CN206325370U - Boiler of power plant tail gas SO3 removes system - Google Patents
Boiler of power plant tail gas SO3 removes system Download PDFInfo
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- CN206325370U CN206325370U CN201621340414.XU CN201621340414U CN206325370U CN 206325370 U CN206325370 U CN 206325370U CN 201621340414 U CN201621340414 U CN 201621340414U CN 206325370 U CN206325370 U CN 206325370U
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- power plant
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Abstract
The utility model belongs to atmosphere pollution and administers field, and in particular to a kind of boiler of power plant tail gas SO3Removing system.The system includes gas approach, sorbent injection device, SCR denitration reactor, SCR denitration exhanst gas outlet, cyclone separator, cyclone separator gas vent, ash releasing tube；The sorbent injection device is uniformly sprayed into absorbent in gas approach by multiple nozzles, and the sorbent injection device includes two parts：Part I is arranged on the pipe bent position of gas approach, and the injection direction of nozzle is identical with flow of flue gas direction, and Part II is set on the flue vertical with gas approach, and the injection direction of nozzle and flow of flue gas direction are perpendicular；Nozzle is set on the whirlwind top board of the cyclone separator, and nozzle spray direction is vertical with flue gas approach axis.System SO3Removal efficiency up to 97%~99%, effectively increase the service life of catalyst and air preheater.
Description
Technical field
The utility model belongs to atmosphere pollution and administers field, and in particular to a kind of boiler of power plant tail gas SO3Removing system.
Background technology
At present, thermoelectricity is still the generating main force of China, and thermal power plant coal can produce NO in combustionx、SO2、
SO3It is increasingly strict with national environmental standard Deng pollutant, the big pollutant of concentration of emission in coal-fired plant flue gas, such as
NOx、SO2, flue dust etc. obtained effective control, but the pollutant such as SO that some in flue gas exist on a small quantity3Deng not obtaining height but
The removing of effect.
SO3Toxicity be approximately SO210 times, easily combine to form H with water2SO4Acid mist, this acid mist spreads in an atmosphere
Serious destruction can be brought to the respiratory tract of people, while can also form acid rain, damage capability is very big.Because of SO in flue gas3Presence,
On the one hand the acid dew point of flue gas can be improved, boiler flue corrosion is caused to avoid sour gas from condensing in walling of flue, boiler row need to be improved
Temperature is put, causes boiler exhaust gas loss increase, boiler efficiency declines；On the other hand, when flue gas is by wet-type absorption tower, flue gas temperature
Degree is rapidly reduced, SO in flue gas3H is combined to form with water2SO4Mist droplet, and absorption tower is to H2SO4The removing ability of droplet is low,
Often there is " Lan Yu " phenomenon in chimney breast.
With the popularization of coal-burning power plant's SCR denitration system, in the presence of denitrating catalyst, 0.4%~1.6% there are about
SO2It is converted into SO3, add SO in flue gas3Concentration.SO3With vapor, NH3Reaction generation NH4HSO4And H2SO4, it is deposited on
The hydrogen-catalyst reactor and air preheater surfaces of SCR denitration system, cause catalyst failure and air preheater to block, so that
So that coal unit occurs that underload compels to move back, air preheater burn into catalyst life is short etc. one after SCR denitration device is installed
Series of problems, has a strong impact on coal-burning power plant's denitration efficiency and unit is normally run.
Therefore, absorbent consumption can effectively be reduced by being badly in need of exploitation one kind, operating cost be reduced, at utmost to reduce cigarette
The concentration of sulfur trioxide in gas, realizes and is reducing coal-burning power plant SO2、NOxWithout producing newly big while discharge with particulate matter PM
Gas pollution and the boiler of power plant tail gas SO of plant issue3Removing system.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of boiler of power plant tail gas SO3Removing system, the system
Including gas approach, sorbent injection device, SCR denitration reactor, SCR denitration exhanst gas outlet, cyclone separator, cyclonic separation
Device gas vent, ash releasing tube；The sorbent injection device is uniformly sprayed into absorbent in gas approach by multiple nozzles, institute
Stating sorbent injection device includes two parts：Part I is arranged on the pipe bent position of gas approach, and the injection side of nozzle
To identical with flow of flue gas direction, Part II is set on the flue vertical with gas approach, and the injection direction of nozzle and
Flow of flue gas direction is perpendicular；Nozzle is set on the whirlwind top board of the cyclone separator, and nozzle spray direction enters with flue gas
Direction is vertical.
Further, above-mentioned boiler of power plant tail gas SO3In removing system, the Part I 21 of the sorbent injection device
It is 100~150mm with the mounting distance of Part II 22.
Further, above-mentioned boiler of power plant tail gas SO3In removing system, in gas approach and cyclone separator gas vent
It is disposed with gas composition analysis detection means.
Further, above-mentioned boiler of power plant tail gas SO3In removing system, the absorbent in the sorbent injection device is
Liquid-absorbant.
Further, above-mentioned boiler of power plant tail gas SO3In removing system, set on the whirlwind top board of the cyclone separator
Nozzle, injection for dry powder, dry powder particle diameter is 30~100 μm.
The beneficial effects of the utility model are：The system reduces SO3Blocking to SCR denitration surface micropore,
Improve the service life of catalyst；Reduce SO3To the clog of SCR denitration device air preheater, air is added
The life-span of preheater；Simultaneously at utmost to reduce the concentration of sulfur trioxide in flue gas, SO is tested through applicant3Removal efficiency
Up to 97%~99%, effectively SO in reduction air3Content, solves the problem of pollutant emission is more in flue gas, improves ring
Border.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the utility model boiler of power plant tail gas SO3The structural representation of removing system；
Wherein, 1- gas approach；2- sorbent injection devices；21- sorbent injection device Part I；22- absorbents
Injection apparatus Part II；3-SCR Benitration reactors；4-SCR denitration exhanst gas outlets；5- cyclone separators；6- nozzles；7- whirlwind
Separator gas are exported；8- ash releasing tubes.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular
Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be only
Described for the ease of description the utility model and simplifying, rather than to indicate or imply that signified device or element must have specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the
One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
The utility model provides a kind of boiler of power plant tail gas SO3Removing system, the system includes gas approach 1, absorbed
Agent injection apparatus 2, SCR denitration reactor 3, SCR denitration exhanst gas outlet 4, cyclone separator 5, nozzle 6, cyclone separator gas
Outlet 7, ash releasing tube 8；The sorbent injection device 2 is uniformly sprayed into absorbent in gas approach 1 by multiple nozzles, described
Sorbent injection device 2 includes two parts：Part I 21 is arranged on the pipe bent position of gas approach 1, and the injection of nozzle
Direction is identical with flow of flue gas direction, and Part II 22 is set on the flue vertical with gas approach 1, and the injection side of nozzle
To perpendicular with flow of flue gas direction；Nozzle 6, the injection direction of nozzle 6 and cigarette are set on the whirlwind top board of the cyclone separator 5
Gas approach axis is vertical.
Further, above-mentioned boiler of power plant tail gas SO3In removing system, the Part I of the sorbent injection device 2
21 be 100~150mm with the mounting distance of Part II 22.
Further, above-mentioned boiler of power plant tail gas SO3In removing system, go out in gas approach 1 and cyclone separator gas
Mouth 7 is disposed with gas composition analysis detection means.
Further, above-mentioned boiler of power plant tail gas SO3In removing system, the absorbent in the sorbent injection device 2
For liquid-absorbant.
Further, above-mentioned boiler of power plant tail gas SO3In removing system, set on the whirlwind top board of the cyclone separator 5
The nozzle 6 put, injection for dry powder, dry powder particle diameter is 30~100 μm.
The utility model boiler of power plant tail gas SO3The operation principle of removing system is：The of the sorbent injection device 2
A part 21 and Part II 22 constitute SO3Absorber portion, nozzle spray direction and the flow of flue gas direction phase of Part I 21
Together, the nozzle spray direction of Part II 22 and flow of flue gas direction are perpendicular, and in fan-shaped spray shape, the absorbent energy of injection
Whole flue is enough covered, two parts form the space of one section of relative closure：Two parts absorbent flow direction is different, can promote
Enter being sufficiently mixed for flue gas and absorbent, so that beneficial to SO3Removing；And when flue gas is encountering Part II sorbent injection
The liquid level of formation, has part and turns back, can be to SO3Carry out secondary removing.Treat that alkali lye hydro-peening fully absorbs SO3, enter back into SCR
Reactor, the alkali lye after absorption is evaporated by flue gas drying.Reacted flue gas, through SCR denitration exhanst gas outlet, into cyclonic separation
Nozzle 6 is set on device 5, the whirlwind top board of cyclone separator 5, and the injection direction of nozzle 6 is vertical with flue gas approach axis, utilizes whirlwind
Air-flow in separator 5, is fully mixed flue gas with the dry powder that nozzle 6 sprays, and the SO produced is reacted to SCR3And entrance
Complete SO is not absorbed in flue3Fully absorb, while the Ammonium hydrogen sulfate solid of generation is excluded through ash releasing tube 8, remove SO3Afterwards
Flue gas through cyclone separator gas vent 7, into exhaust pass.
In summary, the boiler of power plant tail gas SO that the utility model is provided3Removing system reduces SO3SCR denitration is catalyzed
The blocking of agent surface micropore, improves the service life of catalyst；Reduce SO3Corruption to SCR denitration device air preheater
Erosion is blocked, and adds the life-span of air preheater；While at utmost to reduce SO in flue gas3Concentration, tested through applicant
SO3Removal efficiency up to 97%~99%, effectively reduction air in SO3Content, solves asking more than pollutant emission in flue gas
Topic, improves environment.
Finally it should be noted that：Above only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to foregoing embodiments, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from technical solutions of the utility model
Scope.
Claims (5)
1. boiler of power plant tail gas SO3Removing system, it is characterised in that the system includes gas approach (1), sorbent injection device
(2), SCR denitration reactor (3), SCR denitration exhanst gas outlet (4), cyclone separator (5), nozzle (6), cyclone separator gas
Export (7), ash releasing tube (8)；Absorbent is uniformly sprayed into gas approach by the sorbent injection device (2) by multiple nozzles
(1) in, the sorbent injection device includes two parts：Part I (21) is arranged on the pipe bent position of gas approach, and
The injection direction of nozzle is identical with flow of flue gas direction, and Part II (22) is set on the flue vertical with gas approach, and
The injection direction of nozzle and flow of flue gas direction are perpendicular；Nozzle (6) is set on the whirlwind top board of the cyclone separator (5),
Nozzle (6) injection direction is vertical with flue gas approach axis.
2. boiler of power plant tail gas SO according to claim 13Removing system, it is characterised in that the sorbent injection device
(2) Part I (21) is 100~150mm with Part II (22) mounting distance.
3. boiler of power plant tail gas SO according to claim 13Removing system, it is characterised in that in gas approach (1) and whirlwind
Separator gas outlet (7) is disposed with gas composition analysis detection means.
4. boiler of power plant tail gas SO according to claim 13Removing system, it is characterised in that the sorbent injection device
(2) absorbent in is liquid-absorbant.
5. according to any one of Claims 1 to 4 boiler of power plant tail gas SO3Removing system, it is characterised in that the whirlwind point
The nozzle (6) set on whirlwind top board from device (5), injection for dry powder, dry powder particle diameter is 30~100 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621340414.XU CN206325370U (en) | 2016-12-07 | 2016-12-07 | Boiler of power plant tail gas SO3 removes system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621340414.XU CN206325370U (en) | 2016-12-07 | 2016-12-07 | Boiler of power plant tail gas SO3 removes system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206325370U true CN206325370U (en) | 2017-07-14 |
Family
ID=59290489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621340414.XU Expired - Fee Related CN206325370U (en) | 2016-12-07 | 2016-12-07 | Boiler of power plant tail gas SO3 removes system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206325370U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406711A (en) * | 2018-10-17 | 2019-03-01 | 华电电力科学研究院有限公司 | A kind of device for absorbing tail gas and its tail gas absorption method for SCR denitration performance detection |
| CN110813062A (en) * | 2019-11-29 | 2020-02-21 | 河南省高新技术实业有限公司 | Biomass combustion waste gas treatment device |
-
2016
- 2016-12-07 CN CN201621340414.XU patent/CN206325370U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109406711A (en) * | 2018-10-17 | 2019-03-01 | 华电电力科学研究院有限公司 | A kind of device for absorbing tail gas and its tail gas absorption method for SCR denitration performance detection |
| CN110813062A (en) * | 2019-11-29 | 2020-02-21 | 河南省高新技术实业有限公司 | Biomass combustion waste gas treatment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170714 Termination date: 20201207 |