CN204768253U - Sulfur trioxide's device in desorption flue gas - Google Patents
Sulfur trioxide's device in desorption flue gas Download PDFInfo
- Publication number
- CN204768253U CN204768253U CN201520375571.3U CN201520375571U CN204768253U CN 204768253 U CN204768253 U CN 204768253U CN 201520375571 U CN201520375571 U CN 201520375571U CN 204768253 U CN204768253 U CN 204768253U
- Authority
- CN
- China
- Prior art keywords
- gas
- flue gas
- flue
- absorbent
- 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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- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 title claims abstract description 44
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000003546 flue gas Substances 0.000 title claims abstract description 31
- 238000003795 desorption Methods 0.000 title abstract 2
- 230000002745 absorbent Effects 0.000 claims abstract description 25
- 239000002250 absorbent Substances 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000005507 spraying Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 5
- 239000003245 coal Substances 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 239000008187 granular material Substances 0.000 abstract description 3
- 239000007921 spray Substances 0.000 abstract 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 9
- 239000000347 magnesium hydroxide Substances 0.000 description 9
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- WWILHZQYNPQALT-UHFFFAOYSA-N 2-methyl-2-morpholin-4-ylpropanal Chemical compound O=CC(C)(C)N1CCOCC1 WWILHZQYNPQALT-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 206010019133 Hangover Diseases 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 210000000697 sensory organ Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a sulfur trioxide's device in desorption flue gas, include: the feed bin, screw feeder has feed inlet and discharge gate, the feed inlet is used for being connected with the feed bin, its ejection of compact speed that is used for controlling the absorbent, the gas -supply pipe has air inlet and gas outlet, and the discharge gate is connected with the gas -supply pipe, the spray gun, the gas outlet is connected with the spray gun, its absorbent that is used for spraying the highly basic granule, denitration entry flue, it is used for mixing absorbent and flue gas, the gas outlet is arranged in the flue with the spray gun, denitration reactor is connected with out of stock entry flue, the spoiler. The device can be applied to the coal -fired unit of thermal power factory, effectively reduces SO3's content, and reduction sulfur trioxide discharges the influence of denitrification facility, air preheater, the cleanness of the flue gas of reducing pollutants thing realization simultaneously.
Description
Technical field
The utility model relates to a kind of apparatus and method removing sulfur trioxide in flue gas, belongs to atmosphere pollution and administers field.
Background technology
Produce a large amount of pollutants in coal-fired process, wherein owing to containing certain density element sulphur in coal, in the flue gas of therefore final discharge, certain density SO can be generated
2and SO
3.
SO
3formation mechanism mainly comprise with lower part, in the combustion process of burner hearth, in coal, a part of element sulphur is converted into SO
3; Flue gas, in back-end surfaces heat transfer process, is subject to the catalysed oxidn of metal pipe-wall, flying dust, a part of SO
2sO can be oxidized to
3; For the unit of newly-increased SCR denitration device, denitrating catalyst also has very strong catalysed oxidn, makes a part of SO
2be oxidized to SO
3.Usually for the coal unit not installing denitrification apparatus, SO
3production rate account for 1% of total sulfur content; For the unit installing SCR denitration device, SO
3production rate higher, usually can account for 1.5 ~ 2% of total sulfur content.
SO
3harm main manifestations in the following areas:
1, SO
3concentration raise, cause the generation concentration of ammonium hydrogen sulfate to increase, cause the minimum continuous spraying ammonia temperature of denitrification apparatus to raise, cause SCR denitration device cannot put into operation under low loading conditions, the availability decline of denitrification apparatus.
2, SO
3cause acid dew point in flue gas to raise in the low-temperature zone of air preheater, the cold end corrosion of air preheater is serious, and under SCR service condition, the generation of ammonium hydrogen sulfate easily causes air preheater to block, and causes the running resistance of air preheater to rise, and equipment life declines.
3, SO
3after entering wet desulphurization, easily form aerosol, cause chimney finally to discharge " blue smoke ", " plume hangover " phenomenon, sense organ extreme difference, simultaneously SO
3direct discharge be the main source causing acid rain.
Current SO
3the means that mainly remove are Wet Flue Gas Desulfurization Technique, wet static dedusting technology etc., but after above-mentioned technology is arranged in electrostatic precipitation, can ensure to reduce final SO
3concentration discharge, but cannot SO be eliminated
3to the harm of front end denitrification apparatus, air preheater.
