CN107297142A - A kind of flue gas purifying method - Google Patents
A kind of flue gas purifying method Download PDFInfo
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- CN107297142A CN107297142A CN201710472407.8A CN201710472407A CN107297142A CN 107297142 A CN107297142 A CN 107297142A CN 201710472407 A CN201710472407 A CN 201710472407A CN 107297142 A CN107297142 A CN 107297142A
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/32—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 by electrical effects other than those provided for in group B01D61/00
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Abstract
The invention discloses a kind of flue gas purifying method, for removing the nitrogen oxides in flue gas, sulfurous pollutants, dust and heavy metal, the flue gas purifying method includes：1）Pretreatment；2）Gas-liquid separation is handled；3）Catalytic treatment；4）Corona treatment；5）Chemical reaction handling；6）Electric field adsorption treatment；It is contemplated that improving deficiency of the prior art in terms for the treatment of effect, treatment effeciency and economy, realize efficiently, safely and conveniently treatment effect, reduce energy consumption and cost, flexibly reply different situations, especially can efficiently eliminate nitrogen oxides, sulfurous pollutants, dust and heavy metal with Integration Equilibrium.
Description
Technical field
The invention belongs to field of environment protection, and in particular to a kind of flue gas purifying method.
Background technology
In recent years, because environmental protection work situation is increasingly serious, the pollutant emission standard that country and place are put into effect is cured
Plus it is strict.The position of coal big country to be even more important for coal-fired fume treatment in China, the SO that fire coal is produced2、NOXIt is
The main matter of acid rain, photochemical fog, brings serious harm, country is in stages to ecological environment and residents ' health
Phase in SO2Strategic, the stricter SO of emission reduction2And NOXEmission control standard, and not only SO2、NOXAnd dust
Concentration of emission limit value Deng traditional pollutant is further reduced, and in future, can also propose that control will to the mercury in flue gas and PM2.5
Ask.
At present, in flue gas desulfurization technique, wet method limestone/gypsum desulfurization（FGD）It is most widely used technology.This method
Have the advantages that reaction speed is fast, equipment is simple, desulfuration efficiency is high.But generally existing seriously corroded, operation and maintenance cost are high
And easily cause secondary pollution problems.Denitration technology it is widely used be selective catalytic reduction (SCR), its denitrification percent can be high
Up to more than 90%, but the denitrating catalyst production technology and raw material of China also rely on foreign countries, and catalyst price is sufficiently expensive, into
This height.
Plasma technique can remove fine particle, SO in flue gas simultaneously2、NOXAnd heavy metal, it is considered to be most send out
The flue gases purification of exhibition prospect, it has also become one of development in science and technology direction that China's emphasis is supported.Plasma desulfuration denitration
Method mainly has electron beam irradiation flue gas desulfurization and denitrification skill（EA-FGD）, impulse electric corona desulphurization denitration technology and streamer-discahrge etc. from
Daughter desulphurization denitration technology etc..The principle of various plasma techniques is essentially identical, is produced using electric discharge or electron beam irradiation
By the grains such as electronics, ion, atom, molecule and free radical it is molecular it is a kind of it is new gather state material, pass through physics and chemistry made
With desulphurization denitration is realized, it is confirmed in the scientific research process of its availability in recent years.
For example, the patent for having authorized or having examined includes the half wet process of distributed control type steam-light discharge process for desulfurizing fume
(ZL02116300.6), vertical streamer-discahrge flue gas desulfurization wet reactor (ZL02208831.8), corona plasma
Flue gas pollutant synchronous purification method (ZL200410029622.3), a kind of plasma fire coal boiler fume purification technology
(ZL200310121117.7), recycling removes sulfur dioxide in flue gas, the ozone oxidation dry of nitrogen oxides simultaneously
(CN101337152) etc..Wherein, it is related to SO in flue gas2, the multiple pollutant removing such as NO and Hg technology path be, by putting
The plasma Simultaneous Oxidation NO and element state Hg that electricity is produced are NO2With oxidation state Hg, then, water solubility is utilized in absorption tower
Absorbing liquid simultaneous removing SO2, NOx and oxidation state Hg.
