CN102921283A - Wet flue gas desulfurization device - Google Patents
Wet flue gas desulfurization device Download PDFInfo
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- CN102921283A CN102921283A CN 201210496010 CN201210496010A CN102921283A CN 102921283 A CN102921283 A CN 102921283A CN 201210496010 CN201210496010 CN 201210496010 CN 201210496010 A CN201210496010 A CN 201210496010A CN 102921283 A CN102921283 A CN 102921283A
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Abstract
The invention discloses a wet flue gas desulfurization device comprising a desulfurization tower, a wet chimney and a dry chimney, wherein a wet flue gas outlet is formed on the top of the desulfurization tower; a wet flue gas inlet is formed on the lower part of the wet chimney; a clean flue gas outlet is formed on the upper part of the wet chimney; the wet flue gas outlet of the desulfurization tower is communicated with the wet flue gas inlet through a flue; the dry chimney is communicated with the wet chimney through a three-way pipe; and two branch pipes of the three-way pipe are internally provided with baffle doors. The wet flue gas desulfurization device is adopted to perform flue gas desulfurization, thus working condition is stable, the entrainment of flue gas on liquid droplets is reduced, and the overhaul and maintenance work amounts of a manufacturer are also greatly reduced while improving the discharge of pollutants at the flue gas outlet. The wet flue gas desulfurization device is simple in structure and convenient to implement.
Description
Technical field
The present invention relates to wet fuel gas desulfurizing technology, particularly a kind of wet flue gas desulfurizer.
Background technology
Flue gas desulfurization technique mainly contains wet method, dry method and semidry method.The general flow of wet process of FGD is former flue gas-deduster-desulfurizing tower-clean fume emission.This technology relies on its high desulfuration efficiency and stability, is most widely used.But, wet desulfurization system is in operation and also has some problems, as chimney breast flue gas drop occurs and carry phenomenon (refer to that the drop in the flue gas is brought in the atmospheric environment by flue gas at chimney breast, the large drop that some of them have little time to spread will drop to ground) etc. secretly.
The immediate cause that drop forms in the flue gas is to carry the drop of not removed by demister in the flue gas, and remote cause is that the steam in the flue gas is because temperature drop condenses into water droplet.The factor that causes temperature drop has a lot: 1, flue gas is in the uphill process of chimney, and pressure decreased makes flue gas cool-down after the adiabatic expansion: the chimney lining contact heat-exchanging that the flue gas that 2, temperature is higher and temperature are lower, cause outside flue-gas temperature to descend; 3, owing to the existence of thermograde, the flue gas at smoke discharging pipe middle part and the low-temperature flue gas heat exchange in the outside cause the middle part flue-gas temperature to descend; Be down to the wet flue gas saturation temperature when following when flue-gas temperature, the steam in the flue gas will condense into water droplet; And when flue-gas temperature is higher than the saturation temperature of wet flue gas, drop in the flue gas can evaporate on the one hand and reduce, on the other hand because contact, collision between the drop, can merge and become large or be broken into more droplet, drop is in inner wall of stack condensation and constantly increase, and is dirty along barrel behind the arrival constant weight, when flue gas flow rate is too high in the chimney, the drop that the condensation of inner wall of stack face goes out will be carried secretly by flue gas stream again, forms so-called drop reentrainment.
The mode of the wet flue gas discharging atmosphere after the at present desulfurization mainly contains two kinds.The one, return the original dried chimney of mixed earth by flue, namely do the technique that wet chimney shares.The 2nd, directly enter atmosphere by the wet chimney in desulfurizing tower top, i.e. the technique of cigarette tower unification.
The problem that the first technique exists is: the flue gas after the wet desulphurization is not only carried a large amount of steam secretly, also with partial desulfurization accessory substance and strong corrosive material (such as sulfide, chloride, fluoride etc.), this wet flue gas is high to requirement for anticorrosion in the mixed earth chimney.Carry out the measures such as anticorrosion main employing light ceramics glass foamed bricks, liner steel alloy, titanium lined plywood to doing wet concentric stack both at home and abroad at present.From applicable cases, anti-corrosion material is comparatively expensive on the one hand, and construction cost is high, chimney is carried out high-quality corrosion-resistant advanced technology also only have several companies to grasp.Owing to reasons such as product quality, construction quality, abominable operating mode service condition and later maintenance maintenances, its anticorrosive coat is often destroyed, does not reach designing requirement and service life on the other hand, and maintenance difficulties and maintenance cost are all higher.
The second process using is in the method for the wet chimney of desulfurizing tower top construction, do the Anticorrosion that wet chimney shares the technique existence although can solve, but sometimes because the demist poor effect, in the lower situation of atmosphere outside temperature, the phenomenon that chimney rains appears.
Summary of the invention
The purpose of this invention is to provide a kind of wet flue gas desulfurizer, can overcome the defective that flue gas entrained drip situation in the wet desulfurizing process causes seriously that the chimney anticorrosion technical difficulty is large and expense is high and misty rain easily occurs, and simple in structure, easily enforcement.
Technical purpose of the present invention is achieved by the following scheme:
A kind of wet flue gas desulfurizer, comprise desulfurizing tower, the desulfurizing tower middle and lower part arranges the former smoke inlet of I, the desulfurizing tower top arranges the wet flue gas outlet, also comprise I flue, II flue and the wet chimney and the dried chimney that are set up in parallel with desulfurizing tower, described II flue is the three-way pipeline that is made of I arm, II arm and III arm; Dried chimney bottom is provided with the former smoke inlet of II, and dried chimney top arranges the dry flue gas outlet; Wet chimney jambs is provided with the wet flue gas entrance, and wet chimney top is provided with clean exhanst gas outlet, and the wet flue gas entrance is near the bottom of wet chimney, and the outlet of the wet flue gas of desulfurizing tower is communicated with described wet flue gas entrance by the I flue; In addition, in the present invention program, the openend of I arm is communicated with the former smoke inlet of I, and the openend of II arm is communicated with the former smoke inlet of II, in I arm and the II arm all along self horizontally set baffle door.
Among the present invention, because wet chimney and desulfurizing tower are set up in parallel, the wet flue gas entrance is arranged on the wet chimney jambs, and near wet chimney bottom, because arranging of wet flue gas entrance highly is lower than arranging highly of wet flue gas outlet, cause wet flue gas from the desulfurizing tower top out after, must be by the flue of bending descending and enter in the wet chimney, in the process of row flue, the collision of flue gas and walling of flue, flow velocity descends, and the ability of carrying secretly of drop is obviously reduced, and can catch certain drop, meanwhile, drop temperature drop progressively in flue and wet chimney, be agglomerated to enough large after, thoroughly break away from flue gas and be adsorbed on the wet inner wall of stack, then descending along inner wall of stack and accumulate in wet chimney bottom, rather than carried secretly by flue gas and to chimney, to enter atmosphere or to form misty rain; In addition, because the wet flue gas entrance is near the bottom of wet chimney, under desulfurizing tower and wet chimney height one stable condition, this set can further increase flue length and gradient, prolong temperature drop and the setting time of drop in flue and wet chimney, reduce simultaneously flue gas to the ability of drop reentrainment, guarantee the effect that drop breaks away from from flue gas.
Based on this design, can set up the drop retracting device in the wet chimney, in order in time remove the drop of recovery, the setting of drop retracting device can be with reference to prior art.
In addition, because the present invention is provided with separately dried chimney, when the desulfurizing tower accident condition, close the baffle door in the I arm, open the baffle door in the II arm, pass into dry former flue gas from the III arm, former flue gas is directly via dried smoke stack emission, when desulfurizing tower normally moves, close the baffle door in the II arm, and the baffle door of opening in the I arm gets final product; Solve the dry flue gas wet flue gas and in same chimney, alternately discharged the corrosivity harm problem that chimney is brought.
Need to prove, as the substitute mode that is equal to of the present invention, two baffle doors are separately positioned on the former smoke inlet of I and II former smoke inlet place or its next door all can realize purpose of the present invention.
Adopt device of the present invention to carry out smoke-gas wet desulfurization, not only operating mode is comparatively stable, and can reduce flue gas carrying secretly drop, improve the exhanst gas outlet pollutant emission, can avoid reducing the misty rain phenomenon and produce, on the other hand, the maintenance of producer, safeguard that pressure also reduces greatly.
Among the present invention, wet chimney height can be with reference to routine techniques, and can not affect clean plume rise ability.
Preferably, described wet chimney is made by fiberglass.
Preferably, described wet chimney is made by carbon steel, and the madial wall of wet chimney is covered with glass flake.
Beneficial effect of the present invention:
Adopt device of the present invention to carry out smoke-gas wet desulfurization, not only operating mode is comparatively stable, and can reduce flue gas carrying secretly drop, improve the exhanst gas outlet pollutant emission, on the other hand, the maintenance of producer, safeguard that pressure also greatly reduces, the present invention is simple in structure, implement easily to be fit to very much promote the use of.
Description of drawings
Fig. 1 is structural representation of the present invention.
The specific embodiment
The wet flue gas desulfurizer of the present embodiment comprises that desulfurizing tower 1, I flue 4, II flue 6, wet chimney 3 and dried chimney 5, the II flues 6 are the three-way pipelines that are made of I arm 61, II arm 62 and III arm 63; The desulfurizing tower top is provided with wet flue gas outlet 11, and the desulfurizing tower bottom arranges the former smoke inlet 12 of I; Dried chimney bottom is provided with the former smoke inlet 51 of II, and dried chimney top arranges dry flue gas outlet 52; Wet chimney jambs is provided with wet flue gas entrance 31, and wet chimney top is provided with clean exhanst gas outlet 32, and wet flue gas entrance 31 is near the bottom of wet chimney 3, and the outlet 11 of the wet flue gas of desulfurizing tower is communicated with described wet flue gas entrance 31 by I flue 4; Arranging of wet flue gas entrance 31 highly is lower than arranging highly of wet flue gas outlet 11.
The openend of I arm 61 is communicated with the former smoke inlet 12 of I, and the openend of II arm 62 is communicated with the former smoke inlet 51 of II, in I arm and the II arm all along self horizontally set baffle door 7.
When desulfurizing tower normally moves, close the baffle door in the II arm, and open baffle door in the I arm, the up desulfurization after entering desulfurizing tower behind III arm, the I arm of former smoke gas flow, flue gas after the desulfurization is processed through demister, obtain wet flue gas, wet flue gas enters in the wet chimney via the flue of bending again, and the clean exhanst gas outlet from wet chimney top enters atmosphere at last.When the desulfurizing tower fault, close the baffle door in the I arm, open the baffle door in the II arm, dry former flue gas gets final product via dried smoke stack emission.In the present embodiment, wet chimney is made by fiberglass.
Certainly, as another embodiment of the present invention, described wet chimney can also be made by carbon steel, and is covered with glass flake at the madial wall of wet chimney.
Need at last explanation; above embodiment only is used for technical scheme of the present invention is described and unrestricted; although with reference to preferred embodiment technical scheme of the present invention is had been described in detail; those skilled in the art are to be understood that; can make amendment or be equal to replacement technical scheme of the present invention; and not breaking away from aim of the present invention and scope, it all should be encompassed in the middle of protection scope of the present invention.
Claims (3)
1. wet flue gas desulfurizer, comprise desulfurizing tower (1), the desulfurizing tower middle and lower part arranges the former smoke inlet of I (12), the desulfurizing tower top arranges wet flue gas outlet (11), it is characterized in that: also comprise I flue (4), II flue (6) and the wet chimney (3) and the dried chimney (5) that are set up in parallel with desulfurizing tower, described II flue is the three-way pipeline that is made of I arm (61), II arm (62) and III arm (63);
Dried chimney (5) bottom is provided with the former smoke inlet of II (51), and dried chimney top arranges dry flue gas outlet (52);
The sidewall of wet chimney (3) is provided with wet flue gas entrance (31), wet chimney top is provided with clean exhanst gas outlet (32), wet flue gas entrance (31) is near the bottom of wet chimney, and the wet flue gas of desulfurizing tower outlet (11) is communicated with described wet flue gas entrance (31) by I flue (4);
The openend of I arm (61) is communicated with the former smoke inlet of I (12), the openend of II arm (62) is communicated with the former smoke inlet of II (51), in the body of I arm (61) and II arm (62) all along self horizontally set baffle door (7).
2. wet flue gas desulfurizer according to claim 1, it is characterized in that: described wet chimney is made by fiberglass.
3. wet flue gas desulfurizer according to claim 1, it is characterized in that: described wet chimney is made by carbon steel, and the madial wall of wet chimney is covered with glass flake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210496010 CN102921283A (en) | 2012-11-29 | 2012-11-29 | Wet flue gas desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210496010 CN102921283A (en) | 2012-11-29 | 2012-11-29 | Wet flue gas desulfurization device |
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| Publication Number | Publication Date |
|---|---|
| CN102921283A true CN102921283A (en) | 2013-02-13 |
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| CN 201210496010 Pending CN102921283A (en) | 2012-11-29 | 2012-11-29 | Wet flue gas desulfurization device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105477896A (en) * | 2015-12-23 | 2016-04-13 | 烟台龙源电力技术股份有限公司 | Wet process desulphurization demisting device and wet process desulphurization device |
| CN105750254A (en) * | 2016-04-15 | 2016-07-13 | 佛山赛因迪环保科技有限公司 | Method and apparatus for preventing dust accumulation of flue gas inlet duct of adsorption tower |
-
2012
- 2012-11-29 CN CN 201210496010 patent/CN102921283A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105477896A (en) * | 2015-12-23 | 2016-04-13 | 烟台龙源电力技术股份有限公司 | Wet process desulphurization demisting device and wet process desulphurization device |
| CN105750254A (en) * | 2016-04-15 | 2016-07-13 | 佛山赛因迪环保科技有限公司 | Method and apparatus for preventing dust accumulation of flue gas inlet duct of adsorption tower |
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Application publication date: 20130213 |