CN105561753A - Novel dry process cement kiln flue gas online desulfurization device and technology - Google Patents

Novel dry process cement kiln flue gas online desulfurization device and technology Download PDF

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Publication number
CN105561753A
CN105561753A CN201610051862.6A CN201610051862A CN105561753A CN 105561753 A CN105561753 A CN 105561753A CN 201610051862 A CN201610051862 A CN 201610051862A CN 105561753 A CN105561753 A CN 105561753A
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CN
China
Prior art keywords
flue gas
dry process
unit
kiln flue
rotary kiln
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CN201610051862.6A
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Chinese (zh)
Inventor
孔学标
赵晓平
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Nanjing Shenghuo Environmental Technology Co Ltd
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Nanjing Shenghuo Environmental Technology Co Ltd
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Priority to CN201610051862.6A priority Critical patent/CN105561753A/en
Publication of CN105561753A publication Critical patent/CN105561753A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/76Gas phase processes, e.g. by using aerosols
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/40Alkaline earth metal or magnesium compounds
    • B01D2251/404Alkaline earth metal or magnesium compounds of calcium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • B01D2257/302Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/10Gas phase, e.g. by using aerosols

Abstract

The invention discloses a novel dry process cement kiln flue gas online desulfurization device. The novel dry process cement kiln flue gas online desulfurization device is characterized in that the device comprises a decomposing unit and a rotational flow reactor which is connected with the decomposing unit and a vapor unit; the rotational flow reactor is connected with a kiln tail waste gas pipeline through a pipeline; the kiln tail waste gas pipeline is connected with a humidifying tower which is connected with a desulfurization gypsum drying unit and a dust collecting unit. According to the novel dry process cement kiln flue gas online desulfurization device and technology, the technology is improved according to the defects of a desulfurization technology which is commonly adopted currently, Ca(OH)2 generated by reacting the main component CaO generated in a dry process kiln pre-heater C5 with vapor serves as a desulfurization agent, and the desulfurization efficiency is higher compared with that of an original desulfurization agent limestone; besides, technological equipment and materials of an existing production line are fully utilized, and the requirement of the desulfurization technology can be met.

