CN101991996A - Dedusting and desulfuration method and equipment for coal-fired boiler - Google Patents
Dedusting and desulfuration method and equipment for coal-fired boiler Download PDFInfo
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- CN101991996A CN101991996A CN2009100340356A CN200910034035A CN101991996A CN 101991996 A CN101991996 A CN 101991996A CN 2009100340356 A CN2009100340356 A CN 2009100340356A CN 200910034035 A CN200910034035 A CN 200910034035A CN 101991996 A CN101991996 A CN 101991996A
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- boiler
- desulfurizing tower
- sedimentation basin
- doctor solution
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Abstract
The invention provides dedusting and desulfuration method and equipment for a coal-fired boiler. The method comprises the steps of: introducing boiler smoke into a deduster for dedusting; exhausting boiler wastewater into a settling tank, enabling the wastewater to flow into an alkali liquor tank after settling, regulating the pH value of the settled wastewater to be 11-13, and pumping into a desulfuration tower to be used as a desulfuration liquid; introducing the dedusted smoke into a desulfuration tower to be in full contact with the desulfuration liquid, removing SO2 in the smoke and reaching the standard for emission; discharging the wastewater at the bottom of the desulfuration tower into the settling tower, and recycling after settling. The invention has the advantages of realizing the desulfuration on the boiler smoke, achieving the purpose of treating wastes with processes of wastes against one another, and lowering the cost of treating the boiler smoke dedusting the boiler smoke by adopting the deduster and then desulfurating the smoke gas by adopting the boiler wastewater.
Description
Technical field
The present invention relates to a kind of dust-collecting sulfur-removing method and equipment that is used for fire coal boiler fume.
Background technology
Every day discharged a large amount of flue gases by coal-burning boiler, and dust in flue gas and sulfur dioxide are one of important pollution sources that cause atmosphere pollution.At present, the improvement of dust in the boiler smoke mainly is to adopt sack cleaner and electric cleaner; Administer the approach of boiler flue gas sulphur dioxide: the one, desulfurization before the burning is as coal washing, bacterial desulfurization; The 2nd, desulfurization in the burning is as industrialization capturing sulfur briquette, in-furnace calcium spraying; The 3rd, burning back desulfurization is promptly carried out desulfurization to flue gas.Wherein flue gas desulfurization is most widely used general, its technical maturity, and desulfurized effect is obvious.Flue gas desulfurization is exactly continuously flue gas to be sprayed certain density alkali lye, allows alkali lye absorb sulfur in smoke, therefore needs use up a large amount of alkali and water in flue gas desulfurization.
Coal-burning boiler is discharged a large amount of waste water in running, this waste water is strong basicity, and alkali concn is 0.06～0.08%, and wherein NaOH accounts for about 42%, NaCO
3Account for about 58%, the pH value reaches 11～14, thereby boiler waste water is again one of important pollution sources that cause water resource pollution.Could discharge after boiler waste water is must be treated up to standard.
Summary of the invention
The object of the present invention is to provide a kind of dust-collecting sulfur-removing method and equipment that is used for fire coal boiler fume, after adopting deduster that boiler smoke is carried out dedusting, adopting boiler waste water that flue gas is carried out desulfurization again handles, realize the dust-removal and desulfurizing of boiler smoke, reach the purpose of the treatment of wastes with processes of wastes against one another, reduction boiler smoke control expense.
For achieving the above object, the present invention takes following technical scheme:
The dust-collecting sulfur-removing method that is used for fire coal boiler fume of the present invention:
Boiler smoke is fed in the deduster, carry out dust removal process; Boiler waste water enters in the sedimentation basin, and post precipitation waste water flows in the alkali lye pond, the pH value of post precipitation waste water is adjusted to 11～13 after, pump in the desulfurizing tower as doctor solution; Flue gas after the dedusting is fed in the desulfurizing tower, fully contact the SO in the flue gas with doctor solution
2Be removed the back qualified discharge; Desulfurizing tower bottom sewage enters in the sedimentation basin, and post precipitation recycles.
Flue gas after the above-mentioned dedusting feeds desulfurizing tower, imported by force in the doctor solution by the cloth gas hood in the desulfurizing tower, form vacuole continuously, vacuole explosion under the effect of air-flow forms the liquid mist, thereby in limited space, form unlimited surface loading, make the SO in the flue gas
2Fully contact, react with doctor solution.
The dust-removal and desulfurizing equipment that is used for fire coal boiler fume of the present invention comprises: deduster, desulfurizing tower, sedimentation basin and alkali lye pond; The air inlet and the boiler flue of deduster interlink, and the air outlet of deduster and the air inlet of desulfurizing tower interlink, and the air outlet of desulfurizing tower is equipped with the guiding blower fan; The delivery port of sedimentation basin and boiler interlinks, so that boiler waste water is introduced in the sedimentation basin; Sedimentation basin and alkali lye pond interlink, and so that the waste water of post precipitation is introduced in the alkali lye pond, the alkali lye pond is provided with alkali adding tank and purge valve, is 11～13 with the pH value of controlling waste water, as doctor solution; The alkali lye pond interlinks by the top inlet of water pump and desulfurizing tower, and doctor solution is pumped in the desulfurizing tower; The liquid outlet and the sedimentation basin of desulfurizing tower bottom interlink; Be provided with dredge pump in the sedimentation basin, so that sediment is discharged sedimentation basin.
Be provided with the flue that interlinks with air inlet in the above-mentioned desulfurizing tower, the upper end of this flue exceeds the gas-distributing pipe of doctor solution liquid level for several, the top of each gas-distributing pipe is provided with the branch gas hood that periphery immerses doctor solution, after making that flue gas after the dedusting enters flue from air inlet, import in the doctor solution by force by several gas-distributing pipes and branch gas hood, constantly produce vacuole, vacuole explosion under the effect of air-flow forms the liquid mist, makes the SO in the flue gas
2Fully contact, react with doctor solution.
Beneficial effect of the present invention is: after adopting deduster that boiler smoke is carried out dedusting, adopt boiler waste water that flue gas is carried out desulfurization again and handle, realize the dust-removal and desulfurizing of boiler smoke, reach the purpose of the treatment of wastes with processes of wastes against one another, reduced the expense that boiler smoke is administered.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Among the figure: 1 is that coal-burning boiler, 2 is that economizer, 3 is that sack cleaner, 4 is that regular drainpipe, 5 is that continuous drainage pipe, 6 is that blower fan, 7 is that flue, 8 is that cloth gas hood, 9 is that air-introduced machine, 10 is that desulfurizing tower, 11 is that feed liquor valve, 12 is that water pump, 13 is that liquid valve, 14 is that sedimentation basin, 15 is that purge valve, 16 is that alkali adding tank, 17 is that alkali lye pond, 18 is that dredge pump, 19 is a gas-distributing pipe.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing.
A kind of dust-removal and desulfurizing equipment that is used for coal-burning boiler of the present invention comprises sack cleaner 3, desulfurizing tower 10, sedimentation basin 14 and alkali lye pond 17; The air inlet of sack cleaner 3 (or electric cleaner) interlinks through the flue of economizer 2 with coal-burning boiler 1, and the air outlet of sack cleaner 3 interlinks by the air inlet of blower fan 6 with desulfurizing tower 10, and the air outlet of desulfurizing tower 10 is equipped with guiding blower fan 9; Sedimentation basin 14 interlinks with regular drainpipe 4, the continuous drainage pipe 5 of coal-burning boiler 1, so that the waste water of coal-burning boiler 1 is introduced in the sedimentation basin 14; The top of sedimentation basin 14 and alkali lye pond 17 interlink, and so that the waste water of post precipitation is introduced in the alkali lye pond 17, alkali lye pond 17 is provided with alkali adding tank 16 and purge valve 15, is 11～13 with the pH value of controlling waste water, as doctor solution; Alkali lye pond 17 interlinks by the top inlet of water pump 12 with desulfurizing tower 10, and doctor solution is pumped in the desulfurizing tower 10; The liquid outlet of desulfurizing tower 10 bottoms interlinks by liquid valve 13 and sedimentation basin 14; Be provided with dredge pump 18 in the sedimentation basin 14, sediment is discharged sedimentation basin 14.Be provided with the flue 7 that interlinks with air inlet in the above-mentioned desulfurizing tower 10, the upper end of this flue 7 exceeds the gas-distributing pipe 19 of doctor solution liquid level for several, the top of each gas-distributing pipe 19 is provided with the branch gas hood 8 that periphery immerses doctor solution, after making that flue gas after the dedusting enters flue 7 from air inlet, imported in the doctor solution by several gas-distributing pipes 19 and branch gas hood Final 8 row, constantly produce vacuole, vacuole explosion under the effect of air-flow forms the liquid mist, thereby in limited space, form unlimited surface loading, make the SO in the flue gas
2Fully contact, react with doctor solution.
A kind of dust-collecting sulfur-removing method that is used for coal-burning boiler of the present invention: the flue gas of coal-burning boiler feeds in the sack cleaner 3 by economizer 2, carries out dust removal process; The waste water of coal-burning boiler 1 enters in the sedimentation basin 14 by regular drainpipe 4, continuous drainage pipe 5, post precipitation waste water flows in the alkali lye pond 17, and the pH value of post precipitation waste water is adjusted to 12 backs (decide on coal-fired sulfur content) by alkali adding tank 16 or purge valve 15, it is interior as doctor solution to pump into desulfurizing tower 10 by water pump 12. Flue gas after the dedusting is fed in the desulfurizing tower 10 by blower fan 6,19 pairs of flue gases of gas-distributing pipe by flue 7 and upper end thereof distribute, flue gas is imported in the doctor solution by cloth gas hood Final 8 row, form vacuole continuously, vacuole explosion under the effect of air-flow forms the liquid mist, thereby in limited space, form unlimited surface loading, make the SO in the flue gas
2Fully contact, react with doctor solution.SO in the flue gas
2Be removed up to standard, by air-introduced machine 9 discharging; Desulfurizing tower 10 bottom sewage enter in the sedimentation basin 14, and post precipitation recycles.Sediment in the sedimentation basin is discharged by dredge pump 18.
