CN1105900A - Simple dry desulfurizating apparatus - Google Patents

Simple dry desulfurizating apparatus Download PDF

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Publication number
CN1105900A
CN1105900A CN 94117098 CN94117098A CN1105900A CN 1105900 A CN1105900 A CN 1105900A CN 94117098 CN94117098 CN 94117098 CN 94117098 A CN94117098 A CN 94117098A CN 1105900 A CN1105900 A CN 1105900A
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China
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mentioned
water
collect plant
dust collect
desulfurizating
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CN 94117098
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CN1043128C (en
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一濑利光
太田英明
坂本康一
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/50—Sulfur oxides
    • B01D53/508—Sulfur oxides by treating the gases with solids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/006—Layout of treatment plant

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
  • Chimneys And Flues (AREA)

Abstract

To provide a desulfurization apparatus which performs its function efficiently, does not produce waste water to be discharged, and is inexpensive. A desulfurization agent 2 is fed into a boiler 10 to make primary-stage desulfurization take place therein. The apparatus is equipped with a dust collector 20 for removing dust from the gases discharged from the boiler 10, with a water sprinkler 40 for removing sulfur oxides from the gases discharged from the dust collector 20, and with a spray drier 30 which is disposed in the flue between the boiler 10 and the dust collector 20 and sprays in the flue part 43 of the discharged water from the water sprinkler 40. The collected matter 21 at the dust collector 20 may be mixed with part 63 of the discharged water, fed to an upstream point of the spray drier 30, or conveyed to the water sprinkler 40.

