CN102120128A - Flue gas desulfurization process for small-sized heating or short-running-cycle boiler - Google Patents
Flue gas desulfurization process for small-sized heating or short-running-cycle boiler Download PDFInfo
- Publication number
- CN102120128A CN102120128A CN2011100435550A CN201110043555A CN102120128A CN 102120128 A CN102120128 A CN 102120128A CN 2011100435550 A CN2011100435550 A CN 2011100435550A CN 201110043555 A CN201110043555 A CN 201110043555A CN 102120128 A CN102120128 A CN 102120128A
- Authority
- CN
- China
- Prior art keywords
- desulfurization
- flue gas
- coal
- sedimentation basin
- reaction
- 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.)
- Pending
Links
Images
Abstract
The invention relates to a desulfurization technology, in particular to a flue gas desulfurization process for a small-sized heating or short-running-cycle boiler, wherein the process provided by the invention is used for realizing desulfurization of a coal-fired boiler. In the method, limestone powder and coal are mixed and then added in a hearth, wherein the quantity rate of calcium to sulfur is 1.3-1.5; the sulfur dioxide generated by coal burning and the limestone powder are subjected to chemical reaction in the hearth so as to complete the main desulfurization process, the solid generated by reaction and slag are flushed to a desulfurization sedimentation basin together; the sulfur dioxide generated by residue sulfur elements enters a desulfurizing tower along with the flue gas; and the precipitated slag is cleared in the desulfurization sedimentation basin, the slurry containing lime at the upper part of the desulfurization sedimentation basin is fed into the desulfurizing tower by a desulfurization circulating pump and is in contact with the flue gas upstream from the lower part of the desulfurization sedimentation basin to be subjected to the desulfurization reaction again, the slurry after reaction falls in the bottom of the tower and overflows to a flushing tank through an overflow port, and finally the total sulfur elements are completely removed and collected.
Description
Technical field
The present invention relates to a kind of desulfur technology, be specially a kind of small heater or short period operation boiler flue gas desulfurization process of being applied to.
Background technology
Boiler is the most frequently used equipment that the northern China heating is heated up water, the pollution that the burning in boiler coal causes is very serious, especially the element sulphur that contains in the coal, must effectively remove and to reduce atmosphere pollution, especially (small heater or short period operation boiler refer to below the 20T boiler of small heater boiler or short period operation, the heating of time less than half a year runs without interruption, school's water supply boiler etc.), in the prior art, the general thinking of technology to boiler desulfurization is the flue gas that boiler combustion produces to be carried out the desulfurization processing of neutralization reaction, such as utilizing alkaline doctor solution to flue gas washing.Application number is 200810246127.6 to disclose a kind of desulfuration method of bioler, its thinking is with calcium carbonate and coal mixed combustion, thereby in combustion process, just react away a part of element sulphur, but this scheme does not have concrete method of operating, and its desulfurized effect and unsatisfactory.
Summary of the invention
The present invention provides a kind of small heater or short period operation boiler flue gas desulfurization process for the technical problem of the desulfurization that solves the burning in boiler coal.
The present invention is realized by following technical scheme, a kind of small heater or short period operation boiler flue gas desulfurization process, to add burner hearth together after agstone and the coal mixing, the ratio of the amount of calcium sulfur material is 1.3-1.5, in burner hearth, sulfur dioxide and agstone generation chemical reaction that coal combustion produces are finished main sweetening process, and the solids that reaction generates is flushed in the desulfurization sedimentation basin by water with slag; The sulfur dioxide that the residue element sulphur generates enters desulfurizing tower with flue gas.
In the desulfurization sedimentation basin, the slag cleaning that precipitates, the slurries that lime is contained on top are squeezed into desulfurizing tower by desulfuration recycle pump, contact with the upstream flue gas in bottom, desulphurization reaction takes place once more, reacted slurries fall at the bottom of the tower from the overfall overflow to the flushing cinder pond, and so far whole element sulphurs is removed collection fully.
Reaction principle:
1, desulfuration principle in the boiler furnace
CaCO
3=CaO+CO
2
CaO+SO-
2+1/2O
2=?CaSO
4
2, reactional equation in the sedimentation basin
CaO+?H
2O=Ca(OH)
2
3, desulfuration principle in the desulfurizing tower
SO-
2+H
2O=H-
2SO
3
Ca(OH)
2+H-
2SO
3=CaSO
3+2H
2O
SO
3 2-+SO-
2+?H
2O=2HSO
3 -
H-SO
3 -+1/2O
2=?SO
4 2-+H
+
Ca
2++SO
4 2-+2H
2O=CaSO
4·2?H
2O
Compared with prior art, this technology is with two kinds of method combinations described in the background technology.Because of having added lime stone in the coal, this technology has been finished sweetening process twice, and preceding two kinds of desulfuration efficiency height of more above-mentioned existing sulfur removal technology be 200810246127.6 disclosed a kind of desulfuration method of bioler complete process than application number again, and desulfurized effect are good; Wide, the low price in the raw materials used lime stone of this project source, the equipment that needs in the whole technology is few, and technology is simple, investment cost is low.
Technology of the present invention has following characteristics: 1, a certain proportion of agstone of admixture in the coal; And calcium sulfur ratio is greater than 1; 2, in boiler, finish partial desulfurization; 3, utilize the desulfurization again in desulfurizing tower of flushing cinder water; Water behind the flushing cinder is alkalescence, does not need to add alkaline matter in flushing cinder water again, again independently desulphurization system need not be set so this part flushing cinder water is the desulfurizing agent of desulfurizing tower.4, except that admixture lime stone in coal, do not need to add alkaline matter anywhere; 5, flushing cinder water circulation use only needs irregularly to replenish low amounts of water.
Description of drawings
Fig. 1 is a process chart of the present invention,
Among the figure: 1-boiler furnace, 2-desulfurizing tower, 3-flushing cinder pond, 4-desulfurization sedimentation basin, 5-desulfuration recycle pump.
The specific embodiment
As schematically shown in Figure 1, be example with the 10T boiler, according to the coal consumption of boiler and the sulfur content in the coal, agstone mixed add boiler furnace 1 in the coal together, calcium element sulphur amount of substance ratio is 1.3.In burner hearth 1, sulfur dioxide and agstone generation chemical reaction that coal combustion produces are finished about 80% sweetening process.The solids that reaction generates is flushed in the desulfurization sedimentation basin 4 by water with slag; Remaining 20% sulfur dioxide enters desulfurizing tower 2 with flue gas.In desulfurization sedimentation basin 4, the solids that slag that precipitates and reaction produce is regularly gone out by manpower or mechanical chipping, the slurries that lime is contained on top are squeezed into desulfurizing tower 2 by desulfuration recycle pump 5, contact with the upstream flue gas in bottom, and desulphurization reaction takes place once more.Reacted slurries fall at the bottom of the tower from the overfall overflow to the flushing cinder pond.In desulfurizing tower 2, understand some gypsum or other sediment and accumulate in tower bottom and near tower wall, (the regional heating phase only is 4 months because this technology is used for the flue gas desulfurization of winter heating and school's water supply boiler, school's semester is 5 months), continuous operating time is short, so during this period, deposit is not enough to stop up overfall, can be during heating period finishes back or school and has a holiday or vacation time of concentration clear up.
Detect data and see the following form in (10T water supply boiler), when directly discharging, the sulfur content 2316mg/Nm of chimney inlet flue duct place
2, desulfuration efficiency reaches 87% after the desulfurization.
The detection position | Coal as fired basis sulfur content | Behind the air-introduced machine | The chimney inlet flue |
Sulfur content | |||
2% | 681mg/Nm 2 | 275 mg/Nm 2 |
With the 20T boiler is example, according to the coal consumption of boiler and the sulfur content in the coal, agstone mixed adds boiler furnace 1 in the coal together, and calcium element sulphur amount of substance ratio is 1.4.All the other technological operations are with embodiment 1, and it detects effect such as following table:
When directly discharging, the sulfur content 2350mg/Nm of chimney inlet flue duct place
2, after the desulfurization:
The detection position | Coal as fired basis sulfur content | Behind the air-introduced machine | The chimney inlet flue |
Sulfur content | |||
2% | 640mg/Nm 2 | 223 mg/Nm 2 |
Desulfuration efficiency reaches 91%.
With the 20T boiler is example, according to the coal consumption of boiler and the sulfur content in the coal, agstone mixed adds boiler furnace 1 in the coal together, and calcium element sulphur amount of substance ratio is 1.4.All the other technological operations are with embodiment 1, and it detects effect such as following table:
When directly discharging, the sulfur content 2410mg/Nm of chimney inlet flue duct place
2, after the desulfurization:
The detection position | Coal as fired basis sulfur content | Behind the air-introduced machine | The chimney inlet flue |
Sulfur content | |||
2% | 670mg/Nm 2 | 243 mg/Nm 2 |
Desulfurization degree is 90%.
Claims (1)
1. small heater or short period operation boiler flue gas desulfurization process, it is characterized in that and to add burner hearth together after agstone and the coal mixing, wherein the ratio of the amount of calcium, sulfur material is 1.3-1.5, in burner hearth, sulfur dioxide and agstone generation chemical reaction that coal combustion produces, finish main sweetening process, the solids that reaction generates is flushed in the desulfurization sedimentation basin by water with slag; The sulfur dioxide that the residue element sulphur generates enters desulfurizing tower with flue gas; In the desulfurization sedimentation basin, the slag cleaning that precipitates, the slurries that lime is contained on top are squeezed into desulfurizing tower by desulfuration recycle pump, contact with the upstream flue gas in bottom, desulphurization reaction takes place once more, reacted slurries fall at the bottom of the tower from the overfall overflow to the flushing cinder pond, and so far whole element sulphurs is removed collection fully.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011100435550A CN102120128A (en) | 2011-02-23 | 2011-02-23 | Flue gas desulfurization process for small-sized heating or short-running-cycle boiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011100435550A CN102120128A (en) | 2011-02-23 | 2011-02-23 | Flue gas desulfurization process for small-sized heating or short-running-cycle boiler |
Publications (1)
Publication Number | Publication Date |
---|---|
CN102120128A true CN102120128A (en) | 2011-07-13 |
Family
ID=44248848
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2011100435550A Pending CN102120128A (en) | 2011-02-23 | 2011-02-23 | Flue gas desulfurization process for small-sized heating or short-running-cycle boiler |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102120128A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103861440A (en) * | 2013-12-26 | 2014-06-18 | 张明鑫 | Layer burning furnace desulfurization and denitrification flue gas treatment technology |
CN112082390A (en) * | 2020-06-19 | 2020-12-15 | 湖南博一环保科技有限公司 | Process for performing rotary kiln flue gas desulfurization by using large-flow slag flushing water |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0833826A (en) * | 1994-07-25 | 1996-02-06 | Babcock Hitachi Kk | Treatment of boiler waste combustion gas for coal fired thermal power plant and device therefor |
EP0860197A1 (en) * | 1997-02-19 | 1998-08-26 | Mitsubishi Heavy Industries, Ltd. | Process for treating exhaust gas and exhaust gas treating equipment |
CN1442227A (en) * | 2002-03-06 | 2003-09-17 | 国家电站燃烧工程技术研究中心 | Method and system of calcining-circulating fluidized bed desulfur in reaction integration furnace |
CN1919420A (en) * | 2006-08-14 | 2007-02-28 | 武建国 | Coal-burning boiler limestone dual-purpose desulfurizing method |
CN201454402U (en) * | 2009-07-13 | 2010-05-12 | 师少杰 | Wet flue gas desulfurization device by taking sodium alkali as desulfurizer |
-
2011
- 2011-02-23 CN CN2011100435550A patent/CN102120128A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0833826A (en) * | 1994-07-25 | 1996-02-06 | Babcock Hitachi Kk | Treatment of boiler waste combustion gas for coal fired thermal power plant and device therefor |
EP0860197A1 (en) * | 1997-02-19 | 1998-08-26 | Mitsubishi Heavy Industries, Ltd. | Process for treating exhaust gas and exhaust gas treating equipment |
CN1442227A (en) * | 2002-03-06 | 2003-09-17 | 国家电站燃烧工程技术研究中心 | Method and system of calcining-circulating fluidized bed desulfur in reaction integration furnace |
CN1919420A (en) * | 2006-08-14 | 2007-02-28 | 武建国 | Coal-burning boiler limestone dual-purpose desulfurizing method |
CN201454402U (en) * | 2009-07-13 | 2010-05-12 | 师少杰 | Wet flue gas desulfurization device by taking sodium alkali as desulfurizer |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103861440A (en) * | 2013-12-26 | 2014-06-18 | 张明鑫 | Layer burning furnace desulfurization and denitrification flue gas treatment technology |
CN103861440B (en) * | 2013-12-26 | 2016-01-20 | 张明鑫 | Layer burning stove desulfurization removing nitric flue gas treating process |
CN112082390A (en) * | 2020-06-19 | 2020-12-15 | 湖南博一环保科技有限公司 | Process for performing rotary kiln flue gas desulfurization by using large-flow slag flushing water |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
RU2474762C2 (en) | Method (versions) and system of air pollution reduction | |
CN101574615B (en) | Desulfurizing method and synergistic agent thereof | |
CN100384518C (en) | Smoke desulfidation from amino bialkali method | |
CN105498514A (en) | Cement kiln flue gas desulfurization system and method | |
US10144661B2 (en) | System and method for softening water for use in a scrubber | |
CN101837241A (en) | Desulfuration process and device thereof | |
CN105561753A (en) | Novel dry process cement kiln flue gas online desulfurization device and technology | |
CN102794092A (en) | Fire coal flue gas wet method energy-saving desulfurization method | |
CN100448512C (en) | Coal burning boiler flue gas desulfurization method and device | |
CN107311216A (en) | The method that semi-dry desulphurization ash is utilized under wet fuel gas desulfurizing technology | |
CN105148716A (en) | Flue gas desulfurization tower for coal-fried boilers | |
CN102786198A (en) | Method for slime fluidized bed boiler desulphurization of sludge and white slime of papermaking factory | |
CN102847400A (en) | Flue gas dedusting and desulfurization system for medium-small size coal fired boiler | |
CN102120128A (en) | Flue gas desulfurization process for small-sized heating or short-running-cycle boiler | |
CN103449597A (en) | Hot stifle backwater treatment device and method of converter slag | |
CN103301735B (en) | Flue gas desulphurization and dust removal agent for small and medium sized boilers | |
CN201558666U (en) | Fume desulfurizing equipment for fuel furnace | |
CN202478813U (en) | Wet flue gas desulphurization system used for coal-fired power plant boiler | |
TWI457167B (en) | Apparatus for flue gas desulfurization with zero emission using system for recovery and recycle of magnesium hydroxide | |
CN100431673C (en) | Method and equipment for neutralizing acidic water after desulfurization of coal burning gas | |
CN102553425A (en) | Wet flue gas denitrifying system for coal fired power plant boiler | |
CN102225306A (en) | Slag-sodium alkali dual-alkali wet type flue gas desulfurization process | |
CN206853449U (en) | A kind of industrial smoke environment protection desulphurization device | |
CN2907848Y (en) | Device for changing sulfur dioxide in waste gas into product by circulation using magnesium oxide | |
CN1631493A (en) | Wet method fume gas desulfurizing method and device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
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 |
Application publication date: 20110713 |