CN115180797A - Polyaluminum ferric silicate medicament for sewage treatment and preparation method and application thereof - Google Patents
Polyaluminum ferric silicate medicament for sewage treatment and preparation method and application thereof Download PDFInfo
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- CN115180797A CN115180797A CN202210832417.9A CN202210832417A CN115180797A CN 115180797 A CN115180797 A CN 115180797A CN 202210832417 A CN202210832417 A CN 202210832417A CN 115180797 A CN115180797 A CN 115180797A
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- 239000003814 drug Substances 0.000 title claims abstract description 38
- 239000010865 sewage Substances 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 title claims description 32
- 239000010802 sludge Substances 0.000 claims abstract description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 27
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 22
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000007800 oxidant agent Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000001590 oxidative effect Effects 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 44
- 239000000203 mixture Substances 0.000 claims description 23
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical group OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 22
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 20
- 239000011790 ferrous sulphate Substances 0.000 claims description 20
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 13
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 claims description 12
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- 208000005156 Dehydration Diseases 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 9
- 238000006297 dehydration reaction Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- 239000006227 byproduct Substances 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 3
- 229920000570 polyether Polymers 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 9
- 229920000642 polymer Polymers 0.000 abstract description 7
- 239000002994 raw material Substances 0.000 abstract description 7
- 238000001179 sorption measurement Methods 0.000 abstract description 7
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 6
- 230000002209 hydrophobic effect Effects 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 abstract description 4
- 238000006116 polymerization reaction Methods 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- -1 iron complex ions Chemical class 0.000 abstract description 2
- 238000006386 neutralization reaction Methods 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 7
- 238000005496 tempering Methods 0.000 description 7
- 230000002159 abnormal effect Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 239000000701 coagulant Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 210000002421 cell wall Anatomy 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 244000005700 microbiome Species 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 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
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013583 drug formulation Substances 0.000 description 1
- 229910001447 ferric ion Inorganic materials 0.000 description 1
- 229910001448 ferrous ion Inorganic materials 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method 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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a polysilicate aluminum ferric medicament for sewage treatment and a preparation method and application thereof, wherein the polysilicate aluminum ferric medicament comprises the following components in parts by weight: 20 to 30 parts of ferrous salt, 10 to 20 parts of sulfuric acid, 5 to 10 parts of alumina, 0.6 to 1.2 parts of silica, 1 to 5 parts of oxidant and 30 to 35 parts of water. The components are adopted in a certain proportion, and a polymerization reaction is carried out at a specific temperature to form a low-molecular polymer; the specific surface area of the polymer can be greatly enhanced in the synthesis process due to the special molecular structure of the silicon dioxide, so that the adsorption capacity of the silicon dioxide is stronger, and meanwhile, a special pore channel can be formed due to the silicon-oxygen bond effect, so that the hydrophobic capacity of the silicon dioxide is enhanced; the aluminum oxide is used as a raw material, so that the electric adsorption neutralization capacity of iron complex ions can be enhanced, and the acidity of the polyferric oxide is weakened by adding a small amount of aluminum oxide due to the strong acidity of the iron medicament, and chloride ions cannot be introduced into sludge and cannot easily corrode a pipeline.
Description
Technical Field
The invention relates to the technical field of sewage treatment reagents, in particular to a polyaluminum ferric silicate medicament for sewage treatment and a preparation method and application thereof.
Background
In recent years, the increase of sewage treatment capacity causes a large amount of excess sludge to be generated in the water treatment process, so that the attention to sludge treatment and resource utilization is increasing. Sludge, which is a product of a sewage treatment process, has very complicated composition components, and contains a large amount of moisture, resulting in very large volume of sludge, causing great difficulty in subsequent treatment processes and transportation and greatly increasing treatment costs, and therefore, it is necessary to dehydrate sludge to reduce the volume of sludge.
The sludge is generally difficult to separate solid from liquid by conventional sedimentation and simple mechanical dehydration because the water in the sludge is mostly in the form of interstitial water and internally bound water or attached water, except a small amount of free water, and is wrapped with solids. Therefore, before the sludge is subjected to filter pressing treatment, a treatment agent needs to be added into the sludge for quenching and tempering treatment so as to ensure effective separation of solid and liquid in the subsequent filter pressing treatment.
At present, inorganic, organic or mixed flocculants are commonly used as sludge treatment agents. Inorganic flocculant such as iron salt, aluminum salt, calcium ion, etc. can reduce repulsion between particles by electrically neutralizing, compressing double electric layers and reducing repulsive potential, thereby achieving the purpose of coagulation; organic flocculants such as polyacrylamides mainly enable particles to be gathered together through the adsorption and bridging action of high molecular compounds to form larger flocs for sedimentation; the mixed flocculant is a mixture of an inorganic flocculant and an organic flocculant in a certain proportion and in a certain adding sequence, so that the effect of efficiently dehydrating the sludge is achieved.
At present, the common coagulants such as ferric trichloride, polyferric oxide and aluminum chloride have unstable dehydration treatment effect, the water content of the sludge after dehydration treatment is high, deep dehydration of the sludge cannot be promoted, and the product contains chloride ions, so that extra chloride ions are introduced into the sludge, and further serious pipeline corrosion is caused.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a poly aluminum ferric silicate medicament for sewage treatment, and a preparation method and application thereof. In addition, the invention also provides a preparation method and application of the polysilicate aluminum ferric medicament for sewage treatment.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a polysilicate aluminum ferric medicament for sewage treatment, which comprises the following components in parts by weight:
20-30 parts of ferrous salt, 10-20 parts of sulfuric acid (the mass content is 90-95%), 5-10 parts of alumina, 0.6-1.2 parts of silicon dioxide, 1-5 parts of oxidant and 30-35 parts of water.
Adopt above-mentioned technical scheme:
the applicant of the present application, through a great deal of experimental research, finds that ferrous sulfate is used as a raw material, and the ferrous sulfate and the raw materials such as alumina, silica, oxidant and the like are subjected to a polymerization reaction at a certain ratio at a specific temperature to form a low molecular polymer. When the product is used, the product is added into sludge, the charges of the product can adsorb the abnormal charges in the sludge to enable the abnormal charges to be adsorbed, meanwhile, metal ions can destroy the cell wall structure of microorganisms to release free water in cells, finally, a large hydrophobic water filtering channel can be formed in a bridging and crosslinking mode under the cooperation of silicon dioxide, pressure of a certain degree can be borne, and bound water and free water in the sludge can be rapidly extruded out under certain pressure by utilizing the hydrophobic water filtering channel and the water filtering channel.
Specifically, the ferrous salt is ferrous sulfate.
Ferrous sulfate is selected as the ferrous salt, so that chloride ions are not introduced into the sludge, and the pipeline is not easily corroded.
Specifically, the ferrous sulfate is a byproduct in titanium dioxide production.
Ferrous sulfate is a byproduct in the production process of a titanium dioxide factory, and the quantity of the ferrous sulfate is large, so that many titanium dioxide factories are very troublesome in the aspect of treating the ferrous sulfate byproduct. In the application, the by-product ferrous sulfate produced by titanium dioxide is directly used as a raw material, so that waste is changed into valuable, and the environmental protection ecological requirement vigorously advocated by the nation is met.
Specifically, the oxidant is hydrogen peroxide (20-25% by mass).
In the prior art, sodium persulfate, sodium nitrite and the like are generally selected as oxidizing agents when the poly-aluminum ferric silicate medicament is prepared, and hydrogen peroxide is selected as the oxidizing agent, so that the poly-aluminum ferric silicate medicament has the advantages of no toxicity, no harm to the environment, no generation of byproducts and the like, and can effectively oxidize ferrous ions into ferric ions.
In a second aspect of the present invention, there is provided a method for preparing the above polymeric aluminum ferric silicate reagent for sewage treatment, comprising the steps of:
s1, sequentially adding a ferrous salt, sulfuric acid, alumina and silicon dioxide into a reaction vessel, adding water into the reaction vessel, and stirring and mixing the mixture uniformly;
s2, heating the mixed solution in the reaction container in the step S1 to 80-110 ℃, adding an oxidant into the mixed solution, stirring and mixing the mixture uniformly, and reacting the mixture;
and S3, after the mixture in the reaction container in the step S2 is completely reacted, reducing the temperature, and discharging to obtain the polyaluminum ferric silicate medicament.
Specifically, in the step S2, after the oxidant is added, the reaction time is 2-3h.
Specifically, in step S3, the judgment criterion for the completion of the reaction of the mixed solution in the reaction vessel is as follows: the ferric iron content of the mixture in the reaction vessel is greater than 150g/L and the ferrous iron content is less than 1g/L.
Specifically, in the step S3, after the mixture in the reaction vessel is completely reacted, the temperature is reduced to 20 to 25 ℃, and then the material is discharged.
In a third aspect of the invention, the application of the polyaluminum ferric silicate for sewage treatment is provided, and the polyaluminum ferric silicate is used for sludge dehydration treatment.
Specifically, the polysilicate aluminum ferric agent and the polyether amine are used in a matched mode and are sequentially added in the sludge tempering process.
Before filter pressing treatment, sludge is firstly sent into a tempering tank through a pipeline pump for tempering treatment, the polysilicate aluminum ferric medicament is stored in a barrel, when the sludge is used, the sludge is quantitatively conveyed into the tempering tank through a pipeline and a medicament feeding pump, and stirring and mixing are carried out for about 1 hour; and then adding polyetheramine into the quenching and tempering tank, stirring for 5min after the polyetheramine is added, and feeding the plate frame sludge at any time for subsequent filter pressing treatment.
Compared with the prior art, the invention has the following beneficial effects:
(1) In the invention, ferrous sulfate is used as a raw material, alumina, silica and an oxidant are used as auxiliary raw materials, and the components are subjected to polymerization reaction at a specific temperature according to a certain proportion to form a low-molecular polymer; the specific surface area of the polymer can be greatly enhanced in the synthesis process due to the special molecular structure of the silicon dioxide, so that the adsorption capacity of the polymer is stronger, and meanwhile, a special pore channel can be formed due to the action of a silicon-oxygen bond, so that the hydrophobic capacity of the polymer is enhanced; alumina is used as a raw material, so that the electric adsorption neutralization capacity of iron complex ions can be enhanced, and the acidity of polyferric can be weakened by adding a small amount of alumina due to strong acidity of iron medicaments, chloride ions cannot enter sludge, and a pipeline is not easy to corrode;
(2) After the medicament product is added into sludge, the charges can adsorb the abnormal charges in the sludge to enable the abnormal charges to be adsorbed, meanwhile, metal ions can destroy the cell wall structure of microorganisms to release free water in cells, finally, a large hydrophobic water filtering channel can be formed in a bridging and crosslinking mode under the coordination of silicon dioxide, and can bear pressure to a certain degree;
(3) Under the premise that the environment-friendly ecology is vigorously advocated in China and the environmental protection index is increasingly strict, the poly-aluminum ferric silicate medicament serving as the improvement and supplement of the traditional dehydration medicament can achieve satisfactory effects in most sludge treatment industries.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The aluminum ferric polysilicate medicament for sewage treatment comprises the following components:
23 parts of ferrous sulfate, 14 parts of sulfuric acid (the mass content is 90%), 5 parts of alumina, 1 part of silicon dioxide, 1 part of hydrogen peroxide (the mass content is 25%), and 30 parts of water.
The preparation method of the polysilicate aluminum ferric medicament comprises the following steps:
s1, sequentially adding ferrous sulfate, sulfuric acid, aluminum oxide and silicon dioxide into a reaction container, adding water into the reaction container, and stirring and mixing the materials uniformly;
s2, heating the mixed solution in the reaction container in the step S1 to 80 ℃, adding hydrogen peroxide, stirring and mixing uniformly, reacting for 2 hours, taking out a small amount of reactants in the reaction process, measuring the content of ferric iron and ferrous iron, and stopping the reaction until the content of ferric iron in the mixture in the reaction container is more than 150g/L and the content of ferrous iron is less than 1 g/L;
and S3, reducing the temperature of the mixture in the reaction container in the step S2 to 20 ℃, discharging, and subpackaging to obtain the polyaluminum ferric silicate medicament.
Example 2
The aluminum ferric polysilicate medicament for sewage treatment comprises the following components:
25 parts of ferrous sulfate, 15 parts of sulfuric acid (the mass content is 90%), 10 parts of alumina, 1 part of silicon dioxide, 2 parts of hydrogen peroxide (the mass content is 25%) and 30 parts of water.
The preparation method of the polysilicate aluminum ferric medicament comprises the following steps:
s1, sequentially adding ferrous sulfate, sulfuric acid, aluminum oxide and silicon dioxide into a reaction container, adding water into the reaction container, and stirring and mixing the materials uniformly;
s2, heating the mixed solution in the reaction container in the step S1 to 90 ℃, adding hydrogen peroxide, stirring and mixing uniformly, reacting for 3 hours, taking out a small amount of reactants in the reaction process, measuring the content of ferric iron and ferrous iron, and stopping the reaction until the content of ferric iron in the mixture in the reaction container is more than 150g/L and the content of ferrous iron is less than 1 g/L;
and S3, reducing the temperature of the mixture in the reaction container in the step S2 to 25 ℃, discharging, and subpackaging to obtain the polyaluminum ferric silicate medicament.
Example 3
The aluminum ferric polysilicate medicament for sewage treatment comprises the following components:
20 parts of ferrous sulfate, 10 parts of sulfuric acid (with the mass content of 90%), 8 parts of alumina, 0.6 part of silicon dioxide, 3 parts of hydrogen peroxide (with the mass content of 25%) and 32 parts of water.
The preparation method of the polysilicate aluminum ferric medicament comprises the following steps:
s1, sequentially adding ferrous sulfate, sulfuric acid, alumina and silicon dioxide into a reaction container, adding water into the reaction container, and stirring and mixing the materials uniformly;
s2, heating the mixed solution in the reaction container in the step S1 to 110 ℃, adding hydrogen peroxide, stirring and mixing uniformly, reacting for 2 hours, taking out a small amount of reactants in the reaction process, measuring the content of ferric iron and ferrous iron, and stopping the reaction until the content of ferric iron in the mixture in the reaction container is more than 150g/L and the content of ferrous iron is less than 1 g/L;
and S3, reducing the temperature of the mixture in the reaction container in the step S2 to 20 ℃, discharging, and subpackaging to obtain the polyaluminum ferric silicate medicament.
Example 4
The aluminum ferric polysilicate medicament for sewage treatment comprises the following components:
30 parts of ferrous sulfate, 20 parts of sulfuric acid (with the mass content of 90%), 6 parts of alumina, 1.2 parts of silicon dioxide, 5 parts of hydrogen peroxide (with the mass content of 25%) and 35 parts of water.
The preparation method of the polysilicate aluminum ferric medicament comprises the following steps:
s1, sequentially adding ferrous sulfate, sulfuric acid, alumina and silicon dioxide into a reaction container, adding water into the reaction container, and stirring and mixing the materials uniformly;
s2, heating the mixed solution in the reaction container in the step S1 to 100 ℃, adding hydrogen peroxide, stirring and mixing uniformly, reacting for 3 hours, taking out a small amount of reactants in the reaction process, measuring the content of ferric iron and ferrous iron, and stopping the reaction until the content of ferric iron in the mixture in the reaction container is more than 150g/L and the content of ferrous iron is less than 1 g/L;
and S3, reducing the temperature of the mixture in the reaction container in the step S2 to 20 ℃, discharging, and subpackaging to obtain the polyaluminum ferric silicate medicament.
Examples of the experiments
The sludge was dewatered using the polyaluminum ferric silicate reagent prepared in example 1:
1. drug formulation and dosing
The polysilicate aluminum ferrite is stored in a ton barrel which is temporarily stacked on site, and when the silicon aluminum ferrite is used, a certain amount of the silicon aluminum ferrite is pumped into a conditioning tank by a pipeline and a dosing pump.
2. Mode of operation
2.1 sludge Conditioning
Stirring and opening a conditioning pool, quantitatively pumping the poly aluminum ferric silicate medicament into the conditioning pool, and stirring for 1 hour;
and then adding polyetheramine into the hardening and tempering tank, and stirring for 5min after the polyetheramine is added, so that plate frame sludge feeding can be started at any time.
2.2 plate frame operation mode
(1) Feeding the materials by a low-pressure pump at a constant frequency, wherein the frequency is 50Hz, and the internal pressure of the plate frame is gradually increased from 0bar to 7.5bar;
(2) Feeding by a low-pressure pump at constant pressure and variable frequency, wherein the constant pressure is set to be 7.5bar, the operation time is 3600s, the frequency of the low-pressure pump is gradually attenuated from 50Hz, and the low-pressure constant pressure is finished after the operation of 3600 s;
(3) Feeding by a high-pressure pump at constant frequency, wherein the constant frequency is 50Hz, and the internal pressure of the plate frame is gradually increased from 7.5bar to 10bar;
(4) The high-pressure pump is fed in a constant-pressure variable-frequency mode, the constant pressure is set to be 10bar, the operation lasts 3200s, the high-pressure pump frequency is gradually attenuated from the highest, the high-pressure pump automatically stops operating after 3200s, and the squeezing pump automatically starts operating;
(5) The high-pressure squeezing pump performs constant-frequency squeezing, the constant frequency is 50Hz, and the internal pressure of the plate frame is gradually increased from 0bar to 12bar;
(6) Squeezing at constant pressure of 12bar by a high-pressure squeezing pump, and automatically stopping the high-pressure squeezing pump when the set squeezing time is 3600s, wherein squeezed water flows back to a squeezing water tank;
(7) And opening a plate frame pull plate to discharge.
2.3 test sampling
Taking the sludge from a sludge conditioning pool;
the dewatered sludge is taken from the sludge cake after the plate opening of the plate-and-frame filter press.
2.4 determination of Water content
And (3) carrying out on-site measurement on the sludge feeding water content and the dewatered sludge cake water content by adopting an imported MF50 automatic water content measuring instrument.
3. Procedure of experiment
3.1 test time:
2021 year, 10 months 3 days-10 months 25 days.
3.2 adjusting the technological parameters of the test:
when the poly aluminum ferric silicate medicament is used, the addition of the prior process is referred, and then the dosage is adjusted according to the dehydration effect.
4. Comparative experiment
The existing coagulant PAC and FeCl is adopted 3 And (4) poly-iron, and dewatering the sludge according to the test method.
5. The test data are shown in table 1 and table 2.
Table 1 test data for existing coagulants
TABLE 2 Experimental data for iron aluminum polysilicate formulation in example 1
As can be seen from the comparison of the experimental data in tables 1 and 2, the conventional coagulants PAC and FeCl were used 3 The water permeation effect is poor because the polymerization adsorption effect of the polyether amine is influenced by excessive chloride ions; in the poly-iron, the water released by destroying cells is insufficient due to ferric iron, and no effective bridging ionic silicon exists, so that the water content of the sludge cake is higher. The polyaluminium silicate iron powder in the applicationThe agent can adsorb the abnormal charges in the sludge due to the charged charges, so that the abnormal charges are adsorbed, meanwhile, metal ions can destroy the cell wall structure of microorganisms, free water in cells is released, finally, a large hydrophobic water filtering channel is formed in a bridging and crosslinking mode under the coordination of silicon dioxide, and the pressure in a certain degree can be borne. Under the premise that the environment-friendly ecology is vigorously advocated in China and the environmental protection indexes are increasingly strict, the aluminum ferric polysilicate medicament in the application is used as the improvement and supplement of the traditional dehydration medicament, and can achieve satisfactory effects in most sludge treatment industries.
Compared with the existing products of the same type, the poly aluminum ferric silicate medicament for sewage treatment has the advantages of better wall breaking effect, larger pores and better adsorption effect, and can ensure that sludge is dewatered more thoroughly in the aspect of sludge dewatering treatment.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (10)
1. The aluminum ferric polysilicate medicament for sewage treatment is characterized by comprising the following components in parts by weight:
20 to 30 parts of ferrous salt, 10 to 20 parts of sulfuric acid, 5 to 10 parts of alumina, 0.6 to 1.2 parts of silica, 1 to 5 parts of oxidant and 30 to 35 parts of water.
2. The polyaluminum ferric silicate for sewage treatment according to claim 1, wherein the ferrous salt is ferrous sulfate.
3. The poly aluminum ferric silicate medicament for sewage treatment as claimed in claim 2, wherein the ferrous sulfate is a byproduct of titanium dioxide production.
4. The agent of polyaluminum ferric silicate for sewage treatment as claimed in claim 1, wherein the oxidizing agent is hydrogen peroxide.
5. The preparation method of the polysilicate aluminum ferric agent for sewage treatment according to claim 1, characterized by comprising the following steps:
s1, sequentially adding a ferrous salt, sulfuric acid, alumina and silicon dioxide into a reaction vessel, adding water into the reaction vessel, and stirring and mixing the mixture uniformly;
s2, heating the mixed solution in the reaction container in the step S1 to 80-110 ℃, adding an oxidant into the mixed solution, stirring and mixing the mixture uniformly, and reacting the mixture;
and S3, after the mixture in the reaction container in the step S2 is completely reacted, reducing the temperature, and discharging to obtain the polyaluminum ferric silicate medicament.
6. The method for preparing an agent of polyaluminum ferric silicate for sewage treatment as claimed in claim 5, wherein the reaction time after adding the oxidant in step S2 is 2-3h.
7. The method for producing an agent of polyaluminum ferric silicate for sewage treatment as claimed in claim 6, wherein the criterion for completion of the reaction of the mixed solution in the reaction vessel in the step S3 is: the content of ferric iron in the mixture in the reaction vessel is more than 150g/L, and the content of ferrous iron is less than 1g/L.
8. The method for preparing an agent of polyaluminum ferric silicate for sewage treatment as claimed in claim 5, wherein in step S3, after the mixture in the reaction vessel is completely reacted, the temperature is reduced to 20-25 ℃, and then discharging is performed.
9. Use of the polyaluminum ferric silicate for sewage treatment according to claim 1, wherein the polyaluminum ferric silicate is used for sludge dehydration treatment.
10. The application of the polyaluminum ferric silicate for sewage treatment according to claim 9, wherein the polyaluminum ferric silicate is used in combination with polyether amine, and the polyaluminum ferric silicate is sequentially added in a sludge conditioning process.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557208A (en) * | 2011-03-10 | 2012-07-11 | 中国环境科学研究院 | Method for preparing poly aluminum ferric silicate composite flocculating agent by using red mud and ferrous sulfate |
| CN102826560A (en) * | 2012-08-29 | 2012-12-19 | 潘国雄 | Red mud resource utilization method |
| CN102838197A (en) * | 2012-10-09 | 2012-12-26 | 重庆理工大学 | Method for preparing novel composite flocculant PSAFS (poly-silicate aluminum ferrous sulfate) |
| CN103771572A (en) * | 2014-02-12 | 2014-05-07 | 重庆大学 | Preparation method of polymerization chlorination zinc iron sulfate flocculating agent |
| CN105152291A (en) * | 2015-08-12 | 2015-12-16 | 成都理工大学 | PAFSI-PAME composite flocculant and preparation method thereof |
| CN110040832A (en) * | 2019-06-03 | 2019-07-23 | 滨州大宗固废资源循环利用研究院有限公司 | A kind of preparation method of the polymerization aluminium silicate-sulphate ferric flocculant based on red mud |
| CN111072256A (en) * | 2018-10-19 | 2020-04-28 | 上海申英环保科技有限公司 | Sludge dewatering method for plate and frame machine |
-
2022
- 2022-07-15 CN CN202210832417.9A patent/CN115180797A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557208A (en) * | 2011-03-10 | 2012-07-11 | 中国环境科学研究院 | Method for preparing poly aluminum ferric silicate composite flocculating agent by using red mud and ferrous sulfate |
| CN102826560A (en) * | 2012-08-29 | 2012-12-19 | 潘国雄 | Red mud resource utilization method |
| CN102838197A (en) * | 2012-10-09 | 2012-12-26 | 重庆理工大学 | Method for preparing novel composite flocculant PSAFS (poly-silicate aluminum ferrous sulfate) |
| CN103771572A (en) * | 2014-02-12 | 2014-05-07 | 重庆大学 | Preparation method of polymerization chlorination zinc iron sulfate flocculating agent |
| CN105152291A (en) * | 2015-08-12 | 2015-12-16 | 成都理工大学 | PAFSI-PAME composite flocculant and preparation method thereof |
| CN111072256A (en) * | 2018-10-19 | 2020-04-28 | 上海申英环保科技有限公司 | Sludge dewatering method for plate and frame machine |
| CN110040832A (en) * | 2019-06-03 | 2019-07-23 | 滨州大宗固废资源循环利用研究院有限公司 | A kind of preparation method of the polymerization aluminium silicate-sulphate ferric flocculant based on red mud |
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