CN102773004B - Two-stage aeration air supply device for promoting wet flue gas desulfurization slurry oxidization - Google Patents
Two-stage aeration air supply device for promoting wet flue gas desulfurization slurry oxidization Download PDFInfo
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- CN102773004B CN102773004B CN201210254641.0A CN201210254641A CN102773004B CN 102773004 B CN102773004 B CN 102773004B CN 201210254641 A CN201210254641 A CN 201210254641A CN 102773004 B CN102773004 B CN 102773004B
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Abstract
Disclosed is a two-stage aeration air supply device for promoting wet flue gas desulfurization slurry oxidization. A primary aeration device mainly comprises a slurry spray gun arranged at the bottom of a slurry tank, a nozzle of the slurry spray gun is downward, slurry with entrained air is sprayed out of the nozzle and then sprayed to the bottom of an absorption tower, gas-liquid disturbance is enhanced by means of rebound ascent, gas-liquid mixture is strengthened, and the utilization rate of oxygen is higher than 98%. A secondary aeration air supply device mainly comprises oxidized air aeration pipes parallelly arranged in the absorption tower and is mounted above the primary aeration device and connected with a roots blower. Air is disturbed and mixed with the slurry sprayed out of the primary aeration device after sprayed out of air holes of the aeration pipes, and the utilization rate of oxygen is improved and is higher than 30%. The two-stage aeration air supply device is simple in structure and convenient to overhaul, and has the advantages that the oxidized air is uniformly distributed in the slurry and stays in the slurry for a long time, and the utilization rate of the oxygen is high. Moreover, a slurry stirrer is omitted, and power consumption of a desulfurization device is reduced.
Description
Technical field
The present invention relates to a kind of TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation, belong to flue gas desulfurization technique field.
Background technology
Coal-fired flue gas desulfurization (FGD) is to reduce on a large scale SO
2one of effective way of discharge, wherein calcium-base absorbing agent wet process of FGD (WFGD) occupies leading position, and calcium-base absorbing agent mainly contains lime stone (main component CaCO
3), also have in addition Industrial Solid Waste carbide slag (main component Ca (OH)
2).In wet fuel gas desulfurizing technology, the oxidation of calcium sulfite is an important chemical process, and the height of its oxidation efficiency is directly connected to SO
2removal efficiency and the quality of accessory substance gypsum, therefore often improve the oxidation efficiency of calcium sulfite by the mode of forced oxidation.In forced oxidation type wet flue gas desulfurization absorption tower, the supply mode of oxidation air directly affects utilization rate and the system run all right of oxygen, when serious, can cause fouling and obstruction in tower, therefore, for the form on absorption tower, arranging of rational oxidation air feedway is most important.
Common oxidation air feedway mainly contains two kinds: (1) spray gun oxidation air feedway, in absorption tower, be provided with multiple side-feeding type slurry mixers, before each side-feeding type slurry mixer, be provided with a spray gun, spray gun is ejected into oxidation air in the front of side-feeding type slurry mixer rotary blade, utilize agitator paddle rotational kinetic energy that oxidation air bubble is smashed, and then oxidation air is evenly distributed in slurries.In number of patent application 200810018955.4, disclose a kind of flue gas wet desulfurization absorption oxidation device, be provided with oxidation spray gun and agitator in absorption tower, the two is arranged on same layer correspondingly, and oxidation spray gun is positioned at corresponding agitator top.(2) ductwork type oxidation air feedway, bottom, absorption tower is provided with slurry mixer, slurry mixer top is provided with ductwork type oxidation air nozzle, and oxidation air nozzle blasts oxidation air in slurries, and feature is that oxidation air nozzle is uniformly distributed in slurry pool.In number of patent application 200820154341.4, disclose a kind of oxidation air feedway of wet flue gas desulfurization absorption tower, combined above two kinds of oxidation air feedwaies; This device comprises multiple annular oxidation air feedwaies that the spray gun in absorption tower, each spray gun side are provided with side-feeding mixer and are arranged on absorption tower central authorities that are arranged on.Number of patent application 200720058633.3 has been announced a kind of air oxidation device for wet process of FGD, comprise and be communicated with the slurries circulation pipe of internal upper part space, absorption tower and bottom stock tank and be arranged on the slurry circulating pump on slurries circulation pipe, utilization is arranged on and when throttling arrangement on slurries loop branch pipe flows slurries, produces pressure differential, utilize pressure differential that oxidation air is sucked to absorption tower stock tank by air interface, can cancel forced oxidation blower fan, reduce the power consumption of desulfurizer.
