CN210795915U - Umbrella-shaped denitrification biological filter suitable for light filter material - Google Patents
Umbrella-shaped denitrification biological filter suitable for light filter material Download PDFInfo
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- CN210795915U CN210795915U CN201921996375.2U CN201921996375U CN210795915U CN 210795915 U CN210795915 U CN 210795915U CN 201921996375 U CN201921996375 U CN 201921996375U CN 210795915 U CN210795915 U CN 210795915U
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Abstract
The utility model discloses an umbelliform denitrification biological filter suitable for light filter material, including filtering pond body, light filter material layer, the light filter material layer set up in the middle part of filtering pond body, the light filter material layer with the bottom of filtering pond body forms the buffering and joins in marriage the water district, the light filter material layer with the top of filtering pond body forms clear water district, sewage inlet tube, back flush intake pipe, back flush mud pipe with the buffering is joined in marriage water district intercommunication, clear water outlet pipe, back flush inlet tube with clear water district intercommunication, the light filter material layer includes upper filter plate, lower floor's filter plate and filter material, the filter material fill in the upper filter plate with between the filter plate of lower floor, the upper filter plate is umbelliform, the upper filter plate all be equipped with the filter head on the filter plate of lower floor. The utility model has the advantages of good filtering effect, low back washing requirement, no blockage, no short flow, convenient management and the like.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, concretely relates to umbelliform denitrification biological filter suitable for light filter material.
Background
At present, a down-flow filter tank is generally adopted in a biological filter tank, when inlet water flows through a filter material layer from top to bottom, suspended particles with particle sizes larger than gaps of the filter material layer are firstly intercepted in a filter material at the top layer, so that the gaps of the filter material at the top layer are smaller and smaller, and a filter membrane formed by intercepted objects is gradually formed. The filter resistance of the filter tank is gradually increased in the using process due to the filter membrane, and the filter tank is blocked seriously, so that the function of the filter material at the middle and lower layers can not be fully exerted, the treatment efficiency is reduced, and the backwashing working frequency and strength are increased. Meanwhile, when downward flow filtration is carried out, along with more and more impurities intercepted in the filter layer, the water head loss of water flow flowing through the filter layer can be gradually increased, and when the water head loss at a certain depth below the filter material surface exceeds the water depth at the certain depth, the negative pressure phenomenon can occur. In the negative pressure area, the gas dissolved in water can be released continuously, thereby reducing the effective filtering area and increasing the local resistance of the filtering layer.
The existing water distribution system of the upward flow light filter material filter tank has large resistance during filtering and backwashing, uneven water distribution, more dead water areas, easy hardening and mud accumulation of filter materials, increased backwashing difficulty, and unfavorable consequences of filter material loss and the like due to loosening of a supporting layer caused by local washing strength.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides an umbelliform denitrification biological filter suitable for light filter material, the utility model discloses can increase the area of contact between pending sewage, backwash water and the filter material, increase the area of contact between backwash water and the filter material, be favorable to improving the water yield of denitrification biological filter and reduce the energy consumption of backwash to the running cost has been reduced.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an umbrella-shaped denitrification biological filter suitable for light filter materials, which comprises a filter body, a light filter material layer, a sewage inlet pipe, a clear water outlet pipe, a back flush inlet pipe and a back flush mud pipe, wherein the light filter material layer is arranged in the middle of the filter body, the light filter material layer and the bottom of the filter body form a buffering water distribution area, the light filter material layer and the top of the filter body form a clear water area, the sewage inlet pipe, the back flush mud pipe and the buffering water distribution area are communicated, the clear water outlet pipe, the back flush inlet pipe and the clear water area are communicated, the light filter material layer comprises an upper filter plate, a lower filter plate and filter materials, the filter materials are filled between the upper filter plate and the lower filter plate, and the upper filter plate is umbrella-shaped, and the upper layer filter plate and the lower layer filter plate are respectively provided with a filter head.
As the optimized technical scheme, the upper filter plate comprises 1 rectangular filter plate and 4 trapezoidal filter plates, the rectangular filter plates are horizontally laid, the 4 trapezoidal filter plates are symmetrically laid on the periphery of the rectangular filter plates, and the included angle between each trapezoidal filter plate and the horizontal direction is 15-30 degrees.
As a preferred technical scheme, the rectangular filter plate and the trapezoidal filter plate are respectively provided with filter heads every 100 millimeters along the transverse direction and the longitudinal direction.
As a preferred technical scheme, the filter head comprises a filter cap and a water inlet which are communicated, the filter cap is arranged on one side, close to the filter material, of the upper-layer filter plate or the lower-layer filter plate, the water inlet is arranged on one side, far away from the filter material, of the upper-layer filter plate or the lower-layer filter plate, and the filter head is provided with a plurality of water flow channels along the circumferential direction.
As a preferred technical scheme, the filter material is a polystyrene light filter material with the particle size of 3-5 mm.
As the preferred technical scheme, the filter body, the upper layer filter plate and the lower layer filter plate are all made of stainless steel.
The device adopts a top-down cleaning mode during reverse cleaning, a reverse-cleaning water inlet pipe is arranged above the upper-layer filter plate, and a reverse-cleaning air inlet pipe and a reverse-cleaning sludge discharge pipe are arranged below the lower-layer filter plate.
The back washing process comprises the following procedures:
the method comprises the following steps: in the liquid level lowering stage, the water inlet valve is closed, the liquid level lowering valve is opened, and the liquid level of the filter tank is lowered by 1-1.5 m;
step two: in the air washing stage, a back washing air inlet valve is opened, a back washing fan is started to carry out air washing, the purpose is to loosen a filter material layer and expand the filter material, and the air washing strength is 20-25L/(square meter per second);
step three: air-water combined backwashing, wherein a backwashing water inlet valve is opened, a backwashing water pump is started, and air-water combined backwashing is carried out, so that suspended matters and aged microorganisms trapped on filter materials are washed away, and the backwashing washing strength is 6-8 liters/(square meter per second);
step four: and (4) rinsing with water, namely closing the backwashing fan and the backwashing air inlet valve to rinse with water, so as to wash out suspended matters and aged microbial membranes on the surface of the filter material.
Compared with the prior art, the beneficial effects of the utility model are that: the middle and upper filter plates are laid in an umbrella shape, after water is supplied, light elastic filter material particles are densely distributed below the upper filter plate through the buoyancy of the water to form a filter layer, the upper filter plate laid in the umbrella shape increases the contact area between the sewage to be treated and the filter material, and the treatment effect is improved; during back washing, the upper filter plate laid in an umbrella shape increases the contact area between the back washing water and the filter material, reduces the water consumption of the back washing and shortens the back washing time. The utility model has the advantages of good filtering effect, low back washing requirement, no blockage, no short flow, convenient management and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the denitrification biological filter of the present invention.
FIG. 2 is a schematic structural diagram of the upper filter plate in the denitrification biological filter of the present invention.
FIG. 3 is a schematic structural diagram of a filter head in the denitrification biological filter of the present invention.
Wherein the reference numerals are specified as follows: the filter comprises a filter body 1, a clear water area 2, a buffering water distribution area 3, a light filter material layer 4, an upper filter plate 5, a lower filter plate 6, a sewage inlet pipe 7, a clear water outlet pipe 8, a backwashing water inlet pipe 9, a backwashing air inlet pipe 10, a backwashing sludge discharge pipe 11, a filter head 12, a filter cap 13, a water inlet 14, a water flow channel 15, a rectangular filter plate 16 and a trapezoidal filter plate 17.
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 any creative effort belong to the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides a folded plate denitrification biological filter suitable for light filter materials, which includes a filter body 1, a light filter material layer 4, a sewage inlet pipe 7, a clean water outlet pipe 8, a backwash inlet pipe 9, a backwash inlet pipe 10, and a backwash sludge discharge pipe 11. The filter body 1 is made of stainless steel material, the length and width of the filter body 1 are both 800 mm, the height is 6.5 m, and the treatment scale is 80 cubic meters per day. The light filter material layer 4 is arranged in the middle of the filter body 1, the thickness of the light filter material layer 4 is 2.3 m, the light filter material layer 4 and the bottom of the filter body 1 form a buffering water distribution area 3, and the light filter material layer 4 and the top of the filter body 1 form a clear water area 2. The light filter material layer 4 comprises an upper filter plate 5, a lower filter plate 6 and filter materials, wherein the filter materials are filled between the upper filter plate 5 and the lower filter plate 6, and the filter materials are polystyrene light filter materials with the particle size of 3-5 mm. As shown in fig. 2, the upper filter plate 5 has an outer side length and a width of 900 mm, and a rectangular filter plate 16, which is square in this embodiment, is arranged in the center, and the rectangular filter plate 16 is laid horizontally with a side length of 300 mm; four trapezoidal filter plates 17 are symmetrically laid, the included angle between the four trapezoidal filter plates 17 and the horizontal direction is 20 degrees, and circular holes with the diameter of 34 millimeters are preset in the rectangular filter plates 16 and the trapezoidal filter plates 17 along the longitudinal direction and the transverse direction at intervals of 100 millimeters and are used for installing the filter heads 12. The upper filter plate 5 is made of stainless steel, and the tensile strength of the upper filter plate 5 is greater than 140 MPa, the compressive strength is greater than 140 MPa, and the impact strength is greater than 140 MPa. As shown in fig. 3, the filter head 12 is made of ABS, its tensile strength is 21-28 mpa, rockwell hardness is 62-86, the filter head 12 includes a filter cap 13 and a water inlet 14 which are communicated, the filter cap 13 is disposed on one side of the filter plate close to the filter material, the water inlet 14 is disposed on one side of the filter plate far from the filter material, the filter head 12 is circumferentially disposed with 40 water flow channels 15, the gap area of the water flow channel 15 is 40 square millimeters, and the water output of a single filter head 12 can reach 1 ton/hr.
The bottom bearing structure of the light filter material layer 4 is supported by stainless steel pillars and stainless steel bearing beams which connect the pool bottom and the pool wall, and the stainless steel pillars and the stainless steel bearing beams are all made of profile steel. In the newly-built filter tank engineering, a stainless steel bearing structure can be welded with embedded parts embedded at the bottom and the wall of the tank or connected and fixed with embedded bolts; in original filtering pond transformation engineering, accessible bar planting mode is arranged fixing bolt in bottom of the pool and pool wall, then fixed with stainless steel support column, carrier bar, makes stainless steel filter plate bearing structure and filtering pond civil engineering structure even as an organic whole, to the filtering pond of having concrete filter beam structure, also can utilize original concrete support beam to be installed on practicalities.
The following is a specific implementation method of the denitrification biofilter in the embodiment:
and taking the effluent of the secondary sedimentation tank of a certain domestic sewage plant for testing. The water quality of the test inlet water is that the total nitrogen concentration is 9.8-24.4 mg/L, and the average concentration is 18.4 mg/L; the concentration of nitrate nitrogen is 7.3-20.1 mg/L, and the average concentration is 13.3 mg/L. The test adopts upward inflow water, and after the operation is stable, the average removal rates of the total nitrogen and the nitrate nitrogen are respectively 80.4 percent and 82.0 percent; the back washing period is 3 days, the back washing water consumption is 0.15-0.28% of the treated water amount, the back washing air washing strength is 20-25L/(square meter second), the back washing water washing strength is 6-8L/(square meter second), and the air washing, air water combined back washing and water rinsing time are 2 minutes. Therefore, the folded plate denitrification biofilter suitable for the light filter material has the advantages of high removal rate of total nitrogen and nitrate nitrogen, low water consumption for backwashing, short backwashing time, reduced backwashing energy consumption and improved water yield of the denitrification biofilter, thereby reducing the operation cost and having good environmental and economic benefits.
The upper filter plate 5 in the biological filter is laid in an umbrella shape, so that the contact area between the sewage to be treated and the filter material is increased, the filter material can be fully utilized in the filtering process, fine suspended matters, organic pollutants and microorganisms can be effectively intercepted, the filter membrane is formed quickly, and the treatment effect can be effectively improved; during back flushing, the contact area between back flushing water and the filter material is increased, the back flushing water consumption is reduced, the back flushing time is shortened, the back flushing energy consumption is reduced, the water yield of the denitrification biological filter is improved, and the operation cost is reduced. In addition, the filter plate with the filter heads 12 uniformly assembled is used for filtering and back flushing water distribution, compared with the traditional filter tank water distribution system, the water distribution is more uniform, a dead water area cannot be formed, the filter material can be effectively prevented from flowing outwards, the water yield of a single filter head 12 can reach 1 ton/hour, and the flow of the filter tank can be effectively ensured.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention can be made without departing from the spirit and scope of the present invention, and these modifications and improvements are within the spirit and scope of the present invention.
Claims (6)
1. An umbrella-shaped denitrification biological filter suitable for light filter materials is characterized by comprising a filter body (1), a light filter material layer (4), a sewage inlet pipe (7), a clear water outlet pipe (8), a backwashing water inlet pipe (9), a backwashing air inlet pipe (10) and a backwashing sludge discharge pipe (11), wherein the light filter material layer (4) is arranged in the middle of the filter body (1), the light filter material layer (4) and the bottom of the filter body (1) form a buffering water distribution area (3), the light filter material layer (4) and the top of the filter body (1) form a clear water area (2), the sewage inlet pipe (7), the backwashing air inlet pipe (10) and the backwashing sludge discharge pipe (11) are communicated with the buffering water distribution area (3), the clear water outlet pipe (8) and the backwashing water inlet pipe (9) are communicated with the clear water area (2), the light filter material layer (4) comprises an upper filter plate (5), a lower filter plate (6) and filter materials, wherein the filter materials are filled between the upper filter plate (5) and the lower filter plate (6), the upper filter plate (5) is umbrella-shaped, and filter heads (12) are arranged on the upper filter plate (5) and the lower filter plate (6).
2. The umbrella-shaped denitrification biological filter suitable for the light filter materials as claimed in claim 1, wherein the upper filter plate (5) comprises 1 rectangular filter plate (16) and 4 trapezoidal filter plates (17), the rectangular filter plates (16) are horizontally laid, 4 trapezoidal filter plates (17) are symmetrically laid around the rectangular filter plates (16), and the included angle between the trapezoidal filter plates (17) and the horizontal direction is 15-30 degrees.
3. The umbrella-shaped denitrification biofilter suitable for light filter materials according to claim 2, wherein the rectangular filter plate (16) and the trapezoidal filter plate (17) are respectively provided with filter heads (12) every 100 mm along the transverse direction and the longitudinal direction.
4. The umbrella-shaped denitrification biofilter suitable for light filter materials according to claim 1, wherein the filter head (12) comprises a filter cap (13) and a water inlet (14) which are arranged in a communicating manner, the filter cap (13) is arranged on one side of the upper filter plate (5) or the lower filter plate (6) close to the filter materials, the water inlet (14) is arranged on one side of the upper filter plate (5) or the lower filter plate (6) far away from the filter materials, and the filter head (12) is circumferentially provided with a plurality of water flow channels (15).
5. The umbrella-shaped denitrification biofilter suitable for light filter materials according to claim 1, wherein the filter materials are polystyrene light filter materials with the particle size of 3-5 mm.
6. The umbrella-shaped denitrification biological filter suitable for the light filter material as claimed in claim 1, wherein the filter body (1), the upper filter plate (5) and the lower filter plate (6) are all made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921996375.2U CN210795915U (en) | 2019-11-19 | 2019-11-19 | Umbrella-shaped denitrification biological filter suitable for light filter material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921996375.2U CN210795915U (en) | 2019-11-19 | 2019-11-19 | Umbrella-shaped denitrification biological filter suitable for light filter material |
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| Publication Number | Publication Date |
|---|---|
| CN210795915U true CN210795915U (en) | 2020-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921996375.2U Active CN210795915U (en) | 2019-11-19 | 2019-11-19 | Umbrella-shaped denitrification biological filter suitable for light filter material |
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| Country | Link |
|---|---|
| CN (1) | CN210795915U (en) |
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- 2019-11-19 CN CN201921996375.2U patent/CN210795915U/en active Active
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