CN110075683A - SO in a kind of removing boiler smoke3Method and system - Google Patents

SO in a kind of removing boiler smoke3Method and system Download PDF

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Publication number
CN110075683A
CN110075683A CN201910305575.7A CN201910305575A CN110075683A CN 110075683 A CN110075683 A CN 110075683A CN 201910305575 A CN201910305575 A CN 201910305575A CN 110075683 A CN110075683 A CN 110075683A
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China
Prior art keywords
flue
modulation
concentrated solution
alkaline absorbent
absorbent
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Pending
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CN201910305575.7A
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Chinese (zh)
Inventor
罗浩东
李琳
潘敏
陈宇卿
宁爽
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China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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Priority to CN201910305575.7A priority Critical patent/CN110075683A/en
Publication of CN110075683A publication Critical patent/CN110075683A/en
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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
    • B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8603—Removing sulfur compounds
    • B01D53/8609—Sulfur oxides
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants
    • 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
    • B01D53/96—Regeneration, reactivation or recycling of reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses SO in a kind of removing boiler smoke3Method and system, the step of the method includes: that the flue gas that boiler is discharged successively is passed through SCR denitration device, air preheater, desulfurizing tower by (1)；(2) neat stress is extracted, the neat stress is passed through modulation bicarbonate absorbent in alkaline absorbent concentrated solution；(3) the bicarbonate absorbent of modulation is sprayed into the flue between the SCR denitration device and the air preheater by the drop that atomizer is atomized into 30 microns -100 microns, after the drop forms loose porous carbonate particle in flue, with the SO in the flue gas through denitration3Reaction.Using the present invention, it is able to solve SO3The low problem of removal efficiency.

Description

SO in a kind of removing boiler smoke3Method and system
Technical field
The present invention relates to boiler flue gas purification technical fields, and in particular to SO in a kind of removing boiler smoke3Method and System.
Background technique
Coal-burning power plant can generate a certain amount of SO in boiler combustion process and in subsequent denitrification process3.Especially as Universal, the SO in part of smoke of SCR (catalytic oxidation denitration device) technology2SO is generated under the effect of the catalyst3, SO3 Although production quantity less, a series of serious harm: the 1, SO in flue can be caused3The ammonia understood and sprayed in SCR Chemical reaction is generated, generating has corrosive ammonium salt, causes serious corrosion and blocking to air preheater；2, acid dew point With SO in flue gas3Increasing for content and increase, when temperature be lower than acid dew point when, SO3It can be condensed out in flue, to flue Generate corrosion；If 3, SO in smoke evacuation3Too high levels, will cause " Lan Yu " phenomenon, increase the opacity of flue gas, pollution is big Gas.Therefore, how economic, environmental protection, efficiently by SO in power plant3Content reduce, become important topic.
Existing SO3Removing sulfuldioxide includes: one, by solid alkaline absorbent (such as sodium carbonate, trona, magnesium carbonate Deng) be injected directly into flue；Two, absorbent solution is sprayed into flue.The shortcomings that above-mentioned first way, is: 1, solid-state It is larger that substance directly sprays particle, it is difficult to and flue gas is uniformly mixed and SO3Contact surface is limited, causes removal efficiency not high；2, If directly use bicarbonate as absorbent if higher cost, if carbonate or other alkaline matters is used to exist as absorbent Gas can not be decomposed to give off in flue and forms loose porous structure, and reaction speed is slow.The shortcomings that above-mentioned second way, exists In: the crystalline pore structure generated after moisture is evaporated is undeveloped and the contact area of flue gas is smaller, reaction rate is slow, removing Low efficiency.
Summary of the invention
The object of the present invention is to provide SO in a kind of removing boiler smoke3Method and system, be able to solve SO3Removing effect The low problem of rate.
To achieve the above object, SO in a kind of removing boiler smoke provided by the present invention3Method, step includes:
(1) flue gas that boiler is discharged successively is passed through SCR denitration device, air preheater, desulfurizing tower；
(2) neat stress is extracted, the neat stress is passed through modulation bicarbonate absorbent in alkaline absorbent concentrated solution, During passing through the neat stress, the alkaline absorbent concentrated solution is sufficiently stirred；
(3) the bicarbonate absorbent of modulation is sprayed by the drop that atomizer is atomized into 30 microns -100 microns In flue between the SCR denitration device and the air preheater, the drop forms loose porous carbon in flue After hydrochlorate particle, with the SO in the flue gas through denitration3Reaction.
Preferably, in the step (2), the concentration of the alkaline absorbent concentrated solution is monitored, by adjusting solid base Property absorbent confession give to keep the concentration of the alkaline absorbent concentrated solution to be in or close to saturation state.
Preferably, in the step (2), the liquid level of the alkaline absorbent concentrated solution is monitored, is extracted by control net The rate of flue gas is to adjust the liquid level of the alkaline absorbent concentrated solution.
Preferably, in the step (2), the solute of the alkaline absorbent concentrated solution is sodium carbonate, magnesium carbonate, day One of right alkali is a variety of.
Preferably, in the step (3), the temperature range of the flue is 450-300 DEG C.
Preferably, in the step (3), after first the bicarbonate absorbent impurity screening of modulation, steam are separated, Repressurization atomization sprays into flue.
The present invention also provides SO in a kind of removing boiler smoke3System comprising pass through the sequentially connected pot of flue Furnace, SCR denitration device, air preheater, desulfurizing tower and chimney further include that neat stress utilizes equipment；The neat stress is utilized and is set Standby includes the modulation tank for being mounted with alkaline absorbent concentrated solution, and the lower part of the modulation tank is equipped with smoke inlet, the modulation tank Smoke inlet connect through air extractor with the smoke outlet of the desulfurizing tower, it is described modulation tank middle part or top be equipped with The liquid outlet of liquid mouth, the modulation tank leads in the flue between the SCR denitration device and the air preheater；It is described Several atomizers, the modulation are evenly distributed in flue inner wall between SCR denitration device and the air preheater The liquid outlet of tank connects with the atomizer.
Preferably, the bottom of the modulation tank is equipped with agitating device.
Preferably, the modulation tank is equipped with the charging gear for sustainable supply solid-state alkaline absorbent.
Preferably, filter device, steam point are connected in turn between the liquid outlet and the atomizer of the modulation tank From device and atomizing pump.
Preferably, SO in the removing boiler smoke3System further include negative-feedback equipment, the negative-feedback equipment packet Include control centre and be set to it is described modulation tank on concentration monitoring device, level monitoring device, the control centre respectively with The concentration monitoring device, level monitoring device, air extractor, atomizing pump and the connection of charging gear signal.
SO in a kind of removing boiler smoke provided by above-mentioned technical proposal3Method and system, with prior art phase Than advantageous effects include:
1. the vapor in wet-method desulfurized fume is absorbed using concentrated solution, so that water steam utilizes, without additional Increase supply water, it is more environmentally-friendly.
2. absorbent concentrated solution is atomised in 30 microns of -100 microns of penetrating flues using multiple atomizers, then steam Hair crystallization generates solid absorbent, since atomization can make the size of droplet very small, the solid state absorption after crystallization The size of agent is smaller.The absorbent of small size is easier and flue gas is uniformly mixed, and bigger with the contact area of flue gas, It improves and SO3Reaction rate and efficiency, reduce the dosage of alkaline absorbent, also make SCR denitration device pre- with air The length of flue between hot device can shorten.
3. utilizing the CO in tail flue gas2Alkaline absorbent is modulated, it is made to become bicarbonate, in high temperature cigarette In road, bicarbonate crystal can decompose again, release CO2Gas and vapor form loose porous carbonate, increase Specific surface area, improves and SO3Reaction rate and efficiency, reduce the dosage of alkaline absorbent, also make SCR denitration device The length of flue between air preheater can shorten.
Detailed description of the invention
Fig. 1 is SO in removing boiler smoke of the invention3System composition schematic diagram.
Wherein, 1- boiler, 2-SCR denitrification apparatus, 3- air preheater, 4- desulfurizing tower, 5- chimney, 6- air extractor, 7- Level monitoring device, 8- concentration monitoring device, 9- agitating device, 10- charging gear, 11- filter device, the separation of 12- steam Device, 13- atomizing pump, 14- atomizer, 15- modulate tank, 16- control centre.
Specific embodiment
Below with reference to Fig. 1 and embodiment, specific embodiments of the present invention will be described in further detail.Implement below Example is not intended to limit the scope of the invention for illustrating the present invention.
SO in a kind of removing boiler smoke provided by the present invention3Method, step includes:
(1) flue gas that boiler is discharged successively is passed through SCR denitration device, air preheater, desulfurizing tower；
(2) neat stress is extracted, the neat stress is passed through modulation bicarbonate absorbent in alkaline absorbent concentrated solution, During passing through the neat stress, the alkaline absorbent concentrated solution is sufficiently stirred；
(3) the bicarbonate absorbent of modulation is sprayed by the drop that atomizer is atomized into 30 microns -100 microns In flue between the SCR denitration device and the air preheater, the drop forms loose porous carbon in flue After hydrochlorate particle, with the SO in the flue gas through denitration3Reaction.
SO in removing boiler smoke of the invention3Method can be applied to coal-fired station reduce SO3Content.This hair It is bright to utilize excessive CO in desulfurizing tower tail flue gas2Gas is modulated liquid alkaline absorbent concentrated solution, generates bicarbonate Salt stripping liquid.After the stripping liquid modulated is uniformly sprayed into SCR denitration device using nozzle again, air preheat In flue before device, the moisture of stripping liquid is evaporated crystallization using the high temperature of flue and generates bicarbonate, bicarbonate Salt releases CO2Gas generates carbonate, and due to having released gas, the carbonate absorption agent generated at this time presents loose porous Structure, so as to more quickly and SO3It is reacted, solves the problems, such as that solid absorbent and flue gas mixing are non-uniform, Improve removing SO3Efficiency, save the dosage of absorbent, the length of reaction flue needed for shortening realizes coal-fired electricity SO in factory's flue3Efficient removal.
In the step (1), neat stress a part through desulfurization is expelled to atmosphere through chimney, and another part enters step Suddenly (2).By containing vapor, droplet and CO in the neat stress of wet desulphurization2Gas.Alkaline absorbent concentrated solution one Excessive CO in aspect and neat stress2Reaction generates bicarbonate rapidly, on the other hand absorbs the moisture in flue gas.Using dense Solution absorbs the vapor in wet-method desulfurized fume, so that water steam utilizes, is followed to the water of power plant system Ring utilizes, and supplies water without additional increase, more environmentally-friendly.
In the step (2), pot liquid is sufficiently stirred using agitating device, it is ensured that alkaline absorbent is dense Solution and flue gas come into full contact with.
Preferably, in the step (2), the concentration of the alkaline absorbent concentrated solution is monitored, by adjusting solid base Property absorbent confession give to keep the concentration of the alkaline absorbent concentrated solution to be in or close to saturation state.If the alkali Property absorbent concentrated solution concentration it is low, increase delivery rate at this time, improve solution concentration.If otherwise the alkaline absorbent is dense The excessive concentration of solution reduces delivery rate, reduces solution concentration.
Preferably, in the step (2), the liquid level of the alkaline absorbent concentrated solution is monitored, is extracted by control net The rate of flue gas is to adjust the liquid level of the alkaline absorbent concentrated solution.When the liquid level of alkaline absorbent concentrated solution is lower than set When determining minimum liquid level range, then the power for controlling air extractor tunes up, and more carries a large amount of vapor and droplet saturation Flue gas is inhaled into alkaline absorbent concentrated solution, supplements the moisture of alkaline absorbent concentrated solution.When taking away, concentrated solution rate is low In water absorption, liquid level rises.The power of air extractor is turned down if liquid level is excessively high, so that the rate for taking concentrated solution away is lower than Water absorption, liquid level decline.
Preferably, in the step (2), the solute of the alkaline absorbent concentrated solution is sodium carbonate, magnesium carbonate, day One of right alkali is a variety of.
Preferably, in the step (3), the temperature range of the flue is 450-300 DEG C.
