CN104071819B - A kind of gravity treatment air blast oxidation purification technique and device thereof - Google Patents
A kind of gravity treatment air blast oxidation purification technique and device thereof Download PDFInfo
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- CN104071819B CN104071819B CN201410329465.1A CN201410329465A CN104071819B CN 104071819 B CN104071819 B CN 104071819B CN 201410329465 A CN201410329465 A CN 201410329465A CN 104071819 B CN104071819 B CN 104071819B
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- air blast
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- slurries
- oxidation
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Abstract
The invention provides a kind of gravity treatment air blast oxidation purification technique and device thereof, belong to field of environment engineering.In this technology utilization aeration mixing pit, embedded pipeline adds waste residue and process water, blasts air make Ca (OH) by lower end air-blast device
2become carbonate deposition.Floor height Cl on mixing pit
-clear liquid is by the upflow tube overflow at top, pond.Lower floor's slurries are under the effect of oxidation air and current, and by gravity treatment principle by filtering net, the alkaline suspensions that particle separation diameter is tiny and impurity insolubles, wherein the insolubles of bottom is arranged outward through slag notch, the CaCO the most at last after advanced treatment
3slurries are discharged through grout outlet.The CaCO discharged
3slurries both can be used as wet desulphurization agent, also can as calcium carbonate superfine powder raw material after filter-press dehydration.The CaCO that treatment process described in utilization is purified
3possess excellent alkalescence and less particle size, cost-saving, reduce the stacking of alkaline residue and this kind of chemical sludge of carbide slag, achieve balanced growth that is economic and social double benefit.
Description
Technical field
The present invention relates to field of environment engineering, refer to a kind of gravity treatment air blast oxidation purification technique and device thereof especially.
Background technology
Carbide slag and chlor-alkali plant alkaline residue are as industrial solid castoff, and wherein the overwhelming majority is Ca (OH)
2and CaCO
3material, its purity is higher, and alkalescence is comparatively strong, possesses the condition being applied to the operation such as flue gas desulfurization and calcium carbonate superfine powder feedstock capture, but is wherein mixed with SiO
2, Al
2o
3, the large granular impurity such as acid insolubles, purity drop will certainly be caused if be directly used or increased energy consumption.Therefore the purification process for this kind of industrial solid castoff just seems especially important, if the successful extraction of effective constituent can be realized, then can alleviate the raw material supply problem of current calcium carbonate superfine powder, the desulfurization operation cost of steel mill and thermal power plant can be saved again as wet desulphurization agent, be achieve " waste recycling ", both process both and piled up the Heavy environmental pollution problem caused, provide new thinking for the source of chemical industry calcium carbonate superfine powder and the exploitation of flue gas desulfurization field Cheap highly effective sweetening agent again.
Calcium carbonate superfine powder is as a kind of new inorganic material in recent years, to have a wide range of applications and consumption is huge, and our current calcium carbonate superfine powder output is very low, and product is single, can not meet market demand far away in industries such as plastics, rubber, papermaking, coating; And along with the increasingly stringent of thermal power plant and steel industry desulfurization discharge index, the requirement for sweetening agent grade also increases day by day, therefore find and a kind ofly not only possessed sweetening agent compared with high alkalinity but also relatively inexpensive and also just become one of problem paid close attention to most at present.Patent of invention for chlor-alkali plant alkaline residue advanced treatment and application is almost in blank, China existing patent as: ZL200810029591.X " utilizes removing boiler flue gas sulphur dioxide with white slime from ammonia alkali factory to produce the method for gypsum ", ZL201210010236.4 " a kind of device for liquefied gas alkaline mud desulfurization and neutralization and treatment process ", ZL201210176565.6 " combined method of caustic sludge desulfuration dephenolize neutralization and tail gas desulfurization process and device ", ZL200820224851.4 " brings the wet-type ball mill of stream into ", ZL200820224850.X " wet-type ball mill of band feed chute ", ZL201210285911.4 " a kind of papermaking midcourse wastewater and white clay compound desulfurizing process ", ZL201210285911.4 " a kind of papermaking midcourse wastewater and white clay compound desulfurizing process " etc., only that alkaline residue (being commonly called as " white clay ") is directly levigate as Raw material processing or be directly applied in flue gas desulfurization field, and temporarily needleless to the patent of invention of the process of chlor-alkali plant alkaline residue and application, and do not consider to carry out accurate caustic sludge desulfuration agent consumption by advanced treatment purifying before, the operating load of reduction system, reduce the serum recycle amount additional because of doping impurity, and the CaCO that this technique gravity treatment obtains after purifying
3fine powder for the material storage of calcium carbonate superfine powder, can also realize the comprehensive utilization that this kind of industrial solid castoff is efficient and multi-field.
