CN101293174A - Wet process FGD dust collection method - Google Patents
Wet process FGD dust collection method Download PDFInfo
- Publication number
- CN101293174A CN101293174A CNA2007101353212A CN200710135321A CN101293174A CN 101293174 A CN101293174 A CN 101293174A CN A2007101353212 A CNA2007101353212 A CN A2007101353212A CN 200710135321 A CN200710135321 A CN 200710135321A CN 101293174 A CN101293174 A CN 101293174A
- Authority
- CN
- China
- Prior art keywords
- nitrogen
- doctor solution
- atomizing
- desulfurization
- pressure
- 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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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000428 dust Substances 0.000 title claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 49
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 10
- 239000001301 oxygen Substances 0.000 claims abstract description 10
- 239000000243 solution Substances 0.000 claims description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 17
- 239000003546 flue gas Substances 0.000 claims description 13
- 239000007789 gas Substances 0.000 claims description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 239000006227 byproduct Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 3
- 238000001179 sorption measurement Methods 0.000 claims description 3
- 239000012670 alkaline solution Substances 0.000 claims description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 2
- 238000000889 atomisation Methods 0.000 claims 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims 1
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 235000011114 ammonium hydroxide Nutrition 0.000 claims 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims 1
- 239000013535 sea water Substances 0.000 claims 1
- 229910000029 sodium carbonate Inorganic materials 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000006477 desulfuration reaction Methods 0.000 abstract description 29
- 230000023556 desulfurization Effects 0.000 abstract description 26
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 239000000446 fuel Substances 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 6
- 229910052602 gypsum Inorganic materials 0.000 abstract description 4
- 239000010440 gypsum Substances 0.000 abstract description 4
- 238000010298 pulverizing process Methods 0.000 abstract 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 239000013049 sediment Substances 0.000 abstract 1
- 239000002912 waste gas Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The present invention provides a desulfurization and dedusting method through 'energetic pulverization', which takes nitrogen as the pulverization medium and can pulverize desulfurizing liquid in a desulfurization and dedusting tower; that is, nitrogen with certain pressure ensures the desulfurizing liquid is pulverized in the desulfurization and dedusting tower through a pneumatic pulverization nozzle so as to maximize the specific surface area of the desulfurizing liquid, thus ensuring the waste gas fully contacts the desulfurizing liquid and increasing the desulfurization and dedusting efficiency. The pulverization medium also relatively reduces the oxygen concentration in the tower; when the desulfurizing liquid is limewater, the sediment production in the tower can be reduced so as to avoid gypsum plugging in the tower. The nitrogen source is extensive with low cost; the nitrogen is prepared in front of furnace; the separated oxygen is used for furnace combustion so as to improve fuel combustion and increase the heat efficiency of fuel combustion.
Description
Technical field
The present invention relates to a kind of method of wet process of FGD dedusting, the desulfurization and dedusting that is used for the flue gas of boiler or industrial furnace burning generation is handled.
Background technology
Contain sulphur in the fuel, the burning back produces sulfur dioxide, it is the first pollutant of air environmental pollution, the discharging and the acid rain that suppress sulfur dioxide pollute one of problem of the maximum that has become global environment and weather, improvement to boiler and industrial furnace flue gas is to alleviate one of air environmental pollution method effectively, and the wet method sulphur removing and dust removing technology is one of technology of flue gas being carried out purified treatment that is widely used.
The wet process of FGD dedusting technology is to be desulfurizing agent with the alkaline solution, uses the Gas-Liquid Absorption principle and carries out desulfurization and dedusting.Contain dirty gas and contacting of doctor solution and whether fully be one of factor of the maximum that influences its desulfurization and dedusting effect, therefore wet process of FGD equipment must be prerequisite to contain that dirty gas can contact with doctor solution fully, for reaching this purpose, known wet desulphurization device has following several: spray tower desulfurizing dust-collector, whirlwind moisture film desulfurizing tower, venturi scrubber, rotating stream tray scrubber deduster etc.Spray column is because doctor solution sprays with common shower nozzle, and the atomizing effect difference of doctor solution does not even atomize, thereby desulfuration efficiency is not high; Whirlwind moisture film desulfurizing tower and rotating stream tray scrubber deduster have improved the specific area of doctor solution in desulfurizing tower, and desulfuration efficiency improves; Though Venturi scrubber makes the doctor solution atomizing more abundant, power consumption is big, and meticulous can being taken out of by flue gas again of doctor solution atomizing forms actual discharging, thereby influenced its desulfuration efficiency.Therefore all there is technological deficiency in above-mentioned several flue gas desulfurization and dedusting equipment.
Summary of the invention
The present invention proposes a kind of is atomizing medium with nitrogen, " strength atomizing " desulfurization and dust-removal method that doctor solution is atomized in the desulfurization and dedusting tower, promptly there is the nitrogen of certain pressure doctor solution to be atomized in the desulfurization and dedusting tower by pneumatic atomizing nozzle by use, reach the maximization of doctor solution specific area, thereby make and contain dirty flue gas and can fully contact the raising desulfurization dust-removing efficiency with doctor solution.
The technical scheme that the present invention solves its technical problem is: make atomizing medium with the nitrogen with certain pressure, nitrogen gas pressure more than or equal to 0.2MPa and its pressure greater than the pressure 0.1MPa of doctor solution or more than the 0.1MPa, doctor solution is sent into by delivery pump and is arrived pneumatic atomizing nozzle or shower nozzle in the desulfurization and dedusting tower, nitrogen is also delivered to this atomizer or shower nozzle, under the effect of this pneumatic atomizing nozzle or shower nozzle, doctor solution is atomized into uniform molecule, characteristics by the strength atomizing, the atomizing of doctor solution is thinner, the even degree of filling of droplet is good, mist torch dimensionally stable, containing dirty gas can contact with doctor solution fully.
The nitrogen with certain pressure that uses can be the byproduct of oxygen installation, and cost is low; Also can be that source of the gas is produced with pressure swing adsorption method or membrane separation process at the scene of combustion apparatus (boiler or industrial furnace) with compressed air, the oxygen of separating simultaneously when producing can be used for the burning of this combustion apparatus.
The invention has the beneficial effects as follows: doctor solution adopts the strength atomizing, and the even degree of filling of droplet is good, and mist torch dimensionally stable contains dirty gas and can contact the desulfurization dust-removing efficiency height fully with doctor solution.
With nitrogen is that atomizing medium has reduced the concentration of oxygen in the tower relatively in the desulfurization and dedusting tower, when being doctor solution with limewash, can suppress the speed that calcium sulfite is oxidized to semi-hydrated gypsum or dihydrate gypsum, alleviate sedimentary generation in the tower, avoid the obstruction that gypsum forms in the tower.
The atomizing medium wide material sources, with low cost, adopt the stokehold to produce nitrogen, the oxygen of Fen Liing is used for the burning of stove simultaneously, can improve the fuel combustion situation, and it is more abundant to burn, and smoke growing amount is few, and heat loss is few, the thermal efficiency of raising fuel combustion.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing and example.
Fig. 1 is a schematic diagram of the present invention, also is the structure diagram of a kind of embodiment.
Fig. 2 produces the process chart of the embodiment of atomizing medium for stokehold of the present invention.
Among the above-mentioned figure: 1. contain dirty flue gas, 2. the desulfurization and dedusting tower 3. purifies the back flue gas, 4. pneumatic atomizing nozzle or shower nozzle, 5. atomizing medium control valve, 6. doctor solution control valve, 7. atomizing medium, 8. doctor solution, 9. sewage after the desulfurization, 10. combustion apparatus, 11. compressed air, 12. gas separation equipment, 13. by-product oxygen.
The specific embodiment
In Fig. 1, doctor solution nozzle in the desulfurization and dedusting tower (2) is pneumatic atomizing nozzle (4), doctor solution (8) is transported to pneumatic atomizing nozzle (4) with atomizing medium (7) nitrogen by different pipelines, doctor solution (8) atomizes under the effect of pneumatic atomizing nozzle (4), atomizing medium control valve (5) and doctor solution control valve (6) are used to regulate the flow of atomizing medium (7) and doctor solution (8), the dirty flue gas (1) that contains that is come by combustion apparatus (10) fully contacts with the doctor solution (8) of uniform atomizing in desulfurization and dedusting tower (2), handle through absorbing, purify back flue gas (3) and discharged by desulfurization and dedusting tower (2) top, sewage after the desulfurization (9) is discharged from desulfurization and dedusting tower (2) below.
In Fig. 2, atomizing medium (7) nitrogen is that produce the stokehold, with compressed air (11) is source of the gas, separate through gas separation equipment (12), separated nitrogen is transported to pneumatic atomizing nozzle (4) as atomizing medium (7) and doctor solution (8), doctor solution (8) atomizes under the effect of pneumatic atomizing nozzle (4), the dirty flue gas (1) that contains that is come by combustion apparatus (10) fully contacts with the doctor solution (8) of uniform atomizing in desulfurization and dedusting tower (2), handle through absorbing, purify back flue gas (3) and discharged by desulfurization and dedusting tower (2) top, sewage after the desulfurization (9) is discharged from desulfurization and dedusting tower (2) below.By-product oxygen (13) is sent to the burning that combustion apparatus participates in fuel.
Claims (7)
1, a kind of wet process FGD dust collection method is characterized in that: with nitrogen with certain pressure as atomizing medium, is that mode with medium atomization atomizes in desulfurizing tower with medium atomization nozzle or shower nozzle with the doctor solution of wet method sulphur removing and dust removing device, make the doctor solution atomizing evenly, specific area is big, can with contain dirty flue gas and fully contact.
2, according to claim 1, be that the application characteristic of the wet method sulphur removing and dust removing method of atomizing medium is with nitrogen: be used for wet method sulphur removing and dust removing device or similar device.
3, according to claim 2, with nitrogen is that the feature of the doctor solution of the wet method sulphur removing and dust removing device of atomizing medium or similar device is: doctor solution is alkaline solution or seawater such as caustic lime water, ammoniacal liquor, sodium carbonate liquor, does not get rid of the doctor solution of other kinds simultaneously.
4, according to claim 1, using the nitrogen of certain pressure can be Washdown type, internal-mixing, inner-rotary type pneumatic atomizing nozzle etc. as atomizing medium with nozzle or the shower nozzle that doctor solution atomizes, and does not get rid of simultaneously and uses other forms of pneumatic atomizing nozzle or shower nozzle.
5, according to claim 1, have the feature of the nitrogen of certain pressure to be: greater than the pressure 0.1MPa of doctor solution or the nitrogen more than the 0.1MPa, its purity is greater than 90% more than or equal to 0.2MPa and its pressure for gauge pressure pressure.
6, according to claim 5, there is its source of nitrogen of certain pressure to be system oxygen byproduct, or is the nitrogen that source of the gas is produced with pressure swing adsorption method or membrane separation process with compressed air, but do not get rid of the nitrogen that additive method is obtained in the stokehold.
7, described according to claim 6 adopted in the stokehold with compressed air nitrogen that to be source of the gas produce with pressure swing adsorption method or membrane separation process, and isolated oxygen is applied to the burning of stove simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101353212A CN101293174A (en) | 2007-11-04 | 2007-11-04 | Wet process FGD dust collection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101353212A CN101293174A (en) | 2007-11-04 | 2007-11-04 | Wet process FGD dust collection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101293174A true CN101293174A (en) | 2008-10-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101353212A Pending CN101293174A (en) | 2007-11-04 | 2007-11-04 | Wet process FGD dust collection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101293174A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104109898A (en) * | 2014-07-08 | 2014-10-22 | 德清县浙北通讯器材有限公司 | Waste gas treatment device of pickling or electroplating equipment |
| CN113521986A (en) * | 2021-08-20 | 2021-10-22 | 毅康科技有限公司 | Biomass combustion flue gas desulfurization system |
| CN114345108A (en) * | 2022-01-11 | 2022-04-15 | 云锡文山锌铟冶炼有限公司 | Method for treating hematite iron removal tail gas |
-
2007
- 2007-11-04 CN CNA2007101353212A patent/CN101293174A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104109898A (en) * | 2014-07-08 | 2014-10-22 | 德清县浙北通讯器材有限公司 | Waste gas treatment device of pickling or electroplating equipment |
| CN113521986A (en) * | 2021-08-20 | 2021-10-22 | 毅康科技有限公司 | Biomass combustion flue gas desulfurization system |
| CN114345108A (en) * | 2022-01-11 | 2022-04-15 | 云锡文山锌铟冶炼有限公司 | Method for treating hematite iron removal tail gas |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081029 |