CN214360867U - Gravity flow denitrification filter - Google Patents
Gravity flow denitrification filter Download PDFInfo
- Publication number
- CN214360867U CN214360867U CN202023273948.4U CN202023273948U CN214360867U CN 214360867 U CN214360867 U CN 214360867U CN 202023273948 U CN202023273948 U CN 202023273948U CN 214360867 U CN214360867 U CN 214360867U
- Authority
- CN
- China
- Prior art keywords
- filter
- water distribution
- main body
- denitrification
- tank main
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The application belongs to the technical field of sewage treatment equipment of environmental engineering and municipal engineering, and particularly relates to a gravity flow denitrification filter tank patent application matter. The filter tank specifically comprises: the filter comprises a filter body, a water distribution system arranged above the interior of the filter body, a filtering system arranged below the interior of the filter body, and a drain pipe positioned at the bottom of the filter body and used for discharging a treated water body; the water distribution system, comprising: the water distribution main pipe and the water distribution branch pipes extend downwards and are distributed on the water distribution main pipe; the filtration system, comprising: a filter material layer which is arranged above the filter plate and consists of filter materials, and a filter head arranged on the filter plate; the filter heads are uniformly distributed on the filter plate and consist of an umbrella-shaped filter cap with filter holes and hollow filter rods which penetrate through the filter plate and are arranged below the filter cap; and the filter material is naturally laid. This application has effectively guaranteed the oxygen deficiency environment of denitrification denitrogenation through improving denitrification filtering pond water distribution system that intakes, reduces the carbon source waste, practices thrift the running cost.
Description
Technical Field
The application belongs to the technical field of sewage treatment equipment of environmental engineering and municipal engineering, and particularly relates to a gravity flow denitrification filter tank patent application matter.
Background
In the effluent discharge standard of a sewage treatment plant, an important index is the total nitrogen content index in the treated sewage. In the prior art, engineering measures which are commonly adopted for removing the total nitrogen in the sewage comprise a conventional anoxic denitrification tank and a denitrification filter tank for advanced treatment. The denitrification filter tank has the following basic principle of denitrification: the total nitrogen in the sewage is removed by utilizing the denitrification of microorganisms in the biomembrane attached to the filter material in the reactor, and meanwhile, the suspended matters in the water are removed by the filter material in the reactor through physical filtration, so that the filtered water is discharged after reaching the standard.
In the prior art, when water enters a traditional denitrification filter tank, water is distributed in an open water distribution channel mode, and in the process, sewage to be treated flows and drops and is easily dissolved into new dissolved oxygen, so that the anaerobic environment required by the denitrification process is destroyed, the denitrification effect is reduced, and meanwhile, the waste of carbon sources is caused. On the other hand, in the case of a liquid,
the filter materials such as quartz sand, haydite in the current denitrification filtering pond need be in order to form the filter material layer with the help of the structural design of supporting layer, this structural design makes the filter material layer have that the filter material porosity is little on the one hand, the filter material layer easily blocks up, defects such as the phenomenon of short-flow appears easily, on the other hand makes the denitrification filtering pond when facing the backwash needs, make the distribution of recoil intensity evenly inadequately easily, there is the backwash blind area easily, it is not good to reduce the backwash effect, local hardening can also appear in the time of a specified duration, reduce denitrogenation effect and filter effect, also give the maintenance of denitrification filtering pond, the management brings a great deal of inconvenience, also easily waste plenty of time and manpower resources simultaneously. Therefore, the further structural design optimization of the denitrification filter tank still has very important technical significance.
Disclosure of Invention
The application aims to provide a gravity flow denitrification filter tank to overcome the defect of poor backwashing effect of the existing denitrification filter tank, thereby laying a certain technical foundation for the stability of denitrification effect in the sewage treatment process.
The technical solution adopted in the present application is detailed as follows.
