CN203400626U - Circulating fluidized bed reactor with low-resistance single-tube internal circulation, and function of simultaneous desulfurization and denitrification for smoke - Google Patents
Circulating fluidized bed reactor with low-resistance single-tube internal circulation, and function of simultaneous desulfurization and denitrification for smoke Download PDFInfo
- Publication number
- CN203400626U CN203400626U CN201320459778.XU CN201320459778U CN203400626U CN 203400626 U CN203400626 U CN 203400626U CN 201320459778 U CN201320459778 U CN 201320459778U CN 203400626 U CN203400626 U CN 203400626U
- Authority
- CN
- China
- Prior art keywords
- flue
- smoke
- flue gas
- circulating
- reactor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model relates to a circulating fluidized bed reactor with low-resistance single-tube internal circulation, and a function of simultaneous desulfurization and denitrification for smoke. The structure of the circulating fluidized bed reactor comprises an inlet flue ash bucket, a direct-flow type linear inlet flue, an absorbent inlet tube, a smoke accelerator, a reactor barrel body diffusion section, a humidification activation nozzle, a circulating ash downcomer, a smoke temperature regulation nozzle, a reactor barrel body, a pneumatic transmission booster, the smoke inlet channel of a cyclone separator, a direct-flow type cyclone separator with four tangential inlets, and an annular smoke outlet flue. The circulating fluidized bed reactor disclosed by the utility model is reasonable in configuration, uniform and stable in a smoke flow field, a temperature field, a pressure field, an absorbent flow field, a humidification activation water mist flow field and a smoke temperature regulation water mist flow field, short in absorbent circulating route, high in circulating ratio, high in desulfurization efficiency, low in gas-solid separation resistance, high in separation efficiency, capable of effectively decreasing the dust content of outlet smoke, and capable of avoiding the occurrences of bad working conditions such as wetted wall, scale formation and bed collapse, thus guaranteeing the long-cycle and stable running of the device.
Description
Technical field
The present invention relates to the recirculating fluidized bed consersion unit of flue gas and desulfurizing and denitrifying, be specifically related to a kind of less semidry-method recirculating fluidized bed flue gas and desulfurizing and denitrifying technology of exhaust gas volumn such as burning power plant, glass furnace that are applicable to.
Background technology
Semidry-method recirculating fluidized bed flue gas and desulfurizing and denitrifying technology is at present in the starting stage.Simple due to its technique, there is no SCR gas denitrifying technology complexity spray ammonia system, there is no SCR denitration reaction device, reduced investment, take up an area little, operating cost is low, non-secondary pollution (non-wastewater discharge), denitrification efficiency are high, equipment does not corrode substantially, available general carbon steel manufacture, meet China's actual conditions, prospect is very considerable.But still there are three large technical barriers in its nucleus equipment one by one 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. how sticky wall, conglomeration of desulphurization denitration product, the bed that collapses, stifled tower can occur, and cause whole 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 whether this technology of restriction can be promoted smoothly.
Summary of the invention
Object 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, and rich oxygen type high-efficiency absorbent is short distance Rapid Circulation in reactor, realizes high-efficiency desulfurization denitration, flexible modulation flue-gas temperature, effectively prevent equipment corrosion, outlet dust content greatly reduces, the circulating fluid bed reactor of circulation, flue gas and desulfurizing and denitrifying in lower resistance single tube.
The object of the invention is to be achieved through the following technical solutions.
The present invention in vain lower and on primary structure comprise: inlet flue duct ash bucket, the streamlined inlet flue duct of direct current, absorbent entrance, flue gas accelerator, reactor shell diffuser, be positioned at 6 humidification activation nozzles at 6 flue gas accelerator central upper portion places, be positioned at the circulating ash down-comer of reactor axis, 3 flue-gas temperature regulation and control nozzles, reactor shell, strength is carried boost motor, the intake channel of cyclone separator flue gas, the single flow cyclone separator of 4 tangential entries and the ring smoke exhaust pass that is positioned at reactor head.