Description

A kind of new dry process rotary kiln flue gas on-line desulphurization instrument and supplies
Technical field
The present invention relates to a kind of new dry process rotary kiln flue gas on-line desulphurization instrument and supplies.
Background technology
At present, dry-process cement rotary kiln flue gas desulfurization generally all adopts desulfurization method of limestone-gypsum technique, and its process is that lime stone grinding in wet ball grinding is become fine powder, stirs, send absorption tower to water pump in serum pot; Containing SO 2kiln in flue gas booster fan deliver to reaction tower, due to SO 2soluble in water, adsorbed by spray water mist and moisture film in reaction tower, form sulfurous acid solution, with the lime stone in reaction tower and CaCO 3reaction generates CaSO 3sediment, then sending oxygen blower fan feeding partial air to enter in reaction solution, make CaSO 3oxidation generates CaSO 4product, is finally formed industry byproduct by after the process of vacuum belt filter.
The sulfur method of limestone-gypsum method is: SO 2+ H 2o → H 2sO 3
H 2SO 3+CaCO 3+O 2→CaSO 4+H 2O+CO 2
As shown in Figure 1, desulfurization method of limestone-gypsum technological process is as follows: desulfurization method of limestone-gypsum technique is by the SO in kiln exit gas 2be only absorbed by the water in absorption tower and with the agstone (main component: CaCO that suspends in water liquid 3) produce chemical reaction, finally generate CaSO 4with harmless CO 2.Concrete enforcement technical scheme is as follows: containing SO 2kiln exit gas by after nonaqueous dust cleaner dedusting, enter absorption tower 19; Or discharge because directly entering chimney 20 by bypass duct when absorption tower 19 is overhauled.Desulfurizing agent lime stone, through elevator 27, grinds to form fine powder by wet ball grinding 21, after stirring, is injected to absorption tower 19 by high-pressure pump 23 in limestone slurry flow container 22 with water.Kiln tail gas injects absorption tower under the effect of booster fan 24, and in water tank 28, fresh water (FW) forms atomized water under the effect of water pump 25 and atomizer, absorbs the SO in kiln tail gas 2generate CaSO 3, then after the oxygenation process of oxidation fan 26, CaSO 3be oxidized by oxygen and generate available industry byproduct CaSO 4, industry byproduct CaSO 4discharge 31 through gypsum excavationg pump 29, cyclone 30 and filter, small part waste liquid is through the outer row of outer row's mouth 32.
At present, mainly there is following shortcoming in desulfurization method of limestone-gypsum technique: 1, technique is more complicated; 2, equipment investment is large; 3, operating cost is high; 4, secondarily polluted water is produced.
Summary of the invention
Dry-process cement rotary kiln flue gas desulfurization technique of the present invention, for the shortcoming existed in the existing sulfur removal technology generally adopted, carries out process modification, utilizes dry method kiln preheater C 5in the main component CaO that produced and steam react the Ca (OH) generated 2as desulfurizing agent, than former desulfurizing agent lime stone, desulfuration efficiency is higher, and in addition, the present invention makes full use of process equipment and the material of existing production line, just can meet sulfur removal technology requirement.
For solving above technical problem, the technical solution used in the present invention is: a kind of new dry process rotary kiln flue gas on-line desulphurization equipment, it is characterized in that, comprise resolving cell and Cyclonic reactor, described Cyclonic reactor is conjunctive decomposition unit and steam unit respectively, described Cyclonic reactor connects kiln tail gas pipeline by pipeline, and described kiln tail gas pipeline is connected with conditioning Tower, and described conditioning Tower connects the dry unit of desulfurated plaster and the unit that gathers dust respectively.
Preferably, described resolving cell comprises dry method kiln preheater Sum decomposition stove, described dry method kiln preheater is set to Pyatyi preheater, preheater at different levels is connected by heat exchanger tube, level V preheater connects Cyclonic reactor by control valve, and the gas that described dore furnace and preheater at different levels produce enters exhaust piping.
Preferably, described steam unit comprises boiler of power generation by waste heat, steam control valve and shower nozzle, and boiler of power generation by waste heat enters Cyclonic reactor, described nozzle connecting water receiving reforming regulating valve by connecting shower nozzle.
Preferably, described kiln tail gas pipeline is connected with conditioning Tower by high-temperature blower.
Preferably, described conditioning Tower is provided with oxygen increasing equipment, and described oxygen increasing equipment comprises oxidation pond and oxidation fan, and described oxidation pond connects oxidation fan.
Preferably, the dry unit of described desulfurated plaster comprises cyclone and vacuum belt filter, and described conditioning Tower connects cyclone by gypsum excavationg pump, and described cyclone connects vacuum belt filter.
Preferably, the unit that gathers dust described in comprises dust-precipitator and dust collecting fan.
Preferably, described dust-precipitator is bag filter.
A kind of new dry process rotary kiln flue gas on-line desulphurization technique, it is characterized in that, raw material are decomposed to form CaO in resolving cell, and the steam that CaO and steam unit are introduced reacts and generates Ca (OH) in Cyclonic reactor 2aerosol is as desulfurizing agent, and desulfurizing agent absorbs SO in kiln tail gas pipeline and conditioning Tower 2, generate CaSO 3, CaSO 3carry out oxygenation process in conditioning Tower by oxygen increasing equipment, form CaSO 4, CaSO 4dry through the dry unit of desulfurated plaster, the unit that gathers dust carries out the separation of dirt gas.
A kind of new dry process rotary kiln flue gas on-line desulphurization instrument and supplies provided by the present invention, has following beneficial effect:
1, a kind of new dry process rotary kiln flue gas on-line desulphurization instrument and supplies of the present invention takes full advantage of existing equipment and the material of existing new dry process rotary kiln system, and present invention process is more simple, efficient.
