perforated conical plate at the bottom of the partition plate of the outer bin, and then enters the sludge tank through the sludge discharge pipe of the second-stage biological reaction bin;
step five: the sewage treated by the biochemical reaction for two times is immersed in the water collecting tank of the triangular weir and is discharged into the secondary sedimentation tank by the main water outlet pipe.
As a still further scheme of the invention: in the first step, the inflow rate of the secondary sewage is controlled by a secondary sewage inflow regulating valve, and the inflow rate control range of the secondary sewage is between 10 and 25 percent of the total amount of sewage inflow.
As a still further scheme of the invention: in the second step, the dissolved oxygen concentration of the anoxic zone and the aerobic zone is controlled by a secondary air volume regulating valve, so that the oxygen concentration of the anoxic zone is ensured to be 0.2-0.5mg/L and strictly lower than 0.2, and the dissolved oxygen concentration of the aerobic zone is controlled to be 1.2-1.8 mg/L.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the strictless partition design, cancels the traditional sewage strict partition treatment mode, adopts the strictless partition design, has three reactions of anaerobic reaction, anoxic reaction and aerobic reaction in the primary biochemical reaction zone, continuously changes the oxygen concentration in the whole reaction bin, has more types of biochemical bacteria, has fierce competition of the biochemical bacteria, stronger bacterial activity and better biochemical reaction strength, and can control the sizes of the three zones through aeration quantity, thereby having stronger impact resistance and stronger adaptability.
2. The invention adopts gradient treatment, the digestive juice directly enters a secondary biochemical reaction chamber for nitration reaction, a digestive juice reflux pump is cancelled, a large amount of energy consumption is saved, meanwhile, the original sewage is adopted as carbon source supplement in the secondary stage, the adding use of an outsourcing carbon source is reduced, the energy and the medicament are saved, the operation cost is saved, the dissolved phosphorus in the sewage is converted into sludge to form insoluble particles by utilizing the functions of aerobic phosphorus absorption and anaerobic phosphorus release of the sludge, and finally, the phosphorus removal purpose is achieved by discharging the phosphorus-containing sludge, thereby being beneficial to improving the quality of the environment for microbial growth.
3. In the invention, the nitrogen and phosphorus removal adopts two-stage gradient treatment, the indexes of the total nitrogen and total phosphorus in the effluent meet the first-level index A in the urban sewage discharge standard, the ammonia removal rate is over 95.0 percent, and simultaneously, the energy consumption index is over 30 percent lower than that of the traditional method, thereby being beneficial to the deep treatment and popularization of domestic sewage.
Drawings
FIG. 1 is a schematic structural diagram of a reinforced domestic sewage denitrification and dephosphorization treatment device and a treatment method.
FIG. 2 is a first sectional view of a reinforced domestic sewage denitrification and dephosphorization treatment apparatus and treatment method.
FIG. 3 is a second sectional view of a reinforced domestic sewage denitrification and dephosphorization treatment apparatus and treatment method.
FIG. 4 is a top view of a reinforced domestic sewage denitrification and dephosphorization treatment apparatus and treatment method.
Fig. 5 is a partially enlarged view of a portion a in fig. 2.
Fig. 6 is a partially enlarged view of fig. 3 at B.
FIG. 7 is a sectional view of a reinforced domestic sewage denitrification and dephosphorization treatment device and treatment method.
FIG. 8 is a flow chart of a reinforced domestic sewage denitrification and dephosphorization treatment device and a treatment method.
In the figure: 1. a primary sewage inlet main pipe; 2. a second-stage sewage inlet pipe; 3. a secondary sewage inlet regulating valve; 4. an umbrella-type water-blocking plate; 5. a water jet hole; 6. a secondary sewage perforation water distribution tank; 7. an inner bin conical plate; 8. a first-stage biochemical reaction sludge discharge pipe; 9. a rectangular overflow aperture; 10. a conical deflector; 11. an outer bin partition; 12. rectangular holes of the outer bin partition plate; 13. a mud discharging hole is arranged at the bottom of the outer bin partition plate; 14. a perforated conical plate; 15. an annular sludge collecting bin; 16. a secondary biological reaction bin sludge discharge pipe; 17. an outer bin tapered plate; 18. a water collecting tank of the triangular weir; 19. a water outlet main pipe; 20. a pressure equalizing air distributor; 21. a primary air pipe; 22. a secondary air volume adjusting valve; 23. a secondary air pipe; 24. a two-stage tubular aerator; 25. a primary pipe type aerator; 26. a first-stage biochemical reaction bin; 27. a secondary biochemical reaction chamber; 28. an air duct; 29. and (7) mounting frames.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 8, in the embodiment of the present invention, an enhanced domestic sewage nitrogen and phosphorus removal treatment apparatus and treatment method (sewage gradient advanced treatment apparatus and treatment method) includes a primary biochemical reaction chamber 26 and a secondary biochemical reaction chamber 27, wherein the primary biochemical reaction chamber 26 is disposed in the secondary biochemical reaction chamber 27 and coaxially disposed, the bottom of the primary biochemical reaction chamber 26 is fixedly connected to the bottom of the inner wall of the secondary biochemical reaction chamber 27, the inner wall of the primary biochemical reaction chamber 26 is fixedly connected to an inner chamber conical plate 7, the bottom of the inner chamber conical plate 7 is fixedly connected to the bottom of the inner wall of the secondary biochemical reaction chamber 27, a ring of outer chamber partition plate 11 is disposed between the primary biochemical reaction chamber 26 and the secondary biochemical reaction chamber 27, an annular sludge collection chamber 15 is disposed between the bottom of the outer chamber partition plate 11 and the bottom of the inner wall of the secondary biochemical reaction chamber 27, and the bottom of the inner wall of the secondary biochemical reaction chamber 27 is fixedly connected to the annular sludge collection chamber 15, the top of the outer wall of the annular sludge collection bin 15 is fixedly connected with the bottom of the outer bin partition plate 11, the bottom of one side of the second-stage biochemical reaction bin 27 is provided with a first-stage sewage inlet header pipe 1, a circle of outer bin conical plate 17 is fixedly connected between the bottom of the side wall of the outer bin partition plate 11 and the inner wall of the second-stage biochemical reaction bin 27, one end of the first-stage sewage inlet header pipe 1 sequentially penetrates through the side wall of the second-stage biochemical reaction bin 27, the outer bin conical plate 17, the annular sludge collection bin 15, the side wall of the first-stage biochemical reaction bin 26 and the side wall of the inner bin conical plate 7 in a sealing and fixed connection manner, the bottom of the other side of the second-stage biochemical reaction bin 27 is provided with a first-stage biochemical reaction sludge discharge pipe 8, and one end of the first-stage biochemical reaction sludge discharge pipe 8 sequentially penetrates through the side wall of the second-stage biochemical reaction bin 27, Outer storehouse conical plate 17, annular collection mud storehouse 15, 26 lateral walls in one-level biochemical reaction storehouse and 7 lateral walls in the storehouse conical plate, and 8 outer walls in one-level biochemical reaction mud pipe and the 27 lateral walls in second grade biochemical reaction storehouse, outer storehouse conical plate 17, annular collection mud storehouse 15, 26 lateral walls in one-level biochemical reaction storehouse and the 7 lateral walls sealed fixed connection in storehouse conical plate, the outer wall fixedly connected with second grade sewage inlet tube 2 of one-level sewage inlet manifold 1 in second grade biochemical reaction storehouse 27 one end, be provided with second grade sewage inlet governing valve 3 on the second grade sewage inlet tube 2, second grade sewage inlet tube 2 is linked together with one-level sewage inlet manifold 1, the second grade sewage inlet tube 2 other end runs through 27 lateral walls in second grade biochemical reaction storehouse and outer storehouse baffle 11 in proper order, and the fixed connection sealed with second grade biochemical reaction storehouse 27 lateral walls and outer storehouse baffle 11, second grade biochemical reaction storehouse 27 lateral walls bottom is provided with the second grade biological reaction storehouse according to the circumference between one-level sewage inlet manifold 1 and biochemical reaction mud pipe 8 and arranges the row A mud pipe 16, a second biological reaction chamber mud discharging pipe 16 sequentially penetrates through the side wall of a second biochemical reaction chamber 27, the outer chamber conical plate 17 and the side wall of an annular mud collecting chamber 15 to the annular mud collecting chamber 15, the second biological reaction chamber mud discharging pipe 16 is fixedly connected with the side wall of the second biological reaction chamber 27, the side wall of the annular mud collecting chamber 15 and an outer chamber partition plate 11 in a sealing way, the side wall of the outer chamber partition plate 11 is fixedly connected with a circle of perforated conical plate 14 above the first biological reaction chamber mud discharging pipe 8 and the second biological reaction chamber mud discharging pipe 16 according to the circumference, a plurality of outer chamber partition plate rectangular holes 12 are circumferentially uniformly arranged on the side wall of the outer chamber partition plate 11 above the perforated conical plate 14 between the outer wall of the first biological reaction chamber 26 and the inner wall of the outer chamber partition plate 11, a plurality of rectangular overflow holes 9 are circumferentially uniformly arranged above the side wall of the first biological reaction chamber 26, a circle of conical guide plate 10 is fixedly connected to the outer wall of the primary biochemical reaction chamber 26 below the rectangular overflow hole 9.
The outlet of the side wall of the second-stage biochemical reaction chamber 27 is fixedly connected with a main outlet pipe 19, a circle of triangular weir water collecting groove 18 is arranged between the inner wall of the second-stage biochemical reaction chamber 27 and the outer wall of the outer chamber partition plate 11, the triangular weir water collecting groove 18 is fixedly connected with the inner wall of the second-stage biochemical reaction chamber 27, and the top of the inner wall of the triangular weir water collecting groove 18 adjacent to the second-stage biochemical reaction chamber 27 is flush with the bottom of the inner wall of the main outlet pipe 19.
One end fixed mounting of one-level sewage inlet manifold 1 in interior storehouse toper board 7 has umbrella formula water-blocking plate 4, umbrella formula water-blocking plate 4 has seted up a plurality of water injection holes 5 in one-level sewage inlet manifold 1 top, water injection hole 5 diameter is 30mm, the area sum in water injection hole 5 is not more than one fifth of one-level sewage inlet manifold 1 area, one-level sewage inlet manifold 1 sewage gets into in one-level biochemical reaction storehouse 26, it changes most fluid direction to hinder water plate 4 through the umbrella formula, control water body rising speed, prevent destroying biochemical reaction zone, umbrella formula water-blocking plate 4 is the water injection hole 5 of seting up in one-level sewage inlet manifold 1 top simultaneously, prevent that central point from forming the blind spot in one-level biochemical reaction storehouse, destroy biochemical reaction.
11 inner wall fixedly connected with round second grade sewage perforation water distribution tank 6 of outer storehouse baffle, the one side that second grade sewage perforation water distribution tank 6 is close to 26 lateral walls in one-level biochemical reaction storehouse is provided with a plurality of second grade sewage perforation according to the circumference is even, and second grade sewage perforation water distribution tank 6 is linked together with second grade sewage inlet tube 2.
A common fixed connection mounting rack 29 which is coaxial with the top of the side wall of the first-stage biochemical reaction bin 26, the side wall of the outer bin partition plate 11 and the side wall of the second-stage biochemical reaction bin 27, a pressure-equalizing air distributor 20 is fixedly mounted at the center of the top of the mounting rack 29, the pressure-equalizing air distributor 20 is communicated with a plurality of air guide pipes 28 uniformly according to the circumference, the air guide pipes 28 are communicated with a first-stage air pipe 21 in a threaded manner, the bottom end of the first-stage air pipe 21 is fixedly communicated with a first-stage tubular aerator 25 in the first-stage biochemical reaction bin 26, the bottom of the air guide pipes 28 is communicated with a second-stage air pipe 23 in a threaded manner outside the first-stage air pipe 21, the second-stage air pipe 23 is positioned between the outer bin partition plate 11 and the triangular weir water collecting tank 18, the bottom end of the second-stage air pipe 23 is fixedly communicated with a second-stage tubular aerator 24 between the outer bin partition plate 11 and the second-stage biochemical reaction bin 27, and the air guide pipes 28 are provided with a second-stage air volume adjusting valve 22 between the first-stage air pipe 21 and the second-stage air pipe 23, the air duct 28 threaded connection on one-level air pipe 21 and second air pipe 23 and the voltage-sharing air distributor 20, the convenient dismantlement installation to the convenience is overhauld the second tubular aerator 24 of connecting the one-level tubular aerator 25 in one-level air pipe 21 bottom and second air pipe 23 bottom and is maintained.