The streamlined inlet flue duct of described direct current cross section is square, comprises straight section, circular arc curve, 3 not isometric circle arc deflector and diffuser.
Described flue gas accelerator is 6 Laval nozzles, for overcoming the wall attachment effect of particle, by inside (reactor center line) the 3 ° of angles that tilt of the axis of flue gas accelerator.
Described humidification activation nozzle is 6 high-pressure fine water mist nozzles.
Described circulating ash down-comer outlet at bottom is 6, aims at respectively the orientation of 6 flue gas accelerators.
Described flue-gas temperature regulation and control nozzle is 3 high-pressure fine water mist nozzles.
Described strength is carried boost motor, passes into compressed air during operation.
The single flow cyclone separator of 4 described tangential entries, its intake channel is comprised of 4 tangential entries, its inner barrel is a kind of conic tube, its center blast pipe is circular cylindrical shell, bottom is provided with a umbrella shape getter section, the outer wall of central row tracheae cylinder is welded with 3 spiral stream guidance fins that rotate up, and bottom dust flue is provided with small-sized dust storage chamber.
Described ring smoke exhaust pass, consists of angle cylinder, concentric circles tubular flat-top cover and downward-sloping flue.
The present invention adopts the True Data of Practical Project, through rigorous technology Calculation, and uses Fluent software to carry out multiphase flow flow field analysis and is verified, effect is very good.
The present invention configures rationally, and it is all very even, stable that flue gas flow field, temperature field, pressure field, absorbent flow field, humidification activation water smoke flow field, flue-gas temperature regulate and control water smoke flow field; Absorbent circulating path is short, and circulating ratio is high; Heavy pressure fine spray can not only make the effective humidification activation of absorbent, reduces flue-gas temperature, improves desulfuration efficiency, and can avoid the bad working environments such as wet wall, fouling, the bed that collapses to occur; The single flow cyclone separator of 4 tangential entries can be realized efficient gas solid separation under the condition of lower drag, effectively reduces the dustiness of reactor outlet flue gas, has greatly alleviated the load of rear portion sack cleaner, guarantees device long period, stable operation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's " circulating fluid bed reactor of circulation, flue gas and desulfurizing and denitrifying in lower resistance single tube ".
In figure: 1. inlet flue duct ash bucket, 2. the streamlined inlet flue duct of direct current, 3. absorbent entrance, 4. flue gas accelerator, 5. reactor shell diffuser, 6. humidification activation nozzle, 7. circulating ash down-comer, 8. flue-gas temperature regulation and control nozzle, 9. reactor shell, 10. strength is carried boost motor, the gas approach passage of 11. cyclone separators, the single flow cyclone separator of 12.4 tangential entries, 13. ring smoke exhaust pass.
Fig. 2 is the layout drawing of 4 tangential entry flues of single flow cyclone separator of 4 tangential entries.
Fig. 3 is 3 flue-gas temperature regulation and control arrangement of nozzles figure.
Fig. 4 is 6 humidification activation nozzles and 6 flue gas accelerator layout drawings.
The specific embodiment
Referring to Fig. 1, unique texture of the present invention is: with 3 not isometric circle arc deflector the streamlined inlet flue duct of direct current, Laval nozzle formula flue gas accelerator, heavy pressure fine spray humidification activation nozzle and flue-gas temperature regulation and control nozzle, have 4 tangential entries single flow cyclone separator, with strength, carry boost motor and lower end to there is the circulating ash down-comer of 6 outlets, and the ring smoke consisting of angle cylinder, concentric circles tubular flat-top cover and downward-sloping flue exports.
