CN205084619U - System for sulfur trioxide in coal -fired flue gas of desorption power plant - Google Patents
System for sulfur trioxide in coal -fired flue gas of desorption power plant Download PDFInfo
- Publication number
- CN205084619U CN205084619U CN201520910104.6U CN201520910104U CN205084619U CN 205084619 U CN205084619 U CN 205084619U CN 201520910104 U CN201520910104 U CN 201520910104U CN 205084619 U CN205084619 U CN 205084619U
- Authority
- CN
- China
- Prior art keywords
- nozzle
- flue
- spray gun
- flue gas
- sulfur trioxide
- 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.)
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000003546 flue gas Substances 0.000 title claims abstract description 47
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000003245 coal Substances 0.000 title abstract description 5
- 238000003795 desorption Methods 0.000 title abstract 2
- 239000007921 spray Substances 0.000 claims abstract description 42
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 22
- 241001625808 Trona Species 0.000 claims abstract description 19
- 239000002002 slurry Substances 0.000 claims description 12
- 239000003517 fume Substances 0.000 claims description 9
- 239000004071 soot Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 5
- 210000002966 serum Anatomy 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 abstract description 7
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 235000019504 cigarettes Nutrition 0.000 abstract description 2
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 abstract 2
- 230000002745 absorbent Effects 0.000 description 5
- 239000002250 absorbent Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 108700018263 Brassica oleracea SCR Proteins 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a system for sulfur trioxide in coal -fired flue gas of desorption power plant evenly lays external spray gun system on the flue, the nozzle of spray gun system is located the flue, and the spray direction of nozzle is perpendicular with cigarette airflow direction, nozzle and flue lateral wall become to set for the angle, guarantee that the thick liquid can even sufficient flue cross -section, spray gun system and trona thick liquid preparation system intercommunication. The utility model discloses reduce SO3 to the mipor jam of SCR denitration catalyst surface, improved the life of catalyst, reduce the corruption jam of SO3 to SCR denitrification facility air heater, increased air heater's life -span, effectively reduce simultaneously SO3 content in the air, solved the many problems of pollutant emission in the flue gas, improved the environment.
Description
Technical field
The utility model relates to the system that in a kind of power plant soot fume, sulfur trioxide removes, and belongs to atmosphere pollution Treatment process field.
Background technology
SO
3be a small amount of a kind of polluter existed in the middle of coal fired power plant flue gas, its generation mainly contains two aspects: one is the SO in burner hearth coal-fired flue-gas
2generate after further oxidation; Two is by SO in SCR reactor
2oxidation generates.Its existence not only can run the normal table in power station and produce potential threat, also can produce serious pollution to atmospheric environment simultaneously.In addition, due to SO in flue gas
3the increase of concentration, it also becomes increasingly conspicuous on the impact of coal fired power plant SCR upstream device.
SO in flue gas
3can with excessive NH in steam, SCR
3reaction, generates ammonium sulfate and ammonium hydrogen sulfate.The micropore on meeting blocking catalyst surface, makes catalyst failure, reduces NO
xremoval efficiency, decrease the service life of catalyst.In addition, SO
3and SO
2existence Deng sour gas also can have an impact to the removal efficiency that SCR catalyst removes mercury in flue gas.
When flue gas flows through air preheater, cigarette temperature can decline rapidly, if SO in flue gas
3content more, easily produce H
2sO
4tube wall condensation phenomenon, add the corrosion to air preheater, decrease the life-span of air preheater.In addition, the dew point of ammonium hydrogen sulfate is 147 DEG C, is the very strong and material had compared with severe corrosive of a kind of adhesiveness.Below above flow of flue gas to the cold junction layer of air preheater conventional design and intermediate layer, the extremely strong absorption property of ammonium hydrogen sulfate can cause a large amount of ash content to be deposited in metal surface and to be stuck in interlayer to cause blocking.This blocking can increase the resistance of flue, increases the power consumption of air-introduced machine, even forces blowing out to clear up the stifled ash of preheater.
Flue gas SO
3h can be generated with steam
2sO
4, when flue-gas temperature drops to a certain degree, H
2sO
4will condense on tube wall, the temperature starting to occur condensation is exactly the acid dew point of this flue gas.If the SO in flue gas
3when concentration is increased to 10ppm from 5ppm, the dew-point temperature of flue gas will improve 7 DEG C.Flue gas through wet desulphurization tower, due to the rapid reduction of temperature, SO
3the H formed is reacted with water
2sO
4the droplet that particle is minimum can be formed.Desulfurizing tower takes off removal efficiency for this little droplet only between 30-50%.Therefore, as the SO in flue gas
3when concentration is higher, just there will be " Lan Yu " phenomenon at chimney breast.
Therefore, along with the large-scale application of SCR denitration technology, SO
3pollution problem obtains the attention of people gradually, SO
3environmental capacity work extremely urgent, and become the focus of research.
Utility model content
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, a kind of system removing sulfur trioxide in power plant soot fume is provided, utilize the trona of sodium carbonate cheap and easy to get, sodium acid carbonate, concentrated crystal soda and composition thereof, effectively remove sulfur trioxide in flue gas.
For achieving the above object, the utility model adopts following technical proposals:
A kind of system removing sulfur trioxide in power plant soot fume, flue evenly lays external gun system, the nozzle of described gun system is positioned at flue, and the injection direction of nozzle is vertical with flue gas flow path direction, described nozzle becomes set angle with flue sidewall, ensures that slurries evenly can fill flue cross section; Described gun system is communicated with trona serum producing system.
Described gun system is evenly laid on flue front or the back side or side; Ensure that the aqueous slkali that gun system sprays can cover whole flue.
Preferably, described gun system comprises solid-cone (type) nozzle spray gun and fan nozzle spray gun, and solid-cone (type) nozzle spray gun and fan nozzle spray gun are separated by laying on flue; Described solid-cone (type) nozzle spray gun arranges solid-cone (type) nozzle, described fan nozzle spray gun arranges fan nozzle; Broad covered area, penetration power are strong, and the aqueous slkali of spray gun ejection presents fan-shaped spray shape, make aqueous slkali and contact in flue gas fully, reach the object removing sulfur trioxide in flue gas as much as possible.
Described solid-cone (type) nozzle and fan nozzle are wear-resistant material and make, and improve nozzle to the degree of resistance to wearing of flue gas.
Described solid-cone (type) nozzle and fan nozzle outside are all overlapped and are had abrasionproof part, prevent flue gas to the wearing and tearing of nozzle.
Trona serum producing system, according to flue gas SO
3content, trona composition and boiler practical operation situation carry out slurries outfit, are ensureing that semidry method removes SO
3while improve SO
3removal efficiency.
Nozzle needs according to actual conditions adjustment quantity, layout angle and exit velocity, improve the uniformity that nozzle flow velocity can increase alkali lye distribution, but the air consumption of nozzle can be increased, reduce flue-gas temperature, increase energy consumption, also can strengthen the wearing and tearing of absorbent to nozzle simultaneously, shorten the service life of nozzle, the selection of nozzle quantity, layout angle and exit velocity should ensure to reduce flue resistance by the Homogeneous phase mixing of absorbent and flue gas simultaneously as far as possible.
The utility model arranges nozzle system by flue place vertical before SCR reactor, sprays into trona slurries in flue, utilizes the highly basic characteristic of trona to SO
3carry out absorbing and removing, removal efficiency can reach more than 80%.
The utility model ensures the Homogeneous phase mixing of absorbent and flue gas by arranging the position of nozzle, quantity, angle and exit velocity, solve SO in prior art
3to the problem of SCR denitration device, air preheater harm; Also solve SO
3the problem that in burn into flue gas, pollutant emission is many is produced to denitration gas approach, realizes the clean discharge of flue gas.
The beneficial effects of the utility model are:
The utility model decreases SO
3to the blocking of SCR denitration surface micropore, improve the service life of catalyst; Decrease SO
3to the clog of SCR denitration device air preheater, add the life-span of air preheater; Effectively reduce SO in air simultaneously
3content, solves the problem that pollutant emission in flue gas is many, improves environment.
The utility model spraying system, to flue non-resistance, does not affect existing equipment and runs.
Accompanying drawing explanation
Fig. 1 is the system spray gun installation site schematic diagram that the utility model removes sulfur trioxide;
Fig. 2 is the utility model lance ejection design sketch;
In figure, 1-SCR Benitration reactor, 2-inlet flue duct, 3-spray gun, 4-inlet flue duct cross section, 5-nozzle spray direction.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Utilize trona solution effectively to remove the device of sulfur trioxide in flue gas, enforcing location is regularly arranged external spray gun on the vertical flue of SCR denitration reactor.Gun system connects trona solution preparation system, gun system adopts solid-cone (type) nozzle spray gun and fan nozzle spray gun to combinationally use, the aqueous slkali of spray gun ejection presents fan-shaped spray shape, the aqueous slkali of the lance ejection of arranging can cover whole flue, make aqueous slkali and contact in flue gas fully, reach the object removing sulfur trioxide in flue gas as much as possible.Mix the technique effectively removing sulfur trioxide in flue gas with flue gas after utilizing trona to be configured to solution spray, alkali slurries hydro-peening fully absorbs SO
3, then entering SCR reactor, the trona slurries after absorption are evaporated by flue gas drying.
Embodiment 1:
As shown in Figure 1, for certain 300WM coal unit, utilize trona solution effectively to remove the device of sulfur trioxide in flue gas, spray gun 3 is laid in the smoke inlet flue 2 bottom position perforate being included in SCR denitration reactor 1.The pipe-line system that spray gun 3 connects connects trona serum producing system.
According to flue gas SO
3content, trona composition and boiler practical operation situation configuration slurries, recommend trona (alkali lye mass concentration is 15 ~ 30%) and SO
3about mol ratio 9:1, removes SO under guarantee slurries volatilization state
3while improve SO
3removal efficiency.
Nozzle system is arranged in the flue of SCR Reactor inlet, and spray gun 3 adopts disposed outside mode, ensures the Homogeneous phase mixing of absorbent and flue gas, reduces flue resistance, is conducive to reducing fan energy consumption.
As shown in Figure 2, spray gun 3 is vertical with inlet flue duct cross section 4, and nozzle spray direction 5 is vertical with inlet flue duct cross section 4, and in fan-shaped spray shape, the aqueous slkali that the spray gun 3 of layout sprays can cover whole flue.
Spray gun can adopt the multiple location arrangements such as vertical flue front, the back side, side, and spray gun 3 is arranged vertical with flue gas direction, and it is vertical that the slurries that nozzle sprays and flue gas carry out flow path direction.Nozzle arranges certain angle, and ensure slurries evenly full flue cross section, the solid-cone that the preferred broad covered area of nozzle, penetration power are strong and fan-shaped spray gun combinationally use.
Sulfur trioxide in flue gas concentration, at least at 3ppm, is more generally about 10ppm to about 200ppm.The temperature of flue gas most preferably is 250 DEG C ~ 450 DEG C.The concentration of trona slurries is according to sulfur trioxide change in concentration, and mass concentration is between 15 ~ 30%, and nozzle exit velocity is about 40m/s.
For preventing flue gas to the wearing and tearing of nozzle, nozzle can choose the abrasion resisting materials such as carborundum, or takes Precautionary Measure such as suit protective jacket, abrasion resistant corrosion resistant ceramic member etc.
In this example, nozzle system is set at SCR reactor inlet flue place, in flue, sprays into concentration 20% trona slurries, utilize the highly basic characteristic of trona to SO
3carry out absorbing and removing, removal efficiency can reach 88%, ensureing the Homogeneous phase mixing of absorbent and flue gas, selecting silicon carbide material nozzle to reduce wear, not having drag effects to whole flue by arranging the position of nozzle, quantity, angle and exit velocity.