Summary of the invention
The purpose of this utility model is that one removes SO in flue gas
3apparatus and method, SO in prior art be solved
3to the problem of front end denitrification apparatus, air preheater harm; Also solve SO
3the problem that in burn into flue gas, pollutant emission is many is produced to denitration gas approach.
For achieving the above object, the utility model discloses a kind of device removing sulfur trioxide in flue gas, comprising: feed bin; Screw(-type) feeder, has charging aperture and discharging opening, and described charging aperture is used for being connected with feed bin, and it is for controlling the discharge velocity of absorbent; Appendix, have air inlet and gas outlet, discharging opening is connected with appendix; Ejecting gun, described gas outlet is connected with ejecting gun, and it is for spraying the absorbent of strong basicity particle; Denitration gas approach, it is for mixing absorbent with flue gas, and described gas outlet and ejecting gun are arranged in flue; Benitration reactor, is connected with out of stock gas approach; Spoiler.
Further, the angle of the extended line of axis, described injection apparatus end and the axis of denitration gas approach
it is 15 ~ 65 degree.
Further, described spoiler is inclined relative to horizontal and puts, and the angle α of its plate face and axis, injection apparatus end extended line is 45 ~ 135 degree.
Compared with prior art the utility model has following characteristics and beneficial effect:
Can be applicable to thermal power plant coal unit, effectively reduce SO
3content, reduce sulfur trioxide to the impact of denitrification apparatus, air preheater, reduce pollutant simultaneously and realize the clean discharge of flue gas.
The system that the utility model has the advantage of is simple, by spraying alkaline absorbent particle in flue, utilizes alkaline absorbent to remove SO in flue gas
3, the removal efficiency of sulfur trioxide 80 ~ 90% can be realized; Utilize Geldart-D particle to realize conveying and the injection of absorbent granules, can effectively utilize the injection apparatus of SCR denitration reducing agent to realize the even blending of absorbent granules and flue gas simultaneously, ensure SO
3higher removal efficiency.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail.
Fig. 1 is the structural representation removing sulfur trioxide device in flue gas of the present utility model.
Fig. 2 is the structural representation removing sulfur trioxide device in flue gas of the present utility model.
Fig. 3 is the injection apparatus schematic diagram in the utility model embodiment 1.
Reference numeral: 1-feed bin, 2-screw(-type) feeder, 21-charging aperture, 22-discharging opening, 3-appendix, 31-air inlet, 32-gas outlet, 4-injection apparatus, 5-denitration gas approach, 6-Benitration reactor, 7-spoiler.
Detailed description of the invention
Embodiment 1
Alkaline absorbent selects magnesium hydroxide Mg (OH)
2particle, average grain diameter 40 μm.
Denitration entrance flue gas temperature 350 DEG C, SO
3content 20ppm, according to flue gas condition and magnesia composition, determines that chemical reaction equivalent compares SO
3: Mg (OH)
2=1:3, ensures SO by higher stoichiometric ratio
3removal efficiency.
As shown in Figure 1, a kind of SO removed in flue gas
3process system, magnesium hydroxide absorbent is stored in feed bin 1 with the form of powder, control the delivery rate of absorbent through screw(-type) feeder 2, air-transport system 3 utilizes compressed air delivery magnesium hydroxide particle to injection apparatus 4, is sprayed into by magnesium hydroxide particle in denitration gas approach 5.Magnesium hydroxide realizes, with the even blending of flue gas, removing the part SO in flue gas in denitration flue
3, enter afterwards in Benitration reactor 6.
Be illustrated in figure 2 the detailed description of the invention of absorbent nozzle 4.2 meters, denitration gas approach cross section X11.67 rice, configure the alkaline absorbent jet pipe 7 of four DN40 altogether, for spraying the magnesium hydroxide powder of Geldart-D particle, correspondence arranges four cover spoilers 8 in flue, vortex board diameter 1500mm, vortex board and nozzle position one_to_one corresponding.Flue gas forms eddy current 9 after spoiler 8, entrainments periphery flue gas, realizes the even blending of magnesium hydroxide powder and flue gas, completes removing of follow-up sulfur trioxide.
Under design conditions condition, SO can be ensured
3removal efficiency 86%, be simultaneously less than 0.5% because the magnesium hydroxide sprayed into accounts for flue gas flying dust total amount mass ratio, therefore can not produce considerable influence to the denitrating catalyst in downstream.
Embodiment 2
The difference of the present embodiment and embodiment 1 is to adopt sodium acid carbonate as alkaline absorbent, the particle diameter of absorbent 60 μm.
The alkalescence of sodium acid carbonate alkaline absorbent is higher than magnesium hydroxide, and therefore stoichiometric ratio SO3:NaHCO3=1:5, under design condition, the removal efficiency of SO3 is 90%.
Embodiment 3
The difference of the present embodiment and embodiment 1 is to adopt calcium hydroxide (Ca (OH) 2) as alkaline absorbent, the particle diameter of absorbent 40 μm.
The alkalescence of calcium hydroxide is slightly weak, therefore stoichiometric ratio SO3:Ca (OH) 2=1:8, and under design condition, the removal efficiency of SO3 is 65%.
Embodiment 4
The difference of the present embodiment and embodiment 1 is to adopt concentrated crystal soda (Na
2cO
3naHCO
32H
2o) as alkaline absorbent, the particle diameter of absorbent 100 μm.
Concentrated crystal soda alkalescence is very strong, therefore controls the stoichiometric ratio SO3:Na that all the other SO3 react
2cO
3naHCO
32H
2o=1:6, under design condition, the removal efficiency of SO3 is 72%.
Claims (3)
1. remove a device for sulfur trioxide in flue gas, it is characterized in that, comprising:
Feed bin (1);
Screw(-type) feeder (2), have charging aperture (21) and discharging opening (22), described charging aperture (21) is for being connected with feed bin (1), and it is for controlling the discharge velocity of absorbent;
Appendix (3), have air inlet (31) and gas outlet (32), discharging opening (22) is connected with appendix (3);
Ejecting gun (4), described gas outlet (32) are connected with ejecting gun (4), and it is for spraying the absorbent of strong basicity particle;
Denitration gas approach (5), it is for mixing absorbent with flue gas, and described gas outlet (32) and ejecting gun (4) are arranged in flue (5);
Benitration reactor (6), is connected with out of stock gas approach (5);
Spoiler (7).
2. a kind of device removing sulfur trioxide in flue gas according to claim 1, is characterized in that: the angle β of the extended line of described injection apparatus (4) axis, end and the axis of denitration gas approach (5) is 15 ~ 65 degree.
3. a kind of device removing sulfur trioxide in flue gas according to claim 1, it is characterized in that: described spoiler (7) is inclined relative to horizontal and puts, the angle α of its plate face and injection apparatus (4) axis, end extended line is 45 ~ 135 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520375571.3U CN204768253U (en) | 2015-06-03 | 2015-06-03 | Sulfur trioxide's device in desorption flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520375571.3U CN204768253U (en) | 2015-06-03 | 2015-06-03 | Sulfur trioxide's device in desorption flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204768253U true CN204768253U (en) | 2015-11-18 |
Family
ID=54508384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520375571.3U Active CN204768253U (en) | 2015-06-03 | 2015-06-03 | Sulfur trioxide's device in desorption flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204768253U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104857841A (en) * | 2015-06-03 | 2015-08-26 | 北京国电龙源环保工程有限公司 | Device and method for removing sulfur trioxide from smoke |
| CN105854537A (en) * | 2016-05-09 | 2016-08-17 | 清华大学 | Industrial furnace sulfur trioxide pre-removing and denitration device and method |
-
2015
- 2015-06-03 CN CN201520375571.3U patent/CN204768253U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104857841A (en) * | 2015-06-03 | 2015-08-26 | 北京国电龙源环保工程有限公司 | Device and method for removing sulfur trioxide from smoke |
| CN105854537A (en) * | 2016-05-09 | 2016-08-17 | 清华大学 | Industrial furnace sulfur trioxide pre-removing and denitration device and method |
| CN105854537B (en) * | 2016-05-09 | 2019-05-07 | 清华大学 | An industrial furnace and kiln pre-removal of sulfur trioxide and denitration device and method |
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Legal Events
| 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: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing. Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |