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 PDF

Info

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
Application number
CN2011100435550A
Other languages
Chinese (zh)
Inventor
裴根权
荆文华
赵小飞
朱红波
周艳姣
赵根峰
裴晓君
蔺伟飞
曹月霞
郭章红
江冰
黄卫芬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANXI GERUI ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
Original Assignee
SHANXI GERUI ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHANXI GERUI ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd filed Critical SHANXI GERUI ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
Priority to CN2011100435550A priority Critical patent/CN102120128A/en
Publication of CN102120128A publication Critical patent/CN102120128A/en
Pending legal-status Critical Current

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

Small heater or short period operation boiler flue gas desulfurization process
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
Embodiment 1
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 duct
Sulfur content
2% 681mg/Nm 2 275 mg/Nm 2
Embodiment 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 duct
Sulfur content
2% 640mg/Nm 2 223 mg/Nm 2
Desulfuration efficiency reaches 91%.
Embodiment 3
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 duct
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.
CN2011100435550A 2011-02-23 2011-02-23 Flue gas desulfurization process for small-sized heating or short-running-cycle boiler Pending CN102120128A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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