Above-mentioned two kinds of oxidation air supply modes respectively have pluses and minuses, and spray absorption tower adopts torch-type oxidation air feedway conventionally, and JBR formula absorption tower adopts ductwork type oxidation air feedway.Torch-type oxidation air supply mode may form dead band in slurry pool central authorities, in this region the oxidation air time of staying shorter, slurries oxidation effectiveness is poor.Ductwork type oxidation air feedway is evenly arranged in whole slurry pool of absorption tower, and structure is comparatively complicated, and inspection and maintenance difficulty is larger, and oxidation air pipeline is longer, and oxidation fan energy consumption is higher.
Summary of the invention
Technology of the present invention is dealt with problems: overcome prior art deficiency, a kind of TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation is provided, simple in structure, easy access, have that oxidation air is evenly distributed in slurries, the time of staying is long, the feature that oxygen utilization rate is high, and do not use slurry mixer, reduce the power consumption of desulfurizer.
The technology of the present invention solution: a kind of TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation, comprising: one-level aerator and secondary aerator; One-level aerator comprises the slurries spray gun being arranged in absorption tower apart from 0.8-1.2m position, slurry pool bottom, the nozzle direction of slurries spray gun is downward, the slurries of entrapped air are got to bottom, absorption tower from the nozzle ejection of slurries spray gun, rise and extended the time of staying of oxidation air through bounce-back, strengthen the gas-liquid two-phase disturbance in absorption tower, made the utilization rate of oxygen more than 98%; Described secondary aeration air feeder comprises and is arranged in parallel in the oxidation air aeration tube in slurry pool in absorption tower, and described aeration tube is arranged on one-level aerator top 1.5-2.5m eminence, is connected with roots blower; Air from the ejection of described aeration tube pore with the slurries disturbance spraying from one-level aerator, mix, improved the utilization rate of oxygen, the utilization rate of oxygen is more than 30%.
The whitewashing predominant tube diameter of described slurries spray gun is 410 ~ 430mm, and tapered diameter connects the whitewashing arm diameter of nozzle at 150 ~ 200mm, and nozzle diameter, at 50 ~ 60mm, amounts to 6 nozzles, and the range of disturbance of 6 nozzles can cover whole absorption tower cross section.
The slurries spray gun of described one-level aerator connects oxidation slush pump, and oxidation slush pump is placed on outside, absorption tower, the inlet side perforate of slush pump, and opening diameter scope is 15 ~ 20mm, utilizes negative pressure air amount, forms tiny air bubble.
The diameter of described oxidation air aeration tube is 155 ~ 160mm.
Described oxidation air aeration tube adopts glass reinforced plastic pipe, and opening diameter is 5 ~ 9mm, or adopts stainless steel tube, and opening diameter is 3 ~ 5mm; Take the perforate of machine drilling mode, to cross the center line in the center of circle as the perforate of axle bilateral symmetry, the angle of perforate direction and vertical direction is 20 ° ~ 40 °, and axial hole spacing is 60 ~ 120mm.
Beneficial effect of the present invention shows the following aspects:
(1) the present invention adopts TSA air feeder, and slurries disturbance is violent, prevents from, in absorption tower, fouling or stopping state occur, and oxygen utilization rate obviously improves;
(2) one-level aerator of the present invention has been strengthened slurries disturbance, has promoted gas-solid two-phase to mix, and has extended the time of staying of bubble;
(3) in secondary aerator of the present invention, oxidation air is evenly distributed in slurries, has improved oxygen utilization rate, and aeration tube is simple in structure, and inspection and maintenance is convenient;
(4) the present invention has saved side-feeding mixer, has reduced the power consumption of desulfurizer, has avoided slurry pool mid portion because the air that stirring occurs is inhomogeneous, has improved the quality of desulfurizing byproduct gypsum.