By reference to the accompanying drawings detailed description of the invention of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (5)
1. one kind removes the system of sulfur trioxide in power plant soot fume, it is characterized in that, flue evenly lays external gun system, the nozzle of described gun system is positioned at flue, and the injection direction of nozzle is vertical with flue gas flow path direction, described nozzle becomes set angle with flue sidewall, ensures that slurries evenly can fill flue cross section; Described gun system is communicated with trona serum producing system.
2. remove the system of sulfur trioxide in power plant soot fume as claimed in claim 1, it is characterized in that, described gun system is evenly laid on flue front or the back side or side.
3. remove the system of sulfur trioxide in power plant soot fume as claimed in claim 1 or 2, it is characterized in that, described gun system comprises solid-cone (type) nozzle spray gun and fan nozzle spray gun, and solid-cone (type) nozzle spray gun and fan nozzle spray gun are separated by laying on flue; Described solid-cone (type) nozzle spray gun arranges solid-cone (type) nozzle, described fan nozzle spray gun arranges fan nozzle.
4. remove the system of sulfur trioxide in power plant soot fume as claimed in claim 3, it is characterized in that, described solid-cone (type) nozzle and fan nozzle are wear-resistant material and make.
5. remove the system of sulfur trioxide in power plant soot fume as claimed in claim 3, it is characterized in that, described solid-cone (type) nozzle and fan nozzle outside are all overlapped and are had abrasionproof part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520910104.6U CN205084619U (en) | 2015-11-13 | 2015-11-13 | System for sulfur trioxide in coal -fired flue gas of desorption power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520910104.6U CN205084619U (en) | 2015-11-13 | 2015-11-13 | System for sulfur trioxide in coal -fired flue gas of desorption power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205084619U true CN205084619U (en) | 2016-03-16 |
Family
ID=55475343
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520910104.6U Expired - Fee Related CN205084619U (en) | 2015-11-13 | 2015-11-13 | System for sulfur trioxide in coal -fired flue gas of desorption power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205084619U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108479325A (en) * | 2018-05-16 | 2018-09-04 | 山东志伟环保科技有限公司 | A kind of mixing arrangement of oxidation and denitration |
| CN108671715A (en) * | 2018-05-11 | 2018-10-19 | 南京师范大学 | A kind of coal-fired flue-gas sulfur trioxide removing means and its application method and application |
| CN113385022A (en) * | 2020-03-14 | 2021-09-14 | 上海梅山钢铁股份有限公司 | Method for removing sulfur dioxide in flue gas of complex production coke oven |
-
2015
- 2015-11-13 CN CN201520910104.6U patent/CN205084619U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108671715A (en) * | 2018-05-11 | 2018-10-19 | 南京师范大学 | A kind of coal-fired flue-gas sulfur trioxide removing means and its application method and application |
| CN108479325A (en) * | 2018-05-16 | 2018-09-04 | 山东志伟环保科技有限公司 | A kind of mixing arrangement of oxidation and denitration |
| CN113385022A (en) * | 2020-03-14 | 2021-09-14 | 上海梅山钢铁股份有限公司 | Method for removing sulfur dioxide in flue gas of complex production coke oven |
| CN113385022B (en) * | 2020-03-14 | 2022-03-15 | 上海梅山钢铁股份有限公司 | Method for removing sulfur dioxide in flue gas of complex production coke oven |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 250101 Huate building, Shanda Science Park, Yingxiu Road, high tech Zone, Jinan City, Shandong Province Patentee after: Shandong Shanda Huate Environmental Protection Technology Co.,Ltd. Address before: 250101 Huate building, Shanda Science Park, Yingxiu Road, Lixia District, Jinan City, Shandong Province Patentee before: SHANDONG SHANDA WIT ENVIRONMENTAL ENGINEERING Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 250101 Huate building, Shanda Science Park, Yingxiu Road, high tech Zone, Jinan City, Shandong Province Patentee after: Shandong Huate Environmental Protection Technology Co.,Ltd. Address before: 250101 Huate building, Shanda Science Park, Yingxiu Road, high tech Zone, Jinan City, Shandong Province Patentee before: Shandong Shanda Huate Environmental Protection Technology Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160316 |