CN209872528U - Two-stage series porous filler denitrification deep bed filter system - Google Patents
Two-stage series porous filler denitrification deep bed filter system Download PDFInfo
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- CN209872528U CN209872528U CN201920372187.6U CN201920372187U CN209872528U CN 209872528 U CN209872528 U CN 209872528U CN 201920372187 U CN201920372187 U CN 201920372187U CN 209872528 U CN209872528 U CN 209872528U
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Abstract
The embodiment of the utility model discloses a two-stage series porous filler denitrification deep bed filter system, which comprises a first-stage denitrification deep bed filter, a second-stage denitrification deep bed filter, a clean water tank and a carbon source adding control system; the water inlet at the top of the second-stage denitrification deep-bed filter is connected with the water outlet at the bottom of the first-stage denitrification deep-bed filter through the water outlet channel of the first-stage denitrification deep-bed filter, and the water inlet of the clean water tank is connected with the water outlet at the bottom of the second-stage denitrification deep-bed filter through the water outlet channel of the second-stage denitrification deep-bed filter; the carbon source adding control system comprises a flowmeter, a nitronitrogen concentration detector, a dissolved oxygen concentration monitor, a carbon source adding point and a control system. The two-stage series porous filler denitrification deep bed filter system improves the concentration and the strength of a microbial film of a filler layer of a denitrification system, enhances the denitrification capability, improves the denitrification stability, fully utilizes the added carbon source and realizes the multi-index stable standard of the outlet water.
Description
Technical Field
The utility model relates to an industrial sewage treatment technical field especially relates to a two-stage series connection porous filler denitrification deep bed filtering pond system.
Background
The existing sewage treatment denitrification technology adopts a first-level denitrification deep bed filter system, single-layer coarse-grain quartz sand is installed as a filler for filtration and microbial adsorption growth, the specific surface area of the coarse-grain quartz sand is small, microbial film growth and enrichment are not facilitated, the concentration of the microbial film is low, the surface of the coarse-grain quartz sand is smooth and has no pores or folds, the microbial film is attached to and grows on the surface of the quartz sand, the attachment strength is low, the microbial film is easy to drop off in a large amount in the air-water backwashing process, the concentration of the microbial film in the filler layer is greatly reduced, the denitrification effect is influenced, the carbon source cannot be fully utilized, and the effluent quality exceeds the standard.
The denitrification capability of the primary denitrification deep bed filter tank system is limited by the concentration of the microbial film, the denitrification capability is limited, the microbial film is lost due to gas-water back flushing, the total nitrogen concentration fluctuation of effluent is caused, the stability of the effluent quality is influenced, and the carbon source breakdown is caused by the fact that the microbial film cannot fully utilize the added carbon source due to the low microbial film concentration, and the effluent quality is influenced.
The total amount of the microbial film in the filler layer can be increased by increasing the thickness of the single-layer quartz sand filler layer, but the adhesive capacity of the microbial film cannot be enhanced, the problems of low concentration and low adhesive capacity of the microbial film cannot be fundamentally solved, the denitrification capability and the utilization rate of a carbon source are low, and the fluctuation of the effluent quality still exists.
The existing carbon source adding control technology collects water quality and flow signals of inlet water to control carbon source adding, and does not consider carbon source utilization rate and denitrification capability when the concentration of a microbial film changes, so that carbon source breakdown is often caused, and the water quality of outlet water is influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a technical problem that will solve lies in, adopts one-level denitrification deep bed filtering pond system to current sewage treatment denitrification denitrogenation technique, and it is low to have microorganism concentration, and the microbial film adhesive force is poor, and whole denitrification denitrogenation ability is poor, and the carbon source is thrown and is thrown the utilization ratio and hang down, goes out the undulant problem of water quality, has provided a two-stage series connection porous filler denitrification deep bed filtering pond system.
In order to solve the technical problem, the embodiment of the utility model provides a porous denitrification deep bed filter system of packing is established ties to two-stage, this porous denitrification deep bed filter system of packing of two-stage series connection includes: the system comprises a first-stage denitrification deep-bed filter, a second-stage denitrification deep-bed filter, a clean water tank and a carbon source adding control system;
a porous packing layer is arranged in the middle of the first-stage denitrification deep-bed filter tank, a water inlet at the top of the second-stage denitrification deep-bed filter tank is connected with a water outlet at the bottom of the first-stage denitrification deep-bed filter tank through a first-stage denitrification deep-bed filter tank water outlet channel, a quartz sand packing layer is arranged in the middle of the second-stage denitrification deep-bed filter tank, a water inlet of a clean water tank is connected with a water outlet at the bottom of the second-stage denitrification deep-bed filter tank through a second-stage denitrification deep-bed filter tank water outlet channel, a backwashing water pump is arranged in the clean water tank, the backwashing water pump is respectively communicated with the bottoms of the first-stage denitrification deep-bed filter tank and the second-stage denitrification deep-bed filter tank through water pipes, and a backwashing fan is respectively communicated with the bottoms of the;
the carbon source adding control system comprises a flow meter, a nitronitrogen concentration detector, a dissolved oxygen concentration monitor, carbon source adding points and a control system, wherein 3 nitronitrogen concentration detectors are arranged, 2 carbon source adding points are arranged, the flow meter is arranged, the nitronitrogen concentration detector, the dissolved oxygen concentration monitor is installed in proper order on the inlet channel of first order denitrification deep bed filtering pond, be provided with the carbon source on the inlet channel of the one side that the nitronitrogen concentration detector was kept away from to the dissolved oxygen concentration monitor and throw with the point, it does not install nitronitrogen concentration detector on first order denitrification deep bed filtering pond outlet channel and the second level denitrification deep bed filtering pond outlet channel equally divide, one of first order denitrification deep bed filtering pond outlet channel is close to the second level denitrification deep bed filtering pond is served and is provided with the carbon source and throw with the point, control system respectively with the flowmeter, nitronitrogen concentration detector, dissolved oxygen concentration monitor and carbon source throw with some signal connection.
Wherein, the middle part in the second-stage denitrification deep bed filter tank is provided with a single-layer or double-layer quartz sand filler layer.
Wherein, the back flush fan is arranged outside the first-stage denitrification deep-bed filter tank and the second-stage denitrification deep-bed filter tank.
The model of the flowmeter is FT, the model of the nitronitrogen concentration detector is AIT-N, the model of the dissolved oxygen concentration detector is AIT-DO, and the model of the control system is PLC-SN.
Implement the embodiment of the utility model provides a, following beneficial effect has: the two-stage series porous filler denitrification deep bed filter system improves the concentration and the strength of a microbial film of a filler layer of a denitrification system, enhances the denitrification capability, improves the denitrification stability, fully utilizes the added carbon source and realizes the multi-index stable standard of the outlet water.
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a two-stage series porous filler denitrification deep bed filter system provided by the present invention;
FIG. 2 is a configuration diagram of a two-point accurate carbon source adding control technique provided by the present invention;
FIG. 3 is a schematic diagram of the control of two-point accurate addition of carbon source.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The two-stage series porous filler denitrification deep bed filter system comprises: the device comprises a first-stage denitrification deep-bed filter 1, a second-stage denitrification deep-bed filter 2, a porous packing layer 3, a first-stage denitrification deep-bed filter water outlet channel 4, a quartz sand packing layer 5, a clean water tank 6, a backwashing water pump 7, a backwashing fan 8, a flow meter 9, a nitro-nitrogen concentration detector 10, a dissolved oxygen concentration detector 11, a carbon source feeding point 12, a control system 13, a second-stage denitrification deep-bed filter water outlet channel 14, a water pipe 15, a pipeline 16 and a water inlet channel 17.
Please refer to fig. 1, fig. 1 is a schematic structural diagram of a two-stage series porous filler denitrification deep bed filter system provided by the present invention. A porous packing layer 3 is arranged in the middle of the first-stage denitrification deep-bed filter 1, a water inlet at the top of the second-stage denitrification deep-bed filter 2 is connected with a water outlet at the bottom of the first-stage denitrification deep-bed filter 1 through a water outlet channel 4 of the first-stage denitrification deep-bed filter, a quartz sand packing layer 5 is arranged in the middle of the second-stage denitrification deep-bed filter 2, and the quartz sand packing layer 5 is a single-layer or double-layer quartz sand packing layer.
The water inlet of the clean water tank 6 is connected with the water outlet at the bottom of the second-stage denitrification deep-bed filter 2 through a second-stage denitrification deep-bed filter outlet channel 14, a backwash water pump 7 is installed in the clean water tank 6, and the backwash water pump 7 is respectively communicated with the bottoms of the first-stage denitrification deep-bed filter 1 and the second-stage denitrification deep-bed filter 2 through a water pipe 15. The back flush fan 8 is arranged outside the first-stage denitrification deep-bed filter 1 and the second-stage denitrification deep-bed filter 2 and is respectively communicated with the bottoms of the first-stage denitrification deep-bed filter 1 and the second-stage denitrification deep-bed filter 2 through a pipeline 16.
Referring to fig. 2 and fig. 3, fig. 2 is a configuration diagram of a two-point precise carbon source adding control technique provided by the present invention; FIG. 3 is a schematic diagram of the control of two-point accurate addition of carbon source. The carbon source adding control system comprises a flowmeter 9 (model: FT), a nitronitrogen concentration detector 10 (model: AIT-N), a dissolved oxygen concentration monitor 11 (model: AIT-DO), carbon source adding points 12 and a control system 13 (model: PLC-SN), wherein the number of the nitronitrogen concentration detector 10 is 3, and the number of the carbon source adding points is 2.
The flow meter 9, the nitro-nitrogen concentration detector 10 and the dissolved oxygen concentration monitor 11 are sequentially arranged on an inlet channel 17 of the first-stage denitrification deep-bed filter 1, a carbon source adding point 12 is arranged on the inlet channel 17 of one side of the dissolved oxygen concentration monitor 11 far away from the nitro-nitrogen concentration detector 10, the nitro-nitrogen concentration detector 10 is respectively arranged on an outlet channel 4 of the first-stage denitrification deep-bed filter and an outlet channel 14 of the second-stage denitrification deep-bed filter, the carbon source adding point 12 is arranged at one end of the outlet channel 4 of the first-stage denitrification deep-bed filter, which is close to the second-stage denitrification deep-bed filter 2, and the control system 13 is respectively in signal connection with the flow meter 9, the nitro-nitrogen concentration detector 10, the dissolved oxygen concentration monitor 11 and the carbon source adding point 12.
The two-stage series connection porous filler denitrification deep bed filter system adopts two-stage denitrification deep bed filters to be used in series, a porous filler layer is arranged on a first-stage denitrification deep bed filter, a water outlet channel of the first-stage denitrification deep bed filter is used as a water inlet channel of a second-stage denitrification deep bed filter, single-layer quartz sand filler or double-layer filler is arranged on the second-stage denitrification deep bed filter, a clear water tank is arranged in the water outlet of the second-stage denitrification deep bed filter to provide backwash water for the two-stage denitrification deep bed filter, and the two-stage denitrification deep bed filter shares a backwash water pump and a backwash fan.
The first-stage denitrification deep-bed filter is provided with a porous filler layer, such as ceramsite, the surface of the filler layer is rough, the pores are numerous, the specific surface area of the filler layer is huge, microbial films are enriched and grown on the surface of the filler layer or in the pores, and the concentration of the microbial films is very high; the air-water back flushing can only clean the aged microbial membrane on the surface layer, the microbial membrane in the filler pores and with strong adhesion capability is still retained in the filler layer, the concentration of the microbial membrane is guaranteed, and the denitrification capability is stable and efficient.
The second-stage denitrification deep-bed filter is provided with a single-layer or double-layer quartz sand filler layer for taking security measures for denitrification, and when the front-end first-stage denitrification deep-bed filter fails to achieve the denitrification effect, the auxiliary denitrification capability of the second-stage denitrification deep-bed filter is used as supplement to achieve the denitrification goal; the lower layer of the single-layer filler or the double-layer filler is made of quartz sand, and is used for ensuring the filtering capacity of the denitrification deep bed filter and ensuring the multi-index single-meter of the effluent quality.
A flow meter, a nitro-nitrogen concentration detector and a dissolved oxygen concentration detector are arranged on a water inlet channel of the first-stage denitrification deep-bed filter, nitro-nitrogen concentration detectors are respectively arranged on water outlet channels of the first-stage denitrification deep-bed filter and the second-stage denitrification deep-bed filter, and a carbon source adding point is arranged on water inlet channels of the first-stage denitrification deep-bed filter and the second-stage denitrification deep-bed filter. The control system collects a water inlet flow signal, a water inlet nitro-nitrogen and dissolved oxygen concentration signal and a water outlet nitro-nitrogen concentration signal of the first-stage denitrification deep bed filter, and controls the accurate addition of a carbon source at a carbon source adding point on a water inlet channel of the first-stage denitrification deep bed filter in a feedforward and feedback control mode; the control system collects the output nitro nitrogen concentration signal of the second-stage denitrification deep-bed filter, and controls the accurate adding of the carbon source at the carbon source adding point of the second-stage denitrification deep-bed filter outlet channel by adopting a feedback control mode. The set values of the nitro-nitrogen concentration of the effluent of the first-stage denitrification deep-bed filter tank and the second-stage denitrification deep-bed filter tank can be set or adjusted through the control system, and the denitrification capability of the first-stage denitrification deep-bed filter tank and the second-stage denitrification deep-bed filter tank can be effectively adjusted.
The two-stage series porous filler denitrification deep bed filter system adopts the two-stage denitrification deep bed filter, the porous fillers are installed, a carbon source two-point accurate adding technology is adopted, the microbial film concentration and the adhesion strength of the filler layer are increased, the denitrification capability and the carbon source utilization rate are improved, and the problem of effluent quality fluctuation is effectively solved.
Implement the embodiment of the utility model provides a, following beneficial effect has: the two-stage series porous filler denitrification deep bed filter system improves the concentration and the strength of a microbial film of a filler layer of a denitrification system, enhances the denitrification capability, improves the denitrification stability, fully utilizes the added carbon source and realizes the multi-index stable standard of the outlet water.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The two-stage series connection porous filler denitrification deep bed filter system is characterized by comprising: the system comprises a first-stage denitrification deep-bed filter, a second-stage denitrification deep-bed filter, a clean water tank and a carbon source adding control system;
a multi-pore packing layer is arranged in the middle of the first-stage denitrification deep bed filter tank, a water inlet at the top of the second-stage denitrification deep bed filter tank is connected with a water outlet at the bottom of the first-stage denitrification deep bed filter tank through a first-stage denitrification deep bed filter tank water outlet channel, a quartz sand packing layer is arranged in the middle of the second-stage denitrification deep bed filter tank, a water inlet of the clean water tank is connected with a water outlet at the bottom of the second-stage denitrification deep bed filter tank through a second-stage denitrification deep bed filter tank water outlet channel, a backwashing water pump is arranged in the clean water tank, the backwashing water pump is respectively communicated with the bottoms of the first-stage denitrification deep bed filter tank and the second-stage denitrification deep bed filter tank through a water pipe, and a backwashing fan is respectively communicated with the bottoms of the first-stage denitrification deep bed filter tank and the second-stage denitrification deep bed filter tank;
the carbon source adding control system comprises a flow meter, a nitronitrogen concentration detector, a dissolved oxygen concentration monitor, a carbon source adding point and a control system, wherein the nitronitrogen concentration detector is provided with 3 carbon sources, the carbon source adding point is provided with 2 carbon sources, the flow meter, the nitronitrogen concentration detector, the dissolved oxygen concentration monitor is sequentially installed on an inlet channel of the first-stage denitrification deep-bed filter, the dissolved oxygen concentration monitor is far away from the inlet channel of one side of the nitronitrogen concentration detector, the carbon source adding point is arranged on the inlet channel, the first-stage denitrification deep-bed filter outlet channel and the second-stage denitrification deep-bed filter outlet channel are respectively installed with the nitronitrogen concentration detector, the first-stage denitrification deep-bed filter outlet channel is close to one end of the second-stage denitrification deep-bed filter and is provided with the carbon source adding point, the control system is respectively in signal connection with the flowmeter, the nitro nitrogen concentration detector, the dissolved oxygen concentration monitor and the carbon source feeding point.
2. The two-stage series porous filler denitrification deep-bed filter system according to claim 1, characterized in that a single-layer or double-layer quartz sand filler layer is arranged in the middle of the second-stage denitrification deep-bed filter.
3. The two-stage series porous filler denitrification deep-bed filter system according to claim 1, wherein the back-flushing fan is installed outside the first-stage denitrification deep-bed filter and the second-stage denitrification deep-bed filter.
4. The two-stage series porous filler denitrification deep bed filter system according to claim 1, wherein the type of the flow meter is FT, the type of the nitro nitrogen concentration detector is AIT-N, the type of the dissolved oxygen concentration monitor is AIT-DO, and the type of the control system is PLC-SN.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117003385A (en) * | 2023-09-25 | 2023-11-07 | 南京正元环境工程有限公司 | Fluidized bed for sewage denitration and fluidization treatment method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117003385A (en) * | 2023-09-25 | 2023-11-07 | 南京正元环境工程有限公司 | Fluidized bed for sewage denitration and fluidization treatment method thereof |
| CN117003385B (en) * | 2023-09-25 | 2023-12-26 | 南京正元环境工程有限公司 | Fluidized bed for sewage denitration and fluidization treatment method thereof |
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