Description

Simple dry desulfurizating apparatus
The present invention relates to from the exhaust of the burner of sulfur-bearings such as coal combustion, heavy oil (S) fuel, reduce oxysulfide SO xThe simple dry desulfurizating apparatus of discharging.
The example that desulfur technology is arranged earlier shown in Fig. 5.In Fig. 5, the sulphur in the fuel 1 (S) part is oxysulfide SO in boiler 10 xForm, in boiler 10, carry out following desulfuration in furnace with lime stone 2.
In boiler 10, carry out containing gypsum CaSO in the exhaust behind the desulfuration in furnace 4, ashes etc., but these materials reclaim by dust collect plant 20, handle by other approach.
In addition, owing to also contain unreacted quick lime CaO in the exhaust of boiler 10 outlets,, atomizing drier 30 is set carries out the interior desulfurization of flue in order to reuse its purpose.In atomizing drier 30, spray water 31, to produce following desulphurization reaction.
Gu this reaction is gas/liquid reactions → liquid/reaction,,, adopt bag dust filter mostly as common dust arrester 20 in order to promote this reaction.
As mentioned above, carry out flue desulfurization according to the reaction shown in the above-mentioned reaction equation, but the poor efficiency of gas/liquid reactions wherein.It is influenced by the quality of water spray situation, though be sprayed into goodish vaporific, at H 2O drips and SO 2Gas contact aspect also can be restricted, thereby requirement can be carried out this reaction effectively.
Solve one of countermeasure as it, normally in dust collect plant, used bag dust filter in the past, in case particle stops on filter cloth surface, it just reacts, but, if this mechanical device then passes through can not produce desulfurization performance under the situation of the non-stop dust collect plant of face at gas at this particles such as using electrostatic (electric dust) precipitator EP.
Problem of the present invention provides a kind of above-mentioned shortcoming and desulfurization efficiently that can overcome in the former desulfurizer, again can be with the cheap desulfurizer of no drainage pattern work.
The 1st aspect of the present invention is in order to solve above-mentioned problem, a kind of simple dry desulfurizating apparatus is provided, its constitutive characteristic is, has the combustion furnace that can in stove, drop into desulfurizing agent, thereby make the atomizing drier of its desulfurization to the exhaust water spray that this combustion furnace comes out, and from the gas that this drier is discharged, remove in the simple dry desulfurizating apparatus of dust collect plant of dust, the water dissemination apparatus of above-mentioned dust collect plant exhaust sulphur oxide is removed in setting, by the above-mentioned atomizing drier in the flue that is configured between above-mentioned combustion furnace and the above-mentioned dust collect plant, the part of the draining that will come out from above-mentioned water dissemination apparatus, atomisation in above-mentioned flue.
As this water dissemination apparatus, also can adopt the device of washing type.
According to this desulfurizer, then can be by means of the water dissemination apparatus that is configured in the dust collect plant downstream side with oxysulfide SO xAlmost all be absorbed in the water, by the atomizing drier spraying in the flue of this draining before dust collect plant made its evaporation then.
So, by containing H 2SO 3(H 2SO 4Solid) spray water and the liquid/reaction of unreacted CaO in the flue, carry out the interior desulfurization of effective flue.
The 2nd aspect of the present invention provides a kind of simple dry desulfurizating apparatus, its formation is, except the desulfurizer of the 1st aspect of the invention described above constitutes, also will be with the part of the draining of coming out from above-mentioned water dissemination apparatus, after the ash mixing that obtains by above-mentioned dust collect plant, with above-mentioned atomizing drier spraying.Ashes that is obtained by dust collect plant and the draining of coming out from the water dissemination apparatus are mixed together and, then it are imported the atomizing drier with pulverizer simultaneously with its pulverizing.This formation can promote desulphurization reaction in the flue that the unreacted CaO from boiler causes.
The 3rd aspect of the present invention provides a kind of simple dry desulfurizating apparatus, its formation is, except the desulfurizer of the invention described above the 1st aspect constitutes, also have the desulfurizing agent sprayer unit that ash that above-mentioned dust collect plant is obtained imports and scatters is set on the flue before above-mentioned atomizing drier.
According to the desulfurizer of this formation, therefore dust-collector and import respectively in the flue before the atomizing drier from the draining of water dissemination apparatus can supply with dust-collector quantity-unlimitingly, carries out sufficient flue desulfurization.
The 4th aspect of the present invention provides a kind of simple dry desulfurizating apparatus, and its formation is that except the desulfurizer formation of the invention described above the 1st aspect, also the ash that above-mentioned dust collect plant is obtained is supplied with above-mentioned water dissemination apparatus.
According to this formation, infeeded the water dissemination apparatus owing to contain the ash of the unreacted CaO that reclaims by dust collect plant, therefore, the pH that flows through the water of water dissemination apparatus rises (acidity weakens) SO xUptake increases.
In such cases, infeed the water dissemination apparatus after ash can being pulverized, so above-mentioned reaction further improves.
Reaction product (the CaSO that generates in the water dissemination apparatus 4Deng), can be used as slurries in dust collect plant and upper reaches spraying thereof, make it dry, in dust collect plant, only reclaim solid state component.In this slurries sprayer, from the unreacted CaO of boiler and the H in the slurries 2SO 3(H 2SO 4) carry out solid-liquid reaction and desulfurization.
Below specify simple dry desulfurizating apparatus of the present invention in accordance with the embodiments illustrated.
Fig. 1 is the desulfurizer system diagram of expression the present invention the 1st embodiment.
Fig. 2 is the desulfurizer system diagram of expression the present invention the 2nd embodiment.
Fig. 3 is the desulfurizer system diagram of expression the present invention the 3rd embodiment.
Fig. 4 is the desulfurizer system diagram of expression the present invention the 4th embodiment.
Fig. 5 is the system diagram of expression prior art desulfurizer example.
Embodiment 1
At first the 1st embodiment shown in Fig. 1 is described.
In Fig. 1, the sulphur in the fuel 1 (S) is to cause to produce oxysulfide SO in boiler 10 xReason, identical with prior art, in boiler 10, drop into lime stone 2, carry out primary desulfuration in furnace thus.
Contain the gypsum CaSO behind the desulfuration in furnace 4, ash etc. exhaust, import control of dust in the dust collect plant 20.Regenerant 21 is disposed by other approach.
In dust arrester 20 exits, dispose washing type water dissemination apparatus 40, the oxysulfide SO that contains in the exhaust that dust collect plant 20 is come out xBe absorbed in the water.Infeed water 41 in the water dissemination apparatus 40, and, SO absorbed xAfter water as (H 2SO 4) be stored in the jar of bottom, wherein a part 42 importing water dissemination apparatus recycle, and other parts 43 import in the atomizing drier 30 of the last flow flue that is in dust collect plant 20.Because water and SO herein 2Therefore the material that gas has reacted is sprayed, and only just can reach flue desulfurization efficiently by spray water and from the reaction of the unreacted CaO of boiler after.
And, residual SO in the atomizing drier herein 2Even have, also can be by the dirty washing type water dissemination apparatus 40 of dust collect plant 20, with most SO 2Be absorbed in the water, from chimney 50, discharge the few Purge gas of oxysulfide.
Embodiment 2
Second embodiment shown in Fig. 2.
Among Fig. 2, the part identical with device shown in Figure 1 is marked with same-sign, comprises following examples, only to describing with Fig. 1 example difference.
The a part 22 usefulness pulverizers 60 of the regenerant of control of dust in the part 43 of reacted draining in the washing type water dissemination apparatus 40 and the dust collect plant 20 are mixed, pulverize, import in the atomizing driers 30 as slurries 61 and spray.So, present from the teeth outwards owing to pulverizing from the unreacted CaO of boiler, thereby promoted reaction.
Embodiment 3
Fig. 3 illustrates the 3rd embodiment.
In the embodiment of Fig. 2,, adopt the method for slurries 61 sprayings of in flue, case of wet attrition being crossed, and in the present embodiment shown in Fig. 3, be the mode of using the unreacted CaO of dry type pulverizing effectively in order to use unreacted CaO effectively.
Just, the part 43 of the draining of washing type water dissemination apparatus 40 is directly sprayed by atomizing drier 30 at the upper reaches of dust collect plant 20, regenerant 22 from dust collect plant 20,,, after pulverizer 70 is pulverized, carry out air-flow and transport as driving gas with exhaust 23.Air-flow transports gas 71 and imports and be configured on the atomizing drier 30 of front in the desulfurizing agent sprayer unit 80 in the flow flue.
The advantage of present embodiment is, liquid and solid scatter in other flue, and therefore, the amount of control of dust thing 71 is unrestricted.
Different therewith, as former example, mix simultaneously under the situation of spraying as slurries the back, owing to conveying characteristic is subjected to the restriction of slurry viscosity, solid content just can not use more than ormal weight.
Embodiment 4
Fig. 4 illustrates the 4th embodiment of the present invention.
In this embodiment, the ash that dust collect plant 20 reclaims is supplied with water dissemination apparatus 40, thereby promote desulfurized effect herein more.
The part 22 of the regenerant that is obtained by dust collect plant 20 is imported into water dissemination apparatus 40.Absorb SO in the water dissemination apparatus 40 xAfter water contain H 2SO 3(H 2SO 4), it is stored in the jar of bottom, wherein a part of 42 water supply dissemination apparatus 40 recycle, and remainder 43 is same with preceding embodiment, imports the atomizing drier 30 that is in dust collect plant 20 upper reaches.Because water and SO herein 2Therefore the material that gas has reacted is sprayed, and only just can reach flue desulfurization efficiently by spray water and from the reaction of the unreacted CaO of boiler after.
And, even in the atomizing drier 30 herein residual SO is arranged 2, also can be by the dirty washing type water dissemination apparatus 40 of dust collect plant 20, with most SO 2Be absorbed in the water, from chimney 50, discharge oxysulfide SO xFew Purge gas.
Infeed the regenerant 22 of the dust collect plant 20 in the water dissemination apparatus 40, increase SO especially in hope 2Under the situation of uptake, resupply after available pulverizer 60 is pulverized, the water pH that flows through water dissemination apparatus 40 is risen (acidity dies down) thus have SO 2The effect that uptake increases.
More than be to specify the present invention in accordance with the embodiments illustrated, but the present invention is not limited to these embodiment, in the shown scope of the invention of claim scope, can also does various changes.
Specify as above,, then can apply flexibly desulfurizing agent effectively, thereby can provide a kind of equipment cost and operating cost all cheap high-efficiency desulfurization device according to the present invention.
Each symbol in the accompanying drawing below is described.
1 fuel, 2 lime stones, 10 boilers, 20 dust collect plants, 23 exhausts, 30 atomizing driers, 40 washing type water dissemination apparatus, 50 chimneys, 60,70 pulverizers, 41,42,43 water, 21,22,71 regenerants (control of dust thing), 61 slurries, 71 air-flows transport gas, 80 desulfurizing agent sprayer units.