A reinforced domestic sewage denitrification and dephosphorization treatment method comprises the following steps:
the method comprises the following steps: domestic sewage enters the primary biochemical reaction bin 26 through the primary sewage inlet header pipe 1, enters the secondary sewage perforation water distribution tank 6 through the secondary sewage inlet pipe 2, enters the anoxic end in the outer bin partition plate 11 in the secondary biochemical reaction bin 27 through water distribution holes;
step two: pressurized air generated by the operation of the fan enters the pressure equalizing air distributor 20, the primary air pipe 21, the secondary air pipe 23, the primary tubular aerator 25 and the secondary tubular aerator 24 oxygenate a primary biochemical reaction chamber 26 and a secondary biochemical reaction chamber 27, and the dissolved oxygen concentration of an anoxic zone and an aerobic zone is controlled by the secondary air quantity regulating valve 22;
step three: preliminary phosphorus removal is carried out in an anaerobic zone in the first-stage biochemical reaction chamber 26, deep phosphorus removal is carried out in a local anaerobic zone in an outer chamber partition plate 11 in the first-stage biochemical reaction chamber 26 and the second-stage biochemical reaction chamber 27, short-range nitration reaction and denitrification reaction are carried out in the first-stage biochemical reaction chamber 26, a part of nitrogen is removed, and upper-layer digestive juice uniformly enters the outer chamber partition plate 11 of the second-stage biochemical reaction chamber 27 through a rectangular overflow hole 9 and a conical guide plate 10 to carry out deep nitrogen removal;
step four: the sludge in the first-stage biochemical reaction bin 26 falls into the inner bin conical plate 7, slides down into the bottom, enters a sludge tank through the first-stage biological reaction sludge discharge pipe 8, the sludge in the second-stage biochemical reaction bin 27 enters the annular sludge collection bin 15 through the sludge discharge hole 13 at the bottom of the outer bin partition plate and the perforated conical plate 14, and enters the sludge tank through the sludge discharge pipe 16 of the second-stage biological reaction bin;
step five: the sewage treated by the biochemical reaction for two times is immersed in the triangular weir water collecting tank 18 and is discharged into the secondary sedimentation tank by the water outlet header pipe 19.
In the first step, the inflow rate of the second-stage sewage is controlled by the second-stage sewage inflow regulating valve 3, and the inflow rate control range of the second-stage sewage is between 10% and 25% of the total amount of the sewage.
In the second step, the dissolved oxygen concentration of the anoxic zone and the aerobic zone is controlled by the secondary air volume adjusting valve 22, so that the oxygen concentration of the anoxic zone is ensured to be 0.2-0.5mg/L, strictly lower than 0.2, and the dissolved oxygen concentration of the aerobic zone is controlled to be 1.2-1.8 mg/L.
The working principle of the invention is as follows:
when in use, domestic sewage enters the first-stage biochemical reaction chamber 26 through the first-stage sewage inlet header pipe 1 by an external sewage pump, enters the second-stage sewage perforation water distribution tank 6 by the second-stage sewage inlet pipe 2, enters the anoxic end in the outer chamber partition plate 11 in the second-stage biochemical reaction chamber 27 through the water distribution holes, controls the water inlet flow of the second-stage sewage by the second-stage sewage inlet regulating valve 3, controls the water inlet flow of the second-stage sewage within the range of 10-25% of the total water inlet amount of the sewage, and pressurized air generated by the operation of a fan enters the pressure equalizing air distributor 20, and is used for oxygenating the first-stage biochemical reaction chamber 26 and the second-stage biochemical reaction chamber 27 by the first-stage air pipe 21 and the second-stage air pipe 23, the first-stage tubular aerator 25 and the second-stage tubular aerator 24, controls the dissolved oxygen concentration of the anoxic zone and the aerobic zone by the second-stage air volume regulating valve 22, and ensures that the oxygen concentration of the anoxic zone is 0.2-0.5mg/L, strictly lower than 0.2, the concentration of dissolved oxygen in an aerobic zone is controlled to be 1.2-1.8mg/L, preliminary phosphorus removal is carried out in an anaerobic zone in a first-stage biochemical reaction chamber 26, deep phosphorus removal is carried out in a local anaerobic zone in an outer chamber partition plate 11 in the first-stage biochemical reaction chamber 26 and a second-stage biochemical reaction chamber 27, short-range nitration reaction and denitrification reaction are carried out in the first-stage biochemical reaction chamber 26, a part of nitrogen is removed, upper-layer digestive juice uniformly enters an outer chamber partition plate 11 of the second-stage biochemical reaction chamber 27 through a rectangular overflow hole 9 through a conical guide plate 10 for deep nitrogen removal, the digestive juice enters the second-stage biochemical reaction chamber 27 through self-flow, a digestive juice reflux pump is avoided, the design amount of the digestive juice reflux pump is about 3 times of the sewage treatment amount, the energy consumption is large, meanwhile, a carbon source is needed by the denitrification reaction, a large amount of the carbon source is consumed by the first-stage biochemical reaction, and the device does not need to supplement an additional carbon source, make full use of the carbon source in the sewage, accomplish the degree of depth denitrification reaction in second grade biochemical reaction storehouse 27, not only practice thrift the medicament finished product, and practice thrift a large amount of energy consumptions, mud in the one-level biochemical reaction storehouse 26 falls into the bottom of sliding down on interior storehouse conical plate 7, get into in the sludge impoundment through one-level biochemical reaction mud pipe 8, mud passes through outer storehouse baffle bottom mud discharge hole 13 in the outer storehouse baffle 11 in the second grade biochemical reaction storehouse 27, trompil conical plate 14 gets into annular collection mud storehouse 15, get into in the sludge impoundment through second grade biochemical reaction storehouse mud pipe 16, through twice biochemical reaction treated sewage, triangle weir water catch bowl 18 is crossed in the submergence, discharge into two heavy ponds by water header pipe 19.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a strenghthened type domestic sewage nitrogen and phosphorus removal processing apparatus, includes one-level biochemical reaction storehouse (26) and second grade biochemical reaction storehouse (27), its characterized in that: the device is characterized in that the first-stage biochemical reaction bin (26) is arranged in the second-stage biochemical reaction bin (27) and is coaxially arranged, the bottom of the first-stage biochemical reaction bin (26) is fixedly connected with the bottom of the inner wall of the second-stage biochemical reaction bin (27), the inner wall of the first-stage biochemical reaction bin (26) is fixedly connected with an inner bin conical plate (7), the bottom of the inner bin conical plate (7) is fixedly connected with the bottom of the inner wall of the second-stage biochemical reaction bin (27), a circle of outer bin partition plate (11) is arranged between the first-stage biochemical reaction bin (26) and the second-stage biochemical reaction bin (27), an annular mud collection bin (15) is arranged between the bottom of the outer bin partition plate (11) and the bottom of the inner wall of the second-stage biochemical reaction bin (27), the bottom of the annular mud collection bin (15) is fixedly connected with the bottom of the inner wall of the second-stage biochemical reaction bin (27), and the top of the outer wall of the annular mud collection bin (15) is fixedly connected with the bottom of the outer bin partition plate (11), the bottom of one side of the second-stage biochemical reaction bin (27) is provided with a first-stage sewage inlet header pipe (1), a circle of outer bin conical plate (17) is fixedly connected between the bottom of the side wall of the outer bin partition plate (11) and the inner wall of the second-stage biochemical reaction bin (27), one end of the first-stage sewage inlet header pipe (1) sequentially penetrates through the side wall of the second-stage biochemical reaction bin (27), the outer bin conical plate (17), the annular sludge collection bin (15), the side wall of the first-stage biochemical reaction bin (26) and the side wall of the inner bin conical plate (7), the outer wall of the first-stage sewage inlet header pipe (1) is fixedly connected with the side wall of the second-stage biochemical reaction bin (27), the outer bin conical plate (17), the annular sludge collection bin (15), the side wall of the first-stage biochemical reaction bin (26) and the side wall of the inner bin conical plate (7) in a sealing manner, and a first-stage biochemical reaction sludge discharge pipe (8) is arranged at the bottom of the other side of the second-stage biochemical reaction bin (27), one end of the one-level biochemical reaction sludge discharge pipe (8) sequentially penetrates through the side wall of the second-level biochemical reaction bin (27), the outer bin conical plate (17), the annular sludge collection bin (15), the side wall of the one-level biochemical reaction bin (26) and the side wall of the inner bin conical plate (7), the outer wall of the one-level biochemical reaction sludge discharge pipe (8) is fixedly connected with the side wall of the second-level biochemical reaction bin (27), the outer bin conical plate (17), the annular sludge collection bin (15), the side wall of the one-level biochemical reaction bin (26) and the side wall of the inner bin conical plate (7) in a sealing manner, the one-level sewage water inlet header pipe (1) is fixedly connected with the second-level sewage water inlet pipe (2) at the outer wall of one end of the second-level biochemical reaction bin (27), the second-level sewage water inlet pipe (2) is provided with the second-level sewage water inlet regulating valve (3), the second-level sewage inlet pipe (2) is communicated with the one-level sewage water inlet header pipe (1), and the other end of the second-level sewage water inlet pipe (2) sequentially penetrates through the side wall of the biochemical reaction bin conical plate (27) and the outer bin baffle (11) ) And is fixedly connected with the side wall of the second-level biochemical reaction bin (27) and the outer bin partition plate (11) in a sealing way, a second-level biological reaction bin mud discharging pipe (16) is arranged at the bottom of the side wall of the second-level biochemical reaction bin (27) between the first-level sewage inlet header pipe (1) and the first-level biochemical reaction mud discharging pipe (8) according to the circumference, the second-level biological reaction bin mud discharging pipe (16) sequentially penetrates through the side wall of the second-level biochemical reaction bin (27), the outer bin conical plate (17) and the side wall of the annular mud collecting bin (15) to the annular mud collecting bin (15), the second-level biological reaction bin mud discharging pipe (16) is fixedly connected with the side wall of the second-level biochemical reaction bin (27), the side wall of the annular mud collecting bin (15) and the outer bin partition plate (11) in a sealing way, the side wall of the outer bin partition plate (11) is provided with outer bin partition plate bottom mud discharging holes (13) uniformly according to the circumference below the first-level biochemical reaction mud discharging pipe (8) and the second-level biological reaction bin mud discharging pipe (16), one-level biochemical reaction storehouse (26) outer wall and outer storehouse baffle (11) inner wall between one-level biochemical reaction mud pipe (8) and second grade biological reaction storehouse mud pipe (16) top fixed connection round trompil toper board (14), outer storehouse baffle (11) lateral wall is according to even the having seted up a plurality of outer storehouse baffle rectangular holes (12) of circumference in trompil toper board (14) top, a plurality of rectangle overflow holes (9) have been seted up according to even running through of circumference in one-level biochemical reaction storehouse (26) lateral wall top.
2. The enhanced domestic sewage nitrogen and phosphorus removal treatment device of claim 1, wherein: the delivery port department fixedly connected with of second grade biochemical reaction storehouse (27) lateral wall goes out water house steward (19), be provided with round triangle weir water catch bowl (18) between second grade biochemical reaction storehouse (27) inner wall and outer storehouse baffle (11) outer wall, triangle weir water catch bowl (18) and second grade biochemical reaction storehouse (27) inner wall fixed connection, and triangle weir water catch bowl (18) flushes with the inner wall top that second grade biochemical reaction storehouse (27) is adjacent and goes out water house steward (19) inner wall bottom.
3. The enhanced domestic sewage nitrogen and phosphorus removal treatment device of claim 1, wherein: one end fixed mounting including one-level sewage inlet manifold (1) in storehouse toper board (7) has umbrella formula water-blocking plate (4), a plurality of water jet holes (5) have been seted up in one-level sewage inlet manifold (1) top in umbrella formula water-blocking plate (4).
4. The enhanced domestic sewage nitrogen and phosphorus removal treatment device of claim 3, wherein: the diameter of the water jetting hole (5) is 30mm, and the sum of the areas of the water jetting hole (5) is not more than one fifth of the area of the first-level sewage inlet main pipe (1).
5. The enhanced domestic sewage nitrogen and phosphorus removal treatment device of claim 1, wherein: the outer wall of the primary biochemical reaction bin (26) is fixedly connected with a circle of conical guide plate (10) below the rectangular overflow hole (9).
6. The enhanced domestic sewage nitrogen and phosphorus removal treatment device of claim 1, wherein: outer storehouse baffle (11) inner wall fixedly connected with round second grade sewage perforation water distribution groove (6), one side that second grade sewage perforation water distribution groove (6) are close to one-level biochemical reaction storehouse (26) lateral wall is provided with a plurality of second grade sewage according to the circumference is even and perforates, and second grade sewage perforation water distribution groove (6) are linked together with second grade sewage inlet tube (2).
7. The enhanced domestic sewage nitrogen and phosphorus removal treatment device of claim 1, wherein: the top coaxial common fixed connection mounting bracket (29) of one-level biochemical reaction storehouse (26) lateral wall, outer storehouse baffle (11) and second grade biochemical reaction storehouse (27) lateral wall, mounting bracket (29) top center fixed mounting has voltage-sharing air distributor (20), voltage-sharing air distributor (20) have a plurality of air ducts (28) according to the even UNICOM of circumference, air duct (28) screw thread UNICOM has one-level air pipe (21), one-level air pipe (21) bottom is at one-level biochemical reaction storehouse (26) internal fixation intercommunication have one-level tubular aerator (25), air duct (28) bottom has second grade air pipe (23) in one-level air pipe (21) outside screw thread UNICOM, second grade air pipe (23) are in between outer storehouse baffle (11) and triangle weir water catch bowl (18), second grade air pipe (23) bottom is fixed intercommunication has second grade tubular aerator (24) between outer storehouse baffle (11) and second grade biochemical reaction storehouse (27) ) And a secondary air volume adjusting valve (22) is arranged between the primary air pipe (21) and the secondary air pipe (23) of the air duct (28).
8. A reinforced domestic sewage denitrification and dephosphorization treatment method is characterized in that: the method comprises the following steps:
the method comprises the following steps: domestic sewage enters a first-stage biochemical reaction bin (26) through a first-stage sewage inlet header pipe (1), enters a second-stage sewage perforation water distribution tank (6) through a second-stage sewage inlet pipe (2), enters an anoxic end in an outer bin partition plate (11) in a second-stage biochemical reaction bin (27) through water distribution holes;
step two: pressurized air generated by the operation of the fan enters a pressure equalizing air distributor (20), the primary air pipe (21) and the secondary air pipe (23) are used for aerating in a primary biochemical reaction chamber (26) and a secondary biochemical reaction chamber (27) through a primary tubular aerator (25) and a secondary tubular aerator (24), and the dissolved oxygen concentration of an anoxic zone and an aerobic zone is controlled through a secondary air quantity regulating valve (22);
step three: preliminary phosphorus removal is carried out in an anaerobic zone in a first-stage biochemical reaction chamber (26), deep phosphorus removal is carried out in a local anaerobic zone in an outer chamber partition plate (11) in the first-stage biochemical reaction chamber (26) and a second-stage biochemical reaction chamber (27), short-range nitration reaction and denitrification reaction are carried out in the first-stage biochemical reaction chamber (26), a part of nitrogen is removed, upper-layer digestive juice uniformly enters the outer chamber partition plate (11) of the second-stage biochemical reaction chamber (27) through a rectangular overflow hole (9) and a conical guide plate (10) to carry out deep nitrogen removal;
step four: the sludge in the first-stage biochemical reaction bin (26) falls into the inner bin conical plate (7) to slide down and enter the bottom, and enters the sludge tank through the first-stage biological reaction sludge discharge pipe (8), and the sludge in the second-stage biochemical reaction bin (27) enters the annular sludge collection bin (15) through the sludge discharge hole (13) at the bottom of the outer bin partition plate and the perforated conical plate (14), and enters the sludge tank through the second-stage biological reaction bin sludge discharge pipe (16);
step five: the sewage treated by the biochemical reaction for two times is immersed in a water collecting tank (18) of the triangular weir and is discharged into a secondary sedimentation tank by a water outlet main pipe (19).
9. The enhanced domestic sewage nitrogen and phosphorus removal treatment method according to claim 8, wherein: in the first step, the inflow rate of the secondary sewage is controlled by the secondary sewage inflow regulating valve (3), and the inflow rate control range of the secondary sewage is between 10 and 25 percent of the total amount of the sewage.
10. The enhanced domestic sewage nitrogen and phosphorus removal treatment method according to claim 8, wherein: in the second step, the dissolved oxygen concentration of the anoxic zone and the aerobic zone is controlled by a secondary air volume regulating valve (22), so that the oxygen concentration of the anoxic zone is ensured to be 0.2-0.5mg/L and strictly lower than 0.2, and the dissolved oxygen concentration of the aerobic zone is controlled to be 1.2-1.8 mg/L.
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