CN210905273U - Carrier filter - Google Patents
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- CN210905273U CN210905273U CN201921723752.5U CN201921723752U CN210905273U CN 210905273 U CN210905273 U CN 210905273U CN 201921723752 U CN201921723752 U CN 201921723752U CN 210905273 U CN210905273 U CN 210905273U
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Abstract
The utility model discloses a carrier filter, which comprises a shell, a suspension carrier bed, a sludge buffer zone and a sludge layer; a water distribution system is arranged in the sludge layer and is connected with one end of a water inlet pipe, and the other end of the water inlet pipe extends out of the shell; the sludge buffer zone is arranged between the sludge layer and the suspension carrier bed, the suspension carrier bed is separated from the sludge buffer zone by a support screen, a water outlet interception screen is also arranged above the suspension carrier bed, and the water outlet interception screen is also communicated with the water collecting tank; the water collecting tank is positioned above the suspension carrier bed and communicated with the shell. The beneficial effects of the utility model are that, possess high-efficient integrated sediment and filtering capability, have that solid-liquid separation is efficient, the technology integrated level is high, go out water effectual, the operation is stable, take up an area of advantage such as economize, be particularly useful for the sediment filtration equipment among the middle-size and small-size sewage treatment project.
Description
Technical Field
The utility model relates to a sewage treatment device technical field especially relates to a carrier filter.
Background
At present, with the rapid development of urban construction and the continuous improvement of the living standard of people, the discharge amount of domestic sewage is continuously increased, and the discharge amount becomes an important factor for restraining the healthy development of national economy.
The biological method treatment has the advantages of low cost, less secondary pollution, mild conditions and the like, and is widely applied to the treatment of domestic sewage in villages and towns. However, with the stricter sewage drainage standards, the discharge requirement of SS of part of rural domestic sewage effluent is higher than the first-class B discharge standard (SS is less than or equal to 20mg/L), even reaches the first-class A discharge standard (SS is less than or equal to 10 mg/L).
As the effluent SS of the conventional secondary sedimentation tank, such as a vertical sedimentation tank and an inclined plate (pipe) sedimentation tank, is generally 20-40 mg/L, the effluent SS can not stably reach the discharge standard of the first grade B and above. It is often necessary to use a filter device, such as a sand filter tank, to achieve a level B or above discharge level.
In the practical application process, the surface load of the vertical sedimentation tank is low, the tank is deep and high, the occupied area is large, and the influence of a water distribution mode, sludge settling performance, denitrification floating sludge, anaerobic floating sludge and the like is large; the inclined plate (pipe) sedimentation tank has poor buffering capacity, the inclined pipe is easy to accumulate mud, the water outlet stability is influenced, and the operation and maintenance workload is increased. The sand filtration tank equipment has large internal head loss, and needs to be matched with facilities such as a clean water tank, a lifting pump, a backwashing pump and the like, so that the operation cost and the manufacturing cost are greatly increased; meanwhile, the requirement on the SS of the inlet water is high, and the SS is generally less than or equal to 40 mg/L; and the problems that the filter material is easy to block or harden, the backwashing water amount is large (2-5 percent), and the like exist.
SUMMERY OF THE UTILITY MODEL
For the play water SS that exists among the solution secondary sedimentation tank independent treatment process on the high side, take up an area of big, receive the influence of mud, the relatively poor scheduling problem of stability to and the occupation of land that exists is big in secondary sedimentation tank and the sand filter jar allies oneself with the use of technology, the backwash degree of difficulty is high, the backwash water yield is big, fortune dimension and high technical problem of manufacturing cost, the utility model discloses a carrier filter.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a carrier filter comprises a shell, a suspended carrier bed, a sludge buffer zone and a sludge layer, wherein the suspended carrier bed, the sludge buffer zone and the sludge layer are arranged in the shell; a water distribution system is arranged in the sludge layer and is connected with one end of a water inlet pipe, and the other end of the water inlet pipe extends out of the shell; the sludge buffer zone is arranged between the sludge layer and the suspension carrier bed, the suspension carrier bed is separated from the sludge buffer zone by a support screen, a water outlet interception screen is also arranged above the suspension carrier bed, and the water outlet interception screen is also communicated with the water collecting tank; the water collecting tank is positioned above the suspension carrier bed and communicated with the shell; the shell is also provided with a water outlet pipe, a backwashing air pipe, a middle sludge discharge pipe and a bottom sludge discharge pipe.