A gravity flow denitrification filter tank is mainly suitable for sewage application of a sewage treatment plant after secondary biochemical treatment, and specifically comprises: the filter comprises a filter body, a water distribution system arranged above the interior of the filter body, a filtering system arranged below the interior of the filter body, and a drain pipe positioned at the bottom of the filter body and used for discharging a treated water body;
the water distribution system, comprising: the water distribution main pipe and the water distribution branch pipes extend downwards and are distributed on the water distribution main pipe; when the sewage after the secondary biochemical treatment flows in the main water distribution pipe and the branch water distribution pipe, the relatively sealed operation environment can better prevent oxygen in the air from dissolving into the sewage, so that the anaerobic environment required by denitrification is damaged; in actual operation, in order to avoid the occurrence of siphonage and air pressure fluctuation, two vent holes with the diameter of 10mm can be arranged at the top of the water distribution main pipe;
the filtration system, comprising: a filter material layer which is arranged above the filter plate and consists of filter materials, and a filter head arranged on the filter plate;
the filter heads are uniformly distributed on the filter plate and consist of an umbrella-shaped filter cap with filter holes and a hollow filter rod penetrating through the filter plate under the filter cap, and in the preferred design, the middle part of the filter rod is also provided with an air inlet; after denitrification and filtration treatment of the filter system, sewage is collected into a space below a filter body at the lower part of the filter plate through a filter cap and a filter rod in sequence and is finally discharged through a drain pipe;
the filter material is generally a homogeneous filter material with the particle size of 2-3mm, and all the filter materials are laid naturally, so that fine suspended matters in sewage gradually migrate to a lower layer in the process of naturally filtering the sewage by the filter material, so that most of the filter layers can play a role in intercepting sewage, and the purpose of improving the sewage intercepting capability is further achieved; in the actual operation process, the sewage to be treated is filtered by the filter material, and on the other hand, the nitrogen source in the sewage is matched with the original carbon source in the sewage or the additionally added carbon source is converted by microorganisms attached to the surface of the filter material under the denitrification effect, so that the denitrification process is completed.
In the actual design, the inside adjustable back flush system (backwash wastewater discharge system) that still designs of denitrification filter main part to carry out the back flush to the filter material in the filter main part, thereby the operating cycle of extension denitrification filter, specifically:
the backwash system includes: a reflection cone and a back-washing wastewater discharge pipe which are positioned below the filter plate in the filter tank main body;
the backwashing wastewater discharge pipe is arranged above a filter material layer in the filter tank main body and is positioned below the water distribution system, and is formed by connecting an inner wire pipe positioned in the filter tank main body and an outer wire pipe positioned outside the filter tank main body;
the reflecting cone is fixed under the filter plate of the filter chamber main body and is a cone.
In the specific operation process, sewage to be treated firstly enters the filter tank main body through the closed water distribution system, and in the process, the anaerobic environment of subsequent denitrification can be better ensured due to the relatively closed environment; then, after the sewage to be treated enters the filter material layer, on one hand, impurities in the sewage to be treated are physically filtered and purified by the filter material, and on the other hand, a nitrogen source in the sewage to be treated is converted by denitrifying microorganisms on the surface of the filter material so as to complete a denitrification process; and finally, discharging the sewage through a drain pipe after the treatment is finished. After the backwashing system runs for a period of time, the filtering resistance begins to increase along with the retention of particles in water on the filter material layer, the water level in the filter tank main body also rises, and the backwashing system can be run at the moment. The design of two-stage backwashing water and gas distribution can ensure that the backwashing water and gas can flush the filter material more uniformly and efficiently, thereby effectively prolonging the operation period of the filter tank.
Compared with the prior art, the denitrification filter tank provided by the application has the technical advantages that:
(1) the sewage uniformly enters the filter tank through the water inlet and distribution main pipe and the water distribution branch pipe on the upper part of the filter tank main body, and in the process, the sewage flows in the pipe, so that dissolved oxygen in the air is prevented from entering water and damaging the anoxic environment of denitrification nitrogen removal. The denitrification efficiency is improved, the waste of carbon sources is reduced, and the operation cost is saved;
(2) the denitrification filter tank adopts homogeneous filter materials with the particle size of 2-3mm, a supporting layer is not needed, fine suspended matters can migrate to a lower layer during filtering, most of the filter layers play a role in intercepting sewage, and the sewage intercepting capability is higher;
(3) the backwashing system is used for two-stage water and gas distribution, the first stage is uniformly dispersed after hitting the reflecting cone, and the second stage is used for compensating the filter head and uniformly distributing water and gas. The water distribution system of the reflecting cone and the filter head filter plate has simple structure, small head loss, low energy consumption, no dead water area and most reasonable hydraulic distribution;
(4) when the air cushion layer is gradually increased to the strip-shaped air inlet hole at the lower part of the filter rod, the air enters the filter rod from the air cushion layer, and is rushed out from the gap of the filter cap to be sheared and scoured to the surfaces of filter material particles, so that the filter material is rushed to the upper part of the filter layer, and the filter material is cleaned. After secondary compensation under the action of the filter head, final backwashing water and air pressure on the filtering area of the whole filter tank are distributed more uniformly. The backwashing efficiency is improved, the operation period of the filter tank is prolonged, and the most thorough cleaning effect is achieved;
(5) the backwash wastewater pipe orifice is designed with adjustable height, the filter material layer expansion rate is adjusted according to the actual operation condition of an engineering during backwashing, the height and the backwash strength of the backwash wastewater pipe orifice are adjusted regularly, the material running is prevented, the system is flexible and reliable in operation, backwashing is more thorough, the backwashing water utilization rate is improved, and water is saved.
Generally, the denitrification filter tank water inlet and distribution system is improved, the anoxic environment for denitrification is effectively guaranteed, waste of carbon sources is reduced, and the operation cost is saved. The backwashing system is of a two-stage water and gas distribution structure, so that backwashing water and gas pressure of the whole filter tank are distributed more uniformly and stably, backwashing strength is uniform without blind areas, and the system is more flexible and reliable in operation due to the adjustable backwashing wastewater discharge pipe. And the structure design is simple and novel, the operation is flexible, safe and reliable, and the device has good popularization and application values for small and medium-sized sewage treatment plants.
Drawings
FIG. 1 is a front view of a gravity flow denitrification filter;
FIG. 2 is a top view of a water inlet and distribution pipe;
FIG. 3 is a front view of the filter head
Figure 4 is a front view of a backwash wastewater pipe.
Detailed Description
The present application is further illustrated by the following examples.
Examples
As shown in fig. 1 to 4, the gravity flow denitrification filter provided by the present application is mainly adapted to the sewage application of a sewage treatment plant after secondary biochemical treatment, and specifically comprises:
the filter body 1, a water distribution system arranged above the interior of the filter body 1, a filtering system arranged below the interior of the filter body 1, and a drain pipe 10 positioned at the bottom of the filter body 1 and used for discharging the treated water body;
the water distribution system, comprising: the water distribution device comprises a main water distribution pipe 2 and a branch water distribution pipe 3 which extends downwards on the main water distribution pipe 2; when the sewage after the secondary biochemical treatment flows in the main water distribution pipe 2 and the branch water distribution pipes 3, the relatively sealed operation environment can better prevent oxygen in the air from dissolving into the sewage, so that the anaerobic environment required by denitrification is damaged; in actual operation, in order to avoid the occurrence of siphonage and air pressure fluctuation, a plurality of vent holes 4 with the diameter of 10mm can be arranged at the top of the water distribution main pipe 2;
the filtration system, comprising: a filter material layer which is arranged above the filter plate 8 and consists of filter materials 6, and a filter head 7 arranged on the filter plate 8;
the filter heads 7 are uniformly distributed on the filter plate 8 and are composed of umbrella-shaped filter caps 13 with filter holes and hollow filter rods 14 which penetrate through the filter plate 8 and are arranged below the filter caps 13, and in the preferred design, the middle parts of the filter rods 14 are also provided with air inlet holes 15; after denitrification and filtration treatment of the filter system, sewage is collected into a space below the filter body 1 at the lower part of the filter plate 8 through the filter cap 13 and the filter rod 14 in sequence and finally discharged through the drain pipe 10;
the filter material 6 is generally a homogeneous filter material with a particle size of 2-3mm, and a separate supporting layer for supporting the filter material is not required to be arranged in the application (it should be explained that in the prior art, during traditional design, the supporting layer for supporting the filter material is required to be designed, the main function of the supporting layer is to prevent the filter material from losing from a water distribution system, and simultaneously has a certain effect on uniform water distribution, in the application, the water flow at the filter plate 8 has a good water distribution effect, and the filter head 7 has a good interception effect on the homogeneous filter material, so that the separate supporting layer is not required to be adopted), all the filter materials are laid naturally, and thus, fine suspended matters in the sewage can gradually migrate to a lower layer in the natural filtering process of the filter material, so that most of the filter layer can exert the function of intercepting the sewage, and the purpose of improving the sewage intercepting capability is achieved; in the actual operation process, the sewage to be treated is filtered by the filter material, and on the other hand, the nitrogen source in the sewage is matched with the original carbon source in the sewage or the additionally added carbon source is converted by microorganisms attached to the surface of the filter material under the denitrification effect, so that the denitrification process is completed.
