CN203030186U - Short-range quick-circulation semi-dry method smoke desulfurization reactor - Google Patents
Short-range quick-circulation semi-dry method smoke desulfurization reactor Download PDFInfo
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- CN203030186U CN203030186U CN 201220382237 CN201220382237U CN203030186U CN 203030186 U CN203030186 U CN 203030186U CN 201220382237 CN201220382237 CN 201220382237 CN 201220382237 U CN201220382237 U CN 201220382237U CN 203030186 U CN203030186 U CN 203030186U
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Abstract
The utility model relates to a short-range quick-circulation semi-dry method smoke desulfurization reactor which structurally comprises an inlet flue ash hopper, a direct current streamline inlet flue, an absorbent inlet tube, an inner circulation ash hopper, smoke accelerators, circulation ash return inlet tubes, a main reaction region diffuser barrel, main reaction region humidifying and activating nozzles, a main reaction region barrel, circulation ash collecting hoppers, a shutter gas-solid separator, a smoke rising channel, a stationary blade spiral-flow gas-solid separator, a sound wave ash blower, auxiliary reaction region smoke temperature regulation and control nozzles, an auxiliary reaction region barrel and an eccentric annular smoke outlet flue. The short-range quick-circulation semi-dry method smoke desulfurization reactor is reasonable in arrangement, high in desulphurization efficiency, low in gas-solid separation resistance and high in separation efficiency; a smoke flow field, a temperature field, a pressure field, an absorbent flow field and a humidifying and activating spray flow field are uniform and stable; a circulation path of an absorbent is short; a circulation ratio of the absorbent is high; a dust content of outlet smoke can be reduced effectively; severe working conditions such as wall wetting, scaling and bed collapsing can be avoided; and the reactor can operate stably for a long period.
Description
Technical field
The present invention relates to flue gas desulfurization technique and equipment, be specifically related to a kind of semidry-method recirculating fluidized bed flue gas desulfurization technique that is applicable to coal-burning power plant, waste incineration power plant, sintering machine, building material industry kiln.
Background technology
Semidry-method recirculating fluidized bed flue gas desulfurization technique technology is simple, reduced investment, occupation of land is little, operating cost is low, non-secondary pollution (non-wastewater discharge), desulfuration efficiency height, equipment do not corrode substantially, available general carbon steel manufacturing, meet China's actual conditions, thereby favored.But still there are three big technical barriers in its nucleus equipment---reactor: 1. flue gas flow field, absorbent flow field, humidification water smoke flow field are all very inhomogeneous, even serious bias current or local eddy currents; 2. sticking wall, conglomeration of desulfurization ash, the bed that collapses, stifled tower have generation more, cause desulphurization system to be difficult to realize long-period stable operation; 3. export the too high (800～1000g/Nm of dust content
3), causing the sack cleaner overload at rear portion, resistance drop improves fast.These Three Difficult Issues become the bottleneck of this technology of restriction.
Summary of the invention
Purpose of the present invention, be to overcome above-mentioned deficiency of the prior art, provide a kind of rational in infrastructure, flue gas flow field, absorbent flow field, humidification activation water smoke flow field, flue-gas temperature regulation and control water smoke flow field are all very even, main reaction region absorbent short distance circulates fast, realizes high-efficiency desulfurization, side reaction district flexible modulation flue-gas temperature, effectively prevent equipment corrosion, the semi-dry process flue gas desulphurization reactor that the outlet dust content significantly reduces.
The objective of the invention is to be achieved through the following technical solutions.
