CN112044121A - Reciprocating flow inclined plate sedimentation tank - Google Patents
Reciprocating flow inclined plate sedimentation tank Download PDFInfo
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- CN112044121A CN112044121A CN202011104109.1A CN202011104109A CN112044121A CN 112044121 A CN112044121 A CN 112044121A CN 202011104109 A CN202011104109 A CN 202011104109A CN 112044121 A CN112044121 A CN 112044121A
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- inclined plate
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- sedimentation tank
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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
- B01D21/0006—Settling tanks provided with means for cleaning and maintenance
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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
- B01D21/003—Sedimentation tanks provided with a plurality of compartments separated by a partition wall
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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
- B01D21/02—Settling tanks with single outlets for the separated liquid
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- Chemical Kinetics & Catalysis (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a reciprocating flow inclined plate sedimentation tank, which comprises a sedimentation tank main body and a water inlet pipe, wherein the sedimentation tank main body consists of a pre-sedimentation area at one side, an inclined plate sedimentation area at the other side and a mud accumulation area at the bottom, the water inlet pipe is communicated with the pre-sedimentation area, a first mud discharge pipe is arranged at the bottom of the pre-sedimentation area, and the inclined plate sedimentation area consists of a downward flow inclined plate area in the middle and upward flow inclined plate areas at two sides. According to the invention, the water and the suspended matters are subjected to primary precipitation separation through the pre-precipitation zone, namely advection pre-precipitation, the supernatant on the upper layer of the pre-precipitation zone is subjected to secondary precipitation separation through the downward flow inclined plate zone, namely cocurrent inclined plate precipitation, the clear water on the upper layer of the downward flow inclined plate zone rotates for 90 degrees and then enters the upward flow inclined plate zone through the water distribution holes to perform tertiary precipitation separation of the water and the suspended matters, namely incongruous flow precipitation, and the water flow is subjected to multiple times of precipitation, so that the precipitation effect is good, and the treatment efficiency is high.
Description
Technical Field
The invention relates to the technical field of sedimentation tanks, in particular to a reciprocating flow inclined plate sedimentation tank.
Background
The sedimentation tank is one of the important processes of water treatment, the existing sedimentation tank mainly comprises a horizontal sedimentation tank, an inclined tube sedimentation tank, an inclined plate sedimentation tank and the like, although the horizontal sedimentation tank has stable water outlet, the occupied area of the horizontal sedimentation tank is several times that of the inclined tube sedimentation tank and the inclined plate sedimentation tank, the investment cost is high, the inclined plates and the inclined tubes mainly adopt an upward flow sedimentation tank, namely, raw water flows upwards from the lower part of the sedimentation tank after being flocculated, passes through the inclined tubes and inclined plate fillers, sludge is precipitated on the surfaces of the inclined tubes and the inclined plates, clean water flows upwards and enters a clean water area, and the collected water flows to the next process through a water collecting tank.
The temperature of each part of water flow in the sedimentation tank is different, bubbles, fine silt or salt and the like are carried in the water flow, so that fluid density difference is generated to form a density flow, the density flow is uneven due to the density flow in the sedimentation tank, the rising flow velocity in the inclined tube is uneven, the flow velocity of water flow in some inclined tubes is high, the flow velocity in some inclined tubes is low, when the flow velocity in one inclined tube in a certain local area in the inclined tube sedimentation tank of dozens of square meters is extremely high, alum floc at the lower part can be brought to a clear water area at the upper part, the effluent is turbid, and the operation is unstable.
Disclosure of Invention
The invention aims to: in order to solve the problems, the reciprocating flow inclined plate sedimentation tank is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the reciprocating flow inclined plate sedimentation tank comprises a sedimentation tank main body and a water inlet pipe, wherein the sedimentation tank main body consists of a pre-sedimentation area at one side, an inclined plate sedimentation area at the other side and a sludge accumulation area at the bottom, the water inlet pipe is communicated with the pre-settling zone, the bottom of the pre-settling zone is provided with a first sludge discharge pipe, the inclined plate settling zone consists of a lower flow inclined plate zone in the middle and upper flow inclined plate zones at two sides, the downward flow inclined plate area and the upward flow inclined plate area are separated by a clapboard, water distribution holes are arranged on the clapboard at equal intervals, so as to realize the communication between the downward flow inclined plate area and the upward flow inclined plate area, the top of the downward flow inclined plate area is communicated with a water inlet area, the top of the upward flow sloping plate area is communicated with a water outlet area, the pre-settling area is communicated with the water inlet area through a water inlet and distribution groove, the bottom of the inclined plate sedimentation area is communicated with a sludge accumulation area, and a second sludge discharge pipe is arranged at the bottom of the sludge accumulation area.
As a further description of the above technical solution:
the inclined plate in the downward flow inclined plate area is inclined by 60 degrees.
As a further description of the above technical solution:
and supporting plates are welded in the middle of the inclined plates in the downward flow inclined plate area and the upward flow inclined plate area.
As a further description of the above technical solution:
the length-width ratio of the inclined plates in the downward flow inclined plate area and the upward flow inclined plate areas on the two sides is 2: 1.
As a further description of the above technical solution:
the baffle is trapezoidal plate, and the water distribution hole is located the third department from the baffle bottom to the top.
As a further description of the above technical solution:
and a water collecting tank is arranged at the top of the water outlet area.
As a further description of the above technical solution:
and a plurality of perforated aeration pipes are arranged in the sludge accumulation area.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, water and suspended matters are subjected to primary precipitation separation through the pre-precipitation zone, sludge at the bottom layer is discharged through the first sludge discharge pipe, supernatant at the upper layer enters the downward flow inclined plate zone through the water inlet distribution tank and the water inlet zone, clear water at the upper layer of the downward flow inclined plate zone rotates by 90 degrees and then enters the upward flow inclined plate zone through the water distribution holes, sludge at the bottom layer is precipitated in the sludge deposition zone to realize secondary precipitation separation of water and suspended matters, supernatant at the upper layer of the upward flow inclined plate zone rises and enters the water collection tank through the water outlet zone, and is discharged out of the main body of the precipitation tank after being collected by the water collection tank, sludge at the bottom layer is precipitated in the sludge deposition zone to realize tertiary precipitation separation of water and suspended matters, the primary precipitation is performed through advection pre-precipitation, the secondary precipitation is performed through the homodromous inclined plate precipitation, the tertiary precipitation is performed through the incongrumous flow, so that the precipitation effect is good, and the treatment efficiency is high.
2. In the invention, the function of uniform water distribution is achieved through the water distribution holes on the partition plate, so that water distribution in the inclined plate sedimentation region is more uniform, the increase of the water yield of a local inclined pipe is avoided, alum blossom is brought out of the inclined plate, the water quality of effluent is influenced, and the inclined plate sedimentation region is ensured.
3. According to the invention, the plurality of perforated aeration pipes are arranged in the sludge accumulation area, the sedimentation tank runs for a long time, bacterial dirt is bred on the surface of the inclined plate, the inclined plate is likely to be blocked after the bacterial dirt is accumulated to a certain degree, compressed air is periodically injected into the perforated aeration pipes, the inclined plate is washed by the rising air flow, the dirt on the surface of the inclined plate is fallen off, and the stable running of the inclined plate sedimentation area is ensured.
Drawings
FIG. 1 is a schematic plan view of a reciprocating flow inclined plate sedimentation tank provided according to an embodiment of the present invention;
FIG. 2 is a schematic front sectional view of a reciprocating flow inclined plate sedimentation tank provided according to an embodiment of the invention;
FIG. 3 is a schematic diagram illustrating an inclined plate arrangement of a reciprocating flow inclined plate sedimentation tank provided according to an embodiment of the invention;
FIG. 4 is a schematic elevation view of a reciprocating flow inclined plate sedimentation tank provided according to an embodiment of the present invention;
fig. 5 is a schematic front view of a partition plate of a reciprocating flow inclined plate sedimentation tank provided according to an embodiment of the invention.
Illustration of the drawings:
1. a water inlet pipe; 2. a pre-settling zone; 3. a water inlet area; 4. a water outlet area; 5. a downstream ramp zone; 6. an upstream ramp zone; 7. a mud accumulation area; 8. a second sludge discharge pipe; 9. a partition plate; 10. a water distribution hole; 11. a first sludge discharge pipe; 12. a water inlet and distribution tank; 13. a water collection tank; 14. a support plate; 15. perforating an aeration pipe; 16. a sedimentation tank main body; 17. a tilted plate sedimentation area.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1-5, the present invention provides a technical solution: a reciprocating flow inclined plate sedimentation tank comprises a sedimentation tank main body 16 and a water inlet pipe 1, wherein the sedimentation tank main body 16 consists of a pre-sedimentation zone 2 at one side, an inclined plate sedimentation zone 17 at the other side and a sludge accumulation zone 7 at the bottom, the water inlet pipe 1 is communicated with the pre-sedimentation zone 2, a first sludge discharge pipe 11 is arranged at the bottom of the pre-sedimentation zone 2, flocculated raw water is flocculated and suspended matters in water are coagulated to form alum flocs, the raw water enters the pre-sedimentation zone 2 through the water inlet pipe 1, the pre-sedimentation zone 2 is a horizontal flow sedimentation tank, large-particle alum flocs quickly sink in the pre-sedimentation zone 2 and precipitate to the bottom of the pre-sedimentation zone 2 to form sludge, the sludge is periodically discharged through the first sludge discharge pipe 11 to realize the primary sedimentation of the raw water, the inclined plate sedimentation zone 17 consists of a middle downward flow inclined plate zone 5 and upward flow inclined plate zones 6 at two sides, the top of the downward flow inclined plate zone 5 is communicated with a water inlet zone 3, and the top, the pre-settling area 2 and the water inlet area 3 are communicated through a water inlet distributing groove 12, supernatant liquid above the pre-settling area 2 enters a downward flow inclined plate area 5 through the water inlet distributing groove 12 and the water inlet area 3, alum blossom in water sinks to the surface of an inclined plate to form sludge, the sludge flows downwards under the action of water flow pushing and self-gravity to reach the bottom of the inclined plate, water is effectively separated from suspended matters, the bottom of the downward flow inclined plate area 5 is a sludge area, the upper layer is a clear water area, the downward flow inclined plate area 5 and the upward flow inclined plate area 6 are separated through a partition plate 9, water distributing holes 10 are formed in the partition plate 9 at equal intervals, the water distributing holes 10 play a role of uniformly distributing water inside the inclined plate, when the water flow passes through the water distributing holes 10, water column loss of 10-20mm is generated, when the flow velocity of holes in a certain part is increased, the water head loss, namely resistance is increased, and the increase of the flow entering the inclined plate is limited, ensuring that the water inflow of each inclined plate is uniform and consistent so as to realize the communication between the downward flow inclined plate area 5 and the upward flow inclined plate area 6, rotating the clear water on the upper layer of the downward flow inclined plate area 5 by 90 degrees, entering the upward flow inclined plate area 6 through the water distribution holes 10 at the bottom of the partition plate 9, realizing the secondary sedimentation and separation of water and suspended matters, performing contact flocculation on sludge mixed in the water flow entering the inclined plates of the upward flow inclined plate area 6 to form a clear water area on the upper layer and a sludge area on the bottom layer, communicating the sludge accumulation area 7 at the bottom of the inclined plate sedimentation area 17, arranging a second sludge discharge pipe 8 at the bottom of the sludge accumulation area 7, depositing sludge particles at the bottom of the inclined plate, automatically sliding downwards under the action of overcoming the upward thrust of the water flow, depositing the sludge in the sludge area 7 at the bottom of the upward flow inclined plate area 6, and discharging the sludge through the second sludge discharge pipe 8, wherein the water flow entering the upward flow inclined plate area 6 from the water distribution holes 10, at the inlet section of the upward flow inclined plate area 6, due to the non-precipitated suspended matters brought by the precipitation stage of the downward flow inclined plate area 5, muddy water is mixed, water flow is disordered, and the sludge concentration is also high, which is called a transition section, although muddy water is mixed, the sludge concentration is high, and the centrifugal force generated by the 90-degree rotation of water flow is added, the contact flocculation of sludge is facilitated, small particle suspended matters are aggregated into large particle suspended matters, the particle precipitation speed is increased, the clarification of the inlet water quality is accelerated, and the precipitation load of the upward flow inclined plate area 6 is reduced due to the reduced sludge concentration in the raw water, the suspended matters of the outlet water of the inclined plate are reduced, wherein, due to the overflow resistance when the water flow passes through the water distribution holes 10 at the bottom of the partition plate 9, 10% -20% of the water in the downward flow inclined plate area 5 can not enter the upward flow inclined plate area 6 through the water distribution holes 10, the small amount of water flow carries sludge to flow out of the bottom of the downward flow inclined plate area 5 and enter the sludge accumulation area 7, the sludge enters the upward flow inclined plate area 6 again after the sludge accumulation area 7 rotates for 90 degrees, and the sludge carried by the water flow is quickly precipitated in the upward flow inclined plate area 6 due to small flow and low flow speed.
Referring to fig. 2, the inclined plate in the downward flow inclined plate area 5 is inclined by 60 degrees, so that sludge on the inclined plate can flow out conveniently.
Referring to fig. 4, the length-to-width ratio of the swash plates in the downward flow swash plate area 5 and the upward flow swash plate areas 6 on both sides is 2:1, and the support plates 14 are welded to the middle portions of the swash plates inside the downward flow swash plate area 5 and the upward flow swash plate areas 6 to prevent the swash plates from deforming under the action of gravity.
Referring to fig. 1 and 3, a water collecting tank 13 is disposed at the top of the water outlet zone 4, and after the third sedimentation in the upward flow inclined plate zone 6, the water flow rises to the top of the inclined plate in the upward flow inclined plate zone 6, enters the water outlet zone 4, is collected by the water collecting tank 13 at the top of the water outlet zone 4, and is then conveyed out of the sedimentation tank.
Example two
Different from the first embodiment
Referring to fig. 2 and 5, the partition plate 9 is a trapezoidal plate, and the water distribution hole 10 is located at one third of the position from the bottom to the top of the partition plate 9, since the water distribution hole 10 is located at the upper layer of the downward flow inclined plate area 5, and the upper layer of the downward flow inclined plate area 5 is a clear water area, clear water can enter the upward flow inclined plate area 6 through the water distribution hole 10, and sludge at the lower layer of the downward flow inclined plate area 5 is blocked by the partition plate 9, and cannot pass through the water distribution hole 10, so that mud and water separation is achieved.
EXAMPLE III
Different from the first embodiment
Referring to fig. 2 and 3, a plurality of perforated aeration pipes 15 are arranged in the sludge accumulation area 7, the sedimentation tank runs for a long time, bacterial dirt is bred on the surface of the inclined plate, the inclined plate is likely to be blocked after the bacterial dirt is accumulated to a certain degree, the inclined plate is flushed by the aid of the ascending air flow by injecting compressed air into the perforated aeration pipes 15 periodically, dirt on the surface of the inclined plate is removed, and stable running of the inclined plate sedimentation area 17 is guaranteed.
The working principle is as follows: when the device is used, firstly, flocculated raw water and suspended matters in the water are coagulated to form alum flocs, the raw water enters a pre-settling zone 2 through a water inlet pipe 1, the pre-settling zone 2 is a horizontal sedimentation tank, large-particle alum flocs quickly sink in the pre-settling zone 2 and precipitate to the bottom of the pre-settling zone 2 to form sludge, and the sludge is periodically discharged through a first sludge discharge pipe 11, so that the purpose of primary sedimentation of the raw water is realized;
secondly, the supernatant above the pre-settling zone 2 enters a downward flow inclined plate zone 5 through a water inlet water distribution tank 12 and a water inlet zone 3, alum blossom in water sinks to the surface of an inclined plate to form sludge in the process of slow flow of water, the sludge flows downward to the bottom of the inclined plate under the action of water flow pushing and self-gravity, water is effectively separated from suspended matters, the bottom of the downward flow inclined plate zone 5 is a sludge zone, the upper layer of the downward flow inclined plate zone 5 is a clear water zone, clear water on the upper layer of the downward flow inclined plate zone 5 rotates by 90 degrees and enters an upward flow inclined plate zone 6 through a water distribution hole 10 on the bottom of a partition plate 9, the water and the suspended matters are subjected to secondary sedimentation separation, and the sludge in a sludge accumulation zone 7 is discharged through a second sludge discharge pipe 8 to remove the suspended matters with high sedimentation speed in the raw water;
finally, sludge mixed in water flow entering the inclined plates of the upward flow inclined plate area 6 is contacted and flocculated to form a clear water area on the upper layer and a sludge area on the bottom layer, supernatant on the upper layer of the upward flow inclined plate area 6 rises to the top of the inclined plates, enters the water outlet area 4, is collected by a water collecting tank 13 on the top of the water outlet area 4 and then is conveyed out of the sedimentation tank main body 16, sludge on the inclined plates automatically slides downwards under the action of overcoming the upward thrust of the water flow, the sludge sinks into the sludge accumulation area 7 and is discharged through a second sludge discharge pipe 8, and third sedimentation and separation of water and suspended matters are realized;
wherein, because rivers have the resistance that overflows when passing through the water distribution hole 10 of baffle 9 bottom to take place, 10% -20% water yield in the downward flow swash plate district 5 can not get into upward flow swash plate district 6 inside through water distribution hole 10, these a small amount of rivers carry mud outflow downward flow swash plate district 5 bottom, get into long-pending mud district 7, after long-pending mud district 7 is rotatory 90 degrees, reentrant upward flow swash plate district 6, because the flow is few, the velocity of flow is low, the mud that this part rivers carried is very fast depositd in upward flow swash plate district 6.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The reciprocating flow inclined plate sedimentation tank comprises a sedimentation tank main body (16) and a water inlet pipe (1), and is characterized in that the sedimentation tank main body (16) consists of a pre-sedimentation area (2) at one side, an inclined plate sedimentation area (17) at the other side and a sludge accumulation area (7) at the bottom, the water inlet pipe (1) is communicated with the pre-sedimentation area (2), a first sludge discharge pipe (11) is arranged at the bottom of the pre-sedimentation area (2), the inclined plate sedimentation area (17) consists of a middle downward flow inclined plate area (5) and upward flow inclined plate areas (6) at two sides, the downward flow inclined plate area (5) and the upward flow inclined plate area (6) are separated by a partition plate (9), water distribution holes (10) are formed in the partition plate (9) at equal intervals to realize the communication between the downward flow inclined plate area (5) and the upward flow inclined plate area (6), and a water inlet area (3) is communicated with the top of the downward flow inclined plate area (5), the top of the upward flow inclined plate area (6) is communicated with a water outlet area (4), the pre-settling area (2) is communicated with the water inlet area (3) through a water inlet distribution groove (12), the bottom of the inclined plate settling area (17) is communicated with a sludge accumulation area (7), and a second sludge discharge pipe (8) is arranged at the bottom of the sludge accumulation area (7).
2. The reciprocating flow inclined plate sedimentation tank as claimed in claim 1, wherein the inclined plates inside the downward flow inclined plate zone (5) are disposed inclined at 60 degrees.
3. The reciprocating inclined plate sedimentation tank of claim 1, wherein the support plates (14) are welded to the middle parts of the inclined plates inside the downward flow inclined plate area (5) and the upward flow inclined plate area (6).
4. The reciprocating flow inclined plate sedimentation tank of claim 1, wherein the inclined plate length-to-width ratio in the downward flow inclined plate zone (5) and the upward flow inclined plate zones (6) on both sides is 2: 1.
5. The reciprocating inclined plate sedimentation tank as claimed in claim 1, wherein the partition plate (9) is a trapezoidal plate, and the distribution hole (10) is located in the third from the bottom to the top of the partition plate (9).
6. The reciprocating flow inclined plate sedimentation tank as claimed in claim 1, wherein a water collecting tank (13) is arranged at the top of the water outlet zone (4).
7. The reciprocating inclined plate sedimentation tank as claimed in claim 1, wherein a plurality of perforated aeration pipes (15) are provided in the sludge accumulation zone (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011104109.1A CN112044121A (en) | 2020-10-15 | 2020-10-15 | Reciprocating flow inclined plate sedimentation tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011104109.1A CN112044121A (en) | 2020-10-15 | 2020-10-15 | Reciprocating flow inclined plate sedimentation tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974244A (en) * | 2022-11-07 | 2023-04-18 | 辛集市宏四海皮革有限公司 | Leather degrease waste water treatment equipment |
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2020
- 2020-10-15 CN CN202011104109.1A patent/CN112044121A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115974244A (en) * | 2022-11-07 | 2023-04-18 | 辛集市宏四海皮革有限公司 | Leather degrease waste water treatment equipment |
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