And for example Chinese patent CN103263845B, it discloses a kind of simultaneous SO_2 and NO removal mercury removal device, it is characterised in that
Provided with simulated flue gas generating unit, plasma oxidation unit, activated carbon adsorption unit and flue gas composition detection unit；Simulate cigarette
Pass through rotation between gas generating unit, plasma oxidation unit, the pipeline of activated carbon adsorption unit and flue gas composition detection unit
Rotary valve door and the connection of Y-type three way type joint；The simulation coal-fired flue-gas generating unit is provided with N2Gas cylinder, CO2Gas cylinder, SO2Gas cylinder, O2
Gas cylinder, NO2Gas cylinder, HCl gas cylinders, NO gas cylinders, mass flow controller, Hg0 osmos tubes and thermostat water bath；The thermostatted water
Drexel bottle is provided with bath, Drexel bottle is built with water, and the Hg0 osmos tubes are located in thermostat water bath and produce gas phase mercury；N2
Gas cylinder, CO2Gas cylinder, SO2Gas cylinder, O2Gas cylinder, NO2Gas cylinder, HCl gas cylinders, NO gas cylinders provide corresponding gas, N respectively2Gas cylinder,
CO2Gas cylinder, SO2Gas cylinder, O2Gas cylinder, NO2Gas cylinder, HCl gas cylinders, NO gas cylinders are connected with mass flow controller respectively；The grade from
Daughter oxidation unit is provided with high voltage power supply and plasma reactor；The plasma reactor is provided with quartzy dual dielectric layer,
The quartzy dual dielectric layer includes layered quartz tube and outer layer quartz ampoule, and layered quartz tube is enclosed on stainless steel bar to be situated between as interior
Matter；Outer layer quartz ampoule upper and lower ends are equipped with thread segment, are connected with polytetrafluoroethylene (PTFE) fixture as outer medium, outer layer quartz ampoule
Lower end is provided with air inlet, and outer layer quartz ampoule upper end is provided with gas outlet；The high voltage power supply is electrically connected with plasma reactor；Institute
Activated carbon adsorption unit is stated provided with constant temperature oven and adsorptive reactor；Two parts, top half above and below the adsorptive reactor point
The latter half is inserted, the main body lower end of adsorptive reactor is inlaid with core piece, and adsorptive reactor is placed in constant temperature oven, the perseverance
Two circular holes are provided with the top of warm baking oven, the pipeline turnover for being connected with simulation coal-fired flue-gas；By plasma oxidation unit oxygen
Flue gas after change is split as three pipelines by two Y-type three way types, makes air-flow from three by controlling changeover valve to rotate
Pass through in pipeline；Three pipeline is connected with flue gas analyzer respectively, by alkali liquor absorption bottle and drying bottle after with Hg0 detector phases
Even, it is connected with adsorptive reactor；The detection unit be provided with flue gas analysis unit and Hg0 analytic units, flue gas analysis unit with
Hg0 analytic units are connected by two Y-type three way types with plasma oxidation unit and activated carbon adsorption unit；Hg0 analytic units
In Jerome mercury vapourmeters provided with the absorption bottle containing NaOH solution, drying bottle and for METHOD FOR CONTINUOUS DETERMINATION mercury concentration, the absorption bottle
NaOH effect be to absorb sour gas and Hg2+。
It is more or less the problem of all having following however, in current fume treatment technology：1st, generally existing corrosion is tight
Weight, operation and maintenance cost are high and easily cause secondary pollution problems；2nd, single desulfurization, single denitration or heavy metal, three can not
Eliminate, attend to one thing and lose sight of another well；3rd, single treatment efficiency high, Combined Treatment efficiency are low；4th, plasma processing efficiency is not high, easily
Influenceed by other factorses.
Therefore, how a kind of flue gas processing method is provided, high treating effect, efficiency high and relatively low energy consumption is made it have
And cost, with more preferable economy, as those skilled in the art's important technological problems urgently to be resolved hurrily.
The content of the invention
The present invention is directed to propose a kind of new flue gas purifying method, is imitated with improving prior art in treatment effect, processing
Deficiency in terms of rate and economy, realize efficiently, safely and conveniently treatment effect, reduce energy consumption and cost, flexibly reply
Different situations, especially can efficiently eliminate nitrogen oxides, sulfurous pollutants, dust and heavy metal with Integration Equilibrium（Mercury
Deng）.
To solve above technical problem, a kind of technical scheme that the present invention takes is as follows：
A kind of flue gas purifying method, for removing the nitrogen oxides in flue gas, sulfurous pollutants, dust and heavy metal, the cigarette
Gas purifying method includes：
1）Pretreatment, the dust granule, nitrogen oxides, sulfurous pollutants of the part in flue gas are absorbed remove with cleaning solution；
2）Gas-liquid separation is handled, for will be through the step 1）The drop contained in flue gas after treated is removed；
3）Catalytic treatment, will be through the step 2）Flue gas after processing is passed through catalytic reaction chamber, the inside of the catalytic reaction chamber
Catalyst in the mobile support for being fixed with catalyst carrier with multiple array distributions, the catalyst carrier is used to be catalyzed
Reduction reaction occurs for nitrogen oxides, sulfurous pollutants in flue gas；
4）Corona treatment, will be through the step 3）Plasma of the treated flue gas edge parallel to plasma producing apparatus
Body occur electrode direction of an electric field pass through the plasma-generating electrode so that in flue gas produce include electronics, cation, in
Property particle, free radical entirety be in electroneutral plasma；And make it that the dust granule surface in flue gas is powered；Plasma
Body is acted on the oxygen molecule in flue gas, hydrone, generation H, O, OH, O with strong oxidizing property3SO in active particle, flue gas2、
NOX, Hg chemically reacted in the presence of active particle, generate high price NO3 —And SO4 2—, and oxidation state Hg；
Wherein, plasma-generating electrode includes one group of high-voltage electrode and one group of grounding electrode, and the high-voltage electrode is with connecing
Ground electrode is coated with dielectric, and the high-voltage electrode is in linear array with grounding electrode；
5）Chemical reaction handling, in the step 4）Ammonia, ammonia and the high price NO in flue gas are passed through in flue gas after processing3 —
And SO4 2—The powered ammonium salt particle of reaction generation；
6）Electric field adsorption treatment, will be through the step 5）Treated flue gas makes it by applying the device of direct current biasing electric field
In charged dust particle, powered ammonium salt particle is adsorbed removes；
Flue gas after purification is discharged by chimney.
In denitration desulfurization and dedusting technology of the prior art, plasma-treating technology is directly added into whole processing work mostly
In skill, and things turn out contrary to one's wishes for reality, and whole processing technology does not reach preferable effect, and the present invention is at plasma
Science and engineering skill leading portion removes the droplet and drop in flue gas, steam, and fabulous avoids plasma processing efficiency from being affected.
In certain embodiments of the present invention, in the step 1）In, the cleaning solution is aqueous slkali or the aqueous solution；
Necessarily contain in initial flue gas in substantial amounts of dust granule, present embodiment and pre-treatment step is set, it is water-soluble with alkalescence
Liquid directly first washes out substantial amounts of particulate matter with the aqueous solution, and partial nitrogen oxides, sulfurous pollutants, can be with extremely low
Cost is that follow-up operation eases off the pressure, while can also indirectly lift the purifying rate of subsequent step.
In certain embodiments of the present invention, in the step 4）In, the high-voltage electrode connects high voltage power supply, institute
High voltage power supply is stated for positive polarity DC high-voltage power supply, positive pulse high voltage power supply or the DC stacked ac high voltage source of positive polarity
In one kind or its combination, the grounding electrode use tubular type or board-like, the high-voltage electrode be board-like, astroid, prickle
Line or jaggies, when being continuously applied voltage between the high-voltage electrode and the grounding electrode, you can produce plasma；
The direction of an electric field of plasma is arranged to consistent with the direction of flue gas stream, flue gas stream and plasma beam is increased
The time of contact of stream, contact area, improve the efficiency of desulphurization denitration removing heavy-metal.And based on the processing of above three steps,
When need carry out this step 4）When, nitrogen oxides, the concentration of sulfurous pollutants in flue gas have had come to an ideal value, can
Avoid the active particle in plasma from only being reacted with nitrogen oxides, sulfurous pollutants, be unlikely to when flue gas flows out plasma
When at processing position, heavy metal（Such as mercury）Do not reacted with active particle so that it cannot remove also.
In certain embodiments of the present invention, in the step 4）In, in the gas of the plasma producing apparatus
It is additionally provided with passage in catalyst packed bed, the catalyst packed bed and is installed with catalyst carrier.
In certain embodiments of the present invention, the step 4 is being carried out）When, the plasma producing apparatus is also wrapped
Pressure sensor and temperature sensor are included, passes through the pressure sensor, temperature during the entire process of the corona treatment
Degree sensor monitors the pressure and temperature in the plasma producing apparatus in real time, and pressure, temperature data are transmitted to behaviour
Make room.
In certain embodiments of the present invention, in the step 6）In, the device for applying direct current biasing electric field
Direct current biasing electric field is alternately distributed arrangement for multigroup positive and negative electrode plate and formed, and the setting direction of the positive and negative electrode plate is vertical
In the setting direction of plasma-generating electrode so that the direction of direct current biasing electric field is vertical with flue gas circulating direction.
In certain embodiments of the present invention, the flue gas purifying method is realized by following flue gas purification system, described
Flue gas purification system includes：
Be sequentially connected the pre-scrubber of UNICOM, gas-liquid separator, catalytic reaction chamber, plasma producing apparatus, chemical reaction chamber,
Apply the device of direct current biasing electric field；
The catalytic reaction chamber includes the mobile support for being fixed with catalyst carrier of multiple array distributions, and the mobile support is slided
The dynamic lower surface for being arranged on the catalytic reaction chamber；
The plasma producing apparatus includes plasma-generating electrode, high voltage power supply, pressure sensor and temperature sensor,
The plasma-generating electrode includes one group of high-voltage electrode and one group of grounding electrode, the high-voltage electrode and the ground connection
Electrode is coated with dielectric, and the high-voltage electrode is in linear array, the high-voltage electrode connection with grounding electrode
The high voltage power supply, the high voltage power supply is positive polarity DC high-voltage power supply, positive pulse high voltage power supply or positive polarity direct current
The one kind being superimposed in ac high voltage source or its combination, the grounding electrode use tubular type or board-like, and the high-voltage electrode is
Board-like, astroid, prickle wire or jaggies；The pressure sensor and temperature sensor, for monitoring the plasma in real time
Pressure and temperature in body generating means；Catalyst packed bed is additionally provided with the gas passage of the plasma producing apparatus,
Catalyst carrier is installed with the catalyst packed bed；
The chemical reaction chamber includes ammonia admission line, for being passed through ammonia to inside it；
The device for applying direct current biasing electric field includes direct current biasing electric field, and the direct current biasing electric field is multigroup positive and negative electricity
Pole plate is alternately distributed arrangement and formed, and the positive and negative electrode plate is set perpendicular to plasma-generating electrode surface so that direct current
The direction of bias field is vertical with flue gas circulating direction；Be conducive to the absorption of charged particle.
In certain embodiments of the present invention, the flue gas purification system also includes reservoir, and the reservoir includes
Variable frequency pump, input channel and output channel, the input channel connect the bottom liquid outlet of the gas-liquid separator；It is described defeated
Go out pre-scrubber described in pipeline communication, by the control of the variable frequency pump by the liquid in the reservoir by the output channel
It is delivered to the pre-scrubber.
In certain embodiments of the present invention, it is respectively provided with the positive and negative electrode plate by vibrating device, the vibration dress
Put for particulate matter to be shaken off from the positive and negative electrode plate.
In certain embodiments of the present invention, the flue gas purification system also includes and the application direct current biasing electric field
Device exhanst gas outlet connection absorption tower, the absorption tower water remains for absorbing in flue gas as circulating absorption solution
Sour gas and oxidation state Hg, and ammonia.
Due to the use of above technical scheme, the present invention has the following advantages that compared with prior art：
1st, the present invention solves the elimination of nitrogen oxides and heavy metal in traditional fume treatment technology in the presence of asking for attending to one thing and lose sight of another
Topic, first removes a part by the nitrogen oxides in flue gas with pretreatment and catalytic treatment in the present invention, reduces it in flue gas
Content, corona treatment is then passed through again, nitrogen oxides and element state Hg synchronous elimination can be achieved.
2nd, the preferential pretreatment of the present invention, it is maximized to eliminate particulate matter, and eliminate least a portion of nitrogen oxides and
Sulfurous pollutants, while again handling flue gas by gas-liquid separation step, to remove droplet and/or drop, it is to avoid steam etc. because
Element have impact on the treatment effeciency of corona treatment.
3rd, the present invention is provided with catalytic treatment in the mobile support for being installed with catalyst carrier, corona treatment
The catalyst packed bed for being fixedly provided with catalyst carrier is installed, on the one hand, the use of catalyst can be reduced, only need to add pole
Small part catalyst, has saved cost, on the other hand, and catalyst packed bed is set to the gas of plasma producing apparatus
Space occupation of land can be greatly saved in passage.
