CN113149204A - Infiltration bed reaction device for sulfur autotrophic denitrification biological denitrification - Google Patents
Infiltration bed reaction device for sulfur autotrophic denitrification biological denitrification Download PDFInfo
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- CN113149204A CN113149204A CN202110452114.XA CN202110452114A CN113149204A CN 113149204 A CN113149204 A CN 113149204A CN 202110452114 A CN202110452114 A CN 202110452114A CN 113149204 A CN113149204 A CN 113149204A
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- reaction tank
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- backwashing
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 88
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 36
- 239000011593 sulfur Substances 0.000 title claims abstract description 36
- 230000001651 autotrophic effect Effects 0.000 title claims abstract description 35
- 230000008595 infiltration Effects 0.000 title description 3
- 238000001764 infiltration Methods 0.000 title description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 130
- 238000011001 backwashing Methods 0.000 claims abstract description 96
- 238000012856 packing Methods 0.000 claims abstract description 75
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 20
- 238000010517 secondary reaction Methods 0.000 claims abstract description 16
- 238000005325 percolation Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims description 20
- 238000011010 flushing procedure Methods 0.000 claims description 17
- 229920002994 synthetic fiber Polymers 0.000 claims description 15
- 239000006185 dispersion Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 229910021536 Zeolite Inorganic materials 0.000 claims description 4
- 239000000872 buffer Substances 0.000 claims description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 239000010457 zeolite Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 238000011026 diafiltration Methods 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000000945 filler Substances 0.000 abstract description 27
- 239000002351 wastewater Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 6
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 description 18
- 230000009286 beneficial effect Effects 0.000 description 10
- 241001509286 Thiobacillus denitrificans Species 0.000 description 5
- 244000005700 microbiome Species 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
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- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
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- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
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Images
Classifications
-
- 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
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention discloses a percolation bed reaction device for sulfur autotrophic denitrification biological denitrification, which comprises a main structure, a water inlet and distribution device, a backwashing system, a packing layer and a suspended matter removing device, wherein a primary reaction tank and a secondary reaction tank are arranged in the main structure in parallel, the water inlet and distribution device is connected to the top end of the reaction tank, the backwashing system is connected to the bottom end of the reaction tank, the packing layer is connected to the inside of the reaction tank, the suspended matter removing device is connected to the inside of the main structure, and the two suspended matter removing devices are respectively arranged between the primary reaction tank and the secondary reaction tank and on one side of the main structure close to the secondary reaction tank. The invention solves the problem of easy blockage after filler demoulding, realizes the backwashing process without stopping, thereby realizing the ultimate removal of total nitrogen, reducing the cost, saving the investment, avoiding the material loss and waste, reducing the equipment blockage, simultaneously removing suspended matters, filling the blank in the technical field of treating low-load nitrogen-containing wastewater, and having feasibility in engineering application.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a percolation bed reaction device for denitrogenation of sulfur autotrophic denitrification organisms.
Background
With the increasing public requirements on the environmental quality, the control standard of nitrogen pollutants is more and more strict, and the discharge amount of nitrogen pollutants in the polluted water body in China far exceeds the environmental capacity. The traditional heterotrophic denitrification technology depends on an externally added organic carbon source, has high cost, is difficult to remove nitrate to a lower level, and makes up for various defects of the traditional technology under the complicated water inlet condition by using sulfide with reducibility as an electron donor. Due to unique climatic conditions, pipe network arrangement, dietary habits and the like in southern areas of China, the sewage is characterized by being 'poor nutrition', the total nitrogen content in the water body is low, the water quantity is uniform, and the range is about 15-20 mg/L. The existing sulfur autotrophic denitrification technology is applied to treat the nitrogen-containing sewage, the treatment capacity is not matched with the treatment capacity, the materials are easy to lose in large quantity, the equipment is high in operation consumption and low in efficiency, and the whole nitrogen-containing sewage is in a waste state.
Therefore, the percolation bed reaction device for the biological nitrogen removal of the sulfur autotrophic denitrification is provided for the low-concentration total nitrogen sewage, the limit removal of low-load total nitrogen is realized in a low-energy consumption state, the total nitrogen content of effluent is ensured to be below 5mg/L, the cost is effectively reduced, and the large-scale application can be realized.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a percolation bed reaction device for the biological denitrification by sulfur autotrophic denitrification, which solves the problem of easy blockage after the membrane removal of a filler, and realizes the non-stop backwashing process, thereby realizing the ultimate removal of total nitrogen, reducing the cost, saving the investment, avoiding the material loss and waste, reducing the equipment blockage, simultaneously removing suspended matters, filling the blank of the technical field of treating low-load nitrogen-containing wastewater, and having feasibility in engineering application; it includes:
major structure, the water distribution device of intaking, back flush system, packing layer and remove the suspended solid device, inside one-level reaction tank and the second grade reaction tank of having seted up side by side of major structure, the water distribution device of intaking connect in the reaction tank top, back flush system connect in the reaction tank bottom, the packing layer connect in inside the reaction tank, remove the suspended solid device connect in inside the major structure, and two remove the suspended solid device arrange respectively between one-level reaction tank and second grade reaction tank with one side that major structure is close to the second grade reaction tank.
Preferably, the major structure is buried underground, the major structure is the setting of cuboid, and the length of major structure sets up to 8 ~ 10m, and the width sets up to 5 ~ 8m, highly sets up to 4 ~ 5m, the major structure is close to the lateral wall of one-level reaction tank and has seted up the reservation mouth.
Preferably, the percolating bed reactor for biological denitrification by sulfur autotrophic denitrification further comprises: the overflow weir groove is arranged in the main body structure and communicated with the reaction tank, and the overflow weir groove is arranged between the primary reaction tank and the secondary reaction tank and on one side of the main body structure close to the secondary reaction tank; the overflow weir is connected to the side end of the main structure and is arranged close to the secondary reaction tank, the inner cavity of the overflow weir is communicated with the overflow weir groove through an overflow port, and the side wall of the overflow weir is provided with a water outlet.
Preferably, remove the suspended solid device connect in inside the overflow weir groove, arrange between one-level reaction tank and second grade reaction tank remove the suspended solid device and pass through the water distribution device intercommunication of intaking in two-stage connecting pipe and the second grade reaction tank, the two-stage connecting pipe sets up to the band pump water pipe, it is the tube-shape setting to remove the suspended solid device, and remove the inside fixedly connected with of suspended solid device flocculent brush group.
Preferably, the packing layer comprises a dispersion packing layer, a packing module and a bearing layer which are sequentially connected from top to bottom, the height of the dispersion packing layer is 0.6-0.8 m, and the dispersion packing layer is prepared by mixing and stacking a sulfur autotrophic denitrification synthetic material and ceramsite, zeolite and volcanic rock with rough and porous surfaces; the height of the bearing layer is 0.3-0.5 m, and the bearing layer is composed of one or more of cobblestones and common stones.
Preferably, the filler module is formed by the staggered arrangement of filler plates, the filler module is stacked and placed, the number of stacked layers is 6-8, the filler plates are made of polypropylene materials, corrugated grid holes are formed in the filler plates, and sulfur autotrophic denitrification synthetic materials are inlaid in the corrugated grid holes.
Preferably, the sulfur autotrophic denitrification synthetic material is prepared by taking 400-mesh modified sulfur powder as a matrix, mixing the modified sulfur powder with biological activated carbon, a calcium carbonate adhesive, calcium oxide powder and a sodium bicarbonate buffer according to the proportion of 5:2:1:1:1, heating to 150-185 ℃ at the speed of 8-10 ℃/min, heating at a constant temperature for 30min, and cooling.
Preferably, the backwash system comprises:
the device comprises an online control system, back washing water pumps, an air blower, back washing pipelines and back washing plates, wherein the two back washing plates are respectively connected to the bottom ends of the inner walls of a primary reaction tank and a secondary reaction tank, a plurality of flushing holes are arranged on the back washing plates in an array manner, a one-way valve is arranged between each back washing plate and each flushing hole, the back washing pipelines are communicated with the bottom ends of the two back washing plates, the back washing pipelines penetrate through a main structure and extend to one side of the main structure, the two back washing water pumps are arranged on the back washing pipelines, the two back washing water pumps are respectively arranged close to the primary reaction tank and the secondary reaction tank, the air blower is connected to the middle part of the back washing pipelines through pipelines, one end of each back washing pipeline is provided with a back washing water inlet, the online control system is connected to one end of each back washing pipeline close to the back washing water inlet, the online control system is electrically connected with the backwashing water pump and the blower.
Preferably, a percolation bed reaction device of biological nitrogen removal is denitrified to sulfur autotrophic denitrification still includes protector, protector connect in the major structure top, protector includes:
the plurality of sleeves are uniformly connected to the top end of the main body structure, a press switch connected with the main body structure is arranged in each sleeve, the press switches are electrically connected with the alarm, and grooves are symmetrically formed in the side ends of the inner walls of the sleeves;
the protective plate is connected to the top end of the barrel wall of the sleeve through a spring, and a sliding groove is formed in the middle of the protective plate;
the pressing block is connected in the sliding groove in a limiting and sliding mode and vertically and downwards extends into the sleeve;
one ends of the two sliding blocks are symmetrically connected to the outer side of the pressing block, the other ends of the sliding blocks extend into the grooves, and a plurality of first clamping teeth are uniformly arranged at the extending ends of the sliding blocks;
the sliding plate is connected to the inner wall of the groove in a sliding mode, and a spring is connected between the bottom end of the sliding plate and the groove;
the second clamping teeth are uniformly connected to the inner wall of the groove through a rotating shaft in the middle, the second clamping teeth are arranged in a bent mode, one end of each second clamping tooth is clamped with the corresponding first clamping tooth, and the other end of each second clamping tooth is movably connected with the sliding plate;
the sliding button is fixedly connected to one end, far away from the second clamping tooth, of the sliding plate, the sliding button is connected to the side wall of the sleeve in a limiting and sliding mode, and the sliding button extends out of the sleeve;
the gear is connected to the inner wall of the groove through a rotating shaft;
the two racks are connected to the inner wall of the groove in a sliding mode, are arranged in a centrosymmetric mode by taking a gear rotating shaft as a center, and are meshed with the gear at the same time;
and one ends of the two connecting rods are respectively hinged to the side ends of the two racks, the other ends of the two connecting rods are simultaneously hinged to the clamping block, and the clamping block and the pressing block are adaptive to each other.
Preferably, the percolating bed reactor for biological denitrification by sulfur autotrophic denitrification further comprises:
the backwashing prompting device comprises a flowmeter electrically connected with the online control system, the flowmeter is arranged in the backwashing pipeline and used for monitoring the real-time flow of backwashing water, the backwashing prompting device is used for monitoring the striking force condition of the backwashing water on the packing layer in real time, the striking force of the backwashing water on the packing layer is calculated according to a preset algorithm, whether the water inflow of the backwashing water pump is adjusted or not is determined according to the calculation result, and the specific steps of the preset algorithm are as follows:
step A1, solving and obtaining the hitting power of the backwashing water on the packing layer according to the following formula:
f is the impact force of the back washing water on the packing layer obtained through solving, q is the real-time flow of the back washing water, the real-time flow is obtained through detection of the flow meter, mu is the flow coefficient of a nozzle of the flushing hole, and d is the diameter of the outlet section of the nozzle of the flushing hole;
step A2, according to the impact force F of the backwashing water obtained in step A1 on the packing layer, when the impact force F of the backwashing water on the packing layer reaches the upper limit value F of the preset impact force0When the impact force F of the backwashing water on the packing layer does not reach the preset impact force upper limit value F, the online control system adjusts the water inflow of the backwashing water pump, and the impact force F of the backwashing water on the packing layer is not larger than the preset impact force upper limit value F0No adjustment is required at this time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a packing sheet according to the present invention;
FIG. 3 is a schematic structural view of a backwash system of the present invention;
FIG. 4 is a schematic cross-sectional view of the structure of the protective device of the present invention;
FIG. 5 is a schematic partial cross-sectional view of the structure of FIG. 4 at A in accordance with the present invention;
fig. 6 is a cross-sectional view of a gear and rack structure of the guard of the present invention.
In the figure: 1. a water inlet and distribution device; 2. a dispersed filler layer; 3. a packing module; 4. a support layer; 5. an overflow weir trough; 6. a suspended matter removing device; 7. a two-stage connecting pipe; 8. an overflow port; 9. an overflow weir; 10. backwashing the water inlet; 11. an online control system; 12. backwashing the water pump; 13. a blower; 14. back flushing the pipeline; 15. back washing the plate; 16. reserving a hole; 17. a water outlet; 18. a body structure; 101. a sleeve; 102. a push switch; 103. a groove; 104. a protection plate; 105. a chute; 106. a pressing block; 107. a slider; 108. a first latch; 109. a sliding plate; 110. a second latch; 111. a slide button; 112. a gear; 113. a rack; 114. a connecting rod; 115. and (5) clamping blocks.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
Examples
The invention will be further described with reference to the accompanying drawings.
As shown in fig. 1 to 6, the present embodiment provides a percolation bed reactor for denitrogenation of sulfur autotrophic denitrification organisms, comprising:
The working principle of the invention is as follows:
the invention provides a percolation bed reaction device for biological denitrification by sulfur autotrophic denitrification, which is characterized in that before operation, domesticated thiobacillus denitrificans is inoculated on a filler module 3 and sprayed with a liquid sulfur source for early domestication; secondly, the raw water of the low-load total nitrogen wastewater enters a primary reaction tank through a water inlet and distribution device 1 and is uniformly sprinkled on a dispersed filler layer 2 formed by mixing a denitrification synthetic material and ceramsite, and water flows through a filler module 3 and a supporting layer 4 from top to bottom; then, the water flow gradually rises until the water flow reaches an overflow weir notch 5, in the process, thiobacillus denitrificans and a small amount of heterotrophic denitrifying bacteria are continuously enriched and attached to a dispersion filler layer and a filler module to reduce nitrate in the water body into nitrogen to escape; then, the water in the overflow weir notch 5 flows into a suspended matter removing device 6, a flocculent hairbrush is fixed in the device, and suspended particles in the water body, and filler demoulding residues, impurities and the like after backwashing can be intercepted and collected; along with the action of a water pump, water in the cylinder of the suspended matter removing device 6 is pumped into the two-stage connecting pipe 7 and flows into the water inlet and distribution device 1 of the second-stage reaction tank, the operation flow of the second-stage reaction tank is the same as that of the first-stage reaction tank, and the water enters the overflow weir 9 through the overflow port 8 and finally flows out of the water outlet 17; backwash water enters a pipeline from a water inlet 10, an online control system 11 starts a backwash water pump 12 and a blower 13 to introduce gas into the backwash water, and the backwash water is uniformly distributed in a backwash plate 15 through a backwash pipeline 14 and washes a packing layer through a flushing hole.
The invention has the beneficial effects that:
the invention provides a percolation bed reaction device for denitrogenation of sulfur autotrophic denitrification organisms, which dispersedly embeds sulfur autotrophic denitrification synthetic materials into a filler module 3, avoids material loss through a staggered stacking mode of the filler module 3, realizes maximum utilization of the materials, provides a good attachment and living environment for thiobacillus denitrificans by the sulfur autotrophic denitrification synthetic fillers, improves microbial activity, promotes efficient denitrogenation of denitrifying bacteria, effectively removes suspended matters in a water body through installing a suspended matter removing device 6 in an overflow weir groove 5, solves the problem of easy blockage after the filler is subjected to membrane removal through utilizing a gas-water combined backwashing mode and arranging a one-way valve in a bottom backwashing plate 15, and realizes a non-stop backwashing process, thereby realizing ultimate removal of total nitrogen, reducing cost and investment, avoiding material loss and waste, reducing equipment blockage, Meanwhile, suspended matters can be removed, the blank of the technical field of treating low-load nitrogen-containing wastewater is filled, and the method has feasibility in engineering application.
In one embodiment, the main body structure 18 is buried underground, the main body structure 18 is a cuboid, the length of the main body structure 18 is set to be 8-10 m, the width of the main body structure 18 is set to be 5-8 m, the height of the main body structure 18 is set to be 4-5 m, and a reserved opening 16 is formed in the side wall, close to the primary reaction tank, of the main body structure 18.
The working principle and the beneficial effects of the technical scheme are as follows:
bury main structure 18 underground, the earth's surface above the device can regard as afforestation or other land used, and area is little, saves disposable investment, maintains the convenience, sets up main structure 100 into the cuboid, for the one-level reaction tank and the second grade reaction tank of seting up side by side provide accommodation space, realizes effectively protecting to each subassembly in the reaction unit.
In one embodiment, as shown in fig. 2, the percolator bed reactor for biological denitrification by sulfur autotrophic denitrification further comprises:
the overflow weir trough 5 and the overflow weir 9, the overflow weir trough 5 is arranged in the main structure 18 and is communicated with the reaction tank, the overflow weir trough 5 is arranged between the primary reaction tank and the secondary reaction tank and on one side of the main structure 18 close to the secondary reaction tank; the overflow weir 9 is connected to the side end of the main structure 18 and is arranged close to the secondary reaction tank, the inner cavity of the overflow weir 9 is communicated with the overflow weir groove 5 through an overflow port 8, and a water outlet 17 is formed in the side wall of the overflow weir 9.
The working principle and the beneficial effects of the technical scheme are as follows:
inside the overflow weir notch 5 was seted up in major structure 18, as the circulation passageway of waste water, waste water in the one-level reaction tank progressively rises, rivers flow in overflow weir notch 5 between one-level reaction tank and the second grade reaction tank, get into and remove suspended solid device 6 and filter, along with the water pump effect, remove the inside water of 6 barrel of suspended solid device and get into two-stage connecting pipe 7 by the suction, then in waste water gets into the second grade reaction tank, waste water in the second grade reaction tank progressively rises, rivers flow in major structure 18 and are close to one side overflow weir notch 5 of second grade reaction tank, get into and remove suspended solid device 6 and filter, and then flow in overflow weir 9 through overflow mouth 8, overflow weir 9 stores rivers, and discharge through delivery port 17. Overflow weir groove 5 removes suspended solid device 6 and provides installation space to realize effective intercommunication with one-level reaction tank and second grade reaction tank, form the water circulation way in major structure 18, guarantee that waste water rivers are unobstructed, overflow weir 9 provides storage space for the waste water after handling.
As shown in fig. 3, in one embodiment, the suspension removing device 6 is connected inside the overflow weir trough 5, the suspension removing device 6 arranged between the primary reaction tank and the secondary reaction tank is communicated with the water inlet and distribution device 1 in the secondary reaction tank through a two-stage connecting pipe 7, the two-stage connecting pipe 7 is configured as a water pipe with a pump, the suspension removing device 6 is configured in a cylindrical shape, and a flocculent hairbrush set is fixedly connected inside the suspension removing device 6.
The working principle and the beneficial effects of the technical scheme are as follows:
remove the suspended solid device connect between one-level reaction tank and second grade reaction tank and major structure 18 is close to 5 insides of overflow weir groove of one side of second grade reaction tank, remove the suspended solid device and be the tube-shape setting, inside is fixed with flocculent brush group, the device submergence is in overflow weir groove 5, in the rivers income section of thick bamboo in the overflow weir groove 5, the suspended solid granule of flocculent brush group in aquatic, the residue after the filler deciduate is caught and is collected, prevent that the suspended solid in the water from flowing into the overflow weir, further improve the cleanliness factor of water, be convenient for carry out the degree of depth clearance.
As shown in fig. 4, in one embodiment, the packing layer comprises a dispersion packing layer 2, a packing module 3 and a supporting layer 4 which are sequentially connected from top to bottom, the height of the dispersion packing layer 2 is 0.6-0.8 m, and the dispersion packing layer is made by mixing and stacking a sulfur autotrophic denitrification synthetic material, and ceramsite, zeolite and volcanic rock with rough and porous surfaces; the height of the bearing layer 4 is 0.3-0.5 m, and the bearing layer is composed of one or more of cobblestones and common stones.
The working principle and the beneficial effects of the technical scheme are as follows:
the packing layer is divided into three parts, the lowest layer is a bearing layer, the height range is 0.3-0.5 m, the packing layer mainly comprises cobblestones, common stones and the like, the bearing effect is realized on the dispersed packing layer 2 and the packing module 3, the uppermost layer is dispersed packing, the layer height is 0.6-0.8 m, the sulfur autotrophic denitrification synthetic material is mixed and stacked with ceramsite, zeolite and volcanic rock which are rough in surface and porous, and the purpose is to increase the specific surface area and facilitate the attachment of microorganisms. After being uniformly sprinkled on the dispersed filler layer 2, water flows from top to bottom through the filler module 3 and the bearing layer 4, the thiobacillus denitrificans and a small amount of heterotrophic denitrifying bacteria are continuously enriched and attached in the dispersed filler layer 2 and the filler module 3, and nitrate in the water body is reduced into nitrogen to escape.
As shown in fig. 2, in an embodiment, the packing modules 3 are formed by arranging packing plates in a staggered manner, the packing modules 3 are stacked, the number of the stacked layers is set to 6-8, the packing plates are made of polypropylene materials, the packing plates are provided with corrugated grid holes, and sulfur autotrophic denitrification synthetic materials are embedded in the corrugated grid holes.
The working principle and the beneficial effects of the technical scheme are as follows:
through inlaying this kind of mode of synthetic material in ripple hole filler plate, increased microorganism living space, be favorable to the microorganism to adhere to, solved the denitrification in-process and replaced the problem that the sulphur simple substance as electron donor dissolves the loss along with the water body easily to need not a large amount of fillers and pile up, avoided extravagant, improved material utilization ratio, make the denitrogenation benefit maximize on unit space.
In one embodiment, the sulfur autotrophic denitrification synthetic material is prepared by taking 400-mesh modified sulfur powder as a matrix, mixing the modified sulfur powder with biological activated carbon, a calcium carbonate adhesive, calcium oxide powder and a sodium bicarbonate buffer according to the proportion of 5:2:1:1:1, heating to 150-185 ℃ at the speed of 8-10 ℃/min, heating at a constant temperature for 30min, and cooling.
The working principle and the beneficial effects of the technical scheme are as follows:
the sulfur autotrophic denitrification synthetic material is adopted, the surface of the synthetic material is natural and porous, the capacity of loading microorganisms is strong, the capacity of improving the activity of the microorganisms is realized, thiobacillus denitrificans is enriched and propagated in a large quantity in a short time, reductive sulfur simple substances are taken as electron donors to carry out autotrophic reaction, nitrate nitrogen in water is converted into nitrogen to escape, generated sulfate is gradually stabilized under the buffer action of the material, and meanwhile heterotrophic denitrification bacteria in the water continue denitrification reaction by taking a small amount of biological activated carbon as energy.
As shown in fig. 3, in one embodiment, the backwash system includes:
the device comprises an online control system 11, backwash water pumps 12, an air blower 13, backwash pipelines 14 and backwash plates 15, wherein the two backwash plates 15 are respectively connected to the bottom ends of the inner walls of a first-stage reaction tank and a second-stage reaction tank, a plurality of flushing holes are formed in the backwash plates 15 in an array manner, a one-way valve is arranged between each backwash plate 15 and each flushing hole, the backwash pipelines 14 are communicated with the bottom ends of the two backwash plates 15, the backwash pipelines 14 penetrate through a main structure 18 and extend to one side of the main structure 18, the two backwash water pumps 12 are arranged on the backwash pipelines 14, the two backwash water pumps 12 are respectively arranged close to the first-stage reaction tank and the second-stage reaction tank, the air blower 13 is connected to the middle part of the backwash pipelines 14 through a pipeline, one end of each backwash pipeline 14 is provided with a backwash water inlet 10, the online control system 11 is connected to one end of each backwash pipeline 14, which is close to the backwash water inlet 10, the online control system 11 is electrically connected with a backwashing water pump 12 and a blower 13.
The working principle and the beneficial effects of the technical scheme are as follows:
backwash water enters a backwash pipeline 14 from a water inlet 10, an online control system 11 starts a backwash water pump 12 and a blower 13, gas is introduced into the backwash water, and the gas is uniformly distributed in a backwash plate 15 through the backwash pipeline 14 and washes the packing layer through the flushing holes. The backwashing process adopts a gas-water combined mode, the particle collision times and the water flow shearing force for flushing the mixed medium are increased, a better backwashing effect is achieved for filler demoulding, two groups of backwashing water pumps 12 and air blowers 13 are arranged on the ground and are started by an online automatic control system 11, a backwashing pipeline 14 is buried underground and enters a backwashing plate 15 laid at the bottom end of the inner wall of the reaction tank, a one-way valve is arranged between the inside of the backwashing plate 15 and a flushing hole, the one-way valve can cause negative pressure at an outlet to form vacuum, the backflow blockage of backwashing water is effectively avoided, the problem that the filler is easy to block after demoulding is solved, and the non-stop backwashing process is achieved.
In one embodiment, as shown in fig. 4-6, the percolator bed reactor for biological denitrification of sulfur autotrophic nitrogen further comprises a guard device, which is arranged on the top of the main body structure 18 and comprises:
the sleeves 101 are uniformly connected to the top end of the main body structure 18, a push switch 102 connected with the main body structure 18 is arranged in each sleeve 101, the push switches 102 are electrically connected with an alarm, and grooves 103 are symmetrically formed in the side end of the inner wall of each sleeve 101;
the protective plate 104 is connected to the top end of the cylinder wall of the sleeve 101 through a spring, and a sliding groove 105 is formed in the middle of the protective plate 104;
the pressing block 106 is connected in the sliding groove 105 in a limiting and sliding manner, and the pressing block 106 vertically extends downwards to the inside of the sleeve 101;
one ends of the two sliding blocks 107 are symmetrically connected to the outer side of the pressing block 106, the other end of each sliding block 107 extends into the corresponding groove 103, and a plurality of first clamping teeth 108 are uniformly arranged at the extending end of each sliding block 107;
the sliding plate 109 is connected to the inner wall of the groove 103 in a sliding manner, and a spring is connected between the bottom end of the sliding plate 109 and the groove 103;
the second latch 110 is uniformly connected to the inner wall of the groove 103 through a rotating shaft in the middle, the second latch 110 is bent, one end of the second latch 110 is clamped with the first latch 108, and the other end of the second latch 110 is movably connected with the sliding plate 109;
the sliding button 111 is fixedly connected to one end, away from the second latch 110, of the sliding plate 109, the sliding button 111 is connected to a side wall of the sleeve 101 in a limiting and sliding manner, and the sliding button 111 extends out of the sleeve 101;
the gear 112 is connected to the inner wall of the groove 103 through a rotating shaft;
the two racks 113 are connected to the inner wall of the groove 103 in a sliding manner, the two racks 113 are arranged in a centrosymmetric manner by taking the rotating shaft of the gear 112 as the center, and the two racks 113 are simultaneously meshed and connected with the gear 112;
and one ends of the two connecting rods 114 are respectively hinged to the side ends of the two racks 113, the other ends of the two connecting rods 114 are simultaneously hinged to a clamping block 115, and the clamping block 115 and the pressing block 106 are arranged in a matching manner.
The working principle and the beneficial effects of the technical scheme are as follows:
the main structure 18 is buried, a protection device is arranged above the main structure 18, when the protection plate 104 is under pressure, the pressing block 106 slides in the sliding groove 105, the protection plate 104 is buffered and reset through a spring at the bottom end of the protection plate 104, when the protection plate 104 is under overlarge pressure, the top end of the pressing block 106 is in contact with the top end of the sliding groove 105, the pressing block 106 and the sliding block 107 are pushed to move downwards, the first latch 108 pushes the second latch 110 to rotate clockwise around the middle rotating shaft, meanwhile, the sliding plate 109 is driven to move upwards for a small distance, when the protection plate 104 does not descend any more, the sliding plate 109 resets under the action of the spring, the second latch 110 clamps the first latch 110, meanwhile, the sliding block 107 pushes the rack 113 above to move downwards, under the meshing transmission of the gear 112, the rack 113 below moves upwards synchronously, so as to drive the two connecting rods 114 to approach each other, the clamping block 115 approaches to the pressing block 106 and clamps the pressing block, the pressing block 106 is prevented from moving downwards, meanwhile, the bottom of the pressing block 106 is contacted with the pressing switch 102, an alarm is started, and a worker is reminded of maintaining; after the maintenance is completed, the sliding button 111 is pushed downward to drive the sliding plate 109 to move downward, so that the second latch 110 rotates to disengage from the first latch 108, and the protection plate 104 is reset.
Through the structure design, set up protector in main body framework 18 top, cushion the pressure that infiltration bed reaction unit received, when the atress is too big, the automatic start siren to protect main body framework 18 through guard plate 104, prevent to bury formula main body structure 18 and bury the degree of depth inadequately or the bearing capacity is not enough and cause structural damage, improve the reliability of device, make things convenient for the staff to carry out real time monitoring to device structural condition, avoid structural damage to arouse the incident.
In one embodiment, the percolator bed reactor for biological denitrification by sulfur autotrophic denitrification further comprises:
the backwashing prompting device comprises a flowmeter electrically connected with the online control system, the flowmeter is arranged in the backwashing pipeline 14 and used for monitoring the real-time flow of backwashing water, the backwashing prompting device is used for monitoring the striking force condition of the backwashing water on the packing layer in real time, the striking force of the backwashing water on the packing layer is calculated according to a preset algorithm, whether the water inflow of the backwashing water pump 12 is adjusted or not is determined according to a calculation result, and the preset algorithm comprises the following specific steps:
step A1, solving and obtaining the hitting power of the backwashing water on the packing layer according to the following formula:
f is the impact force of the back washing water on the packing layer obtained through solving, q is the real-time flow of the back washing water, the real-time flow is obtained through detection of the flow meter, mu is the flow coefficient of a nozzle of the flushing hole, and d is the diameter of the outlet section of the nozzle of the flushing hole;
step A2, according to the impact force F of the backwashing water obtained in step A1 on the packing layer, when the impact force F of the backwashing water on the packing layer reaches the upper limit value F of the preset impact force0When the impact force of the backwashing water on the packing layer is not reached to the preset impact force upper limit value F, the online control system adjusts the water inflow of the backwashing water pump 12, namely the impact force of the packing layer is too large, and when the impact force F of the backwashing water on the packing layer is not reached to the preset impact force upper limit value F0No adjustment is required at this time.
The working principle and the beneficial effects of the technical scheme are as follows:
by the calculation method, the real-time flow of the backwashing water is monitored, the impact force of the backwashing water on the packing layer is calculated, a theoretical basis is provided for judging whether the real-time flow of the backwashing water reaches the preset impact force upper limit value, the influence of real-time flow change on the impact force is corrected on the basis of the real-time flow of the backwashing water, the calculation accuracy is improved, when the impact force of the backwashing water on the packing layer reaches the preset impact force upper limit value, namely the impact force on the packing layer is overlarge, at the moment, the online control system adjusts the water inflow of the backwashing water pump 12, the situation that the packing layer is damaged due to the overlarge impact force on the packing layer is prevented, the washing is realized under the condition that the packing layer is not damaged, the service life of the packing layer is prolonged, and the reliability of the device is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A percolation bed reaction device for biological denitrification by sulfur autotrophic denitrification is characterized by comprising:
the device comprises a main structure (18), a water inlet and distribution device (1), a backwashing system, a packing layer and a suspended matter removing device (6), wherein a first-stage reaction tank and a second-stage reaction tank are arranged in the main structure (18) side by side, the water inlet and distribution device (1) is connected to the top end of the reaction tank, the backwashing system is connected to the bottom end of the reaction tank, the packing layer is connected to the inside of the reaction tank, the suspended matter removing device (6) is connected to the inside of the main structure (18), and the two suspended matter removing devices (6) are respectively arranged between the first-stage reaction tank and the second-stage reaction tank and on one side of the main structure (18) close to the second-stage reaction tank.
2. The percolation bed reactor device for the denitrification of the sulfur autotrophic nitrogen removal by the denitrification organisms according to claim 1, wherein the main structure (18) is buried underground, the main structure (18) is rectangular, the length of the main structure (18) is 8-10 m, the width of the main structure is 5-8 m, the height of the main structure is 4-5 m, and a reserved opening (16) is formed in the side wall, close to the primary reaction tank, of the main structure (18).
3. The apparatus of claim 2, further comprising: the overflow weir trough (5) and the overflow weir (9), the overflow weir trough (5) is arranged in the main structure (18) and is communicated with the reaction tank, the overflow weir trough (5) is arranged between the primary reaction tank and the secondary reaction tank and on one side of the main structure (18) close to the secondary reaction tank; the overflow weir (9) is connected to the side end of the main body structure (18) and is arranged close to the secondary reaction tank, the inner cavity of the overflow weir (9) is communicated with the overflow weir groove (5) through an overflow port (8), and a water outlet (17) is formed in the side wall of the overflow weir (9).
4. The diafiltration bed reaction unit according to claim 3, wherein the suspended matter removing device (6) is connected inside the overflow weir trough (5), arranged between the first-stage reaction tank and the second-stage reaction tank the suspended matter removing device (6) is communicated with the water inlet and distribution device (1) inside the second-stage reaction tank through a two-stage connecting pipe (7), the two-stage connecting pipe (7) is set as a water pipe with a pump, the suspended matter removing device (6) is in a cylindrical shape, and the flocculent brush set is fixedly connected inside the suspended matter removing device (6).
5. The percolation bed reactor of the sulfur autotrophic denitrification biological nitrogen removal according to claim 1, wherein the packing layer comprises a dispersion packing layer (2), a packing module (3) and a supporting layer (4) which are sequentially connected from top to bottom, the height of the dispersion packing layer (2) is 0.6-0.8 m, and the dispersion packing layer is prepared by mixing and stacking a sulfur autotrophic denitrification synthetic material with coarse and porous ceramsite, zeolite and volcanic rock; the height of the bearing layer (4) is 0.3-0.5 m, and the bearing layer is composed of one or more of cobblestones and common stones.
6. The percolation bed reactor of the sulfur autotrophic denitrification biological nitrogen removal according to claim 1, wherein the packing modules (3) are formed by staggered arrangement of packing plates, the packing modules (3) are stacked, the number of stacked layers is set to 6-8, the packing plates are made of polypropylene materials, the packing plates are provided with corrugated grid holes, and the sulfur autotrophic denitrification synthetic materials are embedded in the corrugated grid holes.