The technical scheme of the utility model still include, the outlet pipe is linked together with the lower part of water catch bowl, the backwash tuber pipe is linked together with the lower part of suspension carrier bed, middle part mud pipe, bottom mud pipe set up respectively in upper portion, the lower part of sludge blanket, and through the mud level of middle part mud pipe regulation and control sludge blanket.
The technical scheme of the utility model still include equally divide on outlet pipe, backwash tuber pipe, middle part mud pipe and the bottom mud pipe and do not install control flap.
The technical proposal of the utility model also includes that the backwashing air pipe is evenly arranged at the lower part of the suspension carrier bed, and the aeration form is perforated pipe aeration.
The technical scheme of the utility model still includes, water distribution system is selected from one of toper water-locator, dull and stereotyped cellular type water-locator, perforation tubular water-locator.
The technical scheme of the utility model still include, the height of suspension carrier bed is 0.4 ~ 1.5m, the height of mud buffer is 0.3 ~ 0.7m, the height on sludge blanket is 0.5 ~ 1.2 m.
The technical scheme of the utility model still include, it has the suspension carrier to fill in the suspension carrier bed, and the shape of suspension carrier is at least one in column, globular, the rectangle, and the material of suspension carrier is at least one in HDPE, PE, PUR, PP and the PU, and diameter or length of side are 10 ~ 40 mm.
The technical scheme of the utility model still include, the support screen cloth is dull and stereotyped screen cloth, and the trompil size of support screen cloth is 8 ~ 20 mm.
The technical scheme of the utility model still include, it is dull and stereotyped screen cloth or cylinder screen cloth to go out the water interception screen cloth, and goes out the trompil size of water interception screen cloth and be 8 ~ 20 mm.
The utility model has the advantages that:
1. the utility model discloses an integration of the function of traditional sedimentation tank and sand filtration has advantages such as solid-liquid separation is efficient, go out that the water is effectual, the operation is stable, take up an area of and economize.
2. The problem that the SS of the effluent treated by the conventional secondary sedimentation tank is higher is solved, and the pollutant carrying capacity and treatment effect of the system are greatly improved; under the action of the water distribution system, raw water uniformly passes through a sludge layer, a large amount of sludge flocs carried in the raw water are firstly intercepted by the sludge layer, a small amount of sludge flocs which are not intercepted enter a suspension carrier bed to be further intercepted, and supernatant passes through a water outlet intercepting screen to realize separation of supernatant-suspension carriers.
3. The problems of high tank depth, large occupied area, influence by floating mud and poor stability of the secondary sedimentation tank are solved; the arrangement of the suspension carrier bed can greatly improve the surface load of the system and reduce the occupied area; meanwhile, the sludge layer is in a micro-expansion state under the action of raw water, and the risk of floating of denitrification floating mud or anaerobic floating mud is avoided; when the sludge layer is unstable, the concentration of sludge flocs in the sludge buffer zone is higher, and the stability of effluent can be still ensured under the interception action of the suspension carrier bed.
4. The problems of large loss, high backwashing difficulty, large backwashing water amount, easy hardening and the like of the traditional sand filtration head are solved; compared with the conventional filter tank, the suspension carrier has larger filter material particles and high porosity, can greatly improve the pollutant carrying capacity of the system and greatly reduce the head loss of the system; in the backwashing process, because the suspended carrier is light in weight and high in porosity, the suspended carrier can be in a fluidized state by a small amount of aeration, the backwashing effect is obviously enhanced, and the backwashing difficulty is reduced.
5. The removal of total nitrogen can be enhanced; the bottom of the carrier filter is provided with a sludge layer with a certain thickness, and nitrate nitrogen carried in the inlet water can generate endogenous denitrification after passing through the sludge layer so as to reduce the total nitrogen of the outlet water.
6. Coagulant can be added into the water inlet pipe for chemical phosphorus removal, and the total phosphorus concentration of the effluent is low.
7. Subsequent filtering facilities are saved, and the process flow is shortened; the subsequent matching of filtering facilities is reduced, and the investment cost, the operation energy consumption and the operation management difficulty are reduced; and an automatic control system is arranged, so that unattended operation can be realized.
To sum up, the utility model has the advantages of solid-liquid separation is efficient, the technology integrated level is high, go out water effectual, the operation is stable, take up an area of and economize, be particularly useful for the sediment filtration equipment among the middle-size and small-size sewage treatment project.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein, 1-shell; 2-water inlet pipe; 3-a water distribution system; 4-sludge blanket; 5-a sludge buffer zone; 6-supporting the screen mesh; 7-a bed of suspended carrier; 8-a water outlet interception screen mesh; 9-a water collecting tank; 10-water outlet pipe; 11-backwashing the air pipe; 12-a middle sludge discharge pipe; 13-bottom sludge discharge pipe.