Brief description of the drawings
Fig. 1 is TSA air feeder schematic diagram in absorption tower of the present invention;
Fig. 2 is one-level aerator top view of the present invention;
Fig. 3 is secondary aerator top view of the present invention;
Fig. 4 is aeration tube perforate schematic diagram of the present invention;
In figure: 1-1 slurry pool, 1-2 secondary aerator-aeration tube, 1-3 one-level aerator-slurries spray gun, 1-4 oxidation slush pump is carried slurries, and 1-5 roots blower blasts air; 2-1 nozzle, the 2-2 arm of whitewashing, 2-3 range of disturbance (signal), 2-4 supports, the 2-5 supervisor that whitewashes, 2-6 slurries entrance; 3-1 supports, 3-2 aeration branch pipe, 3-3 aeration supervisor, 3-4 oxidation air entrance.
Detailed description of the invention
As shown in Figure 1, top, absorption tower is desulphurization reaction section, and bottom is slurry pool 1-1, is the oxidation reaction section of calcium sulfite, and the calcium sulfite in slurries is generated the gypsum that can fully utilize by airborne dioxygen oxidation.For promoting the oxidation of calcium sulfite slurries, in slurry pool 1-1 in absorption tower, arrange TSA device, comprise the one-level aerator that is positioned at slurry pool bottom top 0.8-1.2m---slurries spray gun 1-3 and be arranged in slurry pool 1-1 central authorities,---the high secondary aerator of slurries spray gun 1-3 top 1.5-2.5m---the oxidation air aeration tube 1-2 that is positioned at one-level aerator; The nozzle direction of slurries spray gun 1-3 is downward; Air from the pore ejection of aeration tube 1-2 with the slurries strong disturbance of having carried air secretly spraying from slurries spray gun 1-3, mix, improved the utilization rate of oxygen in air.
As shown in Figure 1, the whitewashing supervisor of slurries spray gun 1-3 connects oxidation slush pump 1-4, and oxidation slush pump 1-4 is placed on outside, absorption tower, the inlet side perforate of oxidation slush pump 1-4, opening diameter, at 15-20mm, utilizes negative pressure air amount, and forms tiny air bubble.As shown in Figure 2, described whitewashing supervisor 2-5 and whitewashing arm 2-2 are fixed on the inwall of absorption tower by supporting 2-4.Whitewashing predominant tube diameter is 410 ~ 430mm, and tapered diameter connects the whitewashing arm diameter of nozzle at 150 ~ 200mm, and nozzle diameter is at 50 ~ 60mm.Amount to 6 nozzles, slurry nozzle direction is downward, and the slurries of entrapped air are got to bottom, absorption tower from described nozzle ejection, after bounce-back, rise and have extended the time of staying of bubble.Adopt 6 nozzles, slurry flow is large, has strengthened slurries disturbance, and range of disturbance 2-3 covers whole absorption tower cross section.Bounce-back is risen and has been strengthened the gas-liquid two-phase mixing in absorption tower, has increased the utilization rate of oxygen in air, and utilization rate is more than 98%.
As shown in Figure 3, the supervisor 3-3 of aeration tube 1-2 is connected with roots blower 3-4, and aeration supervisor 3-3 is arranged on outside, absorption tower, aeration branch pipe 3-2 is arranged in parallel on the inwall of absorption tower by supporting 3-1, prop up tube pitch at 1.2-1.6m, this arrangement is simple in structure, and inspection and maintenance is convenient.Aeration tube supervisor and arm diameter are 155 ~ 160mm.Machine drilling mode is taked in aeration tube 1-2 perforate, and to cross the center line in the center of circle as the perforate of axle bilateral symmetry, the angle of perforate direction and vertical direction is 20 ° ~ 40 °, as shown in Figure 4.Opening diameter 5 ~ 9mm while adopting glass reinforced plastic pipe, opening diameter 3-5mm while adopting stainless steel tube, pitch of holes is in the axial direction 60 ~ 120mm, the air velocity flowing out from pore is at 18 ~ 24m/s.Oxidation air is evenly distributed in slurries, and the utilization rate of oxygen is more than 30%.
Description of the present invention does not elaborate part and belongs to techniques well known.