The outlet flue gas of burning power plant boiler (or glass furnace), from this reactor bottom, enter direct current streamlined inlet flue duct 2, fresh rich oxygen type high-efficiency absorbent enters flue through absorbent entrance 3, together with former flue gas through 3 isometric circle arc deflectors not, continue to move upward, by 6 flue gas accelerators 4, enter reactor main reaction region;
In former flue gas, larger, the heavier particle of volume lodges in inlet flue duct ash bucket 1, regularly discharges;
Carry the former flue gas of fresh rich oxygen type high-efficiency absorbent and a large amount of circulating ash, through flue gas accelerator moment flue gas flow rate, be enhanced more than 3 times, and even dispersion is in the main reaction region total space.And be arranged on 6 humidification activation nozzles 6 above flue gas accelerator diffuser, the heavy pressure fine spray of 1～10 μ m ejecting, can, at flash evapn, make rich oxygen type high-efficiency absorbent surface humidification activation, flue gas is lowered the temperature rapidly, and with flue gas in sour gas (SO
3, SO
2, NO
x, HCl, HF etc.) strong collision, mixing, mass transfer, heat transfer, there is ion reaction, reach the object of desulphurization denitration.Solid phase particles thing in main reaction region constantly collides, and rich oxygen type high-efficiency absorbent surface is stripped from the product (powdery, salts substances) of sour gas, with flue gas, moves upward; The cluster of grains that volume is larger is difficult to rise with flue gas, and assemble landing, enters inlet flue duct ash bucket 1, through conveying worm, discharges.
The flue gas that has substantially completed desulfurization and denitrification reaction continues upwards to flow, mix with the heavy pressure fine spray of 3 flue-gas temperature regulation and control nozzle spray 8 1～10 μ m that eject, proceed desulfurization and denitrification reaction, (Gu Gai district is also called side reaction district), regulate and control flue-gas temperature simultaneously, with regulating the way of injection flow rate that temperature is controlled at higher than 15 ℃～20 ℃ left and right of flue gas dew point temperature, to guarantee that carbon steel equipment does not corrode substantially.
The flue gas that has completed desulfurization and denitrification reaction continues upwards to flow, and by the intake channel 11 of cyclone separator flue gas, enters the single flow cyclone separator 12 of 4 tangential entries.With desulphurization denitration product with there is no the flue gas of the absorbent powder of complete reaction, annular space between cyclone separator inner barrel and central row tracheae compares the screw rotating up of standard, larger, the heavier particle of most of particle diameter throws away from inner barrel top by centrifugal force, downslide deposits to the cyclone separator cone end, enter small-sized dust storage chamber, flow into circulating ash down-comer 7.
Separated get off, contain the particle that there is no in a large number the rich oxygen type of complete reaction high-efficiency absorbent and desulphurization denitration product, through circulating ash down-comer 7, by self gravitation, and strength is carried boost motor 10, by the compressed air that tiltedly tangential small-hole enters downwards, promoted to flow downward, from 6 outlets of down-comer bottom are flowed out, by the former flue gas stream of the high speed with fresh rich oxygen type high-efficiency absorbent, brought into flue gas accelerator 4, mix that speed-raising is laggard enters main reaction region, mix with humidification activation water smoke, continue to participate in desulfurization and denitrification reaction.
The powder that small part particle diameter is very little upwards flows with swirl flow, with main flume (desulphurization denitration, and the flue gas that purified of rough dusting) converge, by the annular space between angle cylinder and concentric circles tubular flat-top cover, the sack cleaner that drains into rear portion through downward-sloping flue, continues to remove tiny dust.
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 inequality overcurrent at bend deflector cut section, effectively reduce side direction eddy current, prevent 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, is more better than domestic traditional one-sided perpendicular quadrature air intake structure.
2) 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.Carry the former flue gas of fresh rich oxygen type high-efficiency absorbent and a large amount of circulating ash, through flue gas accelerator moment flow velocity, be enhanced more than 3 times, they enter main reaction region together.Can effectively improve the kinetic energy of flue gas, realize the acceleration of flue gas to solid particulate matter (absorbent), guarantee that absorbent is suspended in flue gas equably, make that gas-solid two-phase is fully mixed, collision, friction, mass transfer, heat transfer, reaction.
3) main reaction region humidification activation nozzle and side reaction district flue-gas temperature regulation and control nozzle: adopt high-pressure fine water mist 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 is high, density is large, can evaporate rapidly, absorbs 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, NO
x, the contact of the sour gas such as HCL, HF water film surface long-pending, in gaseous state, liquid state with make SO under the vapor state between gas-liquid
2, SO
3, NO
x, the sour gas such as HCL, HF, through absorption, humidification, cohesion, friction, collision, mass transfer, heat transfer, ion reaction, thereby reach the object 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 causing of part water spray, avoid sticky wall, fouling, conglomeration, the bed that collapses, stifled tower phenomenon occur, assurance device is stable, long-term operation.
4) the single flow cyclone separator of 4 tangential entries: its intake channel is comprised of 4 tangential entries, its inner barrel is a kind of conic tube, its center blast pipe is circular cylindrical shell, bottom is provided with a umbrella shape getter section, the outer wall of central row tracheae cylinder is welded with 3 spiral stream guidance fins that rotate up, and bottom dust flue is provided with small-sized dust storage chamber.
5) circulating ash down-comer: owing to carrying boost motor with strength, by a plurality of compressed air that tiltedly tangential small-hole enters downwards, can promote circulating ash powder and flow downward smoothly.Circulating ash down-comer outlet at bottom is 6, aims at respectively the orientation of 6 flue gas accelerators.Circulating ash down-comer bottom is in flue gas high velocity, and high speed flue gas portability circulating ash continues to move upward, and enters flue gas accelerator.
6) ring exit flue: the flue gas that desulphurization denitration and rough dusting have purified, by the annular space between angle cylinder and concentric circles tubular flat-top cover, be conducive in reactor flue gas flow field even, hoop resistance drop is even.
Claims (2)
1. circulation in a lower resistance single tube, the circulating fluid bed reactor of flue gas and desulfurizing and denitrifying, it is characterized in that: structure is from bottom to top followed successively by: inlet flue duct ash bucket (1), the streamlined inlet flue duct of direct current (2), be positioned at the absorbent entrance (3) at inlet flue duct central upper portion line place, flue gas accelerator (4), reactor shell diffuser (5), be positioned at 6 main reaction region humidification activation nozzles (6) at 6 flue gas accelerator central upper portion places, be positioned at the circulating ash down-comer (7) of reactor axis, 3 flue-gas temperature regulation and control nozzles (8), reactor shell (9), the strength that is positioned at circulating ash down-comer middle and upper part is carried booster (10), the gas approach flue (11) of cyclone separator, the single flow cyclone separator (12) of 4 tangential entries, ring exit flue (13).
2. the circulating fluid bed reactor of the interior circulation of lower resistance single tube according to claim 1, flue gas and desulfurizing and denitrifying, it is characterized in that: the single flow cyclone separator (12) of 4 described tangential entries, its intake channel is comprised of 4 tangential entries, its inner barrel is a kind of conic tube, its center blast pipe is circular cylindrical shell, bottom is provided with a umbrella shape getter section, the outer wall of central row tracheae cylinder is welded with 3 spiral stream guidance fins that rotate up, and bottom dust flue is provided with small-sized dust storage chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320459778.XU CN203400626U (en) | 2013-07-31 | 2013-07-31 | Circulating fluidized bed reactor with low-resistance single-tube internal circulation, and function of simultaneous desulfurization and denitrification for smoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320459778.XU CN203400626U (en) | 2013-07-31 | 2013-07-31 | Circulating fluidized bed reactor with low-resistance single-tube internal circulation, and function of simultaneous desulfurization and denitrification for smoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203400626U true CN203400626U (en) | 2014-01-22 |
Family
ID=49936569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320459778.XU Expired - Fee Related CN203400626U (en) | 2013-07-31 | 2013-07-31 | Circulating fluidized bed reactor with low-resistance single-tube internal circulation, and function of simultaneous desulfurization and denitrification for smoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203400626U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984646A (en) * | 2015-04-24 | 2015-10-21 | 武金玉 | Desulfurization tower flue gas nozzle and desulfurization apparatus |
| CN108452593A (en) * | 2018-03-05 | 2018-08-28 | 武汉科技大学 | A kind of high-efficiency low-resistance fluidisation demister arrangements and its defogging method |
| CN109224644A (en) * | 2018-09-29 | 2019-01-18 | 南京航空航天大学 | Axial-flow type dust-extraction unit and method |
-
2013
- 2013-07-31 CN CN201320459778.XU patent/CN203400626U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984646A (en) * | 2015-04-24 | 2015-10-21 | 武金玉 | Desulfurization tower flue gas nozzle and desulfurization apparatus |
| CN108452593A (en) * | 2018-03-05 | 2018-08-28 | 武汉科技大学 | A kind of high-efficiency low-resistance fluidisation demister arrangements and its defogging method |
| CN108452593B (en) * | 2018-03-05 | 2023-11-17 | 国网浙江省电力有限公司台州供电公司 | Low-resistance high-efficiency fluidization demister device and demisting method thereof |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205461778U (en) | Semidry method circulating fluidized bed flue gas is SOx/NOx control device simultaneously | |
| EP3202483B1 (en) | Rotational flow and sink flow-coupling integrated system for ultra-clean desulphuration and dedusting and desulphuration and dedusting method therefor | |
| CN101402019B (en) | Flue gas desulfurization reactor of return current circulating fluidized bed in flow equalizing field | |
| CN203030186U (en) | Short-range quick-circulation semi-dry method smoke desulfurization reactor | |
| CN102784556B (en) | Homogeneous flow-field circulating fluidized bed flue gas desulfurization technology | |
| CN205461770U (en) | Quick circulation of coaxial short distance is semidry method gas cleaning equipment of desorption pollutant in coordination | |
| CN101690867B (en) | Tangential-flow and direct-flow composite air intake desulfurizing tower of half dry type circulating fluidized bed (CFB) | |
| CN103506005B (en) | SCR denitration device and denitration method applicable to middle and small-size boilers | |
| CN105233661A (en) | Semidry method desulfurization tower device | |
| CN203400626U (en) | Circulating fluidized bed reactor with low-resistance single-tube internal circulation, and function of simultaneous desulfurization and denitrification for smoke | |
| CN102266718B (en) | Semi dry process flue gas desulfurization method of circulating fluidized bed based on circulation, and apparatus thereof | |
| CN103816775B (en) | Non-maintaining semi-dry process flue gas desulphurization absorption tower | |
| CN203342648U (en) | Circulating fluid bed reactor realizing single-pipe internal circulating of absorbent and simultaneous desulfuration and denitration of smoke | |
| CN108671715A (en) | A kind of coal-fired flue-gas sulfur trioxide removing means and its application method and application | |
| CN106268282B (en) | Circulating fluid bed flue-gas desulfurizing device | |
| CN102423593A (en) | Method for simultaneously dedusting, desulphurizing and denitrating boiler flue gas in coal-fired industry | |
| CN101357299A (en) | Desulfurization reaction tower of circulating fluid bed | |
| CN203820734U (en) | Two-stage combined washing and dust removing device for synthesis gas containing solid particles | |
| CN100368070C (en) | Circulation fluidized bed swirl-direct flow composite fluidizing device | |
| CN201760230U (en) | Flue gas desulfurization reactor for circulating fluidized bed of uniform flow field | |
| CN201880473U (en) | Venturi spraying and wet static electricity combined type flue gas treatment reactor | |
| CN102441324A (en) | Flue gas desulfurization reactor of descending circulating fluidized bed | |
| CN208878220U (en) | Powdered activated coke adsorpting desulfurization device | |
| CN113457859A (en) | Cyclone separator and solid-gas separation system | |
| CN202191838U (en) | Flue gas treatment device of coal-fired industrial boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 Termination date: 20180731 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |