CN201669043U - Ammonia flue gas desulfurization device - Google Patents

Ammonia flue gas desulfurization device Download PDF

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Publication number
CN201669043U
CN201669043U CN2009202138650U CN200920213865U CN201669043U CN 201669043 U CN201669043 U CN 201669043U CN 2009202138650 U CN2009202138650 U CN 2009202138650U CN 200920213865 U CN200920213865 U CN 200920213865U CN 201669043 U CN201669043 U CN 201669043U
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flue gas
tower
washing
ammonia
desulfurizing
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CN2009202138650U
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娄爱娟
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Lou Aijuan
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Individual
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Abstract

The utility model relates to an ammonia flue gas desulfurization device comprising a washing tower and a desulfurizing tower, wherein a flue gas outlet of the washing tower is positioned at the top, and a flue gas outlet of the desulfurizing tower is also positioned at the top; the lower part of the desulfurizing tower is provided with an oxidization pond, and the upper part thereof is provided with an absorbing section; the oxidization pond is used for containing absorbing liquid; the ammonia flue gas desulfurization device is characterized in that the flue gas outlet of the washing tower is connected with a flue gas inlet of the desulfurizing tower by a flue gas pipeline, the lower part of the desulfurizing tower is connected with the upper part of the washing tower by an absorbing liquid output pump, and the ammonium sulfate concentricity of the absorbing liquid is 5-45%; the ammonia flue gas desulfurization device further comprises a washing circulation tank communicated with the washing tower, the lower part of the washing circulation tank is communicated with the upper part of the washing tower by a washing circulation pump, and the washing liquid contained in the washing circulation tank is ammonium sulfate seriflux containing ammonium sulfate solid. The ammonia flue gas desulfurization device has benefits of being capable of effectively controlling the escape of aerosol and ammonia, being safer and more reliable for the running and control of the whole purification treatment system.

Description

Ammonia type flue gas desulfurizing apparatus
Technical field
The utility model relates to a kind of ammonia type flue gas desulfurizing apparatus, and relating in particular to ammonia is that raw material reclaims the smoke eliminator that oxysulfide is produced thiamine fertilizer from flue gas, belongs to electric power, metallurgy, environmental protection and chemical technology field.
Background technology
The acidic gaseous harmful substance that contains in the flue gas, SO especially wherein 2It is the main source that forms acid rain.As everyone knows, a kind of way that solves the acid rain pollution is exactly flue gas desulfurization.Employing ammonia is raw material, and desulfurization product is an ammonium sulfate, is the very high chemical fertilizer of a kind of fertilizer efficiency, and its unit nitrogenous fertilizer is imitated and is higher than urea, and element sulphur wherein also is the nutrient of crop growth necessity.
But the practical challenges that existing ammonia-process desulfurization technique faces jointly is exactly an aerosol.Aerosol is that the particle diameter that exists in the flue gas is less than 1 micron, even less than 0.1 micron, the ultrafine dust that is called sub-micron, its total concentration in flue gas may be very low, but it can cause the plume of smoke evacuation dense, and hangover is very long, even beyond several kilometers, had a strong impact on the visual appearance of smoke evacuation, severe patient has caused new secondary pollution.
Aerosol comprises the weak acid and weak base ammonium salt, refers in particular to ammonium bisulfite, and highly acid ammonium salt, such as the sulfur trioxide of association in the flue gas, and the result that hydrogen chloride, hydrogen fluoride and nitrogen dioxide etc. and ammonia react in gas phase.Be not resolvent under the strong acid weak base salt general condition.At present, the aerosol in the ammonia process purification process mainly is this class highly acid aerosol.Existing ammonia type flue gas desulfurizing technology is not almost at such aerocolloidal way, even the faintly acid aerosol, most ammonia process purification techniques all are easy in actual applications occur and are difficult to solve.
Therefore, if do not address the above problem well, the practical application and the popularization of ammonia type flue gas desulfurizing technology will be limited to a great extent.
Summary of the invention
The purpose of this utility model is to disclose a kind of novel ammonia type flue gas desulfurizing apparatus, to solve the serious aerosol problem that exists in the prior art, can also guarantee more effectively to control the escape loss and the higher ammonia prepared using efficient of ammonia simultaneously.
For achieving the above object, the utility model has designed a kind of ammonia type flue gas desulfurizing apparatus, it comprises scrubbing tower and desulfurizing tower, the exhanst gas outlet of described scrubbing tower is positioned at the top of scrubbing tower, the exhanst gas outlet of desulfurizing tower also is positioned at the top of desulfurizing tower, desulfurizing tower is divided into two sections, its underpart is an oxidation pond, and top is absorber portion, described oxidation pond splendid attire absorption liquid, scrubbing tower is positioned at the flue gas stream upstream of desulfurizing tower, the exhanst gas outlet of scrubbing tower is connected by flue with the gas approach of desulfurizing tower, desulfurizing tower bottom, i.e. oxidation pond, be connected with described scrubbing tower top by the absorption liquid rear pump, and the ammonium sulfate concentrations of described absorption liquid is 5~45%.Like this, scrubbing tower has the effect that the highly acid gas of association in the flue gas is removed in washing, these highly acid gases have been cut off in follow-up desulfurizing tower, the concrete chance that in absorber portion, contacts with ammonia, thereby thoroughly avoided the aerocolloidal appearance of highly acid, especially absorption liquid can not reach the saturated concentration 46% of sulphur ammonium, thereby absorption process of making (ammonia in the absorption liquid and sulfur dioxide in flue gas reaction generate ammonium sulfite and be dissolved in absorption liquid) and oxidizing process (is ammonium sulfate with sulfite oxidation) are simplified greatly, and operation stability also can be guaranteed better.
Ammonia type flue gas desulfurizing apparatus of the present utility model, its feature also is, it also comprises the cycles of washing groove that is connected with described scrubbing tower, cycles of washing groove bottom is connected with described scrubbing tower top by cleaning circulation pump, the cleaning solution of described cycles of washing groove splendid attire is the sulphur ammonium slurries that contain ammonium sulfate solids, described scrubbing tower can be that housing links to each other with the cycles of washing groove, and promptly one turns to a container or tower, also can be two independent container and towers that are provided with that link to each other by pipeline.Like this, constituted the cycles of washing loop, scrubbing tower can also play the evaporation concentration effect for absorption liquid, makes the absorption liquid that comes from desulfurizing tower become oversaturated slurries scrubbing tower, and in the cycles of washing groove crystalline growth.
Further, the bottom of described cycles of washing groove is connected with the slurries rear pump, the slurries delivery pump connects the one-level cyclone again, the underflow opening of described one-level cyclone connects the growing the grain groove, overfall connects described cycles of washing groove again by pipeline, and the sulphur ammonium slurries of described growing the grain groove splendid attire, its ammonium sulfate concentrations is 55~65%.Like this, can be controlled in the cycles of washing groove sulphur ammonium solid concentration about 5%, and the sulphur ammonium solid concentration in the growing the grain groove helps the growth of crystal in 10~20% scopes.
Also have, described oxidation pond contains the air bubbler, the air or oxygen that provides sulfite oxidation to need, described air bubbler can be the pipe network form that has antipriming pipe, also can be the mechanical agitation distributing, and described absorber portion contains the absorption spray thrower and disperses absorption liquid in order to uniform and atomizing, so that good gas liquid contacting efficiency to be provided, and above described absorption spray thrower, be provided with the absorption demister,, eliminate secondary pollution to remove the absorption liquid drop that flue gas is carried secretly.
Further, in the ammonia type flue gas desulfurizing apparatus of the present utility model, be provided with the wash spray device in the described scrubbing tower, disperse the washing slurries in order to uniform and atomizing, make the highly acid material in its colleges and universities' absorption flue gas, and above described wash spray device, be provided with the washing demister, and described washing demister has two-layerly, and interlayer is provided with the absorption liquid spray thrower that is connected with described absorption liquid rear pump.Like this, can make the cleaning solution drop of carrying secretly in the flue gas be able to effective separation, prevent that it is back in the desulfurizing tower by being carried secretly, make in the oxidation pond ammonium sulfate concentrations in the absorption liquid minimum, reduce the phenomenon that scabs in the desulfurizing tower, and can improve oxidation efficiency in the oxidation pond, improve the operational reliability of desulfurizing tower.
And, also be provided with flue gas distributor in the scrubbing tower, between gas approach and wash spray device,, prevent problems such as flue gas short circuit so that evenly distribute after making flue gas enter scrubbing tower, guarantee and the cleaning solution even contact, obtain the detersive efficiency of expection.
Also have, described wash spray device has two groups, is connected with two cycles of washing pipelines with two cleaning circulation pump respectively, guarantees the reliability of cleaning solution supply and the security of scrubbing tower operation.
Further, in the ammonia type flue gas desulfurizing apparatus of the present utility model, described oxidation pond is provided with the adapter of adding raw material ammonia, with the pH value of guaranteeing desulfuration efficiency and absorption liquid between 5.5~6.0, described growing the grain groove is provided with the adapter of adding raw material ammonia, with in and the highly acid material that absorbs of scrubbing tower, and reduce corrosivity.
And, described growing the grain groove also connects sulphur ammonium slurries rear pump, and connect second cyclone successively again, liquid-solid separation equipment, drying equipment and packaging facilities, and the clear liquid pipeline of second cyclone and the mother liquor pipeline of centrifuge all are communicated with described sink, and the ammonium sulfate product of the satisfied national thiamine fertilizer standard that acquisition can commodity selling makes not waste discharge of whole system simultaneously.
In addition, the exhanst gas outlet of the desulfurizing tower in the ammonia type flue gas desulfurizing apparatus of the present utility model directly is connected with in line chimney, and the height of described in line chimney is between 30~100m, like this, with regard to not needing former chimney is carried out anticorrosion, reduce investment outlay, be particularly suitable for the transformation of old factory.
Operation principle of the present utility model is such:
Contain highly acid sulfur trioxide, hydrogen chloride and nitrogen dioxide, with faintly acid sulfur dioxide and dirt, and the higher former flue gas of temperature at first enters scrubbing tower, contact with the cleaning solution that sprays in the scrubbing tower, lowered the temperature by chilling, and dirt and highly acid gas are washed and become the washing flue gas, enter desulfurizing tower again.The washing flue gas that enters desulfurizing tower contacts with decontaminating liquid, absorbs weakly acidic sulfur dioxide, becomes the purification flue gas.
In scrubbing tower, flue gas passes through flue gas distributor successively, wash spray device and washing demister; In desulfurizing tower, flue gas purifies spray thrower and purifies demister successively by flue gas distributor.
Extract the ammonium sulfate dilute slurry from the cycles of washing groove, after concentrating through cyclone, obtain ammonium sulfate underflow liquid, be stored in the growing the grain groove, allow the ammonia sulfate crystal continued growth, improve the quality, again by follow-up solid-liquid separating equipment extraction ammonium sulfate solids.From the liquid that solid-liquid separating equipment is returned, be called mother liquor and be back in the cycles of washing groove.
Compare with the prior art scheme, adopt the beneficial effect of ammonia type flue gas desulfurizing apparatus of the present utility model to be, two main processes that take place in the flue gas, be that humidifying cooling (following concentrating of sulphur ammonium circulating absorption solution simultaneously) has been realized effective decoupling zero with flue gas desulfurization, especially determine aerosol to form and two processes of the escaping of ammonia have also realized effective decoupling zero, made two difficult problems that exist in the conventional art be able to respectively and solution efficiently.
Description of drawings
Fig. 1 is the ammonia type flue gas desulfurizing apparatus schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing ammonia type flue gas desulfurizing apparatus of the present utility model is described in further detail.
Referring to accompanying drawing 1, a kind of ammonia type flue gas desulfurizing apparatus, comprise scrubbing tower 5 and desulfurizing tower 15, the exhanst gas outlet 55 of described scrubbing tower 5 is positioned at the top of scrubbing tower 5, the exhanst gas outlet 156 of desulfurizing tower 15 also is positioned at the top of desulfurizing tower 15, the desulfurizing tower bottom is an oxidation pond 1501, top is absorber portion 1502, described oxidation pond 1501 splendid attire absorption liquids 151, the exhanst gas outlet 55 of described scrubbing tower 5 and the gas approach of described desulfurizing tower 15 155 are connected by flue, described desulfurizing tower 15 bottoms are connected with described scrubbing tower 5 tops by absorption liquid rear pump 9, and the ammonium sulfate concentrations of described absorption liquid 151 is 15%.
Aforesaid ammonia type flue gas desulfurizing apparatus, also comprise the cycles of washing groove 6 that is connected with described scrubbing tower 5, described cycles of washing groove 6 bottoms are connected with described scrubbing tower 5 tops by cleaning circulation pump 8, and the cleaning solution 61 of described cycles of washing groove 6 splendid attires is for containing the sulphur ammonium slurries of ammonium sulfate solids;
Cycles of washing groove 6 bottoms are connected with slurries rear pump 7, described slurries rear pump 7 connects one-level cyclone 4 again, the underflow opening of described one-level cyclone 4 connects growing the grain groove 3, overfall connects described cycles of washing groove 6 again by pipeline 27, and the sulphur ammonium slurries 31 of described growing the grain groove 3 splendid attires, its ammonium sulfate concentrations is 60%;
Described oxidation pond 1501 contains air bubbler 157, and described absorber portion 1502 contains absorption spray thrower 153, and described absorption spray thrower 153 tops are provided with and absorb demister 154.
In addition, be provided with wash spray device 52 in the scrubbing tower 5 of aforesaid ammonia type flue gas desulfurizing apparatus, above described wash spray device 52, be provided with washing demister 53, and described washing demister 53 has two-layer, and interlayer is provided with absorption liquid 151 spray throwers that are connected with described absorption liquid rear pump 9;
Also be provided with flue gas distributor 51 in the described scrubbing tower 5, between gas approach 54 and wash spray device 52, described wash spray device 52 has two groups, is connected with two cycles of washing pipelines with two cleaning circulation pump 8 respectively;
Described growing the grain groove 3 is provided with the adapter of adding raw material ammonia 2, also be provided with the adapter of adding raw material ammonia 2 on the described oxidation pond 1501, described growing the grain groove 3 also connects sulphur ammonium slurries rear pump 18, and connect second cyclone 19 successively again, liquid-solid separation equipment 21, drying equipment 22 and packaging facilities 23, and the mother liquor pipeline 26 of the clear liquid pipeline 25 of second cyclone 19 and centrifuge 21 all is communicated with described sink 6.
Further, aforesaid ammonia type flue gas desulfurizing apparatus, the exhanst gas outlet 156 of desulfurizing tower 15 directly is connected with in line chimney 28, and the height of described in line chimney 28 is at 65m.

Claims (10)

1. ammonia type flue gas desulfurizing apparatus, comprise scrubbing tower (5) and desulfurizing tower (15), the exhanst gas outlet (55) of described scrubbing tower (5) is positioned at the top of described scrubbing tower (5), the exhanst gas outlet (156) of described desulfurizing tower (15) also is positioned at the top of described desulfurizing tower (15), the bottom is oxidation pond (1501), top is absorber portion (1502), described oxidation pond (1501) splendid attire absorption liquid (151), it is characterized in that, the exhanst gas outlet (55) of described scrubbing tower (5) is connected by flue with the gas approach (155) of described desulfurizing tower (15), and described desulfurizing tower (15) bottom is connected with described scrubbing tower (5) top by absorption liquid rear pump (9).
2. ammonia type flue gas desulfurizing apparatus according to claim 1, it is characterized in that, also comprise the cycles of washing groove (6) that is connected with described scrubbing tower (5), described cycles of washing groove (6) bottom is connected with described scrubbing tower (5) top by cleaning circulation pump (8).
3. ammonia type flue gas desulfurizing apparatus according to claim 2, it is characterized in that, described cycles of washing groove (6) bottom is connected with slurries rear pump (7), described slurries rear pump (7) connects one-level cyclone (4) again, the underflow opening of described one-level cyclone (4) connects growing the grain groove (3), and overfall connects described cycles of washing groove (6) again by pipeline (27).
4. ammonia type flue gas desulfurizing apparatus according to claim 1, it is characterized in that, described oxidation pond (1501) contains air bubbler (157), and described absorber portion (1502) contains absorption spray thrower (153), and described absorption spray thrower (153) top is provided with and absorbs demister (154).
5. ammonia type flue gas desulfurizing apparatus according to claim 1, it is characterized in that, be provided with wash spray device (52) in the described scrubbing tower (5), be provided with washing demister (53) in described wash spray device (52) top, and described washing demister (53) has two-layer, and interlayer is provided with absorption liquid (151) spray thrower that is connected with described absorption liquid rear pump (9).
6. ammonia type flue gas desulfurizing apparatus according to claim 5 is characterized in that, also is provided with flue gas distributor (51) in the described scrubbing tower (5), is positioned between gas approach (54) and the wash spray device (52).
7. ammonia type flue gas desulfurizing apparatus according to claim 5 is characterized in that, described wash spray device (52) has two groups, is connected with two cycles of washing pipelines with two cleaning circulation pump (8) respectively.
8. ammonia type flue gas desulfurizing apparatus according to claim 3 is characterized in that, described growing the grain groove (3) is provided with the adapter of adding raw material ammonia (2), and described oxidation pond (1501) is provided with the adapter of adding raw material ammonia (2).
9. ammonia type flue gas desulfurizing apparatus according to claim 3, it is characterized in that, described growing the grain groove (3) also connects sulphur ammonium slurries rear pumps (18), and connect second cyclone (19) successively again, liquid-solid separation equipment (21), drying equipment (22) and packaging facilities (23), and the mother liquor pipeline (26) of the clear liquid pipeline (25) of second cyclone (19) and centrifuge (21) all is communicated with described sink (6).
10. according to each described ammonia type flue gas desulfurizing apparatus of claim 1 to 9, it is characterized in that the exhanst gas outlet (156) of described desulfurizing tower (15) directly is connected with in line chimney (28), and the height of described in line chimney (28) is between 30~100m.
CN2009202138650U 2009-11-19 2009-11-19 Ammonia flue gas desulfurization device Expired - Lifetime CN201669043U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102228777A (en) * 2011-05-23 2011-11-02 潍坊恒安散热器集团有限公司 Double-oxidation ammonia desulfurization process and device
CN102527210A (en) * 2010-12-30 2012-07-04 中钢集团工程设计研究院有限公司 Sintering flue gas ammonia desulfurization system and process
CN102580475A (en) * 2012-02-17 2012-07-18 宣化钢铁集团有限责任公司 Method for recycling sulfuric acid tail gas in gas purification AS desulfurization process
CN102850092A (en) * 2011-08-31 2013-01-02 上海克硫环保科技股份有限公司 Technology for producing ammonium sulfate fertilizer through desulfurizing smoke by ammonia process, and apparatus thereof
CN110180369A (en) * 2019-04-16 2019-08-30 湖北双环科技股份有限公司 Ammonia type flue gas desulfurizing integral treatment method
US10399033B2 (en) 2017-05-25 2019-09-03 Jiangnan Environmental Protection Group Inc. Ammonia-based desulfurization process and apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102527210A (en) * 2010-12-30 2012-07-04 中钢集团工程设计研究院有限公司 Sintering flue gas ammonia desulfurization system and process
CN102527210B (en) * 2010-12-30 2015-01-14 中钢集团工程设计研究院有限公司 Sintering flue gas ammonia desulfurization system and process
CN102228777A (en) * 2011-05-23 2011-11-02 潍坊恒安散热器集团有限公司 Double-oxidation ammonia desulfurization process and device
CN102228777B (en) * 2011-05-23 2013-04-10 潍坊恒安散热器集团有限公司 Double-oxidation ammonia desulfurization process and device
CN102850092A (en) * 2011-08-31 2013-01-02 上海克硫环保科技股份有限公司 Technology for producing ammonium sulfate fertilizer through desulfurizing smoke by ammonia process, and apparatus thereof
CN102580475A (en) * 2012-02-17 2012-07-18 宣化钢铁集团有限责任公司 Method for recycling sulfuric acid tail gas in gas purification AS desulfurization process
US10399033B2 (en) 2017-05-25 2019-09-03 Jiangnan Environmental Protection Group Inc. Ammonia-based desulfurization process and apparatus
US10406478B2 (en) 2017-05-25 2019-09-10 Jiangnan Environmental Protection Group Inc. Ammonia-based desulfurization process and apparatus
US10413865B2 (en) 2017-05-25 2019-09-17 Jiangnan Enviromental Protection Group Inc. Ammonia-based desulfurization process and apparatus
US10561982B2 (en) 2017-05-25 2020-02-18 Jiangnan Environmental Protection Group Inc. Ammonia-based desulfurization process and apparatus
CN110180369A (en) * 2019-04-16 2019-08-30 湖北双环科技股份有限公司 Ammonia type flue gas desulfurizing integral treatment method

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Owner name: SHENCHUAN ENVIRONMENT PROTECTION SCIENCE AND TECHN

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Patentee before: Lou Aijuan

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Address after: Room 803, room 36, No. 1, Bi Quan Road, Minhang District, Shanghai

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Granted publication date: 20101215