CN206152599U - Coal -fired flue gas sulfur trioxide removing device - Google Patents
Coal -fired flue gas sulfur trioxide removing device Download PDFInfo
- Publication number
- CN206152599U CN206152599U CN201621128974.9U CN201621128974U CN206152599U CN 206152599 U CN206152599 U CN 206152599U CN 201621128974 U CN201621128974 U CN 201621128974U CN 206152599 U CN206152599 U CN 206152599U
- Authority
- CN
- China
- Prior art keywords
- flue
- coal
- spray gun
- sulfur trioxide
- alkaline absorbent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model relates to a coal -fired flue gas sulfur trioxide removing device, the device includes coarse fodder storehouse, screw batcher, air classification mill, thin feed bin, the weightless type batcher that connects gradually, and weightless type batcher lower part is connected with the trunk line, the trunk line is sent into to the air of forced draught blower after the blast dryer drying, adopt air conveying to come from the alkaline absorbent of weightless type batcher, main pipeline tail end is connected with the separator, the separator evenly divide into more branch with the trunk line, and a spray gun is connected to each branch road, the spray gun is evenly arranged on the flue cross -section to at the low reaches of spray gun flue installation static mixer, alkaline absorbent and flue gas homogeneous mixing that the assurance spray gun sprays. The utility model discloses according to the flue gas condition and the flue position of difference, select different types of alkaline absorbent, spray alkaline absorbent in to the flue through the spray gun and absorb the SO3 in the flue gas, reduce SO3 and to the harm of power plant's operation, realize SO3's minimum discharge.
Description
Technical field
This utility model belongs to atmosphere pollution Treatment process field, concretely relates to a kind of oxidation of coal-fired flue-gas three
Sulfur removing means.
Background technology
SO2And NOXIt is one of atmosphere pollution main in coal-fired plant flue gas, in order to reduce NOXDischarge, coal-fired electricity
Factory is mounted with SCR denitration device mostly.SCR catalyst there is a possibility that part SO2It is catalytically oxidized to SO3, add what is generated in stove
SO3, make SO3Finite concentration is reached, power plant is worked the mischief, for example, make catalyst poisoning, air preheater blocking, boiler flue corrosion etc..It is quiet
Electric cleaner and wet desulfuration tower are to SO3Removing it is limited in one's ability, SO3Be discharged in air and increase haze, cause environment
Pollution.In burning high sulfur coal, SO3The problem for causing is more serious.Realize SO3Deep removal, the safety economy of power plant is transported
The improvement of row and atmospheric environment is significant.
In order to reduce SO3The harm brought to power plant's operation and control SO3Discharge, it is at present many to spray using in flue
The method for entering alkaline absorbent.Chinese patent CN103055684A discloses a kind of utilization trona removing sulfur trioxide in flue gas
Device and technique, from SCR reactor outlet flue gas Jing trona serosity hydro-peening SO is absorbed3, enter back into air preheater；It is Chinese special
Sharp CN104857841A discloses a kind of device of sulfur trioxide in removing flue gas, including feed bin, screw(-type) feeder, ejecting gun,
Benitration reactor and spoiler etc., by spraying strong alkaline substance the SO before Benitration reactor is absorbed3；Chinese patent CN
104474897A discloses a kind of method of sulfur trioxide in removing coal-fired flue-gas, the flue to before denitrification apparatus entrance point
A certain amount of alkali grain is sprayed in flue gas in flue interior, between denitration outlet end and air preheater, by cigarette
Sulfur trioxide removing in gas.Although said method can to a certain degree control SO3Discharge, but can not successfully manage not
With the SO under flue gas condition3Removing, it is impossible to reach SO well3The requirement of minimum discharge.
Utility model content
For SO in coal-fired flue-gas3The problem of generation, the utility model proposes a kind of combustion suitable for different flue gas conditions
Flue-gas sulfur trioxide removing means.For the difference of different coal-fired plant flue gas conditions, the temperature, SO according to flue gas3It is dense
The conditions such as degree, atmosphere, in different flue positions alkaline absorbent, the SO in efficient removal flue gas are sprayed3, reduce SO3Power plant is set
Standby harm, reaches SO3The requirement of minimum discharge.
