CN115770556A - Composite carrier adsorption type flocculant and preparation method thereof - Google Patents
Composite carrier adsorption type flocculant and preparation method thereof Download PDFInfo
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- CN115770556A CN115770556A CN202211267383.XA CN202211267383A CN115770556A CN 115770556 A CN115770556 A CN 115770556A CN 202211267383 A CN202211267383 A CN 202211267383A CN 115770556 A CN115770556 A CN 115770556A
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- composite carrier
- type flocculant
- carrier adsorption
- adsorption type
- flocculant
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- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 16
- 239000010802 sludge Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000008961 swelling Effects 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 238000004537 pulping Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000006148 magnetic separator Substances 0.000 claims description 2
- 238000003306 harvesting Methods 0.000 claims 1
- 239000006249 magnetic particle Substances 0.000 abstract description 7
- 239000000725 suspension Substances 0.000 abstract description 5
- 239000002351 wastewater Substances 0.000 abstract description 5
- 238000007885 magnetic separation Methods 0.000 abstract description 4
- 230000018044 dehydration Effects 0.000 abstract description 2
- 238000006297 dehydration reaction Methods 0.000 abstract description 2
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000004090 dissolution Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 239000003921 oil Substances 0.000 description 10
- 239000010865 sewage Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005189 flocculation Methods 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 150000002505 iron Chemical class 0.000 description 2
- 238000005504 petroleum refining Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 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 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 229920005613 synthetic organic polymer Polymers 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The invention discloses a composite carrier adsorption type flocculant and a preparation method thereof, wherein tailings powder obtained after iron ore separation is used as a raw material, magnetic particles obtained after magnetic separation of the tailings powder and diatomite are prepared into suspension, polyacrylamide is added to the suspension for full dissolution, and the suspension is stirred, kept stand for curing, dried at low temperature and granulated to obtain the composite carrier adsorption type flocculant. The composite carrier adsorption type flocculant obtained by the invention can remove oil, suspended matters, organic matters and the like in oil sludge wastewater, is convenient for subsequent sludge dehydration, has low raw material price and simple process, can realize green and efficient preparation of the adsorption type flocculant, is suitable for large-scale industrial production, and has high ecological and environment-friendly benefits.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a composite carrier adsorption type flocculant for treating oily sludge wastewater generated in the petrochemical industry and a preparation method thereof.
Background
The oily sludge refers to a part of oily precipitate generated by natural and artificial precipitation of a large amount of oily wastewater generated in the production processes of oil field exploitation, petroleum refining, various industries related to crude oil and finished oil, civil use and the like. Most of domestic petroleum refining enterprises have earlier construction time, laggard treatment technology and old equipment, accumulate a large amount of old mud, and various chemical components of the oil-containing sludge interact with each other for more than ten years or even decades, so that the components are more stable, and the emulsification of oil substances is more serious.
In recent years, with the improvement of the requirements of national environmental protection laws and regulations, the environmental protection law enforcement force is continuously increased, and the pollution control and resource utilization of solid wastes generated in the production process become important problems in the petroleum industry. Oily sludge is listed in national records of hazardous wastes, and related laws such as national clean production promotion law and solid waste environmental pollution prevention and control law also require that the oily sludge must be subjected to harmless treatment.
The flocculant is mainly applied to the fields of water supply and sewage treatment, and can be divided into an inorganic flocculant and an organic flocculant according to the total chemical components. Wherein the inorganic flocculant also comprises an inorganic coagulant and an inorganic polymeric flocculant; the organic flocculant also comprises a synthetic organic polymer flocculant, a natural organic polymer flocculant and a microbial flocculant. The inorganic flocculant can be divided into an aluminum salt system and an iron salt system according to metal salts, wherein the aluminum salt is mainly aluminum sulfate and aluminum chloride, and the iron salt is mainly ferric sulfate and ferric chloride. Later, novel water treatment agents such as polyaluminium sulfate, polyferric sulfate and the like are developed and synthesized on the basis of traditional aluminum salt and ferric salt, the appearance of the novel water treatment agents not only reduces the cost, but also further improves the flocculation effect, and the novel water treatment agents are widely applied due to the popularization of raw materials. However, with the continuous development of cities, the amount of sewage is larger and larger, and the requirement on the flocculation effect is higher and higher.
Disclosure of Invention
The invention aims to provide a composite carrier adsorption type flocculant and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a composite carrier adsorption type flocculant is prepared through washing the tailings powder of iron ore, removing mud, magnetic separating by magnetic separator, mixing it with diatomite, pulping, heating to 75 +/-5 deg.C, adding polyacrylamide, swelling, stirring, laying aside for 2-3 hr, drying and granulating.
Furthermore, the magnetic field intensity used in the sorting process is less than or equal to 120mT.