In the actual design, the inside adjustable back flush system (backwash wastewater discharge system) that still designs of denitrification filtering pond main part to carry out the back flush to 1 inside and filter material in filtering pond, thereby the operating cycle of extension denitrification filtering pond, specifically:
the backwash system includes: a reflecting cone 9 and a back flush wastewater discharge pipe 5 which are positioned below a filter plate 8 in the filter body 1;
the backwashing wastewater discharge pipe 5 is arranged above a filter material layer in the filter tank main body 1 and below a water distribution system, and is formed by connecting an inner wire pipe 16 in the filter tank main body 1 and an outer wire pipe 17 outside the filter tank main body 1;
the reflecting cone 9 is fixed under the filter plate 8 of the filter tank main body 1 and is a cone; when backwashing is carried out, backwashing water enters from the water outlet pipe and hits the reflection cone, the reflection cone is used for reversely and uniformly dispersing the backwashing water so as to enable the backwashing water to enter the filter heads 7 on the filter plates 8, and the filter heads 7 on the filter plates 8 play a role in uniformly distributing water again; the reflecting cone 9 plays a very key role in the even distribution of air and water (namely the evenness of backwashing) by matching with the air and water backwashing.
The back washing system mainly adopts a two-stage water and gas distribution mode to back wash the interior of the filter tank main body 1 and the filter material; taking gas backwashing as an example, specifically, after the backwashing gas firstly hits the reflecting cone 9, the gas is uniformly dispersed on the bottom surface of the filter plate 8 and forms an air cushion layer, thereby completing first-stage gas distribution, and at the moment, the gas is mainly used for washing the space below the filter tank main body 1; (first-stage water distribution flushing, namely backwashing water vapor enters from a water outlet 10, the backwashing water vapor is uniformly dispersed by a reflection cone to form uniformly distributed backwashing water airflow which flows to a filter plate 8), then the backwashing gas is regulated by a filter head 7 to complete second-stage gas distribution and enters the bottom of the filter material layer, and then is flushed out by a filter cap 13 and/or an air inlet 15 to shear and flush the surface of the filter material 6, so that dirt on the surface of the filter material 6 is flushed to the upper part of the filter layer, and the filter material 6 is cleaned.
After the back washing is finished, the pollutants which are washed back are finally discharged through the back washing wastewater discharge pipe 5.
It should be noted that the facility is mainly used for upgrading and reconstructing sewage treatment plants in small and medium-sized villages and towns, and particularly has good application value for sewage with low carbon-nitrogen ratio and difficult standard reaching of total nitrogen. The primary application effect shows that the total nitrogen of the effluent can be stabilized from 20mg/L to below 15 mg/L. The gravity flow denitrification filter tank is flexible to operate, can better save the adding amount of a carbon source (namely reduce the operation cost), and has more stable and reliable treatment effect, thereby having better practical value.
Claims (5)
1. A gravity flow denitrification filter tank is characterized in that the filter tank is mainly suitable for sewage application of a sewage treatment plant after secondary biochemical treatment, and specifically comprises:
the device comprises a filter tank main body, a water distribution system arranged above the inside of the filter tank main body, an adjustable backwashing wastewater discharge system arranged inside the filter tank main body, a filtering system arranged below the inside of the filter tank main body, and a drain pipe positioned at the bottom of the filter tank main body and used for discharging a treated water body;
the water distribution system, comprising: the water distribution main pipe and the water distribution branch pipes extend downwards and are distributed on the water distribution main pipe;
the filtration system, comprising: a filter material layer which is arranged above the filter plate and consists of filter materials, and a filter head arranged on the filter plate;
the filter heads are uniformly distributed on the filter plate and consist of an umbrella-shaped filter cap with filter holes and hollow filter rods which penetrate through the filter plate and are arranged below the filter cap;
and the filter material is naturally laid.
