CN214299633U - Backwashing wastewater treatment device for denitrification deep bed filter - Google Patents
Backwashing wastewater treatment device for denitrification deep bed filter Download PDFInfo
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- CN214299633U CN214299633U CN202120162991.9U CN202120162991U CN214299633U CN 214299633 U CN214299633 U CN 214299633U CN 202120162991 U CN202120162991 U CN 202120162991U CN 214299633 U CN214299633 U CN 214299633U
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Abstract
The utility model discloses a deep bed filtering pond backwash effluent treatment plant of denitrification, hold back to middle elevator pump room through the backwash waste water with the deep bed filtering pond of denitrification, and throw with chemical agent and get rid of total phosphorus and suspended solid in the intake coagulation district of high-efficient sedimentation tank and the flocculation district of intaking, through handling on the spot in high-efficient sedimentation tank, thereby alleviateed sewage treatment plant's the load of intaking, the treatment of sewage treatment plant biochemical system to the backward flow water has been reduced, the dilution of backward flow to sewage treatment plant's water intake has been avoided, reach the purpose to backwash waste water treatment simultaneously.
Description
Technical Field
The utility model relates to a sewage treatment device, in particular to a backwashing wastewater treatment device of a denitrification deep bed filter.
Background
In recent years, the national treatment of environmental pollution and the energy conservation and emission reduction are gradually paid attention to, the emission standard of a municipal sewage treatment plant is improved from (GB18918-2002) primary B to primary A, so that a plurality of advanced sewage treatment processes are carried forward, a common treatment process is a denitrification deep-bed filter, the main function of the deep-bed filter is to further remove pollutants such as Total Nitrogen (TN), Suspended Solids (SS), Total Phosphorus (TP) and the like in water from a high-efficiency sedimentation tank by adding a carbon source according to the actual operation condition, but when the deep-bed filter runs, the blockage of filter bricks and a filter material layer is easy to occur, particularly, the turbidity of effluent increases, the head loss increases, the flux capacity of the effluent decreases, and the backwash is required to be performed regularly; the wastewater after back flushing flows into a wastewater tank, is conveyed to the front of a coarse grid of a factory pretreatment unit after being guided and lifted by a wastewater pump, and enters a sewage treatment system again, so that the water inlet load is increased; particularly, when the backflow wastewater flows back at the right time of the incoming water peak, the peak liquid level of the water inlet pump room is easy to have a bad superposition effect, and the overflow phenomenon of a sewage pipeline in a plant is easy to cause; in addition, the COD value of the backflow water is lower, and the concentration of the nutrient source in the biological section is lower after the backflow water is diluted, so that the biochemical reaction process is not facilitated.
Therefore, it is necessary to the scientific and reasonable treatment of the backwash wastewater of the denitrification deep bed filter, and a device and a treatment process for treating the backwash wastewater of the denitrification deep bed filter need to be researched urgently, so that the operation period load of the denitrification deep bed filter can be reduced, the treatment of the sewage treatment plant on the return water is reduced, the dilution of the return water on the inlet water of the biochemical system of the sewage treatment plant is avoided, and the purpose of treating the backwash wastewater is achieved.
SUMMERY OF THE UTILITY MODEL
The defect that exists in the flow to prior art, the utility model aims at providing a deep bed filtering pond backwash wastewater treatment device of denitrification, hold back to middle elevator pump room through the backwash wastewater with the deep bed filtering pond of denitrification to handle on the spot through high-efficient sedimentation tank, thereby alleviateed the operation cycle load in the deep bed filtering pond of denitrification, reduced the processing of sewage treatment plant biochemical system to the backward flow water, avoided the dilution of backward flow water to sewage treatment plant biochemical system intake, reach the purpose to backwash wastewater treatment simultaneously.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a backwashing wastewater treatment device of a denitrification deep bed filter, which comprises a filter wastewater pool, a middle lift pump room and a high-efficiency sedimentation tank which are connected in sequence;
the filter tank wastewater tank is arranged at the front section of a water inlet coarse grid well of a sewage treatment plant and is connected with the water inlet coarse grid well through a first carbon steel pipeline; a wastewater submersible pump is arranged in the wastewater tank of the filter tank;
the middle lifting pump room is arranged between the filter tank wastewater pool and the water inlet coarse grid and is connected with the first carbon steel pipeline through a second carbon steel pipeline; the middle lifting pump room is provided with a lifting pump;
the high-efficiency sedimentation tank is connected with the middle lifting pump room through a third carbon steel pipeline; the water inlet end of the high-efficiency sedimentation tank is sequentially provided with a water inlet coagulation area and a water inlet flocculation area, the upper part of the high-efficiency sedimentation tank is provided with a water outlet end, and the bottom of the high-efficiency sedimentation tank is provided with a sedimentation outlet; the water inlet coagulation area is provided with a first dosing system, and the water inlet flocculation area is provided with a second dosing system.
Preferably, the intermediate lift pump house is located adjacent to the filter wastewater basin.
Preferably, valves are arranged on the first carbon steel pipeline and the second carbon steel pipeline;
the valve on the first carbon steel pipeline is arranged between the water inlet pipeline of the water inlet coarse grid well and the second carbon steel pipeline.
Preferably, the length of the second carbon steel pipeline is 20 +/-1 m.
The utility model has the advantages that:
1. the utility model discloses a backwash wastewater treatment device of a denitrification deep bed filter, which is characterized in that backwash wastewater of the denitrification deep bed filter is intercepted to a middle lifting pump room, transferred to a high-efficiency sedimentation tank for dephosphorization and suspended matter sedimentation, and treated on site in the high-efficiency sedimentation tank, thereby reducing the operation period load of the denitrification deep bed filter, reducing the treatment of a biochemical system of a sewage treatment plant on return water, avoiding the dilution of the return water sewage treatment on inlet water, and simultaneously achieving the purpose of backwash wastewater treatment;
2. the utility model discloses a backwash wastewater treatment device of a denitrification deep bed filter, on the basis of the original treatment process of the denitrification deep bed filter, a pipeline and a valve are additionally arranged on the carbon steel pipeline from the denitrification deep bed filter to the front section of a water inlet coarse grid well, backwash wastewater is intercepted to a middle lifting pump room and lifted to a high-efficiency sedimentation tank for on-site treatment, and the treatment of backflow water of the denitrification deep bed filter is reduced, so that the biochemical system of a sewage treatment plant reduces the influence of low nutrient source water on the water quality, the effects of stable growth, activity and the like of microorganisms in the sewage treatment process are enhanced, and the energy consumption of wastewater circulating treatment is saved;
3. compare with the deep bed filtering pond backward flow of denitrification among the prior art and handle, adopt the utility model discloses a deep bed filtering pond of denitrification backwash effluent treatment plant, sewage treatment plant's biochemical reaction pond can reduce 15761 ~ 19613t backward flow water volume's processing every day, has reduced the backward flow of low nutrition source water for the biochemical reaction pond can maintain activated sludge's periodic growth and proliferation better, has increased the effect of microorganism in sewage treatment process.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of a backwashing wastewater treatment device of a denitrification deep bed filter of the utility model;
FIG. 2 is a schematic flow chart of the backwashing wastewater treatment device of the denitrification deep bed filter for backwashing wastewater treatment.
Detailed Description
The present invention will be described in detail with reference to the following embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way.
As shown in figure 1, the backwashing wastewater treatment device of the denitrification deep bed filter of the utility model comprises a filter wastewater pool 140, a middle lift pump room 120, a high-efficiency sedimentation tank 130, related pipelines, valve group accessories and the like which are connected in sequence;
the filter tank wastewater tank 140 is connected with the backwashing wastewater outlet end of the denitrification deep bed filter tank and is used for collecting backwashing wastewater discharged after backwashing of the denitrification deep bed filter tank; the filter tank wastewater tank 140 is arranged at the front section of the water inlet coarse grid well 110 of the sewage treatment plant and is connected with the water inlet coarse grid well 110 through a first carbon steel pipeline 151; a wastewater submersible pump is arranged in the filter wastewater tank 140 and is used for sending backwashing wastewater to the middle lift pump room 120;
the middle lift pump room 120 is arranged between the filter tank wastewater tank 140 and the water inlet coarse grid 110, is specifically arranged close to the filter tank wastewater tank 140, and is connected with a first carbon steel pipeline 151 through a second carbon steel pipeline 152; the middle lift pump room 120 is provided with a lift pump, which is convenient for lifting the backwashing wastewater from the filter wastewater tank 140 to the high-efficiency sedimentation tank 130;
the first carbon steel pipeline 151 and the second carbon steel pipeline 152 are both provided with valves (manual valves), wherein the valve on the first carbon steel pipeline 151 is arranged between the water inlet pipeline of the water inlet coarse grid well 110 and the second carbon steel pipeline 152; through two valves, close first carbon steel pipeline 151, open second carbon steel pipeline 152, be convenient for hold back backwash waste water to middle lift pump house.
The high-efficiency sedimentation tank 130 is connected with the middle lift pump room 120 through a third carbon steel pipeline 153; the water inlet end of the high-efficiency sedimentation tank 130 is sequentially provided with a water inlet coagulation area and a water inlet flocculation area, the upper part of the high-efficiency sedimentation tank 130 is provided with a water outlet end, and the bottom of the high-efficiency sedimentation tank 130 is provided with a sedimentation outlet; the water inlet coagulation area is provided with a first dosing system, so that a coagulant can be conveniently added; the flocculation area of intaking is equipped with the second medicine system, is convenient for add anion coagulant aid. After the backwashing wastewater enters the high-efficiency sedimentation tank 130, the backwashing wastewater is subjected to chemical reaction sedimentation with a coagulant in a water inlet coagulation area to achieve the purposes of chemical phosphorus removal (TP) and reduction of Suspended Solid (SS) in water, and then is subjected to physical actions such as adsorption, neutralization, bridging and the like with an anion coagulant aid in a water inlet flocculation area, so that after suspended solid particles are concentrated and precipitated, mud-water separation is realized, and the clear water is ensured.
Through the transformation, backwash wastewater is intercepted to the middle lifting pump room 120 and is sent to the efficient sedimentation tank 130 for treatment, the treatment of backflow water is reduced, and the water inlet load of a sewage treatment plant is reduced.
As shown in figure 2, the utility model adopts the backwashing wastewater treatment device of the denitrification deep bed filter tank to carry out backwashing wastewater treatment, and specifically adopts the following steps:
(1) collecting backwashing wastewater after the denitrification deep bed filter is backwashed into a filter wastewater tank 140; the backwashing wastewater is discharged after being subjected to backwashing treatment such as air washing, air-water combined washing, water washing and the like by the denitrification deep bed filter, and is collected in a filter wastewater tank 140; wherein the time consumed by the backwashing treatment process of the denitrification deep bed filter tank is 1530-1950 s, and the time consumed by the air washing process is 130-150 s; in the process of gas-water combined washing, the time is 1200-1400 s; in the water washing process, the time is 200-400 s;
(2) after the backwashing wastewater in the filter wastewater tank 140 is connected to the middle lift pump room 120, the wastewater is lifted to the high-efficiency sedimentation tank 130 by the middle lift pump room 120 for treatment;
(3) adding a coagulant (such as polyaluminium chloride or polyaluminium ferric chloride) into a water inlet coagulation zone of the high-efficiency sedimentation tank 130 to complete the sedimentation of chemical phosphorus removal (TP) and Suspended Solid (SS), thereby achieving the purpose of removing suspended solids and further reducing the Suspended Solid (SS) and Total Phosphorus (TP) in the discharged water; adding an anion coagulant aid (such as polyacrylamide) to the water inlet flocculation zone of the high-efficiency sedimentation tank 130 to generate physical actions such as adsorption, neutralization, bridging and the like, thereby ensuring that suspended particles can be concentrated, precipitated and discharged and the discharged water is clear; when the polyaluminum ferric chloride is adopted, the adding rate of the polyaluminum ferric chloride is controlled to be 80-100 mg/L, and when the anion coagulant aid is polyacrylamide, the effective adding rate of the polyacrylamide is controlled to be 0.3-0.5 mg/L.
The backwashing wastewater treatment device of the denitrification deep bed filter of the utility model is further introduced by the following concrete examples;
examples
In a certain wastewater treatment plant, wastewater is treated by adopting a denitrification deep bed filter process, wherein the construction form of the denitrification deep bed filter is a reinforced concrete structure, and the structure is a cuboid; the method has the effects that solid suspended solids SS in the incoming water are physically separated through a deep bed filter material, a certain proportion of carbon source (sodium acetate) is added into the incoming water, and denitrification floras cultured in a pool are utilized to carry out biochemical denitrification treatment on nitrate nitrogen in the water, so that TN in the water is reduced. According to the process design, the filtering pool runs for a long time, the effluent turbidity is increased, the head loss is increased, the effluent capacity is reduced, and the back washing is required to be carried out periodically.
At present, according to the actual wastewater production, backwashing is carried out according to the odd groups of 11 grids (one time in 2 hours and two groups of independent operation) at regular time, backwashing is carried out in sequence, the next grid is backwashed at intervals of two hours, and backwashing is started according to odd time integral points made of 24 hours; wherein 23:00 and 24:00 do not backwash (idle); completing backwashing of 11 grids all day; the backwashing is carried out in an even number group of 11 grids in sequence, the backwashing is carried out at intervals of two hours and is started at an even time integral point of 24 hours, wherein the backwashing is not carried out at 2:00 and 24:00 (the backwashing is not carried out); generally speaking, one cell is back flushed in each whole hour, and 22 cells are back flushed in 22 hours.
Because backwashing is more frequent, the denitrification deep bed filter is reformed, backwashing wastewater of the wastewater treatment plant before reforming is sent to the front section of the water inlet coarse grid well 110 at the distance of 500 meters by using a carbon steel pipeline (a first carbon steel pipeline 151) of DN400 through a wastewater submersible pump of the wastewater tank of the filter, when reforming, an equal-diameter tee joint is arranged at the position (the position about 30 meters away from the middle lifting pump room 120) where the midway carbon steel pipeline (the first carbon steel pipeline 151) passes through the middle lifting pump room 120, the length of a newly-added DN400 carbon steel pipeline (a second carbon steel pipeline 152) is 20 +/-1 meters, the newly-added DN400 carbon steel pipeline (the second carbon steel pipeline 152) is connected to the middle lifting pump room 120, in order to control interception amount and switch function, the original process design route is reserved, two pipeline equal-diameter manual valves of DN400 are added at the original carbon steel pipeline (the first carbon steel pipeline 151) and the newly-added carbon steel pipeline (the second carbon steel pipeline 152) to intercept the backwashing wastewater nearby, and is fed into the water inlet end of the middle lift pump house 120.
After modification, the denitrification deep bed filter of the wastewater treatment plant is discharged after backwashing treatment such as gas washing for 130-150 s, gas-water combined washing for 1200-1400 s and water washing for 200-400 s, and the like, and is collected in a filter wastewater pool 140; the filter tank wastewater pool 140 connects the backwash wastewater to the middle lift pump room 120, and then lifts the wastewater from the middle lift pump room 120 to the high-efficiency sedimentation tank 130 for treatment; after backwash wastewater enters a water inlet coagulation zone of the efficient sedimentation tank 130, polyaluminum ferric chloride (the effective amount is about 10%) is added for treatment, the addition rate of the polyaluminum ferric chloride is controlled to be 80-100 mg/L, after full chemical reaction sedimentation is carried out, most of suspended solid SS and total phosphorus TP are removed, the treated wastewater enters a water inlet flocculation zone, under the action of polyacrylamide (the preparation concentration is 1 per mill, the effective addition rate of the polyacrylamide is controlled to be 0.3-0.5 mg/L), adsorption, neutralization and bridging effects are generated, solid suspended solid particles in the backwash wastewater are further concentrated, sludge is formed at the bottom of the efficient sedimentation tank 130 and then discharged, and upper effluent is discharged from the upper part of the efficient sedimentation tank.
Through the transformation, this wastewater treatment plant's backwash wastewater adopts as shown in figure 2 the utility model discloses a back is handled to the deep bed filtering pond backwash wastewater treatment of denitrification technology, and the biochemical reaction pond reduces 15761 ~ 19613 ton backward flow's processing daily, has not only reduced backwash wastewater to the load influence of water pump house, integration biological reaction pond of intaking, has reduced the backward flow of nutrient source water, can maintain activated sludge's periodic growth multiplication better, has increased the effect of microorganism in sewage treatment process. And the energy consumption of wastewater recycling treatment is greatly saved, and the operation cost is saved by about 1 × 20000 × 30 × 12 to 720 ten thousand yuan every year.
To sum up, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (4)
1. A backwashing wastewater treatment device of a denitrification deep bed filter is characterized by comprising a filter wastewater pool, a middle lift pump room and a high-efficiency sedimentation tank which are connected in sequence;
the filter tank wastewater tank is arranged at the front section of a water inlet coarse grid well of a sewage treatment plant and is connected with the water inlet coarse grid well through a first carbon steel pipeline; a wastewater submersible pump is arranged in the wastewater tank of the filter tank;
the middle lifting pump room is arranged between the filter tank wastewater pool and the water inlet coarse grid and is connected with the first carbon steel pipeline through a second carbon steel pipeline; the middle lifting pump room is provided with a lifting pump;
the high-efficiency sedimentation tank is connected with the middle lifting pump room through a third carbon steel pipeline; the water inlet end of the high-efficiency sedimentation tank is sequentially provided with a water inlet coagulation area and a water inlet flocculation area, the upper part of the high-efficiency sedimentation tank is provided with a water outlet end, and the bottom of the high-efficiency sedimentation tank is provided with a sedimentation outlet; the water inlet coagulation area is provided with a first dosing system, and the water inlet flocculation area is provided with a second dosing system.
2. The denitrification deep bed filter backwash wastewater treatment device according to claim 1, wherein the intermediate lift pump house is disposed adjacent to the filter wastewater basin.
3. The backwashing wastewater treatment device of the denitrification deep bed filter of claim 2, wherein valves are arranged on the first carbon steel pipeline and the second carbon steel pipeline;
the valve on the first carbon steel pipeline is arranged between the water inlet pipeline of the water inlet coarse grid well and the second carbon steel pipeline.
4. The denitrification deep bed filter backwashing wastewater treatment device of claim 3, wherein the length of the second carbon steel pipeline is 20 ± 1 m.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804395A (en) * | 2021-01-21 | 2022-07-29 | 上海城投污水处理有限公司 | Backwashing wastewater treatment device and treatment process for denitrification deep bed filter |
| CN115779506A (en) * | 2022-12-16 | 2023-03-14 | 湖南有色金属职业技术学院 | Multistage sediment device of non ferrous metal ore pulp |
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2021
- 2021-01-21 CN CN202120162991.9U patent/CN214299633U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804395A (en) * | 2021-01-21 | 2022-07-29 | 上海城投污水处理有限公司 | Backwashing wastewater treatment device and treatment process for denitrification deep bed filter |
| CN115779506A (en) * | 2022-12-16 | 2023-03-14 | 湖南有色金属职业技术学院 | Multistage sediment device of non ferrous metal ore pulp |
| CN115779506B (en) * | 2022-12-16 | 2024-05-17 | 湖南有色金属职业技术学院 | Multistage sedimentation device of nonferrous metal ore pulp |
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