CN111792763A - High turbid water treatment device and sewage treatment system - Google Patents
High turbid water treatment device and sewage treatment system Download PDFInfo
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- CN111792763A CN111792763A CN202010838542.1A CN202010838542A CN111792763A CN 111792763 A CN111792763 A CN 111792763A CN 202010838542 A CN202010838542 A CN 202010838542A CN 111792763 A CN111792763 A CN 111792763A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 239000010865 sewage Substances 0.000 title claims description 28
- 238000004062 sedimentation Methods 0.000 claims abstract description 76
- 238000005189 flocculation Methods 0.000 claims abstract description 38
- 230000016615 flocculation Effects 0.000 claims abstract description 38
- 208000028659 discharge Diseases 0.000 claims abstract description 26
- 238000005345 coagulation Methods 0.000 claims abstract description 22
- 230000015271 coagulation Effects 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 10
- 238000001556 precipitation Methods 0.000 claims abstract description 9
- 239000010802 sludge Substances 0.000 claims description 61
- 239000007788 liquid Substances 0.000 claims description 13
- 239000002002 slurry Substances 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 239000008394 flocculating agent Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 13
- 230000014759 maintenance of location Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 5
- 239000004927 clay Substances 0.000 description 4
- 239000000084 colloidal system Substances 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000005791 algae growth Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000001179 sorption measurement Methods 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- 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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a high turbidity water treatment device, which comprises: the device comprises a first stirrer, a guide cylinder, a second stirrer, a rectifying plate and a settling zone, wherein the first stirrer is arranged in a coagulation tank, high-turbidity water enters the coagulation tank, a nano flocculating agent is added, and the high-turbidity water is rapidly stirred by the first stirrer to perform coagulation reaction with the nano flocculating agent; the draft tube and the second stirrer are arranged in the flocculation tank, high turbid water after coagulation enters the draft tube, is stirred and lifted out of the draft tube by the second stirrer, and enters the precipitation zone after passing through the rectifying plate to undergo precipitation reaction and carry out pollution discharge treatment. The invention utilizes the nano-scale flocculation technology to provide good flocculation conditions, improve flocculation and sedimentation effects and shorten sedimentation time; the forms of the mud scraper and the mud pump are improved, the reliability of the equipment is improved, and the higher turbidity water can be reduced to the conventional water inlet standard under the condition of not enlarging the area and the depth of the sedimentation tank.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a high-turbidity water treatment device.
Background
At present, China is in a state of strictly controlling ecological red lines, and great attention is paid to sewage treatment. In the practical application of sewage treatment, the water inlet turbidity (SS) of a sewage plant in a special area often exceeds the SS water inlet value specified in the sewage discharge town sewer water quality standard, and the water inlet turbidity can reach thousands of milligrams per liter at high time, most of the clay and silt exist, so that the impact on the sewage plant is very large, and if other conventional primary sedimentation tanks are designed according to the condition exceeding the standard, the investment is high, and the occupied area is large; if the design is designed according to the normal nanotube standard, the impact of high load cannot be resisted, and the risk of equipment damage or excessive effluent exists. Aiming at the most commonly used sedimentation tank for treating high-turbidity water in the existing sewage treatment process, the sedimentation tank mainly adopts a vertical flow sedimentation tank, a horizontal flow sedimentation tank, a radial flow sedimentation tank, an inclined (tube) sedimentation tank and a high-density sedimentation tank. However, the traditional sedimentation tank has the advantages of low load, large occupied area, deep tank body, complex equipment, high operation and maintenance cost and poor impact resistance, and is not suitable for being applied to the condition of high-turbidity water inlet.
For the vertical flow sedimentation tank, only the particles with the sedimentation velocity more than or equal to the water flow rising velocity are removed, the surface load selection value is small, namely the surface area of the tank is large, the occupied area is large, and the actual application is less. The horizontal flow sedimentation tank is a sedimentation tank which is used more at present, has high performance stability and removal efficiency, is applied earlier in China, and uses the widest mud-water separation structure, the horizontal flow sedimentation tank is a rectangular water tank, the upper part is a sedimentation zone (or called a mud-water separation zone), the bottom is a mud storage zone, the sludge in the mud storage zone is discharged out of the tank through a mud suction machine and a mud scraping pipe, and the horizontal flow sedimentation tank has the defects that the horizontal flow sedimentation tank is applied to the mud scraping machine of the horizontal flow sedimentation tank: the chain plate type mud scraper and the hydraulic reciprocating type mud scraper have higher failure rate, the truss type mud scraper needs higher clearance, and the mud pump needs frequent maintenance or replacement because the settled mud is seriously worn. For a width of flow sedimentation tank, the gravity sedimentation of the particles or flocs is applied to remove suspended matters in water, the traditional water treatment structure adopts a rectangular form and a circular form in a planar form, and is widely applied to water supply and sewage treatment process flows, but the water flow velocity of the width of flow sedimentation tank is unstable and is greatly influenced by water inflow; bottom mud scraping and discharging equipment is complex, the requirement on construction units is high, and the occupied area is larger than that of other sedimentation tanks. The inclined plate (inclined tube) sedimentation tank has high sedimentation efficiency and short retention time, and is suitable for a primary sedimentation tank and not suitable for a secondary sedimentation tank. The inclined plate equipment has the problems of algae growth and the like under certain conditions, and is inconvenient to maintain and manage; the gravity sludge discharge mode is adopted, and the sludge discharge is difficult to some extent. The high-density sedimentation tank is a high-speed integrated sedimentation/concentration tank, and has the advantages that: the sludge circulation improves the flocculation capacity of the sludge, so that the floccules are more uniform and compact; the inclined tube arrangement improves the precipitation effect, has higher precipitation speed which can reach 20m/h, and has higher quality of clarified water; the impact load resistance is stronger, but the tank body and equipment are complex, the tank body is deeper, and the investment is higher.
Through the retrieval, patent document CN203355388U discloses an integration sand setting sedimentation tank, and this prior art adopts machinery to arrange mud or perforated pipe row mud, belongs to the improvement version of swash plate sedimentation tank, and the cell body is darker, and the flocculation section adopts water conservancy flocculation, and area is big to can lead to the blow off pipe burden heavy, can aggravate the operation load of pump. Patent document CN204093101U discloses a baffling coagulation quick sedimentation tank, which comprises a tank body, a truss is installed on the upper portion of the tank body, the tank body is divided into a flocculation tank area and a sedimentation tank area by a partition wall, a discharge frame is installed in the sedimentation tank area, a water outlet tank is installed on the upper portion of the sedimentation tank area, at least one partition plate is installed in the flocculation tank area, the partition plate divides the flocculation tank area into at least two flocculation areas, a plurality of baffling flocculation plates are respectively connected to the tank bottom and the truss in the flocculation areas, the distance between two adjacent baffling flocculation plates is gradually increased from front to back, each baffling flocculation plate comprises a connecting plate and a baffle plate, the baffle plate is made of a plate which is continuously bent in a longitudinal section, the bending sections of the baffle plates on the tank bottom and the truss are oppositely arranged, a pressure difference mud discharging device is installed at the tank bottom of the flocculation tank area, and. The prior art has the disadvantages that the siphon sludge discharge increases the risk of air leakage of the sewage pump, which causes the fault of the sewage pump; the baffle plates arranged by baffling flocculation are too many, occupy large area, are purely dependent on the action of water power, and have low efficiency and more material consumption.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a high-turbidity water treatment device and a sewage treatment system, wherein a nano-flocculant is added, so that the flocculation efficiency is improved, the particle settling speed is increased, the settling time is shortened, the floor area is reduced, and the turbidity removal rate can reach 85 percent at most; the invention is particularly suitable for underground sewage treatment plants.
According to the present invention, there is provided a high-turbidity water treatment apparatus comprising: a first stirrer, a guide cylinder, a second stirrer, a rectifying plate and a settling zone,
the first stirrer is arranged in the coagulation tank, high-turbidity water enters the coagulation tank, the nano flocculant is added, and the high-turbidity water is quickly stirred by the first stirrer to perform coagulation reaction with the nano flocculant; the guide shell and the second stirrer are arranged in the flocculation tank, the coagulated high-turbidity water enters the guide shell and is stirred and lifted out of the guide shell by the second stirrer, and the flocculated high-turbidity water enters the precipitation zone through the rectifying plate to undergo precipitation reaction and undergo pollution discharge treatment; the draft tube is provided with a plurality of baffles.
