CN105833685A - Method and device for removing mercury from flue gas through optical radiation chlorine atoms and hydroxide radicals - Google Patents
Method and device for removing mercury from flue gas through optical radiation chlorine atoms and hydroxide radicals Download PDFInfo
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- CN105833685A CN105833685A CN201610241277.2A CN201610241277A CN105833685A CN 105833685 A CN105833685 A CN 105833685A CN 201610241277 A CN201610241277 A CN 201610241277A CN 105833685 A CN105833685 A CN 105833685A
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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
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
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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
- B01D53/74—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
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- 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
Abstract
The invention provides a method and device for removing mercury from flue gas through optical radiation chlorine atoms and hydroxide radicals. The mercury-containing flue gas from a boiler enters an optical radiation adsorption washing bed and is in contact with the active carbon fibers on an adsorption reaction column; chlorine forms a hypochlorous acid solution in water; the active carbon fibers on the reaction column are rotated and soaked into the solution and then absorb hypochlorous acid on the surface; under the radiation of ultraviolet light, the hypochlorous acid on the surfaces of the active carbon fibers is decomposed into high-activity chlorine atoms and hydroxide radicals; the mercury in flue gas has oxidizing reaction with the hydroxide radicals and is fixed on the surfaces of the active carbon fibers; and the reaction column is rotated and soaked into the solution again, the mercury oxidative products absorbed on the surfaces fall off and then enter the solution, so that the continuous demercuration and washing processes are completed. The mercury-removing oxidative products are precipitated and separated and then are recycled, and the chlorine remaining in the flue gas is absorbed, separated and then recycled. The system has ultrahigh oxidability, the mercury-removing rate reaches 100%, the removing process is free from secondary pollution, and thus the method has wide market application prospects.
Description
Technical field
The present invention relates to combustion product gases pollutant catabolic gene field, be specifically related to a kind of light radiation chlorine atom and hydroxyl removes gas mercury
Method and device.
Background technology
Hydrargyrum is the traces of heavy metals element of a kind of hypertoxicity, has harm greatly to health and ecological environment.China is generation
Big consumption of coal state of boundary first, in energy resource structure, the ratio of coal is up to 75%, and this general layout is at the most considerably long one section
Big change is not the most had in time.Increasingly stringent along with pollution that caused by coal burning thing air environmental protection standard, it is contemplated that in the near future,
It will be inexorable trend that coal-fired flue-gas mercury pollution controls the appearance of standard.Chinese scholars is in research demercuration new theory and new technical field
Do a large amount of fruitful work.At present, in numerous demercuration methods, adsorbent and wet scrubbing are considered as coal-fired
Two of flue gas demercuration field have most the main flow demercuration technology of development potentiality.In wet scrubbing demercuration technology, most study is application
Existing wet method fume desulfurizing system combines washing demercuration.This technology can realize higher Hg2+(g) removal efficiency, but to indissoluble
Hg0G () does not has obvious removal effect, partial oxidation state hydrargyrum to be also possible to be reduced to Elemental Mercury.Many scholars attempt using
Oxidation technology before desulfurizing tower by the Hg in flue gas0G () initial oxidation is Hg2+(g), de-with wet method fume desulfurizing system washing the most again
Except Hg2+(g).SCR (SCR) the catalysis oxidation demercuration that research is more at present can realize part Hg0G () is converted into
Hg2+(g), but demercuration effect is significantly affected by coal-fired component catalyst type combustion system and burner structure, phase
Close catalysis oxidation mechanism still not very clear.Other oxidation technology, such as plasma oxidation photochemical catalytic oxidation and ozone oxidation
Deng being still in the laboratory exploratory stage.Utilize conventional oxidation agent oxygen in absorption tower such as potassium permanganate potassium peroxydisulfate and sodium chlorite
Change and absorb Hg0G () also achieves good result, but there is also the deficiencies such as absorbent costliness or product component complicated difficult process, relevant
Technology needs the most perfect.Absorption method is mainly by the Hg in activated carbon or other adsorbent flue gas2+(g)
And Hg0G (), is first translated into particulate Hg, then utilize existing cleaner to be captured and reach demercuration purpose.At present
Studying more and that technology is the most ripe active carbon adsorption and have higher demercuration efficiency, but application cost is high, enterprise is difficult to hold
It is subject to.In sum, there is presently no a kind of coal-fired flue gas mercury removal technology being suitable for large-scale commercial.Therefore, improving now
While having demercuration technology, the novel coal flue gas demercuration technology of active development economical and efficient has most important theories and realistic meaning.
Summary of the invention
For Shortcomings in prior art, in order to design a kind of coal-fired flue gas mercury removal technology being suitable for large-scale commercial, this
Invention provides a kind of light radiation chlorine atom and the method and device of hydroxyl removing gas mercury.
The present invention realizes above-mentioned technical purpose by techniques below means.
A kind of light radiation chlorine atom and the device of hydroxyl removing gas mercury, it is characterised in that: it is provided with a light radiation absorption washing bed,
Described light radiation absorption washing bed accessory has an airtight reactor, has the product separating tank for containing water in described reactor,
Described separating tank bottom is provided with product recovery port, and described reactor wall is provided with smoke inlet exhanst gas outlet chlorine inlet and mends
Liquid mouth, described chlorine inlet extends in reactor and connects with the aeration tube that can be positioned at below liquid level, in described reactor
It is additionally provided with the uviol lamp being loaded on adsorption reaction post on sidewall, being loaded on reactor top board, outside uviol lamp, is cased with quartz socket tube,
The surface of described adsorption reaction post is provided with activated carbon fiber, adsorption reaction post be connected with power transmission shaft and with sidewall of reactor revolute pair
Connecting, the latter half of described adsorption reaction post can be immersed in below liquid level.
Preferably, also include that ultrasonic cleaning equipment, described ultrasonic cleaning equipment are in below liquid level and are positioned at adsorption reaction post
The ultrasonic transmitter of bottom.
Preferably, described exhanst gas outlet is connected with chlorine knockout tower, and described chlorine knockout tower connects with chimney breast and chlorine inlet.
Preferably, described adsorption reaction element of a cylinder and reactor top plate contact, both ends of the surface and reactor side plane contact.
Preferably, the quantity of described adsorption reaction post is 1-6, and the quantity of uviol lamp is also multiple, and adsorption reaction post is with purple
Outer lamp interval is arranged.
Preferably, longitudinal pitch A between adsorption reaction post and uviol lamp is between 15cm-25cm；Uviol lamp and uviol lamp
Between optimal lateral space D between 10cm-30cm；Smoke inlet spacing C is between 15cm-40cm；Chlorine exposes
The bubble mean diameter that trachea bloats is not more than 100 microns；Adsorption reaction element cylinder enters the depth B of solution and is positioned at 5cm-10cm；
Uviol lamp and quartz socket tube insert below liquid level more than 10cm；Ultrasonic transmitter keeps hanging down with the end face of adsorption reaction post bottom position
Straight distance 2cm-5cm centimetre；The diameter of adsorption reaction post is 30cm-90cm.
A kind of light radiation chlorine atom and the method for hydroxyl removing gas mercury, it is characterised in that:
(1) chlorine is sprayed into by chlorine aeration tube by chlorine inlet and forms hypochlorite solution in water, the activated carbon on adsorption reaction post
Fiber is by having hypochlorous acid from the teeth outwards after rotating immersion hypochlorite solution；Under ultraviolet radiation, the work of adsorption reaction post
Property carbon fiber surface hypochlorous acid decompose and produce high activity chlorine atom and hydroxyl；
(2) mercury fume enters light radiation absorption washing bed from smoke inlet and connects with the activated carbon fiber on adsorption reaction post
Touch, the hydrargyrum in flue gas can activated carbon fiber surface on adsorption reaction post and hydroxyl generation oxidation reaction, and be fixed on work
Property carbon fiber surface；
(3) after adsorption reaction post continues to rotate and be again dipped into solution, the absorption mercury oxidation product on activated carbon fiber surface takes off
Falling behind and enter solution, thus complete continual demercuration and washing process, mercury oxidation product precipitates, and the product bottom entrance divides
Can sink to separating because of self gravitation reason after groove, be recycled.
Preferably, in described step (3), mercury oxidation product comes off is to use supersonic oscillations mode, in described step (1) also
Including the process using chlorine knockout tower to reclaim chlorine, the chlorine of recovery enters aeration tube again by chlorine inlet.
Preferably, in described step (2), adsorption reaction post is in counterclockwise rotating, and the rotary cutting linear speed of adsorption reaction post
Degree direction is in opposite direction with flow of flue gas.
Preferably, the optimum speed r of adsorption reaction post is between 5 revs/min-30 revs/min；Smoke inlet 1 temperature is the highest
In 200 DEG C, solution is 1L/m with the liquid-gas ratio of flue gas3-25L/m3；The dosage of chlorine is 0.3L (chlorine volume)/m3(molten
Liquid amasss)-5.0L (chlorine volume)/m3Between (liquor capacity), the pH of solution is not higher than 5.5；Solution temperature is general not
Higher than 65 DEG C；Ultraviolet light Net long wave radiation intensity is 30 μ W/cm2-200μW/cm2；The effective wavelength of ultraviolet light should be maintained at
180nm-366nm。
Light radiation chlorine atom of the present invention and the method for hydroxyl removing gas mercury, be to use ultraviolet radiation to decompose hypochlorous acid to produce
Raw chlorine atom and hydroxyl, as the oxidant of hydrargyrum, adsorb the hydrargyrum washed in bed in oxidation removal flue gas in light radiation.Concrete, come
Enter light radiation absorption washing bed from boiler mercury fume from smoke inlet and contact with the activated carbon fiber on adsorption reaction post.
Chlorine is sprayed into by chlorine aeration tube by chlorine inlet and forms hypochlorite solution in water.Activated carbon fiber on adsorption reaction post passes through
Rotating can be from the teeth outwards with hypochlorous acid after immersing acid solution.Activated carbon fiber table under ultraviolet radiation, on adsorption reaction post
Face can produce high activity chlorine atom and hydroxyl because hypochlorous acid decomposes.Hydrargyrum in flue gas can activated carbon fiber on adsorption reaction post
Surface and hydroxyl generation oxidation reaction, and it is fixed on activated carbon fiber surface.When adsorption reaction post continues to rotate and again soak
After entering solution, the absorption mercury oxidation product on activated carbon fiber surface can enter solution after coming off because of supersonic oscillations, thus complete
Become continual demercuration and washing process.Demercuration oxidation product is mainly mercury oxide precipitation, after the product separating tank bottom entrance
Can sink to separating because of self gravitation reason, thus be recycled.In flue gas, the chlorine of residual can be inhaled by the chlorine knockout tower of afterbody
Contracture is from also cycling and reutilization.This system has extremely strong oxidisability, it is possible to realize 100% demercuration rate, and subtractive process is without secondary
Pollute.
Light radiation chlorine atom of the present invention and the method and device of hydroxyl removing gas mercury, have that equipment is simple, initial cost is little,
The plurality of advantages such as demercuration efficiency subtractive process non-secondary pollution high, whole, have wide development and application prospect.
Accompanying drawing explanation
Fig. 1 is front view and the structural representation of light radiation absorption washing bed in the present invention.
Fig. 2 is left view and the structural representation of light radiation absorption washing bed in the present invention.
Fig. 3 is the fluorescent tube arrangement schematic diagram of light radiation absorption washing bed in the present invention.
Fig. 4 is the ESR spectrum figure of light radiation chlorine atom and hydroxyl.
In figure:
1-smoke inlet, 2-chlorine inlet, 3-exhanst gas outlet, 4-aeration tube, 5-uviol lamp, 6-product recovery port, 7-fluid infusion mouth,
8-product separating tank, 9-chlorine knockout tower, 10-adsorption reaction post, 11-reactor, 12-ultrasonic cleaning equipment, 13-ultrasound emission
Device, 14-reactor top board, 15-sidewall of reactor, 16-power transmission shaft.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
As it is shown in figure 1, light radiation chlorine atom of the present invention and the method and device of hydroxyl removing gas mercury, it is provided with a light
Radiation absorption washing bed, described light radiation absorption washing bed accessory has an airtight reactor 11, has in described reactor 11
For containing the product separating tank 8 of water, described separating tank bottom is provided with product recovery port 6, and described reactor 11 wall is provided with cigarette
Gas entrance 1 exhanst gas outlet 3 chlorine inlet 2 fluid infusion mouth 7, in described chlorine inlet 2 extends to reactor 11 and with energy
The aeration tube 4 being enough positioned at below liquid level connects, and is additionally provided with and is loaded on adsorption reaction post 10 on sidewall, dress in described reactor 11
Uviol lamp 5 on reactor top board 14, uviol lamp 5 is outside is cased with quartz socket tube, and the surface of described adsorption reaction post 10 sets
Active carbon fiber, adsorption reaction post 10 is connected with power transmission shaft (16) and is connected with sidewall of reactor 15 revolute pair, described
The latter half of adsorption reaction post 10 can be immersed in below liquid level.Described exhanst gas outlet 3 is connected with chlorine knockout tower 9, described
Chlorine knockout tower 9 connects with chimney breast and chlorine inlet 2.Ultrasonic cleaning equipment 12 it is provided with in reactor 11, described ultrasonic
Clean device 12 be in below liquid level and be positioned at the ultrasonic transmitter 13 of adsorption reaction post 10 bottom.
As shown in Figure 2 and Figure 3, the bus of described adsorption reaction post 10 contacts with reactor top board 14, both ends of the surface and reactor
Sidewall 15 contacts, to prevent flue gas from escaping from gap rather than through activated carbon fiber adsorption layer.Enter according to flue gas flow and hydrargyrum
Mouth concentration, adsorption reaction post 10 could be arranged to 1-6, and usual flue gas flow is the biggest, and hydrargyrum entrance concentration is the highest, adsorption reaction
Post 10 quantity is the most, determines the quantity of adsorption reaction post 10 with specific reference to the emission request of on-the-spot test and hydrargyrum, very little cannot
Meet removal efficiency requirement, reactor 11 volume can be strengthened too much, increase system operation cost.
The method of described light radiation chlorine atom and hydroxyl removing gas mercury is to use ultraviolet radiation to decompose hypochlorous acid to produce chlorine atom
With hydroxyl as the oxidant of hydrargyrum, adsorb the hydrargyrum washed in bed in oxidation removal flue gas in light radiation.From boiler mercury fume from
Smoke inlet 1 enters in light radiation absorption washing bed and contacts with the activated carbon fiber on adsorption reaction post 10.Chlorine is entered by chlorine
Mouth 2 sprays into formation hypochlorite solution in water by chlorine aeration tube 4.Activated carbon fiber on adsorption reaction post 10 is soaked by rotation
Can be from the teeth outwards with hypochlorous acid after entering solution.Under ultraviolet radiation, activated carbon fiber surface on adsorption reaction post 10 can be because of
Hypochlorous acid decomposes and produces high activity chlorine atom and hydroxyl.Hydrargyrum in flue gas can activated carbon fiber surface on adsorption reaction post 10
With hydroxyl generation oxidation reaction, and it is fixed on activated carbon fiber surface.When adsorption reaction post 10 continues to rotate and be again dipped into
After solution, the absorption mercury oxidation product on activated carbon fiber surface because supersonic oscillations enter solution after coming off, thus can complete
Continual demercuration and washing process.Demercuration oxidation product is mainly mercury oxide precipitation, after the product separating tank 8 bottom entrance
Can sink to separating because of self gravitation reason, thus be recycled.In flue gas, the chlorine of residual can be by the chlorine knockout tower 9 of afterbody
Absorption and separation cycling and reutilization.
As shown in Figure 4, electron spin resonance kaleidophon is used can be measured in ultraviolet radiation chlorine aqueous solution create chlorine atom
And hydroxyl.Therefore, first ultraviolet radiation decomposes chlorine aqueous solution is to release to have highly active chlorine atom and hydroxyl, specifically
Process can represent with following chemical reaction (1)-(6):
Cl·+H2O→OH-+·OH (5)
·O-++H2O→OH-+·OH (6)
Having the Elemental Mercury in the hydroxyl oxidable removing flue gas of active character, detailed process can be with following chemical reaction (7) table
Show:
Hg0+·OH→HgO↓+H· (7)
The mercury oxide that reaction produces can recycle as the raw material of industry after precipitate and separate, demercuration process non-secondary pollution.
In light radiation absorption washing bed, longitudinal pitch A between adsorption reaction post 10 and uviol lamp 5 then cannot ensure light spoke too greatly
Penetrating uniformity and radiant intensity, the least then energy consumption is too high, and uviol lamp 5 input cost is greatly increased, therefore adsorption reaction post 10 and ultraviolet
Optimal longitudinal pitch A between lamp 5 is between 15cm-25cm.In like manner, between the optimal lateral between uviol lamp 5 and uviol lamp 5
Away from D between 10cm-30cm.Smoke inlet 1 spacing C too conference causes smoke distribution uneven, and the least meeting causes flue gas stream
Dynamic disorder, flow resistance increases, therefore smoke inlet 1 optimal spacing C is between 15cm-40cm.The gas that chlorine aeration tube 4 bloats
Bulb diameter cannot meet the most greatly enough gas liquid interfacial area, thus the bubble mean diameter that bloats of chlorine aeration tube 4 to be not more than 100 micro-
Rice.Adsorption reaction post 10 bus enters the vertical dimension of solution or depth B is the least cannot provide enough NACF moistening face
Long-pending, oversize, rotation and hydrargyrum capturing efficiency can be reduced, therefore adsorption reaction post 10 bus enters the optimal vertical dimension of solution or deep
Degree B should be positioned at 5cm-10cm.Uviol lamp 5 and quartz socket tube should insert below liquid level more than 10cm, to ensure that uviol lamp 5 exists
High-temperature flue gas washes away lower acquisition efficient liquid phase cooling effect, liquid cooling effectiveness flue gas to be significantly larger than cooling effect.Ultrasonic
Emitter keeps vertical dimension 2cm-5cm centimetre with the end face of adsorption reaction post 10 bottom position, because Cavitation effect the most closely can be caused,
Destroy ultrasonic probe, too far then reduce cleaning oscillation effect.Adsorption reaction post 10 in counterclockwise rotating, and must be inhaled
The rolling tangential velocity attitude of reaction enclosure post 10 is in opposite direction with flow of flue gas, so can ensure that with flue gas stream be countercurrent direction,
Thus heat and mass transfer enhancement, improve capturing efficiency.The least meeting of diameter of adsorption reaction post 10 causes activated carbon pricker dimension to lay area too
Little, catch area and efficiency declines, too big reactor 11 volume that then adds of diameter, therefore the optimum diameter of adsorption reaction post 10
It is 30cm-90cm.Adsorption reaction post 10 rotating speed is the lowest, and single rotates seizure and the response time is the longest, and single removal effect improves,
But the lowest meeting of rotating speed causes system entirety removal efficiency to decline, and therefore the optimum speed r of adsorption reaction post 10 is positioned at 5 rev/min-30
Between rev/min, specifically also need to determine optimized rotating speed according to on-the-spot emission request and removal efficiency.
The highest meeting of smoke inlet 1 temperature causes uviol lamp 5 work efficiency to be greatly reduced, and increases the cooling difficulty of solution, reduces chlorine
Dissolubility and utilization rate, and aggravate hypochlorous selfdecomposition, therefore smoke inlet 1 temperature be not above 200 DEG C.Solution and flue gas
The highest meeting of liquid-gas ratio cause the treatment quantity of unit reactor 11 to increase considerably, and then cause removal efficiency to decline, and molten
Liquid is the lowest with the liquid-gas ratio of flue gas, and reactor 11 can be caused to make full use of, and utilization rate reduces, therefore solution and flue gas is optimal
Liquid-gas ratio is 1L/m3-25L/m3.Chlorine addition amount improves can improve hypochlorous concentration in solution, promotes that chlorine atom and hydroxyl produce
Rate improves, thus improves the removal efficiency of hydrargyrum, but the escape amount that the highest meeting of dosage causes chlorine in tail gas is greatly improved, thus
Increase separating difficulty and the cost of afterbody chlorine knockout tower 9, thus the optimum dosage of chlorine is 0.3L (chlorine volume)/m3(molten
Liquid amasss)-5.0L (chlorine volume)/m3Between (liquor capacity).The pH of solution is the highest can accelerate hypochlorous acid selfdecomposition, therefore
It is generally not more than 5.5.The highest meeting of solution temperature causes hypochlorous acid to accelerate selfdecomposition, and reduces the dissolubility of hydrargyrum, thus reduces de-
Except efficiency, therefore solution temperature is generally not more than 65 DEG C.The concentration of mercury in flue gas is more than 500 μ g/m3Time can not reach removing requirement,
Therefore mercury in flue gas concentration should be less than 500 μ g/m3.Ultraviolet radiation intensity is the lowest cannot meet emission requirements, the highest meeting cause be
System energy consumption is greatly improved, therefore ultraviolet light Net long wave radiation intensity is 30 μ W/cm2-200μW/cm2.Ultraviolet wavelength is the shortest, radiation
The photon energy gone out is the highest, and the hypochlorous ability of photodissociation is the strongest, but now the transmission capacity of ultraviolet light is the lowest, i.e. disposal ability has
Limit, contrary ultraviolet wavelength is the longest, and photon decomposes hypochlorous ability and declines, but effectively propagation distance increases, i.e. disposal ability
Rising, therefore the effective wavelength of ultraviolet light should be maintained at 180nm-366nm.
Embodiment 1:
Longitudinal pitch A between adsorption reaction post 10 and uviol lamp 5 is 20cm, the horizontal spacing D between uviol lamp 5 and uviol lamp 5
For 20cm, smoke inlet 1 spacing C is 25cm, and the minute bubbles average diameter that chlorine aeration tube 4 bloats is 50 microns, adsorption reaction
Vertical dimension or the depth B of post 10 bus entrance solution are 7cm, and uviol lamp 5 and quartz socket tube insert below liquid level 15cm, ultrasonic
Emitter keeps vertical dimension to be 3cm with the end face of adsorption reaction post 10 bottom position, and adsorption reaction post 10 rotates in counter clockwise direction,
The diameter of adsorption reaction post 10 is 50cm, and rotating speed r is 15 revs/min.Smoke inlet 1 temperature is 120 DEG C, and liquid-gas ratio is 8L/m3,
The dosage of chlorine is 2.0L (chlorine volume)/m3(liquor capacity), pH value of solution is 4.5, and solution temperature is 45 DEG C, in flue gas
Hydrargyrum concentration is 100 μ g/m3, ultraviolet radiation intensity is 80 μ W/cm2, ultraviolet wavelength is 254nm.In small test system
Result be: demercuration efficiency reaches 88.9%.
Embodiment 2:
Longitudinal pitch A between adsorption reaction post 10 and uviol lamp 5 is 20cm, the horizontal spacing D between uviol lamp 5 and uviol lamp 5
For 20cm, smoke inlet 1 spacing C is 25cm, and the minute bubbles average diameter that chlorine aeration tube 4 bloats is 50 microns, adsorption reaction
Vertical dimension or the depth B of post 10 bus entrance solution are 7cm, and uviol lamp 5 and quartz socket tube insert below liquid level 15cm, ultrasonic
Emitter keeps vertical dimension to be 3cm with the end face of adsorption reaction post 10 bottom position, and adsorption reaction post 10 rotates in counter clockwise direction,
The diameter of adsorption reaction post 10 is 50cm, and rotating speed r is 15 revs/min.Smoke inlet 1 temperature is 120 DEG C, and liquid-gas ratio is 5L/m3,
The dosage of chlorine is 3.0L (chlorine volume)/m3(liquor capacity), pH value of solution is 4.5, and solution temperature is 45 DEG C, in flue gas
Hydrargyrum concentration is 100 μ g/m3, ultraviolet radiation intensity is 160 μ W/cm2, ultraviolet wavelength is 254nm.In small test system
On result be: demercuration efficiency reaches 100%.
Embodiment 3:
Longitudinal pitch A between adsorption reaction post 10 and uviol lamp 5 is 20cm, the horizontal spacing D between uviol lamp 5 and uviol lamp 5
For 20cm, smoke inlet 1 spacing C is 25cm, and the minute bubbles average diameter that chlorine aeration tube 4 bloats is 50 microns, adsorption reaction
Vertical dimension or the depth B of post 10 bus entrance solution are 7cm, and uviol lamp 5 and quartz socket tube insert below liquid level 15cm, ultrasonic
Emitter keeps vertical dimension to be 3cm with the end face of adsorption reaction post 10 bottom position, and adsorption reaction post 10 rotates in counter clockwise direction,
The diameter of adsorption reaction post 10 is 50cm, and rotating speed r is 15 revs/min.Smoke inlet 1 temperature is 120 DEG C, and liquid-gas ratio is 5L/m3,
The dosage of chlorine is 1.0L (chlorine volume)/m3(liquor capacity), pH value of solution is 4.5, and solution temperature is 45 DEG C, in flue gas
Hydrargyrum concentration is 200 μ g/m3, ultraviolet radiation intensity is 120 μ W/cm2, ultraviolet wavelength is 254nm.In small test system
On result be: demercuration efficiency reaches 83.9%.
Embodiment 4:
Longitudinal pitch A between adsorption reaction post 10 and uviol lamp 5 is 20cm, the horizontal spacing D between uviol lamp 5 and uviol lamp 5
For 20cm, smoke inlet 1 spacing C is 25cm, and the minute bubbles average diameter that chlorine aeration tube 4 bloats is 50 microns, adsorption reaction
Vertical dimension or the depth B of post 10 bus entrance solution are 7cm, and uviol lamp 5 and quartz socket tube insert below liquid level 15cm, ultrasonic
Emitter keeps vertical dimension to be 3cm with the end face of adsorption reaction post 10 bottom position, and adsorption reaction post 10 rotates in counter clockwise direction,
The diameter of adsorption reaction post 10 is 50cm, and rotating speed r is 15 revs/min.Smoke inlet 1 temperature is 120 DEG C, and liquid-gas ratio is 5L/m3,
The dosage of chlorine is 3.0L (chlorine volume)/m3(liquor capacity), pH value of solution is 4.5, and solution temperature is 45 DEG C, in flue gas
Hydrargyrum concentration is 100 μ g/m3, ultraviolet radiation intensity is 160 μ W/cm2, ultraviolet wavelength is 365nm.In small test system
On result be: demercuration efficiency reaches 56.1%.
Embodiment 5:
Longitudinal pitch A between adsorption reaction post 10 and uviol lamp 5 is 20cm, the horizontal spacing D between uviol lamp 5 and uviol lamp 5
For 20cm, smoke inlet 1 spacing C is 25cm, and the minute bubbles average diameter that chlorine aeration tube 4 bloats is 50 microns, adsorption reaction
Vertical dimension or the depth B of post 10 bus entrance solution are 7cm, and uviol lamp 5 and quartz socket tube insert below liquid level 15cm, ultrasonic
Emitter keeps vertical dimension to be 3cm with the end face of adsorption reaction post 10 bottom position, and adsorption reaction post 10 rotates in counter clockwise direction,
The diameter of adsorption reaction post 10 is 50cm, and rotating speed r is 15 revs/min.Smoke inlet 1 temperature is 120 DEG C, and liquid-gas ratio is 5L/m3,
The dosage of chlorine is 3.0L (chlorine volume)/m3(liquor capacity), pH value of solution is 4.5, and solution temperature is 45 DEG C, in flue gas
Hydrargyrum concentration is 200 μ g/m3, ultraviolet radiation intensity is 100 μ W/cm2, ultraviolet wavelength is 365nm.In small test system
On result be: demercuration efficiency reaches 46.9%
Comprehensive Correlation through above example understands, and embodiment 2 has optimal removal effect, and the removal efficiency of hydrargyrum reaches
100%, can consult and use as most preferred embodiment.
Described embodiment be the present invention preferred embodiment, but the present invention is not limited to above-mentioned embodiment, without departing substantially from this
In the case of the flesh and blood of invention, any conspicuously improved, replacement or modification that those skilled in the art can make are equal
Belong to protection scope of the present invention.
Claims (10)
1. a light radiation chlorine atom and the device of hydroxyl removing gas mercury, it is characterised in that: it is provided with a light radiation absorption washing
Bed, described light radiation absorption washing bed accessory has an airtight reactor (11), and described reactor has for containing in (11)
The product separating tank (8) of water, described separating tank bottom is provided with product recovery port (6), and described reactor (11) wall is provided with cigarette
Gas entrance (1) exhanst gas outlet (3) chlorine inlet (2) fluid infusion mouth (7), described chlorine inlet (2) extends to instead
In answering device (11) and connecting with the aeration tube (4) that can be positioned at below liquid level, described reactor is additionally provided with dress in (11)
Adsorption reaction post (10), the uviol lamp (5) that is loaded on reactor top board (14) on sidewall, uviol lamp (5) is outside to be cased with
Quartz socket tube, the surface of described adsorption reaction post (10) is provided with activated carbon fiber, adsorption reaction post (10) and power transmission shaft (16)
Connecting and be connected with sidewall of reactor (15) revolute pair, the latter half of described adsorption reaction post (10) can be immersed in liquid
Below face.
Light radiation chlorine atom the most according to claim 1 and the device of hydroxyl removing gas mercury, it is characterised in that: also include
Ultrasonic cleaning equipment (12), described ultrasonic cleaning equipment (12) is in below liquid level and is positioned under adsorption reaction post (10)
The ultrasonic transmitter (13) in portion.
Light radiation chlorine atom the most according to claim 1 and the device of hydroxyl removing gas mercury, it is characterised in that: described cigarette
Gas outlet (3) is connected with chlorine knockout tower (9), and described chlorine knockout tower (9) connects with chimney breast and chlorine inlet (2)
Logical.
Light radiation chlorine atom the most according to claim 1 and the device of hydroxyl removing gas mercury, it is characterised in that: described suction
The bus of reaction enclosure post (10) contacts with reactor top board (14), and both ends of the surface contact with sidewall of reactor (15).
Light radiation chlorine atom the most according to claim 1 and the device of hydroxyl removing gas mercury, it is characterised in that: described suction
The quantity of reaction enclosure post (10) is 1-6, and the quantity of uviol lamp (5) is also multiple, and adsorption reaction post (10) and ultraviolet
Lamp (5) interval is arranged.
Light radiation chlorine atom the most according to claim 1 and the device of hydroxyl removing gas mercury, it is characterised in that: absorption is anti-
Longitudinal pitch A between Ying Zhu (10) and uviol lamp (5) is between 15cm-25cm；Uviol lamp (5) and uviol lamp (5)
Between optimal lateral space D between 10cm-30cm；Smoke inlet (1) spacing C is between 15cm-40cm；
The bubble mean diameter that chlorine aeration tube (4) bloats is not more than 100 microns；Adsorption reaction post (10) bus enters the deep of solution
Degree B is positioned at 5cm-10cm；Uviol lamp (5) and quartz socket tube insert below liquid level more than 10cm；Ultrasonic transmitter (13)
Vertical dimension 2cm-5cm centimetre is kept with the end face of adsorption reaction post (10) bottom position；The diameter of adsorption reaction post (10) is
30cm-90cm。
7. a light radiation chlorine atom and the method for hydroxyl removing gas mercury, it is characterised in that:
(1) chlorine is sprayed into by chlorine inlet (2) formed hypochlorite solution in water by chlorine aeration tube (4), adsorption reaction post
(10) activated carbon fiber on is by having hypochlorous acid from the teeth outwards after rotating immersion hypochlorite solution；Under ultraviolet radiation,
The hypochlorous acid on the activated carbon fiber surface of adsorption reaction post (10) decomposes generation high activity chlorine atom and hydroxyl；
(2) mercury fume from smoke inlet (1) enter light radiation absorption washing bed and with the work on adsorption reaction post (10)
Property carbon fiber contact, the hydrargyrum in flue gas can activated carbon fiber surface on adsorption reaction post (10) and hydroxyl generation oxidation reaction,
And it is fixed on activated carbon fiber surface；
(3) after adsorption reaction post (10) continues to rotate and be again dipped into solution, the absorption mercury oxidation on activated carbon fiber surface
Product enters solution after coming off, thus completes continual demercuration and washing process, and mercury oxidation product precipitates, bottom entrance
Can sink to separating because of self gravitation reason after product separating tank (8), be recycled.
Light radiation chlorine atom the most according to claim 1 and the method for hydroxyl removing gas mercury, it is characterised in that: described step
Suddenly in (3), mercury oxidation product comes off is to use supersonic oscillations mode, also includes using chlorine knockout tower in described step (1)
(9) reclaiming the process of chlorine, the chlorine of recovery enters aeration tube (4) again by chlorine inlet (2).
Light radiation chlorine atom the most according to claim 1 and the method for hydroxyl removing gas mercury, it is characterised in that: described step
Suddenly in (2), adsorption reaction post (10) rotates in counter clockwise direction, and the rolling tangential velocity attitude of adsorption reaction post (10)
In opposite direction with flow of flue gas.
Light radiation chlorine atom the most according to claim 1 and the method for hydroxyl removing gas mercury, it is characterised in that: absorption
The rotating speed r of reaction column (10) is between 5 revs/min-30 revs/min；Smoke inlet (1) temperature is not higher than 200 DEG C, molten
Liquid is 1L/m with the liquid-gas ratio of flue gas3-25L/m3；The dosage of chlorine is 0.3L (chlorine volume)/m3(liquor capacity)-5.0L
(chlorine volume)/m3Between (liquor capacity), the pH of solution is not higher than 5.5；Solution temperature is generally not more than 65 DEG C；Purple
Outer smooth Net long wave radiation intensity is 30 μ W/cm2-200μW/cm2；The effective wavelength of ultraviolet light should be maintained at 180nm-366nm.
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