CN212076758U - Deep bed filter device for biological nitrogen and phosphorus removal - Google Patents
Deep bed filter device for biological nitrogen and phosphorus removal Download PDFInfo
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- CN212076758U CN212076758U CN202020397017.6U CN202020397017U CN212076758U CN 212076758 U CN212076758 U CN 212076758U CN 202020397017 U CN202020397017 U CN 202020397017U CN 212076758 U CN212076758 U CN 212076758U
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- filtering pond
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Abstract
The utility model discloses a deep bed filtering pond device for biological nitrogen and phosphorus removal mainly is applied to sewage treatment technical field, contains coagulation tank, deep bed filtering pond, clean water basin, waste liquid collecting pit, coagulation tank one side is connected with inlet tube, organic carbon source pipe, and communicates through pipeline and deep bed filtering pond, the filter material layer, support layer, air water distribution filter brick are laid in proper order to deep bed filtering pond bottom from top to bottom, clean water basin passes through outlet pipe and deep bed filtering pond bottom intercommunication, the outlet pipe communicates the backwash water pipe in addition, be equipped with PLC control system on the backwash water pipe, the waste liquid collecting pit passes through pipeline and deep bed filtering pond top intercommunication. Use the utility model relates to a deep bed filtering pond device for biological nitrogen and phosphorus removal can reduce total phosphorus, the suspended solid content of water in the denitrogenation, has simple process, low, easy and simple to handle, the effectual characteristics of denitrogenation of working costs simultaneously.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, concretely relates to deep bed filtering pond device for biological nitrogen and phosphorus removal.
Background
Water is one of important ecological environment elements as an indispensable natural resource for normal production and life of human beings. When the water body is eutrophicated, the human health is harmed, and the sustainable development of the social economy is hindered.
Nitrogen and phosphorus are one of the main reasons for causing eutrophication of water bodies, and the sources of nitrogen in the water bodies comprise metabolism and putrefaction of organisms, discharge of industrial wastewater and domestic sewage, loss of nitrogen fertilizers and the like. In order to effectively improve the eutrophication of water bodies, it is very necessary to develop an economical, efficient and environment-friendly denitrification process.
The method for removing nitrogen and phosphorus from the water body can be divided into a physical method, a chemical method and a biological method, wherein the physical method only transfers pollution and does not really eliminate the pollution; the chemical method needs to input a catalyst, so that the cost is high and secondary pollution is possibly caused; the biological method mainly utilizes microorganisms to remove nitrogen and phosphorus in water and has the characteristics of high benefit, low cost, flexible operation and the like.
Although the biological method has become the mainstream method for nitrogen and phosphorus removal of water, the existing biological nitrogen and phosphorus removal device still has the problems of unreasonable organic carbon source addition and difficult cleaning, so that the operation cost of the device is high and the effluent quality is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a deep bed filter device for biological nitrogen and phosphorus removal to the defect that current biological nitrogen and phosphorus removal device exists, has simple process, low running cost, easy and simple to handle, the effectual characteristics of denitrogenation.
The technical scheme of the utility model is that: the utility model provides a deep bed filtering pond device for biological nitrogen and phosphorus removal, includes coagulating basin, deep bed filtering pond, clean water basin, waste liquid collecting pit, coagulating basin one side is connected with inlet tube, organic carbon source pipe, and communicates through pipeline and deep bed filtering pond, filter material layer, bearing layer, air water distribution filter brick are laid in proper order to deep bed filtering pond bottom, the clean water basin passes through outlet pipe and deep bed filtering pond bottom intercommunication, the outlet pipe is opening intercommunication backwash water pipe in addition, be equipped with PLC control system on the backwash water pipe, the waste liquid collecting pit passes through pipeline and deep bed filtering pond top intercommunication.
Preferably, the water inlet pipe of the filter tank is provided with a water inlet flow meter, a nitrate nitrogen analyzer and a dissolved oxygen analyzer.
Preferably, a carbon source adding system is arranged on the organic carbon source pipe.
Preferably, a coagulation mixer is arranged in the coagulation pool.
Preferably, the top of the deep bed filter is provided with an ultrasonic liquid level meter.
Preferably, the filter material layer (22) is composed of high-grade silica sand with the silicon content of more than 95%, the particle size of the silica sand is 2-4mm, and the supporting layer (23) is composed of natural cobblestones, and the particle size of the cobblestones is 6-19 mm.
Preferably, the air-water distribution filter brick is made of high-density polyethylene, and the cross section of the air-water distribution filter brick consists of a central primary distribution cavity and two secondary compensation cavities on two sides.
Preferably, the bottom of the air-water distribution filter brick is communicated with an air blower through a pipeline, and a PLC control system is arranged on the pipeline.
Preferably, a back washing water pump is arranged in the clean water tank and is communicated with the back washing water pipe.
Preferably, a waste liquid discharge pump is arranged in the waste liquid collecting tank.
The utility model has the advantages that: a deep bed filter device for biological nitrogen and phosphorus removal adopts a unique deep bed filtration treatment process, and has the following advantages:
1. the carbon source adding system can accurately add the carbon source, thereby saving the operation cost and ensuring good denitrification effect.
2. The deep bed filter tank operates at a constant water level, the increase of dissolved oxygen in the inlet water is controlled to be at a lower level, and the adding cost of the carbon source is saved.
3. The filter material layer is combined with the supporting layer, so that the total content of phosphorus and suspended solid in the water body can be further reduced while denitrification is performed.
4. The air-water distribution filter brick has a double-layer water distribution structure, can realize the uniform distribution of backflushing gas and water, and eliminates water and gas distribution blind areas.
5. Simple process, low operation cost and simple operation.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the gas-water distribution filter brick of the present invention;
in the figure, 10-a coagulation tank, 11-a water inlet pipe, 12-a water inlet flow meter, 13-an organic carbon source pipe, 14-a carbon source adding system, 15-a coagulation mixer, 16-a nitrate nitrogen analyzer, 17-a dissolved oxygen analyzer, 20-a deep bed filter, 21-an ultrasonic liquid level meter, 22-a filter material layer, 23-a supporting layer, 24-an air water distribution filter brick, 241-a primary distribution cavity, 242-a secondary compensation cavity, 25-an air blower, 30-a clear water tank, 31-a water outlet pipe, 32-a backwashing water pipe, 33-a PLC control system, 34-a backwashing water pump, 40-a waste liquid collecting tank and 41-a waste liquid discharge pump.
Detailed Description
The utility model discloses a concrete implementation way does: as shown in fig. 1 and 2, a deep-bed filter device for biological nitrogen and phosphorus removal comprises a coagulation tank 10, a deep-bed filter 20, a clean water tank 30 and a waste liquid collecting tank 40, wherein one side of the coagulation tank 10 is connected with a water inlet pipe 11 and an organic carbon source pipe 13 and is communicated with the deep-bed filter 20 through a pipeline, a filter material layer 22, a supporting layer 23 and an air-water distribution filter brick 24 are sequentially laid at the bottom of the deep-bed filter 20, the clean water tank 30 is communicated with the bottom of the deep-bed filter 20 through a water outlet pipe 31, the other opening of the water outlet pipe 31 is communicated with a backwashing water pipe 32, a PLC control system 33 is arranged on the backwashing water pipe 32, and the waste liquid collecting tank 40 is communicated with the top of the deep-bed.
Specifically, the water inlet pipe 11 is provided with a water inlet flow meter 12, a nitrate nitrogen analyzer 16 and a dissolved oxygen analyzer 17, which are respectively used for detecting the flow rate of inlet water, the nitrate nitrogen concentration and the dissolved oxygen concentration.