7. The percolation bed reactor of the sulfur autotrophic denitrification biological nitrogen removal according to claim 5, wherein the sulfur autotrophic denitrification synthetic material is prepared by mixing 400-mesh modified sulfur powder as a matrix, biological activated carbon, calcium carbonate adhesive, calcium oxide powder and sodium bicarbonate buffer according to a ratio of 5:2:1:1:1, heating to 150-185 ℃ at a speed of 8-10 ℃/min, heating at a constant temperature for 30min, and cooling.
8. The apparatus of claim 1, wherein the backwash system comprises: on-line control system (11), back flush water pump (12), air-blower (13), back flush pipeline (14) and back flush board (15), two back flush board (15) connect respectively in one-level reaction pond and second grade reaction pond inner wall bottom, a plurality of flushing hole has been arranged in array on back flush board (15), be provided with the check valve between back flush board (15) and the flushing hole, back flush pipeline (14) communicate in two back flush board (15) bottom to back flush pipeline (14) are worn to establish major structure (18) and are extended to major structure (18) one side, two back flush water pump (12) arrange in back flush pipeline (14), and two back flush water pump (12) are close to one-level reaction pond and second grade reaction pond respectively and arrange, air-blower (13) pass through the tube coupling in back flush pipeline (14) middle part, a back washing water inlet (10) is formed in one end of the back washing pipeline (14), the online control system (11) is connected to one end, close to the back washing water inlet (10), of the back washing pipeline (14), and the online control system (11) is electrically connected with the back washing water pump (12) and the air blower (13).
9. The diafiltration bed reactor system according to claim 1, further comprising a guard connected to the top end of the main body structure (18), the guard comprising:
the plurality of sleeves (101) are uniformly connected to the top end of the main body structure (18), a press switch (102) connected with the main body structure (18) is arranged in each sleeve (101), the press switches (102) are electrically connected with an alarm, and grooves (103) are symmetrically formed in the side end of the inner wall of each sleeve (101);
the protective plate (104) is connected to the top end of the cylinder wall of the sleeve (101) through a spring, and a sliding groove (105) is formed in the middle of the protective plate (104);
the pressing block (106) is connected into the sliding groove (105) in a limiting sliding mode, and the pressing block (106) vertically extends downwards to the interior of the sleeve (101);
one ends of the two sliding blocks (107) are symmetrically connected to the outer side of the pressing block (106), the other ends of the sliding blocks (107) extend into the grooves (103), and a plurality of first clamping teeth (108) are uniformly arranged at the extending ends of the sliding blocks (107);
the sliding plate (109) is connected to the inner wall of the groove (103) in a sliding mode, and a spring is connected between the bottom end of the sliding plate (109) and the groove (103);
the second latch (110) is uniformly connected to the inner wall of the groove (103) through a rotating shaft in the middle, the second latch (110) is arranged in a bent mode, one end of the second latch (110) is clamped with the first latch (108), and the other end of the second latch (110) is movably connected with the sliding plate (109);
the sliding button (111) is fixedly connected to one end, far away from the second latch (110), of the sliding plate (109), the sliding button (111) is in limited sliding connection with the side wall of the sleeve (101), and the sliding button (111) extends out of the sleeve (101);
the gear (112) is connected to the inner wall of the groove (103) through a rotating shaft;
the two racks (113) are connected to the inner wall of the groove (103) in a sliding mode, the two racks (113) are arranged in a centrosymmetric mode by taking a rotating shaft of the gear (112) as a center, and the two racks (113) are meshed with the gear (112) at the same time;
one ends of the two connecting rods (114) are respectively hinged to the side ends of the two racks (113), the other ends of the two connecting rods (114) are simultaneously hinged to a clamping block (115), and the clamping block (115) is adaptive to the pressing block (106).
10. The apparatus of claim 8, further comprising:
the backwashing prompting device comprises a flow meter which is electrically connected with the online control system, the flow meter is arranged in the backwashing pipeline (14) and is used for monitoring the real-time flow of backwashing water, the backwashing prompting device is used for monitoring the impact force condition of the backwashing water on the packing layer in real time, the impact force of the backwashing water on the packing layer is calculated according to a preset algorithm, whether the water inflow of the backwashing water pump (12) is adjusted or not is determined according to the calculation result, and the specific steps of the preset algorithm are as follows:
step A1, solving and obtaining the hitting power of the backwashing water on the packing layer according to the following formula:
f is the impact force of the back washing water on the packing layer obtained through solving, q is the real-time flow of the back washing water, the real-time flow is obtained through detection of the flow meter, mu is the flow coefficient of a nozzle of the flushing hole, and d is the diameter of the outlet section of the nozzle of the flushing hole;
step A2, according to the impact force F of the backwashing water obtained in step A1 on the packing layer, when the impact force F of the backwashing water on the packing layer reaches the upper limit value F of the preset impact force0When the impact force of the backwashing water on the packing layer is not reached to a preset impact force upper limit value F, the online control system adjusts the water inflow of the backwashing water pump (12), namely the impact force of the packing layer is too large, and when the impact force F of the backwashing water on the packing layer is not reached to the preset impact force upper limit value F0No adjustment is required at this time.
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| CN114307591A (en) * | 2021-12-30 | 2022-04-12 | 南京科盛环保技术有限公司 | Process and device for deep denitrification of petrochemical wastewater |
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