Preferably, the system also comprises a water inlet area, wherein the water inlet area comprises a water inlet pipe and a water inlet baffle, and the water inlet pipe is connected with the water inlet baffle and is connected to the coagulation tank.
Preferably, the water distributor further comprises a water distribution plate, the water distribution plate is connected with the rectifying plate, the water distribution plate is provided with water distribution holes and a water passing position, and the water passing position is arranged at the lower end of the water distribution plate.
Preferably, the settling zone comprises a spiral conveying sludge discharge machine, a sludge hopper and a slurry sludge discharge pump, flocculated high-turbidity water forms flocs capable of being removed after a settling reaction and is settled in the sludge hopper, and the spiral conveying sludge discharge machine conveys the flocs capable of being removed to the foremost end of the sludge hopper and pumps the flocs out of the sludge hopper through the slurry sludge discharge pump to discharge the flocs into the sludge storage tank.
Preferably, the sedimentation zone further comprises an electric skimming pipe, a slag discharging water pipe and a grid slag frame, scum in high-turbidity water is collected and discharged to the grid slag frame at regular time through the electric skimming pipe, sewage with scum filtered enters a water channel at the bottom of the grid slag frame, and is discharged to a structure at the front end of the water inlet zone through the slag discharging water pipe.
Preferably, the settling zone further comprises a water collecting tank, an outlet channel and an outlet pipe, and clear water obtained by flocculation treatment and scum filtration of high-turbidity water enters the outlet channel after passing through the water collecting tank and then enters the next treatment structure through the outlet pipe.
Preferably, the sedimentation zone further comprises a sludge level meter, the sludge level meter is capable of monitoring the sludge level,
when the liquid level of the flocs which can be removed rises to a set threshold A, a slurry sludge pump can be started to discharge sewage;
when the liquid level of the flocs which can be removed is reduced to a set threshold value B, the slurry sludge pump can be closed to stop discharging,
the flocs that can be removed in the present invention are also known as sludge.
Preferably, the settling zone still includes the blow-down pipe, and when high muddy water processing apparatus need overhauld, the blow-down pipe can reduce the liquid level in settling zone to the opening part of sludge bucket, and the floc that the surplus can be got rid of is discharged through sediment thick liquid sludge discharge pump.
Preferably, the guide shell foundation is further included, has a hydraulic guide effect and is arranged below the guide shell, and two sides of the guide shell foundation are arc-shaped.
According to the sewage treatment system provided by the invention, the high-turbidity water treatment device is adopted to treat high-turbidity water.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the nano flocculant is adopted, so that the size of coagulated flocs is increased, the surface load is increased, and the removal efficiency of turbidity in high-turbidity water is obviously improved.
2. The invention adopts the guide shell, the stirrer, the guide shell foundation with hydraulic guide function, the rectifying plate and the like, so that the flocculation is more sufficient and the short flow is avoided.
3. The invention divides the flocculation tank into two parts by arranging the guide shell baffle, water enters the tank from an opening at the upper part of the flocculation tank, flows downwards through the guide part of the guide shell base, enters the barrel, is fully mixed, flows out from the other side of the guide shell, and finally enters the sedimentation area through the rectifying device, so that the flocculation effect is good, more and larger floccules are generated, the vertical speed of the floccule particles is increased, the interception speed can be reduced under the same removal rate, the retention time is shortened, and the sedimentation area is saved.
4. The shaftless spiral conveying mud discharging machine is adopted to replace the traditional common chain plate type mud scraper, hydraulic reciprocating type mud scraper and truss car type mud scraper, so that the failure rate of the mud scraper is reduced, the conveying amount of the precipitated mud in unit time is increased, and the shaftless spiral conveying mud discharging machine is suitable for treating high-turbidity inlet water.
5. The invention improves the overall reliability of the equipment by adopting the wear-resistant slurry pump to replace the traditional common submersible sewage pump and the cam sand suction pump, solves the problem of frequent replacement, does not increase investment, and integrally installs the pump and the sedimentation tank, thereby fully saving the occupied land.
6. According to the invention, the scum can be collected by arranging the skimming device in the sedimentation area, so that the water in the water outlet pipe is clearer.
7. The emptying pipe is arranged in the sedimentation area, so that the liquid level in the sedimentation area can be reduced when the high-turbidity water treatment device is overhauled, and the purpose of overhauling and cleaning the sewage is achieved.
