CN100518901C - Overflow device for desulfurizing adsorption tower - Google Patents
Overflow device for desulfurizing adsorption tower Download PDFInfo
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- CN100518901C CN100518901C CNB200710120403XA CN200710120403A CN100518901C CN 100518901 C CN100518901 C CN 100518901C CN B200710120403X A CNB200710120403X A CN B200710120403XA CN 200710120403 A CN200710120403 A CN 200710120403A CN 100518901 C CN100518901 C CN 100518901C
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- Prior art keywords
- overflow
- absorption tower
- overflow pipe
- pipe
- liquid level
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- 230000003009 desulfurizing effect Effects 0.000 title description 3
- 238000001179 sorption measurement Methods 0.000 title 1
- 238000010521 absorption reaction Methods 0.000 claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 52
- 239000003517 fume Substances 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 abstract description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 11
- 238000006477 desulfuration reaction Methods 0.000 abstract description 7
- 230000023556 desulfurization Effects 0.000 abstract description 6
- 239000002002 slurry Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 239000010440 gypsum Substances 0.000 description 7
- 229910052602 gypsum Inorganic materials 0.000 description 7
- 238000011010 flushing procedure Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 240000005373 Panax quinquefolius Species 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000010669 acid-base reaction Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
The present invention provides on overflow device used in flue gas desulfurization absorption column. The described overflow device includes overflow pipe and anti-siphonage pipe which is placed in the top end of overflow pipe, has an upwards opening and is communicated with atmosphere. The suction inlet of said overflow pipe in the absorption column is positioned below lowest level of normal operation of internal liquid of said absorption column, then said overflow pipe is obliquely upwards extended from the absorption column, and the highest central height mark of said overflow pipe is identical to that of overflow level of absorption column, the overflow pipe extended from the absorption column interior to column exterior is passed through highest central height mark, then is extended downwards.
Description
Technical field
The present invention relates to a kind of overflow mechanism, more specifically, relate to a kind of overflow mechanism that is used for fume desulfurating absorption tower.
Background technology
Be in the power generation process of main fuel with the coal, owing to a large amount of SO is emitted in the direct burning of coal
2, and along with the increase of energy demand, SO
2Discharge capacity also in continuous increase, and then atmosphere caused more and more serious pollution.Control SO
2Be emitted on and seem extremely important and urgent in the current environmental protection work.Control SO at present
2Discharging mainly contain three kinds of measures: desulfurization in desulfurization before the burning, the burning, the desulfurization of burning back are flue gas desulfurization.Wherein wet process of FGD is considered to ripe, the most effective control approach.
So-called wet process of FGD is the principle of using acid-base reaction substantially, makes to contain SO
2Flue gas and alkaline matter fully contact and form new material, promptly in the absorption tower with SO
2Absorb, and will slough SO
2" cleaning " flue gas enter atmosphere.This wherein uses lime stone (CaCO
3) and SO
2Reaction generates CaSO
3, and make CaSO by blasting air
3Oxidized generation gypsum (CaSO
42H
2O) be called as the limestone/gypsum method, this method desulfurization degree reaches more than 90%.Because economical, efficient, when selecting flue gas desulphurization equipment at home and abroad now, limestone/gypsum forced oxidation desulphurization system becomes the wet fuel gas desulfurizing technology of preferential selection.In this system, too high for the gypsum slurries liquid level that prevents to generate in the absorption tower, to cause gypsum slurries to flow back to former flue and cause former boiler flue corrosion from the absorption tower gas approach, high liquid level overflow mechanism must be designed in the absorption tower, so that liquid level is controlled at certain altitude.Absorption tower overflow mechanism conventional design is to pick out overflow pipe in overflow absolute altitude opening level, connects 90 ° of following curved pipes then, and establishes " U " type water seal or the pond that overflow pipe directly is inserted with water is formed water seal (referring to Fig. 1) on vertical pipe.Though these two kinds of designs can reach the purpose of control liquid level, in the process of discharging slurries, especially after using for a long time, because adhering to of gypsum body causes overflow pipe or pond to stop up easily.In addition,, when the slurries liquid level in the absorption tower does not reach the overflow absolute altitude, also may cause flue gas, can also discharge from overflow pipe, thus the acid SO of Sheng Chenging undesiredly except that from the normal discharge in top, absorption tower because overflow mechanism is positioned at overflow absolute altitude opening level place
2The aqueous solution causes corrosion to overflow pipe.Be anti-overflow pipe plug plug, need to establish the flushing water system for overflow pipe specially, system complex, investment is high.
Summary of the invention
The object of the present invention is to provide a kind of overflow mechanism that is used for fume desulfurating absorption tower, to solve the overflow pipe that causes because of overflow mechanism in the prior art blockage problem and flue gas the problem that flows by the undesired discharge of overflow pipe.
In order to address the above problem, the invention provides a kind of overflow mechanism that is used for fume desulfurating absorption tower.
Overflow mechanism provided by the present invention comprises overflow pipe and is arranged on the anti-siphonage pipe top, that upward opening communicates with atmosphere of overflow pipe, the suction inlet of described overflow pipe in the absorption tower is positioned at below the minimum liquid level of normal operation of absorption tower liquid, oblique then top picks out the absorption tower, the highest center of overflow pipe absolute altitude is consistent with absorption tower overflow liquid level absolute altitude, and the overflow pipe that extends in the absorption tower outside the tower extends downwards after through the highest center absolute altitude.
In an embodiment preferred of the present invention, the suction inlet of described overflow pipe in the absorption tower is positioned at below the minimum liquid level 200mm of normal operation of absorption tower liquid, at one more in the embodiment preferred, be positioned at below the minimum liquid level 500mm of normal operation of absorption tower liquid.
In an embodiment preferred of the present invention, the gradient that the oblique top of overflow pipe picks out the absorption tower is 30-90 °.
In an embodiment preferred of the present invention, the overflow pipe outside the absorption tower extends downwards to be 30-90 ° of angle with horizontal direction after through the highest center absolute altitude.At one more in the embodiment preferred, extend vertically downward.
In an embodiment preferred of the present invention, can communicate with other pipeline through the overflow pipe that extends downwards behind the absolute altitude of the highest center, at one more in the embodiment preferred, described other pipeline is a trench.
The suction inlet of overflow pipe is lower than the normal minimum liquid level that moves in the absorption tower in the absorption tower by making in the present invention, can prevent the undesired discharge of flue gas; Overflow pipe is designed to " η " form, and the solid of separating out in the slurries can not be deposited in the overflow pipe, therefore can be in case line clogging; The top design anti-siphonage pipe can prevent the siphon that causes because of " η " shape pipeline, therefore has outstanding technique effect.Because this overflow mechanism is simple, do not need flushing water again, reduced investment, the conserve water resource and the energy have outstanding environment-friendly advantage.
Description of drawings
Fig. 1 is the schematic diagram as the overflow mechanism that is used for fume desulfurating absorption tower of prior art.
Fig. 2 is provided by the present invention, is used for the schematic diagram of a preferred embodiment of the overflow mechanism of fume desulfurating absorption tower.
The specific embodiment
Below, in conjunction with the accompanying drawings embodiments of the invention are elaborated.
Fig. 1 is the schematic diagram as the overflow mechanism that is used for the limestone-gypsum flue gas desulfurizing absorption tower of prior art.In Fig. 1, flue gas enters absorption tower 1 by gas approach 5, and the liquid level in the absorption tower can have overflow liquid level 6, and the highest operation liquid level 7 is normally moved liquid level 8 and minimum operation liquid level 9.Overflow pipe 2 is opened on overflow liquid level 6 absolute altitude level places, connects 90 ° of following curved pipes then, and establishes the water seal of " U " type and insert trench 4 again on vertical pipe.On the overflow pipe sidewall that extends, be connected to flushing pipe 11 downwards, be used to wash overflow pipe.On flushing pipe 11, be furnished with valve 10, be used to control the flow of flushing.
Fig. 2 is provided by the present invention, is used for the schematic diagram of a preferred embodiment of the overflow mechanism of fume desulfurating absorption tower.In Fig. 2, flue gas enters absorption tower 1 by gas approach 5, and the liquid level in the absorption tower can have overflow liquid level 6, and the highest operation liquid level 7 is normally moved liquid level 8 and minimum operation liquid level 9.The suction inlet of overflow pipe 2 in absorption tower 1 is positioned at the minimum liquid level of normal operation of absorption tower 1 liquid below 9, the extension of oblique then top picks out absorption tower 1, overflow pipe 2 the highest center absolute altitudes 12 are consistent with absorption tower 1 overflow liquid level, 6 absolute altitudes, and the overflow pipe 2 that extends in absorption tower 1 outside the tower is extending downwards through the highest center absolute altitude 12 backs.Anti-siphonage pipe 3 is arranged on the top of overflow pipe 2, and upward opening.
Normal operation liquid level is meant that liquid not have present liquid level under the situation about fluctuating in the absorption tower in the absorption tower, and the highest operation liquid level and minimum operation liquid level are meant peak that the liquid that is in normal operation liquid level is increased to owing to the fluctuation that is produced or the minimum that reduces in technical process.Flood level then is meant when liquid level reaches this value, needs overflow pipe that liquid is drained outside the tower, is not higher than this water level to guarantee the water level in the tower.
The opening of overflow pipe 2 in absorption tower 1 will be lower than the minimum liquid level of the normal operation of slurries in the tower, overflow from overflow pipe 2 for preventing flue gas, the suction inlet of overflow pipe 2 in tower will be lower than the minimum liquid level 9 of the normal operation of slurries in the tower, the minimum liquid level 9 that is lower than the normal operation of slurries in the absorption tower 1 in a preferred embodiment is 200mm at least, more is lower than slurries normally move on the absorption tower 1 in minimum liquid level 9 500mm at least in the embodiment preferred at one.The oblique top of overflow pipe picks out absorption tower 1, and the gradient of overflow pipe 2 oblique tops is 30-90 ° in a preferred embodiment, and overflow pipe 2 gradient above oblique is 45 ° in an optimum implementation.The highest center of overflow pipe absolute altitude 12 is consistent with absorption tower 1 overflow liquid level, 6 absolute altitudes, and absorption tower 1 outer overflow pipe 2 extends in access trench 4 or other containers or the pipeline, in a preferred embodiment downwards.Absorption tower 1 outer overflow pipe 2 extends downwards to be 30-90 ° of angle with horizontal direction, in a most preferred embodiment.Absorption tower 1 outer overflow pipe 2 extends vertically downward.For preventing that siphonage from taking place, at the overflow pipe top anti-siphonage pipe 3 is set, described anti-siphonage pipe 3 extends upward and opening communicates with atmosphere, to prevent because siphonage absorption tower 1 interior liquid is discharged through overflow pipe.
Embodiment
In the present embodiment, overflow pipe 2 (DN250: caliber 250mm, the low 500mm of minimum liquid level of suction inlet normal operation of slurries in tower internal ratio tower down together), 45 ° upwards pick out the absorption tower then, the highest center of overflow pipe absolute altitude is consistent with absorption tower overflow liquid level absolute altitude, and the outer overflow pipe of tower inserts trench 4 vertically downward.For preventing that siphonage from taking place, and is provided with anti-siphonage pipe 3 (DN100) at overflow pipe 1 top.
This overflow mechanism is simple, does not need flushing water, and overflow pipe clogging, reduced investment can not occur.
Be necessary to be pointed out that at this above specific embodiment only is used for the present invention is further specified; can not be interpreted as limiting the scope of the invention; those skilled in the art can content make some nonessential improvement and adjustment to the present invention according to the present invention, but all falls within the scope of protection of the present invention.
Claims (9)
1. overflow mechanism that is used for fume desulfurating absorption tower (1), it is characterized in that, described overflow mechanism comprises overflow pipe (2) and is arranged on the top of overflow pipe (2), the anti-siphonage pipe that upward opening communicates with atmosphere (3), the suction inlet of overflow pipe (2) in absorption tower (1) is positioned at below the minimum liquid level (9) of normal operation of absorption tower (1) liquid, oblique then top picks out absorption tower (1), overflow pipe (2) the highest center absolute altitudes (12) are consistent with absorption tower (1) overflow liquid level (6) absolute altitude, and the overflow pipe (2) that extends in absorption tower (1) outside the tower extends downwards after through the highest center absolute altitude (12).
2. overflow mechanism according to claim 1 is characterized in that, the gradient that the oblique top of overflow pipe (2) picks out absorption tower (1) is 30-90 °.
3. overflow mechanism according to claim 2 is characterized in that, the gradient that the oblique top of overflow pipe (2) picks out absorption tower (1) is 45 °.
4. according to the described overflow mechanism of arbitrary claim among the claim 1-3, it is characterized in that the suction inlet of overflow pipe (2) in absorption tower (1) is positioned at the minimum liquid level (9) of normal operation of absorption tower (1) liquid below the 200mm.
5. overflow mechanism according to claim 4 is characterized in that, the suction inlet of overflow pipe (2) in absorption tower (1) is positioned at the minimum liquid level (9) of normal operation of absorption tower (1) liquid below the 500mm.
6. according to the described overflow mechanism of arbitrary claim among the claim 1-3, it is characterized in that the overflow pipe (2) of absorption tower (1) is extending to be 30-90 ° of angle with horizontal direction through the highest center absolute altitude (12) back downwards.
7. overflow mechanism according to claim 6 is characterized in that, absorption tower (1) outer overflow pipe (2) extends after through the highest center absolute altitude (12) vertically downward.
8. according to the described overflow mechanism of arbitrary claim among the claim 1-3, it is characterized in that the overflow pipe (2) that extends through the highest center absolute altitude (12) back can communicate with other pipeline (4) downwards.
9. overflow mechanism according to claim 8 is characterized in that, described other pipeline (4) is a trench.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710120403XA CN100518901C (en) | 2007-08-17 | 2007-08-17 | Overflow device for desulfurizing adsorption tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710120403XA CN100518901C (en) | 2007-08-17 | 2007-08-17 | Overflow device for desulfurizing adsorption tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101164671A CN101164671A (en) | 2008-04-23 |
| CN100518901C true CN100518901C (en) | 2009-07-29 |
Family
ID=39333607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710120403XA Active CN100518901C (en) | 2007-08-17 | 2007-08-17 | Overflow device for desulfurizing adsorption tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100518901C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674162A (en) * | 2013-12-10 | 2014-03-26 | 中国神华能源股份有限公司 | Liquid level measuring device and method for absorption tower |
| CN108479364A (en) * | 2018-05-04 | 2018-09-04 | 中国神华能源股份有限公司 | Drum gun turret pH value measuring system and bubble tower desulphurization system |
| CN111911812B (en) * | 2020-07-23 | 2022-07-26 | 深圳市祺鑫环保科技有限公司 | Liquid transfer system and anti-overflow control method thereof |
| CN114452788B (en) * | 2022-03-17 | 2023-02-14 | 江苏桂铭机械有限公司 | Desulfurization equipment with tail end detects |
-
2007
- 2007-08-17 CN CNB200710120403XA patent/CN100518901C/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 简易湿法石灰/石灰石烟气脱硫工艺设计及实践. 王伟能.能源环境保护，第18卷第1期. 2004 |
| 简易湿法石灰/石灰石烟气脱硫工艺设计及实践. 王伟能.能源环境保护，第18卷第1期. 2004 * |
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| Publication number | Publication date |
|---|---|
| CN101164671A (en) | 2008-04-23 |
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