Specifically, the organic carbon source pipe 13 is provided with a carbon source adding system 14, and the adding amount of the organic carbon source can be accurately adjusted according to the flow rate of inlet water, the nitrogen concentration of nitrate and the dissolved oxygen concentration, so that the operation cost can be saved, and the good denitrification effect can be ensured.
Specifically, a coagulation mixer 15 is arranged in the coagulation tank 10 to ensure that the organic carbon source and the inlet water are fully and uniformly mixed.
Specifically, the top of the deep bed filter 20 is provided with an ultrasonic level meter 21 for detecting the real-time water level of the deep bed filter 20, so that the water inflow rate can be adjusted in time to keep the liquid level of the deep bed filter 20 constant, the increase of the dissolved oxygen in the inflow water is maintained at a lower level, and the carbon source adding cost is saved.
Specifically, the filter material layer 22 is composed of high-grade silica sand with the silicon content of more than 95%, the particle size of the silica sand is 2-4mm, and the silica sand is used as a film forming medium for denitrifying microorganisms, so that the contact area between the microorganisms and inlet water is increased; the supporting layer 23 is made of natural cobblestones, the particle size of the cobblestones is 6-19mm, suspended matters and micro flocculates in water can be intercepted, and the phenomenon of cross flow or penetration of a filter bed can be avoided.
Specifically, the air-water distribution filter brick 24 is made of high-density polyethylene, the cross section of the air-water distribution filter brick is composed of a central primary distribution cavity 241 and two-stage compensation cavities 242 on two sides, and reverse compensation is generated in the two-stage compensation cavities according to pressure difference through backwashing water or air of the primary distribution cavity, so that air-water uniform distribution of the filter brick is realized, and water and air distribution blind areas are eliminated.
Specifically, the bottom of the air-water distribution filter brick 24 is communicated with a blower 25 through a pipeline for providing backwashing gas.
Specifically, a back washing water pump 34 is arranged in the clean water tank 30, and the back washing water pump 34 is communicated with the back washing water pipe 32 and used for pumping out part of the clean water in the clean water tank 30 as back washing water.
Specifically, a waste liquid discharge pump 41 is disposed in the waste liquid collecting tank 40, and is used for conveying the waste water in the waste liquid collecting tank 40 to the front-end processing system.
The utility model discloses a use method: feeding inlet water and a proper amount of organic carbon source into a coagulation tank 10, fully and uniformly stirring, and then feeding into a deep bed filter 20; under the action of an organic carbon source, the denitrifying bacteria attached to the surface of the filter material layer 22 convert nitrate nitrogen in the inlet water into nitrogen to complete denitrification reaction, and the phosphorus accumulating bacteria absorb phosphorus in the inlet water to form micro flocculate; subsequently, the supporting layer 23 can intercept suspended matters and micro flocculates in the water, and further reduce total phosphorus and solid suspended matters of the inlet water; the obtained clean water is collected into the clean water tank 30 through the water outlet pipe 31.
Nitrogen is generated in the denitrification process, and a small amount of gas can increase the contact of microorganisms and water flow, so that the filtering efficiency is improved; however, when too many nitrogen bubbles accumulate in the deep bed filter 20, head loss occurs. Aiming at the problems, the PLC control system 35 on the backwashing pipe 32 can automatically calculate the nitrogen release period according to the flow of the inlet water, the nitrate nitrogen concentration and the dissolved oxygen concentration, further control the periodic start and stop of the backwashing water pump 34, and release the nitrogen accumulated in the deep-bed filter 20 to the atmosphere through the backwashing water, thereby ensuring the normal operation of the deep-bed filter 20.
