CN203342648U - Circulating fluid bed reactor realizing single-pipe internal circulating of absorbent and simultaneous desulfuration and denitration of smoke - Google Patents
Circulating fluid bed reactor realizing single-pipe internal circulating of absorbent and simultaneous desulfuration and denitration of smoke Download PDFInfo
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- CN203342648U CN203342648U CN 201320351081 CN201320351081U CN203342648U CN 203342648 U CN203342648 U CN 203342648U CN 201320351081 CN201320351081 CN 201320351081 CN 201320351081 U CN201320351081 U CN 201320351081U CN 203342648 U CN203342648 U CN 203342648U
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- absorbent
- flue
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- smoke
- flue gas
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Abstract
The utility model relates to a circulating fluid bed reactor realizing single-pipe internal circulating of an absorbent and simultaneous desulfuration and denitration of smoke. The circulating fluid bed reactor structurally comprises an inlet flue ash hopper, a direct flow streamline inlet flue, an absorbent inlet pipe, smoke accelerators, a reactor barrel diffusing section, humidifying activation nozzles, circulating ash downcomers, smoke temperature regulation nozzles, a reactor barrel, a pneumatic conveying booster, a smoke inlet channel of a cyclone separator, the cyclone separator with a plurality of tangential inlets, and an annular smoke outlet flue. The reactor is reasonable in configuration; all of a smoke flow field, a temperature field, a pressure field, an absorbent flow field, a humidifying activated water mist flow field, and a smoke temperature regulation water mist flow field are very uniform and stable; a circulating path of the absorbent is short; a circulating ratio of the absorbent and a desulfurization efficiency are high; the resistance to gas-solid separation is low; a gas-solid separation efficiency is high; a dust content of outlet smoke can be reduced effectively; severe working conditions such as a wet wall, scaling and bed collapse can be avoided; and the long-period and stable operation of the reactor is ensured.
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 semidry-method recirculating fluidized bed flue gas and desulfurizing and denitrifying technology that is applicable to coal-burning power plant, burning power plant, sintering machine, building material industry kiln.
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, as 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 reactor one by one: 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
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, and the rich oxygen type high-efficiency absorbent is the short distance Rapid Circulation in reactor, realizes the high-efficiency desulfurization denitration, the flexible modulation flue-gas temperature, effectively prevent equipment corrosion, the outlet dust content greatly reduces, the circulating fluid bed reactor of circulation, flue gas and desulfurizing and denitrifying in the absorbent single tube.
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, the flue gas accelerator, the 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 booster, the intake channel of cyclone separator flue gas, the cyclone separator of a plurality of 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 booster, passes into compressed air during operation.
The cyclone separator of described a plurality of tangential entries, its intake channel is comprised of a plurality of rotating liquid drop shape guide vanes, and its exhaust core pipe outer wall is welded with downward-sloping spiral stream guidance fin, and exhaust core pipe bottom cone inwall is welded with a broken rotating plate.
Described ring smoke exhaust pass, consist 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 proved, and 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 the water smoke flow field; The 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 cyclone separator of a plurality of tangential entries can be realized efficient gas solid separation under lower resistance drop condition, 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.
The accompanying drawing explanation
The structural representation that Fig. 1 is the present invention's " circulating fluid bed reactor of circulation, flue gas and desulfurizing and denitrifying in the absorbent single tube ".
In figure: 1. the inlet flue duct ash bucket, 2. the streamlined inlet flue duct of direct current, 3. the absorbent entrance, 4. the flue gas accelerator, 5. the reactor shell diffuser, 6. the humidification activation nozzle, 7. the circulating ash down-comer, 8. flue-gas temperature regulation and control nozzle, 9. reactor shell, 10. strength is carried booster, the gas approach passage of 11. cyclone separators, the cyclone separator of more than 12. tangential entry, 13. ring smoke exhaust pass.
The rotating liquid drop shape guide vane layout drawing that Fig. 2 is a plurality of tangential entry cyclone separators.
Fig. 3 is 3 flue-gas temperature regulation and control arrangement of nozzles figure.
The specific embodiment
Referring to Fig. 1, unique texture of the present invention is: with 3 not the 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 a plurality of tangential entries cyclone separator, with strength, carry booster and lower end to there is the circulating ash down-comer of 6 outlets and the ring smoke formed by angle cylinder, concentric circles tubular flat-top cover and downward-sloping flue outlet.
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 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 the 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, be enhanced more than 3 times through flue gas accelerator moment flue gas flow rate, 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 ejected, 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, ion reaction occurs, reach the purpose 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, with the heavy pressure fine spray of 3 flue-gas temperature regulation and control nozzle spray 8 1～10 μ m that eject, mix, proceed desulfurization and denitrification reaction, (the Gu Gai district also is called the side reaction district), regulate and control flue-gas temperature simultaneously, by the way of regulating injection flow rate, temperature is controlled at higher than 15 ℃～20 ℃ left and right of flue gas dew point temperature, to guarantee carbon steel equipment corrosion not 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, and a plurality of rotating liquid drop shape guide vane, enters the cyclone separator 12 of a plurality of tangential entries.With the desulphurization denitration product with there is no the flue gas of the absorbent powder of complete reaction, compare the downward-sloping screw of standard in the cyclone separator cylindrical shell, larger, the heavier particle of most of particle diameter gets rid of to wall by centrifugal force, downslide deposits to the cyclone separator cone end, enters 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 booster 10 to cut sth. askew downwards to enter into compressed air to aperture and is flowed downward under promoting, from 6 outlets of down-comer bottom are flowed out, brought into flue gas accelerator 4 by the former flue gas stream of the high speed with fresh rich oxygen type high-efficiency absorbent, mix that speed-raising is laggard enters main reaction region, mix the sustainable participation desulfurization and denitrification reaction with humidification activation water smoke.
The powder that the small part particle diameter is very little upwards flows with swirl flow, runs into the broken rotating plate of Net exhanst gas outlet bottom, understands some powder and falls, and reduces the band dust quantity of swirl flow flue gas, and the rising flue gas enters ring smoke exhaust pass 13 by the Net exhanst gas outlet.
The flue gas that desulphurization denitration, and rough dusting has purified, by the annular space between angle cylinder and concentric circles tubular flat-top cover, drain into the sack cleaner at rear portion through downward-sloping flue, continue 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, at bend deflector cut section, form the inequality overcurrent, 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) 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, be enhanced more than 3 times through flue gas accelerator moment flow velocity, 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 the 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 improve 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 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 caused 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) cyclone separator of a plurality of tangential entries: a plurality of tangential entries of cyclone separator are comprised of several rotating liquid drop shape guide vanes, and this structure is highly beneficial to being uniformly distributed of the gas of the major and minor reaction zone of reactor, solid, water smoke flow field; The exhaust core pipe outer wall is welded with the spiral stream guidance fin, but the spiral rotating motion oliquely downward of standard ash-laden gas improves separative efficiency, reduces Pressure Drop; The broken rotating plate of exhaust core pipe below, can reduce the band dust quantity of swirl flow flue gas, improves the gas solid separation efficiency of cyclone separator.
5) circulating ash down-comer: owing to strength, carrying booster, by a plurality of compressed air of cutting sth. askew downwards and entering to aperture, can promote the circulating ash powder and flow downward smoothly.Circulating ash down-comer bottom is in the flue gas high velocity, and high speed flue gas portability circulating ash continues to move upward, and enters the 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, the hoop resistance drop is even.
Claims (3)
1. in an absorbent single tube, circulate, the circulating fluid bed reactor of flue gas and desulfurizing and denitrifying, 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), 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 cyclone separator of a plurality of tangential entries (12), ring exit flue (13).
2. the circulating fluid bed reactor of the interior circulation of absorbent single tube according to claim 1, flue gas and desulfurizing and denitrifying, it is characterized in that: described circulating ash down-comer (7) middle and upper part is provided with strength and carries booster (10), circulating ash down-comer (7) outlet at bottom is 6, aims at respectively the orientation of 6 flue gas accelerators (4).
3. the circulating fluid bed reactor of the interior circulation of absorbent single tube according to claim 1, flue gas and desulfurizing and denitrifying, it is characterized in that: the cyclone separator of described a plurality of tangential entries (12), its intake channel is comprised of a plurality of rotating liquid drop shape guide vanes, its exhaust core pipe outer wall is welded with downward-sloping spiral stream guidance fin, and exhaust core pipe bottom cone inwall is welded with a broken rotating plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320351081 CN203342648U (en) | 2013-06-19 | 2013-06-19 | Circulating fluid bed reactor realizing single-pipe internal circulating of absorbent and simultaneous desulfuration and denitration of smoke |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320351081 CN203342648U (en) | 2013-06-19 | 2013-06-19 | Circulating fluid bed reactor realizing single-pipe internal circulating of absorbent and simultaneous desulfuration and denitration of smoke |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984656A (en) * | 2015-06-23 | 2015-10-21 | 哈尔滨工业大学 | Multistage internal circulation semi-dry method desulfurization, denitrification and demercuration integrated device |
| CN117679950A (en) * | 2024-02-02 | 2024-03-12 | 北京中科润宇环保科技股份有限公司 | Anti-blocking dry deacidification ash circulating and returning device and working method |
-
2013
- 2013-06-19 CN CN 201320351081 patent/CN203342648U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104984656A (en) * | 2015-06-23 | 2015-10-21 | 哈尔滨工业大学 | Multistage internal circulation semi-dry method desulfurization, denitrification and demercuration integrated device |
| CN117679950A (en) * | 2024-02-02 | 2024-03-12 | 北京中科润宇环保科技股份有限公司 | Anti-blocking dry deacidification ash circulating and returning device and working method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20190619 |
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| CF01 | Termination of patent right due to non-payment of annual fee |