Summary of the invention
The technical problem to be solved in the present invention is the purification recycling problem for chlor-alkali plant alkaline residue and this kind of alkaline industrial solid castoff of carbide slag, provides a kind of gravity treatment air blast oxidation purification technique and device thereof.
This device comprises water outlet, grout outlet, slag notch, roots blower air blast inlet mouth, filtering net, material and process water import, pulp water mixing zone; Wherein, water outlet, grout outlet and slag notch are arranged in this device homonymy, and water outlet is positioned at above grout outlet, and grout outlet is positioned at above slag notch; Slag notch and roots blower air blast inlet mouth are arranged on lower end, pulp water mixing zone, and both sides of living apart; Filtering net is arranged on device inside, at material and between process water import and this device outer wall, conically arranges one week along pipeline outer wall; Material and process water import are arranged on this device central position; Pulp water mixing zone is positioned at this device bottom.
In this device, water outlet is arranged on below device top 1/4 place, to ensure that in supernatant liquor, solid content is minimum; Grout outlet is arranged on below device top 3/4 place, the high density slurries of the overwhelming majority can be discharged, and the impurity that effectively prevent Large stone is mixed in slurries; Caliber φ selected by slag notch is 10-2000mm, for discharging SiO
2, Al
2o
3deng impurity;
Roots blower air blast inlet mouth is arranged on slag notch offside, and selected by roots blower air blast inlet mouth, caliber φ is 10-2000mm, and the Root's blower pressure that connects is 0.01-0.8MPa, and air quantity is 6-60m
3/ min, for blasting oxidation air from bottom, forces Ca in slurries (OH)
2in Ca
2+change carbonate deposition in pulp water mixing zone;
Filtering net is horizontal by 45 degree, and aperture is 100-300 order, for passing through Gravity separation fine grain size CaCO
3with coarse grain footpath impurity;
Material and process water import are arranged at device interior central area, are the embedded structure of round shape, are of a size of 0.2-6m, for convey materials and add process water;
Pulp water mixing zone is arranged on device bottom, is conical structure, is highly 1-3m, and internal diameter, with device internal diameter, is 1-10m, for collecting the Large stone solid impurity that cannot be deposited by filtering net.
This device relates to a kind of gravity treatment air blast oxidation purification technique, be specially: alkali factory alkaline residue and carbide slag and process water are joined in this device by material and process water import, the alkali factory alkaline residue added and carbide slag are sunken to the pulp water mixing zone of device lower end, then, oxidation air is blasted from roots blower air blast inlet mouth, by gravity treatment effect, the effective alkaline components of the fine grain size in material is made to be suspended in device through filtering net, form slurries, meanwhile, continuing to blast and make Ca in slurries (OH) due to oxidation air
2in Ca
2+all be converted into CaCO
3, after oxidation fan completes one-period (30 ~ 40 minutes) stopping, setting whole slurries system at rest 8 ~ 10 minutes, make CaCO in slurries
3solid matter is deposited on grout outlet position, and upper strata is containing Cl
-the higher clear liquid of concentration is arranged outward by water outlet overflow, CaCO
3slurries flow into serum pot by grout outlet, and the macrobead solid residue be deposited in bottom pulp water mixing zone is arranged outward through slag notch, and whole technique runs without interruption with periodic circulation.
The beneficial effect of technique scheme of the present invention is as follows:
In such scheme, through the CaCO that grout outlet is discharged
3fine particle or powder, directly can be used as wet process of FGD sweetening agent, or through filter-press dehydration at the raw material of processing as calcium carbonate superfine powder powder.This method technique is simple, and equipment is few, is easy to safeguard and cleaning, and the device processes cycle is short, energy efficient, and can adapt to long-time continued running, can ensure the supply of wet desulphurization agent or calcium carbonate superfine powder raw material to greatest extent.Of the present inventionly there is having filled up current domestic advanced treatment on this class alkalescence industrial solid castoff of such as chlor-alkali plant alkaline residue or carbide slag and the blank in recycling, can meet via the effective alkaline components after gravity treatment oxidation purification the present situation that higher-grade, cheap fume desulfurizing agent are badly in need of in domestic steel mill and thermal power plant; Alleviate the problem such as under-supply of domestic calcium carbonate superfine powder raw material, achieve " waste recycling ", turn waste into wealth, eliminate white clay and pile up the Heavy environmental pollution caused, also provide the raw material with great economic benefit for flue gas desulfurization and calcium carbonate superfine powder processing etc. are multi-field.
Accompanying drawing explanation
Fig. 1 is gravity treatment air blast oxidation purification apparatus structure schematic diagram of the present invention.
