CN108840409A - A kind of preparation method and device of iron aluminium compound coagulant - Google Patents
A kind of preparation method and device of iron aluminium compound coagulant Download PDFInfo
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- CN108840409A CN108840409A CN201810674756.2A CN201810674756A CN108840409A CN 108840409 A CN108840409 A CN 108840409A CN 201810674756 A CN201810674756 A CN 201810674756A CN 108840409 A CN108840409 A CN 108840409A
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- ferrous sulfate
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- coagulant
- aluminium compound
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 239000000701 coagulant Substances 0.000 title claims abstract description 80
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 55
- -1 iron aluminium compound Chemical class 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 41
- 239000011790 ferrous sulphate Substances 0.000 claims abstract description 73
- 235000003891 ferrous sulphate Nutrition 0.000 claims abstract description 73
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 73
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 33
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims abstract description 17
- 230000003647 oxidation Effects 0.000 claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 239000008236 heating water Substances 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 17
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 239000004411 aluminium Substances 0.000 claims description 15
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 12
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 11
- 239000000047 product Substances 0.000 description 10
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 9
- 229910000329 aluminium sulfate Inorganic materials 0.000 description 8
- 238000005345 coagulation Methods 0.000 description 7
- 230000015271 coagulation Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 159000000013 aluminium salts Chemical class 0.000 description 6
- 239000003651 drinking water Substances 0.000 description 6
- 235000020188 drinking water Nutrition 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 235000011149 sulphuric acid Nutrition 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 150000002505 iron Chemical class 0.000 description 3
- 239000012263 liquid product Substances 0.000 description 3
- 235000011128 aluminium sulphate Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 208000024827 Alzheimer disease Diseases 0.000 description 1
- 229910018512 Al—OH Inorganic materials 0.000 description 1
- 208000037157 Azotemia Diseases 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 206010028400 Mutagenic effect Diseases 0.000 description 1
- 208000001647 Renal Insufficiency Diseases 0.000 description 1
- 206010039966 Senile dementia Diseases 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 235000019606 astringent taste Nutrition 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000002526 effect on cardiovascular system Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002270 exclusion chromatography Methods 0.000 description 1
- 238000005227 gel permeation chromatography Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- 201000006370 kidney failure Diseases 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 231100000243 mutagenic effect Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000008085 renal dysfunction Effects 0.000 description 1
- 238000009287 sand filtration Methods 0.000 description 1
- 108010048734 sclerotin Proteins 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 208000009852 uremia Diseases 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
- C02F1/52—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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses the preparation method and device of a kind of iron aluminium compound coagulant, the method includes：Ferrous sulfate is placed in one and prepared in container by step S1, adds water and stirs into uniform scattered paste shape ferrous sulfate solution；Step S2 measures the concentrated sulfuric acid of corresponding amount according to the ratio of Fe in the concentrated sulfuric acid and the ferrous sulfate, and the ferrous sulfate solution for preparing container is added and is acidified；Step S3, the container for preparing after being acidified carry out water-bath；Step S4, after temperature is stablized, according to NO in nitric acid3 ‑The nitric acid of corresponding amount is measured with the ratio of Fe in ferrous sulfate, and described prepare is added and carries out oxidation processes, and heating water bath some time in container to it；Step S5 is matched according to the proportional quantities of Al and Fe in ferrous sulfate, measure corresponding amount aluminum sulfate coagulant be added it is described prepare in container, react some time；Step S6 cures the product of preparation, obtains the iron aluminium compound coagulant.
Description
Technical field
The present invention relates to water-treatment technology fields, more particularly to one kind for controlling in drinking water in water treatment procedure
The preparation method and device of the iron aluminium compound coagulant of residual Al.
Background technique
According to the composition of coagulant, it can generally be classified as two class of inorganic coagulant and organic coagulants.Currently, at water supply
Manage factory's application is inorganic coagulant mostly.Inorganic coagulant is broadly divided into aluminium salt and molysite two major classes, and each has a system
Arrange mature product.Aluminium salt especially polymeric aluminum obtains in water process as a kind of efficient inorganic polymer flocculant
It is widely applied.The applicable pH value range of molysite is bigger, and dosage is less, effect is good, nothing left aluminium ion, hydrolysis in water
Product dewatering is excellent, but the cost of molysite is higher, storage transport is inconvenient for use, and if adding and improper easily causing processing water
Middle coloration increases and with astringent taste, is restricted the popularization of iron salt coagulant.In conventional water treatment process, coagulation is to remaining aluminium
Influence it is especially prominent, and the selection of coagulant and flocculation aid is extremely important in coagulation process.What the Ministry of Construction promulgated《Urban water supply
Industry technological progress development plan in 2000》It is middle regulation examination water treatment coagulant and flocculation aid performance superiority and inferiority important indicator it
One is exactly the height for being discharged residual Al.Clinical medicine and environmental medicine confirm that aluminium and its compound have certain toxicity.Modern age
Medicine shows that Excess free enthalpy aluminium can cause following disease：1. causing senile dementia, failure of memory；2. sclerotin is made to become thin
Softization；3. renal dysfunction, kidney failure and uremia；4. making blood and cardiovascular generation disease；5. pair body cell and reproduction
Cell has mutagenic effect.
Using the water factory of aluminum salt, there are aluminium content over-standard phenomenons in output water in China at present.Cui Fuyi etc. is to the whole nation
The survey showed that for the drinking water quality of urban：Have in 32.5% urban drinking water in the city of 40, the whole nation investigated
Aluminum concentration is more than 0.2mg/L limit value.Therefore, a kind of iron aluminium compound coagulant for having aluminium salt and molysite feature concurrently is prepared, molysite is used
Coagulant come partially replace aluminum salt with achieve the purpose that reduce water outlet residual Al with regard to meaningful.
Summary of the invention
In order to overcome the deficiencies of the above existing technologies, one of present invention is designed to provide a kind of iron aluminium compound coagulant
Preparation method and device, to realize a kind of iron aluminium compound coagulant for having aluminium salt and molysite feature concurrently for reaching in water process
To the purpose for reducing water outlet residual Al.
In order to achieve the above object, the present invention proposes a kind of preparation method of iron aluminium compound coagulant, including：
Ferrous sulfate is placed in one and prepared in container by step S1, adds water and stirs into uniform scattered paste shape ferrous sulfate solution；
Step S2 measures the concentrated sulfuric acid of corresponding amount according to the ratio of Fe in the concentrated sulfuric acid and the ferrous sulfate, described in addition
The ferrous sulfate solution for preparing container is acidified；
Step S3, the container for preparing after being acidified carry out water-bath；
Step S4, after temperature is stablized, according to NO in nitric acid3 -The nitre of corresponding amount is measured with the ratio of Fe in ferrous sulfate
Acid is added described prepare and carries out oxidation processes, and heating water bath some time in container to it；
Step S5 is matched according to the proportional quantities of Al and Fe in ferrous sulfate, measures the aluminum sulfate coagulant of corresponding amount
Be added it is described prepare in container, react some time；
Step S6 cures the product of preparation, obtains the iron aluminium compound coagulant.
Preferably, in step S1, the mass ratio of the ferrous sulfate and water is 2:1~2:1.2.
Preferably, in step S2, the molar ratio of the concentrated sulfuric acid and Fe in the ferrous sulfate that are taken is 0.3~0.45.
Preferably, in step S3, control water-bath temperature is 80~100 DEG C.
Preferably, in step S4, NO in the nitric acid that is taken3 -Molar ratio with Fe in ferrous sulfate is 0.42~0.48.
Preferably, in step S4, according to NO in nitric acid3 -Phase is taken with the molar ratio of Fe in ferrous sulfate for 0.42~0.48
The nitric acid that should be measured, be added dropwise it is described prepare to its oxidation processes in container, after adding, water-bath adds at a temperature of 80~100 DEG C
Hot 25min~30min, and slowly stir.
Preferably, in step S5, the molar ratio of the Al and the Fe in the ferrous sulfate are 0.1~0.3.
Preferably, it is 0.1~0.3 proportion by the molar ratio of the Fe in Al and ferrous sulfate, measures the aluminum sulfate of corresponding amount
Coagulant is added described prepare and reacts 20min~30min in container.
Preferably, in step S6, the product of preparation is cured 24 hours or more, the iron aluminium for obtaining rufous is compound
Coagulant.
In order to achieve the above objectives, the present invention also provides a kind of preparation facilities of iron aluminium compound coagulant, including：
Ferrous sulfate solution prepares module, prepares in container, adds water and stirs into uniform for ferrous sulfate to be placed in one
Scattered paste shape ferrous sulfate solution；
It is acidified module, the concentrated sulfuric acid of corresponding amount is measured for the ratio according to Fe in the concentrated sulfuric acid and the ferrous sulfate, is added
Enter the ferrous sulfate solution for preparing container to be acidified；
Water-bath module carries out water-bath for the container for preparing after being acidified；
Oxidation processes and heating water bath module are used for after temperature is stablized, according to NO in nitric acid3 -With Fe in ferrous sulfate
Ratio measures the nitric acid of corresponding amount, and described prepare is added and carries out oxidation processes, and heating water bath some time in container to it；
Aluminum sulfate coagulant measures and reaction module, for being matched according to the proportional quantities of aluminium and Fe in ferrous sulfate,
The aluminum sulfate coagulant addition of measurement corresponding amount is described to be prepared in container, and some time is reacted；
It cures module and obtains the iron aluminium compound coagulant for curing the product of preparation.
Compared with prior art, a kind of preparation method of iron aluminium compound coagulant of the present invention and device realize one kind and have concurrently
The iron aluminium compound coagulant of aluminium salt and molysite feature partially replaces aluminum salt in water process with iron salt coagulant
Residual Al in drinking water is controlled, to achieve the purpose that reduce water outlet residual Al.
Detailed description of the invention
Fig. 1 is a kind of step flow chart of the preparation method of iron aluminium compound coagulant of the present invention；
Fig. 2 is a kind of system architecture diagram of the preparation facilities of iron aluminium compound coagulant of the present invention；
Fig. 3 is the infrared spectrogram of the ferric aluminium sulfate coagulant of the specific embodiment of the invention.
Specific embodiment
Below by way of specific specific example and embodiments of the present invention are described with reference to the drawings, those skilled in the art can
Understand further advantage and effect of the invention easily by content disclosed in the present specification.The present invention can also pass through other differences
Specific example implemented or applied, details in this specification can also be based on different perspectives and applications, without departing substantially from
Various modifications and change are carried out under spirit of the invention.
Fig. 1 is a kind of step flow chart of the preparation method of iron aluminium compound coagulant of the present invention.As shown in Figure 1, of the invention
A kind of preparation method of iron aluminium compound coagulant, including：
Ferrous sulfate is placed in one and prepared in container by step S1, adds water and stirs into uniform scattered paste shape ferrous sulfate solution.
In the specific embodiment of the invention, ferrous sulfate is placed in the double-deck reaction kettle by the container for preparing using the double-deck reaction kettle,
While waterside is added to stir into uniform scattered paste shape ferrous sulfate solution, wherein the mass ratio of ferrous sulfate and water is 2:1~2:1.2.
Step S2 measures the concentrated sulfuric acid (H2SO4) according to the ratio of Fe in the concentrated sulfuric acid (H2SO4) and ferrous sulfate, institute is added
It states and prepares the ferrous sulfate solution of container and be acidified.In the specific embodiment of the invention, the concentrated sulfuric acid (H2SO4) and sulphur that are taken
The molar ratio of Fe is 0.3~0.45 in sour ferrous iron.
Step S3, the container for preparing after being acidified carry out water-bath.It, should in the specific embodiment of the invention
The double-deck reaction kettle carries water-bath temperature control, which is carried out water-bath, controls 80~100 DEG C of water-bath temperature.
Step S4, after temperature is stablized, according to nitric acid (HNO3) in NO3 -Nitric acid is measured with the ratio of Fe in ferrous sulfate
(HNO3), described prepare is added and carries out oxidation processes, and heating water bath some time in container to it.It is embodied in the present invention
In example, the nitric acid (HNO that is taken3) in NO3 -Molar ratio with Fe in ferrous sulfate is 0.42~0.48, that is to say, that temperature
After stabilization, according to nitric acid (HNO3) in NO3 -Nitric acid (HNO is taken with the molar ratio of Fe in ferrous sulfate for 0.42~0.483), dropwise
It is added in reaction kettle to its oxidation processes, after adding, heating water bath 25min~30min at a temperature of 80~100 DEG C, and slowly
Stirring.
Step S5 is matched by aluminium (AL) and iron in ferrous sulfate (Fe), and the aluminum sulfate coagulant for measuring corresponding amount adds
Enter it is described prepare in container, react some time.In the specific embodiment of the invention, by mole of the Fe in Al and ferrous sulfate
Than being matched for 0.1~0.3, measures a certain amount of aluminum sulfate coagulant and be added in reaction kettle, react 20min~30min.
Step S6 cures the product of preparation, obtains the iron aluminium compound coagulant.In the specific embodiment of the invention
In, the product of preparation is cured 24 hours or more, obtain the liquid product of rufous, as iron aluminium compound coagulant.
Fig. 2 is a kind of system architecture diagram of the preparation facilities of iron aluminium compound coagulant of the present invention.As shown in Fig. 2, of the invention
A kind of preparation facilities of iron aluminium compound coagulant, including：
Ferrous sulfate solution prepares module 201, prepares in container, adds water and stirs into uniform for ferrous sulfate to be placed in one
Scattered paste shape ferrous sulfate solution.In the specific embodiment of the invention, the container for preparing is using the double-deck reaction kettle, i.e., by sulfuric acid
Ferrous iron is placed in the double-deck reaction kettle, while waterside is added to stir into uniform scattered paste shape ferrous sulfate solution, wherein ferrous sulfate and water
Mass ratio be 2:1~2:1.2.
It is acidified module 202, for measuring the concentrated sulfuric acid according to the ratio of Fe in the concentrated sulfuric acid (H2SO4) and ferrous sulfate
(H2SO4), the ferrous sulfate solution for preparing container is added to be acidified.In the specific embodiment of the invention, what is taken is dense
The molar ratio of Fe is 0.3~0.45 in sulfuric acid (H2SO4) and ferrous sulfate.
Water-bath module 203, for carrying out water-bath to the container for preparing after being acidified.Have in the present invention
In body embodiment, which carries water-bath temperature control, which is carried out water-bath, controls water-bath temperature 80
~100 DEG C.
Oxidation processes and heating water bath module 204 are used for after temperature is stablized, according to nitric acid (HNO3) in NO3 -With sulfuric acid
The ratio of Fe measures nitric acid (HNO in ferrous iron3), described prepare in container is added, oxidation processes are carried out to it, and if heating water bath
The dry time.In the specific embodiment of the invention, the nitric acid (HNO that is taken3) in NO3 -Molar ratio with Fe in ferrous sulfate is 0.42
~0.48, that is to say, that after temperature is stablized, according to nitric acid (HNO3) in NO3 -Molar ratio with Fe in ferrous sulfate is 0.42
~0.48 takes nitric acid (HNO3), it is added dropwise in reaction kettle to its oxidation processes, after adding, water-bath at a temperature of 80~100 DEG C
25min~30min is heated, and is slowly stirred.
Aluminum sulfate coagulant measures and reaction module 205, for being matched by aluminium (AL) and iron in ferrous sulfate (Fe),
The aluminum sulfate coagulant addition of measurement corresponding amount is described to be prepared in container, and some time is reacted.In the specific embodiment of the invention,
It is 0.1~0.3 proportion by the molar ratio of the Fe in Al and ferrous sulfate, measures a certain amount of aluminum sulfate coagulant and reaction kettle is added
In, react 20min~30min.
It cures module 206 and obtains the iron aluminium compound coagulant for curing the product of preparation.In the present invention
In specific embodiment, the product of preparation is cured 24 hours, the liquid product of rufous, as iron aluminium compound coagulant are obtained.
It will illustrate the preparation process of the iron aluminium compound coagulant of the present invention by specific embodiment below：
In each specific embodiment of the present invention, complex coagulation agent prescription is as shown in table 1 below：
Table 1
Only illustrate the preparation process of iron aluminium compound coagulant by taking 1 illustrated embodiment 2 of table as an example below, specific step is as follows：
(1) 4kg FeSO is weighed4(ferrous sulfate) 7H2O (is placed in the double-deck reaction kettle, stirs when distilled water (2L) is added
Mix uniform scattered paste shape ferrous sulfate solution；
(2) according to dense H2SO4The proportional quantities (molar ratio) of/Fe (in ferrous sulfate)=0.45 takes dense H2SO4, take in fact
Then 300mL is added dropwise in reaction kettle and is acidified；
(3) reaction kettle is subjected to water-bath, controls 80 DEG C of water-bath temperature；
(4) after temperature is stablized, according to nitric acid (HNO3) in NO3 -The proportional quantities of/Fe (in ferrous sulfate)=0.45
(molar ratio) takes nitric acid (HNO3), the dense HNO of 480mL is taken in fact3, it is added dropwise in reaction kettle to its oxidation processes.After adding, 80
Heating water bath 25min at a temperature of DEG C, and slowly stir；
(5) it is 0.15 mol ratio by the molar ratio of the Fe in Al and ferrous sulfate, measures a certain amount of aluminum sulfate coagulation
Agent is added in reaction kettle, reaction time 20min；
(6) product of preparation is cured 24 hours, obtains the liquid product of rufous to get iron aluminium compound coagulant is arrived.
It will illustrate residual Al effect in the iron aluminium compound coagulant removal drinking water of the present invention by specific embodiment below
Fruit
In the specific embodiment of the invention, the turbidity of raw water is 12NTU, and coloration is 10 degree, chemical oxygen consumption (COC) 2.4mg/
L see the table below 2 with the sand filtration effluent quality situation of polymeric ferric sulfate compound coagulant processing raw water：
Table 2
The following are the interpretations of result to the performance test of iron aluminium compound coagulant made by the present invention：
1, it is illustrated in figure 3 the infrared spectrogram of the ferric aluminium sulfate coagulant of the present invention, passes through the iron aluminium coagulant by Fig. 3
Known to the absorption peak analysis of sample：
1) absorption peak of 3100~3300cm-1 is the stretching vibration of hydroxyl-OH in Fe-OH, Al-OH and water of coordination H-OH
Superposition, peak intensity and it is wide, show with the presence of a large amount of OH；
2) between 1610~1639cm-1 stronger absorption peak be water of coordination flexural vibrations peak；
3) absorption peak occurred between 1116~1188cm-1 is the stretching vibration of Fe-OH-Fe, Al-OH-Al, belongs to molecule
The metal on surface-OH bending vibration, illustrates the polymer of the existing iron with hydroxyl bridging in sample, and has with hydroxyl bridging
The polymer of aluminium；
4) position 993cm-1 is SO in spectrogram4 2-Stretching vibration absworption peak；
5) absorption peak at 593cm-1 and 486.7cm-1 is similar to polyaluminum ferric chloride absorption peak, illustrates have with -0H bridge
The iron polymer and aluminium polymer of connection.
In conjunction with infared spectrum analysis it is found that hydroxy radical content is higher in polymeric ferric sulfate coagulant, and contains great amount of hydroxy group
Bridging iron polymer Fe-OH-Fe and hydroxyl bridging aluminium polymer Al-O-Al, these all demonstrate polymeric ferric sulfate coagulant
In have the presence of polymeric species.These characteristic groups can be good at during handling raw water play adsorption bridging effect and
Net catches the volume effect of sweeping, and enhances its coagulation performance.
2, coagulant molecular weight is analyzed
According to the chromatogram of gel chromatography, the average molecular weight of each component of coagulant can be calculated, the results are shown in Table 3.
3 coagulant molecule measuring test result of table
Table 3 is that exclusion chromatography measures coagulant molecule measuring test result.As shown in Table 3, self-control polymeric ferric sulfate is mixed
Solidifying agent(number-average molecular weight) and(weight average molecular weight) is above commercially available bodied ferric sulfate.From several equal and Weight-average moleculars
The definition of amount is it is found that low molecular weight part of the number-average molecular weight in polymer, i.e. low molecular weight part pairInfluence compared with
Greatly, high molecular weight moieties of the weight average molecular weight in polymer, i.e. high molecular weight moieties pairIt is affected.Polymer
Coagulation performance is affected by bigger molecule is polymeric, so withTo characterize the degree of polymerization ratio of polymerIt is more appropriate.
The number of self-control polymeric ferric sulfate is equal, weight average molecular weight is better than commercially available bodied ferric sulfate, illustrates to make polymeric ferric sulfate coagulation by oneself
The substance of macromolecule is implicitly present in agent sample, and the degree of polymerization is higher than commercially available bodied ferric sulfate.It is mixed to make polymeric ferric sulfate by oneself
Solidifying agentWith(Distribution Breadth Index) and(polydispersity coefficient) is respectively less than commercially available bodied ferric sulfate, illustrates to make by oneself
Molecule is relatively simple in polymeric ferric sulfate, and molecular weight dispersion compares concentration, is narrow ditribution.
As it can be seen that the preparation method and device of a kind of iron aluminium compound coagulant of the present invention realize one kind and have aluminium salt and molysite concurrently
The iron aluminium compound coagulant of feature partially replaces aluminum salt for controlling drinking water in water process with iron salt coagulant
Middle residual Al, to achieve the purpose that reduce water outlet residual Al.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.Any
Without departing from the spirit and scope of the present invention, modifications and changes are made to the above embodiments by field technical staff.Therefore,
The scope of the present invention, should be as listed in the claims.
Claims (10)
1. a kind of preparation method of iron aluminium compound coagulant, including：
Ferrous sulfate is placed in one and prepared in container by step S1, adds water and stirs into uniform scattered paste shape ferrous sulfate solution；
Step S2 measures the concentrated sulfuric acid of corresponding amount according to the ratio of Fe in the concentrated sulfuric acid and the ferrous sulfate, the preparation is added
The ferrous sulfate solution of container is acidified；
Step S3, the container for preparing after being acidified carry out water-bath；
Step S4, after temperature is stablized, according to NO in nitric acid3 -The nitric acid that corresponding amount is measured with the ratio of Fe in ferrous sulfate, adds
Enter described prepare and carries out oxidation processes, and heating water bath some time in container to it；
Step S5 is matched according to the proportional quantities of Al and Fe in ferrous sulfate, and the aluminum sulfate coagulant for measuring corresponding amount is added
It is described to prepare in container, react some time；
Step S6 cures the product of preparation, obtains the iron aluminium compound coagulant.
2. a kind of preparation method of iron aluminium compound coagulant as described in claim 1, it is characterised in that：In step S1, institute
The mass ratio for stating ferrous sulfate and water is 2:1~2:1.2.
3. a kind of preparation method of iron aluminium compound coagulant as described in claim 1, it is characterised in that：In step S2, institute
The molar ratio of Fe is 0.3~0.45 in the concentrated sulfuric acid and the ferrous sulfate taken.
4. a kind of preparation method of iron aluminium compound coagulant as described in claim 1, it is characterised in that：In step S3, control
Water-bath temperature processed is 80~100 DEG C.
5. a kind of preparation method of iron aluminium compound coagulant as described in claim 1, it is characterised in that：In step S4, institute
NO in the nitric acid taken3 -Molar ratio with Fe in ferrous sulfate is 0.42~0.48.
6. a kind of preparation method of iron aluminium compound coagulant as claimed in claim 5, it is characterised in that：In step S4, root
According to NO in nitric acid3 -Molar ratio with Fe in ferrous sulfate is 0.42~0.48 nitric acid for taking corresponding amount, and the preparation is added dropwise
To its oxidation processes in container, after adding, heating water bath 25min~30min at a temperature of 80~100 DEG C, and slowly stir.
7. a kind of preparation method of iron aluminium compound coagulant as described in claim 1, it is characterised in that：In step S5, institute
The molar ratio for stating the Fe in Al and the ferrous sulfate is 0.1~0.3.
8. a kind of preparation method of iron aluminium compound coagulant as claimed in claim 7, it is characterised in that：By Al and ferrous sulfate
In Fe molar ratio be 0.1~0.3 proportion, measure corresponding amount aluminum sulfate coagulant be added described prepare in container react
20min~30min.
9. a kind of preparation method of iron aluminium compound coagulant as described in claim 1, it is characterised in that：It, will in step S6
Product curing 24 hours or more of preparation, obtain the iron aluminium compound coagulant of rufous.
10. a kind of preparation facilities of iron aluminium compound coagulant, including：
Ferrous sulfate solution prepares module, prepares in container for ferrous sulfate to be placed in one, adds water and stirs into uniform magma
Shape ferrous sulfate solution；
It is acidified module, the concentrated sulfuric acid of corresponding amount is measured for the ratio according to Fe in the concentrated sulfuric acid and the ferrous sulfate, institute is added
It states and prepares the ferrous sulfate solution of container and be acidified；
Water-bath module carries out water-bath for the container for preparing after being acidified；
Oxidation processes and heating water bath module are used for after temperature is stablized, according to NO in nitric acid3 -With the ratio of Fe in ferrous sulfate
The nitric acid of corresponding amount is measured, described prepare is added and carries out oxidation processes, and heating water bath some time in container to it；
Aluminum sulfate coagulant measures and reaction module, for being matched according to the proportional quantities of aluminium and Fe in ferrous sulfate, measures
The aluminum sulfate coagulant addition of corresponding amount is described to be prepared in container, and some time is reacted；
It cures module and obtains the iron aluminium compound coagulant for curing the product of preparation.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3986975A (en) * | 1972-08-31 | 1976-10-19 | Gebr. Giulini Gmbh | Process for continuous production of flocculating agent from red mud |
| CN102120623A (en) * | 2011-01-28 | 2011-07-13 | 重庆大学 | Preparation method of polysilicate aluminium ferric flocculant |
| CN102515330A (en) * | 2012-01-13 | 2012-06-27 | 重庆大学 | Preparation method of polymeric aluminum ferric sulfate flocculating agent (liquid) |
-
2018
- 2018-06-27 CN CN201810674756.2A patent/CN108840409A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3986975A (en) * | 1972-08-31 | 1976-10-19 | Gebr. Giulini Gmbh | Process for continuous production of flocculating agent from red mud |
| CN102120623A (en) * | 2011-01-28 | 2011-07-13 | 重庆大学 | Preparation method of polysilicate aluminium ferric flocculant |
| CN102515330A (en) * | 2012-01-13 | 2012-06-27 | 重庆大学 | Preparation method of polymeric aluminum ferric sulfate flocculating agent (liquid) |
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Application publication date: 20181120 |