A kind of coal-fired flue-gas sulfur trioxide removing means, including flue, described device also includes being sequentially connected logical coarse fodder
Storehouse, screw batcher, air classification mill, fines storehouse, loss-in-weight feeders, main pipeline, separator and spray gun, the spray gun
It is arranged in flue, in the downstream flue of spray gun static mixer is disposed with；The main pipeline also passes through dried-air drier and send
Blower fan is connected.
This utility model Weight loss feeder bottom is connected with main pipeline, and the air of pressure fan is Jing after dried-air drier drying
Main pipeline is sent into, using the air conveying alkaline absorbent from Weight loss feeder；Main pipeline terminal is connected with separator, point
Main pipeline is uniformly divided into into multiple branch roads from device, each branch road connects a spray gun；Spray gun is evenly arranged in flue cross section, and
Static mixer is installed in the downstream flue of spray gun, it is ensured that the alkaline absorbent of lance ejection uniformly mixes with flue gas.According to not
Flue gas condition together and flue position, select different types of alkaline absorbent, and alkalescence absorption is sprayed in flue by spray gun
Agent absorbs the SO in flue gas3, reduce SO3Harm to power plant's operation, realizes SO3Minimum discharge.
Preferably, the main pipeline is connected by separator with several pipeline branch roads, each pipeline branch road is divided equally
It is not connected with corresponding spray gun.
Preferably, the fines storehouse is sealing device, and built with drying device, alkaline absorbent is prevented because of water suction
Reunion, fouling, blocking pipeline for causing etc..
Preferably, the quantity of the pipeline branch road is four.
Preferably, the position that alkaline absorbent is sprayed into is arranged between economizer and SCR reactors.
Preferably, the position that alkaline absorbent is sprayed into is arranged between SCR reactors and air preheater.
Preferably, the position that alkaline absorbent is sprayed into is arranged between air preheater and cleaner unit.
Preferably, the position that alkaline absorbent is sprayed into is arranged between cleaner unit and desulfurizing tower.
Characteristic of this utility model based on flue gas, selects different flue positions, and one is sprayed into flue using the device
The alkaline absorbent granule of quantitative and fineness, SO3It is removed with alkaline absorbent particle reaction, under the granule in flue gas passes through
The particulate removal equipment removing of trip.
Flue between economizer and SCR reactors, selects injection sodio class absorbent (Na2CO3, NaHCO3, it is natural
Alkali etc.)；Flue between SCR reactors and air preheater, selects injection magnesio class absorbent (MgO, Mg (OH)2, MgCO3Magnesium
Deng)；Flue between air preheater and cleaner unit, and the flue between cleaner unit and desulfurizing tower, select injection calcio class to absorb
Agent (CaO, Ca (OH)2, CaCO3Deng).During burning high sulfur coal, alkalescence is sprayed in the flue between economizer and SCR reactors and is inhaled
Receive agent removing SO3, reduce SO3Harm to catalyst；As the SO of SCR catalyst2/SO3When conversion ratio is higher, in SCR reactors
Alkaline absorbent removing SO is sprayed in flue between air preheater3, reduce harm of the generation of hydrogen sulfate ammonia to air preheater；When
Main purpose is to reduce SO3Discharge and during the corrosion to electric power factory equipment, alkalescence is sprayed in the flue before and after cleaner unit
Absorbent removes SO3。
The beneficial effects of the utility model are：
(1) main pipeline is uniformly divided into multiple branch roads by separator, and each branch road connects a spray gun；Spray gun is evenly arranged in
In flue cross section, and the downstream flue in spray gun installs static mixer, it is ensured that the alkaline absorbent of lance ejection is equal with flue gas
Even mixing；
(2) according to different flue gas conditions and flue position, suitable alkaline absorbent is selected, by removing specific flue
SO at position3, the blocking of denitrating catalyst and air preheater is effectively prevented, reduce SO3Harm to power plant's operation, and realize SO3
Minimum discharge.