2. The gravity flow denitrification filter according to claim 1, wherein in the water distribution system, a plurality of vent holes with the diameter of 10mm are arranged at the top of the water distribution main pipe.
3. A gravity flow denitrification filter according to claim 1, wherein the denitrification filter is designed with a backwash system, specifically:
the backwash system includes: a reflection cone and a back-washing wastewater discharge pipe which are positioned below the filter plate in the filter tank main body;
the backwashing wastewater discharge pipe is arranged above a filter material layer in the filter tank main body and is positioned below the water distribution system, and is formed by connecting an inner wire pipe positioned in the filter tank main body and an outer wire pipe positioned outside the filter tank main body;
the reflecting cone is fixed under the filter plate of the filter chamber main body and is a cone.
4. The gravity flow denitrification filter according to claim 1, wherein the filter system is provided with an air inlet hole in the middle of the filter rod.
5. The gravity flow denitrification filter according to claim 1, wherein the filter material is homogeneous filter material with a particle size of 2-3 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023273948.4U CN214360867U (en) | 2020-12-30 | 2020-12-30 | Gravity flow denitrification filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023273948.4U CN214360867U (en) | 2020-12-30 | 2020-12-30 | Gravity flow denitrification filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214360867U true CN214360867U (en) | 2021-10-08 |
Family
ID=77950935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023273948.4U Active CN214360867U (en) | 2020-12-30 | 2020-12-30 | Gravity flow denitrification filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214360867U (en) |
-
2020
- 2020-12-30 CN CN202023273948.4U patent/CN214360867U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106167339B (en) | For the ecological carbon fiber SBBR and artificial wetland combination processing system and processing method of Treated sewage reusing | |
| CN102491500A (en) | Layered oxygen-supply aeration bacteria filter | |
| CN205023952U (en) | Vertical current subsurface flow constructed wetlands | |
| CN203425572U (en) | Upflow double-type deep-bed rapid filtering tank | |
| CN106517524B (en) | A kind of device and method of micro- aeration rotating wetland filtering pond processing town sewage | |
| CN109516637A (en) | A kind of energy-efficient Domestic sewage integrated treatment unit | |
| CN105601043A (en) | Ecological micro-power treatment system for domestic sewage of villages and towns | |
| CN214360867U (en) | Gravity flow denitrification filter | |
| CN209835761U (en) | Constructed wetland that can wash automatically | |
| CN111302486A (en) | Upward-flow light-weight filter material biological filter | |
| CN108117151A (en) | A kind of moving bed denitrification denitrogenation filter tank and denitrogenation method | |
| CN216986709U (en) | Unpowered sponge filler advanced treatment filter equipment | |
| CN112624522A (en) | Gravity flow denitrification filter | |
| CN116002857A (en) | Modified denitrification deep bed filter and modification method | |
| CN211999029U (en) | Upward-flow light-weight filter material biological filter | |
| CN206447646U (en) | Sewage-treatment plant | |
| CN204298145U (en) | A kind of rearmounted denitrification organisms filtration system | |
| CN205442795U (en) | A high efficiency aeration biological filter device for angering explosive waste water treatment | |
| CN212982578U (en) | Integrated villages and towns sewage treatment system | |
| CN108640415B (en) | Efficient backwashing artificial ecological sewage land treatment system | |
| CN210711144U (en) | Modularized backwashing constructed wetland device | |
| CN202089864U (en) | Device for recycle and treatment of reclaimed water | |
| CN208327725U (en) | A kind of equally distributed artificial swamp of sewage | |
| CN111453898A (en) | Iron-carbon micro-electrolysis sewage and wastewater treatment equipment and use method | |
| CN206955755U (en) | Three rank O/A decentralized type sewages handle integrated apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |