CN108373206A - A kind of method and device suitable for high rigidity wastewater hardness removing - Google Patents
A kind of method and device suitable for high rigidity wastewater hardness removing Download PDFInfo
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- CN108373206A CN108373206A CN201810496242.2A CN201810496242A CN108373206A CN 108373206 A CN108373206 A CN 108373206A CN 201810496242 A CN201810496242 A CN 201810496242A CN 108373206 A CN108373206 A CN 108373206A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000010865 sewage Substances 0.000 claims abstract description 43
- 238000005189 flocculation Methods 0.000 claims abstract description 42
- 230000016615 flocculation Effects 0.000 claims abstract description 42
- 238000005345 coagulation Methods 0.000 claims abstract description 41
- 230000015271 coagulation Effects 0.000 claims abstract description 41
- 238000004062 sedimentation Methods 0.000 claims abstract description 37
- 230000001112 coagulating effect Effects 0.000 claims abstract description 23
- 238000001556 precipitation Methods 0.000 claims abstract description 23
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 50
- 239000010802 sludge Substances 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 25
- 239000000701 coagulant Substances 0.000 claims description 14
- 239000003814 drug Substances 0.000 claims description 10
- 238000007790 scraping Methods 0.000 claims description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 6
- 159000000013 aluminium salts Chemical class 0.000 claims description 6
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 6
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 6
- 239000004571 lime Substances 0.000 claims description 6
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims 1
- 150000001408 amides Chemical class 0.000 claims 1
- -1 polypropylene Polymers 0.000 claims 1
- 229920001155 polypropylene Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 16
- 239000002131 composite material Substances 0.000 abstract description 2
- 238000003672 processing method Methods 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 21
- 238000010992 reflux Methods 0.000 description 14
- 229910000019 calcium carbonate Inorganic materials 0.000 description 12
- 239000002893 slag Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 238000011049 filling Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000703 anti-shock Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008235 industrial water Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000003311 flocculating effect Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 201000008383 nephritis Diseases 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- OUFRIWNNMFWZTM-UHFFFAOYSA-M sodium arsanilate Chemical compound [Na+].NC1=CC=C([As](O)([O-])=O)C=C1 OUFRIWNNMFWZTM-UHFFFAOYSA-M 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
- C02F5/06—Softening water by precipitation of the hardness using calcium compounds
-
- 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
Landscapes
- 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 present invention provides a kind of method and device suitable for high rigidity wastewater hardness removing, and which solve the undesirable technical problems of the hardness treatment effect for existing waste water hardness processing method, include the following steps：(1) first, sewage passes sequentially through level-one coagulating basin, two-stage coagulation pond and Circulation clarifying pool, carries out just heavy processing, removes the most hardness of sewage, most hardness refers to temporary hardness and part permanent hardness；(2) then, the efficient sedimentation tank that the sewage through just heavy processing is integrated via coagulation area, flocculation zone and precipitation concentration area, carries out post-defecation processing, removes the permanent hardness of sewage.It the composite can be widely applied to sewage treatment field.
Description
Technical field
The present invention relates to a kind of method for treating water and devices, more particularly to a kind of side suitable for high rigidity wastewater hardness removing
Method and device.
Background technology
The hardness water quality index important as one has received widespread attention in drinking water and industrial water.Excessive high hardness
The nephritis of problems or even human body during municipal water use and industrial water can be caused to be recognized as and the hardness in water
It is excessively high related, thus high hardness water except actually very it is necessary to.When the hardness in waste water is more than in field of waste water treatment
When 1000mg/l (with calcium carbonate), such high rigidity waste water be difficult by uniprocessing reach it is desired remove hard effect, so
Usually setting two-stage is removed hard, generally in the first order except hard process will produce a large amount of precipitation of calcium carbonate.High-rate sedimentation tank waterpower is negative
Lotus is high, and pool area is smaller, if handling high rigidity sewage using efficient sedimentation tank, it is heavy to will be unable to bear excessively high calcium carbonate solid
It measures in shallow lake.So level-one is not suitable for using efficient sedimentation tank except hard.
For example, when the hardness of single-stage sewage removal is more than 1000mg/l (with calcium carbonate), efficient sedimentation tank is transported at this time
Guild has the following problems：(1) hardness is excessive causes dosage big；(2) flocculation zone sludge concentration is excessive, it is difficult to realize good
Inside cycle；(3) be easy plug-flow area formed sludge accumulation, it is hardened；(4) there is caking on inclined tube.
And it is hard to use tradition machinery that sedimentation basin is accelerated to be removed as level-one, because machine adds the pool area in pond big, can bear very
High solid precipitation capacity, but machine adds pond itself that there are hydraulic loadings is low, takes up a large area, concentration of suspension is higher asks for water outlet
Topic.
Chinese patent 201520818026.7 discloses a kind of Circulation clarifying pool suitable for high-turbidity sewage processing, should
Circulation clarifying pool mainly by raw water inlet pipeline, reagent filling line, guide shell, circulation port, outlet pipeline, Slag Scraping Device, scrape mud
Machine, sludge hopper, excess sludge mud line and dross collection bucket composition.Between being set by upper taper, lower cylindrical shape and bottom
The Hydraulic Circulation of guide shell away from equal circulation port acts on, and realizes the efficient flocculating of suspended matter.The advantages of Circulation clarifying pool
For：Floor space is few, and upflow velocity is high, to the high treating effect of high-turbidity sewage.
But when the waste water hardness of processing is excessive, the simple combination of Circulation clarifying pool, efficient sedimentation tank can not reach
Hard effect is preferably removed, still can be had the following problems：(1) the bad control of dosage of Circulation clarifying pool, efficient sedimentation tank；
(2) when the hardness of Circulation clarifying pool removal is insufficient, leading to efficient sedimentation tank operation, there are problems；(3) work as Circulation clarifying pool
When handled hardness load is too big, upflow velocity can be influenced, reduces processing speed.
Invention content
The present invention provides one kind for the undesirable technical problem of the hardness treatment effect of existing waste water hardness processing method
The combined method suitable for high rigidity wastewater hardness removing of hardness ideal treatment effect.
For this purpose, the technical scheme is that, include the following steps：
(1) first, sewage passes sequentially through level-one coagulating basin, two-stage coagulation pond and Circulation clarifying pool, carries out just heavy processing, goes
Except the most hardness of sewage, most hardness refers to temporary hardness and part permanent hardness；
(2) then, the efficient sedimentation tank that the sewage through just heavy processing is integrated via coagulation, flocculation and precipitation-concentration, into
Row post-defecation is handled, and removes the permanent hardness of sewage.
Preferably, cycle in being carried out in step (1), inside Circulation clarifying pool；Partial sludge is followed outside Circulation clarifying pool
For ring to level-one coagulating basin, internal circulating load is the 10~20% of inflow.
Preferably, in step (2), flocculation zone carries out interior cycle, and precipitation-enrichment region of efficient sedimentation tank returns partial sludge
It is flow to the flocculation zone of efficient sedimentation tank, the inflow that flows back is 3~6%.
Preferably, it is the first coagulation area, the second coagulation area respectively there are two coagulation areas.
Preferably, in step (1), level-one coagulating basin feeding lime, two-stage coagulation pond adds the coagulation of aluminium salt or molysite
Agent, Circulation clarifying pool add the flocculant and sodium carbonate of polyacrylamide.
Preferably, the coagulant of aluminium salt or molysite is added in the first coagulation area, the second coagulation area adds sodium carbonate, flocculation
Area adds the flocculant of polyacrylamide.
Preferably, the dosage of the second coagulation area sodium carbonate is no more than 1272mg/l.
The present invention also provides devices used in a kind of method suitable for high rigidity wastewater hardness removing, are equipped with circular clarifying
Pond, efficient sedimentation tank, are additionally provided with level-one coagulating basin, two-stage coagulation pond, level-one coagulating basin, two-stage coagulation pond, Circulation clarifying pool and
Efficient sedimentation tank is sequentially connected, and Circulation clarifying pool is also connected to level-one coagulating basin.
Preferably, Circulation clarifying pool is equipped with inhalant region, the first flocculation zone, settling zone and the settling section being sequentially communicated, water inlet
Area is connected with inlet pipeline, and settling section is connected with outlet pipeline, and inlet pipeline is connected to the outlet pipeline in two-stage coagulation pond, water inlet
Pipeline enters pipeline equipped with medicament；Slag Scraping Device, dross collection bucket are set at the top of settling section, settling zone bottom is equipped with mud scraper, collection mud
Bucket, dross collection bucket, sludge hopper have sludge-tank by pipeline connection respectively.
Preferably, efficient sedimentation tank is equipped with the first coagulation area being sequentially communicated, the second coagulation area, the second flocculation zone and sinks
Shallow lake-enrichment region, the second coagulation area are connected to by pipeline with the second flocculation zone, and the second flocculation zone passes through plug-flow wall and precipitation-concentration
Area is connected to；Precipitation-enrichment region is connected to by sludge return pipe with the second flocculation zone, and the second flocculation zone is equipped with guide shell, precipitation-
Have tube settling district above enrichment region, precipitation-enrichment region bottom is equipped with concentrated mud scraper, sludge hopper, sludge hopper by pipeline with
Second flocculation zone is connected to, and tube settling district is communicated with catch basin, and catch basin is connected with outlet pipe.
The beneficial effects of the invention are as follows：Sewage is carried out by level-one coagulating basin, two-stage coagulation pond, Circulation clarifying pool first
Just heavy processing, removes the most hardness of sewage, mainly removes temporary hardness and part permanent hardness；Then by coagulation,
The efficient sedimentation tank post-defecation processing that flocculation, inclined tube separation are integrated, is again removed permanent hardness in sewage.Through first
After heavy processing and post-defecation processing, it is ensured that it is up to standard to go out the water hardness.This combined method is to high hard, high turbid, high suspended matter sewage
High treating effect especially has extraordinary removal effect to the hardness in high rigidity waste water, and the combination has anti-shock loading
Performance is strong, system stability is high, the low advantage of flexible process adjustment, operating cost.
Description of the drawings
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is the structural schematic diagram of Circulation clarifying pool；
Fig. 3 is the structural schematic diagram of efficient sedimentation tank.
Symbol description in figure
1. inlet pipeline；2. medicament filling line；3. the first guide shell；4. circulation port；5. blender；6. Slag Scraping Device；7.
Dross collection bucket；8. dross removes pipeline；9. mud scraper；10. sludge hopper；11. excess sludge sludge pipe；12. sludge-tank；13.
Outlet pipeline；14. water inlet pipe；15. coagulant dosage pipe；16. coagulant blender；17. sodium carbonate adds pipe；18. sodium carbonate
Blender；19. flocculant concentration ring；20. flocculation stirring device；21. tube settling district；22. bottom pipe；23. mud return line
Road；24. sludge hopper；25. catch basin；26. concentrated mud scraper；27. outlet pipe；28. the second guide shell；29. plug-flow wall；A. it intakes
Area；B. flocculation zone；C. settling section；D. settling zone；E. coagulant dosage area；F. sodium carbonate adds area；G. flocculation zone；H. precipitation-
Enrichment region.
Specific implementation mode
The present invention is described further with reference to embodiment.
As shown in Figure 1, the combination pond of the present embodiment is by sequentially connected coagulating basin, Circulation clarifying pool and efficient sedimentation tank group
At.Coagulating basin includes level-one coagulating basin, two-stage coagulation pond, and the water outlet of Circulation clarifying pool is also connected with the water inlet of level-one coagulating basin,
Partial sludge is recycled to level-one coagulating basin, forms outer circulation, internal circulating load is the 10-20% of inflow.
As shown in Fig. 2, Circulation clarifying pool by inlet pipeline 1, medicament filling line 2, the first guide shell 3, circulation port 4, go out
Water lines 13, Slag Scraping Device 6, mud scraper 9, sludge hopper 10, excess sludge mud line 11 and dross collection bucket 7 form.
Circulation clarifying pool center sets the inhalant region A being connected with inlet pipeline 1, and inlet pipeline 1 sets medicament filling line 2.
Inhalant region A is connected to the first guide shell 3 that can form internal cycle, sets blender 5 in the first guide shell 3, both sides set water conservancy diversion
Plate, the bottom standard width of a room in an old-style house is away from equal circulation port 4.The peripheral bottom region of first guide shell 3 is settling zone D, the week of the first guide shell 3
Side upper area is settling section C, and settling section C is connected to outlet pipeline 13.The settling zone bottom surfaces D slope sets the mud scraper of peripheral-traction
9,9 frequency control of mud scraper, the settling zone bottoms D are sludge hopper 10, and sludge hopper 10 is connected to dirt by excess sludge mud line 11
Mud sump 12.Slag Scraping Device 6, dross collection bucket 7 are set at the top of Circulation clarifying pool, dross collection bucket 7 removes pipeline 8 and sludge by dross
Pond 12 is connected to.
As shown in figure 3, efficient sedimentation tank is divided into five parts：Coagulant dosage area E, sodium carbonate add area F, flocculation zone G,
Precipitation-enrichment region H, five parts are interconnected successively.Sodium carbonate adds area F and is led by the second of bottom pipe 22 and flocculation zone G
Flow cartridge 28 is connected to, and precipitation-enrichment region H is connected to by sludge return pipe 23 with flocculation zone G, forms cycle.
Coagulant dosage area E is connected to water inlet pipe 14, and water inlet pipe 14 is connected to the outlet pipeline 13 of Circulation clarifying pool.Coagulation
Agent adds area E equipped with coagulant dosage pipe 15, coagulant blender 16, and sodium carbonate adds area F and adds pipe 17, carbon equipped with sodium carbonate
Sour sodium blender 18.Flocculation zone G is equipped with the second guide shell 28 that can form internal cycle, flocculant concentration ring 19, and second leads
There is flocculation stirring device 20 in flow cartridge 28.Sodium carbonate adds area F and is connected to the second guide shell 28 by bottom pipe 22.Flocculation zone G
It is connected to precipitation-enrichment region H by plug-flow wall 29.There are tube settling district 21, bottom to be equipped with concentration and scrape above precipitation-enrichment region H
Mud machine 26, sludge hopper 24, sludge hopper 24 is connected to by sludge return pipe 23 with the second guide shell 28 of flocculation zone G, by part
Sludge reflux is to flocculation zone G, reflux ratio 4-8%.Tube settling district 21 is connected to catch basin 25, and catch basin 25 is connected with water outlet
Pipe 27.
This combined method is divided into just heavy processing and post-defecation to the removal of the waste water water hardness and handles two steps.First, lead to
Level-one coagulating basin, two-stage coagulation pond, Circulation clarifying pool are crossed to sewage progress just heavy processing, removes the most hardness of sewage, master
If removing temporary hardness and part permanent hardness；Then, the efficient sedimentation tank being integrated is detached by coagulation, flocculation, inclined tube
Post-defecation processing is carried out to sewage, the permanent hardness in sewage is removed again.It is handled, at post-defecation through just sinking
Reason, it can be ensured that it is up to standard to go out the water hardness.
Below to using the combination pond to be described further except hard two-stage process：
1) it just sinks and handles：Lime is added in level-one coagulating basin, when sewage is by level-one coagulating basin, the temporary hardness in sewage
CaCO is generated with lime reaction3Precipitation, with flow CaCO3Precipitation flows to two-stage coagulation pond；In two-stage coagulation pond be added aluminium salt or
The coagulant of person's molysite forms more tiny alumen ustum in advantageous water, and then sewage enters back into Circulation clarifying pool；Sewage from into
The inlet pipeline 1 of pool A enters Circulation clarifying pool, and flocculant polyacrylamide and sodium carbonate is added by medicament filling line 2,
Permanent hardness in sewage reacts with sodium carbonate, forms CaCO3Precipitation, sewage enter the first guide shell of Circulation clarifying pool
In 3, under the Hydraulic Circulation effect of the stirring action and the first guide shell 3 of blender 5, the efficient wadding of suspended matter, alumen ustum is realized
It is solidifying.Sewage and flocculant are in the cyclic process of the first guide shell 3, the flocculation zone B (conical section) on 3 top of the first guide shell
Ripe flco is formed, ripe flco turns to settling zone D outside 3 upper end of the first guide shell, and D is along Circulation clarifying pool in settling zone
Bottom of pond precipitate, under the action of mud scraper 9 enter sludge hopper 10, and by excess sludge mud line 11 enter sludge
Pond 12；When Circulation clarifying pool is run, Slag Scraping Device 6 is opened, strikes off the dross in pond face, dross enters dross collection bucket 7, and by floating
Slag is removed pipeline 8 and is entered in sludge-tank 12；Treated, and sewage passes through the outlet pipeline of settling section C in the upper end of Circulation clarifying pool
13 enter efficient sedimentation tank.
The first guide shell 3 that Circulation clarifying pool therein is equipped with forms interior cycle, and sludge-tank 12 connects with level-one coagulating basin
It is logical to form outer circulation, partial sludge is recycled to previous stage coagulating basin, internal circulating load is the 10-20% of inflow.
2) post-defecation is handled：Sewage enters coagulant dosage area E from water inlet pipe 14, the coagulant of aluminium salt or molysite from
It adds pipe 15 to add, through the quick stirring 3-5min of coagulant blender 16, then sewage enters sodium carbonate and adds area F, sodium carbonate
It is added from pipe 17 is added, after sodium carbonate blender 18 quickly stirring 10-15min, the Ca in waste water2+、CO3 2-It is formed and is generated
CaCO3Precipitation goes the permanent hardness in water removal.The bottom pipe 22 that sewage adds area F by sodium carbonate enters the of flocculation zone G
Two guide shells 28 add flocculant polyacrylamide solution by flocculant concentration pipe 19, are mixed slowly through flocculation stirring device 20
After 10-12min so that be formed by alumen ustum precipitation and become larger along speed aggregation, then enter precipitation-sludge condensation by plug-flow wall 29
Area H, through tube settling district 21, clear water is discharged after collecting to catch basin 25 by outlet pipe 27；Concentrated mud scraper 26 will be deposited in pond
The sludge condensation at bottom is scraped into sludge hopper 24, by sludge return pipe 23 flow back 4-8% sludge to the bottom of flocculation zone G,
Ensure sludge concentration in the second guide shell 28, be conducive to the formation of big alumen ustum in sewage, improve medicament utilization rate, reduces medicament and throw
Dosage.
Embodiment 1 (flow back 10%-20% when comparison just heavy processing)
Anhui chemical plant secondary clarifier effluent water quality is as follows：(hardness, basicity calcium carbonate)
Lime-Injecting amount is identical, 200mg/l, and it is also all mutually 461mg/l that sodium carbonate amount, which is added,
The water hardness that settles out at the beginning of when reflux ratio different value (with calcium carbonate) compares：
Conclusion：
1. comparison show that recycling effluent is not with obvious effects than there is the effect of reflux poor；
2. outlet effect changes little substantially when reflux ratio is 10% or more, it is basic that the water hardness is gone out when more than 25%
It is constant, it is contemplated that reflux ratio can be arranged to 10%-20% for economic problems, can determine reflux ratio according to practical water quality.
3. be not provided with reflux, water outlet SS is obviously bigger than setting reflux, and when reflux is arranged in 10%-20% timeliness
Fruit is best.
When being not provided with reflux, it is desirable to reach required lime consumption and sodium carbonate amount when upper table reflux numerical result
Such as following table：
When reflux ratio 10-20% is arranged, lime medicine dosage can reduce 20% or so, and sodium carbonate dosage can subtract
Few 10% or so.
Embodiment 2
Certain sewage treatment plant's water quality such as following table (hardness, basicity are with calcium carbonate)：
The pilot plant of sewage through the invention is carried out except hard processing, by just heavy processing and post-defecation processing setting
Different dosages are compared, and specific processing scheme see the table below：
Pilot plant see the table below except the specific corresponding dosage of hard processing：
Final outflow water data see the table below (mg/L) after processing：
Scheme 1,2,3 is qualified, when the dosage for the sodium carbonate that post-defecation processing is added is more than 1272mg/l,
High-rate sedimentation can not reach expected removal effect, go out total hardness of water further off qualified index；The operation side in pilot process
When case 4,5, since the dose that sodium carbonate is added in the efficient sedimentation tank handled in post-defecation is excessive, cause the sludge of flocculation zone dense
It spends greatly, efficient sedimentation tank cannot carry out internal cycle well, affect except hard effect, and it is also higher to be discharged SS.This hair
Bright Circulation clarifying pool settling zone area is bigger, and the sedimentation time can be longer so that the precipitation of calcium carbonate of formation and water are more preferable
Ground detaches；It is not provided with inclined tube separator inside Circulation clarifying pool, inclined tube fouling will not be formed and influence to be discharged.Utilize this hair
The Circulation clarifying pool in first heavy processing in bright breaks the limitation of potassium permanganate composites own characteristic.First heavy place through the invention
Reason and post-defecation are handled, and the temporary hardness and permanent hardness in sewage have obtained good removal, final so that going out the water hardness
It is up to standard.
The present invention specifically has following features：
(1) it is more than 1000mg/l (with calcium carbonate) or more more high rigidity difficulty that can receive processing removal sewage hardness
The sewage of reason；
(2) by high rigidity wastewater hardness removing step-by-step processing, it is divided into just heavy processing and post-defecation processing；First pass through circular clarifying
Pond removes most hardness, mainly removes temporary hardness and partial permanent hardness, reduces the place of High-rate sedimentation below
Manage load, it is ensured that the normal operation of rear end efficient sedimentation tank；
(3) the settling zone area of Circulation clarifying pool is bigger, can preferably precipitate, and is not provided with inclined tube area, will not
It causes caking, block, broken High-rate sedimentation since own characteristic limits received processing hardness limit value；
(4) the integrated precipitation concentration and sludge reflux of efficient sedimentation tank keeps sludge structure fine and close, does not need independent dirt
Mud thickener not only reduces floor space, but also has saved the energy；
(5) Circulation clarifying pool is both provided with inner-outer circulation with efficient sedimentation tank, maintains the flco of higher concentration, both improved
Medicament utilization rate, reduces added amount of chemical, also improves effluent quality and sludge structure.
The present invention especially has the hardness in high rigidity sewage high hard, high turbid, high suspended matter good sewage processing effect
Extraordinary removal effect, and the combination is strong with anti-shock loading performance, system stability is high, flexible process adjustment, operation
Advantage at low cost.
The only above person, only specific embodiments of the present invention, when cannot be limited the scope of implementation of the present invention with this, therefore
The displacement of its equivalent assemblies, or according to equivalent variations made by scope of patent protection of the present invention and modification, all should still belong to power of the present invention
The scope that sharp claim is covered.
Claims (10)
1. a kind of method suitable for high rigidity wastewater hardness removing, characterized in that include the following steps：
(1) first, sewage passes sequentially through level-one coagulating basin, two-stage coagulation pond and Circulation clarifying pool, carries out just heavy processing, goes to decontaminate
The most hardness of water, most hardness refer to temporary hardness and part permanent hardness；
(2) then, the efficient sedimentation tank that the sewage through just heavy processing is integrated via coagulation, flocculation and precipitation-concentration, carries out two
Secondary clearing processing, removes the permanent hardness of sewage.
2. a kind of method suitable for high rigidity wastewater hardness removing according to claim 1, which is characterized in that the step (1)
In, interior cycle is carried out inside the Circulation clarifying pool；Partial sludge the level-one is recycled to outside the Circulation clarifying pool to mix
Solidifying pond, internal circulating load are the 10~20% of inflow.
3. a kind of method suitable for high rigidity wastewater hardness removing according to claim 1 or claim 2, which is characterized in that the step
(2) in, the flocculation zone of the efficient sedimentation tank carry out in cycle, precipitation-enrichment region of the efficient sedimentation tank is by partial sludge
It is back to the flocculation zone of the efficient sedimentation tank, the inflow that flows back is 3~6%.
4. a kind of method suitable for high rigidity wastewater hardness removing according to claim 3, which is characterized in that the coagulation area has
Two, be the first coagulation area, the second coagulation area respectively.
5. a kind of method suitable for high rigidity wastewater hardness removing according to claim 1, which is characterized in that the step
(1) in, the level-one coagulating basin feeding lime, the two-stage coagulation pond adds the coagulant of aluminium salt or molysite, the cycle
Clarifying basin adds the flocculant and sodium carbonate of polyacrylamide.
6. a kind of method suitable for high rigidity wastewater hardness removing according to claim 4, which is characterized in that described first is mixed
The coagulant of aluminium salt or molysite is added in coagulation zone, second coagulation area adds sodium carbonate, and the flocculation zone adds polypropylene
The flocculant of amide.
7. a kind of method suitable for high rigidity wastewater hardness removing according to claim 6, which is characterized in that described second is mixed
The dosage of coagulation zone sodium carbonate is no more than 1272mg/l.
8. being suitable for device used in the method for high rigidity wastewater hardness removing as described in the appended claim 1, it is equipped with circular clarifying
Pond, efficient sedimentation tank, characterized in that be additionally provided with level-one coagulating basin, two-stage coagulation pond, the level-one coagulating basin, two-stage coagulation pond,
Circulation clarifying pool and efficient sedimentation tank are sequentially connected, and the Circulation clarifying pool is also connected to the level-one coagulating basin.
9. the device according to claim 8 suitable for high rigidity wastewater hardness removing, which is characterized in that the Circulation clarifying pool
Equipped with the inhalant region being sequentially communicated, the first flocculation zone, settling zone and settling section, the inhalant region is connected with inlet pipeline, described
Settling section is connected with outlet pipeline, and the inlet pipeline is connected to the outlet pipeline in the two-stage coagulation pond, the inlet pipeline
Enter pipeline equipped with medicament；Set Slag Scraping Device, dross collection bucket at the top of the settling section, the settling zone bottom be equipped with mud scraper,
Sludge hopper, the dross collection bucket, sludge hopper have sludge-tank by pipeline connection respectively.
10. the device according to claim 8 suitable for high rigidity wastewater hardness removing, which is characterized in that the High-rate sedimentation
Pond is equipped with the first coagulation area, the second coagulation area, the second flocculation zone and the precipitation-enrichment region being sequentially communicated, second coagulation area
It is connected to second flocculation zone by pipeline, second flocculation zone is connected to by plug-flow wall with the precipitation-enrichment region；Institute
It states precipitation-enrichment region to be connected to second flocculation zone by sludge return pipe, second flocculation zone is equipped with guide shell, institute
Stating has tube settling district above precipitation-enrichment region, the precipitation-enrichment region bottom is equipped with concentrated mud scraper, sludge hopper, the collection
Bucket is connected to by pipeline with second flocculation zone, and the tube settling district is communicated with catch basin, and the catch basin is connected with
Outlet pipe.
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| CN109574307A (en) * | 2018-12-16 | 2019-04-05 | 金科环境股份有限公司 | Remove the device of whole hardness in reverse osmosis concentrated water |
| CN109592815A (en) * | 2018-12-16 | 2019-04-09 | 金科环境股份有限公司 | The processing system of reverse osmosis concentrated water with high permanent hardness |
| CN109592816A (en) * | 2018-12-16 | 2019-04-09 | 金科环境股份有限公司 | Eliminate the device and method of reverse osmosis concentrated water permanent hardness and temporary hardness |
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| CN114560577A (en) * | 2022-01-28 | 2022-05-31 | 国网河北省电力有限公司电力科学研究院 | High-hardness, high-turbidity and acid-base wastewater co-treatment method |
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