CN204768244U - Wet flue gas desulfurization device of dual cycle - Google Patents
Wet flue gas desulfurization device of dual cycle Download PDFInfo
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- CN204768244U CN204768244U CN201520453089.7U CN201520453089U CN204768244U CN 204768244 U CN204768244 U CN 204768244U CN 201520453089 U CN201520453089 U CN 201520453089U CN 204768244 U CN204768244 U CN 204768244U
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Abstract
The utility model discloses a wet flue gas desulfurization device of dual cycle belongs to the flue gas desulfurization field, flue desulphurization unit's flue desulfurization thick liquid pond is through first circulating pump, first circulating pipe and first circulation desulfurization nozzle intercommunication, first circulation desulfurization nozzle arrangement is in the flue, flue desulfurization thick liquid pond is located first circulation desulfurization nozzle below, absorption tower desulphurization unit's absorption tower thick liquid pond is through second circulating pump, second circulating pipe and absorption tower nozzle intercommunication, the absorption tower nozzle arrangement is in the absorption tower, the absorption tower is behind the flue of the first circulation desulfurization nozzle of flue gas flow, absorption tower thick liquid pond is located the absorption tower bottom of absorption tower nozzle below. The utility model discloses a desulfurization efficiency reaches more than 98%, SO2 satisfies the minimum discharge level, when satisfying high efficiency desulfurization purpose, and the economic nature of improvement system.
Description
Technical field
The utility model belongs to flue gas desulfurization field, is applicable to the wet desulfurizing process such as Gypsum Wet, ammonia process, is especially applicable to the desulfurization renovation and improving of existing desulfurizer.
Background technology
Wet Flue Gas Desulfurization Technology because technical maturity, desulfuration efficiency are higher, investment and operating cost lower, be widely used in flue gas desulphurization field.At present, the desulfuration efficiency of wet fuel gas desulfurizing technology can reach more than 95% usually.
The guiding of national policy, impels coal steam-electric plant smoke pollutant to draw close towards minimum discharge level.Flue gas pollutant discharge will meet: particle (PM) < 5.0mg/Nm
3, SO
2< 20mg/Nm
3, NO
x< 30mg/Nm
3.Even if the coal of boiler combustion comparatively low sulfur content (as 0.8%), sulfur dioxide in flue gas concentration also will reach 2000mg/Nm
3above, meet sulfur dioxide concentration and reach minimum discharge level, desulfuration efficiency is greater than the desulfuration efficiency of 98% or higher, existing wet fuel gas desulfurizing technology will be difficult to reach so high desulfuration efficiency, its common improving one's methods is the spray number of plies increasing absorption tower, spraying layer as arranged more than 5 layers strengthens in spray flux or tower sets up the mode of current equalizer to improve desulfuration efficiency, but the mode that this simple increase spraying layer strengthens spray flux will corresponding increase circulating pump lift and power, causes the significantly increase running power consumption and cost; And in tower, set up current equalizer, also significantly can increase flue gas resistance undoubtedly, increase the operation energy consumption of desulfurization.
Utility model content
The purpose of this utility model is: provide a kind of bicirculating wet flue gas desulfurizer, and desulfuration efficiency reaches more than 98%, SO
2meet minimum discharge level, while meeting high efficiency desulfurization object, improve the economy of system.
The utility model object is realized by following technical proposals:
A kind of bicirculating wet flue gas desulfurizer, comprise the flue desulfurization device of first circulatory system and the absorption tower desulfurizer of second circulatory system, described flue desulfurization device comprises flue desulfurization stock tank, the first circulating pump, the first circulation pipe and the first circulation desulfurization nozzle, described flue desulfurization stock tank is communicated with the first circulation desulfurization nozzle through the first circulating pump, the first circulation pipe, described first circulation desulfurization arrangement of nozzles is in flue, described flue desulfurization stock tank is positioned at below the first circulation desulfurization nozzle, directly collects the first circulation desulfurization nozzle and sprays the slurries fallen; Described absorption tower desulfurizer comprises absorption tower stock tank, the second circulating pump, the second circulation pipe and absorption tower nozzle, described absorption tower stock tank is communicated with absorption tower nozzle through the second circulating pump, the second circulation pipe, described absorption tower arrangement of nozzles is in absorption tower, described absorption tower is after the flue of the first circulation desulfurization nozzle of flue gas flow, described absorption tower stock tank is positioned at bottom the absorption tower below the nozzle of absorption tower, directly collects absorption tower nozzle and sprays the slurries that fall and be communicated to described flue desulfurization stock tank.
