CN102580517A - Fume desulfurization system and method by adopting dried alkali electrostatic spraying and fume humidifying cooling method - Google Patents
Fume desulfurization system and method by adopting dried alkali electrostatic spraying and fume humidifying cooling method Download PDFInfo
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- CN102580517A CN102580517A CN2011100097554A CN201110009755A CN102580517A CN 102580517 A CN102580517 A CN 102580517A CN 2011100097554 A CN2011100097554 A CN 2011100097554A CN 201110009755 A CN201110009755 A CN 201110009755A CN 102580517 A CN102580517 A CN 102580517A
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Abstract
The invention discloses a fume desulfurization system by adopting a dried alkali electrostatic spraying and fume humidifying cooling method. The fume desulfurization system comprises a fume system, an absorbing tower, an absorbent electrostatic spraying device, a fume water-spraying cooling device and an absorbent storing and delivering device, wherein the fume system comprises a main flue, a dust catcher, a draught fan and a funnel; a Venturi tube is mounted in the absorbing tower; a humidifying spray gun is arranged at the outlet of the Venturi tube; the absorbent storing and delivering device comprises an alkali cabin, a variable frequency spiral conveyer, an alkali cabin electrical clapper and a dilute-phase conveyor; the absorbent electrostatic spraying device is connected with the dilute-phase conveyor by a dilute-phase delivery duct; the fume water-spraying cooling device comprises a process water tank and a process water pump; and the process water pump is used for sending process water in the process water tank to the humidifying spray gun at the outlet of the Venturi tube to spray the process water. In addition, the invention further discloses a fume desulfurization method by adopting the mode of dried alkali electrostatic spraying and fume humidifying cooling. The system provided by the invention has the characteristics of less equipment, simple process, low manufacturing cost and high desulfurization efficiency.
Description
Technical field
The present invention relates to a kind of dry flue gas desulphurization system, relate in particular to a kind of dried alkali (as adopting NaOH or Ca (OH)
2At the ground caustic end as absorbent) electrostatic spraying and flue gas moistening and lowering temperature method flue gas desulphurization system; In addition, the invention still further relates to a kind of dried alkali electrostatic spraying and flue gas moistening and lowering temperature flue gas desulfurization technique method.
Background technology
At present, several kinds of dry flue gas desulphurization technologies commonly used are described below:
A, direct injection dry flue gas desulphurization technology:
This technology is in flue, directly to spray into Ca (OH)
2, Na
2CO
3Or NaHCO
3Powder is as a kind of simple dry flue gas desulphurization technology of absorbent, and this technology is not provided with the absorption tower, and whole sweetening process is all carried out in flue.
Being limited as of this technology: the content that at first is steam in the requirement flue gas very high (such as: the flue gas of garbage furnace treatment system); To provide chemical reaction needed " absorbent deliquescence environment "; If the content of steam is low excessively in the flue gas; Then whole chemical reaction will carry out with the pattern of " gas-solid reaction ", and the efficient of this reaction pattern is low-down.Secondly exactly long flue system to be arranged again, carry out the needed time to guarantee chemical reaction.
This technology is only just used in very special environment, if environmental change then the desulfuration efficiency of this technology will be very low.
B, electrostatic spraying dry flue gas desulphurization technology:
This technology is a kind of improvement technology to " direct injection dry flue gas desulphurization technology ".In flue, spray into Ca (OH)
2, Na
2CO
3Or NaHCO
3Before the powder; At first let the absorbent air-flow through a high-voltage charging equipment, make superabsorbent particles charged, the superabsorbent particles after charged in flue because that the effect that the same sex is repelled each other can distribute is more even; Simultaneously, superabsorbent particles charged after can also the part its activity of raising.Same this technology is not provided with the absorption tower, and whole sweetening process is all carried out in flue.
Being limited as of this technology: owing to there is not the absorption tower, therefore whole chemical reaction all carries out on the filter bag surface of flue and downstream sack cleaner, so the reaction time is difficult to guarantee.Secondly, superabsorbent particles adopts charged mode to reduce reaction activity, and it is very limited improving the active degree of particle, crosses when low when the content of steam in the flue gas, and the desulfuration efficiency of this technology will be had a greatly reduced quality.
C, CFB circulation fluidized bed dry method flue gas desulfur technology:
This technology is a very perfect dry flue gas desulphurization system, and system is with CaO or Ca (OH)
2Be absorbent (relatively cheap, but consumption is big) that system is provided with an absorption tower, in the absorption tower, is provided with the fresh water (FW) spray gun to provide chemical reaction needed " water environment ", and chemical reaction can be carried out with the pattern of ionic reaction.
This technology also is provided with material circulating system, and the flying dust that the downstream deduster is collected partly circulates and gets into the absorption tower, in tower, forms a stable fluid bed, to improve the contact probability of flue gas and absorbent.
But this technology also has some limitation:
At first; So because its system of its system perfecting is provided with complicacy, floor space is big and cost is very high, the difference in height between deduster and absorption tower is required very harsh; Therefore this technology is only applicable to the flue gas desulphurization system of medium-sized boiler unit, and this technology was all inapplicable when a lot of little units were transformed.
Secondly, because the adding of circulating ash makes the load of downstream sack cleaner significantly increase, directly influence the service life of filter bag.
Summary of the invention
The technical problem that the present invention will solve is to overcome the defective that existing dry flue gas desulphurization system exists; A kind of dried alkali electrostatic spraying and flue gas moistening and lowering temperature method flue gas desulphurization system are provided; Whole system equipment is less; Therefore technology is simple, and overall cost is compared other sulfur removal technologies very big advantage is arranged in small-sized generator set desulfurization transformation, and the desulfuration efficiency of this system is high in addition.For this reason, the present invention also provides a kind of dried alkali electrostatic spraying and flue gas moistening and lowering temperature flue gas desulfurization technique method.
For solving above technical problem, the present invention provides a kind of dried alkali electrostatic spraying and flue gas moistening and lowering temperature method flue gas desulphurization system, comprising: flue gas system, absorption tower, absorbent Elecstrostatic spraying apparatus, flue gas spray cooling device and absorbent are stored and transport;
Said flue gas system comprises flue collector, deduster, air-introduced machine and chimney; This flue collector links to each other with the absorption tower inlet; This deduster is positioned at exhaust pass downstream, absorption tower; This air-introduced machine is positioned at the deduster downstream; This chimney links to each other with air-introduced machine;
Be provided with a Venturi tube in the said absorption tower; Venturi tube outlet on the absorption tower is provided with the humidification spray gun;
Said absorbent is stored and transport comprises alkali storehouse, frequency conversion conveying worm, the electronic flapper in alkali storehouse and dilute phase conveyer; This frequency conversion conveying worm links to each other with the outlet in alkali storehouse; The electronic flapper in alkali storehouse links to each other with the dilute phase conveyer with the frequency conversion conveying worm;
Said absorbent Elecstrostatic spraying apparatus links to each other with the dilute phase conveyer through the dilute phase conveyance conduit;
Said flue gas spray cooling device comprises technology water tank and technology water pump; The humidification spray gun that the technology water pump is used for the fresh water (FW) of technology water tank is delivered to absorption tower Venturi tube outlet is to spray into fresh water (FW).
The outlet on said absorption tower is provided with temperature sensor; The inlet on said absorption tower is provided with SO
2Sensor and flue gas flow meter.
Said conveying worm is a VFC, and its conveying capacity is controlled by positive feedback control and negative-feedback; Said positive feedback control is specially: the inlet on the absorption tower is provided with SO
2Sensor and flue gas flow meter by the amount of the required alkali of these two parameters and predetermined alkali/S molar ratio computing calculation system, and carry out coarse adjustment with this model to the rotating speed of frequency conversion conveying worm; Negative-feedback control is specially: on the horizontal flue collector of air-introduced machine outlet, be provided with SO equally
2Sensor can accurately be regulated the rotating speed of frequency conversion conveying worm according to this parameter, reaches the environment protection emission requirement with the content that guarantees pollutant in the flue gas.
The electronic flapper in said alkali storehouse is used to guarantee that the dilute phase conveyer can work normally, and guarantees to carry with scurrying to the alkali bunker in the not meeting of compressed air.
Said dilute phase conveyer is that an employing compressed air is the jet transport of power.
Said Venturi tube is a disperser that adopts upstream injection, and it is used for the ground caustic end that in flue, adds is distributed in flue gas uniformly, improves the contact probability of alkali and sour gas to greatest extent.
The two phase flow humidification spray gun that said humidification spray gun is the L type adopts compressed air that fresh water (FW) is atomized.
Said absorption tower is made up of ascent stage and descending branch, and this ascent stage is Venturi tube, diffuser, direct tube section from bottom to top and is connected the dried shrimp pipeline section, and descending branch is to connect dried shrimp pipeline section, direct tube section from top to bottom, absorption tower outlet and absorption tower ash bucket; The diffuser that venturi on the absorption tower exports is provided with the humidification spray gun.
The descending branch on absorption tower below be provided with an absorption tower ash bucket the separated portions cinder will be discharged into the dust removing system of power plant by the electronic flapper in absorption tower of absorption tower ash bucket below because flue gas turns to.
In addition; The present invention also provides a kind of dried alkali electrostatic spraying and flue gas moistening and lowering temperature flue gas desulfurization technique method; Comprise the steps: from the flue gas of boiler before getting into the absorption tower behind the flue; Evenly added absorbent powder, this absorbent powder need be carried out charged processing and adopted the upstream injection mode that absorbent is joined in the flue gas before adding; Flue gas gets into the absorption tower by bottom, absorption tower inlet then; Quickening the diffuser that the back gets into the absorption tower through the absorption tower Venturi tube; In this diffuser, spray into fresh water (FW) through the humidification spray gun and carry out the humidification absorption, the harmful acid contaminant in the flue gas is absorbed agent and absorbs; Flue gas is discharged the deduster that gets into downstream by the outlet above the ash bucket of absorption tower after through the descending branch on absorption tower, and flue gas is expelled to chimney by system's air-introduced machine after by dedusting in deduster.
Compared with prior art, beneficial effect of the present invention is: the present invention is comprehensive existing above-mentioned several kinds of dry desulfurizing process, gets its advantage, removes its circumscribed a kind of novel dry desulfurizing process.Dry type alkali flue gas desulfurization system adopts the dry flue gas desulphurization technology of alkali as absorbent, because absorbent is relatively more expensive, so generally be applicable to the flue gas desulfurization of small-sized unit.Therefore whole system equipment is less, and technology is simple, and overall cost is compared other sulfur removal technologies very big advantage is arranged in small-sized generator set desulfurization transformation.
Consider that at first the boiler machine pool-size is little, the exhaust gas volumn of need handling is less relatively, and the consumption of absorbent is also less, so system adopts the ground caustic end as absorbent, and this material is easy to deliquescence, therefore requires not harsh to water vapour content in the flue gas.
Secondly, before absorbent adds flue, a charged process is arranged equally, therefore kept the advantage of electrostatic spraying.The function of electrostatic spraying is: a) dried alkali band same sex electric charge, so rapidly evenly separately; B) dried alkali charged with flue gas in SO
2Can combine rapidly Deng acidic materials.Also increasing at the ejiction opening of absorbent has a Venturi tube, adopts contrary spray mode that absorbent is joined in the flue gas, and this will more help the even dispersion of absorbent; Venturi tube can prevent the flue gas particle sedimentation, makes that flue gas moves under low speed in the absorption tower, increases the reaction time of ion.
In addition; Downstream at the adding point of absorbent; Be provided with a humidification reaction tower (i.e. Venturi tube outlet on the absorption tower is provided with the humidification spray gun), obtain better surface-active, quicken the deliquescence at ground caustic end through humidification to absorbent; The acidic materials and the absorbent alkali of flue gas are all existed with ionic species; Thereby guarantee that further chemical reaction is under the pattern of " ionic reaction ", to carry out, therefore can avoid the dependence of system, thereby significantly improve the efficient and the reliability of system the water vapour content of former flue gas own.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further detailed explanation:
Fig. 1 is the structural representation of dried alkali electrostatic spraying of the present invention and flue gas moistening and lowering temperature method flue gas desulphurization system;
Fig. 2 is the structural representation on absorption tower in the system of the present invention.
Wherein: 1-alkali storehouse; 2-frequency conversion conveying worm; The electronic flapper in 3-alkali storehouse; 4-dilute phase conveyer; 5-absorbent Elecstrostatic spraying apparatus; The 6-flue collector; The 7-absorption tower; The 8-deduster; 9-bypass flue; The 10-air-introduced machine; The 11-chimney; The electronic flapper in 12-absorption tower; 13-technology water tank; 14-technology water pump; 15-humidification spray gun; 16-dilute phase conveyance conduit; The 17-dust removing system; The 18-Venturi tube; The 19-diffuser; The 20-direct tube section; 21-connects the dried shrimp pipeline section; The 22-direct tube section; 23-absorption tower ash bucket.
The specific embodiment
As depicted in figs. 1 and 2, system of the present invention mainly consists of the following components:
1, flue gas system:
Flue gas system comprises flue collector 6, bypass flue 9, deduster 8, air-introduced machine 10, chimney 11; This flue collector 6 links to each other with absorption tower 7 inlets; This deduster 8 is positioned at 7 exhaust pass downstream, absorption tower; This air-introduced machine 10 is positioned at deduster 8 downstream; This chimney 11 links to each other with air-introduced machine 10.Bypass flue 9 connection absorption towers 7 and chimney 11; The effect of bypass flue 9 is: when deduster 8 has been gone bad; When needing repairing, flue gas can through bypass flue 9 from the absorption tower 7 directly through air-introduced machine 10 to chimney 11 discharging, do not influence the operation of whole flue gas desulphurization system.
Getting into before the absorption tower 7 behind the flue collector 6 from flue gas (smoke treatment) that the boiler air preheater comes out; Evenly added absorbent; Get into absorption tower 7 by 7 bottoms, absorption tower then; Venturi tube 18 through absorption tower 7 is quickened the humidification absorber portion that the back gets into absorption tower 7, and in this section, the harmful acid contaminant in the flue gas is absorbed agent and absorbs; Flue gas is discharged the deduster 8 that gets into downstream by the outlet above the absorption tower ash bucket 23 after through the descending branch on absorption tower 7, and flue gas is expelled to chimney 11 by system's air-introduced machine 10 after by dedusting in deduster 8.
2, absorption tower system:
As shown in Figure 2, absorption tower 7 is designed to be made up of two parts: ascent stage and descending branch.
In the ascent stage, be made up of these several parts from bottom to top: Venturi tube 18, diffuser 19, direct tube section 20 connect dried shrimp pipeline section 21.
In descending branch, form by these several parts from top to bottom: connect dried shrimp pipeline section 21, direct tube section 22, absorption tower outlet, absorption tower ash bucket 23.
The diffuser 19 of 7 Venturi tube 18 outlets is provided with two phase flow humidification spray gun 15 on the absorption tower, to improve the activity of absorbent.Obtain better surface-active through humidification to absorbent; Quicken the deliquescence at ground caustic end; Thereby guarantee that further chemical reaction is under the pattern of " ionic reaction ", to carry out; Therefore the dependence of system be can avoid, thereby the efficient and the reliability of system significantly improved the water vapour content of former flue gas own.
Venturi tube 18 is dispersers of a particular design, adopts upstream injection.It can let the ground caustic end that in flue, adds be distributed in uniformly in the flue gas, improves the contact probability of alkali and sour gas to greatest extent.
7 outlet also is provided with temperature sensor on the absorption tower, in order to the injection flow rate of control humidification, can guarantee to make the absorption chemical reaction in the best temperature scope, to carry out, and can well guarantee the security of operation of the deduster 8 in downstream again.
The descending branch on absorption tower 7 below be provided with an absorption tower ash bucket 23 the separated portions cinder will be discharged into the dust removing system 17 of power plant by the electronic flapper 12 in the absorption tower of absorption tower ash bucket 23 belows because flue gas turns to.
3, absorbent is stored and induction system:
Said absorbent is stored and transport comprises alkali storehouse 1, frequency conversion conveying worm 2, the electronic flapper 3 in alkali storehouse and dilute phase conveyer 4; This frequency conversion conveying worm 2 links to each other with the outlet in alkali storehouse 1; The electronic flapper 3 in alkali storehouse links to each other with dilute phase conveyer 4 with frequency conversion conveying worm 2, and another interface of dilute phase conveyer 4 links to each other with absorption tower 7 inlets.
Store absorbent in the alkali storehouse 1, the absorbent of this technology uses is to have very the solid base powder of high-specific surface area (like NaOH or Ca (OH)
2Deng), its granularity should guarantee about 13 μ m.
Frequency conversion conveying worm 2 is a VFC, and its conveying capacity receives the control of two factors:
A, positive feedback control: 7 inlet is provided with SO on the absorption tower
2Sensor, and flue gas flow meter just can calculate the amount of the required alkali of system by these two parameters and predetermined alkali/S mol ratio, and with this model the rotating speed of frequency conversion conveying worm 2 is carried out coarse adjustment;
B, negative-feedback control: on the horizontal flue collector 6 of air-introduced machine 10 outlets, be provided with SO equally
2Sensor can accurately be regulated the rotating speed of frequency conversion conveying worm 2 according to this parameter, reaches the environment protection emission requirement with the content that guarantees pollutant in the flue gas.
The setting of the electronic flapper 3 in alkali storehouse is can work normally for dilute phase conveyer 4, and guarantees to carry with scurrying to alkali storehouse 1 in the not meeting of compressed air.
Dilute phase conveyer 4 is that an employing compressed air is the jet transport of power, and this device has been widely used in the dilute phase induction system of granular material at present.
4, absorbent Elecstrostatic spraying apparatus
This absorbent Elecstrostatic spraying apparatus 5 links to each other with dilute phase conveyer 4 through dilute phase conveyance conduit 16.This absorbent Elecstrostatic spraying apparatus 5 is used for absorbent powder was carried out charged processing and adopted the upstream injection mode that absorbent is joined flue gas before adding flue gas.Before absorbent adds flue, a charged process is arranged, therefore kept the advantage of electrostatic spraying.The function of this absorbent Elecstrostatic spraying apparatus 5 is: a) dried alkali band same sex electric charge, so rapidly evenly separately; B) dried alkali charged with flue gas in SO
2Can combine rapidly Deng acidic materials.Ejiction opening at absorbent also is provided with a Venturi tube 18, adopts contrary spray mode that absorbent is joined in the flue gas, and this will more help the even dispersion of absorbent.Venturi tube 18 can prevent the flue gas particle sedimentation, makes that flue gas moves under low speed in the absorption tower, increases the reaction time of ion.
5, flue gas spray cooling device:
Said flue gas spray cooling device comprises technology water tank 13 and technology water pump 14; The humidification spray gun 15 that technology water pump 14 is used for the fresh water (FW) of technology water tank 13 is delivered to absorption tower Venturi tube 18 outlet diffusers 19 is to spray into fresh water (FW).
The addition of fresh water (FW) is by the temperature sensor control of absorption tower 7 outlet, and it is related that injection flow rate and the temperature signal of absorption tower 7 outlets carry out, and is controlled at 75～80 ℃ with assurance absorption tower 7 outlet temperatures.
As shown in Figure 1; A kind of dried alkali electrostatic spraying of the present invention and flue gas moistening and lowering temperature flue gas desulfurization technique method; Comprise the steps: from the flue gas of boiler before getting into absorption tower 7 behind the flue collector 6; Evenly added absorbent powder, this absorbent powder need be carried out charged processing and adopted the upstream injection mode that absorbent is joined in the flue gas before adding; Flue gas gets into absorption tower 7 by 7 bottoms, absorption tower inlet then; Quickening the diffuser 19 that the back gets into absorption tower 7 through absorption tower Venturi tube 18; In this diffuser 19; Spray into fresh water (FW) through humidification spray gun 15 and carry out the humidification absorption; Harmful acid contaminant in the flue gas is absorbed agent and absorbs, and flue gas is discharged the deduster 8 that gets into downstream by the outlet above the absorption tower ash bucket 23 after through the descending branch on absorption tower 7, and flue gas is expelled to chimney 11 by system's air-introduced machine 10 after by dedusting in deduster 8.
Claims (10)
1. dried alkali electrostatic spraying and flue gas moistening and lowering temperature method flue gas desulphurization system is characterized in that, comprising: flue gas system, absorption tower, absorbent Elecstrostatic spraying apparatus, flue gas spray cooling device and absorbent are stored and transport;
Said flue gas system comprises flue collector, deduster, air-introduced machine and chimney; This flue collector links to each other with the absorption tower inlet; This deduster is positioned at exhaust pass downstream, absorption tower; This air-introduced machine is positioned at the deduster downstream; This chimney links to each other with air-introduced machine;
Be provided with a Venturi tube in the said absorption tower; Venturi tube outlet on the absorption tower is provided with the humidification spray gun;
Said absorbent is stored and transport comprises alkali storehouse, frequency conversion conveying worm, the electronic flapper in alkali storehouse and dilute phase conveyer; This frequency conversion conveying worm links to each other with the outlet in alkali storehouse; The electronic flapper in alkali storehouse links to each other with the dilute phase conveyer with the frequency conversion conveying worm;
Said absorbent Elecstrostatic spraying apparatus links to each other with the dilute phase conveyer through the dilute phase conveyance conduit;
Said flue gas spray cooling device comprises technology water tank and technology water pump; The humidification spray gun that the technology water pump is used for the fresh water (FW) of technology water tank is delivered to absorption tower Venturi tube outlet is to spray into fresh water (FW).
2. dried alkali electrostatic spraying according to claim 1 and flue gas moistening and lowering temperature method flue gas desulphurization system is characterized in that the outlet on said absorption tower is provided with temperature sensor; The inlet on said absorption tower is provided with SO
2Sensor and flue gas flow meter.
3. dried alkali electrostatic spraying according to claim 1 and flue gas moistening and lowering temperature method flue gas desulphurization system is characterized in that said conveying worm is a VFC, and its conveying capacity is controlled by positive feedback control and negative-feedback; Said positive feedback control is specially: the inlet on the absorption tower is provided with SO
2Sensor and flue gas flow meter by the amount of the required alkali of these two parameters and predetermined alkali/S molar ratio computing calculation system, and carry out coarse adjustment with this model to the rotating speed of frequency conversion conveying worm; Negative-feedback control is specially: on the horizontal flue collector of air-introduced machine outlet, be provided with SO equally
2Sensor can accurately be regulated the rotating speed of frequency conversion conveying worm according to this parameter, reaches the environment protection emission requirement with the content that guarantees pollutant in the flue gas.
4. dried alkali electrostatic spraying according to claim 1 and flue gas moistening and lowering temperature method flue gas desulphurization system; It is characterized in that; The electronic flapper in said alkali storehouse is used to guarantee that the dilute phase conveyer can work normally, and guarantees to carry with scurrying to the alkali bunker in the not meeting of compressed air.
5. dried alkali electrostatic spraying according to claim 1 and flue gas moistening and lowering temperature method flue gas desulphurization system is characterized in that, said dilute phase conveyer is that an employing compressed air is the jet transport of power.
6. dried alkali electrostatic spraying according to claim 1 and flue gas moistening and lowering temperature method flue gas desulphurization system; It is characterized in that; Said Venturi tube is a disperser that adopts upstream injection; It is used for the ground caustic end that in flue, adds is distributed in flue gas uniformly, improves the contact probability of alkali and sour gas to greatest extent.
7. dried alkali electrostatic spraying according to claim 1 and flue gas moistening and lowering temperature method flue gas desulphurization system is characterized in that, the two phase flow humidification spray gun that said humidification spray gun is the L type adopts compressed air that fresh water (FW) is atomized.
8. dried alkali electrostatic spraying according to claim 1 and flue gas moistening and lowering temperature method flue gas desulphurization system; It is characterized in that; Said absorption tower is made up of ascent stage and descending branch; This ascent stage is Venturi tube, diffuser, direct tube section from bottom to top and is connected the dried shrimp pipeline section, and descending branch is to connect dried shrimp pipeline section, direct tube section from top to bottom, absorption tower outlet and absorption tower ash bucket; The diffuser that venturi on the absorption tower exports is provided with the humidification spray gun.
9. dried alkali electrostatic spraying according to claim 8 and flue gas moistening and lowering temperature method flue gas desulphurization system; It is characterized in that; The descending branch on absorption tower below be provided with an absorption tower ash bucket the separated portions cinder will be discharged into the dust removing system of power plant by the electronic flapper in absorption tower of absorption tower ash bucket below because flue gas turns to.
10. dried alkali electrostatic spraying and flue gas moistening and lowering temperature flue gas desulfurization technique method; It is characterized in that; Comprise the steps: from the flue gas of boiler before getting into the absorption tower behind the flue; Evenly added absorbent powder, this absorbent powder need be carried out charged processing and adopted the upstream injection mode that absorbent is joined in the flue gas before adding; Flue gas gets into the absorption tower by bottom, absorption tower inlet then; Quickening the diffuser that the back gets into the absorption tower through the absorption tower Venturi tube; In this diffuser, spray into fresh water (FW) through the humidification spray gun and carry out the humidification absorption, the harmful acid contaminant in the flue gas is absorbed agent and absorbs; Flue gas is discharged the deduster that gets into downstream by the outlet above the ash bucket of absorption tower after through the descending branch on absorption tower, and flue gas is expelled to chimney by system's air-introduced machine after by dedusting in deduster.
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