CN107569983B - Wet flue gas desulfurization equipment - Google Patents
Wet flue gas desulfurization equipment Download PDFInfo
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- CN107569983B CN107569983B CN201710670363.XA CN201710670363A CN107569983B CN 107569983 B CN107569983 B CN 107569983B CN 201710670363 A CN201710670363 A CN 201710670363A CN 107569983 B CN107569983 B CN 107569983B
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Abstract
The invention provides a wet flue gas desulfurization device, which is characterized in that a reaction tank and a reaction cylinder are arranged, primary treatment is respectively carried out in the reaction tank, secondary treatment is carried out in the reaction cylinder, the reaction time is prolonged compared with a single tower at the same height, the flue gas and alkali liquor are uniformly mixed and atomized, the reaction is sufficient, and the occupied space is small; the flue gas inlet on the reaction tank and the cross section of the reaction tank are arranged in the direction approximately parallel to the tangent line, the flue gas rotates downwards along the inner wall in the reaction tank, and the centrifugal force generated by the cyclone of the flue gas can remove a part of dust; the nozzle and the cross section of the reaction tank are arranged in the direction approximately parallel to the tangent line and are arranged according to the flow direction of the flue gas, so that the fluency of the flue gas in the reaction tank is maintained, the mixing and atomizing effect between the flue gas and the alkali liquor is enhanced, and the reaction is more sufficient; set up whirl board and nozzle in the reaction barrel, make the flue gas that gets into the reaction barrel more even, the mass transfer effect is better, has further strengthened the reaction effect.
Description
Technical Field
The invention relates to flue gas desulfurization equipment, in particular to wet flue gas desulfurization equipment.
Background
At present, with the increasing national requirements for environmental protection and the increasing national requirements for pollution discharge enterprises, the emission of SO2 inevitably becomes one of the supervision important points. The processing mode of the SO2 is mainly divided into three methods, namely a dry method, a semi-dry method and a wet method, wherein the dry method and the semi-dry method have low efficiency and certain limitation, SO that the wet desulfurization becomes the main development direction of the existing desulfurization, and the form of the wet desulfurization absorption tower directly influences the desulfurization effect.
The absorption towers for removing SO2 mainly comprise a spray tower, a liquid column tower, a bubble tower, a sieve plate tower, a rotational flow plate tower, a Venturi scrubber and the like, and the absorption towers have advantages and disadvantages according to different parameters of flue gas and different selected desulfurization modes. The common characteristics are that in order to ensure sufficient reaction time and achieve better desulfurization effect, the tower body is generally designed to be higher, the occupied space is larger, and the dust removal effect is not too large.
Disclosure of Invention
In view of the above, the invention provides a wet flue gas desulfurization device which has the advantages of uniform mixing and atomization between flue gas and alkali liquor, full reaction and small occupied space.
The technical scheme of the invention is realized as follows: the invention provides a wet flue gas desulfurization device which comprises a reaction tank, a reaction barrel, a flue gas inlet, a drain outlet and a plurality of nozzles, wherein the reaction tank is respectively provided with the flue gas inlet and the drain outlet, the upper part and the lower part of the reaction barrel are provided with openings, the reaction barrel penetrates through a top cover of the reaction tank and is sealed with the top cover, and the reaction barrel and the reaction tank are respectively provided with the nozzles.
On the basis of the technical scheme, the reactor is preferred to further comprise a cyclone plate which is nested in the reaction cylinder body and is positioned below the nozzle in the reaction cylinder body. Further preferably, the reaction device also comprises a flue and a demister, wherein the flue is communicated with an opening at the upper part of the reaction cylinder, and the demister is nested in the flue. Preferably, the flue comprises an expanded diameter pipe section, a large diameter pipe section and a reduced diameter pipe section, wherein two ends of the expanded diameter pipe section are respectively communicated with the upper opening of the reaction cylinder body and the large diameter pipe section, one end of the reduced diameter pipe section is communicated with the large diameter pipe section, the diameters of the expanded diameter pipe section and the reduced diameter pipe section are gradually increased as the expanded diameter pipe section and the reduced diameter pipe section are closer to the large diameter pipe section, and the demister is nested in the large diameter pipe section. Still further preferably, the large-diameter straight pipe section is provided with an electric dust removal device.
On the basis of the technical scheme, preferably, the cross section of the inner wall of the reaction tank is circular, and the air inlet direction of the flue gas inlet and the horizontal plane form an included angle of 10-30 degrees and an included angle of 0-20 degrees with the tangent line of the joint of the cross section of the inner wall of the reaction tank. Further preferably, the flue gas inlet is arranged above the nozzles in the reaction tank, and the included angle between the liquid spraying direction of the nozzles in the reaction tank and the tangent line of the joint of the cross section of the inner wall of the reaction tank is 0-20 degrees. Further preferably, the nozzles are arranged in the flow direction of the flue gas.
On the basis of the technical scheme, preferably, the sewage draining outlet is arranged on the side wall of the reaction tank and is close to the bottom, and a DN300 sewage draining pipe is adopted.
Compared with the prior art, the wet flue gas desulfurization equipment has the following beneficial effects:
(1) by arranging the reaction tank and the reaction barrel, primary treatment is respectively carried out in the reaction tank, secondary treatment is carried out in the reaction barrel, the reaction time is prolonged compared with a single tower at the same height, the flue gas and the alkali liquor are uniformly mixed and atomized, the reaction is sufficient, and the occupied space is small;
(2) the flue gas inlet on the reaction tank and the cross section of the reaction tank are arranged in the direction approximately parallel to the tangent line, the flue gas rotates downwards along the inner wall in the reaction tank, and the centrifugal force generated by the cyclone of the flue gas can remove a part of dust; the nozzle and the cross section of the reaction tank are arranged in the direction approximately parallel to the tangent line and are arranged according to the flow direction of the flue gas, so that the fluency of the flue gas in the reaction tank is maintained, the mixing and atomizing effect between the flue gas and the alkali liquor is enhanced, and the reaction is more sufficient;
(3) set up whirl board and nozzle in the reaction barrel, make the flue gas that gets into the reaction barrel more even, the mass transfer effect is better, has further strengthened the reaction effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic front sectional view of a wet flue gas desulfurization apparatus according to the present invention;
fig. 2 is a sectional view in the direction of fig. 1A-a.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1 and fig. 2, the wet flue gas desulfurization apparatus of the present invention comprises a reaction tank 1, a reaction cylinder 2, a flue gas inlet 3, a sewage outlet 4, and a plurality of nozzles 6.
The reaction tank 1 is respectively provided with a flue gas inlet 3 and a sewage outlet 4, and a nozzle 6 is arranged in the reaction tank 1. Thus, the acidic flue gas containing SO2 enters from the flue gas inlet 3 and reacts with the alkali liquor sprayed from the nozzle 6 in the reaction tank 1 to remove SO2 and part of the smoke dust, and the deposited reaction liquid and smoke dust mixed sludge is discharged through the sewage outlet 4. Specifically, drain 4 sets up on retort 1 lateral wall to near the bottom, adopt DN300 blow off pipe, be convenient for the complete evacuation liquid and the manual work drag for the sediment. Preferably, the cross section of the inner wall of the reaction tank 1 is circular, and the air inlet direction of the flue gas inlet 3 and the horizontal plane form an included angle of 10-30 degrees and an included angle of 0-20 degrees with the tangent line of the joint of the cross section of the inner wall of the reaction tank 1. An included angle of 10-30 degrees is designed between the gas inlet direction of the flue gas inlet 3 and the horizontal plane, SO that the acidic flue gas containing SO2 moves downwards; the included angle of a tangent line at the joint of the gas inlet direction of the flue gas inlet 3 and the cross section of the inner wall of the reaction tank 1 is designed to be 0-20 degrees, so that flue gas tangentially enters from the upper part of the reaction tank 1 and circularly moves downwards along the inner wall of the reaction tank 1, and the mixing and atomizing time between the flue gas and alkali liquor is prolonged; in addition, the centrifugal motion of the flue gas can also remove part of the dust. On this basis, flue gas inlet 3 sets up in 6 tops of nozzle in retort 1, and 6 hydrojet directions of nozzle and 1 inner wall cross section junction tangent line contained angle of retort 1 are 0 ~ 20 in retort 1. Specifically, the nozzle 6 is arranged in the flow direction of the flue gas. Therefore, the flue gas makes a circular motion downwards along the inner wall of the reaction tank 1, and meanwhile, alkali liquor sprayed out of the nozzles 6 which are evenly arranged on the inner wall of the reaction tank 1 in an approximately tangential direction is evenly mixed with the flue gas to react. The approximately tangential arrangement of the nozzles 6 is consistent with the flow of the flue gas, which ensures that the flow direction of the flue gas is not disturbed and reduces the system resistance.