As the intercepted solid suspended matter and micro-floc are accumulated, the supporting layer 23 is blocked to cause head loss, so that the deep bed filter 20 needs to be backwashed regularly. After the filtering period is finished, the air blower 25 and the backwashing water pump 34 are started, backwashing gas and backwashing water enter the deep-bed filter 20 from the bottom through the gas-water distribution filter bricks 24, so that the mutual friction between the filter material layer 22 and the bearing layer 23 can be increased, and intercepted solid suspended matters and micro flocculates are all carried out to the upper layer of the deep-bed filter 20; the waste liquid in the upper layer flows to the waste liquid collecting tank 40 through a pipeline.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a deep bed filtering pond device for biological nitrogen and phosphorus removal, includes coagulating basin (10), deep bed filtering pond (20), clean water basin (30), waste liquid collecting pit (40), coagulating basin (10) one side is connected with inlet tube (11), organic carbon source pipe (13), and communicates through pipeline and deep bed filtering pond (20), filter material layer (22), supporting layer (23), air water distribution filter brick (24) are laid in proper order to deep bed filtering pond (20) bottom from top to bottom, clean water basin (30) are through outlet pipe (31) and deep bed filtering pond (20) bottom intercommunication, outlet pipe (31) opening intercommunication backwash water pipe (32) in addition, be equipped with PLC control system (33) on backwash water pipe (32), waste liquid collecting pit (40) are through pipeline and deep bed filtering pond (20) top intercommunication.
2. The deep bed filter apparatus for biological nitrogen and phosphorus removal according to claim 1, wherein: the water inlet pipe (11) is provided with a water inlet flow meter (12), a nitrate nitrogen analyzer (16) and a dissolved oxygen analyzer (17).
3. The deep bed filter apparatus for biological nitrogen and phosphorus removal according to claim 1, wherein: and a carbon source adding system (14) is arranged on the organic carbon source pipe (13).
4. The deep bed filter apparatus for biological nitrogen and phosphorus removal according to claim 1, wherein: a coagulation mixer (15) is arranged in the coagulation tank (10).
5. The deep bed filter apparatus for biological nitrogen and phosphorus removal according to claim 1, wherein: the top of the deep bed filter (20) is provided with an ultrasonic liquid level meter (21).
6. The deep-bed filter apparatus for biological nitrogen and phosphorus removal according to claim 1, wherein: the filter material layer (22) is composed of high-grade silica sand with the silicon content of more than 95%, the particle size of the silica sand is 2-4mm, the supporting layer (23) is composed of natural cobblestones, and the particle size of the cobblestones is 6-19 mm.
7. The deep bed filter apparatus for biological nitrogen and phosphorus removal according to claim 1, wherein: the air-water distribution filter brick (24) is made of high-density polyethylene, and the section of the air-water distribution filter brick consists of a central primary distribution cavity (241) and two secondary compensation cavities (242) on two sides.
8. The deep bed filter apparatus for biological nitrogen and phosphorus removal according to claim 7, wherein: the bottom of the air-water distribution filter brick (24) is communicated with an air blower (25) through a pipeline.
9. The deep bed filter apparatus for biological nitrogen and phosphorus removal according to claim 1, wherein: a back washing water pump (34) is arranged in the clean water tank (30), and the back washing water pump (34) is communicated with the back washing water pipe (32).
10. The deep bed filter apparatus for biological nitrogen and phosphorus removal according to claim 1, wherein: and a waste liquid discharge pump (41) is arranged in the waste liquid collecting tank (40).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020397017.6U CN212076758U (en) | 2020-03-25 | 2020-03-25 | Deep bed filter device for biological nitrogen and phosphorus removal |
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| CN202020397017.6U CN212076758U (en) | 2020-03-25 | 2020-03-25 | Deep bed filter device for biological nitrogen and phosphorus removal |
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| CN212076758U true CN212076758U (en) | 2020-12-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112919738A (en) * | 2021-01-28 | 2021-06-08 | 安徽拓水环境工程科技有限公司 | Assembly type deep bed filter system and working method thereof |
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- 2020-03-25 CN CN202020397017.6U patent/CN212076758U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112919738A (en) * | 2021-01-28 | 2021-06-08 | 安徽拓水环境工程科技有限公司 | Assembly type deep bed filter system and working method thereof |
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