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.
Example 1
As shown in FIG. 1, a carrier filter comprises a housing 1, a suspended carrier bed 7, a sludge buffer zone 5 and a sludge layer 4 which are arranged in the housing 1; a water distribution system 3 is arranged in the sludge layer 4, the water distribution system 3 is connected with one end of the water inlet pipe 2, and the other end of the water inlet pipe 2 extends out of the shell 1; the sludge buffer zone 5 is arranged between the sludge layer 4 and the suspension carrier bed 7, the suspension carrier bed 7 is separated from the sludge buffer zone 5 by a support screen 6, a water outlet interception screen 8 is also arranged above the suspension carrier bed 7, the water outlet interception screen 8 is also communicated with a water collection tank 9, and the water collection tank 9 is positioned above the suspension carrier bed 7 and is communicated with the shell 1; the shell 1 is also provided with a water outlet pipe 10, a backwashing air pipe 11, a middle sludge discharge pipe 12 and a bottom sludge discharge pipe 13.
Particularly, the water outlet pipe 10 is communicated with the lower part of the water collecting tank 9, the backwashing air pipe 11 is communicated with the lower part of the suspended carrier bed 7, the middle sludge discharge pipe 12 and the bottom sludge discharge pipe 13 are respectively arranged at the upper part and the lower part of the sludge layer 4, and the sludge level of the sludge layer 4 is regulated and controlled through the middle sludge discharge pipe 12.
Particularly, control valves are respectively arranged on the water outlet pipe 10, the backwashing air pipe 11, the middle sludge discharge pipe 12 and the bottom sludge discharge pipe 13 and are respectively used for controlling the opening and closing of the pipeline.
Particularly, the backwashing air pipes are uniformly arranged at the lower part of the suspension carrier bed, and the aeration mode is perforated pipe aeration, so that the filler in the suspension carrier bed is uniformly turned over.
In particular, the water distribution system 3 is a conical water distributor.
In particular, the height of the suspension carrier bed 7 is 0.8m, the height of the sludge buffer zone 5 is 0.6m, the height of the sludge blanket 4 is 0.6m, and the nitrate nitrogen carried in the inlet water can generate endogenous denitrification after passing through the sludge blanket 4 with a certain thickness so as to reduce the total nitrogen of the outlet water.
In particular, the suspension carrier bed 7 is filled with suspension carriers, the suspension carriers are columnar, the suspension carriers are made of HDPE, and the diameter of the suspension carriers is 25 mm; the addition of the suspension carrier can shorten the settling distance of sludge flocs, so that small sludge flocs can be intercepted; meanwhile, the movement of the sludge flocs in the suspension carrier bed 7 belongs to dynamic separation, and mutual collision among the sludge flocs is strengthened, so that small sludge flocs are condensed into large sludge flocs and are trapped in the suspension carrier bed 7.
In particular, the support screen 6 is a flat screen, and the opening size of the support screen 6 is 18 mm.
Specifically, the outlet water intercepting screen 8 is a drum screen, and the size of the opening of the outlet water intercepting screen 8 is 18 mm.
The working process of the carrier filter comprises normal operation, backwashing and sludge discharge, wherein:
(1) normal operation process
The backwashing air pipe 11 is closed, sewage enters the carrier filter from the water inlet pipe 2, the inlet water is uniformly distributed at the bottom of the carrier filter under the action of the water distribution system 3, most sludge flocs are intercepted in the sludge layer 4, a small amount of sludge flocs pass through the sludge layer 4 with a certain height to reach the sludge buffer zone 5, and partial sludge flocs are mutually flocculated or combined in the sludge buffer zone 5 and then are settled in the sludge layer 4 again; a very small amount of small sludge flocs can upwards enter a suspension carrier bed 7 and are further treated by a suspension carrier; the supernatant passes through the water outlet interception screen mesh 8 and then is collected into the water collection tank 9, and finally is discharged out of the carrier filter through the water outlet pipe 10.
(2) Backwash process
The inlet water continuously enters the carrier filter, the water outlet pipe 10 is closed, and the backwashing air pipe 11 is opened; after the backwashing process is finished, the water outlet pipe 10 is opened, the backwashing air pipe 11 is closed, and the backwashing turbid liquid is discharged out of the system.
