CN206508777U - SO3 system in a kind of utilization desulfurization wastewater removing boiler smoke - Google Patents
SO3 system in a kind of utilization desulfurization wastewater removing boiler smoke Download PDFInfo
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- CN206508777U CN206508777U CN201621325456.6U CN201621325456U CN206508777U CN 206508777 U CN206508777 U CN 206508777U CN 201621325456 U CN201621325456 U CN 201621325456U CN 206508777 U CN206508777 U CN 206508777U
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Abstract
The utility model is related to boiler flue gas purification technical field, discloses SO in a kind of removing boiler smoke using desulfurization wastewater3System, including：The desulfurization wastewater treatment system being connected with desulfurizing tower, liquid spraying system is removed with sulfur trioxide, wherein, the desulfurization wastewater treatment system, including the cyclone being sequentially connected with, neutralization device, settler, flocculation plant, clarifier, removing liquid configuration device, sulfur trioxide removing liquid is obtained to handle desulfurization wastewater successively progress.The metal ion and other impurities in after-treatment, reduction desulfurization wastewater are carried out by the desulfurization wastewater produced to desulfurizing tower, desulfurization wastewater removing SO is improved3Efficiency.In addition, diverse location sprays into desulfurization wastewater after treatment on flue, SO is done step-by-step3Removing, both solved diverse location because of SO3The problem of excessive concentration is brought, is also prevented from same position and sprays into excessive desulfurization wastewater, cause the problem of atomized drop can not evaporate.
Description
Technical field
The utility model is related to boiler flue gas purification technical field, and in particular to one kind removes boiler smoke using desulfurization wastewater
SO in gas3System.
Background technology
Rich coal resources in China, and coal fired power generation is reliable, technology maturation, and China is with coal fired power generation for a long time
It is used as the main source of energy resource supply.However, various environmental pollutions can be produced in the operation of coal-burning power plant, predominantly coal-fired cigarette
The atmosphere pollution that gas discharge is brought.Therefore, coal-burning power plant is generally using denitration, desulfurization and dust collecting process to the NO in flue gasX、
SO2And dust is controlled.
In traditional flue gas purifying technique, domestic coal-burning power plant generally carries out denitrating flue gas, but SCR using SCR techniques
Catalyst can be by the part SO in flue gas2Catalysis oxidation is SO3, further increase SO in flue gas3Concentration, so as to cause empty pre-
Device is blocked and the corrosion to back-end ductwork.The control of the Conventional pollutions such as the electrostatic precipitator and WFGD of traditional coal fired power plant is set
For to SO in flue gas3Removal efficiency is relatively low.And most widely used flue gas desulfurization technique --- Limestone-gypsum Wet Flue Gas Desulfurization Process skill
Art, periodically discharges a large amount of waste water (i.e. desulfurization wastewater) in the process of running, and the waste water suspension, salt and content of beary metal are high and rotten
Corrosion is strong, need to be by processing ability qualified discharge.With the raising of contamination control standard, day is put in desulfurization wastewater zero-emission
Journey, and simple waste water zero discharge treatment process undoubtedly adds thermal power plant's operating cost.
At present, for Desulphurization for Coal-fired Power Plant waste water and SO3Deng the control of pollutant, often only Single Pollution thing is carried out
Processing.However, coal-burning power plant's pollutant catabolic gene process-intensive, equipment are numerous and jumbled, how to carry out many pollution joint removings is coal-fired electricity
The research emphasis of factory's pollutant control.
Therefore, Chinese patent literature CN203030173U, which discloses chlorine element in a kind of coal, recycles realization pollution Internet of Things
The device of removing is closed, it adds highly basic and returned in desulfurization wastewater and is sprayed onto in boiler smoke, to remove the mercury and SO in flue gas3,
But the alkaline desulfurization wastewater that the device is produced is for solidliquid mixture or containing partial flocculation thing, and its atomizing effect is poor, easily blocks mist
Change nozzle, so as to cause SO3Removal efficiency is relatively low；Furthermore, substantial amounts of heavy metal ion is contained in desulfurization wastewater, progress is not processed
Denitration, can cause SCR catalyst to be poisoned, and influence the effect of denitrating flue gas, and heavy metal ion and highly basic formation precipitation are easy
Cause atomizer to block, cause spraying uneven.
In addition, Chinese patent literature CN105126561A also discloses a kind of coal-fired cigarette based on desulfurization wastewater evaporation process
Gas PM2.5/SO3/ Hg combines removal methods.Specifically, adding what is be made up of high polymer cemented dose and wetting agent in desulfurization wastewater
Chemical agglomeration agent, sprays into flue, to realize PM2.5/SO3/ Hg joint removing, but this method in desulfurization wastewater by adding
Plus the chemical agglomeration agent being made up of high polymer cemented dose and wetting agent, not only increase removing PM2.5/SO3/ Hg cost, it is heavier
Want, chemical agglomeration agent is to SO3There is no specific absorption, removal efficiency is low.
Utility model content
Technical problem to be solved in the utility model is that existing desulfurization wastewater heavy metal ion content is high, SO3Removing effect
Rate is low, and SCR catalyst activity weakens, the problem of denitration effect is poor.
In order to solve the above technical problems, the technical solution adopted in the utility model is as follows：
The utility model provides SO in a kind of removing boiler smoke using desulfurization wastewater3System, including with desulfurizing tower phase
The desulfurization wastewater treatment system of connection, and sulfur trioxide removing liquid spraying system, wherein,
The desulfurization wastewater treatment system, including be sequentially connected with cyclone, neutralize device, settler, flocculation plant,
Clarifier, removing liquid configuration device, sulfur trioxide removing liquid is obtained to handle desulfurization wastewater successively progress；
The sulfur trioxide removes liquid spraying system, including removing liquid transfer pipeline and the spray being arranged in boiler flue
Head, the entrance point of the removing liquid transfer pipeline is connected with the removing liquid configuration device, the removing liquid transfer pipeline
The port of export is connected with the shower nozzle, to the sulfur trioxide removing liquid sprinkling that will be obtained after removing liquid configuration device processing
To boiler flue.
Optionally, the desulfurizing tower is connected with the afterbody of boiler flue, to receive boiler smoke and it is taken off
Sulphuring treatment；Along the flow direction of boiler smoke, economizer, SCR reactors, air preheater are disposed with the boiler flue
And electric dust collector.
Optionally, it is provided with the first shower nozzle between the economizer and the SCR reactors.
Optionally, it is provided with the second shower nozzle between the SCR reactors and the air preheater.
Optionally, the 3rd shower nozzle is provided between the air preheater and the electric dust collector.
Optionally, the 4th shower nozzle is provided between the electric dust collector and the desulfurizing tower.
Optionally, the clarifier is also associated with plate and frame filter press, will be deposited on the clarifier bottom
Flocculate carries out press filtration.
Optionally, the neutralization device, settler, flocculation plant and removing liquid configuration device are respectively arranged with dosing dress
Put, to add processing of the corresponding chemicals realization to waste water.
Optionally, the neutralization device, settler, flocculation plant and removing liquid configuration device are respectively arranged with stirring dress
Put, to be stirred to waste water and the chemicals added, realization is sufficiently mixed to waste water and chemicals.
Optionally, the desulfurizing tower is additionally provided with fume extractor, to discharge the boiler smoke after being handled through the desulfurizing tower
Gas.
Above-mentioned technical proposal of the present utility model has advantages below：
1st, the utility model embodiment provides SO in a kind of removing boiler smoke using desulfurization wastewater3Method, including：With
The desulfurization wastewater treatment system that desulfurizing tower is connected, and sulfur trioxide removing liquid spraying system, wherein, the desulfurization wastewater processing
System, including be sequentially connected with cyclone, neutralize device, settler, flocculation plant, clarifier, removing liquid configuration device,
Sulfur trioxide removing liquid is obtained to handle desulfurization wastewater successively progress；The sulfur trioxide removes liquid spraying system, including
Removing liquid transfer pipeline and the shower nozzle being arranged in boiler flue, the entrance point of the removing liquid transfer pipeline and the removing liquid
Configuration device is connected, and the port of export of the removing liquid transfer pipeline is connected with the shower nozzle, will match somebody with somebody by removing liquid
The sulfur trioxide removing liquid obtained after device processing is put to be sprayed in boiler flue.By entering to the desulfurization wastewater that desulfurizing tower is produced
Heavy metal ion and other impurities in row after-treatment, desulfurization wastewater of the reduction from desulfurizing tower, improve desulfurization wastewater removing
SO3Efficiency.
In addition, by the desulfurization wastewater of diverse location penetrating after treatment on flue, SO is done step-by-step3Removing,
Not only solve sulfur removal technology in diverse location because of SO3The problem of excessive concentration is brought, is also prevented from same position and sprays into excessively
Desulfurization wastewater, causes the problem of atomized drop can not evaporate；Zero-emission and the Combined Treatment of desulfurization wastewater are also achieved simultaneously
Remove SO3。
2nd, the utility model embodiment provides SO in a kind of removing boiler smoke using desulfurization wastewater3System, atomization spray
Mouth is arranged between SCR reactors and economizer, because desulfurization wastewater contains higher chlorion, is sprayed into before SCR reactors, cigarette
Temperature degree is higher, can preferably promote mercury element to be converted into mercury oxide, promotes absorption of the mercury oxide in desulfurizing tower.In addition,
There is minimum continuous spray ammonia temperature in SCR catalyst, and relevant with ammonium hydrogen sulfate generation in operation.When boiler load is low, cause
Exhaust gas temperature less than SCR it is minimum it is continuous spray ammonia temperature when, SCR device is out of service.Treated take off is sprayed into before SCR device
Sulphur waste water, can effectively reduce SO before SCR reactors3Concentration, improve it is minimum it is continuous spray ammonia temperature.
3. the utility model embodiment provides SO in a kind of removing boiler smoke using desulfurization wastewater3System, SCR device
Desulfurization wastewater after preceding penetrating processing effectively reduces SO in flue gas3Concentration, but flue gas pass through SCR reactors when, SCR catalyst
Can be by part SO in flue gas2It is oxidized to SO3, further lift the SO in flue gas3Concentration.SCR reactors are arranged in atomizer
Desulfurization wastewater between air preheater after position penetrating processing can prevent SO3The NH escaped with SCR device3Generate excess sulfuric acid
Hydrogen ammonium is blocked, corrosion air preheater, while being also prevented from SO3Corrosion air preheater itself.
4. the utility model embodiment provides SO in a kind of removing boiler smoke using desulfurization wastewater3System, removed in electricity
Dirt device and air preheater and atomizer is respectively arranged between desulfurizing tower, desulfurization of this position further after penetrating processing is given up
Water, is conducive to further reducing SO3Concentration, prevent it from corroding electrostatic precipitator and chimney.
Brief description of the drawings
In order that content of the present utility model is more likely to be clearly understood, below according to specific implementation of the present utility model
Example and with reference to accompanying drawing, the utility model is described in further detail, wherein：
Fig. 1 is the removing SO described in the utility model embodiment 13System process figure；
Reference is expressed as in figure：1- boilers, 2- economizers, 3-SCR reactors, 4- air preheaters, 5- electric dust collectors,
6- desulfurizing towers, 7- chimneys, 8- flues, the shower nozzles of 9- first, the shower nozzles of 10- second, the shower nozzles of 11- the 3rd, the shower nozzles of 12- the 4th, 13- eddy flows
Device, 14- neutralization ponds, 15- neutralization ponds chemicals dosing plant, 16- sedimentation basins, 17- sedimentation basins chemicals dosing plant, 18- flocculation basins, 19- flocculations
Pond chemicals dosing plant, 20- depositing reservoirs, 21- clear water reserviors, 22- clear water reserviors chemicals dosing plant, 23- plate and frame filter press, 24- agitating devices.
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.As long as in addition, technical characteristic involved in the utility model different embodiments disclosed below
Not constituting conflict each other can just be combined with each other.
Embodiment 1
The present embodiment provides SO in a kind of removing boiler smoke using desulfurization wastewater3System, as shown in figure 1, including：Pot
Stove 1, along the flow direction of boiler smoke, economizer 2, SCR reactors 3, air preheater 4, electricity is set gradually on boiler flue 8 and is removed
Dirt device 5, and boiler flue afterbody desulfurizing tower 6 and chimney 7 for smoke evacuation；Wherein, boiler smoke connects in desulfurizing tower 6
Receive, and desulfurization process is carried out to it.
Sulfur dioxide and a small amount of sulfur trioxide in desulfurizing tower removing flue gas, the desulfurization wastewater of generation pass through desulfurization tower bottom
It is cyclone 13 to connect in the separator set, the present embodiment, and the desulfurization wastewater that desulfurizing tower is produced is centrifuged, obtained
To desulfurated plaster and separating liquid.
The neutralization device that the separating liquid being centrifuged enters in desulfurization wastewater treatment system, wherein, neutralizing device includes
Neutralization pond 14, for storing centrate separating liquid；Neutralization pond chemicals dosing plant 15, for adding the first chemical agent；And stir
Device 24 is mixed, for fully mixing the separating liquid and the first chemical agent of addition that neutralize in device.Filled by neutralization pond dosing
Put 15, the one or more in addition quick lime, calcium hydroxide, caustic soda and sodium carbonate, using adjust the pH value of separating liquid as 9~
10, and precipitate most metal ion, such as Mg in separating liquid2+, Al3+, Fe3+, Zn2+, Cu2+, Ni2+, Cr3+Deng for its hydroxide
Thing is precipitated, and obtains the first waste water.As one embodiment of the present utility model, in the present embodiment, the first chemical agent of addition
For quick lime, the pH of regulation separating liquid is 9.0, obtains the first waste water.
The settler that first waste water outflow enters in desulfurization wastewater treatment system, wherein, settler includes sedimentation basin
16, for storing the first waste water；Sedimentation basin chemicals dosing plant 17, for adding sulfide precipitation agent；And agitating device 24, for filling
Divide and mix the first waste water and precipitating reagent, fully to precipitate other heavy metal ion therein, such as Hg2+, Cd2+.By sedimentation basin plus
One or more in medicine device 17, addition organic sulfur, vulcanized sodium, potassium sulfide and ferrous sulfide, fully to settle the first waste water
In Hg2+, Cd2+, obtain the second waste water.As one embodiment of the present utility model, in the present embodiment, the sulfide of addition
Precipitating reagent is organic sulfur TMT-15, and organic sulfur TMT-15 (15%wt) chemical feeding quantity is 0.275L/m3Waste water, obtains second and gives up
Water.
The flocculation plant that second waste water outflow enters in desulfurization wastewater treatment system, wherein, flocculation plant includes flocculation basin
18, for storing the second waste water；Flocculation basin chemicals dosing plant 19, for adding flocculant；And agitating device 24, for fully mixing
Second waste water and flocculant, to settle the suspension in the second waste water.By flocculation basin chemicals dosing plant 19, polyacrylamide is added
One or more in amine, aluminium polychloride, PAFC, fully to settle the suspension in the second waste water.It is used as this
In one embodiment of utility model, the present embodiment, the flocculant of addition is FeClSO4, FeClSO4With the ratio of the second waste water
For 150mg/m3。
Desulfurization wastewater after flocculation treatment enters being stood in depositing reservoir 20 for clarifier and clarified, the supernatant after clarification
Overflow enters removing liquid configuration device, wherein, removing liquid configuration device includes clear water reserviors 21, for storing after clarifying treatment
Clear liquid；Clear water reserviors chemicals dosing plant 22, for adding the second chemical agent；And agitating device 24, match somebody with somebody for fully mixing removing liquid
Put liquid and the second chemical agent in device.Pass through clear water reserviors chemicals dosing plant 22, the second chemical agent sodium carbonate of addition, bicarbonate
One or more in sodium, sodium hydrogensulfite, potassium carbonate, sodium acid carbonate and sodium hydrogensulfite, prepare sulfur trioxide and take off
Except liquid.As one embodiment of the present utility model, in the present embodiment, material is sodium hydrogensulfite, obtains sulfur trioxide removing
Liquid.
Desulfurization wastewater after flocculation treatment enters being stood in depositing reservoir 20 for clarifier and clarified, the solid-liquid mixing of generation
Thing enters plate and frame filter press 23 and carries out press filtration, and gained filtrate recycle is in neutralizing device, to adjust the separating liquid of the storage of neutralization pond 14.
Obtained sulfur trioxide removes liquid by the removing liquid transfer pipeline being connected with pH adjusting meanss, is delivered to setting
The first shower nozzle 9 between economizer 2 and SCR reactors 3, the second shower nozzle being arranged between SCR reactors 3 and air preheater 4
10th, the 3rd shower nozzle 11 that is arranged between air preheater 4 and electric dust collector 5 and it is arranged between electric dust collector 5 and desulfurizing tower 6
The 4th shower nozzle 12, sulfur trioxide removing liquid mist be sprayed in boiler flue 8, removing flue gas in sulfur trioxide, simultaneously promote
Enter the oxidation of element mercury.
By taking certain power plant 600WM units as an example, total exhaust gas volumn 2.16*106Nm3/ h, the yield of desulfurization wastewater is 6.75m3/
H, wherein the desulfurization wastewater sprinkling flow at the first shower nozzle 9, the second shower nozzle 10, the 3rd shower nozzle 11 and the 4th shower nozzle 12 is respectively
3m3/h、1.5m3/h、1.5m3/h、0.75m3/ h, spray droplet particle diameter is 20-50 μm.It is used as convertible reality of the present utility model
Apply the desulfurization wastewater at example, the first flusher 9, the second flusher 10, the 3rd flusher 11 and the 4th flusher 12
It can also be respectively 2.5m to spray flow3/h、2.5m3/h、1m3/h、0.75m3/ h, spray droplet particle diameter can also be 60-80 μ
M, can realize the purpose of this utility model, belong to protection domain of the present utility model.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among the protection domain that variation is created still in the utility model.
Claims (10)
1. one kind utilizes SO in desulfurization wastewater removing boiler smoke3System, including be connected with desulfurizing tower desulfurization wastewater processing
System, and sulfur trioxide removing liquid spraying system, it is characterised in that
The desulfurization wastewater treatment system, including be sequentially connected with cyclone, neutralize device, settler, flocculation plant, clarification
Device, removing liquid configuration device, sulfur trioxide removing liquid is obtained to handle desulfurization wastewater successively progress；
The sulfur trioxide removes liquid spraying system, including removing liquid transfer pipeline and the shower nozzle being arranged in boiler flue, institute
The entrance point for stating removing liquid transfer pipeline is connected with the removing liquid configuration device, the port of export of the removing liquid transfer pipeline
It is connected with the shower nozzle, the sulfur trioxide obtained after removing liquid configuration device processing removing liquid is sprayed into boiler
In flue.
2. SO in utilization desulfurization wastewater removing boiler smoke according to claim 13System, it is characterised in that it is described de-
Sulphur tower is connected with the afterbody of boiler flue, to receive boiler smoke and carry out desulfurization process to it；Along the stream of boiler smoke
Dynamic direction, is disposed with economizer, SCR reactors, air preheater and electric dust collector on the boiler flue.
3. SO in utilization desulfurization wastewater removing boiler smoke according to claim 23System, it is characterised in that the province
The first shower nozzle is provided between coal device and the SCR reactors.
4. SO in utilization desulfurization wastewater removing boiler smoke according to claim 33System, it is characterised in that it is described
The second shower nozzle is provided between SCR reactors and the air preheater.
5. SO in utilization desulfurization wastewater removing boiler smoke according to claim 43System, it is characterised in that the sky
The 3rd shower nozzle is provided between pre- device and the electric dust collector.
6. SO in boiler smoke is removed according to any described utilization desulfurization wastewaters of claim 2-53System, its feature exists
In being provided with the 4th shower nozzle between the electric dust collector and the desulfurizing tower.
7. SO in utilization desulfurization wastewater removing boiler smoke according to claim 63System, it is characterised in that it is described clear
Clear device is also associated with plate and frame filter press, the flocculate for being deposited on the clarifier bottom is carried out into press filtration.
8. SO in utilization desulfurization wastewater removing boiler smoke according to claim 73System, it is characterised in that in described
Chemicals dosing plant is respectively arranged with device, settler, flocculation plant and removing liquid configuration device, to add corresponding chemistry
Preparation realizes the processing to waste water.
9. SO in utilization desulfurization wastewater removing boiler smoke according to claim 83System, it is characterised in that in described
Agitating device is respectively arranged with device, settler, flocculation plant and removing liquid configuration device, to waste water and addition
Chemicals is stirred, and realization is sufficiently mixed to waste water and chemicals.
10. SO in utilization desulfurization wastewater removing boiler smoke according to claim 93System, it is characterised in that it is described
Desulfurizing tower is additionally provided with fume extractor, to discharge the boiler smoke after being handled through the desulfurizing tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621325456.6U CN206508777U (en) | 2016-12-05 | 2016-12-05 | SO3 system in a kind of utilization desulfurization wastewater removing boiler smoke |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621325456.6U CN206508777U (en) | 2016-12-05 | 2016-12-05 | SO3 system in a kind of utilization desulfurization wastewater removing boiler smoke |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621766A (en) * | 2016-12-05 | 2017-05-10 | 中国华电集团科学技术研究总院有限公司 | Method and system for removing SO3 from boiler flue gas by using desulfurization waste water |
| CN108051117A (en) * | 2018-01-16 | 2018-05-18 | 西安西热锅炉环保工程有限公司 | A kind of SCR denitration continuously sprays ammonia on-line temperature monitoring and control system and method |
| CN108383310A (en) * | 2018-03-19 | 2018-08-10 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of quenched desulfurization wastewater flue evaporation and cooperation-removal SO3Method |
| CN108051117B (en) * | 2018-01-16 | 2024-06-28 | 西安西热锅炉环保工程有限公司 | SCR denitration continuous ammonia injection temperature online monitoring and controlling system and method |
-
2016
- 2016-12-05 CN CN201621325456.6U patent/CN206508777U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106621766A (en) * | 2016-12-05 | 2017-05-10 | 中国华电集团科学技术研究总院有限公司 | Method and system for removing SO3 from boiler flue gas by using desulfurization waste water |
| CN108051117A (en) * | 2018-01-16 | 2018-05-18 | 西安西热锅炉环保工程有限公司 | A kind of SCR denitration continuously sprays ammonia on-line temperature monitoring and control system and method |
| CN108051117B (en) * | 2018-01-16 | 2024-06-28 | 西安西热锅炉环保工程有限公司 | SCR denitration continuous ammonia injection temperature online monitoring and controlling system and method |
| CN108383310A (en) * | 2018-03-19 | 2018-08-10 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of quenched desulfurization wastewater flue evaporation and cooperation-removal SO3Method |
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