Claims (6)
1. a TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation, is characterized in that comprising: one-level aerator and secondary aerator; Described one-level aerator comprises the slurries spray gun being arranged in absorption tower apart from 0.8-1.2m position, slurry pool bottom, the nozzle direction of slurries spray gun is downward, the slurries of entrapped air are got to bottom, absorption tower from the nozzle ejection of slurries spray gun, rise and extended the time of staying of oxidation air through bounce-back, strengthen the gas-liquid two-phase disturbance in absorption tower, the utilization rate of oxygen is improved; Described secondary aerator comprises and is arranged in parallel in the oxidation air aeration tube in slurry pool in absorption tower, and described aeration tube is arranged on one-level aerator top 1.5-2.5m eminence, is connected with roots blower; Slurries disturbance that air sprays with the slurries spray gun from one-level aerator from the aeration tube pore ejection of secondary aerator, mix, improved the utilization rate of oxygen.
2. a kind of TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation according to claim 1, it is characterized in that: the whitewashing predominant tube diameter of described slurries spray gun is 410～430mm, tapered diameter, connect the whitewashing arm diameter of nozzle at 150～200mm, nozzle diameter is at 50～60mm, amount to 6 nozzles, the range of disturbance of 6 nozzles can cover whole absorption tower cross section.
3. a kind of TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation according to claim 1, it is characterized in that: the slurries spray gun of described one-level aerator connects oxidation slush pump, oxidation slush pump is placed on outside, absorption tower, the inlet side perforate of slush pump, opening diameter scope is 15～20mm, utilize negative pressure air amount, form tiny air bubble.
4. a kind of TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation according to claim 1, is characterized in that: the diameter of described oxidation air aeration tube is 155～160mm.
5. a kind of TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation according to claim 1, it is characterized in that: described oxidation air aeration tube adopts glass reinforced plastic pipe, opening diameter is 5～9mm, or adopts stainless steel tube, and opening diameter is 3～5mm; Aeration tube is taked the perforate of machine drilling mode, and to cross the center line in the center of circle as the perforate of axle bilateral symmetry, the angle of perforate direction and vertical direction is 20 °～40 °, and axial hole spacing is 60～120mm.
6. a kind of TSA air feeder that promotes serous fluid processed by wet flue gas desulfurization oxidation according to claim 1, is characterized in that: after described one-level aerator, the utilization rate of oxygen is more than 98%; After described secondary aerator, the utilization rate of oxygen is more than 30%.
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|---|---|---|---|
| CN201210254641.0A CN102773004B (en) | 2012-07-21 | 2012-07-21 | Two-stage aeration air supply device for promoting wet flue gas desulfurization slurry oxidization |
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| CN201210254641.0A CN102773004B (en) | 2012-07-21 | 2012-07-21 | Two-stage aeration air supply device for promoting wet flue gas desulfurization slurry oxidization |
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| CN102773004B true CN102773004B (en) | 2014-07-30 |
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| CN103058351B (en) * | 2013-01-21 | 2014-03-05 | 青岛双瑞海洋环境工程股份有限公司 | Oxygen supply method and device suitable for ship emission seawater desulfurization |
| CN108854501A (en) * | 2018-09-10 | 2018-11-23 | 盐城市青鸟环保设备有限公司 | Waste gas treatment equipment |
| CN110523260B (en) * | 2019-09-18 | 2020-07-31 | 龙游县金怡热电有限公司 | Desulfurizing tower and desulfurizing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5665317A (en) * | 1995-12-29 | 1997-09-09 | General Electric Company | Flue gas scrubbing apparatus |
| CN101306313A (en) * | 2008-02-01 | 2008-11-19 | 国电环境保护研究院 | Flue gas wet desulfurization absorption oxidation device |
| CN202265425U (en) * | 2011-08-30 | 2012-06-06 | 中国海诚工程科技股份有限公司 | Aeration controller |
-
2012
- 2012-07-21 CN CN201210254641.0A patent/CN102773004B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5665317A (en) * | 1995-12-29 | 1997-09-09 | General Electric Company | Flue gas scrubbing apparatus |
| CN101306313A (en) * | 2008-02-01 | 2008-11-19 | 国电环境保护研究院 | Flue gas wet desulfurization absorption oxidation device |
| CN202265425U (en) * | 2011-08-30 | 2012-06-06 | 中国海诚工程科技股份有限公司 | Aeration controller |
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