CN104071819A - Process for reselecting, blasting, oxidizing and purifying and device thereof - Google Patents
Process for reselecting, blasting, oxidizing and purifying and device thereof Download PDFInfo
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- CN104071819A CN104071819A CN201410329465.1A CN201410329465A CN104071819A CN 104071819 A CN104071819 A CN 104071819A CN 201410329465 A CN201410329465 A CN 201410329465A CN 104071819 A CN104071819 A CN 104071819A
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- air blast
- gravity treatment
- outlet
- slag notch
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Abstract
The invention provides a process for reselecting, blasting, oxidizing and purifying and a device thereof, and belongs to the field of environmental engineering. The process is as follows: adding waste residue and process water by utilizing an embedded type pipeline in an aeration mixing tank, blasting air in the aeration mixing tank by a blasting device at the lower end, so that Ca(OH)2 becomes carbonate precipitates. A high Cl-clear liquid at the upper layer of the mixing tank is overflowed by an overflow tube on the top of the tank. Under action of oxidizing air and water flow, fine alkaline suspended matters and impurity insoluble with small grain size are separated from lower-layer slurry by a reselecting principle through a filter net, wherein insolubles on the bottom are exhausted outsides by a slag outlet; and finally, deeply-treated CaCO3 slurry is exhausted by the slurry outlet. The exhausted CaCO3 slurry not only can be used as a wet-process desulfurizing agent, but also can be press-filtered and dehydrated as a calcium carbonate superfine material. The CaCO3 purified by the treatment method disclosed by the invention has excellent alkalinity and smaller particle dimension, so that cost is saved, stacking of chemical waste residues such as alkaline residue and carbide slag is reduced, and balanced development of economic and social benefits is realized.
Description
Technical field
The present invention relates to field of environment engineering, refer to especially a kind of gravity treatment air blast oxidation purification technique and device thereof.
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 stronger, possesses the condition of the operations such as the flue gas desulfurization of being applied to 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, if be directly used, will certainly caused purity drop or increase energy consumption.Therefore the purification process for this class industrial solid castoff just seems especially important, if can realize the successful extraction of effective constituent, can alleviate the raw material supply problem of current calcium carbonate superfine powder, can save as wet desulphurization agent the desulfurization operation cost of steel mill and thermal power plant again, be to have realized " waste recycling ", both processed both and piled up caused serious problem of environmental pollution, again for the source of chemical industry calcium carbonate superfine powder and the exploitation of flue gas desulfurization field Cheap highly effective sweetening agent provide new thinking.
Calcium carbonate superfine powder is as a kind of new inorganic material in recent years, the industries such as plastics, rubber, papermaking, coating have a wide range of applications and consumption huge, and our current calcium carbonate superfine powder output is very low, and product is single, can not meet market demand far away; And along with the increasingly stringent of thermal power plant and steel industry desulfurization discharge index, for the requirement of sweetening agent grade, also day by day increase, therefore find a kind of not only possessed compared with high alkalinity but also relatively inexpensive sweetening agent also just become one of problem of paying close attention to most at present.For the patent of invention of chlor-alkali plant alkaline residue advanced treatment and application 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 and device that alkaline residue desulfurization dephenolize neutralization and tail gas desulfurization are processed ", ZL200820224851.4 " flows sub wet-type ball mill with pan feeding ", ZL200820224850.X " with the wet-type ball mill of 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 needleless is processed and the patent of invention of applying chlor-alkali plant alkaline residue temporarily, and do not consider by the next accurate alkaline residue doctor solution consumption of advanced treatment purifying before, the operating load of reduction system, minimizing is because of the additional slurries internal circulating load of doping impurity, and the CaCO that this technique gravity treatment obtains after purifying
3fine powder can also, for the material storage of calcium carbonate superfine powder, be realized the efficient and multi-field comprehensive utilization of this class industrial solid castoff.
Summary of the invention
The technical problem to be solved in the present invention is for the purification recycling problem of chlor-alkali plant alkaline residue and this class alkalescence industrial solid castoff of carbide slag, and a kind of gravity treatment air blast oxidation purification technique and device thereof are provided.
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 grout outlet top, and grout outlet is positioned at slag notch top; Slag notch and roots blower air blast inlet mouth are arranged on lower end, pulp water mixing zone, and the both sides of living apart; Filtering net is arranged on device inside, between material and process water import and this device outer wall, is conical and 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 following 1/4 place, device top, to guarantee that in supernatant liquor, solid content is minimum; Grout outlet is arranged on following 3/4 place, device top, most high density slurries can be discharged, and effectively avoid the impurity of large particle diameter to be mixed in slurries; The selected caliber φ of 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 the selected caliber φ of roots blower air blast inlet mouth 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 inside center region, for the embedded structure of round shape, are of a size of 0.2-6m, for delivery of material 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, cannot deposit the large particle diameter solid impurity that gets off by filtering net.