4th, the present invention has added temperature sensor and pressure sensor at the position of plasma producing apparatus, greatly
Temperature rise inside when avoiding plasma generator work, safety problem caused by pressure change, it is ensured that the person
Safety and property safety.
5th, flow of flue gas direction is arranged to the electricity with the plasma-generating electrode of plasma producing apparatus by the present invention
Field direction is parallel, overcome flue gas flow rate it is excessive or too small when the reduction of corona treatment effect that causes, increase flue gas
Time of contact, contact area with plasma, to realize the efficient utilization of plasma.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the flue gas purifying method of the present invention；
Fig. 2 is the schematic diagram of one of embodiment of the flue gas purifying method of the present invention；
Fig. 3 is the schematic diagram of the plasma producing apparatus of the present invention.
Embodiment
Technical scheme and its advantage are described in detail with reference to specific preferred embodiments and drawings.
Embodiment is as follows：
Sampling analysis is carried out to the flue gas of certain factory, the fundamental property of its flue gas is：NOx：420~600mg/m3；SO2：1500~
2100mg/m3；Mercury：90~180μg/m3；Dust：18000~30000 mg/m3。
As Figure 1-3, the flue gas is handled according to following steps：
1）Pretreatment：It is by the cleaning solution in pre-scrubber 1 that the dust granule, nitrogen oxides, sulfur-bearing of the part in flue gas is dirty
Contaminate thing and absorb removing；Wherein, the absorbing liquid is aqueous slkali, from the NaOH aqueous solution；
Necessarily contain substantial amounts of dust granule in initial flue gas, substantial amounts of dust particles are first washed out with alkaline aqueous solution, with
And partial nitrogen oxides, sulfurous pollutants, can be that follow-up operation ease off the pressure with extremely low cost, while can also be indirect
Lift the purifying rate of subsequent step；
2）Gas-liquid separation is handled：Will be through the step 1 by gas-liquid separator 2）The drop contained in flue gas after treated is gone
Remove；
The droplet and drop in flue gas, steam are removed in plasma-treating technology leading portion, fabulous avoids at plasma
Reason efficiency is affected；
3）Catalytic treatment：Will be through the step 2）Flue gas after processing is passed through catalytic reaction chamber, the inside of the catalytic reaction chamber 3
Catalyst in the mobile support 31 for being fixed with catalyst carrier with multiple array distributions, the catalyst carrier is used to urge
Change the nitrogen oxides in flue gas, sulfurous pollutants and occur reduction reaction；Purpose is to remove part nitrogen oxides and sulfurous pollutants
To reduce the concentration of nitrogen oxides in effluent and sulfurous pollutants in flue gas；
4）Corona treatment：Will be through the step 3）Treated flue gas along the grade parallel to plasma producing apparatus 4 from
Daughter occur electrode direction of an electric field pass through the plasma-generating electrode so that in flue gas produce include electronics, cation,
Neutral particle, the entirety of free radical are in the plasma of electroneutral；And make it that the dust granule surface in flue gas is powered；Deng from
Daughter is acted on the oxygen molecule in flue gas, hydrone, generation H, O, OH, O with strong oxidizing property3In active particle, flue gas
SO2、NOX, Hg chemically reacted in the presence of active particle, generate high price NO3 —And SO4 2—, and oxidation state Hg；Its
In, plasma-generating electrode includes one group of high-voltage electrode 42 and one group of grounding electrode 43, and the high-voltage electrode 42 is with connecing
Ground electrode 43 is coated with dielectric 41, and the high-voltage electrode 42 is in linear array with grounding electrode 43；The high electricity
Piezoelectricity pole 42 connects high voltage power supply 46, and the high voltage power supply 46 is positive polarity DC high-voltage power supply, and the grounding electrode 43 is used
Tube-sheet type, the high-voltage electrode 42 is board-like, is continuously applied when between the high-voltage electrode 42 and the grounding electrode 43
During voltage, you can produce plasma；The plasma producing apparatus 4 also includes pressure sensor 44 and temperature sensor
45, institute is monitored by the pressure sensor 44, temperature sensor 45 in real time during the entire process of the corona treatment
The pressure and temperature in plasma producing apparatus 4 is stated, and pressure, temperature data are transmitted to operating room；In the plasma
It is additionally provided with the gas passage of body generating means 4 in catalyst packed bed, the catalyst packed bed and is installed with catalyst carrier；
Oxidation state mercury is trapped by the grounding electrode 43；
5）Chemical reaction handling：In the step 4）Ammonia, ammonia and the high price NO in flue gas are passed through in flue gas after processing3 —
And SO4 2—The powered ammonium salt particle of reaction generation；
6）Electric field adsorption treatment：Will be through the step 5）Treated flue gas makes it by applying the device 6 of direct current biasing electric field
In charged dust particle, powered ammonium salt particle is adsorbed removes；The direct current biasing of the device 6 for applying direct current biasing electric field
Electric field is that multigroup positive and negative electrode plate 61,62 is alternately distributed arrangement and formed, the positive and negative electrode plate 61, and 62 setting direction is hung down
Directly in the setting direction of plasma-generating electrode so that the direction of direct current biasing electric field is vertical with flue gas circulating direction；
Flue gas after purification is discharged by chimney.
Above-mentioned processing method of sampling is removed to the nitrogen oxides in flue gas, sulfurous pollutants, dust and heavy metal, most
The indices effect of flue gas significantly, meets real industrial requirement afterwards.
Specific smoke property：NOx：50~90mg/m3；SO2：40~80mg/m3；Mercury：2~5μg/m3；Dust：10~25 mg/
m3。
From above-mentioned result can be seen that according to the present invention processing method can realize to the nitrogen oxides in flue gas,
Sulfurous pollutants, dust and heavy metal removing rate are very high, fully meet emission request of the country to pollutant, while its processing behaviour
Make simple, cost low, can be received by enterprise, and the present invention realizes nitrogen oxides, sulfurous pollutants, dust and heavy metal
Balanced removing, have no it is of the prior art attend to one thing and lose sight of another, and the present invention also has function of safety protection, reduction that can be maximum
The generation of work safety accident, therefore there is very big meaning to filed of flue gas purification.
The present embodiment also provides a kind of flue gas purification system, and the flue gas purifying method is real by the flue gas purification system
Existing, the flue gas purification system includes：
Pre-scrubber 1, gas-liquid separator 2, catalytic reaction chamber 3, plasma producing apparatus 4, the chemistry for being sequentially connected UNICOM are anti-
Answer room 5, apply the device 6 of direct current biasing electric field；
The catalytic reaction chamber 3 includes the mobile support 31 for being fixed with catalyst carrier of multiple array distributions, the mobile branch
The lower surface for being arranged on the catalytic reaction chamber 3 that frame 31 is slided；
The plasma producing apparatus 4 includes plasma-generating electrode, high voltage power supply, pressure sensor 44 and TEMP
Device 45, the plasma-generating electrode includes one group of high-voltage electrode 42 and one group of grounding electrode 43, the high-voltage electrode
42 are coated with dielectric 41 with the grounding electrode 43, and the high-voltage electrode 42 is in linear row with grounding electrode 43
Row, the high-voltage electrode 42 connects the high voltage power supply 46, and the high voltage power supply 46 is positive polarity DC high-voltage power supply, positive pole
Property pulsed high voltage generator or one kind in the DC stacked ac high voltage source of positive polarity or its combination, the grounding electrode 43 uses
Tubular type is board-like, and the high-voltage electrode 42 is board-like, astroid, prickle wire or jaggies, the plasma producing apparatus 4
Gas passage in be additionally provided with catalyst packed bed, the catalyst packed bed and be installed with catalyst carrier；The pressure is passed
Sensor 44 and temperature sensor 45, for monitoring the pressure and temperature in the plasma producing apparatus 4 in real time；
The chemical reaction chamber 5 includes ammonia admission line, for being passed through ammonia to inside it；
The device 6 for applying direct current biasing electric field includes direct current biasing electric field, and the direct current biasing electric field is multigroup positive and negative electricity
Pole plate 61,62 is alternately distributed arrangement and formed, the positive and negative electrode plate 61, and 62 set perpendicular to plasma-generating electrode surface
Put so that the direction of direct current biasing electric field is vertical with flue gas circulating direction；Be conducive to the absorption of charged particle.
Further, the flue gas purification system also include reservoir, the reservoir include variable frequency pump, input channel and
Output channel, the input channel connects the bottom liquid outlet of the gas-liquid separator 2；The output channel connection is described pre-
Washer 1, the prewashing is delivered to by the control of the variable frequency pump by the liquid in the reservoir by the output channel
Wash device 1.
Further, it is respectively provided with the positive and negative electrode plate 61,62 by vibrating device, the vibrating device is used for general
Grain thing is shaken off from the positive and negative electrode plate.
Further, the flue gas purification system also includes going out with the flue gas of the device 6 of the application direct current biasing electric field
Mouthful connection absorption tower 7, the absorption tower 7 with water as circulating absorption solution, the sour gas remained for absorbing in flue gas with
Oxidation state Hg, and ammonia.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention, all according to the present invention
The equivalent change or modification that Spirit Essence is made, should all be included within the scope of the present invention.
Claims (10)
1. a kind of flue gas purifying method, for removing the nitrogen oxides in flue gas, sulfurous pollutants, dust and heavy metal, it is special
Levy and be, the flue gas purifying method includes：
1）Pretreatment
The dust granule, nitrogen oxides, sulfurous pollutants of the part in flue gas are absorbed with cleaning solution and removed；
2）Gas-liquid separation is handled
For will be through the step 1）The drop contained in flue gas after treated is removed；
3）Catalytic treatment
Will be through the step 2）Flue gas after processing is passed through catalytic reaction chamber, and the inside of the catalytic reaction chamber has multiple arrays
Catalyst in the mobile support for being fixed with catalyst carrier of distribution, the catalyst carrier is used for the nitrogen oxygen being catalyzed in flue gas
Reduction reaction occurs for compound, sulfurous pollutants；
4）Corona treatment
Will be through the step 3）Electricity of the treated flue gas along the plasma-generating electrode parallel to plasma producing apparatus
Field direction passes through the plasma-generating electrode so that being produced in flue gas includes electronics, cation, neutral particle, free radical
Entirety be in electroneutral plasma；And make it that the dust granule surface in flue gas is powered；In plasma and flue gas
Oxygen molecule, hydrone effect, generation H, O, OH, O with strong oxidizing property3SO in active particle, flue gas2、NOX, Hg is in activity
Chemically reacted in the presence of particle, generate the NO of high price3 —And SO4 2—, and oxidation state Hg；
Wherein, plasma-generating electrode includes one group of high-voltage electrode and one group of grounding electrode, and the high-voltage electrode is with connecing
Ground electrode is coated with dielectric, and the high-voltage electrode is in linear array with grounding electrode；
5）Chemical reaction handling
In the step 4）Ammonia, ammonia and the high price NO in flue gas are passed through in flue gas after processing3 —And SO4 2—Reaction generation band
Electric ammonium salt particle；
6）Electric field adsorption treatment
Will be through the step 5）Treated flue gas makes charged dust therein by applying the device of direct current biasing electric field
Grain, powered ammonium salt particle are adsorbed to be removed；
Flue gas after purification is discharged by chimney.
2. flue gas purifying method according to claim 1, it is characterised in that in the step 1）In, the cleaning solution is
Aqueous slkali or the aqueous solution.
3. flue gas purifying method according to claim 1, it is characterised in that in the step 4）In, the high voltage electricity
Pole connects high voltage power supply, and the high voltage power supply is that positive polarity DC high-voltage power supply, positive pulse high voltage power supply or positive polarity are straight
One kind or its combination in stream superposition ac high voltage source, the grounding electrode use tubular type or board-like, the high-voltage electrode
For board-like, astroid, prickle wire or jaggies, when being continuously applied voltage between the high-voltage electrode and the grounding electrode
When, you can produce plasma.
4. flue gas purifying method according to claim 1, it is characterised in that in the step 4）In, in the plasma
It is additionally provided with the gas passage of body generating means in catalyst packed bed, the catalyst packed bed and is installed with catalyst carrier.
5. flue gas purifying method according to claim 1, it is characterised in that carrying out the step 4）When, the grade from
Daughter generating means also includes pressure sensor and temperature sensor, passes through institute during the entire process of the corona treatment
State pressure sensor, temperature sensor and monitor pressure and temperature in the plasma producing apparatus in real time, and by pressure, temperature
Degrees of data is transmitted to operating room.
6. flue gas purifying method according to claim 1, it is characterised in that in the step 6）In, the application direct current
The direct current biasing electric field of the device of bias field is alternately distributed arrangement for multigroup positive and negative electrode plate and formed, the positive and negative electrode
Setting direction of the setting direction of plate perpendicular to plasma-generating electrode so that circulated with flue gas in the direction of direct current biasing electric field
Direction is vertical.
7. the flue gas purifying method according to any one of claim 1-6 claim, it is characterised in that the gas cleaning
Method is realized that the flue gas purification system includes by following flue gas purification system：
Be sequentially connected the pre-scrubber of UNICOM, gas-liquid separator, catalytic reaction chamber, plasma producing apparatus, chemical reaction chamber,
Apply the device of direct current biasing electric field；
The catalytic reaction chamber includes the mobile support for being fixed with catalyst carrier of multiple array distributions, and the mobile support is slided
The dynamic lower surface for being arranged on the catalytic reaction chamber；
The plasma producing apparatus includes plasma-generating electrode, high voltage power supply, pressure sensor and temperature sensor,
The plasma-generating electrode includes one group of high-voltage electrode and one group of grounding electrode, the high-voltage electrode and the ground connection
Electrode is coated with dielectric, and the high-voltage electrode is in linear array, the high-voltage electrode connection with grounding electrode
The high voltage power supply, the high voltage power supply is positive polarity DC high-voltage power supply, positive pulse high voltage power supply or positive polarity direct current
The one kind being superimposed in ac high voltage source or its combination, the grounding electrode use tubular type or board-like, and the high-voltage electrode is
Board-like, astroid, prickle wire or jaggies；The pressure sensor and temperature sensor, for monitoring the plasma in real time
Pressure and temperature in body generating means；Catalyst packed bed is additionally provided with the gas passage of the plasma producing apparatus,
Catalyst carrier is installed with the catalyst packed bed；
The chemical reaction chamber includes ammonia admission line, for being passed through ammonia to inside it；
The device for applying direct current biasing electric field includes direct current biasing electric field, and the direct current biasing electric field is multigroup positive and negative electricity
Pole plate is alternately distributed arrangement and formed, and the positive and negative electrode plate is set perpendicular to plasma-generating electrode surface so that direct current
The direction of bias field is vertical with flue gas circulating direction.
8. flue gas purifying method according to claim 7, it is characterised in that the flue gas purification system also includes liquid storage
Groove, the reservoir includes variable frequency pump, input channel and output channel, and the input channel connects the bottom of the gas-liquid separator
Portion's liquid outlet；The output channel connects the pre-scrubber, by the control of the variable frequency pump by the reservoir
Liquid is delivered to the pre-scrubber by the output channel.
9. flue gas purifying method according to claim 7, it is characterised in that be respectively provided with the positive and negative electrode plate by shaking
Dynamic device, the vibrating device is used to shake off particulate matter from the positive and negative electrode plate.
10. flue gas purifying method according to claim 7, it is characterised in that the flue gas purification system also includes and institute
State apply direct current biasing electric field device exhanst gas outlet connection absorption tower, the absorption tower water as circulating absorption solution,
The sour gas remained for absorbing in flue gas and oxidation state Hg, and ammonia.
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| CN109012084A (en) * | 2018-08-18 | 2018-12-18 | 赵德华 | A kind of nitrogen oxide waste gas treatment apparatus |
| CN110184095A (en) * | 2019-05-28 | 2019-08-30 | 中国航天空气动力技术研究院 | A kind of solid waste pyrolytic gasification purified synthesis gas processing method and processing device |
| CN115159743A (en) * | 2022-07-15 | 2022-10-11 | 张彧 | Control method of cleaning equipment and related device |
| CN115899732A (en) * | 2022-10-26 | 2023-04-04 | 河南省锅炉压力容器安全检测研究院 | Structure for retarding corrosion of pipeline on heating surface of waste incineration boiler |
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| CN109012084A (en) * | 2018-08-18 | 2018-12-18 | 赵德华 | A kind of nitrogen oxide waste gas treatment apparatus |
| CN110184095A (en) * | 2019-05-28 | 2019-08-30 | 中国航天空气动力技术研究院 | A kind of solid waste pyrolytic gasification purified synthesis gas processing method and processing device |
| CN115159743A (en) * | 2022-07-15 | 2022-10-11 | 张彧 | Control method of cleaning equipment and related device |
| CN115899732A (en) * | 2022-10-26 | 2023-04-04 | 河南省锅炉压力容器安全检测研究院 | Structure for retarding corrosion of pipeline on heating surface of waste incineration boiler |
| CN115899732B (en) * | 2022-10-26 | 2023-07-28 | 河南省锅炉压力容器安全检测研究院 | Structure for slowing down pipeline corrosion of heating surface of garbage incineration boiler |
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