CN110404343A - Coal-fired flue gas SO3Aerosol removal system and method - Google Patents
Coal-fired flue gas SO3Aerosol removal system and method Download PDFInfo
- Publication number
- CN110404343A CN110404343A CN201910817770.8A CN201910817770A CN110404343A CN 110404343 A CN110404343 A CN 110404343A CN 201910817770 A CN201910817770 A CN 201910817770A CN 110404343 A CN110404343 A CN 110404343A
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- Prior art keywords
- gas
- aerosol
- coal
- flue
- removing tower
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- 239000003546 flue gas Substances 0.000 title claims abstract description 63
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000443 aerosol Substances 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000007789 gas Substances 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 238000005119 centrifugation Methods 0.000 claims description 51
- 239000007921 spray Substances 0.000 claims description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- 238000013459 approach Methods 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 8
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 235000019504 cigarettes Nutrition 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- 230000001174 ascending effect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract 4
- 125000006850 spacer group Chemical group 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000003344 environmental pollutant Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/18—Cleaning-out devices
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a coal-fired flue gas SO3The aerosol removing system and method have simple structure and reasonable design, and can realize SO removal of coal-fired flue gas3And the low-cost and high-efficiency removal of the aerosol. The system comprises an inlet flue, an outlet flue and a plurality of centrifugal removal towers which are arranged in parallel; the centrifugal removal tower comprises an inner cylinder, an outer cylinder and ascending threads, wherein the inner cylinder and the outer cylinder are concentrically sleeved with each other, the ascending threads are arranged on the spacer layers on the side walls of the inner cylinder and the outer cylinder, and the ascending threads divide the spacer layers into a plurality of thread centrifugal channels; the top and the bottom of the inner cylinder are respectively arranged at intervals on the outer cylinder, the top forms a spraying gas collecting chamber at intervals, and the bottom forms a gas inlet and liquid collecting chamber at intervals; the top of the inner cylinder is provided with a cleaning water spraying device positioned in the spraying gas collecting chamber, and the bottom of the outer cylinder is provided with a cleaning water discharging pipeline communicated with the gas inlet and liquid collecting chamber; the inlet ends of the outlet flue and the threaded centrifugal channel are respectively communicated with the air inlet liquid collecting chamber, and the inlet flue and the threaded centrifugal channel are communicated with the air inlet liquid collecting chamberThe outlet end of the core channel is respectively communicated with the spraying gas-collecting chamber.
Description
Technical field
The present invention relates to smoke gas treatment technical field, specially a kind of coal-fired flue-gas SO3Aerosol removes system and method.
Background technique
As pollutant emission requirement is gradually increased in country, particulate matter, the SO of power plant emission2, the pollutants such as NOx
Discharge has obtained effective control, but there is no thoroughly improve the phenomenon that atmospheric haze.The main pollution of power plant emission
Object is SO2, NOx, flue dust, but in addition to this there are also a small amount of aerosol and SO3Droplet.It puts into operation in fume environment protection facility
Afterwards, there is opaque plume or the coloured plume of blue/yellowish-brown in part thermal power plant smoke evacuation, produces visual pollution.Due to existing
There is SCR catalyst in environmental protection facility to will lead to the SO of part2It is converted into SO3, SO3It is reacted with water and generates sulfuric acid and in flue-gas temperature
Lower than sulfuric acid droplet is generated after acid dew point, the droplet after sulfuric acid droplet itself or absorption surrounding moisture increases containing for aerosol
Amount.When the submicron particles ratio grown up in flue gas aerosol is higher, Mie scattering can be generated, the scattering process to light
Enhancing, at this time it can be seen that dense opaque white color plume；When aerosol sub-micron grade particles are less, and with high-content,
When more tiny nano-scale particle is main, particle is much smaller than visible wavelength, then Rayleigh scattering can be generated, although plume is not at this time
Light transmission, but it is stronger to the scattering process of blue light, and yellowish-brown is presented after penetrating plume in light, and other angles are then able to observe that
Blue, therefore also it is able to observe that more apparent transparent plume.
Although SO in the flue gas of discharge3Droplet and other aerosol loads are few, but seriously endanger ecological environment and
The health of the mankind.Existing environmental protection equipment is very low to such pollutant removing efficiency, the aerosol especially in partial size less than 1 μm and
Droplet, the pollutant of these discharges are therefore the important component of atmosphere pollution and haze researches and develops a kind of Novel flue gas droplet
The removing equipment of aerosol is of great significance.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of coal-fired flue-gas SO3Aerosol removes system and side
Method, structure is simple, and design rationally, can be realized to coal-fired flue-gas SO3It is removed with the low-cost high-efficiency of aerosol.
The present invention is to be achieved through the following technical solutions:
A kind of coal-fired flue-gas SO3Aerosol removes system, including gas approach, exhaust pass and multiple is arranged in parallel centrifugation
Removing tower；
The centrifugation removing tower includes the inner barrel and outer barrel being arranged with one heart, and is arranged in inner cylinder and outer tube side wall interval
The rising screw thread of layer rises screw thread for wall and is divided into several screw thread centrifugal channels；It is in respectively at outer cylinder at the top and bottom of inner cylinder
Interval setting, head clearance form spray gas collection chamber, and bottom interval forms air inlet liquid collecting chamber；It is provided with and is located at the top of inner cylinder
The indoor cleaning water spray system of air collecting chamber is sprayed, outer cylinder bottom is provided with the cleaning water discharge pipe with air inlet liquid collecting chamber
Road；
The input end of exhaust pass and screw thread centrifugal channel respectively with air inlet liquid collecting chamber, gas approach and screw thread from
The outlet end in heart channel respectively with spray gas collection chamber.
Preferably, the screw thread centrifugal pipeline is using screw thread, channel cross-section are square clockwise or counterclockwise.
Preferably, the screw thread centrifugal pipeline is using multi-channel parallel centrifugation removing.
Preferably, inlet porting flue gas sieves between the gas approach and the air inlet liquid collecting chamber of multiple centrifugation removing towers
Plate enters flue gas for dividing equally.
Preferably, exiting flue gas sieve plate is arranged in the outlet of the exhaust pass, for adjusting flue gas flow field.
Preferably, multiple be arranged in parallel in centrifugation removing tower is at least arranged a centrifugation removing tower and does not work, as spare.
A kind of coal-fired flue-gas SO3Aerosol removal methods, based on removing system described in above-mentioned any one, including it is as follows
Step,
Step 1, using the spare form of more one centrifugation removing towers of centrifugation removing tower operation, flue gas is entered by gas approach
Afterwards, the centrifugation removing tower of each operation is entered after dividing equally by inlet flue gas sieve plate；
Step 2, flue gas is rotated by spiral centrifugal channel and is risen in the centrifugation removing tower of operation, by sulfuric acid droplet and gas
Colloidal sol is adhered to the wall surface of centrifugation removing tower under the influence of centrifugal force；
Step 3, the neat stress after removing converge at exhaust pass, enter after adjusting flow field by exiting flue gas sieve plate
Chimney；
Step 4, spare centrifugation removing tower starting operation, any one closing entrance of the centrifugation removing tower run before go out
Mouthful, flushing water is poured by the flushing sprinkler head of cleaning water spray system, the acid solution adhered on wall surface and aerosol are washed down, and by
The discharge of ejected wash water discharge line.
Preferably, in step 2 and three, the flue gas after distribution enters air inlet liquid collecting chamber, exists respectively through spiral centrifugal channel
The wall surface of centrifugation removing tower is adhered under the action of centrifugal force, to coal-fired flue-gas SO3Aerosol is removed, the net cigarette after removing
Gas is discharged after spray gas collection chamber converges by exhaust pass.
Preferably, in step 4, flushing water pours into spray gas collection chamber, respectively through spiral centrifugal channel in gravity and pressure
Effect is lower to rinse the acid solution adhered on wall surface and aerosol, is discharged after air inlet liquid collecting chamber converges by ejected wash water discharge line.
Preferably, once purged centrifugation removing tower is as spare centrifugation removing tower, remaining centrifugation removing tower is as operation
Centrifugation removing tower, repeat step 1 to four, to coal-fired flue-gas SO3Aerosol is continuously removed.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention is by centrifugation removing tower, so that the centrifugation of flue gas high speed rotation makes SO3Droplet and aerosol are adsorbed on centrifugation
Removing tower wall surface can be rinsed the aerosol and droplet of absorption using ejected wash water, by cigarette by cleaning water spray system
The SO removed is difficult in gas3It is dissolved in water with aerosol, and is sent into desulphurization system and is further processed；It is simple and efficient, safety
Environmental protection, can be to coal-fired flue-gas SO3Low-cost high-efficiency removing is carried out with aerosol.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of present system.
In figure: 1 gas approach, 2 centrifugation removing towers, 3 centrifugal channels, 4 cleaning water spray systems, 5 exhaust pass, 6 cleanings
Water discharge pipe road.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
A kind of coal-fired flue-gas SO of the present invention3Aerosol removes system, including gas approach 1, is centrifuged removing tower 2, and centrifugation is logical
Road 3 cleans water spray system 4, exhaust pass 5 and ejected wash water discharge line 6.Removal methods of the present invention pass through flue gas height
Fast rotating centrifugal makes SO3Droplet and aerosol are adsorbed on removing equipment wall surface, then reuse ejected wash water flushing, will be difficult in flue gas
With the SO of removing3It is dissolved in water with aerosol, and is sent into desulphurization system and is further processed.
As shown in Figure 1, the system comprises the centrifugation for the aerosol being connected by gas approach 1 with back-end ductwork removings
Tower 2, the cleaning water spray system 4 for the aerosol being connected with centrifugation removing tower 2, the gas being connected with centrifugation 2 bottom of removing tower
The ejected wash water discharge line 6 of colloidal sol.
The centrifugation removing tower 2 is that multiple groups single column is in parallel, and each single column is respectively entered after flue gas, is converged by top flue
After be discharged.SO in flue gas is removed using rotating centrifugal high efficiency by centrifugation removing tower 23With aerosol.It specifically can be used two
It is standby to open one by being sent into each tower after gas approach 1 respectively flue gas more for the multitower of tower or more；In this preferred embodiment, simultaneously using three towers
Connection, two to open one standby.
Centrifugal channel in the centrifugation removing tower 2 is using more thread helix ascending manners channel, and channel cross-section is pros
Shape, inside and outside wall are two concentric drums, and wall is divided into multiple centrifugal channels using rising screw thread in the wall of cylinder；Spiral shell
Line centrifugal pipeline is using screw thread clockwise or counterclockwise, multi-channel parallel centrifugation removing.
The cleaning water spray system 4 is arranged at the top of removing tower, is sprayed, is sprayed water with high pressure using clear water, and ejected wash water is from spiral shell
It flow to bottom at the top of line centrifugal channel, realizes that ejected wash water is flowed out from centrifugal channel, after removing tower bottom converges, by described
6 discharge system of ejected wash water discharge line.
Ejected wash water is discharged into desulphurization system, main component in ejected wash water by the ejected wash water discharge line after the aerosol cleaning
For micro sulfuric acid and inorganic salts, handled together with desulfurization wastewater.
Method of the present invention is reduced for coal-fired flue-gas tail portion smoke temperature, after desulfurizing tower smoke temperature be down to 70 DEG C hereinafter,
A small amount of acid mist and aerosol are produced in flue gas at this time, these particle sizes are minimum, it is difficult to be desulfurized system absorption, still
Itself stickiness is higher, and larger by centrifugal force effect, therefore designs centrifugal channel removing tower, and acid mist and aerosol are in centrifugal force
Under the action of be adhered to channel outer wall, then bur is washed down by ejected wash water, is finally located in desulfurization water treatment system again
Reason is fallen.
Specifically, a kind of coal-fired flue-gas SO of the present invention3Aerosol removal methods, comprising the following steps:
Step 1, the removing tower form spare using three centrifugation removing tower 2 operations, one centrifugation removing tower 2, flue gas is by entrance
After flue 1 enters removing system, enter each single column after dividing equally by inlet flue gas sieve plate；
Step 2, flue gas is risen by the spiral centrifugal channel rotation of ring dress in centrifugation removing tower 2, and sulfuric acid droplet and gas is molten
Glue gets rid of the wall surface in removing tower under the influence of centrifugal force；
Step 3, the neat stress after removing converge at exhaust pass 5, are sieved after flowing plate adjusts flow field by flue gas and enter cigarette
Chimney；
Step 4, stand-by still starting operation, the wherein centrifugation removing tower 2 originally run close inlet port baffle, by
The flushing sprinkler head of cleaning water spray system 4 pours into flushing water, the acid solution adhered on wall surface and aerosol is washed down, and by cleaning
Water discharge pipe road 6 is discharged into desulphurization system.
The present invention builds pilot plant test platform in Jiangxi power plant 600MW unit, builds bypass flue in back-end ductwork and takes
1000m3The former flue gas of/h, with system and method provided by the present invention, to the SO in bypass flue gas3It is centrifuged with aerosol
Removing, detects SO3Concentration reduces by 95.3%, PM2.5Aerosol reduces 83.4%.Further illustrate system and side of the invention
Method is to coal-fired flue-gas tail portion SO3It is very significant with the removal effect of aerosol.
Claims (10)
1. a kind of coal-fired flue-gas SO3Aerosol removes system, which is characterized in that including gas approach (1), exhaust pass (5) and more
It is a to be arranged in parallel centrifugation removing tower (2)；
The centrifugation removing tower (2) includes the inner barrel and outer barrel being arranged with one heart, and is arranged in inner cylinder and outer tube side wall interval
The rising screw thread of layer rises screw thread for wall and is divided into several screw thread centrifugal channels；It is in respectively at outer cylinder at the top and bottom of inner cylinder
Interval setting, head clearance form spray gas collection chamber, and bottom interval forms air inlet liquid collecting chamber；It is provided with and is located at the top of inner cylinder
The indoor cleaning water spray system (4) of air collecting chamber is sprayed, outer cylinder bottom is provided with arranges with the ejected wash water of air inlet liquid collecting chamber
Pipeline (6) out；
The input end of exhaust pass (5) and screw thread centrifugal channel respectively with air inlet liquid collecting chamber, gas approach (1) and screw thread
The outlet end of centrifugal channel respectively with spray gas collection chamber.
2. a kind of coal-fired flue-gas SO according to claim 13Aerosol remove system, which is characterized in that the screw thread from
Heart pipeline is using screw thread, channel cross-section are square clockwise or counterclockwise.
3. a kind of coal-fired flue-gas SO according to claim 13Aerosol remove system, which is characterized in that the screw thread from
Heart pipeline is using multi-channel parallel centrifugation removing.
4. a kind of coal-fired flue-gas SO according to claim 13Aerosol removes system, which is characterized in that the entrance cigarette
Inlet porting flue gas sieve plate between road (1) and the air inlet liquid collecting chamber of multiple centrifugations removing tower (2) enters flue gas for dividing equally.
5. a kind of coal-fired flue-gas SO according to claim 13Aerosol removes system, which is characterized in that the outlet cigarette
Exiting flue gas sieve plate is arranged in the outlet in road (5), for adjusting flue gas flow field.
6. a kind of coal-fired flue-gas SO according to claim 13Aerosol removes system, which is characterized in that multiple to be arranged in parallel
A centrifugation removing tower (2) is at least arranged in centrifugation removing tower (2) not work, as spare.
7. a kind of coal-fired flue-gas SO3Aerosol removal methods, which is characterized in that based on as claimed in any one of claims 1 to 6 de-
Except system, include the following steps,
Step 1, using the spare form of more one centrifugations removing tower (2) of centrifugation removing tower (2) operation, flue gas is by gas approach (1)
After, the centrifugation removing tower (2) of each operation is entered after dividing equally by inlet flue gas sieve plate；
Step 2 is rotated by spiral centrifugal channel in centrifugation removing tower (2) the interior flue gas of operation and is risen, and sulfuric acid droplet and gas is molten
Glue is adhered to the wall surface of centrifugation removing tower (2) under the influence of centrifugal force；
Step 3, the neat stress after removing converge at exhaust pass (5), enter cigarette after adjusting flow field by exiting flue gas sieve plate
Chimney；
Step 4, spare centrifugation removing tower (2) starting operation, any one closing entrance of the centrifugation removing tower (2) run before
Outlet, pours into flushing water by the flushing sprinkler head of cleaning water spray system (4), the acid solution adhered on wall surface and aerosol is washed
Under, and be discharged by ejected wash water discharge line (6).
8. a kind of coal-fired flue-gas SO according to claim 73Aerosol removal methods, which is characterized in that step 2 and three
In, the flue gas after distribution enters air inlet liquid collecting chamber, is adhered to centrifugation under the influence of centrifugal force through spiral centrifugal channel respectively
The wall surface of removing tower (2), to coal-fired flue-gas SO3Aerosol is removed, and the neat stress after removing converges in spray gas collection chamber
It is discharged afterwards by exhaust pass (5).
9. a kind of coal-fired flue-gas SO according to claim 73Aerosol removal methods, which is characterized in that in step 4, punching
Wash water pours into spray gas collection chamber, rinses the acid solution adhered on wall surface under gravity and pressure effect through spiral centrifugal channel respectively
And aerosol, it is discharged after air inlet liquid collecting chamber converges by ejected wash water discharge line (6).
10. a kind of coal-fired flue-gas SO according to claim 73Aerosol removal methods, which is characterized in that once purged
It is centrifuged removing tower (2) and is used as spare centrifugation removing tower (2), remaining the centrifugation removing tower (2) of centrifugation removing tower (2) as operation,
Step 1 is repeated to four, to coal-fired flue-gas SO3Aerosol is continuously removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910817770.8A CN110404343A (en) | 2019-08-30 | 2019-08-30 | Coal-fired flue gas SO3Aerosol removal system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910817770.8A CN110404343A (en) | 2019-08-30 | 2019-08-30 | Coal-fired flue gas SO3Aerosol removal system and method |
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| Publication Number | Publication Date |
|---|---|
| CN110404343A true CN110404343A (en) | 2019-11-05 |
Family
ID=68369904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910817770.8A Pending CN110404343A (en) | 2019-08-30 | 2019-08-30 | Coal-fired flue gas SO3Aerosol removal system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112843317A (en) * | 2021-02-07 | 2021-05-28 | 程永铿 | Disinfecting equipment and method for treating polluted gas in drainage system |
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