CN108439669A - Silica minimizing technology in a kind of water - Google Patents
Silica minimizing technology in a kind of water Download PDFInfo
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- CN108439669A CN108439669A CN201810193761.1A CN201810193761A CN108439669A CN 108439669 A CN108439669 A CN 108439669A CN 201810193761 A CN201810193761 A CN 201810193761A CN 108439669 A CN108439669 A CN 108439669A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 147
- 239000000377 silicon dioxide Substances 0.000 title claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 65
- 238000005516 engineering process Methods 0.000 title claims abstract description 23
- 239000002351 wastewater Substances 0.000 claims abstract description 35
- 238000005189 flocculation Methods 0.000 claims abstract description 31
- 230000016615 flocculation Effects 0.000 claims abstract description 31
- 239000012535 impurity Substances 0.000 claims abstract description 30
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011575 calcium Substances 0.000 claims abstract description 28
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 28
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011777 magnesium Substances 0.000 claims abstract description 26
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 26
- 238000001556 precipitation Methods 0.000 claims abstract description 20
- 238000006213 oxygenation reaction Methods 0.000 claims abstract description 16
- 239000007787 solid Substances 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 238000005374 membrane filtration Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 7
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 235000014413 iron hydroxide Nutrition 0.000 claims abstract description 6
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 238000000975 co-precipitation Methods 0.000 claims abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 22
- 238000007667 floating Methods 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000013049 sediment Substances 0.000 claims description 6
- 238000005273 aeration Methods 0.000 claims description 5
- 239000010802 sludge Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000007717 exclusion Effects 0.000 claims description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 2
- 239000000920 calcium hydroxide Substances 0.000 claims description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 2
- 239000003153 chemical reaction reagent Substances 0.000 claims description 2
- 239000002244 precipitate Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000001427 coherent effect Effects 0.000 abstract description 2
- 230000035800 maturation Effects 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract description 2
- 239000008187 granular material Substances 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 11
- 238000002474 experimental method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000036647 reaction Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 241000790917 Dioxys <bee> Species 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000010908 plant waste Substances 0.000 description 2
- 229910003978 SiClx Inorganic materials 0.000 description 1
- KCZFLPPCFOHPNI-UHFFFAOYSA-N alumane;iron Chemical compound [AlH3].[Fe] KCZFLPPCFOHPNI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- JBJWASZNUJCEKT-UHFFFAOYSA-M sodium;hydroxide;hydrate Chemical compound O.[OH-].[Na+] JBJWASZNUJCEKT-UHFFFAOYSA-M 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000002699 waste material 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- 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
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)
- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses silica minimizing technologies in a kind of water, include mainly：(1) add oxygenation pretreatment, make silica and calcium, magnesium addition colloidization in water；(2) electric flocculation reaction precipitation：It is electrolysed as anode plate using aluminium sheet, iron plate or ferro-aluminum mixing pole plate and generates aluminium hydroxide or iron hydroxide floccule body, adsorb the silica formed after alkaline cleaning and calcium, magnesium addition colloidal solid, and co-precipitation；(3) air supporting cleans：Air supporting removal of impurities will be carried out through step 2 treated waste water, and go in water removal to be difficult to the subtle silica dioxide granule precipitated and other impurity particles；(4) membrane filtration：By step 3, treated that waste water is filtered with film filter, realizes that the depth-type filtration to silica impurity in water is handled.It is reasonable, coherent that integrated artistic removes thorough silica, maturation, flow scheme design, calcium in water, magnesium addition can also be effectively removed, clear water water quality after improvement processing, clear water recycle is worth after raising processing, anti impulsion load ability is strong, has preferable prospects for commercial application.
Description
Technical field
The present invention relates to water treatment field, more particularly to silica minimizing technology in a kind of water.
Background technology
With the surge of social progress, industrial development and population, problem of environmental pollution constantly aggravates, especially water resource
Pollution so that the available freshwater resources of the mankind are fewer and fewer.Scientist is estimated to 2025, will have 2/3 people in the world
Mouth faces serious shortage of water resources problem, or even by the insufficient danger of living water.Shortage in order to solve water resource is asked
Topic, for the overall strategy of water resource, countries in the world have all turned to comprehensive, sustainable water resource and have utilized.How to improve
Utilization ratio of water and the recycling efficiency of water have become one vital task of all trades and professions.
In industrial water, many industries are all limited by silica in water, from the maximum cooling system of water consumption
Content to silica in high-precision electronics industry and the draining of reverse osmosis concentrated water generally reaches 40-100mg/L,
Want the zero-emission for reaching waste water and reuse, it is necessary to which depth removal is carried out to the silica in waste water.
Currently, for this kind of wastewater treatment, both at home and abroad there are no the example of recycling, existing method includes that coagulation removes
Silicon, chemical flocculation are except silicon, amberplex are except single minimizing technologies such as silicon.Wherein, traditional chemical flocculation easily causes two
Secondary pollution, is unable to reach the purpose of depth removal silica, and ion exchange membrane processing is not only expensive but also to water inlet
Water quality requirement is higher.Also, above-mentioned single treatment method because in water in practical water treatment procedure silica and other impurities contain
Amount comes and go, and causes silica removal device operating load big, and anti impulsion load ability is weak, and final silica is caused to go
Pay no attention to except effect and thinks over a problem.
Invention content
For the above-mentioned deficiency in the presence of the prior art, present invention aims at silica in a kind of water of offer to remove
Method, the minimizing technology according to the present invention, can in the pending waste water of all kinds of water quality of flexible adaptation silica depth removal,
And calcium in waste water, magnesium addition are effectively removed simultaneously, the water hardness is reduced, is realized to waste water effective recycling.
In order to achieve the above-mentioned object of the invention, the present invention provides following technical schemes：
Silica minimizing technology in a kind of water, includes the following steps：
(1) add oxygenation pretreatment：Alkaline reagent is added into pending waste water, makes silica and calcium, magnesium addition glue in water
Body；
(2) electric flocculation reaction precipitation：Step 1 treated waste water is subjected to electric flocculation processing, utilizes aluminium sheet, iron plate or aluminium
Iron mixing pole plate is electrolysed as anode plate generates aluminium hydroxide or iron hydroxide floccule body, the aluminium hydroxide or iron hydroxide wadding
The silica and calcium, magnesium addition colloidal solid formed after solidifying body absorption alkaline cleaning, and co-precipitation；
(3) air supporting cleans：Treated that waste water carries out air supporting removal of impurities with air supporting exclusion device for step 2, continue by water not
The colloidal solid for being in time for precipitation further removes, wherein during the electric flocculation reacts precipitation process, not flocculation completely
Silica and calcium, the magnesium addition colloidal solid of precipitation can further be precipitated in air-floating apparatus bottom；
(4) membrane filtration：By step 3, treated that waste water is filtered with film filter, realizes to silica in water
The depth-type filtration of impurity is handled.
According to above-mentioned technical proposal, the present invention will add oxygenation pretreatment, the electric flocculation chemical reaction precipitation method, clean with air supporting,
Membrane filtration removal of impurities physical partition method combines successively, first adds alkali to adjust into pending waste water, by most of silica in waste water
With calcium, magnesium addition colloidization, while increasing hydroxyl content in pending waste water, then reacts precipitation step with step (2) electric flocculation
It is rapid mutually to cooperate with, spy silica and calcium, magnesium addition colloidal solid more than high using hydroxyl content in waste liquid after alkaline cleaning
Point effectively facilitates the generation of aluminium hydroxide or iron hydroxide floccule body and the aluminium hydroxide floccule body in electrolytic process and exists
In generating process, the adsorption precipitation of silica and calcium, magnesium addition colloidal solid is acted on, is improved to most of dioxy in waste water
SiClx and calcium, magnesium addition flocculation sediment effect.Electric flocculation is reacted to the waste water after precipitation process again, air supporting is used in step (3)
Exclusion device carry out air supporting removal of impurities, in air supporting dedoping step, on the one hand can by waste water can not flocculation sediment subtle dioxy
Silicon carbide particle and other impurity particles carry out Bubble-floating Method removal；On the other hand, precipitation process process is reacted in the electric flocculation
In, silica and calcium, the magnesium addition colloidal solid of incomplete flocculation sediment can be in the further precipitation process in air-floating apparatus bottom.
Waste water after air supporting removes silica and other impurities floc particle, then through step (4) membrane filtration, to silica in water
Impurity carries out depth-type filtration processing, realizes the recovery processing to waste water.Integrated artistic removes thorough silica, maturation, flow
Reasonable design links up, moreover it is possible to effectively remove calcium, magnesium addition in water, clear water after processing is greatly improved in clear water water quality after improvement processing
Recycle is worth.And entire technique successively increases silica in water and other impurities removal precision, and mutual cooperation makes
With, can the impurity contents such as flexible adaptation difference silica wastewater treatment, anti impulsion load ability is strong, has preferable industry
Application prospect.
Further, in described plus oxygenation pretreatment step, available alkaline matter is one in sodium hydroxide, calcium hydroxide
Kind is a variety of.
Further, in described plus oxygenation pretreatment step, the pH=9-14, preferably pH=10- of control plus alkali rear solution
12.Silica hydrolysising balance in waste water is destroyed, makes in waste water the impurity such as silica and calcium, magnesium under above-mentioned alkaline condition,
It is converted into colloidal solid state, convenient for step (2) electric flocculation precipitation process, co-precipitation detaches.If pH is too high or too low,
Silica sections is caused to dissolve, to reduce silica removal rate.
Further, under stirring, it carries out adding oxygenation pretreatment.Be more advantageous to after alkaline cleaning in waste water silica and
The impurity colloidal solid such as calcium, magnesium.
Further, in electric flocculation reacts settling step, the Faradaic current is the direct current of 40-50A, 50-60V.
Further, in the air supporting removal step, control aeration flow velocity is the ﹕ 1 of gas-water ratio=10.
Further, in the membrane filtration step, control aqueous solution passes through film filter with the flow velocity of 5-10m/h.
Further, the silica and calcium, magnesium addition isolated through electric flocculation reaction precipitation precipitate, and can pass through blowdown
Pipe is discharged into sludge concentration tank and is handled.
Further, in the air supporting removal step, continue the silica that flocculation sediment generates in air-floating apparatus bottom
And calcium, magnesium addition precipitation, it can be discharged into sludge concentration tank and be handled by blow-off pipe.
Compared with prior art, beneficial effects of the present invention：
1, silica minimizing technology in a kind of water according to the present invention, will add oxygenation pretreatment, electric flocculation chemistry anti-
The precipitation method are answered, is combined, is efficiently used at electric flocculation reaction absorption plus alkali successively with air supporting removal of impurities, membrane filtration removal of impurities physical partition method
The colloidal solid formed after reason, and co-precipitation are convenient for later stage lock out operation, realize to most of calcium in waste water, magnesium addition and
Silica efficiently separates；The high precision physical impurity-removing methods such as air supporting removal of impurities, membrane filtration are further combined, to in water
Silica and other impurities carry out depth removal, clear water water quality condition after very big improvement processing, and improve its actual recovered and answer
With value.
2, further, silica minimizing technology in a kind of water of the present invention, integrated artistic remove silica thoroughly,
It is ripe, flow scheme design is reasonable, coherent, mutual coordinated between each step, can flexible adaptation in impurity such as different silica
The wastewater treatment of content, anti impulsion load ability is strong, has preferable prospects for commercial application.
3, compared with existing other technologies, silica minimizing technology in a kind of water of the present invention has to ring
Border is friendly, and economy is good, the advantages that being easily managed and operate.
Description of the drawings：
Fig. 1 is the step flow chart of silica minimizing technology in a kind of water described in the embodiment of the present invention 1.
Specific implementation mode
With reference to test example and specific implementation mode, the present invention is described in further detail.But this should not be understood
It is only limitted to embodiment below for the range of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that the content of present invention is realized
The range of invention.
Embodiment 1
As shown in Figure 1, by 0.5m3Reverse osmosis concentrated water add oxygenation pretreatment, specific method to be added into reverse osmosis concentrated water
Sodium hydroxide solution, and control and add alkali rear solution pH=8-10, then promoted to inside electric flocculation reactor by pumping, progress electricity
Solution reaction, is 100cm with monolithic area2Aluminium flake be pole plate, five groups of cathode-anode plates are inserted into jointly in pending wastewater disposal basin, are kept
Anode and cathode face, and every group of cathode-anode plate distance is controlled under the conditions of 10mm, to pass to 48V/29A electric currents, cell reaction
10min, then enters back into inside air-floating apparatus and carries out the separation of suspended matter, and the aeration flow velocity for controlling the air-floating apparatus is
30m3/h.Finally, make through air-floating apparatus treated aqueous solution, with the flow velocity of 5m/h, depth-type filtration to be carried out into membrane filtration system
After be discharged.
Specific experiment testing result is as shown in table 1：
Table 1
| Content of material | Test advancing water | It is discharged after experiment |
| Impurity suspended matter | 8mg/L | ≤4mg/L |
| Silica | 34.4mg/L | 1.98mg/L |
By experimental result as can be seen that the removal rate of silica is 94%, and it can effectively reduce calcium in waste water, magnesium etc.
Impurity suspension content, achieves the desired results.
Embodiment 2
Take certain chemical enterprise catalyst plant waste water 1m3It carries out adding oxygenation pretreatment, specific method is that hydrogen-oxygen is added into waste water
Change calcium solution, and control and add alkali rear solution pH=10-12, then promoted to inside electric flocculation reactor by pumping, is electrolysed
Reaction, is 100cm with monolithic area2Aluminium flake be pole plate, five groups of cathode-anode plates are inserted into jointly in pending wastewater disposal basin, keep sun
Pole and cathode face, and every group of cathode-anode plate distance is controlled under the conditions of 10mm, to pass to 50V/35A electric currents, cell reaction
12min, then enters back into inside air-floating apparatus and carries out the separation of suspended matter, and the aeration flow velocity for controlling the air-floating apparatus is
45m3/h.Finally, make through air-floating apparatus treated aqueous solution, with the flow velocity of 5-7m/h, depth mistake to be carried out into membrane filtration system
It is discharged after filter.
Specific experiment testing result is as shown in table 2：
Table 2
| Content of material | Test advancing water | It is discharged after experiment |
| Impurity suspended matter | 16.8mg/L | ≤8mg/L |
| Silica | 44.5mg/L | 2.6mg/L |
By experimental result as can be seen that the removal rate of silica is 94.2%, and it can effectively reduce calcium in waste water, magnesium
Equal impurity suspension content, achieves the desired results.
Embodiment 3
Take certain chemical enterprise catalyst plant waste water 1.5m3, carry out adding oxygenation pretreatment, hydroxide be specifically added into waste water
Calcium, and control and add alkali rear solution pH=12-14, then promoted to inside electric flocculation reactor by pumping, progress cell reaction, with
Monolithic area is 100cm2Aluminium flake be pole plate, five groups of cathode-anode plates are inserted into jointly in pending wastewater disposal basin, keep anode with it is cloudy
Pole face, and controlling under the conditions of every group of cathode-anode plate distance is 10mm, passes to 60V/40A electric currents, cell reaction 30min, then
It enters back into inside air-floating apparatus and carries out the separation of suspended matter, the aeration flow velocity for controlling the air-floating apparatus is 30-40m3/h.Most
Afterwards, make to be discharged after carrying out depth-type filtration into membrane filtration system with the flow velocity of 7-9m/h through air-floating apparatus treated aqueous solution.
Specific experiment testing result is as shown in table 3：
Table 3
| Content of material | Test advancing water | It is discharged after experiment |
| Impurity suspended matter | 16.2mg/L | ≤6.8mg/L |
| Silica | 63.25mg/L | 3.2mg/L |
By experimental result as can be seen that the removal rate of silica is 94.9%, and it can effectively reduce calcium in waste water, magnesium
Equal impurity suspension content, achieves the desired results.
Comparative example 1
The comparative example is arranged with reference to embodiment 1, and compared with Example 1, difference lies in will by the reaction time of electric flocculation
For 3min, remaining operation all same.
Specific experiment testing result is as shown in table 4：
Table 4
| Content of material | Test advancing water | It is discharged after experiment |
| Impurity suspended matter | 7.5mg/L | ≤4mg/L |
| Silica | 38.6mg/L | 16.5mg/L |
By experimental result as can be seen that it is 57.3% that the removal rate of silica, which is remarkably decreased, it is unable to reach in water
Silica depth removal effect.
Comparative example 2
The comparative example is arranged with reference to embodiment 1, compared with Example 1, difference lies in, in adding oxygenation pretreatment step,
Reduce be added sodium hydroxide solution dosage, make plus oxygenation pretreatment after aqueous solution pH within the scope of 7-8.Remaining operation is homogeneous
Together.
Specific experiment testing result is as shown in table 5：
Table 5
| Content of material | Test advancing water | It is discharged after experiment |
| Impurity suspended matter | 8.9mg/L | ≤7mg/L |
| Silica | 41.2mg/L | 13.8mg/L |
By experimental result as can be seen that it is 66.5% that the removal rate of silica, which is remarkably decreased, it is unable to reach in water
Silica depth removal effect.
Claims (9)
1. silica minimizing technology in a kind of water, which is characterized in that include the following steps：
(1) add oxygenation pretreatment：Alkaline reagent is added into pending waste water, makes silica and calcium, magnesium addition colloidization in water；
(2) electric flocculation reaction precipitation：Step 1 treated waste water is subjected to electric flocculation processing, it is mixed using aluminium sheet, iron plate or ferro-aluminum
It closes pole plate and is electrolysed generation aluminium hydroxide or iron hydroxide floccule body, the aluminium hydroxide or iron hydroxide floccule body as anode plate
The silica and calcium, magnesium addition colloidal solid formed after absorption alkaline cleaning, and co-precipitation；
(3) air supporting cleans：Treated that waste water carries out air supporting removal of impurities with air supporting exclusion device for step 2, and continuing will be following in water
And the colloidal solid of precipitation further removes, wherein during the electric flocculation reacts precipitation process, incomplete flocculation sediment
Silica and calcium, magnesium addition colloidal solid can further be precipitated in air-floating apparatus bottom；
(4) membrane filtration：By step 3, treated that waste water is filtered with film filter, and realization flocculates to silica in water
The depth-type filtration of body impurity is handled.
2. silica minimizing technology in a kind of water according to claim 1, which is characterized in that described plus oxygenation pretreatment step
In rapid, available alkaline matter is one or more in sodium hydroxide, calcium hydroxide.
3. silica minimizing technology in a kind of water according to claim 1, which is characterized in that described plus oxygenation pretreatment step
In rapid, the pH=9-14, preferably pH=10-12 of control plus alkali rear solution.
4. silica minimizing technology in a kind of water according to claim 1, which is characterized in that under stirring, into
Row plus oxygenation pretreatment.
5. silica minimizing technology in a kind of water according to claim 1, which is characterized in that react and precipitate in electric flocculation
In step, the Faradaic current is the direct current of 20-40A, 50-60V.
6. silica minimizing technology in a kind of water according to claim 1, which is characterized in that clean and walk in the air supporting
In rapid, control aeration flow velocity is the ﹕ 1 of gas-water ratio=10.
7. silica minimizing technology in a kind of water according to claim 1, which is characterized in that in the membrane filtration step
In, control aqueous solution passes through film filter with 5-10m/h flow velocitys.
8. silica minimizing technology in a kind of water according to claim 1, which is characterized in that reacted through the electric flocculation
The silica isolated and calcium, magnesium addition precipitation are precipitated, can be discharged into sludge concentration tank and be handled by blow-off pipe.
9. silica minimizing technology in a kind of water according to claim 1 or claim 7, which is characterized in that removed in the air supporting
In miscellaneous step, continues the silica that flocculation sediment generates and calcium, magnesium addition precipitation in air-floating apparatus bottom, blow-off pipe can be passed through
It is discharged into sludge concentration tank and is handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193761.1A CN108439669A (en) | 2018-03-09 | 2018-03-09 | Silica minimizing technology in a kind of water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810193761.1A CN108439669A (en) | 2018-03-09 | 2018-03-09 | Silica minimizing technology in a kind of water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108439669A true CN108439669A (en) | 2018-08-24 |
Family
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| CN201810193761.1A Pending CN108439669A (en) | 2018-03-09 | 2018-03-09 | Silica minimizing technology in a kind of water |
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| CN109052481A (en) * | 2018-09-07 | 2018-12-21 | 贵州大学 | The method that absorption method removes magnesium ion in manganese sulfate solution |
| CN109809599A (en) * | 2019-03-15 | 2019-05-28 | 克拉玛依曜诚石油科技有限公司 | The high silicon effluent treating and reusing process of high temperature and high salt and system |
| CN111547917A (en) * | 2020-04-08 | 2020-08-18 | 东华大学 | Method for treating waste water recovered from spent catalyst noble metal |
| CN111635066A (en) * | 2020-04-30 | 2020-09-08 | 安徽进化硅纳米材料科技有限公司 | Method and device for recovering soluble silicon in silicon-containing wastewater |
| CN111635060A (en) * | 2020-04-30 | 2020-09-08 | 安徽进化硅纳米材料科技有限公司 | Method and device for treating silicon dioxide production wastewater |
| CN111807596A (en) * | 2020-08-27 | 2020-10-23 | 潍坊美好生活环保科技有限公司 | Process method for treating precipitated white carbon black wastewater |
| CN111908675A (en) * | 2020-09-03 | 2020-11-10 | 上海力脉环保设备有限公司 | A zero-discharge process and system for producing high-silicon wastewater from white carbon black |
| CN112158983A (en) * | 2020-09-16 | 2021-01-01 | 天津市市政工程设计研究院 | Efficient silicon and fluorine removal system and method for photovoltaic wastewater |
| CN112687972A (en) * | 2020-12-25 | 2021-04-20 | 广东莞绿环保工程有限公司 | System and method for treating and recovering cobalt in lithium battery waste liquid |
| CN112694099A (en) * | 2019-10-21 | 2021-04-23 | 中国石油化工股份有限公司 | ZSM-5 molecular sieve and synthetic method thereof |
| CN115159745A (en) * | 2022-07-29 | 2022-10-11 | 北京耐特尔环境工程技术有限公司 | Method for treating dewatering water containing paste filling exudates |
| CN115477423A (en) * | 2022-10-28 | 2022-12-16 | 富通集团有限公司 | A method for treating wastewater from optical fiber preform production |
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|---|---|---|---|---|
| CN109052481A (en) * | 2018-09-07 | 2018-12-21 | 贵州大学 | The method that absorption method removes magnesium ion in manganese sulfate solution |
| CN109809599A (en) * | 2019-03-15 | 2019-05-28 | 克拉玛依曜诚石油科技有限公司 | The high silicon effluent treating and reusing process of high temperature and high salt and system |
| CN112694099A (en) * | 2019-10-21 | 2021-04-23 | 中国石油化工股份有限公司 | ZSM-5 molecular sieve and synthetic method thereof |
| CN111547917A (en) * | 2020-04-08 | 2020-08-18 | 东华大学 | Method for treating waste water recovered from spent catalyst noble metal |
| CN111635066A (en) * | 2020-04-30 | 2020-09-08 | 安徽进化硅纳米材料科技有限公司 | Method and device for recovering soluble silicon in silicon-containing wastewater |
| CN111635060A (en) * | 2020-04-30 | 2020-09-08 | 安徽进化硅纳米材料科技有限公司 | Method and device for treating silicon dioxide production wastewater |
| CN111635060B (en) * | 2020-04-30 | 2022-06-10 | 安徽进化硅纳米材料科技有限公司 | Method and device for treating silicon dioxide production wastewater |
| CN111635066B (en) * | 2020-04-30 | 2022-06-14 | 安徽进化硅纳米材料科技有限公司 | Method and device for recovering soluble silicon in silicon-containing wastewater |
| CN111807596A (en) * | 2020-08-27 | 2020-10-23 | 潍坊美好生活环保科技有限公司 | Process method for treating precipitated white carbon black wastewater |
| CN111908675A (en) * | 2020-09-03 | 2020-11-10 | 上海力脉环保设备有限公司 | A zero-discharge process and system for producing high-silicon wastewater from white carbon black |
| CN112158983A (en) * | 2020-09-16 | 2021-01-01 | 天津市市政工程设计研究院 | Efficient silicon and fluorine removal system and method for photovoltaic wastewater |
| CN112687972A (en) * | 2020-12-25 | 2021-04-20 | 广东莞绿环保工程有限公司 | System and method for treating and recovering cobalt in lithium battery waste liquid |
| CN115159745A (en) * | 2022-07-29 | 2022-10-11 | 北京耐特尔环境工程技术有限公司 | Method for treating dewatering water containing paste filling exudates |
| CN115477423A (en) * | 2022-10-28 | 2022-12-16 | 富通集团有限公司 | A method for treating wastewater from optical fiber preform production |
| CN118812085A (en) * | 2024-08-09 | 2024-10-22 | 四川贝特格林环保科技有限公司 | A concrete mixing station wastewater purification treatment system and method |
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