Preferably, in the step (3), after first the bicarbonate absorbent impurity screening of modulation, steam are separated, Repressurization atomization sprays into flue.The bicarbonate modulated first passes through filter device and filters out impurity；It is dense molten due at this time It is mixed with a certain amount of flue gas residual in liquid and removes remaining flue gas so setting steam trap carries out steam separation；Then Spraying required pressure is provided；Finally, concentrated solution is sprayed by atomizer atomization for 30 microns -100 microns of droplet Enter in high-temperature flue.Concentrated solution droplet is evaporated rapidly to form bicarbonate little particle in high-temperature flue, and sodium bicarbonate small Grain is rapidly thermally decomposed, and CO is released2And vapor, loose porous bicarbonate particles are formed, with SO in flue gas3Reaction, Sulfate is generated, CO is released2, reach removing SO3Final purpose.
Attached drawing 1 is please referred to, SO in the removing boiler smoke of the above method can be applied the present invention also provides a kind of3Be System comprising by the sequentially connected boiler 1 of flue, SCR denitration device 2, air preheater 3, desulfurizing tower 4 and chimney 5, also Equipment is utilized including neat stress；The neat stress includes the modulation tank 15 for being mounted with alkaline absorbent concentrated solution, institute using equipment The lower part for stating modulation tank 15 is equipped with smoke inlet, and the smoke inlet of the modulation tank 15 is through air extractor 6 and the desulfurizing tower 4 Smoke outlet connect, it is described modulation tank 15 middle part or top be equipped with liquid outlet, it is described modulation tank 15 liquid outlet lead to institute It states in the flue between SCR denitration device 2 and the air preheater 3；The SCR denitration device 2 and the air preheater Several atomizers 14 are evenly distributed in flue inner wall between 3, the liquid outlet of the modulation tank 15 and the atomization are sprayed First 14 connect.
SO in removing boiler smoke based on above-mentioned technical characteristic3System, utilize concentrated solution absorb wet desulphurization after cigarette Vapor in gas recycles the water of power plant system, supplies water without additional increase, more environmentally-friendly；Using more Absorbent concentrated solution is atomised in 30 microns of -100 microns of penetrating flues by a atomizer 14, and re-evaporation crystallization generates solid-state Absorbent, due to atomization the size of droplet can be made very small, crystallization after solid absorbent size more It is small.The absorbent of small size is easier and flue gas is uniformly mixed, and bigger with the contact area of flue gas, is improved and SO3's Reaction rate and efficiency, reduce the dosage of alkaline absorbent, also make between SCR denitration device 2 and the air preheater 3 The length of flue can shorten.Utilize the CO in tail flue gas2Alkaline absorbent is modulated, it is made to become bicarbonate Salt, in high-temperature flue, bicarbonate crystal can decompose again, release CO2Gas and vapor form loose porous carbon Hydrochlorate increases specific surface area, improves and SO3Reaction rate and efficiency, reduce the dosage of alkaline absorbent, also make The length of flue between SCR denitration device 2 and the air preheater 3 can shorten.
Preferably, the bottom of the modulation tank 15 is equipped with agitating device 9.By the agitating device 9 to pot liquid into Row is sufficiently stirred, it is ensured that solution and flue gas come into full contact with.
Preferably, the modulation tank 15 is equipped with the charging gear 10 for sustainable supply solid-state alkaline absorbent.
Preferably, it is described modulation tank 15 liquid outlet and the atomizer 14 between be connected in turn filter device 11, Steam trap 12 and atomizing pump 13.
Using the system of the present embodiment, extracted using aspiration pump 6 from the neat stress that the smoke outlet of desulfurizing tower 4 is discharged to institute Modulation 15 bottom of tank is stated, by containing vapor, droplet and CO in the neat stress of wet desulphurization2Gas, the modulation tank A certain amount of alkaline absorbent concentrated solution, the excessive CO in concentrated solution one side and neat stress are housed in 152Reaction generates rapidly On the other hand bicarbonate absorbs the moisture in flue gas.The top of the modulation tank 15 is equipped with charging gear 10, continually Offer solid-state alkaline absorbent, keep tank in concentrated solution concentration close to saturation state.The bicarbonate modulated is first Impurity is filtered out by the filter device 11；Due to being mixed with a certain amount of flue gas residual in concentrated solution at this time, so setting Steam trap 12 carries out steam separation, removes remaining flue gas；Spraying required pressure is provided using atomizing pump 13；Most Eventually, concentrated solution sprays into SCR denitration device 2 and the sky by the atomization of atomizer 14 for 30 microns -100 microns of droplet In flue between air preheater 3.For guarantee atomization droplet mix with flue gas uniformly, need to flue inner wall it is uniformly right Claim to arrange multiple atomizers 14.Concentrated solution droplet is evaporated to form bicarbonate little particle, carbon rapidly in high-temperature flue Sour hydrogen salt little particle is rapidly thermally decomposed, and CO is released2And vapor, loose porous carbonate particle is formed, in flue gas SO3Reaction generates sulfate, releases CO2, reach removing SO3Final purpose.
Preferably, SO in the removing boiler smoke3System further include negative-feedback equipment, the negative-feedback equipment packet Include control centre 16 and the concentration monitoring device 8 being set on the modulation tank, level monitoring device 7, the control centre 16 Connect respectively with the concentration monitoring device 8, level monitoring device 7, air extractor 6, atomizing pump 13 and 10 signal of charging gear It connects.The control centre 16 passes through the data provided according to level monitoring device 7, concentration monitoring device 8 and controls air extractor 6, charging gear 10, atomizing pump 13 form negative-feedback regu- lation, ensure the relatively stable of solution concentration and water level in tank.Using negative Feedback system automatically controls charging gear 10 and takes out the power of air extractor 6, realizes accurate to the concentration of solution in modulation tank 15 Control, improves the stability of whole system.
Negative-feedback regu- lation process in the modulation tank 15 is as follows:
1, when the liquid level in 7 modulation tank of level monitoring device is lower than set minimum liquid level range, then in control The heart 16 tunes up the power of air extractor 6, more carries a large amount of vapor and droplet saturated flue gas and is inhaled into modulation tank In, supplement the moisture in tank.When taking the rate of concentrated solution away lower than water absorption, liquid level rises；It will pumping if liquid level is excessively high The power of device is turned down, when so that taking the rate of concentrated solution away lower than water absorption, liquid level decline.
If 2, solution concentration is low in tank, control centre 16 tunes up the power of charging gear 10 at this time, increases feed speed Rate improves solution concentration.If solution concentration is excessively high in tank on the contrary, the power of charging gear 10 is turned down, reduce delivery rate, Reduce solution concentration.
3,13 power can be pumped according to on-site actual situations adjustable spraying.
The above is only the preferred embodiment of the present invention, it is noted that those skilled in the art are come It says, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement It should be regarded as protection scope of the present invention.

Claims (11)

1. SO in a kind of removing boiler smoke3Method, step includes:
(1) flue gas that boiler is discharged successively is passed through SCR denitration device, air preheater, desulfurizing tower；
(2) neat stress is extracted, the neat stress is passed through modulation bicarbonate absorbent in alkaline absorbent concentrated solution, is being passed through During the neat stress, the alkaline absorbent concentrated solution is sufficiently stirred；
(3) the bicarbonate absorbent of modulation is atomized by atomizer described in 30 microns -100 microns of drop penetrating In flue between SCR denitration device and the air preheater, the drop forms loose porous carbonate in flue After particle, with the SO in the flue gas through denitration3Reaction.
2. SO in removing boiler smoke as described in claim 13Method, which is characterized in that in the step (2), monitoring The concentration of the alkaline absorbent concentrated solution, the confession by adjusting solid-state alkaline absorbent give to keep the alkaline absorbent dense The concentration of solution is in or close to saturation state.
3. SO in removing boiler smoke as described in claim 13Method, which is characterized in that in the step (2), monitoring The liquid level of the alkaline absorbent concentrated solution extracts the rate of neat stress by control to adjust the alkaline absorbent concentrated solution Liquid level.
4. SO in removing boiler smoke as described in claim 13Method, which is characterized in that it is described in the step (2) The solute of alkaline absorbent concentrated solution is one of sodium carbonate, magnesium carbonate, trona or a variety of.
5. SO in removing boiler smoke as described in claim 13Method, which is characterized in that it is described in the step (3) The temperature range of flue is 450-300 DEG C.