Claims (4)
1. a dust-collecting sulfur-removing method that is used for coal-burning boiler feeds boiler smoke in the deduster, carries out dust removal process; It is characterized in that: boiler waste water enters in the sedimentation basin, and post precipitation waste water flows in the alkali lye pond, the pH value of post precipitation waste water is adjusted to 11～13 after, pump in the desulfurizing tower as doctor solution; Flue gas after the dedusting is fed in the desulfurizing tower, fully contact with doctor solution, the SO2 in the flue gas is removed the back qualified discharge; Desulfurizing tower bottom sewage enters in the sedimentation basin, and post precipitation recycles.
2. a kind of dust-collecting sulfur-removing method that is used for coal-burning boiler according to claim 1, it is characterized in that: the flue gas after the above-mentioned dedusting feeds desulfurizing tower, import in the doctor solution by force by the cloth gas hood in the desulfurizing tower, form vacuole continuously, vacuole explosion under the effect of air-flow forms the liquid mist, thereby in limited space, form unlimited surface loading, make the SO2 in the flue gas fully contact, react with doctor solution.
3. a dust-removal and desulfurizing equipment that is used for fire coal boiler fume is characterized in that: comprise deduster, desulfurizing tower, sedimentation basin and alkali lye pond; The air inlet and the boiler flue of deduster interlink, and the air outlet of deduster and the air inlet of desulfurizing tower interlink, and the air outlet of desulfurizing tower is equipped with the guiding blower fan; The delivery port of sedimentation basin and boiler interlinks, so that boiler waste water is introduced in the sedimentation basin; Sedimentation basin and alkali lye pond interlink, and so that the waste water of post precipitation is introduced in the alkali lye pond, the alkali lye pond is provided with alkali adding tank and purge valve, is 11～13 with the pH value of controlling waste water, as doctor solution; The alkali lye pond interlinks by the top inlet of water pump and desulfurizing tower, and doctor solution is pumped in the desulfurizing tower; The liquid outlet and the sedimentation basin of desulfurizing tower bottom interlink; Be provided with dredge pump in the sedimentation basin, so that sediment is discharged sedimentation basin.
4. a kind of dust-removal and desulfurizing equipment that is used for fire coal boiler fume according to claim 3, it is characterized in that: be provided with the flue that interlinks with air inlet in the above-mentioned desulfurizing tower, the upper end of this flue exceeds the gas-distributing pipe of doctor solution liquid level for several, the top of each gas-distributing pipe is provided with the branch gas hood that periphery immerses doctor solution, after making that flue gas after the dedusting enters flue from air inlet, import in the doctor solution by force by several gas-distributing pipes and branch gas hood, constantly produce vacuole, vacuole explosion under the effect of air-flow forms the liquid mist, makes the SO2 in the flue gas fully contact, react with doctor solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100340356A CN101991996A (en) | 2009-08-19 | 2009-08-19 | Dedusting and desulfuration method and equipment for coal-fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100340356A CN101991996A (en) | 2009-08-19 | 2009-08-19 | Dedusting and desulfuration method and equipment for coal-fired boiler |
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| Publication Number | Publication Date |
|---|---|
| CN101991996A true CN101991996A (en) | 2011-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100340356A Pending CN101991996A (en) | 2009-08-19 | 2009-08-19 | Dedusting and desulfuration method and equipment for coal-fired boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343208A (en) * | 2011-09-24 | 2012-02-08 | 宁波怡诺能源科技有限公司 | Dedusting and desulfurizing device for boiler |
| CN103058435A (en) * | 2012-10-22 | 2013-04-24 | 中国能源建设集团广东省电力设计研究院 | Method for circularly processing hot boiler flue gas and desulfurization wastewater |
| CN106582164A (en) * | 2015-10-20 | 2017-04-26 | 铁鎯电动工具有限公司 | Dust removing equipment with two-stage dust filtering device |
-
2009
- 2009-08-19 CN CN2009100340356A patent/CN101991996A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343208A (en) * | 2011-09-24 | 2012-02-08 | 宁波怡诺能源科技有限公司 | Dedusting and desulfurizing device for boiler |
| CN103058435A (en) * | 2012-10-22 | 2013-04-24 | 中国能源建设集团广东省电力设计研究院 | Method for circularly processing hot boiler flue gas and desulfurization wastewater |
| CN106582164A (en) * | 2015-10-20 | 2017-04-26 | 铁鎯电动工具有限公司 | Dust removing equipment with two-stage dust filtering device |
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Application publication date: 20110330 |