This device relates to a kind of gravity treatment air blast oxidation purification technique, be specially: Jiang Jian factory alkaline residue and carbide slag and process water join in this device by material and process water import, the alkali factory alkaline residue adding and carbide slag are sunken to the pulp water mixing zone of device lower end, then, from roots blower air blast inlet mouth, blast oxidation air, by gravity treatment effect, the effective alkaline components of fine grain size in material is 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) and stops, setting whole slurries system standing 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 that is 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, the CaCO discharging through grout outlet
3fine particle or powder, can directly be used as wet process of FGD sweetening agent, or through filter-press dehydration in processing as the raw material of calcium carbonate superfine powder powder.This method technique is simple, and equipment is few, is easy to safeguard and clean, and the device processes cycle is short, energy efficient, and can adapt to long-time continued running, can ensure to greatest extent the supply of wet desulphurization agent or calcium carbonate superfine powder raw material.Of the present inventionly there is filling up current domestic blank in the advanced treatment such as on this class alkalescence industrial solid castoff of chlor-alkali plant alkaline residue or carbide slag and recycling, via the effective alkaline components after gravity treatment oxidation purification, can meet the present situation that higher-grade, cheap fume desulfurizing agent are badly in need of in domestic steel mill and thermal power plant; Alleviated the problem such as under-supply of domestic calcium carbonate superfine powder raw material, realized " waste recycling ", turning waste into wealth, eliminated white clay and piled up the serious environmental pollution causing, is also the multi-field raw materials with great economic benefit that provide such as flue gas desulfurization and calcium carbonate superfine powder processing.
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 clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
The purification recycling problem that the present invention is directed to this class alkalescence industrial solid castoff of chlor-alkali plant alkaline residue and carbide slag, provides a kind of gravity treatment air blast oxidation purification technique and device thereof.
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 grout outlet 2 tops, and grout outlet 2 is positioned at slag notch 3 tops; Slag notch 3 and roots blower air blast inlet mouth 4 are arranged on 7 lower ends, pulp water mixing zone, and the both sides of living apart; Filtering net 5 is arranged on device inside, between material and process water import 6 and this device outer wall, is conical and 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 1/4 place, device top; Grout outlet 2 calibers are 50mm, are arranged in apart from 3/4 place, device top; Slag notch 3 calibers are 80mm; Roots blower air blast inlet mouth 4 calibers are 100mm, and Root's blower pressure is 0.08MPa, air quantity 20m
3/ min; Filtering net 5 aperture sizes are 200 orders, for conical structure is arranged; Material and process water entrance 6 calibers 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, the steps include: that Jiang Jian factory alkaline residue and carbide slag and process water join in this device by material and process water import 6, the alkali factory alkaline residue adding and carbide slag are sunken to the pulp water mixing zone 7 of device lower end, then, from roots blower air blast inlet mouth 4, blast oxidation air, by gravity treatment effect, the effective alkaline components of fine grain size in material is 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) and stops, setting whole slurries system standing 10 minutes, make CaCO in slurries
3solid matter is deposited on grout outlet 2 positions, 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, are deposited in the macrobead solid residue of 7 bottoms, pulp water mixing zone through the outer row of slag notch 3, and whole technique runs without interruption with periodic circulation.The CaCO obtaining
3fine particle or powder, can directly be used as wet process of FGD sweetening agent, or through filter-press dehydration in processing as the raw material of 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, do not departing under the prerequisite of 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, and grout outlet (2) is positioned at slag notch (3) top; Slag notch (3) and roots blower air blast inlet mouth (4) are arranged on lower end, pulp water mixing zone (7), and the both sides of living apart; Filtering net (5) is arranged on device inside, is positioned between material and process water import (6) and this device outer wall, is conical and 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 this 1/4 place, below, device top, grout outlet (2) is arranged in this 3/4 place, below, device top, and the selected caliber φ of slag notch (3) is 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) is symmetrical arranged with slag notch (3), 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 inside center position, for 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 kind of gravity treatment air blast oxidation purification device according to claim 1, relate to a kind of gravity treatment air blast oxidation purification technique, it is characterized in that: Jiang Jian factory alkaline residue and carbide slag and process water join in this device by material and process water import (6), the alkali factory alkaline residue adding and carbide slag are sunken to the pulp water mixing zone (7) of device lower end, then, from roots blower air blast inlet mouth (4), blast oxidation air, by gravity treatment effect, the effective alkaline components of fine grain size in material is 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 and stops, setting whole slurries system standing 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 that is deposited in bottom, pulp water mixing zone (7) is arranged outside 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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|---|---|---|---|
| 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 true CN104071819A (en) | 2014-10-01 |
| CN104071819B CN104071819B (en) | 2015-09-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113019714A (en) * | 2021-03-04 | 2021-06-25 | 中国科学院过程工程研究所 | Impurity removal system device and impurity removal method for carbide slag |
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| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113019714A (en) * | 2021-03-04 | 2021-06-25 | 中国科学院过程工程研究所 | Impurity removal system device and impurity removal method for carbide slag |
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| CB03 | Change of inventor or designer information |
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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