As selection, the liquid level of slurry of the absorption tower stock tank of described absorption tower desulfurizer is greater than or equal to the stock tank liquid level of the flue desulfurization stock tank of described flue desulfurization device, and the slurries of absorption tower stock tank are overflowed in flue desulfurization stock tank by spout hole.
As selection, the smoke inlet on described absorption tower is positioned at below the nozzle of absorption tower, and exhanst gas outlet is positioned at above the nozzle of absorption tower.
As further selection, also comprise demister, described demister is between exhanst gas outlet and absorption tower nozzle.
As selection, also comprise excavationg pump, the desulfurizing byproduct of described flue desulfurization stock tank is discharged by described excavationg pump.
The beneficial effects of the utility model: bicirculating wet flue gas desulfurizer, are respectively the flue desulfurization of first circulatory system and the absorption tower desulfurization of second circulatory system.The flue desulfurization of first circulatory system is arranged in the flue gas upstream of the absorption tower desulfurization of second circulatory system.Absorbent/slurries be fed to second circulatory system absorption tower desulfurization, utilize more low-density absorbent/slurry wash be difficult to absorb lower SO
2the flue gas of concentration, simultaneously more low-density absorbent can control particle content lower in desulfurization neat stress; Absorbent/ororrhea after the absorption tower desulfurization of second circulatory system flows in the flue desulfurization stock tank of first circulatory system as the flue desulfurization of first circulatory system, the higher SO that easily absorbs with the absorbent/slurry wash of higher density
2the flue gas of concentration, flue gas, through the slurry wash of two stage cycle system, makes the desulfuration efficiency of whole technique reach more than 98%:
1, desulfuration efficiency can reach more than 98%, SO
2meet minimum discharge level.
2, cost of investment and the operating cost of high desulfurization efficiency is saved.
3, the present invention is applicable to the wet desulfurizing process such as Gypsum Wet, ammonia process.
4, the desulfurization renovation and improving of existing desulfurizer is especially applicable to.
5, place, desulfurization zone is saved.
Accompanying drawing explanation
Fig. 1 is the device schematic flow sheet of the utility model embodiment.
Detailed description of the invention
Following non-limiting examples is for illustration of the utility model.
Shown in figure 1, the present invention is applicable to the wet desulfurizing process such as Gypsum Wet, ammonia process.Be described with Gypsum Wet technique below.
For 300MW fossil-fired unit, boiler smoke tolerance 1000000Nm
3/ h, flue gas SO
2concentration 1500mg/Nm
3.Flue gas 1 in flue desulfurization 2 region of first circulatory system by highdensity slurry wash, desulfuration efficiency 80-90%, flue gas SO
2concentration is reduced to 300-150mg/Nm
3, the flue gas after the flue desulfurization 2 of first circulatory system enter the absorption tower 3 of second circulatory system by low-density slurry wash, carry out secondary desulfuration, desulfuration efficiency 90-95%, flue gas SO
2concentration is reduced to 30-7.5mg/Nm
3, whole technique desulfuration efficiency 98-99.5%.
The slurries of the absorption tower stock tank 31 of second circulatory system send into absorption tower nozzle 34 by the second circulating pump 32, second circulation pipe 33, and slurries are atomized, wash upstream flue gas, flue gas SO
2enter in slurries, the neat stress 7 after desulfurization is discharged from top, absorption tower after demister 5 demist.The absorption tower sweetening process of second circulatory system, controls more low-density slurry wash and is difficult to absorb 300-150mg/Nm
3lower SO
2the flue gas of concentration, the slurries of second circulatory system drop into absorption tower stock tank 31, serum density 1020-1100kg/m
3.
By spout hole 4, the slurries in absorption tower stock tank 31 enter in flue desulfurization 2 stock tank 21 of first circulatory system, and the liquid level of slurry 311 of the second circulatory system absorption tower stock tank is greater than or equal to the stock tank liquid level 211 of the flue desulfurization stock tank of first circulatory system.Slurries in flue desulfurization 2 stock tank 21 of first circulatory system send into the first cycle flue desulfurization nozzle 24 by the first circulating pump 22, first circulation pipe 23, and slurries are atomized, wash flue gas 1, carry out the flue desulfurization of first circulatory system.The flue desulfurization process of first circulatory system, the slurry wash controlling higher density easily absorbs 1500mg/Nm
3higher SO
2the flue gas of concentration.The serum density of first circulatory system is greater than 1150kg/m
3.
Accessory substance after desulfurization is discharged by excavationg pump 6.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a bicirculating wet flue gas desulfurizer, it is characterized in that: comprise the flue desulfurization device of first circulatory system and the absorption tower desulfurizer of second circulatory system, described flue desulfurization device comprises flue desulfurization stock tank, first circulating pump, first circulation pipe and the first circulation desulfurization nozzle, described flue desulfurization stock tank is through the first circulating pump, first circulation pipe is communicated with the first circulation desulfurization nozzle, described first circulation desulfurization arrangement of nozzles is in flue, described flue desulfurization stock tank is positioned at below the first circulation desulfurization nozzle, direct collection first circulation desulfurization nozzle sprays the slurries fallen, described absorption tower desulfurizer comprises absorption tower stock tank, the second circulating pump, the second circulation pipe and absorption tower nozzle, described absorption tower stock tank is communicated with absorption tower nozzle through the second circulating pump, the second circulation pipe, described absorption tower arrangement of nozzles is in absorption tower, described absorption tower is after the flue of the first circulation desulfurization nozzle of flue gas flow, described absorption tower stock tank is positioned at bottom the absorption tower below the nozzle of absorption tower, directly collects absorption tower nozzle and sprays the slurries that fall and be communicated to described flue desulfurization stock tank.
2. bicirculating wet flue gas desulfurizer as claimed in claim 1, it is characterized in that: the liquid level of slurry of the absorption tower stock tank of described absorption tower desulfurizer is greater than or equal to the stock tank liquid level of the flue desulfurization stock tank of described flue desulfurization device, and the slurries of absorption tower stock tank are overflowed in flue desulfurization stock tank by spout hole.
3. bicirculating wet flue gas desulfurizer as claimed in claim 1, is characterized in that: the smoke inlet on described absorption tower is positioned at below the nozzle of absorption tower, and exhanst gas outlet is positioned at above the nozzle of absorption tower.
4. bicirculating wet flue gas desulfurizer as claimed in claim 3, is characterized in that: also comprise demister, and described demister is between exhanst gas outlet and absorption tower nozzle.
5. bicirculating wet flue gas desulfurizer as claimed in claim 1, is characterized in that: also comprise excavationg pump, and the desulfurizing byproduct of described flue desulfurization stock tank is discharged by described excavationg pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520453089.7U CN204768244U (en) | 2015-06-29 | 2015-06-29 | Wet flue gas desulfurization device of dual cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520453089.7U CN204768244U (en) | 2015-06-29 | 2015-06-29 | Wet flue gas desulfurization device of dual cycle |
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| Publication Number | Publication Date |
|---|---|
| CN204768244U true CN204768244U (en) | 2015-11-18 |
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ID=54508375
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|---|---|---|---|
| CN201520453089.7U Active CN204768244U (en) | 2015-06-29 | 2015-06-29 | Wet flue gas desulfurization device of dual cycle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107569998A (en) * | 2017-09-27 | 2018-01-12 | 湖南新龙矿业有限责任公司 | A kind of mine tailing smelts three wastes desulphurization system and method |
-
2015
- 2015-06-29 CN CN201520453089.7U patent/CN204768244U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107569998A (en) * | 2017-09-27 | 2018-01-12 | 湖南新龙矿业有限责任公司 | A kind of mine tailing smelts three wastes desulphurization system and method |
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