CN114588666A - Low-pulsation inclined plate sedimentation device - Google Patents
Low-pulsation inclined plate sedimentation device Download PDFInfo
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- CN114588666A CN114588666A CN202210240868.3A CN202210240868A CN114588666A CN 114588666 A CN114588666 A CN 114588666A CN 202210240868 A CN202210240868 A CN 202210240868A CN 114588666 A CN114588666 A CN 114588666A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/0039—Settling tanks provided with contact surfaces, e.g. baffles, particles
- B01D21/0042—Baffles or guide plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/24—Feed or discharge mechanisms for settling tanks
- B01D21/245—Discharge mechanisms for the sediments
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a low-pulsation inclined plate sedimentation device which comprises a sedimentation tank, an inclined plate group, a perforated water collecting pipe and a perforated sludge discharge pipe, wherein a clear water area, an inclined pipe area, a water distribution area and a sludge accumulation area are sequentially arranged in the sedimentation tank from top to bottom, the perforated water collecting pipe is transversely arranged in the clear water area, the inclined plate group is fixedly arranged in the inclined pipe area, a water inlet is arranged at one side of the water distribution area, and the perforated sludge discharge pipe is transversely arranged in the sludge accumulation area. According to the invention, the perforated plate is arranged, so that particles uniformly fall into the next-stage space through the filtering holes in the gliding process, and are in convection collision with new flocculated sludge in the next-stage space, and continuously grow up under the action of contact flocculation to form large-particle precipitates, and then fall into the sludge accumulation area under the action of gravity to be discharged, thereby effectively avoiding the accumulation of sludge between the inclined plates and improving the precipitation efficiency.
Description
Technical Field
The invention relates to the technical field of water treatment equipment, in particular to a low-pulsation inclined plate sedimentation device.
Background
The inclined plate sedimentation tank is a high-efficiency combined sedimentation tank designed according to the shallow tank sedimentation theory, and is also called as a shallow tank sedimentation tank, a plurality of intensive inclined pipes or inclined plates are arranged in a sedimentation area, so that suspended impurities in water are precipitated in the inclined plates or inclined pipes, the water rises along the inclined plates or inclined pipes and flows, and separated sludge slides downwards to the bottom of the tank along the inclined plates (pipes) under the action of gravity and is then discharged in a centralized manner.
However, when the existing inclined plate sedimentation tank is used for a long time or the water quality changes, the settled sludge continuously slides down to the bottom of the inclined plate, so that the sludge between the inclined plates is easily accumulated, the sedimentation efficiency is reduced, the water quality of the discharged water is deteriorated, and the inclined plate can even be collapsed after the sludge is accumulated to a certain degree.
Disclosure of Invention
The invention aims to solve the technical problem that sludge accumulation is easy to occur between inclined plates of the existing inclined plate sedimentation tank, so that the sedimentation efficiency is reduced. In order to overcome the defects of the prior art, the invention provides a low-pulsation inclined plate sedimentation device, particles uniformly fall into a next-stage space through a filter hole in the gliding process by arranging a perforated plate, and are in convective collision with new flocculated sludge in the next-stage space, and continuously grow up under the action of contact flocculation to form large-particle sedimentation, and then fall into a sludge accumulation area under the action of gravity to be discharged, so that the sludge is effectively prevented from being accumulated between inclined plates, and the sedimentation efficiency is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a low-pulsation inclined plate sedimentation device which comprises a sedimentation tank, an inclined plate group, a perforated water collecting pipe and a perforated sludge discharge pipe, wherein a clear water area, an inclined pipe area, a water distribution area and a sludge accumulation area are sequentially arranged in the sedimentation tank from top to bottom;
the inclined plate group includes bracing piece, swash plate, perforated plate and baffle, and two bracing pieces have transversely set firmly in the pipe area to the pipe, have set firmly more than two swash plates between two bracing pieces, and the swash plate parallel arrangement more than two, and the bottom of swash plate has set firmly the perforated plate, and the filtration pore more than two is evenly seted up on the perforated plate surface, and two adjacent swash plates pass through the baffle fixed connection more than two, and the baffle parallel arrangement more than two.
In a preferred technical scheme of the invention, the length of the perforated plate is 10cm-30 cm.
In a preferred technical scheme of the invention, more than two through holes are formed in the perforated water collecting pipe and the perforated sludge discharging pipe.
In a preferred technical scheme of the invention, the inclination angle of the inclined plate is 45-70 degrees.
In a preferred technical scheme of the invention, the distance between two adjacent inclined plates is 10mm-50 mm.
In a preferred technical scheme of the invention, the distance between two adjacent partition plates is 10cm-20 cm.
The invention has the beneficial effects that:
1. through setting up the perforated plate for the granule evenly falls into next stage space through the filtration pore at the gliding in-process, and takes place the convection current collision with new flocculation sludge in next stage space, constantly grows up under the effect of contact flocculation and forms the large granule sediment, and then discharges in the long-pending mud district of falling under the action of gravity, has effectively avoided mud to pile up between the swash plate, has improved precipitation efficiency.
2. Through setting up the perforated plate for the rivers passageway between the swash plate is elongated, and then has prolonged the contact time of sewage between the swash plate, makes the resistance to flow increase simultaneously, thereby makes the water distribution homogeneity increase by a wide margin, has realized the even water distribution of big resistance.
3. Through setting up the baffle, be favorable to rising rivers to form the laminar flow state, avoid rivers to form little swirl, and then lead to the tiny particle to deposit by the top support to the clear water district, influence the condition of play water quality of water.
Drawings
FIG. 1 is a schematic structural diagram of a low-pulsation inclined plate sedimentation device according to an embodiment of the invention;
FIG. 2 is a perspective view of the ramp set of FIG. 1;
FIG. 3 shows experimental parameters of feed water and wastewater obtained under different conditions in this example.
In the figure:
1. a sedimentation tank; 11. a clear water zone; 12. an oblique tube zone; 13. a water distribution area; 14. a mud accumulation area; 2. a swash plate group; 21. a support bar; 22. a sloping plate; 23. a perforated plate; 24. a partition plate; 25. filtering holes; 3. perforating a water collecting pipe; 4. perforating a sludge discharge pipe; 5. a water inlet; 6. and a through hole.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-3, the embodiment provides a low-pulsation inclined plate sedimentation device, which comprises a sedimentation tank 1, an inclined plate group 2, a perforated water collecting pipe 3 and a perforated sludge discharge pipe 4, wherein a clear water area 11, an inclined pipe area 12, a water distribution area 13 and a sludge accumulation area 14 are sequentially arranged in the sedimentation tank 1 from top to bottom, the perforated water collecting pipe 3 is transversely arranged in the clear water area 11, the inclined plate group 2 is fixedly arranged in the inclined pipe area 12, a water inlet 5 is arranged on one side of the water distribution area 13, and the perforated sludge discharge pipe 4 is transversely arranged in the sludge accumulation area 14;
the inclined plate group 2 comprises support rods 21, inclined plates 22, perforated plates 23 and partition plates 24, two support rods 21 are transversely fixedly arranged in the inclined tube area 12, more than two inclined plates 22 are fixedly arranged between the two support rods 21, the inclined plates 22 are arranged in parallel, the perforated plates 23 are fixedly arranged at the bottom ends of the inclined plates 22, more than two filter holes 25 are uniformly formed in the surfaces of the perforated plates 23, the two adjacent inclined plates 22 are fixedly connected through the partition plates 24, and the partition plates 24 are arranged in parallel.
In this embodiment, the sloping plate 22 and the perforated plate 23 are integrally formed, and the extension lines of the perforated plate 23 and the sloping plate 22 coincide. A water flow channel is defined by the two adjacent inclined plates 22 and the two adjacent partition plates 24, in order to ensure the precipitation efficiency, a turbidity sensor is arranged in the water flow channel and is used for detecting the turbidity of the sewage, when the turbidity of the sewage in the water flow channel is lower than 10NTU, a coagulant needs to be added into the water flow channel, and the concentration of impurity particles in the region where the perforated plate 23 is located is ensured to be kept above 150mg/L, so that a re-flocculation sludge layer can be formed, and particle conditions can be provided for contact flocculation; when the turbidity of the sewage in the water flow channel is higher than 10NTU, coagulant does not need to be added. The inclined plates 22 are arranged in parallel, so that a plurality of water flow channels are formed, the space utilization efficiency of the sedimentation tank is improved, the free ends of the inclined plates 22 are fixedly connected with the supporting rods 21 positioned on the upper portion, and the free ends of the perforated plates 23 are fixedly connected with the supporting rods 21 positioned on the lower portion. The diameter of the filter holes 25 is 10mm-30mm, and the distance between two adjacent filter holes 25 is 10 mm. The ascending flow speed of the sewage in the sedimentation tank 1 is controlled within the range of 2.0-3.5mm/s, so that the retention rate of a flocculating constituent can reach more than 99 percent, and the SS of the effluent of the perforated water collecting pipe 3 is less than or equal to 3 mg/L.
Specifically, the perforated plate 23 has a length of 10cm to 30 cm. The length of swash plate 22 is 1m in traditional swash plate sedimentation tank, in this embodiment, through setting up perforated plate 23 for the corresponding extension of length of rivers passageway has 10% -30%, and then makes the corresponding increase 10% -20% of dwell time of rivers in rivers passageway, and the resistance of rivers increases 10% -20%, helps making the water distribution homogeneity increase by a wide margin, realizes big resistance evenly distributed water.
Specifically, more than two through holes 6 are arranged on the perforated water collecting pipe 3 and the perforated sludge discharge pipe 4. In this embodiment, through seting up through-hole 6, increased the water inlet size of perforation collector pipe 3 and perforation mud pipe 4, help improving the efficiency of drainage and row mud.
Specifically, the inclination angle of the swash plate 22 is 45 ° to 70 °. In this embodiment, operating personnel can select suitable inclination according to the speed of granule sedimentation in the sewage, and when granule sedimentation speed was very fast, the inclination of swash plate 22 should also be set up great, guarantees that the granule sedimentation is along the regional of the quick landing of swash plate 22 to perforated plate 23 place, prevents that it from piling up on swash plate 22 surface, influences the velocity of water flow.
Specifically, the distance between two adjacent inclined plates 22 is 10mm-50 mm. In this embodiment, the interval between two adjacent swash plates 22 can be rationally selected as required, wherein, the interval between two adjacent swash plates 22 is the less, and it is better to go out water quality of water. When the distance between two adjacent inclined plates 22 is 10mm, the water flow channel is smaller, and the contact frequency of small-particle colloids in a smaller space is increased, so that alum particles are rapidly precipitated; meanwhile, according to the side wall effect, the resistance between boundary layers can be increased by reducing the size of the water flow channel, so that the water flow resistance is large, the flow distribution in the sedimentation tank is uniform, and the leakage of local alum blossom is avoided, therefore, the water quality of the outlet water of two adjacent inclined plates 22 at the distance of 10mm is better than that of the outlet water at the distance of 35 mm. In addition, the space utilization efficiency of the sedimentation tank can be improved by reducing the distance between two adjacent inclined plates 22.
Specifically, the distance between two adjacent partition boards 24 is 10cm-20 cm. Through setting up baffle 24, be favorable to rising rivers to form the laminar flow state, avoid rivers to form little swirl, and then lead to the tiny particle to deposit by the top support to clear water district 11, influence the condition of play water quality of water. When the distance between two adjacent inclined plates 22 is controlled to be 10mm and the distance between two adjacent partition plates 24 is controlled to be 10cm, the on-way resistance of the water flow channel is between 0.10mm and 0.18 mm; when the distance between two adjacent inclined plates 22 is controlled to be 35mm and the distance between two adjacent partition plates 24 is controlled to be 20cm, the on-way resistance of the water flow channel is between 0.009mm and 0.016 mm; when the distance between two adjacent inclined plates exceeds 35mm, the on-way resistance is continuously reduced, and the water distribution device is not suitable for the situation of large-resistance water distribution.
The working principle is as follows: when the device is used, sewage enters the water distribution area 13 through the water inlet 5, under the action of the pressure of the water inlet, the sewage in the water distribution area 13 flows upwards to the inclined pipe area 12, mud and water are separated on the inclined plate 22, and clear water passes through the inclined plate group 2 to flow into the clear water area 11 in the mud and water separation process and flows out through the perforated water collecting pipe 3; granule impurity then subsides under the effect of swash plate 22's separation and self gravity, and fall to the region at perforated plate 23 place along swash plate 22 whereabouts, the mud granule passes through filtration pore 25 this moment and evenly gets into in the next-level space, form even decline and take place the convection current collision with new flocculation mud, make the flocculation constantly grow up and form the large granule and deposit, the large granule deposits and falls into in long-pending mud district 14 under the action of gravity, then discharge by perforation mud pipe 4, thereby make water obtain purifying.
To illustrate the advantages of the structure according to the invention, the same conditions were compared and analyzed using a controlled variable method (experimental water temperature t 20 ℃, kinematic viscosity v of water 0.01 cm)2S, inlet water turbidity is 100NTU), and the influence of two adjacent inclined plates and two adjacent partition plates on the sludge particle precipitation effect under different spacing conditions is obtained, so that the data shown in figure 3 is obtained;
wherein the specifications of the inclined plate are that the length is 1200mm, the width is 1200mm, and the thickness is 0.85 mm; the aperture of the filter holes is 10mm, and the hole spacing is 10 mm.
By comparing and analyzing the data in the table in FIG. 3, the Reynolds number range in the water supply experiment is 9.0-52.5, the Reynolds number range of the sewage is 26.2-70.0, and the Reynolds number is smaller, so that the hydraulic pulsation can be effectively inhibited, and the negative influence of the water flow detail disturbance on the alumen ustum sedimentation is greatly reduced. Froude number in feedwater ranging from 8.32 x 10-5-1.81×10-4The Froude number in the sewage is in the range of 2.04X 10-5-9.46×10-5The larger Froude number indicates a stronger stability of the water, thereby improving the precipitation effect.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (6)
1. The utility model provides a low pulsation inclined plate precipitation device which characterized in that: the device comprises a sedimentation tank (1), an inclined plate group (2), a perforated water collecting pipe (3) and a perforated sludge discharging pipe (4), wherein a clear water area (11), an inclined pipe area (12), a water distribution area (13) and a sludge accumulation area (14) are sequentially arranged in the sedimentation tank (1) from top to bottom, the perforated water collecting pipe (3) is transversely arranged in the clear water area (11), the inclined plate group (2) is fixedly arranged in the inclined pipe area (12), a water inlet (5) is arranged on one side of the water distribution area (13), and the perforated sludge discharging pipe (4) is transversely arranged in the sludge accumulation area (14);
inclined plate group (2) are including bracing piece (21), swash plate (22), perforated plate (23) and baffle (24), two bracing pieces (21) have transversely set firmly in inclined tube district (12), swash plate (22) more than two have set firmly between two bracing pieces (21), and swash plate (22) parallel arrangement more than two, perforated plate (23) have set firmly in the bottom of swash plate (22), filtration pore (25) more than two have evenly been seted up on perforated plate (23) surface, two adjacent swash plates (22) are through baffle (24) fixed connection more than two, and baffle (24) parallel arrangement more than two.
2. The low pulsation inclined plate sedimentation device according to claim 1, wherein: the length of the perforated plate (23) is 10cm-30 cm.
3. The low pulsation inclined plate sedimentation device according to claim 1, wherein: more than two through holes (6) are formed in the perforated water collecting pipe (3) and the perforated sludge discharging pipe (4).
4. The low pulsation inclined plate sedimentation device according to claim 1, wherein: the inclination angle of the inclined plate (22) is 45-70 degrees.
5. The low pulsation inclined plate sedimentation device according to claim 1, wherein: the distance between two adjacent sloping plates (22) is 10mm-50 mm.
6. The low pulsation inclined plate sedimentation device according to claim 1, wherein: the distance between two adjacent partition plates (24) is 10cm-20 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210240868.3A CN114588666A (en) | 2022-03-10 | 2022-03-10 | Low-pulsation inclined plate sedimentation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210240868.3A CN114588666A (en) | 2022-03-10 | 2022-03-10 | Low-pulsation inclined plate sedimentation device |
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| Publication Number | Publication Date |
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| CN114588666A true CN114588666A (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210240868.3A Pending CN114588666A (en) | 2022-03-10 | 2022-03-10 | Low-pulsation inclined plate sedimentation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116495811A (en) * | 2023-06-26 | 2023-07-28 | 洁夫森环境科技(常州)有限公司 | Sewage treatment device based on activated sludge process |
-
2022
- 2022-03-10 CN CN202210240868.3A patent/CN114588666A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116495811A (en) * | 2023-06-26 | 2023-07-28 | 洁夫森环境科技(常州)有限公司 | Sewage treatment device based on activated sludge process |
| CN116495811B (en) * | 2023-06-26 | 2023-08-25 | 洁夫森环境科技(常州)有限公司 | Sewage treatment device based on activated sludge process |
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Application publication date: 20220607 |