CN211546087U - Automatic back flush system of denitrification filtering pond - Google Patents
Automatic back flush system of denitrification filtering pond Download PDFInfo
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- CN211546087U CN211546087U CN201922118034.1U CN201922118034U CN211546087U CN 211546087 U CN211546087 U CN 211546087U CN 201922118034 U CN201922118034 U CN 201922118034U CN 211546087 U CN211546087 U CN 211546087U
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Abstract
An automatic back-flushing system of a denitrification filter tank comprises: the device is characterized by comprising a denitrification filter tank, a water inlet and water distribution pipe, a water inlet electric valve, a backwashing layered water distributor, a backwashing liquid level meter, a backwashing water pump, a backwashing electric valve, a sludge discharge pipe, a sludge discharge electric valve and the like. When the set backwashing liquid level is reached, a backwashing liquid level meter feedback signal system starts automatic backwashing, a water inlet electric valve, a water outlet electric valve and a mud discharge electric valve are closed, and a backwashing water pump and a backwashing electric valve are started; the backwashing water pump carries out layered backwashing on the denitrification filter tank through the backwashing water distributor; and the cleaned sewage is collected by a conical mud bucket at the bottom and then is discharged out of the system through a mud pipe. The defect of backwashing of the traditional denitrification filter by time control is overcome, and the backwashing effect of the denitrification filter is effectively improved; the problem of the denitrification filtering pond adopt single water backwash, the drawback that the backwash effect is poor is solved, air backwash when having solved air water while backwash destroys the inside anaerobic environment of denitrification filtering pond simultaneously, influences the denitrogenation effect.
Description
Technical Field
The utility model relates to an automatic backwashing system of denitrification filtering pond, a high-efficient, energy-conserving automatic backwashing system of denitrification filtering pond particularly.
Background
Along with the improvement of the environmental protection requirement, the discharge standard of water pollutants is inevitably improved, the discharge standard of class V surface water of the effluent of some local sewage plants is already implemented, most sewage plants in China adopt an activated sludge treatment process, the content of total nitrogen and suspended matters in the effluent is higher, and denitrifying bacteria carry out denitrification in an anaerobic environment on the premise that a carbon source is added at the front end of a denitrifying filter tank, so that the total nitrogen in the water is further degraded; the total nitrogen is degraded, and simultaneously the suspended matters in the water can be reduced.
When the denitrification filter tank operates, along with the accumulation of filtered suspended matters among the filter layers, the water flow resistance of the filter layers is gradually increased, the water yield and the effluent quality are influenced, and at the moment, the denitrification filter tank needs to be backwashed; the traditional backwashing controls backwashing frequency by time, and has the defects of poor backwashing effect and large backwashing water amount; single water backwashing, incomplete backwashing and uneven backwashing; air and water are backwashed simultaneously, and the content of dissolved oxygen in water rises instantly during air backwashing, so that the anaerobic environment in the denitrification filter is destroyed, and the denitrification effect is seriously influenced.
Disclosure of Invention
To the above-mentioned current situation, the utility model aims to design an automatic backwash system in denitrification filtering pond operation is stable, the cleaning performance is good, maintain simply, can solve the shortcoming of time control backwash frequency, can solve the destruction of air backwash to anaerobic environment again.
The utility model aims at realizing through the following technical scheme: an automatic back-flushing system of a denitrification filter tank comprises: the device is characterized by comprising a denitrification filter tank, a water inlet water distribution pipe, a water inlet electric valve, a water outlet electric valve, a backwashing layered water distributor, a backwashing liquid level meter, a backwashing water pump, a backwashing electric valve, a sludge discharge pipe, a sludge discharge electric valve and the like. When the denitrification filter tank operates, along with the accumulation of filtered suspended matters among the filter layers, the water flow resistance of the filter layers is gradually increased, the water yield and the effluent quality are influenced, and at the moment, the denitrification filter tank needs to be backwashed; when the set backwashing liquid level is reached, a backwashing liquid level meter feedback signal system starts automatic backwashing, a water inlet electric valve, a water outlet electric valve and a mud discharge electric valve are closed, and a backwashing water pump and a backwashing electric valve are started; the backwashing water pump utilizes the clean water tank to provide a backwashing water source to ensure backwashing strength, and the backwashing water distributor is used for carrying out layered backwashing on the denitrification filter; and the cleaned sewage is collected by a conical mud bucket at the bottom and then is discharged out of the system through a mud pipe.
The water inlet and distribution pipe of the denitrification filter is arranged at the bottom of the filter and adopts a perforation form to uniformly feed water.
The bottom of the denitrification filter tank is provided with a conical sludge discharge hopper, and a sludge discharge pipe is arranged on the inner side of the sludge discharge hopper.
And the backwashing liquid level meter is arranged above the filter tank, monitors the filtering liquid level and automatically starts a backwashing program.
And the backwashing water pump is connected with the backwashing electric valve and the backwashing layered water distributor through pipelines.
The backwashing layered water distributor has three layers, from bottom to top, the pore diameters of the backwashing water distributors are sequentially increased, the backwashing strength is sequentially reduced, the backwashing strength of the filtering material at the lowest layer is the maximum, and the backwashing strength of the filtering material at the uppermost layer is the minimum; the effect is best by layered backwashing.
And the switches of the water inlet electric valve, the water outlet electric valve, the backwashing electric valve and the mud discharging electric valve are automatically controlled by a PLC.
Drawings
FIG. 1 is a schematic diagram of the structure of an automatic back-washing system of the denitrification filter tank of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below: 1. the device comprises a denitrification filter tank, 2, a water inlet distribution pipe, 3, a water inlet electric valve, 4, a water outlet electric valve, 5, a backwashing layered water distributor, 6, a backwashing liquid level meter, 7, a backwashing water pump, 8, a backwashing electric valve, 9, a sludge discharge pipe, 10 and a sludge discharge electric valve.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in figure 1, an automatic back-flushing system of a denitrification filter comprises: the device is characterized by comprising a denitrification filter tank, a water inlet water distribution pipe, a water inlet electric valve, a water outlet electric valve, a backwashing layered water distributor, a backwashing liquid level meter, a backwashing water pump, a backwashing electric valve, a sludge discharge pipe, a sludge discharge electric valve and the like.
The water inlet and distribution pipe of the denitrification filter is arranged at the bottom of the filter and adopts a perforation form to uniformly feed water.
The bottom of the denitrification filter tank is provided with a conical sludge discharge hopper, the inner side of the sludge discharge hopper is provided with a sludge discharge pipe, and the sludge discharge pipe is provided with a sludge discharge electric valve for automatically discharging sludge.
And a backwashing liquid level meter is arranged above the filter tank, the filtering liquid level is monitored, and when the liquid level reaches a set backwashing liquid level, the system automatically starts a backwashing program.
The backwashing water pump is connected with the backwashing electric valve and the backwashing layered water distributor through pipelines.
The backwashing layered water distributor has three layers, from bottom to top, the pore diameters of the backwashing water distributor are sequentially increased, the backwashing strength is sequentially reduced, the backwashing strength of the filtering material at the lowest layer is the maximum, and the backwashing strength of the filtering material at the uppermost layer is the minimum; the effect is best by layered backwashing.
And the switches of the water inlet electric valve, the water outlet electric valve, the backwashing electric valve and the mud discharging electric valve are automatically controlled by a PLC.
In the description herein, reference to the term "implementation example" means that a particular method, apparatus, or feature described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, methods, apparatuses, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. An automatic backwashing system of a denitrification filter is characterized by comprising the denitrification filter, a water inlet distribution pipe, a water inlet electric valve, a water outlet electric valve, a backwashing layered water distributor, a backwashing liquid level meter, a backwashing water pump, a backwashing electric valve, a sludge discharge pipe and a sludge discharge electric valve.
2. The automatic backwashing system of the denitrification filter tank of claim 1, wherein: when the denitrification filter tank operates, along with the accumulation of filtered suspended matters among the filter layers, the water flow resistance of the filter layers is gradually increased, the water yield and the effluent quality are influenced, and at the moment, the denitrification filter tank needs to be backwashed; when the set backwashing liquid level is reached, a backwashing liquid level meter feedback signal system starts automatic backwashing, a water inlet electric valve, a water outlet electric valve and a mud discharge electric valve are closed, and a backwashing water pump and a backwashing electric valve are started; the backwashing water pump utilizes the clean water tank to provide a backwashing water source to ensure backwashing strength, and the backwashing water distributor is used for carrying out layered backwashing on the denitrification filter; and the cleaned sewage is collected by a conical mud bucket at the bottom and then is discharged out of the system through a mud pipe.
3. The automatic backwashing system of the denitrification filter tank of claim 1, wherein: the water inlet and distribution pipe of the denitrification filter is arranged at the bottom of the filter and adopts a perforation form to uniformly feed water.
4. The automatic backwashing system of the denitrification filter tank of claim 1, wherein: the bottom of the denitrification filter tank is provided with a conical sludge discharge hopper, and the inner side of the sludge discharge hopper is provided with a sludge discharge pipe.
5. The automatic backwashing system of the denitrification filter tank of claim 1, wherein: and a backwashing liquid level meter is arranged above the filter tank, monitors the filtering liquid level and automatically starts a backwashing program.
6. The automatic backwashing system of the denitrification filter tank of claim 1, wherein: the backwashing water pump is connected with the backwashing electric valve and the backwashing layered water distributor through pipelines.
7. The automatic backwashing system of the denitrification filter tank of claim 1, wherein: the backwashing layered water distributor has three layers, from bottom to top, the pore diameters of the backwashing water distributor are sequentially increased, the backwashing strength is sequentially reduced, the backwashing strength of the filtering material at the lowest layer is the maximum, and the backwashing strength of the filtering material at the uppermost layer is the minimum; the effect is best by layered backwashing.
8. The automatic backwashing system of the denitrification filter tank of claim 1, wherein: the switch of the water inlet electric valve, the water outlet electric valve, the backwashing electric valve and the mud discharging electric valve is automatically controlled by a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922118034.1U CN211546087U (en) | 2019-12-02 | 2019-12-02 | Automatic back flush system of denitrification filtering pond |
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| CN201922118034.1U CN211546087U (en) | 2019-12-02 | 2019-12-02 | Automatic back flush system of denitrification filtering pond |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759073A (en) * | 2020-11-26 | 2021-05-07 | 北京中科圣泰环境科技有限公司 | Backwashing method of denitrification biological filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112759073A (en) * | 2020-11-26 | 2021-05-07 | 北京中科圣泰环境科技有限公司 | Backwashing method of denitrification biological filter |
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