The upper part and the lower part of the reaction cylinder body 2 are opened, the reaction cylinder body 2 penetrates through the top cover of the reaction tank 1 and is sealed with the top cover, and nozzles 6 are respectively arranged in the reaction cylinder body 2. Specifically, the distance between the lower end of the reaction cylinder 2 and the bottom of the reaction tank 1 is not less than 0.8 m. SO, the flue gas moves from bottom to top in reaction barrel 2, and with the alkali lye homogeneous mixing of nozzle 6 spun, carry out the secondary reaction, further the SO2 in the desorption flue gas has improved pollutant removal efficiency, compares with the single tower under the same height and has prolonged reaction time, and the mixing atomization is even, the reaction is abundant, occupation space is little between flue gas and the alkali lye. Preferably, the reactor also comprises a swirl plate 5 which is nested in the reaction cylinder 2 and is positioned below the nozzle 6 in the reaction cylinder 2. The residual gas after the secondary reaction is discharged through an opening at the upper part of the reaction cylinder 2, and in order to dehydrate the residual gas, the device also comprises a flue 7 and a demister 8, wherein the flue 7 is communicated with the opening at the upper part of the reaction cylinder 2, and the demister 8 is nested in the flue 7. In order to achieve a better dewatering effect, the diameter of the flue 7 of the demister 8 needs to be increased because the demister 8 having a slightly larger diameter can be provided. Specifically, the flue 7 comprises an expanded diameter pipe section 71, a large diameter pipe section 72 and a reduced diameter pipe section 73, wherein two ends of the expanded diameter pipe section 71 are respectively communicated with the upper opening of the reaction cylinder 2 and the large diameter pipe section 72, one end of the reduced diameter pipe section 73 is communicated with the large diameter pipe section 72, the diameters of the expanded diameter pipe section 71 and the reduced diameter pipe section 73 are gradually increased as the expanded diameter pipe section 71 and the reduced diameter pipe section 73 are closer to the large diameter pipe section 72, and the demister 8 is nested in the large diameter pipe section 72. In order to avoid dead angles and reduce the flow velocity of the flue gas, the diameter-expanding pipe section 71 is upwards expanded to the size of the outer diameter of the demister 8 at an angle of 45 degrees, and after the installation position of the demister 8 is reserved in the large-diameter pipe section 72, the diameter-reducing pipe section 73 is reduced to the flow cross section of the flue gas at the flow velocity of 15m/s at an angle of 45 degrees. The flue gas after deacidification and demisting enters the next system along the flue 7 or directly enters the exhaust funnel to be discharged. Preferably, the large-diameter straight pipe section 72 is partially provided with an electric dust collector, so that the large-diameter straight pipe section becomes desulfurization and dust removal integrated equipment.
Specifically, the design parameters of the wet flue gas desulfurization equipment are as follows: the tangential linear velocity of spiral flue gas in the reaction tank 1 is controlled to be 4-5 m/s, the rising velocity of the flue gas in the reaction cylinder 2 is controlled to be 2.5-3.5 m/s, and the reaction time of the flue gas is not less than 4 s.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The wet flue gas desulfurization equipment is characterized in that: the device comprises a reaction tank (1), a reaction barrel (2), a flue gas inlet (3), a drain outlet (4) and a plurality of nozzles (6), wherein the reaction tank (1) is respectively provided with the flue gas inlet (3) and the drain outlet (4), the upper part and the lower part of the reaction barrel (2) are provided with openings, the reaction barrel (2) penetrates through a top cover of the reaction tank (1) and is sealed with the top cover, and the nozzles (6) are respectively arranged in the reaction barrel (2) and the reaction tank (1); the gas inlet direction of the flue gas inlet (3) forms an included angle of 10-30 degrees with the horizontal plane, and the included angle of 0-20 degrees with the tangent line of the connecting part of the inner wall cross section of the reaction tank (1); flue gas inlet (3) set up nozzle (6) top in retort (1), and nozzle (6) hydrojet direction is 0 ~ 20 with retort (1) inner wall cross section junction tangent line contained angle in retort (1).
2. The wet flue gas desulfurization apparatus of claim 1, characterized in that: the device also comprises a rotational flow plate (5) which is nested in the reaction cylinder body (2) and is positioned below the nozzle (6) in the reaction cylinder body (2).
3. The wet flue gas desulfurization apparatus of claim 2, characterized in that: still include flue (7) and defroster (8), flue (7) and reaction barrel (2) upper portion opening intercommunication each other, and defroster (8) nestification sets up in flue (7).
4. The wet flue gas desulfurization apparatus of claim 3, characterized in that: the flue (7) comprises an expanding pipe section (71), a large-diameter straight pipe section (72) and a reducing pipe section (73), two ends of the expanding pipe section (71) are respectively communicated with an upper opening of the reaction cylinder body (2) and the large-diameter straight pipe section (72), one end of the reducing pipe section (73) is communicated with the large-diameter straight pipe section (72), the diameters of the expanding pipe section (71) and the reducing pipe section (73) are gradually increased as the expanding pipe section and the reducing pipe section (73) are closer to the large-diameter straight pipe section (72), and the demister (8) is nested in the large-diameter straight pipe section (72).
5. The wet flue gas desulfurization apparatus of claim 4, characterized in that: and the large-diameter straight pipe section (72) is provided with an electric dust removal device.
6. The wet flue gas desulfurization apparatus of claim 1, characterized in that: the cross section of the inner wall of the reaction tank (1) is circular.
7. The wet flue gas desulfurization apparatus of claim 6, characterized in that: the nozzle (6) is arranged in the flowing direction of the flue gas.
8. The wet flue gas desulfurization apparatus of claim 1, characterized in that: the sewage draining outlet (4) is arranged on the side wall of the reaction tank (1) and is close to the bottom, and a DN300 sewage draining pipe is adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710670363.XA CN107569983B (en) | 2017-08-08 | 2017-08-08 | Wet flue gas desulfurization equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710670363.XA CN107569983B (en) | 2017-08-08 | 2017-08-08 | Wet flue gas desulfurization equipment |
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| Publication Number | Publication Date |
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| CN107569983A CN107569983A (en) | 2018-01-12 |
| CN107569983B true CN107569983B (en) | 2020-04-03 |
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| CN201710670363.XA Expired - Fee Related CN107569983B (en) | 2017-08-08 | 2017-08-08 | Wet flue gas desulfurization equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114590858A (en) * | 2022-04-07 | 2022-06-07 | 山西钧泰源科技有限公司 | Novel vertical three-phase evaporative separator for desulfurization waste liquid |
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| CN105536410A (en) * | 2016-01-29 | 2016-05-04 | 孙立刚 | Dehydration device of wet-method smoke purifier |
| CN105879636A (en) * | 2016-04-19 | 2016-08-24 | 庄建中 | Wet desulfurization equipment for coal fired boiler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008035703A1 (en) * | 2006-09-19 | 2008-03-27 | Babcock-Hitachi Kabushiki Kaisha | Wet-type exhaust desulfurizing apparatus |
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2017
- 2017-08-08 CN CN201710670363.XA patent/CN107569983B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2476735Y (en) * | 2001-03-28 | 2002-02-13 | 何东飚 | Top de-smoke treating apparatus |
| CN2636098Y (en) * | 2003-08-07 | 2004-08-25 | 刘日民 | Double-cylinder type foam desulfurization dust removing integrated device |
| CN1593717A (en) * | 2004-07-15 | 2005-03-16 | 马鸿疆 | Rotational flow venturi tube plate desulfurization dedusting purification tower |
| CN2740271Y (en) * | 2004-10-14 | 2005-11-16 | 湘潭市南方高新技术研究院 | Cyclone dust-collecting and desulphurizing plant |
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| CN201894904U (en) * | 2010-06-13 | 2011-07-13 | 贾玉德 | Dual-cylinder rotational-flow bubbling dust removal and desulfurization gas cleaning device |
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| CN105879636A (en) * | 2016-04-19 | 2016-08-24 | 庄建中 | Wet desulfurization equipment for coal fired boiler |
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