CN109292921A - A kind of formula and application method of the dense media powder for water treatment - Google Patents
A kind of formula and application method of the dense media powder for water treatment Download PDFInfo
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- CN109292921A CN109292921A CN201811196090.0A CN201811196090A CN109292921A CN 109292921 A CN109292921 A CN 109292921A CN 201811196090 A CN201811196090 A CN 201811196090A CN 109292921 A CN109292921 A CN 109292921A
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- 239000000843 powder Substances 0.000 title claims abstract description 102
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 64
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000002156 mixing Methods 0.000 claims abstract description 46
- 238000004062 sedimentation Methods 0.000 claims abstract description 24
- 238000004064 recycling Methods 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000701 coagulant Substances 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 9
- 239000010802 sludge Substances 0.000 claims abstract description 9
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 9
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 238000005336 cracking Methods 0.000 claims abstract description 7
- 239000000696 magnetic material Substances 0.000 claims abstract description 7
- 230000001376 precipitating effect Effects 0.000 claims abstract description 7
- 239000006228 supernatant Substances 0.000 claims abstract description 7
- 238000005189 flocculation Methods 0.000 claims abstract description 6
- 230000016615 flocculation Effects 0.000 claims abstract description 6
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 20
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 claims description 16
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 10
- 239000000047 product Substances 0.000 claims description 10
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 8
- 239000008399 tap water Substances 0.000 claims description 8
- 235000020679 tap water Nutrition 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 230000001954 sterilising effect Effects 0.000 claims description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- 229940056319 ferrosoferric oxide Drugs 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical group [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 4
- 229910015372 FeAl Inorganic materials 0.000 claims description 3
- 229910002555 FeNi Inorganic materials 0.000 claims description 3
- 229910005347 FeSi Inorganic materials 0.000 claims description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- VAWNDNOTGRTLLU-UHFFFAOYSA-N iron molybdenum nickel Chemical compound [Fe].[Ni].[Mo] VAWNDNOTGRTLLU-UHFFFAOYSA-N 0.000 claims description 3
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 2
- 159000000013 aluminium salts Chemical class 0.000 claims description 2
- 229910000329 aluminium sulfate Inorganic materials 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 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 claims 1
- 230000003647 oxidation Effects 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 235000020188 drinking water Nutrition 0.000 abstract description 6
- 239000003651 drinking water Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000001914 filtration Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 235000012041 food component Nutrition 0.000 abstract 1
- 239000005417 food ingredient Substances 0.000 abstract 1
- 235000013350 formula milk Nutrition 0.000 description 14
- 230000001112 coagulating effect Effects 0.000 description 7
- 239000012535 impurity Substances 0.000 description 7
- 229910001385 heavy metal Inorganic materials 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000010865 sewage Substances 0.000 description 5
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 4
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 238000000108 ultra-filtration Methods 0.000 description 3
- 101150054854 POU1F1 gene Proteins 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000009287 sand filtration Methods 0.000 description 2
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 description 2
- 229910001948 sodium oxide Inorganic materials 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 235000020610 powder formula Nutrition 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- -1 which enter Substances 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a kind of formula of dense media powder for water treatment, innovative point is: technical indicator includes three main matter food ingredient, magnetic material content and particle diameter distribution aspects.The application method of dense media powder of the invention, innovative point are: the raw water of micro- pollution to be processed is discharged after last sterilized pond disinfection followed by level-one mixing pit, second level mixing pit, three-level mixing pit, sedimentation basin, sand filter.Dense media powder cooperates coagulant, active carbon and flocculation aid to use, the compound wadding body of the dense media that three-level mixing pit gradually generates enters sedimentation basin with water flow and is precipitated, supernatant enters sand filter filtering, filtering is discharged after being discharged sterilized pond disinfection, the sludge of the compound wadding body containing dense media directly flows back into second level mixing pit in sedimentation basin precipitating rear portion, a part is recycled through cracking flossing machine, dense media recycling machine dense medium powder, and dense media powder after the recovery enters the recycling of second level mixing pit.Dense media powder of the present invention can meet Government Health department to being related to the technical requirements of drinking water, and all lower than conventional dense media powder production cost and use cost.
Description
Technical field
The present invention relates to water-treatment technology fields, are particularly suitable for the materializing strategy field of water treatment, and in particular to
A kind of formula and application method of the dense media powder for water treatment.
Background technique
Coagulating sedimentation is widely applied process in a kind of water treatment field.The technique is thrown in raw water to be processed
Add the medicament (coagulant/flocculation aid) with cohesion ability, the subtle suspension grain in water is made by mechanisms such as adsorption bridgings
The impurity such as son, colloidal particle or pollutant form floc sedimentation and precipitate, to reach purifying water effect.The technology is widely used in sewage
Processing and water treatment process.
Dense media coagulation-settlement process (also referred to as magnetic medium coagulation-settlement process) is just to grow up in recent years simultaneously rapidly
Obtain a kind of very fast coagulating sedimentation technology of extensive concern, related patents so far nearly 100.The technology is in water process
It adds in coagulation process dense media powder (also referred to as magnetic medium powder), can be improved after forming high density composite floccule body with accelerated sedimentation
Deposition efficiency.Dense media powder passes through the recovered rear recycling of subsequent recovery process.Since dense media powder is answered in tap water field
It is exceeded etc. potentially possible that used time, there are heavy metal ion, is related to the license of paddling of national health administrative responsibile institution, dense media
Coagulation-settlement process only has application at present in China sewage treatment field, only studies but there is no in water treatment field
The practical application example of scale.
Due to being brand new technical, had the following problems currently on the market suitable for the dense media powder of sewage treatment:
1. the dense media powder source of goods is also considerably less, existing dense media powder grain size dispersity is big, and magnetic material content is low, thinner dense medium
Matter powder and nonmagnetics fine particle float the later process toward water process coagulating sedimentation with sewage, to the key in later process
Equipment, such as deep-bed filter, filtering cloth filtering pool, centrifugal sludge dewatering machine, there is biggish adverse effect, cause equipment blocking, mill
Damage the consequences such as serious.
2. that there are non-magnetic impurities is more for dense media powder finished product, the rate of recovery is low in actual use for dense media powder, both right
Later process causes adverse effect, and increases user's operating cost.
Due to license of not paddling, the dense media powder that can be used for water treatment field in the market is even more to look for not at present
It arrives.Patent 201710223746.2 provides the production and application method of a kind of dense media powder of water process, can be used for certainly
Carry out water treatment field, but since its production process is too long, technical requirements are excessively harsh, especially the partial size of dense medium powder divides
Cloth is strict between 200 ~ 300 mesh, so that the waste material that dense media powder generates in the actual production process is too many, product cost
Height is unfavorable for the promotion and application of dense media coagulating sedimentation technology.
Summary of the invention
It is an object of the invention to be directed to market in urgent need and the deficiencies in the prior art, one kind is provided and is suitable for water process, especially
It is the dense media powder of water treatment formula and dense media powder water treatment field application method.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of formula of the dense media powder for water treatment, main innovation point are: dense media powder finished product of the invention
Middle magnetic material content accounting reaches 99.9%, and dense media powder particle size range of the invention is 25 ~ 63 μm, the institute in the particle size range
Dense media powder accounts for gross mass 85 ~ 100% are stated, dense media powder of the invention is by weight percentage mainly consist of the following components:
Ferroso-ferric oxide (Fe3O4) 72.00 ~ 93.00%
Silica (SiO2) 1.00 ~ 10.00%
Titanium dioxide (TiO2) 0.50 ~ 5.00%
Aluminum oxide (Al2O3) 0.10 ~ 5.00%
Calcium oxide (CaO) 0.10 ~ 5.00%
Batch materials 0.01 ~ 5.00%.
Each ratio all refers in the formula measures after the drying of dense media powder, the dense media powder produced according to the formula
Finished product, magnetic material content are higher.
Further, batch materials of the invention are nickel oxide (NiO) or chrome green (Cr2O3) or manganese oxide
(MnO) either zinc oxide (ZnO) either sodium oxide molybdena (NaO) either iron sial (FeSiAl) either iron aluminium (FeAl) or iron silicon
(FeSi) either iron nickel molybdenum FeNi(Mo) one of or it is several.
Further, dense media powder of the invention is prepared via multiple working procedures such as broken, grinding, sub-sieve, Magneto separates.
A kind of application method of the dense media powder for water treatment, innovative point are: the following steps are included:
(a) raw water of micro- pollution to be processed is entered into level-one mixing pit by pumping forces or gravity flow, is added in level-one mixing pit
Coagulant and Powdered Activated Carbon are opened blender and are stirred；
(b) after a step process, enter second level mixing pit containing the gravity flow of the raw water of coagulant and Powdered Activated Carbon, it is mixed in second level
It closes and adds dense media powder in pond, open blender and be stirred；
(c) b step after treatment, the water gravity flow containing dense media powder, coagulant and Powdered Activated Carbon enter three-level mixing pit,
The dosing coagulant in three-level mixing pit is opened blender and is stirred, exists by the compound wadding body of the dense media of core of dense media powder
It is gradually generated in three-level mixing pit；
(d) step c after treatment, the water containing the compound wadding body of dense media, which enters in sedimentation basin, to be precipitated；
(e) after precipitating, it is divided into the sludge of supernatant and the compound wadding body containing dense media, the supernatant enters sand filter mistake
Filter, and tap water finished product is formed after the disinfection of subsequent sterilization pool；
(f) sludge of the compound wadding body containing dense media directly flows back into second level mixing pit in sedimentation basin precipitating rear portion, a part
Dense media powder is recycled through cracking flossing machine and dense media recycling machine, dense media powder after the recovery enters the recycling of second level mixing pit.
Further, the G value of the blender in step a of the invention is 300 ~ 1000s-1, mixing time is 1 ~ 4min, this
The coagulant of invention selects molysite or aluminium salt or the one or more for polymerizeing salt, and the concentration that adds of coagulant of the invention is 4
~10%.
Further, the stirring G value of the blender in step b of the invention is 150 ~ 550s-1, mixing time be 1 ~
4min；The mass concentration of dense media powder of the invention remains 1 ~ 10%.
Further, the stirring G value of blender is 40 ~ 250s in step c of the invention-1, mixing time is 2 ~ 7min, this
The flocculation aid of invention selects polyacrylamide, and the dosage of polyacrylamide of the invention is 0.5 mg/L~2.5mg/L.
Further, one, two, three mixing pit in step a, b, c of the invention can be respectively set to two lattice or more lattice
Form, every lattice configure one or more blender.
Further, the motor speed of cracking flossing machine is 700 ~ 3000r/min, dense medium of the invention in step f of the invention
The maximum magnetic induction of the cylinder surface of matter recycling machine is greater than 400mT, and the rotation speed of roller is when recycling dense media
10~60r/min。
Beneficial effects of the present invention
1. the dense media powder for water treatment of the invention is suitable for tap water and sewage treatment, partial size at 25 ~ 63 μm, make
The waste material that generates in process of production of dense media powder it is less thus production cost it is lower, be easily recycled, to subsequent handling
Influence smaller, raising drinking water treatment efficiency.
2. the dense media powder magnetic that the dense media powder for water treatment of the invention is produced according to inventive formulation
Property object content be 99.9%, the rate of recovery of dense media powder can be higher in actual use, thus the operation of water treatment at
This also can be lower, and the influence to the later process of coagulating sedimentation is also smaller.
3. in the formula for the dense media powder of water treatment of the invention, batch materials be nickel oxide (NiO) or
Chrome green (Cr2O3) either manganese oxide (MnO) either zinc oxide (ZnO) either sodium oxide molybdena (NaO) or iron sial
(FeSiAl) either iron aluminium (FeAl) either iron silicon (FeSi) either iron nickel molybdenum FeNi(Mo) one of or it is several, both can be with
The temperature performance characteristic of dense media powder is effectively ensured, so that dense media powder recycles under varying environment at all seasons via dense media
The recovery efficiency of machine is high；It is passivated dense media powder microparticle surfaces sufficiently simultaneously, minimal amount of suspension dense media powder is avoided to wad a quilt with cotton
Body is lost with water flow into subsequent ultrafiltration operation stage, is formed and is injured to ultrafiltration membrane surface, has effectively delayed making for ultrafiltration membrane
Use the service life.
4. the present invention uses dense media powder gradually to participate in flocculation reaction as wadding core, flocculation reaction speed is accelerated, is shortened
Wadding body forms the time, improves the mass density of wadding body, so that wadding body, which enters after sedimentation basin, also accelerates settling of floccus speed
Degree, improves treatment effect.And since dense media recycling machine is using the progress high efficiente callback of high-gradient permanent magnetic field dense medium powder, make
Obtaining dense media powder can be recycled, and save operating cost.
5. in the application method for the dense media powder of water treatment of the invention, while one, two, three mixing pit is set
It is set to two lattice or multi-grid form, hydraulic detention time has been appropriately extended, so that stirring is more abundant, enhances coagulation effect.Due to
Dense media powder takes part in precipitation process of coagulation, so that the time required for wadding body is formed, settled is few more many than conventional coagulating sedimentation,
Therefore, even if hydraulic detention time has been appropriately extended in two lattice or the mixing pool structure of multi-grid form setting, generally, dense media is mixed
Retrogradation shallow lake still can save for 30 ~ 80% time than conventional coagulating sedimentation.
6. the tap water handled with dense media powder of the invention, in the effluent index of tap water heavy metal ion or other
The incrementss that the content of impurity meets " standards for drinking water quality " GB 5749-2006, heavy metal ion or other impurities are full
The requirement of foot " Drinking Water transmission & distribution wetting system and protective materials health safety evaluation norms " GB/T 17219.
Detailed description of the invention
Attached drawing 1 is a kind of one kind of application method of the dense media powder for water treatment of the present invention in actual use
Process flow chart.
1- level-one mixing pit；2- second level mixing pit；3- three-level mixing pit；4- sedimentation basin；5- sand filter；6- sterilization pool；7-
Dense media recycling machine；8- cracking flossing machine.
Specific embodiment
It is an object of the invention to be directed to market in urgent need and the deficiencies in the prior art, provide a kind of suitable for water treatment
Dense media powder formula and dense media powder water treatment field application method.
Embodiment 1
A kind of formula of the dense media powder for water treatment, by weight percentage mainly consist of the following components:
Ferroso-ferric oxide (Fe3O4) 85.00%
Silica (SiO2) 7.50%
Titanium dioxide (TiO2) 2.90%
Aluminum oxide (Al2O3) 1.70%
Calcium oxide (CaO) 1.50%
Nickel oxide (NiO) 0.05%
Other components 1.25%
Magnetic in the dense media powder finished product being prepared according to above-mentioned formula by multiple working procedures such as broken, grinding, sub-sieve, Magneto separates
Property object content accounting reach 99.9%, wherein dense media powder particle size range is 25 μm, and the dense media powder in the particle size range accounts for
The 88% of gross mass.
Embodiment 2
A kind of formula of the dense media powder for water treatment, by weight percentage mainly consist of the following components:
Ferroso-ferric oxide (Fe3O4) 93.00%
Silica (SiO2) 2.00%
Titanium dioxide (TiO2) 0.50%
Aluminum oxide (Al2O3) 0.10%
Calcium oxide (CaO) 0.20%
Chrome green (Cr2O3) 4.20%.
Reached according to above-mentioned formula by grinding magnetic material content accounting in the dense media powder finished product that sub-sieve is prepared
99.9%, wherein dense media powder particle size range is 63 μm, and the dense media powder in the particle size range accounts for the 92.3% of gross mass.
Embodiment 3
A kind of formula of the dense media powder for water treatment, by weight percentage mainly consist of the following components:
Ferroso-ferric oxide (Fe3O4) 82.50%
Silica (SiO2) 5.50%
Titanium dioxide (TiO2) 2.75%
Aluminum oxide (Al2O3) 2.55%
Calcium oxide (CaO) 2.55%
Manganese oxide (MnO) 4.15%.
Reached according to above-mentioned formula by grinding magnetic material content accounting in the dense media powder finished product that sub-sieve is prepared
99.9%, wherein dense media powder particle size range is 44 μm, and the dense media powder in the particle size range accounts for the 99.9% of gross mass.
By embodiment 1 ~ 3 it is found that a kind of dense media powder for water treatment provided by the present invention, by originally matching
The appropriate control of Fang Chengfen, the heavy metal ion dialysis that dense media powder can be made to be formed in water, with dense media powder of the invention
The tap water of processing, the content of heavy metal ion or other impurities meets " Drinking Water health in the effluent index of tap water
Standard " GB 5749-2006, heavy metal ion or other impurities incrementss meet " Drinking Water transmission & distribution wetting system and protection
Material health safety evaluation norms " GB/T 17219 requirement.
Embodiment 4
Using THE LOWER YANGTZE VALLEY section river as raw water to be processed, the turbidity of the raw water is that 50-60NTU, COD are 3 ~ 5mg/L, according to
It is secondary flow through level-one mixing pit 1, second level mixing pit 2, three-level mixing pit 3, sedimentation basin 4, sand filter 5 after, it is sterilized after water outlet, do two
Group comparative test, respectively experimental group and control group, every group of experiment is in triplicate, the specific steps are as follows:
(a) be separately added into 10mg/L molysite and active carbon in the level-one mixing pit 1 of experimental group and control group, open blender into
Row stirring, the G value of blender are 400s-1, mixing time 2min.
(b) in second level mixing pit 2, the common dense media powder of 100mg/L is added in control group, and the present invention is added in experimental group
The dense media powder of formula, remaining condition is the same, opens blender and is stirred, and the G value of blender is 200s-1, mixing time is
2min。
(c) in three-level mixing pit 3, control group and experimental group, which are separately added into, is added 0.5mg/L polyacrylamide, when stirring
Between be 4min.
(d) subsequent experimental group and control group raw water, which enter, precipitates 4 in sedimentation basin, the dirts such as sludge, colloidal impurity in raw water
After contaminating object gradually cohesion forming wadding body in mixing pits at different levels, wadding body precipitating is realized in sedimentation basin 4,4 residence time of sedimentation basin is
10min designs upward flow flow velocity 20m/h, takes sedimentation basin water outlet, sand filtration water outlet to be analyzed, test result is as shown in table 1 below.
(e) after precipitating, it is divided into the sludge of supernatant and dense media powder, the supernatant enters sand filter filtering 5, warp
Sterilization pool 6 is discharged after sterilizing.
(f) sludge of the powder containing dense media precipitates rear portion in sedimentation basin 4 and directly flows back into second level mixing pit 2, a part
Dense media powder is recycled through cracking flossing machine 8 and dense media recycling machine 7, dense media powder after the recovery enters the recycling of second level mixing pit 2
1 experimental group of table and controlled analysis result
| Technical indicator | Control group | Experimental group |
| Sand setting delivery turbidity (NTU) | 1.5~1.9 | 1.1~1.5 |
| Sand setting is discharged COD (mg/L) | 2.7~2.9 | 2.0~2.2 |
| Sand filtration delivery turbidity (NTU) | 0.08~0.22 | 0.04~0.06 |
| Sterilization pool delivery turbidity (NTU) | 0.11~0.15 | 0.04~0.05 |
Table in comparison compared with common dense media powder, has it is found that when carrying out water process using the dense media powder being formulated in the present invention
There is better water treatment efficiency.
Above-described embodiment is presently preferred embodiments of the present invention, is not a limitation on the technical scheme of the present invention, as long as
The technical solution or application that can be realized on the basis of the above embodiments without creative work are regarded as falling into this specially
The rights protection scope of benefit.
Claims (9)
1. a kind of formula of the dense media powder for water treatment, it is characterised in that: magnetic material in the dense media powder finished product
Content accounting reaches 99.9%, and the dense media powder particle size range is 25 ~ 63 μm, and the dense media powder in the particle size range accounts for
The 85 ~ 100% of gross mass, the dense media powder is by weight percentage mainly consist of the following components:
Ferroso-ferric oxide (Fe3O4) 72.00 ~ 93.00%
Silica (SiO2) 1.00 ~ 10.00%
Titanium dioxide (TiO2) 0.50 ~ 5.00%
Aluminum oxide (Al2O3) 0.10 ~ 5.00%
Calcium oxide (CaO) 0.10 ~ 5.00%
Batch materials 0.01 ~ 5.00%.
2. a kind of formula of dense media powder for water treatment according to claim 1, it is characterised in that: described to match
Material matter is nickel oxide (NiO) or chrome green (Cr2O3) either manganese oxide (MnO) either zinc oxide (ZnO) or oxidation
Sodium (NaO) either iron sial (FeSiAl) either iron aluminium (FeAl) either iron silicon (FeSi) or iron nickel molybdenum FeNi(Mo) in one
Kind is several.
3. a kind of formula of dense media powder for water treatment according to claim 1, it is characterised in that: described heavy
Medium powder is prepared via multiple working procedures such as broken, grinding, sub-sieve, Magneto separates.
4. a kind of application method of the dense media powder for water treatment, it is characterised in that: the following steps are included:
(a) raw water of micro- pollution to be processed is entered into level-one mixing pit by pumping forces or gravity flow, is added in level-one mixing pit
Coagulant and Powdered Activated Carbon are opened blender and are stirred；
(b) through a step process, enter second level mixing pit containing the gravity flow of the raw water of coagulant and Powdered Activated Carbon, mixed in second level
Dense media powder is added in pond, is opened blender and is stirred；
(c) b step after treatment, the water gravity flow containing dense media powder, coagulant and Powdered Activated Carbon enter three-level mixing pit,
The dosing coagulant in three-level mixing pit is opened blender and is stirred, exists by the compound wadding body of the dense media of core of dense media powder
It is gradually generated in three-level mixing pit；
(d) step c after treatment, the water containing the compound wadding body of dense media, which enters in sedimentation basin, to be precipitated；
(e) after precipitating, it is divided into the sludge of supernatant and the compound wadding body containing dense media, the supernatant enters sand filter mistake
Filter, and tap water finished product is formed after the disinfection of subsequent sterilization pool；
(f) sludge of the compound wadding body containing dense media directly flows back into second level mixing pit, another portion in sedimentation basin precipitating rear portion
Lease making cracking flossing machine and dense media recycling machine recycle dense media powder, and dense media powder after the recovery enters the recycling of second level mixing pit.
5. a kind of application method of dense media powder for water treatment according to claim 4, it is characterised in that: institute
The G value for stating the blender in step a is 300 ~ 1000s-1, mixing time is 1 ~ 4min, and the coagulant selects molysite or aluminium salt
Or the one or more of polymerization salt, the concentration that adds of the coagulant is 4~10%.
6. a kind of application method of dense media powder for water treatment according to claim 4, it is characterised in that: institute
The stirring G value for stating the blender in step b is 150 ~ 550s-1, mixing time is 1 ~ 4min；The mass concentration of the dense media powder
Remain 1 ~ 10%.
7. a kind of application method of dense media powder for water treatment according to claim 4, it is characterised in that: institute
The stirring G value for stating blender in step c is 40 ~ 250s-1, mixing time is 2 ~ 7min, and the flocculation aid selects polyacrylamide,
The dosage of the polyacrylamide is 0.5 mg/L~2.5mg/L.
8. a kind of application method of dense media powder for water treatment according to claim 4, it is characterised in that: institute
Two lattice or multi-grid form can be respectively set to by stating one, two, three mixing pit in step a, b, c, and every lattice configure one or more
Blender.
9. a kind of application method of dense media powder for water treatment according to claim 4, it is characterised in that: institute
The motor speed for stating cracking flossing machine in step f is 700 ~ 3000r/min, the maximum magnetic strength of the cylinder surface of the dense media recycling machine
Intensity is answered to be greater than 400mT, the rotation speed of roller is 10 ~ 60r/min when recycling dense media.
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|---|---|---|---|---|
| US4697744A (en) * | 1984-10-16 | 1987-10-06 | Sumitomo Metal Industries, Ltd. | Process for the production of iron oxide fine powder |
| CN204939139U (en) * | 2015-08-28 | 2016-01-06 | 太平洋水处理工程有限公司 | A kind of high-efficiency dense-medium matter/gac coagulating sedimentation water treatment device |
| CN106186433A (en) * | 2016-08-18 | 2016-12-07 | 北京万邦达环保技术股份有限公司 | A kind of brine waste loads flocculation except hard method |
| CN106915809A (en) * | 2017-04-07 | 2017-07-04 | 太平洋水处理工程有限公司 | A kind of formula of dense media powder for water process, preparation method and application method |
| CN107721211A (en) * | 2017-11-10 | 2018-02-23 | 山西双良国环科技有限公司 | RO phases efficiently separates recovery method in a kind of slag |
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2018
- 2018-10-15 CN CN201811196090.0A patent/CN109292921A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4697744A (en) * | 1984-10-16 | 1987-10-06 | Sumitomo Metal Industries, Ltd. | Process for the production of iron oxide fine powder |
| CN204939139U (en) * | 2015-08-28 | 2016-01-06 | 太平洋水处理工程有限公司 | A kind of high-efficiency dense-medium matter/gac coagulating sedimentation water treatment device |
| CN106186433A (en) * | 2016-08-18 | 2016-12-07 | 北京万邦达环保技术股份有限公司 | A kind of brine waste loads flocculation except hard method |
| CN106915809A (en) * | 2017-04-07 | 2017-07-04 | 太平洋水处理工程有限公司 | A kind of formula of dense media powder for water process, preparation method and application method |
| CN107721211A (en) * | 2017-11-10 | 2018-02-23 | 山西双良国环科技有限公司 | RO phases efficiently separates recovery method in a kind of slag |
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