(3) Sludge discharge process
The middle sludge discharge pipe 12 and the bottom sludge discharge pipe 13 are periodically opened to maintain the stability of the height of the sludge layer 4 in the carrier filter.
The utility model, through arranging the water distribution system 3 in the sludge layer 4, the sludge flocs in the inlet water and the bottom sludge layer 4 generate micro flocculation, so as to remove most of the sludge flocs, reduce the operation load of the suspension carrier bed 7 and prolong the backwashing period of the suspension carrier bed 7; the suspension carrier is added into the suspension carrier bed 7 to further remove fine sludge flocs and ensure the quality of effluent.
The utility model discloses possess high-efficient integrated sediment and filtering capability, have that solid-liquid separation is efficient, the technology integrated level is high, go out water effectual, the operation is stable, take up an area of advantage such as economize, be particularly useful for the sediment filtration equipment among the middle-size and small-size sewage treatment project.
Example 2
The difference from example 1 is that:
the water distribution system 3 adopts a flat plate hole type water distributor;
the height of the suspension carrier bed 7 is 0.4m, the height of the sludge buffer zone 5 is 0.3m, and the height of the sludge layer 4 is 0.5 m;
the suspension carrier bed 7 is filled with suspension carriers, the suspension carriers are spherical, the suspension carriers are made of PP, and the diameter of the suspension carriers is 10 mm;
the support screen 6 is a flat screen, and the size of an opening of the support screen 6 is 8 mm;
the above-mentioned effluent interception screen mesh 8 is a flat screen mesh, and the size of the opening of the effluent interception screen mesh 8 is 8 mm.
Example 3
The difference from example 1 is that:
the water distribution system adopts a perforated pipe type water distributor;
the height of the suspension carrier bed is 1.5m, the height of the sludge buffer zone is 0.7m, and the height of the sludge layer is 1.2 m;
the suspension carrier bed is filled with suspension carriers, the suspension carriers are spherical, and the suspension carriers are made of PP with the diameter of 38 mm;
the supporting screen is a flat screen, and the size of an opening of the supporting screen is 20 mm;
the water outlet interception screen is a roller screen, and the size of an opening of the water outlet interception screen is 20 mm.
Examples
The carrier filter is applied to a sewage treatment station in a certain village and town.
The process comprises the following steps: a/O (pure membrane MBBR process) + carrier filter;
the designed treatment capacity of the carrier filter was 200m3D, the actual surface load can reach 1.7m3/(m2·h)。
After the effluent SS of the aerobic pure membrane MBBR tank is filtered by the carrier filter, the effluent SS can stably reach the first-level A discharge standard, and the measured SS of the effluent SS of the aerobic pure membrane MBBR tank is 70-120 mg/L, and the SS of the effluent SS of the carrier filter is 7.5-9.4 mg/L.
Compared with the traditional combined process of the secondary sedimentation tank and the sand filtration tank, the following advantages are that:
(1) the energy consumption is obviously reduced
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: a secondary sedimentation tank mud scraper is required: n is 0.37kW, and the running time is 24 h; need sand filtration intake pump: q is 10m3/h，H＝15m3H, N ═ 1.5kW, run time: 18 h; a sand filtration backwashing pump: q is 40m3/h，H＝15m3H, N ═ 4kW, run time: for 10 min.
The carrier filter is adopted: the device is not needed, and meanwhile, the device is not newly added.
(2) Clean water-free pool
Adopts the traditional combined process of 'secondary sedimentation tank and sand filtering tank', the clear water tank is counted according to HRT (high resolution) for 0.5h, the effective height is counted according to 2m, the occupation area of the clear water tank is 200/24 × 0.5.5/2-2.08 m2。
The carrier filter is adopted: the backwashing process can be completed only by utilizing the inflow water of the gravity flow because the backwashing process does not need to additionally increase the strength of the backwashing water; therefore, a clean water tank is not required. Not only reduces the occupied area, but also saves the manufacturing cost of the clean water tank.
(3) Land occupation saving
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: surface load of secondary sedimentation tank is 0.7m3/(m2H) meter, the secondary sedimentation tank occupies 200/24/0.7-11.9 m of land2(ii) a Sand filter tank adopts
Glass fibre reinforced plastic jar and sand filtering jar occupying 3.14 × (1.2/2)2＝1.13m2(ii) a The occupation area of the clean water pool is 2.08m2(ii) a Total occupied land: 15.11m2。
The carrier filter is adopted: surface load at 1.7m3/(m2H) the carrier filter occupies 200/24/1.7-4.9 m2。
And the occupied area of the carrier filter is only 32.33 percent of that of the combined process of the secondary sedimentation tank and the sand filtering tank.
(4) Low water consumption
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: the backwashing period of the sand filter tank is 1d, and the backwashing water strength of the sand filter tank is 10L/(m)2S), backwash time of 10min, backwash water amount of 10 × 3.14.14 3.14 × (1.2/2)2/3600/1000×10/60＝6.78m3/d。
The carrier filter is adopted: the backwashing period is 2d, the carrier filter is filled with water to obtain backwashing water, and the backwashing strength is 1.7m3/(m2H) the backwashing time is 12min, and the water consumption is 200/24/60 × 12/2-0.84 m3/d。
And the backwashing water quantity of the carrier filter is only 12.4 percent of that of the combined process of the secondary sedimentation tank and the sand filtering tank.
(5) The filter material has long service life
The traditional combined process of the secondary sedimentation tank and the sand filter tank is adopted: the filter material of the sand filter tank is quartz sand, hardening or loss is easy to occur due to reasons such as incomplete backwashing and the like, and the filter material replacement time is usually 3-8 years.
The carrier filter is adopted: the filter material is a suspension carrier, and the service life is longer than or equal to 15 years.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (9)
1. The carrier filter is characterized by comprising a shell, a suspended carrier bed, a sludge buffer zone and a sludge layer, wherein the suspended carrier bed, the sludge buffer zone and the sludge layer are arranged in the shell; a water distribution system is arranged in the sludge layer and is connected with one end of a water inlet pipe, and the other end of the water inlet pipe extends out of the shell; the sludge buffer zone is arranged between the sludge layer and the suspension carrier bed, the suspension carrier bed is separated from the sludge buffer zone by a support screen, a water outlet interception screen is also arranged above the suspension carrier bed, and the water outlet interception screen is also communicated with the water collecting tank; the water collecting tank is positioned above the suspension carrier bed and communicated with the shell; the shell is also provided with a water outlet pipe, a backwashing air pipe, a middle sludge discharge pipe and a bottom sludge discharge pipe.
2. The carrier filter of claim 1, wherein the water outlet pipe is communicated with the lower part of the water collecting tank, the backwashing air pipe is communicated with the lower part of the suspended carrier bed, the middle sludge discharge pipe and the bottom sludge discharge pipe are respectively arranged at the upper part and the lower part of the sludge blanket, and the sludge level of the sludge blanket is regulated and controlled through the middle sludge discharge pipe.
3. The carrier filter of claim 2 wherein control valves are mounted on the outlet pipe, backwash air duct, middle sludge discharge duct and bottom sludge discharge duct, respectively.
4. A carrier filter as claimed in claim 3 wherein the backwash duct is uniformly arranged below the suspended carrier bed in the form of perforated tube aeration.
5. The carrier filter of claim 1 wherein the water distribution system is selected from the group consisting of a conical distributor, a flat-cell distributor, and a perforated tubular distributor.
6. The carrier filter of claim 2, wherein the height of the suspension carrier bed is 0.4 to 1.5m, the height of the sludge buffer zone is 0.3 to 0.7m, and the height of the sludge blanket is 0.5 to 1.2 m.
7. The carrier filter of claim 6, wherein the suspension carrier bed is filled with suspension carriers, the suspension carriers are at least one of cylindrical, spherical and rectangular, the suspension carriers are made of at least one of HDPE, PE, PUR, PP and PU, and the diameter or side length of the suspension carriers is 10-40 mm.
8. The carrier filter of claim 1 wherein the support screen is a flat screen and the support screen has openings of 8 to 20mm in size.
9. The carrier filter of claim 1, wherein the outlet water intercepting screen is a flat screen or a drum screen, and the size of the opening of the outlet water intercepting screen is 8-20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921723752.5U CN210905273U (en) | 2019-10-15 | 2019-10-15 | Carrier filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921723752.5U CN210905273U (en) | 2019-10-15 | 2019-10-15 | Carrier filter |
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| CN210905273U true CN210905273U (en) | 2020-07-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110585794A (en) * | 2019-10-15 | 2019-12-20 | 青岛思普润水处理股份有限公司 | Carrier filter and application thereof in sewage treatment |
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- 2019-10-15 CN CN201921723752.5U patent/CN210905273U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110585794A (en) * | 2019-10-15 | 2019-12-20 | 青岛思普润水处理股份有限公司 | Carrier filter and application thereof in sewage treatment |
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