8. The invention adopts steel integrated equipment, is convenient to install, reduces the construction period, saves the occupied land and relieves the shortage of land for sewage treatment plants.
9. The residence time of the invention in the sedimentation zone is 13-17min, the residence time of the traditional sedimentation tank as a primary sedimentation tank is 0.5-2.0h, the residence time of the traditional sedimentation tank as a secondary sedimentation tank is 1.5-4h (25-30 min for high-efficiency clarification inclined plate sedimentation tank), and the residence time of the traditional sedimentation tank as a secondary sedimentation tank is 1.5-3h in the water supply field.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a cross-sectional view of an angle of a high turbidity water treatment apparatus 1-1;
FIG. 2 is a plan view of the overall structure of the high turbidity water treatment apparatus;
FIG. 3 is a cross-sectional view of an angle of the high turbidity water treatment apparatus 2-2;
FIG. 4 is a cross-sectional view of the high turbidity water treatment apparatus 3-3.
In the figure:
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in figures 1, 2, 3 and 4, the invention provides a high-turbidity water treatment device which comprises a water inlet pipe 1, a water inlet baffle 2, a first stirrer 3, a guide cylinder base 4, a guide cylinder 5, a second stirrer 6, a rectifying plate 7, a water distribution plate 8, a spiral conveying sludge discharge machine 9, an electric slag skimming pipe 10, a sludge liquid level meter 11, a box body 12, a water collecting tank 13, a water outlet channel 14, a water outlet pipe 15, a slag discharge water pipe 16, an emptying pipe 17, a grid slag frame 18, a sludge hopper 19 and a slag slurry sludge discharge pump 20.
The high-turbidity water enters from the water inlet pipe 1, the water inlet baffle 2 is connected with the water inlet pipe 1 and is connected to the coagulation tank, and the water inlet baffle is used for enabling the high-turbidity water to be uniformly distributed on each overflowing section as far as possible. High turbid water enters a coagulation tank from the lower part of the coagulation tank, a nano flocculant is added into the coagulation tank, a first stirrer 3 in the coagulation tank rapidly stirs the high turbid water and performs coagulation reaction with the nano flocculant, the high turbid water enters the flocculation tank through a hole at the upper part of the coagulation tank, the high turbid water is blocked by a side baffle on a guide cylinder 5, the high turbid water passes through a guide cylinder base 4 and enters the guide cylinder from the bottom of the guide cylinder 5, the high turbid water is stirred and lifted out of the guide cylinder 5 by a second stirrer 6 in the flocculation tank, the water flows out of the guide cylinder 5 and is blocked by a rectifying plate 7, the water flows cross another side baffle on the guide cylinder 5 from top to bottom and then enters a sedimentation area through grid bars at the bottom end of the rectifying plate 7, the high turbid water passes through a water distribution hole on a water distribution plate 8 and a water distribution part at the lower end, the sedimentation reaction starts to occur after rectification, and particles larger than the intercepted speed of the sedimentation tank in the, the part of particle flocs in the high turbidity water, which is lower than the retention speed of the sedimentation tank, is removed, namely flocs capable of being removed and flocs incapable of being removed are formed, and scum in the high turbidity water is also formed. The removed flocs are deposited in a sludge hopper 19, conveyed to the deepest part of the foremost end of the sludge hopper 19 through a spiral conveying sludge discharge machine 9, pumped out by a sludge slurry discharge pump 20 and sent to a sludge storage tank.
Further, the scum in the upper part of the box body 12 is collected and discharged into the grid frame 18 at regular intervals through the electric scum pipe 10, the sewage containing the non-removed flocs and the scum filtered out enters a water channel at the bottom of the grid frame 18 and is discharged to a water inlet front end structure (such as a coarse grid) through the scum pipe 16, and the scum in the grid frame 18 is cleaned periodically.
Still further, clarified water from the upper portion of the tank 12 is collected by the sump 13 into the outlet channel 14 and then through the outlet pipe 15 into the next treatment structure.
Moreover, the sedimentation tank continuously feeds water and discharges water, when the maintenance is needed, the liquid level is lowered to the upper part of the sludge hopper 19 through the emptying pipe 17, and the maintenance can be started after the residual sludge is pumped to the sludge channel through the sewage pump. When the device operates, the sludge liquid level can be monitored by the sludge liquid level meter 11, the sludge reaches a set high level, the slurry pump 20 is started, and the slurry pump 20 is closed after the sludge is reduced to a low liquid level.
The turbidity of the high-turbidity water in the invention is between 300-2000mg/L, and the flocs which can be removed in the invention are also called sludge.
According to the inventionPreferred embodiment(s) of the inventionFor further explanation.
Based on the basic embodiment, when the included angle between the sludge hopper 19 and the bottom of the box body 12 is 55 degrees, the sludge carried by the sludge hopper 19 is easy to collect and draw out.
Based on the basic embodiment, the first stirrer 3 adopts a high-speed stirrer, so that high-turbidity water fully contacts the overflowing section; the second stirrer 6 adopts a low-speed stirrer to fully flocculate the high flushing water.
The invention provides a high-turbidity water treatment device, which utilizes a nano-scale flocculation technology and provides good flocculation conditions to improve flocculation and sedimentation effects and shorten sedimentation time; the form of the mud scraper and the mud pump is improved, the reliability of the equipment is improved, and the high-turbidity water can be reduced to the conventional water inlet standard under the condition of not enlarging the area and the depth of the sedimentation tank.
The invention adopts the nano-scale flocculating agent with large specific surface area and high surface energy, increases the size of the flocculated body after coagulation, promotes the surface load and obviously improves the removal efficiency. SS inorganic clay removed from the sedimentation tank has a high proportion (sand grains with the grain diameter larger than 200um are removed from the aeration sand sedimentation tank), clay colloid particles are usually negatively charged, electrostatic repulsion generated by charges with the same property is the main reason of hydrophobic colloid (clay), a flocculating agent is added to reduce the colloid potential, reduce the surface charge, and colloid particles collide with each other and destabilize to generate coagulation. Meanwhile, the flocculant also plays a role in adsorption and bridging, and the polymeric flocculant adsorbs negatively charged colloidal particles in a solution by utilizing a longer molecular chain structure of the polymeric flocculant to link the colloidal particles to form larger floc precipitates. After the nano-scale flocculant is added into water, colloidal particles are quickly coagulated into larger particles, then the settling speed is increased, namely, more suspended matters can be removed under the condition of not reducing the interception speed, so that the settling area is saved. Compared with the common flocculating agent, the nano material has the unique advantages of large specific surface area, high surface energy and the like, and generally has better pollutant removal effect and higher removal efficiency. The nano flocculant is adopted, the dosage is 100 mu L/L, and the SS removal rate can reach more than 85 percent. If the purchase of the medicament is inconvenient, the medicament can be replaced by the common polymeric flocculant, the removal rate can still reach 80 percent, but the medicament consumption is increased.
The invention adopts a special high-efficiency flocculation device, reduces flocculation and sedimentation time and saves occupied land. Set up 3 baffles, 1 draft tube, 1 mixer, 1 cowling panel, 1 draft tube basis that has water conservancy diversion effect in the flocculation basin, make the flocculation more abundant, avoid short stream. The flocculation basin is separated into two parts by draft tube baffle, and water gets into the pond from flocculation basin upper portion opening, and in the water conservancy diversion part via draft tube basis downwards got into the bucket, intensive mixing flowed out from one side in addition of draft tube, got into the settling zone through the cowling panel at last. The flocculation effect is good, more larger flocs are generated, the vertical speed division of floc particles is increased, the interception speed can be reduced under the same removal rate, the retention time is shortened, and the sedimentation area is saved.
The equipment provided by the invention can be used for water plants with higher water inlet SS, and solves the problem that the water inlet SS impacts sewage plants when exceeding the standard of quality standard of sewage discharged into town sewers. The problems that when the SS of inlet water is high, the mud scraper of the sedimentation tank of a water plant is blocked, deformed and damaged are solved. The problems of large abrasion and frequent replacement of the sludge discharge pump of the primary sedimentation tank are solved, and the investment is not increased. The equipment described by the invention is steel integrated equipment, is convenient to install, reduces the construction period, saves the occupied land and relieves the shortage of land for water plants.
The invention not only improves the treatment effect, but also reduces the investment, the retention time of the high-turbidity water in the sedimentation tank is 13-17.0min, the retention time of the traditional sedimentation tank as a primary sedimentation tank is 0.5-2.0h, the retention time of the traditional sedimentation tank as a secondary sedimentation tank is 1.5-4h (25-30 min of a high-efficiency clarification inclined plate sedimentation tank), and the retention time of the traditional sedimentation tank as a sedimentation tank is 1.5-3h in the water supply field. By contrast, the device described in the patent has the shortest hydraulic retention time, namely, the occupied area is saved, the treatment efficiency is high, and the economic benefit is good. The invention has simple operation and stable running state. The invention combines a special sludge discharge machine structure to accommodate a large amount of silt in a short time, and adopts a special sludge discharge pump to greatly reduce the damage rate.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A high turbidity water treatment apparatus, comprising: a first stirrer (3), a guide cylinder (5), a second stirrer (6), a rectifying plate (7) and a settling zone,
the first stirrer (3) is arranged in the coagulation tank, high-turbidity water enters the coagulation tank, the nano flocculant is added, and the high-turbidity water is quickly stirred by the first stirrer (3) to perform coagulation reaction with the nano flocculant;
the guide shell (5) and the second stirrer (6) are arranged in the flocculation tank, the coagulated high-turbidity water enters the guide shell (5), is stirred and lifted out of the guide shell (5) by the second stirrer (6), and enters the precipitation zone through the rectifying plate (7) to undergo precipitation reaction and carry out pollution discharge treatment;
the guide shell (5) is provided with a plurality of baffles.
2. The high turbidity water treatment device according to claim 1, further comprising a water inlet region, wherein the water inlet region comprises a water inlet pipe (1) and a water inlet baffle (2), and the water inlet pipe (1) is connected with the water inlet baffle (2) and connected to the coagulation tank.
3. The high turbidity water treatment device according to claim 1, further comprising a water distribution plate (8), wherein the water distribution plate (8) is connected with the rectifying plate (7), the water distribution plate (8) is provided with water distribution holes and a water passing part, and the water passing part is arranged at the lower end of the water distribution plate (8).
4. The high muddy water treatment device according to claim 1, wherein the settling zone comprises a screw conveying sludge discharging machine (9), a sludge hopper (19) and a slurry sludge discharging pump (20), the flocculated high muddy water is precipitated in the sludge hopper (19) after a precipitation reaction to form flocs which can be removed, the screw conveying sludge discharging machine (9) conveys the flocs which can be removed to the foremost end of the sludge hopper (19), and the flocs are pumped out by the slurry sludge discharging pump (20) and discharged into the sludge storage tank.
5. The high-turbidity water treatment process device according to claim 1, wherein the settling zone further comprises an electric skimming pipe (10), a deslagging pipe (16) and a grid slag frame (18), scum in the high-turbidity water is collected and discharged to the grid slag frame (18) at regular time through the electric skimming pipe (10), and sewage with scum filtered enters a water channel at the bottom of the grid slag frame (18) and is discharged to a structure at the front end of the water inlet zone through the deslagging pipe (16).
6. The high-turbidity water treatment apparatus according to claim 1, wherein the settling zone further comprises a water collection tank (13), an outlet channel (14) and an outlet pipe (15), and the clarified water of the high-turbidity water after flocculation treatment and scum filtration passes through the water collection tank (13), enters the outlet channel (14), and then enters the next treatment structure through the outlet pipe (15).
7. The high-turbidity water treatment apparatus according to claim 1, wherein said sedimentation zone further comprises a sludge level meter (11), said sludge level meter (11) being capable of sludge level monitoring,
when the liquid level of the flocs which can be removed rises to a set threshold A, a slurry sludge pump can be started to discharge sewage;
when the liquid level of the flocs which can be removed is reduced to a set threshold value B, the slurry sludge pump can be closed to stop discharging the sewage.
8. The high-turbidity water treatment device according to claim 4, wherein the settling zone further comprises an emptying pipe (17), when the high-turbidity water treatment device needs to be overhauled, the emptying pipe (17) can lower the liquid level of the settling zone to the opening of the sludge hopper (19), and the residual flocs which can be removed are discharged through a sludge discharge pump (20).
9. The high-turbidity water treatment device according to claim 1, further comprising a guide shell foundation (4), wherein the guide shell foundation (4) has a hydraulic guide effect and is arranged below the guide shell (5), and two sides of the guide shell foundation (4) are arc-shaped.
10. A sewage treatment system characterized in that the high-turbidity water is treated by using the high-turbidity water treatment apparatus according to any one of claims 1 to 9.
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