The present invention's primary structure from bottom to top comprises: the inlet flue duct ash bucket, the streamlined inlet flue duct of direct current, the absorbent entrance, be positioned at the circulation ash bucket at flue gas accelerator headboard center, the circulating ash reflux inlet pipe that joins with flue gas accelerator aditus laryngis, main reaction region diffuser cylindrical shell, be positioned at 6 main reaction region humidification activation nozzles at 6 flue gas accelerator central upper portion places, the main reaction region cylindrical shell that links to each other with main reaction region diffuser cylindrical shell, be attached to 6 circulating ash flue-dust retainers of main reaction region cylindrical shell upper inside wall, be positioned at the venetian blind type gas-solid separator of fixed blade cyclone type gas-solid separator bottom, connect main, the flue gas rising passway of side reaction district cylindrical shell, be positioned at reactor main reaction region top, fixed blade cyclone type gas-solid separator, be positioned at the acoustic wave ash ejector at fixed blade cyclone type gas-solid separator bell jar top, 3 side reaction district flue-gas temperature regulation and control nozzles, side reaction district cylindrical shell and eccentric annular exhanst gas outlet flue.
The streamlined inlet flue duct of described direct current cross section is square, comprises straight section, circular arc bend, 3 not isometric circle arc deflector, deflection cone and diffuser.
The circulation ash bucket is positioned at flue gas accelerator headboard center in described, and the ash bucket bottom is provided with conveying worm.
Described flue gas accelerator is 6 Laval nozzles.
Described circulating ash reflux inlet pipe is 6, and the aditus laryngis with 6 flue gas accelerators (Laval nozzle) joins respectively.
Described main reaction region humidification activation nozzle is 6 heavy pressure fine spray nozzles.
Described circulating ash flue-dust retainer is 6, is positioned at main reaction region cylinder inner surface (ash-collecting port is in the outside).
Described venetian blind type gas-solid separator adopts the corrugated leaf grating, and the bottom is provided with conical baffle.
Described flue gas rising passway for main reaction region desulfurization flue gas process fixed blade cyclone type gas-solid separator and venetian blind type gas-solid separator, removes after most desulfurization ashes, enters the exhaust gases passes in side reaction district.
Described stationary blade eddy flow gas-solid separator is positioned at reactor main reaction region top, is made of circular cone base plate, curved blade and bell jar.
Described acoustic wave ash ejector is positioned at the top of stationary blade eddy flow gas-solid separator bell jar.
Described side reaction district flue-gas temperature regulation and control nozzle is 3 heavy pressure fine spray nozzles.
The annular exhanst gas outlet flue of described off-centre is to constitute with the cylindrical shape flat-top cover of side reaction district cylindrical shell off-centre and downward-sloping flue.
The present invention adopts the True Data of actual engineering, through rigorous technology Calculation, and uses F1uent software to carry out the multiphase flow flow field analysis and is verified that effect is very good.
The present invention disposes rationally, and flue gas flow field, temperature field, pressure field, absorbent flow field, humidification activation water smoke flow field are all very even, stable; The absorbent circulating path is short, the circulating ratio height; Heavy pressure fine spray can not only make the effective humidification activation of absorbent, reduces flue-gas temperature, improves desulfuration efficiency, and can avoid bad working environments such as wet wall, fouling, the bed that collapses to take place; Fixed blade cyclone type gas-solid separator and venetian blind type gas-solid separator can be under very low resistance drop conditions, realize efficient gas solid separation, effectively reduce the dustiness of outlet flue gas, alleviated the load of rear portion sack cleaner greatly, guarantee device long period, stable operation.
Description of drawings
Fig. 1 is the structural representation of the present invention's " fast cyclic semidry process flue gas desulfurization reactor of short distance ".
Among the figure: 1. inlet flue duct ash bucket, 2. the streamlined inlet flue duct of direct current, 3. absorbent entrance, 4. interior circulation ash bucket, 5. flue gas accelerator, 6. circulating ash reflux inlet pipe, 7. main reaction region diffuser cylindrical shell, 8. main reaction region humidification activation nozzle, 9. main reaction region cylindrical shell, 10. circulating ash flue-dust retainer, 11. venetian blind type gas-solid separator, 12. flue gas rising passway, 13. fixed blade cyclone type gas-solid separator, 14. acoustic wave ash ejector, 15. side reaction district flue-gas temperature regulation and control nozzle, 16. side reaction district cylindrical shell, 17. eccentric annular exhanst gas outlet flue.
Fig. 2 is the vertical view of reactor; Fig. 3 is the partial enlarged drawing of venetian blind type gas-solid separator 11, flue gas rising passway 12 and fixed blade cyclone type gas-solid separator 13; Fig. 4 is the generalized section of fixed blade cyclone type gas-solid separator 13.
The specific embodiment
Referring to Fig. 1, unique texture of the present invention is: have the 3 not streamlined inlet flue duct of direct current, the interior circulation ash bucket that has conveying worm, " Laval nozzle " formula flue gas accelerator, heavy pressure fine spray humidification activation nozzle and flue-gas temperature regulation and control nozzle, fixed blade cyclone type gas-solid separator, the venetian blind type gas-solid separator that has the corrugated leaf grating, acoustic wave ash ejector and the eccentric annular exhanst gas outlets of isometric circle arc deflector.
The outlet flue gas of coal-fired plant boiler (or Industrial Boiler), enter direct current streamlined inlet flue duct 2 from this reactor bottom, fresh calcium hydroxide enters flue through absorbent entrance 3, with former flue gas through 3 isometric circle arc deflectors not, continue to move upward, enter the reactor main reaction region by 6 flue gas accelerators 5;
Volume more greatly in the boiler export flue gas, heavier particle lodges in inlet flue duct ash bucket 1, regularly discharges;
Main reaction region desulfurization flue gas is through fixed blade cyclone type gas-solid separator 13, solid phase particles thing (absorbent and product in the flue gas, general designation " desulfurization ash " or " circulating ash ") is thrown toward the blade wall, again by the centrifugal force under oblique and the effect of gravity, along the blade wall landing that faces down; Pass through venetian blind type gas-solid separator 11 again, the desulfurization ash that is separated (also claiming " circulating ash ") falls into 6 circulating ash flue-dust retainers 10 that are attached to the main reaction region cylinder inboard wall and flows downward, through circulating ash reflux inlet pipe 6, enter the flue gas accelerator from the aditus laryngis of flue gas accelerator 5; Because the flow velocity of flue gas accelerator aditus laryngis place flue gas was enhanced more than 3 times in moment, make aditus laryngis side openings place produce negative pressure, can suck the flue gas accelerator to circulating ash smoothly, and mix with fresh calcium hydroxide, boiler export flue gas, enter main reaction region together;
The flue gas that mixes with fresh calcium hydroxide, circulating ash is through 6 flue gas accelerators, even dispersion is in the main reaction region total space, and be installed in the heavy pressure fine spray of 1～10 μ m that 6 humidification activation nozzles 8 above the flue gas accelerator diffuser eject, can be at flash evapn, flue gas is lowered the temperature rapidly, make the calcium hydroxide humidification activation, with acidic gas in flue gas (SO
3, SO
2, HCl, HF etc.) ion reaction takes place, reach the purpose of depickling;
The interior solid phase particles thing of main reaction region this moment constantly collides, and be stripped from the product (powdery, salts substances) of sour gas on the calcium hydroxide surface, moves upward with flue gas; The cluster of grains that volume is bigger is difficult to rise with flue gas, and is gathered in the middle part of the main reaction region, and circulation ash bucket 4 in falling into is discharged through conveying worm;
Be installed on acoustic wave ash ejector 14 time openings at fixed blade cyclone type gas-solid separator 13 tops, be attached to the dust stratification on wall surface in order to removing;
Desulfurization flue gas by fixed blade cyclone type gas-solid separator 13 and venetian blind type gas-solid separator 11, through flue gas rising passway 12, enter the side reaction district, flue-gas temperature according to this moment, suitably adjust the injection flow rate of 3 flue-gas temperature regulation and control nozzles 15, with flue-gas temperature control more than dew-point temperature 15 ℃～20 ℃, guarantee that equipment does not corrode; In this zone, proceed desulphurization reaction, and carry fine dust (desulfurization ash) through eccentric annular exhaust pass, enter the sack cleaner at rear portion, proceed desulfurization and dedusting.
The invention has the advantages that:
1) the streamlined inlet flue duct of direct current: meet the natural streamline of flow of flue gas, form the inequality overcurrent at bend deflector cut section, effectively reduce the side direction eddy current, prevent the flue gas bias current, realize the steady flow that flue gas is evenly distributed in reactor; Fluid resistance is little; This structure is better than the bilateral air intake structure of German Wulff company, is better than single flow (two the 135 ° of knuckle elbows) air intake structure of German LLAG company, more is better than domestic traditional one-sided perpendicular quadrature air intake structure.
2) interior circulation ash bucket: the bottom has conveying worm.Can collect particle is big in the former flue gas in the main reaction region, density is bigger solid content or desulfurization ash group at any time, and in time discharge, improve the interior circulation environment of main reaction region.
3) flue gas accelerator: adopt Laval nozzle, the length of its aditus laryngis high regime is far smaller than the length of domestic and international CFB method venturi aditus laryngis high regime, so its resistance drop reduces greatly.Because the flow velocity of flue gas accelerator aditus laryngis place flue gas was enhanced more than 3 times in moment, make aditus laryngis side openings place produce negative pressure, can suck the flue gas accelerator to circulating ash smoothly, and mix with fresh calcium hydroxide, boiler export flue gas, enter main reaction region together.Can effectively improve the kinetic energy of flue gas in moment, realize that flue gas to the acceleration of solid particulate matter (absorbent), guarantees that absorbent is suspended in the flue gas equably, make that the gas-solid two-phase is fully mixed, collision, friction, mass transfer, heat transfer, reaction.
4) main reaction region humidification activation nozzle and side reaction district flue-gas temperature regulation and control nozzle: adopt the heavy pressure fine spray nozzle, water smoke continues evenly, mist particle diameter is little, be generally 1～10 μ m, I reaches nanoscale, specific area substantially exceeds general water smoke, and droplet speed height, density are big, can evaporate rapidly, absorb heat, lower the temperature; Can make absorbent surface moistening rapidly, humidification activation effectively improves its reactivity; And greatly increase absorbent and SO
2, SO
3, the contact of sour gas such as HCL, HF water film surface long-pending, in gaseous state, liquid state with under the vapor state between the gas-liquid, make SO
2, SO
3, sour gas such as HCL, HF, through absorption, humidification, cohesion, friction, collision, mass transfer, heat transfer, ion reaction, thereby reach the purpose of efficient depickling.Because uniformly flue gas and absorbent flow field have surrounded uniform spray vaporization flow field, can effectively avoid because of the excessive wet wall effect that causes of part water spray, avoid sticking wall, fouling, conglomeration, the bed that collapses, stifled tower phenomenon take place, assurance device is stable, long-term operation.
5) fixed blade cyclone type gas-solid separator: flue gas is along the direct current radiation direction, enter downward-sloping tangential swirl passage, after particle in the flue gas obtains a little acceleration, obtain the enough downward centrifugal force of inclination rotation, and the limit wall shift that is affixed to deflector is moving, by the centrifugal force under oblique and the synergy of gravity, along the blade wall landing that faces down, reach the purpose of gas solid separation.
6) venetian blind type gas-solid separator: adopt the corrugated leaf grating, the bottom is provided with conical baffle.Flue gas by fixed blade cyclone type gas-solid separator flows downward, the corrugated leaf grating of bump louver separator, and solid particle wherein compiles and separates to trough, and flue gas is then from the crest flow-disturbing of leaf grating.Conical baffle is set below leaf grating, can effectively alleviates the reentrainment of particle.
7) acoustic wave ash ejector: convert compressed air to powerful sound wave, the dust stratification of each parts surface in the reactor is subjected to the alternately effect of tension and compression repeatedly of the dilatational wave of variation of certain frequency, destroy and stop the combination of dust granules and reactor internals wall, make flue gas and dust granules produce vibration, make it to be in suspended state, in order to taken away by flue gas; Sound wave can run through and clean unapproachable position, effectively blows grey radius and can reach 7～10m, no dead angle; The surface of being cleared up can not produce mechanical wear; Operating cost is low, and technology maturation is reliable.
8) eccentric annular exhanst gas outlet flue: by constituting with the cylindrical shape flat-top cover of side reaction district cylindrical shell off-centre and downward-sloping flue.Adopt this structure can thoroughly eliminate traditional interior swirling eddy of CFB method reactor sidepiece outlet tower, fall more more favourable than annular concentric exhanst gas outlet to keeping the uniform flue gas flow field in reactor side reaction district, increase effective reaction space, reduction reactor pressure.
Claims (10)
1. fast cyclic semidry process flue gas desulfurization reactor of short distance, it is characterized in that: structure from bottom to top is followed successively by: inlet flue duct ash bucket (1), the streamlined inlet flue duct of direct current (2), absorbent entrance (3), be positioned at the circulation ash bucket (4) at flue gas accelerator (5) headboard center, the circulating ash reflux inlet pipe (6) that joins with flue gas accelerator aditus laryngis, main reaction region diffuser cylindrical shell (7), be positioned at 6 main reaction region humidification activation nozzles (8) at 6 flue gas accelerator central upper portion places, the main reaction region cylindrical shell (9) that links to each other with main reaction region diffuser cylindrical shell, be attached to 6 circulating ash flue-dust retainers (10) of main reaction region cylindrical shell upper inside wall, be positioned at the venetian blind type gas-solid separator (11) of fixed blade cyclone type gas-solid separator (13) bottom, connect main, the flue gas rising passway (12) of side reaction district cylindrical shell, be positioned at reactor main reaction region top, fixed blade cyclone type gas-solid separator (13), be positioned at the acoustic wave ash ejector (14) at fixed blade cyclone type gas-solid separator bell jar top, 3 side reaction district flue-gas temperature regulation and control nozzles (15), side reaction district cylindrical shell (16) and eccentric annular exhanst gas outlet flue (17).
2. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1, it is characterized in that: the streamlined inlet flue duct of described direct current (2) is for the square-section, comprises straight section, circular arc bend, 3 not isometric circle arc deflector, deflection cone and diffuser.
3. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1 is characterized in that: be provided with conveying worm in described bottom the circulation ash bucket (4).
4. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1, it is characterized in that: described flue gas accelerator (5) is 6 Laval nozzles.
5. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1, it is characterized in that: described circulating ash reflux inlet pipe (6) is 6, the aditus laryngis with 6 Laval nozzle formula flue gas accelerators joins respectively.
6. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1, it is characterized in that: described main reaction region humidification activation nozzle (8) is 6 heavy pressure fine spray nozzles.
7. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1 is characterized in that: described venetian blind type gas-solid separator (11) adopts the corrugated leaf grating, and the bottom is provided with conical baffle.
8. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1 is characterized in that: described fixed blade cyclone type gas-solid separator (13), be positioned at reactor main reaction region top, and constituted by circular cone base plate, curved blade and bell jar.
9. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1 is characterized in that: described side reaction district flue-gas temperature regulation and control nozzle (15) is 3 heavy pressure fine spray nozzles.
10. the fast cyclic semidry process flue gas desulfurization reactor of short distance according to claim 1 is characterized in that: the annular exhanst gas outlet flue of described off-centre (17), and for constituting with the cylindrical shape flat-top cover of side reaction district cylindrical shell off-centre and downward-sloping flue.
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|---|---|---|---|
| CN 201220382237 CN203030186U (en) | 2012-08-03 | 2012-08-03 | Short-range quick-circulation semi-dry method smoke desulfurization reactor |
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| CN 201220382237 CN203030186U (en) | 2012-08-03 | 2012-08-03 | Short-range quick-circulation semi-dry method smoke desulfurization reactor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103657388A (en) * | 2013-12-06 | 2014-03-26 | 无锡雪浪环境科技股份有限公司 | COCone type semidry process reaction tower |
| CN103721484A (en) * | 2012-10-15 | 2014-04-16 | 北京博朗环境工程技术股份有限公司 | Semi-dry flue gas purification technology for synergistic removal of various pollutants by coaxial short-range rapid circulation |
| CN105126460A (en) * | 2015-08-20 | 2015-12-09 | 中国石油大学(北京) | Desulphurization dedusting integrated half-dry type swirl desulfurization tower |
| CN108006686A (en) * | 2017-12-29 | 2018-05-08 | 中冶赛迪工程技术股份有限公司 | A kind of chilling waste heat boiler |
| CN108360094A (en) * | 2018-03-13 | 2018-08-03 | 江苏精亚环境科技有限公司 | A kind of cyclone separator of the anti-paste net and normal pressure blanking blowout prevention ash of automatically cleaning filter cylinder |
| CN109224644A (en) * | 2018-09-29 | 2019-01-18 | 南京航空航天大学 | Axial-flow type dust-extraction unit and method |
| CN113680145A (en) * | 2021-08-20 | 2021-11-23 | 中国石油大学(北京) | Circulating gas purification device and purification method thereof |
| CN108006686B (en) * | 2017-12-29 | 2024-04-30 | 中冶赛迪工程技术股份有限公司 | Quenching waste heat boiler |
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| CN103721484A (en) * | 2012-10-15 | 2014-04-16 | 北京博朗环境工程技术股份有限公司 | Semi-dry flue gas purification technology for synergistic removal of various pollutants by coaxial short-range rapid circulation |
| CN103657388A (en) * | 2013-12-06 | 2014-03-26 | 无锡雪浪环境科技股份有限公司 | COCone type semidry process reaction tower |
| CN103657388B (en) * | 2013-12-06 | 2015-11-04 | 无锡雪浪环境科技股份有限公司 | A kind of taper semidry method reaction tower |
| CN105126460A (en) * | 2015-08-20 | 2015-12-09 | 中国石油大学(北京) | Desulphurization dedusting integrated half-dry type swirl desulfurization tower |
| CN108006686A (en) * | 2017-12-29 | 2018-05-08 | 中冶赛迪工程技术股份有限公司 | A kind of chilling waste heat boiler |
| CN108006686B (en) * | 2017-12-29 | 2024-04-30 | 中冶赛迪工程技术股份有限公司 | Quenching waste heat boiler |
| CN108360094A (en) * | 2018-03-13 | 2018-08-03 | 江苏精亚环境科技有限公司 | A kind of cyclone separator of the anti-paste net and normal pressure blanking blowout prevention ash of automatically cleaning filter cylinder |
| CN108360094B (en) * | 2018-03-13 | 2023-07-21 | 江苏精亚环境科技有限公司 | Cyclone separator capable of automatically cleaning filter cylinder to prevent pasting net and normal-pressure blanking to prevent dust spraying |
| CN109224644A (en) * | 2018-09-29 | 2019-01-18 | 南京航空航天大学 | Axial-flow type dust-extraction unit and method |
| CN109224644B (en) * | 2018-09-29 | 2024-03-29 | 南京航空航天大学 | Axial flow type dust removing device and method |
| CN113680145A (en) * | 2021-08-20 | 2021-11-23 | 中国石油大学(北京) | Circulating gas purification device and purification method thereof |
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