2, a kind of new dry process rotary kiln flue gas on-line desulphurization instrument and supplies of the present invention is by dry method kiln preheater C 5in (level V whirlwind preheating cylinder), main component CaO is as desulfurizing agent, and contrasting former sulfur removal technology need prepare desulfurizing agent agstone with wet ball grinding; New technology adopts the exhaust emission system equipment of the preheating cyclone in former technique to realize Ca (OH) 2to SO 2absorption, former technique separately need establish absorption tower, both contrast, investment cost of the present invention reduces greatly.
3, a kind of new dry process rotary kiln flue gas on-line desulphurization instrument and supplies of the present invention is by desulfurizing agent Ca (OH) 2main reactant CaO can directly obtain from original system, and desulfurization method of limestone-gypsum technique desulfurizing agent agstone need with wet ball grinding carry out grinding obtain, operating cost reduces greatly.
4, a kind of new dry process rotary kiln flue gas on-line desulphurization instrument and supplies of the present invention reacts the Ca (OH) generated by CaO and water 2as desulfurizing agent, reaction speed is very fast, and Ca (OH) 2with SO 2reaction also very fast, reaction speed is faster.And the desulfurizing agent lime stone in former technique need at SO 2be only absorbed by the water, form H 2sO 3after could react with lime stone, the concentration of reaction speed and reactant has much relations, and reaction speed is slower.Therefore the more former process efficiency of its desulfuration efficiency of the present invention is higher.
5, a kind of new dry process rotary kiln flue gas on-line desulphurization instrument and supplies of the present invention is by desulfurizing agent Ca (OH) 2reactant adopt vapor state, which not only improves reaction speed, simultaneously also greatly saved water consumption, and Ca (OH) 2absorption SO 2the CaSO formed 4online, produce industry byproduct and directly can be used as manufacture of cement set retarder.
Accompanying drawing explanation
Fig. 1 is the desulfurization method of limestone-gypsum process chart of background technology of the present invention;
Fig. 2 is flow chart of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
As shown in Figure 2, a kind of new dry process rotary kiln flue gas on-line desulphurization equipment, it is characterized in that, comprise resolving cell and Cyclonic reactor, described Cyclonic reactor is conjunctive decomposition unit and steam unit respectively, described resolving cell comprises dry method kiln preheater Sum decomposition stove 1, described dry method kiln preheater is set to Pyatyi preheater, preheater at different levels is connected by heat exchanger tube, level V preheater 2 connects Cyclonic reactor 6 by control valve 3, the gas that described dore furnace 1 and preheater at different levels produce enters exhaust piping 8, described steam unit comprises boiler of power generation by waste heat, steam control valve 4 and shower nozzle 5, boiler of power generation by waste heat enters Cyclonic reactor by connecting shower nozzle, described nozzle connecting water receiving reforming regulating valve, described Cyclonic reactor 6 connects kiln tail gas pipeline 8 by pipeline 7, described kiln tail gas pipeline 8 is connected with conditioning Tower 10 by high-temperature blower 9, described conditioning Tower 10 is provided with oxygen increasing equipment, described oxygen increasing equipment comprises oxidation pond and oxidation fan 11, described oxidation pond connects oxidation fan 11, described conditioning Tower connects the dry unit of desulfurated plaster and the unit that gathers dust respectively, the dry unit of described desulfurated plaster comprises cyclone and vacuum belt filter, described conditioning Tower connects cyclone 13 by gypsum excavationg pump 12, described cyclone 13 connects vacuum belt filter 14, the described unit that gathers dust comprises dust-precipitator 16 and dust collecting fan 17, described dust-precipitator is bag filter.
A kind of new dry process rotary kiln flue gas on-line desulphurization technique, it is characterized in that, raw material are decomposed to form CaO in resolving cell, and the steam that CaO and steam unit are introduced reacts and generates Ca (OH) in Cyclonic reactor 2aerosol is as desulfurizing agent, and desulfurizing agent absorbs SO in kiln tail gas pipeline and conditioning Tower 2, generate CaSO 3, CaSO 3carry out oxygenation process in conditioning Tower by oxygen increasing equipment, form CaSO 4, CaSO 4dry through the dry unit of desulfurated plaster, the unit that gathers dust carries out the separation of dirt gas.
Implementation process of the present invention is as follows: raw material enter resolving cell through air conveyer flume, described resolving cell comprises dry method kiln preheater Sum decomposition stove 1, described dry method kiln preheater is set to Pyatyi preheater, preheater at different levels is connected by heat exchanger tube, raw material carry out heat exchange at first order preheater to level V preheater 2 and heat exchanger tube, and dore furnace 1 makes raw material carry out CaCO 3be decomposed to form CaO and CO 2the material that wherein level V preheater 2 is collected is the material after the effect of dry method kiln preheater Sum decomposition stove 1, its main chemical compositions is CaO, the carbon that dore furnace and preheater at different levels produce, nitrogen, sulfur oxide gas enter kiln tail gas pipeline 8, level V preheater 2(main component CaO) to be entered in Cyclonic reactor 6 by the measure control of control valve 3 and steam control valve 4 and carry out chemical reaction, produce Ca (OH) 2aerosol enters exhaust piping 8 by connecting pipe 7, Ca (OH) in exhaust piping 8 and conditioning Tower 10 2with the SO in waste gas 2carry out reaction and generate CaSO 3, CaSO 3the moisture film absorption be humidified in tower 10 enters oxidation pond, CaSO in oxidation pond 3caSO is formed by continuation oxidation 4crystallization water compound, be commonly called as desulfurization stone, desulfurated plaster enters cyclone 13 by gypsum excavationg pump 12, water and desulfurated plaster initial gross separation is made by cyclone 13, described cyclone 13 connects vacuum belt filter 14, realizes being separated again of water and desulfurated plaster by vacuum belt filter 14, forms the industry byproduct desulfurated plaster with practical value, other waste gas through desulfurization process enters dust-precipitator 16 and carries out the separation of dirt gas, and clean gas enters chimney 18 by dust collecting fan 17 and enters air.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.

Claims (10)

1. a new dry process rotary kiln flue gas on-line desulphurization equipment, it is characterized in that, comprise resolving cell and Cyclonic reactor, described Cyclonic reactor is conjunctive decomposition unit and steam unit respectively, described Cyclonic reactor connects kiln tail gas pipeline by pipeline, described kiln tail gas pipeline is connected with conditioning Tower, and described conditioning Tower connects the dry unit of desulfurated plaster and the unit that gathers dust respectively.
2. a kind of new dry process rotary kiln flue gas on-line desulphurization equipment according to claim 1, it is characterized in that, described resolving cell comprises dry method kiln preheater Sum decomposition stove, described dry method kiln preheater is set to Pyatyi preheater, preheater at different levels is connected by heat exchanger tube, and level V preheater connects Cyclonic reactor by control valve.
3. a kind of new dry process rotary kiln flue gas on-line desulphurization equipment according to claim 2, it is characterized in that, described steam unit comprises boiler of power generation by waste heat, steam control valve and shower nozzle, boiler of power generation by waste heat enters Cyclonic reactor, described nozzle connecting water receiving reforming regulating valve by connecting shower nozzle.
4. a kind of new dry process rotary kiln flue gas on-line desulphurization equipment according to claim 1, it is characterized in that, described kiln tail gas pipeline is connected with conditioning Tower by high-temperature blower.
5. a kind of new dry process rotary kiln flue gas on-line desulphurization equipment according to claim 4, it is characterized in that, described conditioning Tower is provided with oxygen increasing equipment, and described oxygen increasing equipment comprises oxidation pond and oxidation fan, and described oxidation pond connects oxidation fan.
6. a kind of new dry process rotary kiln flue gas on-line desulphurization equipment according to claim 1, it is characterized in that, the dry unit of described desulfurated plaster comprises cyclone and vacuum belt filter, and described conditioning Tower connects cyclone by gypsum excavationg pump, and described cyclone connects vacuum belt filter.
7. a kind of new dry process rotary kiln flue gas on-line desulphurization equipment according to claim 1, is characterized in that, described in the unit that gathers dust comprise dust-precipitator and dust collecting fan.
8. a kind of new dry process rotary kiln flue gas on-line desulphurization equipment according to claim 7, it is characterized in that, described dust-precipitator is bag filter.
9. a kind of new dry process rotary kiln flue gas on-line desulphurization technique according to claim 2, is characterized in that, the gas that described dore furnace and preheater at different levels produce enters exhaust piping.
10. a new dry process rotary kiln flue gas on-line desulphurization technique, it is characterized in that, raw material are decomposed to form CaO in resolving cell, and the steam that CaO and steam unit are introduced reacts and generates Ca (OH) in Cyclonic reactor 2aerosol is as desulfurizing agent, and desulfurizing agent absorbs SO in kiln tail gas pipeline and conditioning Tower 2, generate CaSO 3, CaSO 3carry out oxygenation process in conditioning Tower by oxygen increasing equipment, form CaSO 4, CaSO 4dry through the dry unit of desulfurated plaster, the unit that gathers dust carries out the separation of dirt gas.
CN201610051862.6A 2016-01-26 2016-01-26 Novel dry process cement kiln flue gas online desulfurization device and technology Pending CN105561753A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731645A (en) * 2017-03-09 2017-05-31 徐州贝克福尔节能环保技术有限公司 The facility and method of a kind of preheater inside self-loopa desulfurization
CN107215587A (en) * 2017-07-12 2017-09-29 合肥中亚环保科技有限公司 A kind of cement flue Dust produces the pretreatment feed conveying device of desulfurizing agent
CN108097028A (en) * 2017-12-26 2018-06-01 重庆市新嘉南建材有限责任公司 Spontaneous desulfurizer and method
CN112807952A (en) * 2020-12-29 2021-05-18 于庆起 High-temperature raw material on-line desulfurization technology for cement kiln system

