CN1948177A - Method of treating low temperature low turbidity water by high density active mud sediment back flow - Google Patents
Method of treating low temperature low turbidity water by high density active mud sediment back flow Download PDFInfo
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- CN1948177A CN1948177A CN 200610134242 CN200610134242A CN1948177A CN 1948177 A CN1948177 A CN 1948177A CN 200610134242 CN200610134242 CN 200610134242 CN 200610134242 A CN200610134242 A CN 200610134242A CN 1948177 A CN1948177 A CN 1948177A
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- water
- sludge
- low
- turbidity
- reflux
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000013049 sediment Substances 0.000 title description 9
- 239000010802 sludge Substances 0.000 claims abstract description 40
- 238000010992 reflux Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 238000010907 mechanical stirring Methods 0.000 claims abstract description 6
- 238000005189 flocculation Methods 0.000 claims abstract description 5
- 230000016615 flocculation Effects 0.000 claims abstract description 5
- 238000004062 sedimentation Methods 0.000 claims abstract description 3
- 229940037003 alum Drugs 0.000 claims abstract 5
- 239000000701 coagulant Substances 0.000 claims description 24
- 239000000126 substance Substances 0.000 claims description 18
- 238000005345 coagulation Methods 0.000 claims description 4
- 230000015271 coagulation Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 238000005352 clarification Methods 0.000 claims 1
- 239000002893 slag Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000001556 precipitation Methods 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 3
- 229940079593 drug Drugs 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000003311 flocculating effect Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 230000001112 coagulating effect Effects 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 241000628997 Flos Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000000703 anti-shock Effects 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000005446 dissolved organic matter Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000007614 solvation Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
高密度活性泥渣回流处理低温低浊水的方法，涉及一种水处理技术，本发明采用外部污泥回流系统把化学活性污泥从污泥浓缩区提升到反应池进水管，与原水混合；然后通过机械搅拌混合室，接着进入反应絮凝室；从穿孔墙到斜板沉淀区矾花能保持完整，并且产生的矾花质均、密度高；采用高效的斜板沉淀，高密度矾花在此得到很好的沉淀；能有效地完成污泥浓缩，出水水质稳定，耐冲击负荷。本发明适合于低温低浊水深度处理，使该构筑物具有占地小，水流条件好，反应效率高，用药少，管理方便的特点。
The method for treating low-temperature and low-turbidity water by high-density activated sludge reflux relates to a water treatment technology. The present invention adopts an external sludge reflux system to lift chemically activated sludge from the sludge concentration area to the inlet pipe of the reaction tank and mix it with raw water; Then through the mechanical stirring mixing chamber, then enter the reaction flocculation chamber; from the perforated wall to the inclined plate precipitation area, the alum flowers can be kept intact, and the produced alum flowers are of uniform quality and high density; using efficient inclined plate precipitation, the high-density alum flowers are in In this way, a good sedimentation is obtained; the sludge concentration can be effectively completed, the effluent water quality is stable, and the impact load is resistant. The invention is suitable for advanced treatment of low-temperature and low-turbidity water, so that the structure has the characteristics of small footprint, good water flow conditions, high reaction efficiency, less medication and convenient management.
Description
Technical field
The present invention relates to a kind of water technology, particularly a kind of method with treating low temperature low turbidity water by high density active mud sediment back flow.
Background technology
One of difficult point of water treatment is exactly the processing of low temperature and low turbidity water.When low-temperature and low turbidity, the coagulating sedimentation performance of turbid matter reduces significantly, and at this moment, most of water factory is in order to form the thicker flocs unit that is easy to precipitate and separate, and the method that adopts is exactly the dosage that increases coagulating agent usually.But, the increase of coagulant charging quantity, not only waste also will cause problems such as sludge quantity increase, the shortening of filter cycle, the rising of coagulating agent residual volume simultaneously, bring very big burden for the maintenance and management of water purification facilities.
The reason that low temperature and low turbidity water is difficult to purify:
1. the influence of water temperature
Low temperature is very big to the influence of coagulating agent hydrolysis rate, low water temperature is slowed down hydrolysis reaction speed, the viscosity of water at low temperature is big, internal resistance between liquid layer is big, unit time unit volume particulate collision frequency reduces, be unfavorable for the growth of tiny particle in water collision, cohesion and flocs unit, flocculation rate and particle sinking speed also reduce.Low water temperature weakens the pedesis of particulate, and the energy of thermal motion between water molecules weakens, and is unfavorable for collision cohesion between particulate.Water temperature is low, and the colloidal solvation strengthens, hydration shell thickening around the particle, and adhesion strength reduces, and hinders its cohesion.Gas Solubility is big during low temperature, and the flocs unit density of formation reduces, and gas dissolved is adsorbed on around the flocs unit in a large number, also is unfavorable for its precipitation.
2. the influence of particulate loading in the water
The source water turbidity is low more under the cold condition, and the medicine consumption that water supply process is in operation is high more, and intractability is also big more.Research is thought in any water body, the number of times of endocorpuscular quantity of guarantor unit's volume and effective collision is vital, particulate has more collision opportunity in the coagulation process and good coagulating treatment effect is based on, since low when turbid unit volume endoparticle density little, particulate loading is very low in the water, cause the part micro-floccule to lose the condition of collision coalescence, certainly will influence normally carrying out of coagulating treatment process.
Summary of the invention
The objective of the invention is to overcome the prior art above shortcomings, a kind of devices and methods therefor with treating low temperature low turbidity water by high density active mud sediment back flow is provided.This method adopts chemically reactive mud to reflux and adds chemical agent and work in coordination with and improve its removal to pollutents such as organism, SS in water, especially the removal efficient of dissolved organic matter, reduce the usage quantity of chemical agent and reduce the quantity discharged of mud, reduce processing cost.
The objective of the invention is to be achieved through the following technical solutions:
The method for the treatment of low temperature low turbidity water by high density active mud sediment back flow, its treating processes is:
After the water that enters water-in adds coagulating agent by the coagulant dosage mouth, together enter line mixer, again by coagulant aids add mouthful add the coagulant aids Pre-coagulation after, enter the mechanical stirring mixing section with chemical reflux mud, and then through the reaction flocculating chamber, the alumen ustum that occurs enters into settling section from perforated wall at a slow speed, alumen ustum accumulates mud and concentrates in the settling pond bottom, be drained in the mud-removing bucket then, partial concentration mud is back to the reaction tank inlet from enrichment region with the active sludge reflux pump, sloping plate unit is reverse-flow swash plate, the settling region precipitates remaining alumen ustum, vertical plate by the swash plate downside carries out the waterpower distribution, and primary water goes out water channel by one and reclaims, and throw out is deposited in the bottom of settling pond, also the zone is concentrated in this section for the mud that forms, mud scraper by Scraping device collects mud, is back to the reaction tank ingress, and excess sludge is discharged by the excess sludge discharge mouth.Pass through filter again from going out the primary water that water channel comes out, at last by the water outlet water outlet.
The method of aforesaid treating low temperature low turbidity water by high density active mud sediment back flow, its enrichment region is divided into two-layer: one deck is positioned at mud-removing bucket top, one deck is positioned at its underpart, the upper strata is concentrating of refluxing chemical mud, lower floor is the place that produces a large amount of thickened sludges, and the concentration of thickened sludge is at least 20g/L.
The method of aforesaid treating low temperature low turbidity water by high density active mud sediment back flow, its refluxing chemical mud are mixed the back suspended substance and are controlled at 30～50mg/L for best with former water.
The method of aforesaid treating low temperature low turbidity water by high density active mud sediment back flow, from going out primary water turbidity value that water channel comes out less than 3NTU, then through filter, by the water outlet water outlet, delivery turbidity is less than 1NTU at last.
Advantage of the present invention and effect are:
1. running cost of the present invention is low, compares with existing technology, saves 10%～30% medicament.
2. the present invention is provided with sloping plate unit, separates producing the fine water outlet by swash plate, and delivery turbidity is all less than 3NTU.
3. the ability of anti-shock loading of the present invention is strong, and the influence that changed by flow or pollution load is little.
4. sludge discharged concentration height of the present invention can reach 20～230g/L, has reduced the treatment capacity of follow-up mud.
Description of drawings
Accompanying drawing of the present invention is the floor map of embodiment.
Number in the figure: 1. water-in, 2. coagulant dosage mouth, 3. line mixer, 4. coagulant aids adds mouth, 5. mechanical stirring mixing section, 6. reaction flocculating chamber, 7. perforated wall, 8. sloping plate unit 9. goes out water channel, 10. filter tank, 11. water outlets, 12. high density sludge districts, 13. Scraping device, 14. filter material layers, 15. mud valves, 16. the excess sludge discharge mouth, 17. active sludge reflux pumps
Embodiment
As shown in the figure, the method for the treatment of low temperature low turbidity water by high density active mud sediment back flow, its employed equipment includes coagulant dosage mouth 2, line mixer 3, coagulant aids add mouth 4, mechanical stirring mixing section 5, reaction flocculating chamber 6, perforated wall 7, sloping plate unit 8, go out water channel 9, filter tank 10, high density sludge district 12, Scraping device 13, excess sludge discharge mouth 16, parts such as active sludge reflux pump 17.Its treating processes is:
The water that enters water-in 1 adds coagulating agent by coagulant dosage mouth 2, together enter line mixer 3 again by coagulant aids add mouthfuls 4 add coagulant aids (Pre-coagulation) after, enter mechanical stirring mixing section 5 with chemical reflux mud.Wherein have an impeller to be positioned at the cylinder of center constant-current type, the effect of this impeller is to make current uniform mixing in the reaction tank, and provides dynamic condition for flocculation.And then through reaction flocculating chamber 6, it is a flocculation basin at a slow speed, and its effect is exactly to produce the floss that particle is big, density is real, reaches the rapid precipitation in the settling region.The alumen ustum that occurs enters into settling section from perforated wall 7 at a slow speed, can avoid damaging alumen ustum like this or produce vortex, guarantees that a large amount of suspended solids distinguishes uniform deposition at this.Alumen ustum accumulates mud and concentrates in the settling pond bottom.Enrichment region is divided into two-layer: one deck is positioned at mud-removing bucket top, and one deck is positioned at its underpart.The upper strata is concentrating of refluxing chemical mud, and mud is several hours in the residence time of this layer.Be drained in the mud-removing bucket then.The mud ingress on mud-removing bucket top is bigger, need not fluting.Partial concentration mud is back to the reaction tank inlet from enrichment region with active sludge reflux pump 17.Return sludge ratio will be controlled in certain scope, and refluxing chemical mud mixes back SS and is controlled at 30～50mg/L for best with former water.Lower floor is the place that produces a large amount of thickened sludges, and the concentration of thickened sludge is at least 20g/L.Sloping plate unit 8 is reverse-flow swash plate, and the settling region precipitates remaining alumen ustum, and the vertical plate by the swash plate downside carries out waterpower and distributes.These plates are divided into swash plate independently several groups effectively to improve the current uniformly distributing.Needn't use any preferential channel, reaction precipitation can be finished in the best condition.Primary water goes out water channel 9 by one and reclaims.Throw out is deposited in the bottom of settling pond, and also the zone is concentrated in this section for the mud of formation.Mud scraper by Scraping device 13 collects mud, is back to the reaction tank ingress, and excess sludge is by 16 dischargings of excess sludge discharge mouth.From going out primary water turbidity value that water channel 9 comes out, filtering through filter tank 10 then less than 3NTU.By water outlet 11 water outlets, delivery turbidity is less than 1NTU (nephelometric turbidity unit) at last.
This embodiment is according to the common process treatment scheme, and coagulating agent adopts polymerize aluminum chloride (PAC), and dosage is 30mg/L; Coagulant aids adopts high polymer polyacrylamide (PAM), dosage is 1mg/L, the factory's secondary effluent of disposing of sewage records technology the clearance of chemical oxygen demand (COD) (COD), biochemical oxygen demand (BOD) (BOD), suspended substance (SS), turbidity, total phosphorus (TP) is respectively 30%, 40%, 60%, 70%, 75%.And adopting above-mentioned technical process: coagulating agent adopts PAC, and dosage is 20mg/L; Coagulant aids adopts high polymer polyacrylamide (PAM), dosage is 0.5mg/L, refluxing chemical mud mixes back SS and is controlled at 30～50mg/L for best with former water, record technology the clearance of COD, BOD, SS, turbidity, TP is respectively 50%, 50%, 80%, 90%, 85%.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610134242 CN1948177A (en) | 2006-11-10 | 2006-11-10 | Method of treating low temperature low turbidity water by high density active mud sediment back flow |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610134242 CN1948177A (en) | 2006-11-10 | 2006-11-10 | Method of treating low temperature low turbidity water by high density active mud sediment back flow |
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| Publication Number | Publication Date |
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| CN1948177A true CN1948177A (en) | 2007-04-18 |
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| CN 200610134242 Pending CN1948177A (en) | 2006-11-10 | 2006-11-10 | Method of treating low temperature low turbidity water by high density active mud sediment back flow |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415338C (en) * | 2007-06-01 | 2008-09-03 | 华电水处理技术工程有限公司 | Method and equipment for purifying recirculated cooling water or town B-grade sewage |
| CN101376071B (en) * | 2008-10-09 | 2011-04-20 | 江苏江达生态科技有限公司 | Technique for separating mud and water in river and lake deposit |
| CN102417257A (en) * | 2011-10-24 | 2012-04-18 | 沈阳建筑大学 | A technical method for the treatment and recovery of brewery process wastewater |
| CN102441297A (en) * | 2011-10-10 | 2012-05-09 | 浙江省海洋开发研究院 | Sludge refluxing and flocculating precipitation tank |
| CN102765816A (en) * | 2012-07-12 | 2012-11-07 | 中国矿业大学 | Absorption/precipitation/hydrolyzation synchronization sewage treatment process |
| CN102078709B (en) * | 2009-11-27 | 2015-08-26 | 上海市政工程设计研究总院 | A kind of high density active charcoal sedimentation basin and depositing technology thereof |
| CN109336234A (en) * | 2018-11-30 | 2019-02-15 | 贵州楚天两江环境股份有限公司 | A kind of efficient dephosphorization technique |
| CN110745927A (en) * | 2019-11-18 | 2020-02-04 | 宜兴市荣盛达环保有限公司 | Coupling separation device for removing SS (suspended substance) in catalytic cracking flue gas desulfurization wastewater |
-
2006
- 2006-11-10 CN CN 200610134242 patent/CN1948177A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415338C (en) * | 2007-06-01 | 2008-09-03 | 华电水处理技术工程有限公司 | Method and equipment for purifying recirculated cooling water or town B-grade sewage |
| CN101376071B (en) * | 2008-10-09 | 2011-04-20 | 江苏江达生态科技有限公司 | Technique for separating mud and water in river and lake deposit |
| CN102078709B (en) * | 2009-11-27 | 2015-08-26 | 上海市政工程设计研究总院 | A kind of high density active charcoal sedimentation basin and depositing technology thereof |
| CN102441297A (en) * | 2011-10-10 | 2012-05-09 | 浙江省海洋开发研究院 | Sludge refluxing and flocculating precipitation tank |
| CN102441297B (en) * | 2011-10-10 | 2014-01-08 | 浙江省海洋开发研究院 | Sludge reflux flocculation sedimentation tank |
| CN102417257A (en) * | 2011-10-24 | 2012-04-18 | 沈阳建筑大学 | A technical method for the treatment and recovery of brewery process wastewater |
| CN102765816A (en) * | 2012-07-12 | 2012-11-07 | 中国矿业大学 | Absorption/precipitation/hydrolyzation synchronization sewage treatment process |
| CN109336234A (en) * | 2018-11-30 | 2019-02-15 | 贵州楚天两江环境股份有限公司 | A kind of efficient dephosphorization technique |
| CN110745927A (en) * | 2019-11-18 | 2020-02-04 | 宜兴市荣盛达环保有限公司 | Coupling separation device for removing SS (suspended substance) in catalytic cracking flue gas desulfurization wastewater |
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