CN212369642U - Two-section contact flocculation filter - Google Patents
Two-section contact flocculation filter Download PDFInfo
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- CN212369642U CN212369642U CN202021895681.XU CN202021895681U CN212369642U CN 212369642 U CN212369642 U CN 212369642U CN 202021895681 U CN202021895681 U CN 202021895681U CN 212369642 U CN212369642 U CN 212369642U
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Abstract
The utility model discloses a two segmentation contact flocculation filters. Consists of an upper cover plate, a shell and a lower cover plate; the middle part of the shell is provided with a separation plate, the plate is provided with an upper water cap, the lower part of the shell is provided with a support plate, and the plate is provided with a lower water cap; an upper pipe opening is introduced into the upper part of the shell, an upward bell mouth is arranged at one end inside the shell, one end outside the shell is connected with a water inlet valve and a back flush water outlet valve, an air inlet pipeline opening is arranged on the side surface of the lower cover plate, a back flush air inlet valve is connected with an inlet of the air inlet pipeline opening, and a lower pipe opening on the end surface of the lower cover plate is connected with the back flush water inlet valve and the water outlet valve; the upper manhole and the middle manhole on the side surface of the shell are respectively positioned on two sides of the isolation plate, and the lower manhole is positioned on the upper side of the supporting plate. An upper layer and a lower layer of filter materials with different particle sizes are isolated by using an isolation plate and a water cap, and the structure of the filter material layer is kept stable in the back washing process; the upper and lower filter materials can be made of quartz sand, so that the problem that the light filter material in the traditional double-layer filter material is broken and lost is solved; it is suitable for the purification treatment of tap water, domestic sewage and the like.
Description
Technical Field
The utility model relates to a water treatment purifier especially relates to a two segmentation contact flocculation filters.
Background
The concentration of impurity particles in low-turbidity water is low, the impurity particles mainly exist in the forms of fine suspended particles and colloid, the sedimentation speed in water is very slow, and the low-turbidity water has very strong dynamic stability and coagulation stability. The contact flocculation technology has a good treatment effect on such water bodies, a sedimentation tank and a flocculation tank are omitted, raw water after the medicament is added is directly introduced into the filter through a tubular mixer, the contact flocculation effect of the filter material layer is fully exerted, the filter has the effects of coagulation, sedimentation and filtration, and the filtering capacity of the filter is effectively improved.
The structure of the filter material layer is an important factor influencing the filtering effect, and the double-layer filter material structure is mainly adopted in the current practical production. The upper layer of the double-layer filter material structure is a light filter material with large particle size, and the lower layer of the double-layer filter material structure is a heavy filter material with small particle size, so that the particle size of the filter material is gradually reduced from large to small along the direction of filtering water flow, and the filtering capacity of the filter material layer can be fully exerted. However, in the actual operation process, the situation that a filter material mixing layer at a filter material interface or even a filter material messy layer appears after the filter material layer is backflushed for a long time, the original design purpose is lost, and the filtering capacity of the filter material layer is reduced; in addition, the light filter material is usually anthracite, the mechanical strength is low, and the light filter material is easy to break and run off under the action of a backwashing fluid in the backwashing process, so that the dirt intercepting performance of the filter material layer is reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem that double-deck filter material appears at the operation in-process among the technical background, the utility model aims to provide a two segmentation contact flocculation filter to solve double-deck filter material filter light filter material easy broken loss, interface filter material mixing layer and the indiscriminate layer problem of filter material in actual operation, realize double-deck filter material filter's long-term steady operation.
The utility model adopts the technical proposal that:
the utility model relates to a two-section contact flocculation filter, which comprises an upper cover plate, a shell and a lower cover plate; the middle part of the shell is provided with a separation plate which plays a role in supporting the upper-layer filter material, the upper end surface of the separation plate is provided with a plurality of upper water caps, the lower part of the shell is provided with a support plate which plays a role in supporting the lower-layer filter material, and the upper end surface of the support plate is provided with a plurality of lower water caps; an upper pipe opening is introduced into the upper part of the shell, an upward bell mouth is arranged at one end of the upper pipe opening in the shell, one end of the upper pipe opening outside the shell is respectively connected with a water inlet valve and a back flush water outlet valve, an air inlet pipeline opening is arranged on the side surface of the lower cover plate, a back flush air inlet valve is connected with an inlet of the air inlet pipeline opening, and a lower pipe opening on the end surface of the lower cover plate is respectively connected with the back flush water inlet; the side face of the shell is provided with an upper manhole, a middle manhole and a lower manhole, the upper manhole and the middle manhole are respectively positioned on the upper side and the lower side of the isolation plate, and the lower manhole is positioned on the upper side of the supporting plate.
The isolating plate is provided with a plurality of inner screw holes, and a plurality of water feeding caps are fixed on the isolating plate through outer screwed joints respectively.
The supporting plate is provided with a plurality of inner screw holes, and a plurality of water feeding caps are fixed on the supporting plate through outer screwed joints respectively.
The upper layer filter material is coarse quartz sand with the grain diameter of 0.6-1.0 mm.
The lower layer filter material is fine quartz sand with the grain diameter of 0.5-0.6 mm.
The utility model has the advantages that:
1) an upper layer and a lower layer of filter materials with different particle sizes are isolated by using an isolation plate and a water cap, and the structure of the filter material layer is kept stable in the back washing process;
2) the upper and lower filter materials can be made of quartz sand, so that the problem that the light filter material in the traditional double-layer filter material is broken and lost is solved;
the utility model is suitable for the purification treatment of tap water, domestic sewage and the like.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
In the figure: 1. the device comprises an upper cover plate, 2, a water inlet valve, 3, a bell mouth, 4, an upper pipe opening, 5, upper filtering materials, 6, a back-flushing water outlet valve, 7, a shell, 8, an upper manhole, 9, an upper water cap, 10, a partition plate, 11, a middle manhole, 12, lower filtering materials, 13, a lower manhole, 14, a lower water cap, 15, a supporting plate, 16, an air inlet pipe opening, 17, a back-flushing air inlet valve, 18, a lower cover plate, 19, a lower pipe opening, 20, a back-flushing water inlet valve, 21 and a water outlet valve.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, the two-section contact flocculation filter of the present invention comprises an upper cover plate 1, a housing 7 and a lower cover plate 18; the middle part of the shell 7 is provided with a separation plate 10 which plays a role of supporting the upper-layer filter material 5, and the upper end surface of the separation plate 10 is provided with a plurality of water feeding caps 9 which only allow water flow to pass through so as to prevent the double-layer filter material from contacting; the lower part of the shell 7 is provided with a supporting plate 15 which plays a role of supporting the lower layer of filter material 12, and the upper end surface of the supporting plate 15 is provided with a plurality of water discharging caps 14 to prevent the filter material from losing; an upper pipe opening 4 is introduced into the upper part of the shell 7, an upward bell mouth 3 is arranged at one end of the upper pipe opening 4 in the shell 7, one end of the upper pipe opening 4 outside the shell 7 is respectively connected with a water inlet valve 2 and a back flush water outlet valve 6, an air inlet pipe opening 16 is arranged on the side surface of a lower cover plate 18, a back flush air inlet valve 17 is connected with the inlet of the air inlet pipe opening 16, and a lower pipe opening 19 on the end surface of the lower cover plate 18 is respectively connected with a back flush water inlet valve; an upper manhole 8, a middle manhole 11 and a lower manhole 13 are arranged on the side surface of the shell 7, the upper manhole 8 and the middle manhole 11 are respectively positioned on the upper side and the lower side of the isolation plate 10, and the lower manhole 13 is positioned on the upper side of the supporting plate 15; the upper manhole 11 is convenient for installing and replacing the upper water cap 9, the middle manhole 11 is convenient for filling the lower layer filter material 12, and the lower manhole 13 is convenient for installing and replacing the lower water cap 14.
An upper pipe opening 4 is arranged at the upper part of the shell 7, a bell mouth 3 is arranged at the upper pipe opening 4 along one end of a pipeline inside the shell 7, a lower pipe opening 19 is arranged at the lower end of a lower cover plate 18, and water flow enters and exits the filter through the upper pipe opening and the lower pipe opening; the lower part of the shell 7 is provided with an air inlet pipe opening 16, and the back flush airflow enters the filter through the air inlet pipe opening 16. Raw water and a flocculating agent are mixed and then enter the filter from the upper end, destabilizing particles in the raw water fully contact with the filter material, collide and adhere to the filter material, and are retained in the filter layer, so that water flow can meet the water outlet standard when reaching a water outlet below. When the filtering stage is finished, the filter enters a back flushing stage, the filter adopts a gas-water combined back flushing mode, so that compressed air and water flow pass through the filter from bottom to top, and impurity particles adsorbed and intercepted by the filter material fall off and are brought out of the filter material layer by utilizing the action of fluid shearing force and rolling friction among the particles, thereby recovering the interception capability of the filter material layer. The upper and lower two kinds of filter materials of the filter can adopt quartz sand, the problem that the light filter material is easy to break and run off in the traditional double-layer filter material is solved, and in addition, the problem that the interface filter material mixing layer and the filter material are disordered in the backwashing process is avoided due to the existence of the isolation plate.
A plurality of inner screw holes are formed in the isolation plate 10, and a plurality of water feeding caps 9 are fixed on the isolation plate 10 through outer screwed joints respectively.
A plurality of inner screw holes are formed in the supporting plate 15, and a plurality of lower water caps 14 are fixed to the supporting plate 15 through outer screw joints respectively.
The upper-layer filter material 5 is coarse quartz sand with the particle size of 0.6-1.0 mm.
The lower layer filter material 12 is fine quartz sand with the grain diameter of 0.5-0.6 mm.
The upper water caps 9 on the upper end surface of the partition plate 10 and the lower water caps 14 on the upper end surface of the support plate 15 can be arranged on the respective plates in concentric circles at equal intervals or in non-equal intervals, and the diameters, the numbers and the arrangement of the upper water caps 9 and the lower water caps 14 are determined by the design requirements.
The operation process of the utility model is two steps of alternate operation of a filtering stage and a back washing stage;
1) and (3) a filtering stage: raw water and a flocculating agent are mixed and then enter the filter from an upper pipe opening 4 through a water inlet valve 2, the inlet water sequentially passes through an upper layer filter material 5, an upper water cap 9, a lower layer filter material 12 and a lower water cap 14 from top to bottom, destabilizing particles in the raw water are fully contacted, collided and adhered with the filter material so as to be intercepted in the filter layer, so that the water flow can meet the water outlet standard when reaching a lower water outlet, and finally the water flow is discharged from a water outlet valve 21 through a lower pipe opening 19.
2) A backwashing stage: along with the increase of the interception amount in the filter layer, the head loss is correspondingly increased, the effluent quality is poor, at the moment, the filtration needs to be stopped, and the filter is backwashed. The system adopts gas-water combined backwashing, compressed air enters the filter from an air inlet pipeline port 16 through a backwashing air inlet valve 17, and backwashing water enters the filter from a lower pipeline port 19 through a backwashing water inlet valve 20; the fluid passes through the lower water cap 14, the lower layer filter material 12, the upper water cap 9 and the upper layer filter material 5 from bottom to top in sequence, and under the action of fluid shearing force and the rolling friction among particles, impurity particles adsorbed and intercepted by the filter material fall off and flow through the upper pipe orifice 4 along with the water to be discharged by the back flush water outlet valve 6.
Example 1:
the low-turbidity raw water with the inlet water turbidity about 5 NTU is treated by the filter of the utility model. The upper layer of the filter is 300 mm and is filled with coarse quartz sand with the grain diameter of 0.6-1.0 mm, and the lower layer of the filter is 600 mm and is filled with fine quartz sand with the grain diameter of 0.5-0.6 mm. The operating conditions were as follows: the filtering stage lasts for 26 h; the treatment flow rate is 10 m/h; the flocculating agent is 3 mg/L polyaluminum ferric chloride; the pH value is 7; the backwashing period lasts for 10 min. The run results were as follows: the turbidity removal in the filtration stage was 95.1% and the average effluent turbidity was 0.25 NTU.
Example 2:
the low-turbidity raw water with the inlet water turbidity about 20 NTU is treated by the filter of the utility model. The upper layer of the filter is 300 mm and is filled with coarse quartz sand with the grain diameter of 0.6-1.0 mm, and the lower layer of the filter is 600 mm and is filled with fine quartz sand with the grain diameter of 0.5-0.6 mm. The operating conditions were as follows: the filtering period lasts for 17 h; the treatment flow rate is 10 m/h; the flocculating agent is 3 mg/L polyaluminum ferric chloride; the pH value is 7; the backwashing period lasts for 10 min. The run results were as follows: the turbidity removal in the filtration stage was 98.6% and the average effluent turbidity was 0.27 NTU.
Claims (5)
1. A two-section type contact flocculation filter is characterized in that: the filter consists of an upper cover plate (1), a shell (7) and a lower cover plate (18); the middle part of the shell (7) is provided with a separation plate (10) which plays a role in supporting the upper-layer filter material (5), the upper end surface of the separation plate (10) is provided with a plurality of upper water caps (9), the lower part of the shell (7) is provided with a support plate (15) which plays a role in supporting the lower-layer filter material (12), and the upper end surface of the support plate (15) is provided with a plurality of lower water caps (14); an upper pipeline opening (4) is introduced into the upper part of the shell (7), an upward horn mouth (3) is arranged at one end of the upper pipeline opening (4) in the shell (7), one end of the upper pipeline opening (4) outside the shell (7) is respectively connected with the water inlet valve (2) and the backwashing water outlet valve (6), an air inlet pipeline opening (16) is arranged on the side surface of the lower cover plate (18), the backwashing air inlet valve (17) is connected with the inlet of the air inlet pipeline opening (16), and a lower pipeline opening (19) on the end surface of the lower cover plate (18) is respectively connected with the backwashing water inlet valve (20) and the water outlet valve (21); an upper manhole (8), a middle manhole (11) and a lower manhole (13) are arranged on the side face of the shell (7), the upper manhole (8) and the middle manhole (11) are respectively located on the upper side and the lower side of the partition plate (10), and the lower manhole (13) is located on the upper side of the supporting plate (15).
2. The two-stage contact flocculation filter of claim 1, wherein: a plurality of inner screw holes are formed in the isolation plate (10), and a plurality of water feeding caps (9) are fixed on the isolation plate (10) through outer threaded connectors respectively.
3. The two-stage contact flocculation filter of claim 1, wherein: the supporting plate (15) is provided with a plurality of inner screw holes, and a plurality of water discharging caps (14) are respectively fixed on the supporting plate (15) through outer screw joints.
4. The two-stage contact flocculation filter of claim 1, wherein: the upper layer filter material (5) is coarse quartz sand with the particle size of 0.6-1.0 mm.
5. The two-stage contact flocculation filter of claim 1, wherein: the lower layer filter material (12) is fine quartz sand with the grain diameter of 0.5-0.6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021895681.XU CN212369642U (en) | 2020-09-03 | 2020-09-03 | Two-section contact flocculation filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021895681.XU CN212369642U (en) | 2020-09-03 | 2020-09-03 | Two-section contact flocculation filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212369642U true CN212369642U (en) | 2021-01-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021895681.XU Active CN212369642U (en) | 2020-09-03 | 2020-09-03 | Two-section contact flocculation filter |
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| Country | Link |
|---|---|
| CN (1) | CN212369642U (en) |
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2020
- 2020-09-03 CN CN202021895681.XU patent/CN212369642U/en active Active
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