Claims (4)

1, simple dry desulfurizating apparatus, its constitutive characteristic is, has the combustion furnace that can in stove, drop into desulfurizing agent, thereby make the atomizing drier of its desulfurization to the exhaust water spray that this combustion furnace comes out, and from the gas that this drier is discharged, remove in the simple dry desulfurizating apparatus of dust collect plant of dust, the water dissemination apparatus of above-mentioned dust collect plant exhaust sulphur oxide is removed in setting, by the above-mentioned atomizing drier in the flue that is configured between above-mentioned combustion furnace and the above-mentioned dust collect plant, the part of the draining that will come out from above-mentioned water dissemination apparatus, atomisation in above-mentioned flue.
2, simple dry desulfurizating apparatus according to claim 1, its constitutive characteristic be, the part of the draining that above-mentioned water dissemination apparatus is come out and mix by the ash content that above-mentioned dust collect plant obtains after again by above-mentioned atomizing drier spraying.
3, simple dry desulfurizating apparatus according to claim 1, its constitutive characteristic be, the ash content that above-mentioned dust collect plant is obtained imports and make the desulfurizing agent sprayer unit of its distribution, is arranged in the flue of above-mentioned atomizing drier front.
4, simple dry desulfurizating apparatus according to claim 1 is characterized in that, the ash content that above-mentioned dust collect plant obtains is supplied with in the above-mentioned water dissemination apparatus.
CN94117098A 1993-10-13 1994-10-12 Simple dry desulfurizating apparatus Expired - Fee Related CN1043128C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP5255746A JPH07110109A (en) 1993-10-13 1993-10-13 Dry type simplified desulfurizer
JP255746/93 1993-10-13

Publications (2)

Publication Number Publication Date
CN1105900A true CN1105900A (en) 1995-08-02
CN1043128C CN1043128C (en) 1999-04-28

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JP (1) JPH07110109A (en)
CN (1) CN1043128C (en)
AT (1) AT405249B (en)
DE (1) DE4436660A1 (en)
PL (1) PL176281B1 (en)

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CN104736224A (en) * 2012-12-26 2015-06-24 三菱日立电力系统株式会社 Exhaust gas processing device and exhaust gas processing method
CN104764032A (en) * 2007-09-13 2015-07-08 巴布考克及威尔考克斯公司 Bottom ash injection for enhancing spray dryer absorber performance
CN106914125A (en) * 2017-05-17 2017-07-04 莱芜市泰钢工程设计研究有限公司 Flue gas passes through grinding slag dust-removal and desulfurizing method of denitration and system equipment

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US6152053A (en) * 1999-07-30 2000-11-28 Abb Alstom Power Inc. Method and assembly for converting waste water accumulated in a fossil fuel-fired power generation system
DE50014551D1 (en) * 2000-09-11 2007-09-20 Thyssenkrupp Xervon Energy Gmb METHOD FOR CLEANING SMOKE GASES BEHIND FIRE EXTRACTION SYSTEMS
JP4920993B2 (en) * 2005-04-26 2012-04-18 三菱重工メカトロシステムズ株式会社 Exhaust gas treatment apparatus and exhaust gas treatment method
JP5384799B2 (en) * 2007-03-30 2014-01-08 三菱重工メカトロシステムズ株式会社 Exhaust gas treatment apparatus and exhaust gas treatment method
JP5835940B2 (en) * 2011-05-12 2015-12-24 三菱重工メカトロシステムズ株式会社 Exhaust gas treatment method and exhaust gas treatment apparatus
JP2015037764A (en) * 2011-12-16 2015-02-26 日立造船株式会社 Fly ash circulation exhaust gas treatment method
US9352274B2 (en) 2014-01-02 2016-05-31 Alstom Technology Ltd Apparatus and method for evaporating waste water and reducing acid gas emissions
US9724638B2 (en) 2014-01-02 2017-08-08 General Electric Technology Gmbh Apparatus and method for evaporating waste water and reducing acid gas emissions
CN108654325A (en) * 2018-06-14 2018-10-16 南京安伦化工科技有限公司 One kind is for exhaust gas processing device and application method in pharmacy procedure

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JPH0638926B2 (en) * 1986-02-07 1994-05-25 関西電力株式会社 Exhaust gas treatment method from coal-fired boiler
DK163109C (en) * 1986-11-17 1992-06-15 Niro Atomizer As PROCEDURE FOR SUBSTRATING WASTE ABSORPTION TO SULFUR A FLOW OF HEAT ROEGAS
JP2740533B2 (en) * 1989-01-27 1998-04-15 バブコツク日立株式会社 Wet exhaust gas desulfurization method
JP2805497B2 (en) * 1989-05-11 1998-09-30 千代田化工建設株式会社 Treatment of wet flue gas desulfurization wastewater
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Publication number Priority date Publication date Assignee Title
CN104764032A (en) * 2007-09-13 2015-07-08 巴布考克及威尔考克斯公司 Bottom ash injection for enhancing spray dryer absorber performance
CN104736224A (en) * 2012-12-26 2015-06-24 三菱日立电力系统株式会社 Exhaust gas processing device and exhaust gas processing method
US9573095B2 (en) 2012-12-26 2017-02-21 Mitsubishi Hitachi Power Systems, Ltd. Flue gas treatment apparatus and flue gas treatment method
CN104736224B (en) * 2012-12-26 2017-03-22 三菱日立电力系统株式会社 Exhaust gas processing device and exhaust gas processing method
CN106914125A (en) * 2017-05-17 2017-07-04 莱芜市泰钢工程设计研究有限公司 Flue gas passes through grinding slag dust-removal and desulfurizing method of denitration and system equipment

Also Published As

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AT405249B (en) 1999-06-25
PL305419A1 (en) 1995-04-18
DE4436660A1 (en) 1995-04-20
PL176281B1 (en) 1999-05-31
ATA190794A (en) 1998-11-15
JPH07110109A (en) 1995-04-25
CN1043128C (en) 1999-04-28

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