CN111995110A - Inland river and lake dredging tail water environment-friendly treatment system and treatment method - Google Patents
Inland river and lake dredging tail water environment-friendly treatment system and treatment method Download PDFInfo
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- CN111995110A CN111995110A CN202010811472.0A CN202010811472A CN111995110A CN 111995110 A CN111995110 A CN 111995110A CN 202010811472 A CN202010811472 A CN 202010811472A CN 111995110 A CN111995110 A CN 111995110A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005352 clarification Methods 0.000 claims abstract description 25
- 230000007613 environmental effect Effects 0.000 claims abstract description 16
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000001556 precipitation Methods 0.000 claims abstract description 5
- 238000005192 partition Methods 0.000 claims description 50
- 239000008394 flocculating agent Substances 0.000 claims description 30
- 238000004062 sedimentation Methods 0.000 claims description 12
- 239000010802 sludge Substances 0.000 claims description 10
- 238000000151 deposition Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 4
- 230000001112 coagulating effect Effects 0.000 claims description 3
- 210000005056 cell body Anatomy 0.000 claims description 2
- 238000012545 processing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000002002 slurry Substances 0.000 abstract description 2
- 239000000725 suspension Substances 0.000 abstract 1
- 230000008569 process Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 150000003018 phosphorus compounds Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- C02F1/5281—Installations for water purification using chemical agents
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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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (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 an environmental-friendly treatment system and a treatment method for inland river and lake dredging tail water. According to the invention, through the arrangement of the mud discharge channel, the mixing tank and the clarification tank, the discharge flow of tail water is prolonged, the mud-water separation effect is improved, meanwhile, the tail water can be continuously discharged, the ship cannot stop due to natural precipitation of impurities such as slurry waiting for suspension, the construction work efficiency of the ship is indirectly improved, and the construction progress is accelerated. The invention is convenient and economic to implement, has no environmental risk, and meets the requirements of ecological environment-friendly dredging.
Description
Technical Field
The invention belongs to the technical field of inland river and lake dredging and water treatment, and particularly relates to an environmental-friendly treatment system and method for inland river and lake dredging tail water.
Background
In inland river and lake dredging treatment engineering, the treatment of dredging tail water becomes an important content. The environmental protection dredging is one of the main approaches for eliminating the endogenous pollution of inland rivers and lakes and treating black and odorous water, the polluted bottom mud of urban black and odorous water, inland rivers and lakes after environmental protection dredging and preliminary mud-water separation can generate a large amount of dredging tail water, and the endogenous pollution source is released along with the disturbance in the dredging process, so that the dredging tail water contains a large amount of nitrogen and phosphorus compounds, has the characteristic of higher suspended matter concentration, and can cause secondary pollution if being directly discharged.
In typical engineering practice, standard discharge of dredging tail water is mainly realized by cofferdam, storage yard, dosing coagulation promotion and other modes. On one hand, the problem of shutdown caused by overlong waiting time for the mud containing the suspended substances to naturally settle is often caused by different water body pollution degrees; on the other hand, the restriction of environmental protection policy, geographical position of waste soil pile site around city, process and other factors, how to rapidly reduce the concentration of pollutants in tail water, and realizing that the tail water is discharged after being treated with high efficiency and low cost and reaching the standard is a difficult point of the current dredging engineering.
Disclosure of Invention
In order to solve the above problems, it is an object of the present invention to provide an environmental protection treatment system for inland river and lake dredging tail water.
The technical scheme of the invention is as follows:
the utility model provides an inland river lake dredging tail water environmental protection processing system, includes row's mud canal, mixing tank and depositing reservoir, row's mud canal is used for carrying out the primary sedimentation to the tail water, the mixing tank is used for carrying out the tail water after the sediment and flocculating agent intensive mixing, the depositing reservoir is used for carrying out the secondary sedimentation with the tail water after flocculating agent intensive mixing.
Preferably, the tail end of the sludge discharge channel is connected with the wall of the mixing pool, and tail water flowing out of the sludge discharge channel flows into the mixing pool from a water inlet of the mixing pool arranged in the mixing pool; a first overflow groove is arranged between the mixing tank and the clarification tank; and a second overflow trough is arranged in the direction of the outlet of the clarification tank.
Preferably, the mud discharge channel is a channel that is provided with at least one ridge that separates, separate the ridge and fix at the canal bottom and the perpendicular to canal bottom upwards extend, extend highly at least with the high parallel and level of mud discharge channel, separate the ridge and link to each other with the mud discharge channel lateral wall along the one end of channel width direction, the other end leaves the clearance apart from another lateral wall of mud discharge channel, and adjacent two are separated the ridge and are separated the S type with the mud discharge channel and flow through the passageway opposite with the direction of being connected of mud discharge channel lateral wall.
Preferably, the inside perpendicular to mixing tank of mixing tank inflow flow direction of mixing tank is provided with one and mixing tank bottom vertically baffle, baffle both ends and mixing tank wall sliding connection, the lower part leaves the passageway with mixing tank bottom, the passageway size by the baffle is in the ascending slip regulation of mixing tank wall vertical side, the baffle divide into intake antrum and play hydroecium with the mixing tank cell body.
Preferably, a mud falling plate is arranged in the clarification tank, the mud falling plate is inclined to the bottom of the clarification tank, and at least one mud falling plate faces to the water inlet of the clarification tank.
Preferably, the distance between two adjacent separating ridges of the mud discharge channel increases in sequence along the tail water overflowing direction.
Further preferably, the partition board is provided with an auxiliary partition board perpendicular to the partition board on the side of the water inlet chamber, the auxiliary partition board is used for changing the direction of water flow and comprises an upper auxiliary partition board and a lower auxiliary partition board which are arranged in parallel in the vertical direction; the upper auxiliary partition plate and the lower auxiliary partition plate are the same as the partition plates in the length direction and are provided with through holes for water to pass through, and the upper auxiliary partition plate is smaller than the lower auxiliary partition plate in the width direction.
Further preferably, the arrangement form of the through holes on the upper auxiliary partition board comprises round, rectangular or any orderly or disorderly arranged through holes which can allow water flow to pass through.
Preferably, a flocculating agent feeding device is arranged at the water inlet of the mixing tank.
Further preferably, arrange the mud canal and be connected with mixing tank and depositing reservoir U type according to mixing tank and depositing reservoir lateral wall shape adaptability.
The invention also aims to provide an environmental-friendly treatment method for inland river and lake dredging tail water, which comprises the following specific steps:
s1, dredging tail water firstly flows into a mud discharge channel, the tail water flows in the mud discharge channel and is subjected to primary sedimentation, and solid impurities are removed;
s2, enabling the tail water treated in the step S1 to flow into the mixing tank through the water inlet of the mixing tank, adding a flocculating agent when the tail water flows through the water inlet of the mixing tank, and enabling the tail water to be fully mixed with the flocculating agent through the auxiliary partition plate 23, the mixing device 24 and a channel at the bottom of the partition plate 22 in the mixing tank;
s3, the tail water mixed with the flocculating agent flows into a clarification tank through a first overflow tank, and flocculent coagulative precipitation generated by mixing the tail water with the flocculating agent falls on an inclined mud falling plate and slides down along the mud falling plate;
and S4, discharging tail water purified in the steps S1-S3 from a second overflow trough at the tail end of the clarification tank.
The invention has the beneficial effects that:
according to the invention, through the arrangement of the sludge discharge channel, the mixing tank and the clarification tank, the discharge flow of tail water is prolonged, the ridge spacing of the sludge discharge channel is sequentially increased according to the overflowing direction, the overflowing speed is reduced, and the effect of preliminary sedimentation is improved; the mixing tank is provided with a partition plate to change the dynamic situation of the tail water so that the tail water and the flocculating agent are fully mixed and the mixing time is prolonged, wherein the size of a channel at the bottom of the mixing tank and a sliding plate can be adjusted by the sliding arrangement of the partition plate, so that the mixing tank is suitable for treating the tail water with different flow rates, and the mixing degree of the tail water and the flocculating agent can be increased by the upper and lower layers of auxiliary partition plates; the settling pond is provided with a mud dropping plate to improve the effect of flocculate sedimentation. The mud discharge channel, the mixing tank and the clarification tank are matched to improve the mud-water separation effect.
The flocculating agent feeding device can determine a proper flocculating agent and the optimal using amount thereof through comprehensive evaluation of coagulation effect such as flocculating body settleability, supernatant turbidity, chromaticity, pH value, oxygen consumption and the like according to the operation experience of a water plant or the result of a raw water coagulation precipitation test under the tail water treatment requirement or similar conditions.
The sludge discharge channel is connected with the mixing tank and the clarification tank in a U shape, so that the space volume of a treatment system is reduced, the floor area is reduced, and the site setting of the sludge discharge channel is more flexible; meanwhile, in the process of treating the dredging tail water, the tail water can be continuously discharged and continuously purified, the ship cannot stop due to natural precipitation of solid impurities such as slurry suspended in the tail water, the construction work efficiency of the ship is indirectly improved, and the construction progress is accelerated.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of another arrangement of the clarifier of the present invention;
FIG. 4 is a schematic view of the mixing apparatus of the present invention;
FIG. 5 is a top view of the mixing device of the present invention;
FIG. 6 is a schematic view of the arrangement of the mud discharge channel ridges.
The notations in the figures have the following meanings:
10-sludge discharge channel 11-ridge separation 20-mixing tank 21-mixing tank water inlet 22-clapboard 23-auxiliary clapboard 231-upper auxiliary clapboard 232-lower auxiliary clapboard 233-through hole 24-mixing device 241-horizontal baffle 242-support rod 30-clarification tank 31-sludge falling plate 41-first overflow trough 42-second overflow trough I-water inlet chamber II-water outlet 50-flocculating agent feeding device
Detailed Description
The technical solutions of the present invention are described below with reference to the drawings and examples of the specification so as to facilitate understanding for those skilled in the art.
Example 1
As shown in fig. 1 and 2, the system for environmentally treating inland river and lake dredging tail water comprises a mud discharge channel 10, a mixing tank 20 and a clarification tank 30, wherein the mud discharge channel 10 is used for performing primary sedimentation on the tail water, the mixing tank 20 is used for fully mixing the settled tail water with a flocculating agent, and the clarification tank 30 is used for performing secondary sedimentation on the tail water fully mixed with the flocculating agent.
The mud discharging channel 10 is adaptively arranged according to the shapes of the outer side walls of the mixing tank 20 and the clarification tank 30, the mud discharging channel 10 is connected with the mixing tank 20 and the clarification tank 30 in a U shape, the water inlet part of the mud discharging channel 10 is connected with a dredging engineering cofferdam, the tail end of the mud discharging channel 10 is connected with the tank wall where the water inlet of the mixing tank 20 is located, and tail water flowing out of the mud discharging channel 10 flows into the mixing tank from the water inlet 21 of the mixing tank 20; a first overflow groove 41 is arranged between the mixing tank 20 and the clarification tank 30; the direction of the outlet of the clarification tank 30 is provided with a second overflow trough 42, and the height of the first overflow trough 41 is slightly higher than that of the second overflow trough 42.
A flocculating agent putting device 50 is arranged at the water inlet 21 of the mixing tank, and according to the water inflow and the water quality of the tail water, reasonable flocculating agent putting amount can be set in advance and the flocculating agent is uniformly put into the tail water when the tail water flows through the flocculating agent putting device 50, so that the flocculating agent and the tail water are fully mixed in the mixing tank 20; the flocculant was a PAC flocculant.
The mud discharge channel 10 is a channel provided with at least one ridge 11, the ridge 11 is fixed at the bottom of the channel and extends upwards perpendicular to the bottom of the channel, the extending height is at least flush with the height of the mud discharge channel 10, one end of the ridge 11 in the width direction of the mud discharge channel 10 is connected with the side wall of the mud discharge channel 10, a gap is reserved between the other end of the ridge and the other side wall of the mud discharge channel 10, the connecting directions of the two adjacent ridges 11 and the side wall of the mud discharge channel 10 are opposite, and the mud discharge channel 10 is divided into S-shaped flow channels; the distance between two adjacent ridges 11 increases along the tail water overflowing direction in sequence.
A partition plate 22 perpendicular to the bottom of the mixing tank is arranged in the mixing tank 20 and perpendicular to the flow direction of water entering the mixing tank 20, two ends of the partition plate 22 are connected with the wall of the mixing tank 20 in a sliding mode through sliding rails or clamping grooves, a channel is reserved between the lower portion of the partition plate and the bottom of the mixing tank 20, the size of the channel can be adjusted by the partition plate 22 sliding up and down on the wall of the mixing tank 20 according to water treatment requirements, and the mixing tank 20 is divided into an I chamber, namely a water inlet chamber, and an II chamber, namely a water outlet chamber, by the partition; the partition plate 22 is provided with an auxiliary partition plate 23 perpendicular to the partition plate 22 on the side of the water inlet chamber I, the auxiliary partition plate 23 is used for changing the direction of water flow, the auxiliary partition plate 23 comprises an upper auxiliary partition plate 231 and a lower auxiliary partition plate 232 which are arranged in parallel in the vertical direction, the upper auxiliary partition plate 231 and the lower auxiliary partition plate 232 are the same as the partition plate 22 in the length direction, a through hole 233 for water flow to pass through is formed in the upper auxiliary partition plate 231, and the upper auxiliary partition plate 231 is smaller than the lower auxiliary partition plate 232 in the width direction.
As shown in fig. 4 and 5, the mixing device 24 can be further disposed in the bottom space of the lower auxiliary partition 232 to the mixing tank 20 according to the treatment requirement of the tail water, the mixing device includes a horizontal baffle 241 and a support rod 242, the horizontal baffle 241 and the support rod support the baffle are disposed in a staggered manner in the space, and the mixing device 24 can increase the disturbance to the overflowing tail water in the space on the side of the water inlet chamber I of the mixing tank, so as to further improve the mixing degree of the tail water and the flocculant.
The settling pond 30 is internally provided with a mud falling plate 31, the mud falling plate 31 is inclined to the bottom of the settling pond 30, at least one of the mud falling plates 31 faces the water inlet direction of the settling pond 30, and the size of the settling pond 30 and the angle and the size of the mud falling plate 31 are determined according to the specific treatment water quantity, so that the settling pond 30 can meet the process of dynamic inflow-static sedimentation-dynamic outflow.
The bottom of the clarification tank 30 can be a horizontal tank bottom or a concave shape, so that impurities can be deposited and accumulated conveniently.
The environmental-friendly treatment system for the inland river and lake dredging tail water is adopted to treat the tail water, and comprises the following specific steps:
s1, firstly, dredging tail water flows into a mud discharge channel 10, the tail water flows in the mud discharge channel 10 and is subjected to primary sedimentation, and solid impurities are removed;
s2, enabling the tail water treated in the step S1 to flow into the mixing tank 20 through the mixing tank water inlet 21, adding a flocculating agent when the tail water flows through the mixing tank water inlet 21, and fully mixing the tail water with the flocculating agent in the mixing tank 20;
s3, the tail water mixed with the flocculating agent flows into the clarification tank 30 through the first overflow tank 41, and flocculent coagulating sedimentation generated by mixing the tail water with the flocculating agent falls on the inclined mud falling plate 31 and slides down along the mud falling plate 31;
s4, the tail water purified by the steps S1-S3 is discharged from the second overflow trough 42 at the tail end of the clarification tank 30.
In the same tail water treatment, more than one set of tail water environment-friendly treatment system can be used, the tail water treatment speed can be increased by using the tail water environment-friendly treatment system at the same time, and the tail water environment-friendly treatment system can also be used alternately, so that the neutral period when the impurities in the system are fully deposited and need to be desilted is filled.
The above is only a preferred embodiment of the present invention, and is not intended to limit the invention; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An inland river lake dredging tail water environmental protection processing system which is characterized in that: including row mud canal (10), mixing tank (20) and depositing reservoir (30), row mud canal (10) are used for carrying out the primary sedimentation to the tail water, mixing tank (20) are used for the tail water after will deposiing and flocculating agent intensive mixing, depositing reservoir (30) are used for carrying out the secondary sedimentation with the tail water after the flocculating agent intensive mixing.
2. The system for environmental protection treatment of inland river and lake dredging tail water according to claim 1, characterized in that: the tail end of the sludge discharge channel (10) is connected with the wall of the mixing pool (20), and tail water flowing out of the sludge discharge channel (10) flows into the mixing pool (20) from a mixing pool water inlet (21) arranged in the mixing pool (20); a first overflow trough (41) is arranged between the mixing tank (20) and the clarification tank (30); and a second overflow trough (42) is arranged in the outlet direction of the clarification tank (30).
3. The system for environmental protection treatment of inland river lake dredging tail water according to claim 2, characterized in that: arrange mud canal (10) for one be provided with the channel that separates ridge (11) at least one, separate ridge (11) and fix at the canal bottom and the perpendicular to canal bottom upwards extend, extend highly at least with row mud canal (10) high parallel and level, separate ridge (11) and link to each other with row mud canal (10) lateral wall along channel width direction' S one end, the other end leaves the clearance apart from row mud canal (10) another lateral wall, and adjacent two separates ridge (11) and the direction of connection of row mud canal (10) lateral wall is opposite, will arrange mud canal (10) and separate the S type and overflow the passageway.
4. The system for environmental protection treatment of inland river lake dredging tail water according to claim 2, characterized in that: mix inside perpendicular to of mixed pond (20) inflow direction of mixed pond (20) and be provided with one and mix pond (20) bottom vertically baffle (22), baffle (22) both ends and mixed pond (20) pool wall sliding connection, the passageway is left with mixed pond (20) bottom to the lower part, the passageway size by baffle (22) slide adjustment on the vertical side of mixed pond (20) pool wall, baffle (22) divide into intake chamber (I) and play hydroecium (II) with mixed pond (20) cell body.
5. The system for environmental protection treatment of inland river lake dredging tail water according to claim 2, characterized in that: the settling pond is characterized in that a mud falling plate (31) is arranged inside the settling pond (30), the mud falling plate (31) is inclined to the bottom of the settling pond (30), and at least one mud falling plate (31) is arranged towards a water inlet of the settling pond (30).
6. The system for environmental protection treatment of inland river lake dredging tail water according to claim 3, characterized in that: the distance between two adjacent separating ridges (11) of the mud discharge channel (10) is sequentially increased along the tail water overflowing direction.
7. The system for environmental protection treatment of inland river and lake dredging tail water according to claim 4, characterized in that: an auxiliary partition plate (23) which is vertical to the partition plate (22) is arranged on the side of the water inlet chamber of the partition plate (22), the auxiliary partition plate (23) is used for changing the direction of water flow, and comprises an upper auxiliary partition plate (231) and a lower auxiliary partition plate (232) which are arranged in parallel in the vertical direction; the upper auxiliary partition plate (231) and the lower auxiliary partition plate (232) are the same as the partition plate (22) in the length direction, a through hole (233) for water to pass through is formed in the upper auxiliary partition plate (231), and the upper auxiliary partition plate (231) is smaller than the lower auxiliary partition plate (232) in the width direction.
8. The system for environmental protection treatment of inland river lake dredging tail water according to claim 3, characterized in that: and a flocculating agent feeding device (50) is arranged at the water inlet (21) of the mixing tank.
9. The system for environmental protection treatment of inland river lake dredging tail water according to claim 2, characterized in that: arrange mud canal (10) and set up according to mixing tank (20) and depositing reservoir (30) lateral wall shape adaptability, arrange mud canal (10) and mixing tank (20) and depositing reservoir (30) U type and be connected.
10. An environmental protection treatment method for inland river and lake dredging tail water is characterized in that: the treatment method adopting the inland river lake dredging tail water environment-friendly treatment system of any one of claims 1-9 comprises the following specific steps:
s1, firstly, dredging tail water flows into a mud discharge channel (10), the tail water flows in the mud discharge channel (10) and is subjected to primary sedimentation, and solid impurities are removed;
s2, enabling the tail water treated in the step S1 to flow into the mixing tank (20) through a water inlet (21) of the mixing tank (20), adding a flocculating agent when the tail water flows through a water inlet of the mixing tank (20), and enabling the tail water to be fully mixed with the flocculating agent through an auxiliary partition plate (23) and a channel at the bottom of the partition plate (22) in the mixing tank (20);
s3, the tail water mixed with the flocculating agent flows into a clarification tank (30) through a first overflow tank (41), and flocculent coagulative precipitation generated by mixing the tail water with the flocculating agent falls on an inclined mud falling plate (31) and slides along the mud falling plate (31);
s4, discharging tail water purified in the steps S1-S3 from a second overflow trough (42) at the tail end of the clarification tank (30).
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| Title |
|---|
| 唐受印等: "《水处理工程师手册》", 30 April 2000, 化学工业出版社 * |
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| CN111995110B (en) | 2022-10-28 |
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