Further, the average particle diameter of the granular component having magnetism is 6 to 8 μm.
Further, the mass ratio of the used granular components with magnetism to the diatomite and the polyacrylamide is 2.
Further, the diatomite has a specific surface area of 40-65 square meters per gram and a pore volume of 0.45-0.98cm for carrying out high pressure swing adsorption.
Further, the number average molecular weight of the polyacrylamide is 1000-1500 ten thousand.
Further, the drying temperature is less than or equal to 70 ℃.
Furthermore, the particle size of the composite carrier adsorption type flocculant is 0.5-1.2mm.
The obtained composite carrier adsorption type flocculant can be used for treating oily sludge, and the dosage of the flocculant is 1-1.5 wt%.
After the composite carrier adsorption type flocculating agent obtained by the invention is stirred and mixed with oily sewage, the porous diatomite component can adsorb oil, organic matters and the like in water, the polyacrylamide component can form a high molecular polymer after being dissolved in the water and plays a role in bridging, and the diatomite and the tailing powder magnetic particles (magnetite and hematite, main components of Fe are Fe) which can adsorb oil drops are subjected to bridging 3 O 4 、Fe 2 O 3 Silicon and aluminum) are combined together to form a floc group, and the magnetic particles of the tailings have higher specific gravity, so that the sinking speed of the floc group can be accelerated, and a good flocculation effect can be exerted.
The invention has the following remarkable advantages:
(1) According to the invention, by adopting the technical principle of carrier flocculation, iron ore tailings powder, diatomite and polyacrylamide are used as raw materials to prepare the composite carrier adsorption type flocculant, the formula is reasonable, the use effect is good, oil, suspended matters, organic matters and the like in oil sludge wastewater can be removed, the subsequent sludge dehydration is facilitated, and the magnetic force of an external magnetic field is combined, so that the floc sedimentation can be further accelerated, and the flocculation effect is improved.
(2) The tailing powder is a product obtained after the separation of the iron ore, belongs to solid waste, is low in price by taking the tailing powder as a raw material, can realize the recycling of the waste, and has high ecological and environment-friendly benefits.
(3) The method can realize green and efficient preparation of the adsorption flocculant, has simple process and low production cost, and is suitable for large-scale industrial production.
(4) The composite carrier adsorption type flocculant obtained by the invention is a powdery medicament, can be directly added and used in a metering manner, so that the trouble of preparing a water agent by using the traditional flocculant is eliminated, and the equipment cost is saved.
Detailed Description
A composite carrier adsorption type flocculant is prepared from tailings powder of iron ore through washing to remove mud, magnetic separation to obtain granular components (average size is 6-8 microns), mixing it with diatomite, pulping, heating to 75 +/-5 deg.C, adding polyacrylamide, swelling, stirring, laying aside for ageing for 2-3 hr, drying at 70 deg.C or lower, and granulating to obtain 0.5-1.2mm size composite carrier adsorption type flocculant.
Wherein the mass ratio of the used magnetic granular components to the diatomite and the polyacrylamide is (2). The specific surface area of the diatomite is 40-65 square meters per gram, and the pore volume is 0.45-0.98cm for carrying out plantation per gram. The number average molecular weight of the polyacrylamide is 1000-1500 ten thousand.
In order to make the content of the present invention more comprehensible, the technical solutions of the present invention are further described below with reference to specific embodiments, but the present invention is not limited thereto.
Example 1
(1) Weighing 500g of tailings powder obtained after iron ore separation, adding water, stirring and cleaning, pouring out turbid liquid to remove soil, repeatedly cleaning for 3 times, fully drying, placing the tailings powder into a magnetic separation tube, and carrying out magnetic separation under the magnetic field strength of 120mT to obtain magnetic particle components in the tailings powder, wherein the average particle size of the magnetic particle components is about 6-8 mu m (the tailings powder is crushed by a ball mill in the ore separation process).
(2) Weighing 20g of the magnetic particle component obtained in the step (1), fully stirring and mixing the magnetic particle component with 70g of diatomite and 500ml of water to form a suspension, then heating the suspension to 75 ℃, adding 10g of polyacrylamide for swelling and mixing, fully stirring, standing and curing for 2-3h to obtain mixed gel.
(3) And fully drying the obtained mixed gel at 70 ℃, and shearing and crushing to obtain the composite carrier adsorption type flocculant with the particle size of 0.5-1.2mm.
Example 2
The sedimentation treatment experiment of the oil-containing wastewater from the oil refinery of Daqing petrochemical company was performed by using pure polyacrylamide (1600 ten thousand cationic species) and the composite carrier adsorption type flocculant prepared in example 1. As a result, it was found that the turbidity of the treatment with the composite carrier adsorption-type flocculant of example 1 was 15 NTU, the sedimentation rate was 0.4mm/s and the volume of the tail sludge was 8% (8% of the total amount of oily sewage in the test) without applying an external magnetic field, whereas the turbidity of the treatment with pure polyacrylamide was 18 NTU, the sedimentation rate was 0.3mm/s and the volume of the tail sludge was 9.6%; after an external magnetic field is applied, the sedimentation velocity of the composite carrier adsorption type flocculant can be increased to 0.66mm/s, and the volume of the tail mud can be reduced to 4.4 percent, which shows that the sewage treatment effect and efficiency are greatly improved.
The oily sewage after the two flocculants are added is dewatered by adopting a centrifugal machine, the water content of the sludge treated by the pure polyacrylamide is measured to be 85%, and the water content of the sludge treated by the composite carrier adsorption type flocculant obtained in the example 1 is 70%.
The above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made according to the claims of the present invention should be covered by the present invention.
Claims (9)
1. A preparation method of a composite carrier adsorption type flocculant is characterized by comprising the following steps: the method comprises the steps of taking tailings powder obtained after separation of iron ore as a raw material, removing mud through washing, then separating magnetic granular components through a magnetic separator, mixing the magnetic granular components with diatomite for pulping, heating to 75 +/-5 ℃, adding polyacrylamide for swelling and mixing, fully stirring, standing and curing for 2-3 hours, and finally drying and granulating to obtain the composite carrier adsorption type flocculant.
2. The method for preparing a composite carrier adsorption-type flocculant according to claim 1, wherein: the magnetic field intensity used in the sorting process is less than or equal to 120mT.
3. The method for preparing a composite carrier adsorption-type flocculant according to claim 1, wherein: the average particle diameter of the granular component with magnetism is 6-8 μm.
4. The method for preparing a composite carrier adsorption-type flocculant according to claim 1, wherein: the mass ratio of all magnetic granular components to the diatomite and the polyacrylamide is 2.
5. The method for preparing a composite carrier adsorption-type flocculant according to claim 1 or 4, wherein: the diatomite has a specific surface area of 40-65 square meters per gram and a pore volume of 0.45-0.98cm for harvesting per gram.
6. The method for preparing a composite carrier adsorption-type flocculant according to claim 1 or 4, wherein: the number average molecular weight of the polyacrylamide is 1000-1500 ten thousand.
7. The method for preparing a composite carrier adsorption-type flocculant according to claim 1, wherein: the drying temperature is less than or equal to 70 ℃.
8. A composite carrier-adsorptive flocculant prepared according to the process of claim 1, wherein: the particle size of the composite carrier adsorption type flocculant is 0.5-1.2mm.
9. Use of the composite carrier adsorption type flocculant of claim 8 for treating oil-containing sludge, wherein: the dosage of the composite carrier adsorption type flocculant in the oil-containing sludge is 1-1.5wt per mill.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211267383.XA CN115770556A (en) | 2022-10-17 | 2022-10-17 | Composite carrier adsorption type flocculant and preparation method thereof |
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| CN202211267383.XA CN115770556A (en) | 2022-10-17 | 2022-10-17 | Composite carrier adsorption type flocculant and preparation method thereof |
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| CN115770556A true CN115770556A (en) | 2023-03-10 |
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| CN202211267383.XA Pending CN115770556A (en) | 2022-10-17 | 2022-10-17 | Composite carrier adsorption type flocculant and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104276643A (en) * | 2014-10-10 | 2015-01-14 | 安徽理工大学 | Method for preparing magnetic flocculating agent by compounding coal ash magnetic bead and polyacrylamide |
| CN108946835A (en) * | 2018-07-12 | 2018-12-07 | 浙江正洁环境科技有限公司 | A kind of absorption-flocculating settling agent and its preparation method and application |
| CN110420482A (en) * | 2019-08-14 | 2019-11-08 | 中国特种设备检测研究院 | A kind of composite flocculation agent for handling oil-sand mine tailing and the processing method for curing thin tailing |
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2022
- 2022-10-17 CN CN202211267383.XA patent/CN115770556A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104276643A (en) * | 2014-10-10 | 2015-01-14 | 安徽理工大学 | Method for preparing magnetic flocculating agent by compounding coal ash magnetic bead and polyacrylamide |
| CN108946835A (en) * | 2018-07-12 | 2018-12-07 | 浙江正洁环境科技有限公司 | A kind of absorption-flocculating settling agent and its preparation method and application |
| CN110420482A (en) * | 2019-08-14 | 2019-11-08 | 中国特种设备检测研究院 | A kind of composite flocculation agent for handling oil-sand mine tailing and the processing method for curing thin tailing |
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