[main element nomenclature]
1-water outlet, 2-grout outlet, 3-slag notch, 4-roots blower air blast inlet mouth, 5-filtering net, 6-material and process water entrance, 7-pulp water mixing zone.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The present invention is directed to the purification recycling problem of chlor-alkali plant alkaline residue and this kind of alkaline industrial solid castoff of carbide slag, a kind of gravity treatment air blast oxidation purification technique and device thereof are provided.
As shown in Figure 1, be gravity treatment air blast oxidation purification apparatus structure schematic diagram of the present invention, this device comprises water outlet 1, grout outlet 2, slag notch 3, roots blower air blast inlet mouth 4, filtering net 5, material and process water import 6, pulp water mixing zone 7; Wherein, water outlet 1, grout outlet 2 and slag notch 3 are arranged in this device homonymy, and water outlet 1 is positioned at above grout outlet 2, and grout outlet 2 is positioned at above slag notch 3; Slag notch 3 and roots blower air blast inlet mouth 4 are arranged on lower end, pulp water mixing zone 7, and both sides of living apart; Filtering net 5 is arranged on device inside, at material and between process water import 6 and this device outer wall, conically arranges one week along pipeline outer wall; Material and process water import 6 are arranged on this device central position; Pulp water mixing zone 7 is positioned at this device bottom.
Designing this device length is 5m; Water outlet 1 caliber is 20mm, is arranged in apart from device top 1/4 place; Grout outlet 2 caliber is 50mm, is arranged in apart from device top 3/4 place; Slag notch 3 caliber is 80mm; Roots blower air blast inlet mouth 4 caliber is 100mm, and Root's blower pressure is 0.08MPa, air quantity 20m
3/ min; Filtering net 5 aperture size is 200 orders, for conical structure is arranged; Material and process water entrance 6 caliber are 0.9m; Pulp water mixing zone 7 is the design of circular cone bucket, and intended diameter is 4m, is highly 2m.
Utilize this device purification CaCO
3fine powder, alkali factory alkaline residue and carbide slag and process water is the steps include: to join in this device by material and process water import 6, the alkali factory alkaline residue added and carbide slag are sunken to the pulp water mixing zone 7 of device lower end, then, oxidation air is blasted, by gravity treatment effect from roots blower air blast inlet mouth 4, the effective alkaline components of the fine grain size in material is made to be suspended in device through filtering net 5, form slurries, meanwhile, continuing to blast and make Ca in slurries (OH) due to oxidation air
2in Ca
2+all be converted into CaCO
3, after oxidation fan completes one-period (30 minutes) stopping, setting whole slurries system at rest 10 minutes, make CaCO in slurries
3solid matter is deposited on grout outlet 2 position, and upper strata is containing Cl
-the higher clear liquid of concentration is arranged outward by water outlet 1 overflow, CaCO
3slurries flow into serum pot by grout outlet 2, and be deposited in the macrobead solid residue row outside slag notch 3 bottom pulp water mixing zone 7, whole technique runs without interruption with periodic circulation.The CaCO obtained
3fine particle or powder, directly can be used as wet process of FGD sweetening agent, or through filter-press dehydration at the raw material of processing as calcium carbonate superfine powder powder.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a gravity treatment air blast oxidation purification device, is characterized in that: this device comprises water outlet (1), grout outlet (2), slag notch (3), roots blower air blast inlet mouth (4), filtering net (5), material and process water import (6), pulp water mixing zone (7); Wherein, water outlet (1), grout outlet (2) and slag notch (3) are arranged in this device homonymy, and water outlet (1) is positioned at grout outlet (2) top, grout outlet (2) is positioned at slag notch (3) top; Slag notch (3) and roots blower air blast inlet mouth (4) are arranged on pulp water mixing zone (7) lower end, and both sides of living apart; Filtering net (5) is arranged on device inside, is positioned at material and between process water import (6) and this device outer wall, conically arranges one week along pipeline outer wall; Material and process water import (6) are arranged on this device central position; Pulp water mixing zone (7) is positioned at this device bottom.
2. a kind of gravity treatment air blast oxidation purification device according to claim 1, it is characterized in that: water outlet (1) is arranged in 1/4 place below this device top, grout outlet (2) is arranged in 3/4 place below this device top, the selected caliber of slag notch (3)
for 10-2000mm.
3. a kind of gravity treatment air blast oxidation purification device according to claim 1, it is characterized in that: roots blower air blast inlet mouth (4) and slag notch (3) are symmetrical arranged, the selected caliber φ of roots blower air blast inlet mouth (4) is 10-2000mm, the Root's blower pressure that connects is 0.01-0.8MPa, and air quantity is 6-60m
3/ min.
4. a kind of gravity treatment air blast oxidation purification device according to claim 1, is characterized in that: filtering net (5) is horizontal by 45 degree, and aperture is 100-300 order; Material and process water import (6) are arranged on device inner hub location, are the embedded structure of round shape, are of a size of 0.2-6m; Pulp water mixing zone (7) is positioned at device bottom, is conical structure, is highly 1-3m, and internal diameter, with device internal diameter, is 1-10m; This purifying plant height is 1-8m.
5. a gravity treatment air blast oxidation purification technique, adopt gravity treatment air blast oxidation purification device as claimed in claim 1, it is characterized in that: alkali factory alkaline residue and carbide slag and process water are joined in this device by material and process water import (6), the alkali factory alkaline residue added and carbide slag are sunken to the pulp water mixing zone (7) of device lower end, then, oxidation air is blasted from roots blower air blast inlet mouth (4), by gravity treatment effect, the effective alkaline components of the fine grain size in material is made to be suspended in device through filtering net (5), form slurries, simultaneously, continuing to blast and make Ca in slurries (OH) due to oxidation air
2in Ca
2+all be converted into CaCO
3, after oxidation fan completes one-period stopping, setting whole slurries system at rest 8 ~ 12 minutes, make CaCO in slurries
3solid matter is deposited on grout outlet (2) position, and upper strata is containing Cl
-the higher clear liquid of concentration is arranged outward by water outlet (1) overflow, CaCO
3slurries flow into serum pot by grout outlet (2), and the macrobead solid residue being deposited in bottom, pulp water mixing zone (7) is arranged outward through slag notch (3), and whole technique runs without interruption with periodic circulation.
6. a kind of gravity treatment air blast oxidation purification technique according to claim 5, is characterized in that: the time that oxidation fan completes one-period is 30 ~ 40 minutes.
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|---|---|---|---|
| CN201410329465.1A CN104071819B (en) | 2014-07-11 | 2014-07-11 | A kind of gravity treatment air blast oxidation purification technique and device thereof |
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| CN104071819A CN104071819A (en) | 2014-10-01 |
| CN104071819B true CN104071819B (en) | 2015-09-09 |
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| CN113019714B (en) * | 2021-03-04 | 2022-08-09 | 中国科学院过程工程研究所 | Impurity removal system device and impurity removal method for carbide slag |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1211222A1 (en) * | 2000-11-17 | 2002-06-05 | Messer France S.A. | Process and plant for obtaining a CO2-enriched gas stream |
| CN102583484A (en) * | 2012-02-23 | 2012-07-18 | 池州凯尔特纳米科技有限公司 | Carbonization kettle and method for preparing nanometer calcium carbonate by using same |
| CN202657975U (en) * | 2012-05-28 | 2013-01-09 | 石家庄市苍山钙业有限公司 | Light calcium carbonate production classification diaphragm carbonization device |
| CN204057989U (en) * | 2014-07-11 | 2014-12-31 | 北京科技大学 | A kind of gravity treatment air blast oxidation purification device |
-
2014
- 2014-07-11 CN CN201410329465.1A patent/CN104071819B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1211222A1 (en) * | 2000-11-17 | 2002-06-05 | Messer France S.A. | Process and plant for obtaining a CO2-enriched gas stream |
| CN102583484A (en) * | 2012-02-23 | 2012-07-18 | 池州凯尔特纳米科技有限公司 | Carbonization kettle and method for preparing nanometer calcium carbonate by using same |
| CN202657975U (en) * | 2012-05-28 | 2013-01-09 | 石家庄市苍山钙业有限公司 | Light calcium carbonate production classification diaphragm carbonization device |
| CN204057989U (en) * | 2014-07-11 | 2014-12-31 | 北京科技大学 | A kind of gravity treatment air blast oxidation purification device |
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| CN104071819A (en) | 2014-10-01 |
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Inventor after: Tong Zhensong Inventor after: Song Cunyi Inventor after: Lu Xining Inventor after: Chang Guanqin Inventor after: Xing Yi Inventor after: Wang Li Inventor after: Liang Baorui Inventor after: Wang Senlin Inventor before: Song Cunyi Inventor before: Lu Xining Inventor before: Tong Zhensong Inventor before: Chang Guanqin Inventor before: Xing Yi Inventor before: Wang Li Inventor before: Liang Baorui Inventor before: Wang Senlin |
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Effective date of registration: 20221026 Address after: Room A-4645, Building 3, No. 20 Yong'an Road, Shilong Economic Development Zone, Mentougou District, Beijing, 102308 Patentee after: BEIJING BEIKE ENVIRONMENTAL ENGINEERING CO.,LTD. Address before: 100083 No. 30, Haidian District, Beijing, Xueyuan Road Patentee before: University OF SCIENCE AND TECHNOLOGY BEIJING |
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