6. SO in removing boiler smoke as described in claim 13Method, which is characterized in that in the step (3), first will After bicarbonate absorbent impurity screening, the steam of modulation separate, repressurization atomization is sprayed into flue.
7. SO in a kind of removing boiler smoke3System, which is characterized in that it includes by the sequentially connected boiler of flue, SCR Denitrification apparatus, air preheater, desulfurizing tower and chimney further include that neat stress utilizes equipment；
The neat stress includes the modulation tank for being mounted with alkaline absorbent concentrated solution using equipment, and the lower part of the modulation tank is equipped with The smoke inlet of smoke inlet, the modulation tank connects through air extractor with the smoke outlet of the desulfurizing tower, the modulation tank Middle part or top are equipped with liquid outlet, and the liquid outlet of the modulation tank leads to the SCR denitration device and the air preheater Between flue in；
Several atomizers are evenly distributed in flue inner wall between the SCR denitration device and the air preheater, The liquid outlet of the modulation tank connects with the atomizer.
8. SO in removing boiler smoke as claimed in claim 73System, which is characterized in that it is described modulation tank bottom be equipped with Agitating device.
9. SO in removing boiler smoke as claimed in claim 73System, which is characterized in that the modulation tank be equipped be used for The charging gear of sustainable supply solid-state alkaline absorbent.
10. SO in removing boiler smoke as claimed in claim 93System, which is characterized in that it is described modulation tank liquid outlet It is connected with filter device, steam trap and atomizing pump in turn between the atomizer.
11. SO in removing boiler smoke as claimed in claim 103System, which is characterized in that further include negative-feedback equipment, The negative-feedback equipment includes control centre and the concentration monitoring device being set on the modulation tank, level monitoring device, institute Control centre is stated to connect with the concentration monitoring device, level monitoring device, air extractor, atomizing pump and charging gear signal respectively It connects.
CN201910305575.7A 2019-04-16 2019-04-16 SO in a kind of removing boiler smoke3Method and system Pending CN110075683A (en)

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CN105477995A (en) * 2016-01-18 2016-04-13 北京清新环境技术股份有限公司 Method for removing sulfur trioxide from coal-fired flue gas
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CN206262350U (en) * 2016-12-09 2017-06-20 清源天蓝（北京）环保科技有限公司 Smoke-gas wet desulfurization equipment based on sodium carbonate
CN206266239U (en) * 2016-12-09 2017-06-20 清源天蓝（北京）环保科技有限公司 Fume desulfurizing agent sodium acid carbonate regenerating unit
CN108671715A (en) * 2018-05-11 2018-10-19 南京师范大学 A kind of coal-fired flue-gas sulfur trioxide removing means and its application method and application
CN208194090U (en) * 2018-03-21 2018-12-07 东方电气集团东方锅炉股份有限公司 The device of sulfur trioxide in flue gas is removed using desulfurization wastewater as carrier

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002035544A (en) * 2000-07-21 2002-02-05 Ishikawajima Harima Heavy Ind Co Ltd System for treating waste smoke from boiler
CN105477995A (en) * 2016-01-18 2016-04-13 北京清新环境技术股份有限公司 Method for removing sulfur trioxide from coal-fired flue gas
CN106630269A (en) * 2016-12-05 2017-05-10 中国华电集团科学技术研究总院有限公司 Method and system for desorbing SO3 in flue gas of boiler by using desulfurization waste water
CN206262350U (en) * 2016-12-09 2017-06-20 清源天蓝（北京）环保科技有限公司 Smoke-gas wet desulfurization equipment based on sodium carbonate
CN206266239U (en) * 2016-12-09 2017-06-20 清源天蓝（北京）环保科技有限公司 Fume desulfurizing agent sodium acid carbonate regenerating unit
CN208194090U (en) * 2018-03-21 2018-12-07 东方电气集团东方锅炉股份有限公司 The device of sulfur trioxide in flue gas is removed using desulfurization wastewater as carrier
CN108671715A (en) * 2018-05-11 2018-10-19 南京师范大学 A kind of coal-fired flue-gas sulfur trioxide removing means and its application method and application

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