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CN1480245A (en) * 2002-09-06 2004-03-10 中国环境科学研究院 Method of flue gas desulfurization by through steam to toransport materiel
CN1942400A (en) * 2004-04-16 2007-04-04 Flsmidth公司 Method and apparatus for hydration of a particulate or pulverulent material containing cao, hydrated product, and use of the hydrated product
CN102806006A (en) * 2012-08-30 2012-12-05 太原重工股份有限公司 Flue gas desulfurization purifying system
CN104587826A (en) * 2015-02-09 2015-05-06 安徽海螺建材设计研究院 Novel dry-process cement kiln tail flue gas desulfurization system and desulfurization process thereof

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CN85106271A (en) * 1984-12-28 1986-07-02 日立造船株式会社 The method and system of purifying exhaust air
US4666690A (en) * 1985-12-20 1987-05-19 Foster Wheeler Development Corporation Method for removing sulfur dioxide from flue gases
CN1398660A (en) * 2001-07-24 2003-02-26 北京现代绿源环保技术有限公司 Semi-wet flue gas desulfurizing treatment method and system
CN1480245A (en) * 2002-09-06 2004-03-10 中国环境科学研究院 Method of flue gas desulfurization by through steam to toransport materiel
CN1942400A (en) * 2004-04-16 2007-04-04 Flsmidth公司 Method and apparatus for hydration of a particulate or pulverulent material containing cao, hydrated product, and use of the hydrated product
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731645A (en) * 2017-03-09 2017-05-31 徐州贝克福尔节能环保技术有限公司 The facility and method of a kind of preheater inside self-loopa desulfurization
CN107215587A (en) * 2017-07-12 2017-09-29 合肥中亚环保科技有限公司 A kind of cement flue Dust produces the pretreatment feed conveying device of desulfurizing agent
CN108097028A (en) * 2017-12-26 2018-06-01 重庆市新嘉南建材有限责任公司 Spontaneous desulfurizer and method
CN112807952A (en) * 2020-12-29 2021-05-18 于庆起 High-temperature raw material on-line desulfurization technology for cement kiln system

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