Description of the drawings
Fig. 1 is structural representation of the present utility model；
1- coarse fodders storehouse, 2- screw batchers, 3- air classification mills, 4- fineves storehouse, 5- loss-in-weight feeders, 6- air-supplies
Machine, 7- dried-air driers, 8- main pipelines, 9- separators, 10- pipeline branch roads, 11- spray guns, 12- static mixers, 13- flues.
Specific embodiment
Below in conjunction with the accompanying drawings the utility model is described in further detail with specific embodiment, but claimed by this utility model
Scope be not limited to this.
Embodiment 1
With reference to Fig. 1, a kind of coal-fired flue-gas sulfur trioxide removing means, including flue 13, described device also includes sequentially phase
The coarse fodder storehouse 1 of connection, screw batcher 2, air classification mill 3, fines storehouse 4, loss-in-weight feeders 5, main pipeline 8, separator 9
With spray gun 11, the spray gun 11 is arranged in flue 13, and in the downstream flue of spray gun 11 static mixer 12 is disposed with；The master
Pipeline 8 is also connected by dried-air drier 7 with pressure fan 6.
The main pipeline 8 is connected by separator 9 with several pipeline branch roads 10, each pipeline branch road respectively with phase
Spray gun 11 is answered to be connected；The quantity of the pipeline branch road is four.The fines storehouse is sealing device, and is filled built with being dried
Put, prevent reunion, fouling, blocking pipeline that alkaline absorbent causes because of water suction etc..
SO before removing SCR in flue3, flue position is located between economizer and SCR reactors.400 DEG C of flue-gas temperature,
SO3Concentration 25ppm.According to the flue gas condition at this, trona (Na is selected2CO3·NaHCO3·2H2O it is natural) as absorbent
Alkali and SO3Mol ratio be 2: 1.Trona coarse fodder mean diameter is 2mm, and fines mean diameter is defined as 40 μm.
As shown in figure 1, during system operation, substantial amounts of trona coarse fodder is stored in coarse fodder storehouse 1, mean diameter is 2mm.Slightly
The bottom of feed bin 1 is connected with screw batcher 2；Coarse grained trona is sent into into air classification mill using screw batcher 2
3, trona is milled to into 40 μm of mean diameter, it is re-fed into standby in fines storehouse 4, fines storehouse is sealing device, and is provided with dry dress
Put, prevent reunion, fouling, blocking pipeline that alkaline absorbent causes because of water suction etc.；Fines storehouse 4 is connected with loss-in-weight feeders 5,
Delivery rate is controlled using loss-in-weight feeders 5, trona and SO is reached3Mol ratio be 2：1；The bottom of loss-in-weight feeders 5
The main pipeline 8 of connection conveying absorbent；Conveyed from loss-in-weight feeders 5 by the way of air conveying in main pipeline 8
Thin trona granule；The wind that pressure fan 6 is produced first passes through air drier 7 and is dried, to prevent trona particulate water absorbent from reuniting, blocking up
Plug pipeline；The thin trona granule of main pipeline 8 first delivers to separator 9, and using separator, 9 points is four pipeline branch roads 10, each
Pipeline branch road is connected with corresponding spray gun 11；Alkaline absorbent granule sprays from spray gun 11, forward flows with flue gas；In spray gun
Arrangement static mixer 12 in the flue of downstream, it is ensured that alkaline absorbent and flue gas uniformly mix, alkaline absorbent granule and flue gas
In SO3Sulfate is formed after reaction and be removed.
Under the conditions of design conditions, it is ensured that SO3Removal efficiency 90%, simultaneously because spray into trona account for flue gas
Flying dust total amount mass ratio is less than 0.5%, therefore will not produce considerable influence to the SCR catalyst in downstream.
Embodiment 2
The present embodiment is to remove the SO before air preheater in flue with the difference of embodiment 13, it is anti-that flue position is located at SCR
Answer between device and air preheater.250 DEG C of flue-gas temperature, SO3Concentration 40ppm.According to the flue gas condition at this, Mg (OH) is selected2As
Absorbent, Mg (OH)2With SO3Mol ratio is 4：1.Mg(OH)2Coarse fodder particle diameter is 3mm, and fines mean diameter is defined as 60 μm.
Under the conditions of design conditions, it is ensured that SO3Removal efficiency 84%.Effectively prevent the blocking and corruption of air preheater
Erosion.
Embodiment 3
The present embodiment is to remove the SO in front flue of dust collector with the difference of embodiment 13, it is empty that flue position is located at SCR
Between pre- device and cleaner unit.150 DEG C of flue-gas temperature, SO3Concentration 30ppm.According to the flue gas condition at this, Ca (OH) is selected2As
Absorbent, Ca (OH)2With SO3Mol ratio is 6：1.Ca(OH)2Coarse fodder mean diameter is 4mm, and fines mean diameter is defined as 50 μ
m。
Under the conditions of design conditions, it is ensured that SO3Removal efficiency 85%.Effectively prevent cleaner unit and upstream device
Corrosion.
Embodiment 4
The present embodiment is to remove the SO before desulfurizing tower in flue with the difference of embodiment 13, flue position is removed positioned at SCR
Between dirt device and desulfurizing tower.90 DEG C of flue-gas temperature, SO3Concentration 15ppm.According to the flue gas condition at this, Ca (OH) is selected2As
Absorbent, Ca (OH)2With SO3Mol ratio is 3：1.Ca(OH)2Coarse fodder mean diameter is 4mm, and fines mean diameter is defined as 40 μ
m。
Under the conditions of design conditions, it is ensured that SO3Removal efficiency 80%.Effectively prevent desulfurizing tower corrosion and can
See the generation of plume.
Claims (8)
1. a kind of coal-fired flue-gas sulfur trioxide removing means, including flue, it is characterised in that：Described device also includes being sequentially connected
Logical coarse fodder storehouse, screw batcher, air classification mill, fines storehouse, loss-in-weight feeders, main pipeline, separator and spray gun, institute
State spray gun to be arranged in flue, in the downstream flue of spray gun static mixer is disposed with；The main pipeline is also by being air-dried
Machine is connected with pressure fan.
2. coal-fired flue-gas sulfur trioxide removing means according to claim 1, it is characterised in that：The main pipeline is by dividing
It is connected with several pipeline branch roads from device, each pipeline branch road is respectively connected with corresponding spray gun.
3. coal-fired flue-gas sulfur trioxide removing means according to claim 1, it is characterised in that：The fines storehouse is sealing
Device, and built with drying device.
4. coal-fired flue-gas sulfur trioxide removing means according to claim 2, it is characterised in that：The number of the pipeline branch road
Measure as four.
5. coal-fired flue-gas sulfur trioxide removing means according to claim 1, it is characterised in that：What alkaline absorbent was sprayed into
Position is arranged on flue between economizer and SCR reactors.
6. coal-fired flue-gas sulfur trioxide removing means according to claim 1, it is characterised in that：What alkaline absorbent was sprayed into
Position is arranged on flue between SCR reactors and air preheater.
7. coal-fired flue-gas sulfur trioxide removing means according to claim 1, it is characterised in that：What alkaline absorbent was sprayed into
Position is arranged on flue between air preheater and cleaner unit.
8. coal-fired flue-gas sulfur trioxide removing means according to claim 1, it is characterised in that：What alkaline absorbent was sprayed into
Position is arranged on flue between cleaner unit and desulfurizing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621128974.9U CN206152599U (en) | 2016-10-17 | 2016-10-17 | Coal -fired flue gas sulfur trioxide removing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621128974.9U CN206152599U (en) | 2016-10-17 | 2016-10-17 | Coal -fired flue gas sulfur trioxide removing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206152599U true CN206152599U (en) | 2017-05-10 |
Family
ID=58653300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621128974.9U Active CN206152599U (en) | 2016-10-17 | 2016-10-17 | Coal -fired flue gas sulfur trioxide removing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206152599U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109051815A (en) * | 2018-06-29 | 2018-12-21 | 亚德（上海）环保系统有限公司 | A kind of dry-process deacidification material-transporting system |
| CN109173695A (en) * | 2018-10-17 | 2019-01-11 | 浙江德创环保科技股份有限公司 | A kind of the sulfur trioxide removing system and removal methods of coal-fired flue-gas |
-
2016
- 2016-10-17 CN CN201621128974.9U patent/CN206152599U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109051815A (en) * | 2018-06-29 | 2018-12-21 | 亚德（上海）环保系统有限公司 | A kind of dry-process deacidification material-transporting system |
| CN109173695A (en) * | 2018-10-17 | 2019-01-11 | 浙江德创环保科技股份有限公司 | A kind of the sulfur trioxide removing system and removal methods of coal-fired flue-gas |
| CN109173695B (en) * | 2018-10-17 | 2023-08-25 | 浙江德创环保科技股份有限公司 | Sulfur trioxide removal system and method for coal-fired flue gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106345244A (en) | Device and method for removing sulfur trioxide from coal-fired flue gas | |
| US20170203253A1 (en) | Equipment and method for circulating fluidized bed semidry simultaneous desulfurization and denitration of sintering flue gas | |
| CN203764106U (en) | Flue gas denitrification device implemented by combining SNCR (selective non-catalytic reduction)-ozone oxidation with wet absorption | |
| CN202478804U (en) | Sintering machine flue gas desulphurization denitration device | |
| CN203836944U (en) | SNCR-SCR mixed denitration system of circulating fluidized bed boiler | |
| CN110756033A (en) | Deep purification treatment system and process for waste incineration power station flue gas | |
| JP2015128764A (en) | Apparatus and method for evaporating waste water and reducing acid gas emissions | |
| CN211886232U (en) | Sodium-based dry desulfurization system applied to low-sulfur flue gas working condition | |
| CN205164488U (en) | Mixed flue gas wet flue gas desulfurization device of fire coal - catalysis | |
| CN105617861B (en) | A kind of dry powder adsorbent flue injection removing SO3Equipment | |
| CN206152599U (en) | Coal -fired flue gas sulfur trioxide removing device | |
| CN206660922U (en) | A kind of coal-fired power plant flue gas processing device with sulfur trioxide removing means | |
| CN113304585A (en) | Semi-dry desulfurization system suitable for low-sulfur flue gas | |
| CN104984656A (en) | Multistage internal circulation semi-dry method desulfurization, denitrification and demercuration integrated device | |
| CN102266718B (en) | Semi dry process flue gas desulfurization method of circulating fluidized bed based on circulation, and apparatus thereof | |
| CN105498533A (en) | Efficient SCR flue gas denitration system applied to boiler for combusting low-grade coal | |
| CN105903332A (en) | Semi-dry method desulfurization and denitrification integrated process and device in synergism with charged oxidation | |
| CN205517272U (en) | High -efficient SCR flue gas denitration system for boiler combustion coal inferior | |
| CN103301745A (en) | Cyclone separator desulfurization device | |
| CN201572600U (en) | Waste incineration gas purification dry deacidification system | |
| CN105435577A (en) | Multilayer heterogeneous fluidized bed device for activated carbon desulfurization | |
| CN217795420U (en) | Semi-dry desulfurization system suitable for low-sulfur flue gas | |
| CN210473558U (en) | Desulfurization, denitrification and whitening integrated system for sintering machine | |
| CN107261840A (en) | Sintering flue-gas denitration process based on sintering hot returning ore catalysis | |
| CN206701067U (en) | Semi-dry desulphurization system with ozone denitration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |