CN104474859A - Flue gas desulfurization and denitrification method and device and application of flue gas desulfurization and denitrification device - Google Patents
Flue gas desulfurization and denitrification method and device and application of flue gas desulfurization and denitrification device Download PDFInfo
- Publication number
- CN104474859A CN104474859A CN201410743597.9A CN201410743597A CN104474859A CN 104474859 A CN104474859 A CN 104474859A CN 201410743597 A CN201410743597 A CN 201410743597A CN 104474859 A CN104474859 A CN 104474859A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- gas desulfurization
- denitrification
- irradiation
- electron beam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses an electron beam flue gas desulfurization and denitrification method comprising the following steps of (1) carrying out spray treatment on flue gas generated by a boiler or a gas turbine by using water to cool the flue gas; and (2) mixing the cooled flue gas and ammonia gas, and then, carrying out ultraviolet irradiation and electron beam irradiation to realize desulfurization and denitrification. The method disclosed by the invention can be used for simultaneously carrying out desulfurization and denitrification reaction, so that the process flow is simplified, and the equipment and operation investments are reduced. An ultraviolet generator is relatively cheap and available, so that the power requirement of an electron beam generation device can be further reduced by additionally arranging the ultraviolet generator in an irradiation reactor, and furthermore, the investment and operation costs of the electron beam generation device can be remarkably reduced. The invention also discloses a device applying the method and application of the device.
Description
Technical field
The present invention relates to filed of flue gas purification, particularly a kind of method, device and uses thereof utilizing electron beam and UV treatment flue gas desulfurization and denitrification.
Background technology
Human health in the environmental pollution serious threat that atmosphere pollution brings.Wherein, the sulfur dioxide and the nitrogen oxide that comprise the large scale industry facilities exhaust such as thermal power plant, cement plant, garbage burning factory are one of main sources causing atmosphere pollution.Therefore, the flue gas desulfurization and denitrification problem of factory is the important process of thing of curbing environmental pollution at present.NO in the tail gas such as various large-scale diesel engine, engine of boat and ship, gas turbine
xcontent is higher, reduces the NO in these combustion engine tail gas
xconcentration is also the focus that people pay close attention to all the time.In addition, thermal power plant, cement plant, garbage burning factory etc. also give off a large amount of dioxin, and especially to produce the degree of concern that bioxin is subject to the highest for burning city domestic garbage.Dioxin is highly stable, and be difficult to natural degradation in the environment and eliminate, pole is insoluble in water, can be dissolved in majority of organic solvent, is the liposoluble substance of colorless and odorless, so be very easy to accumulate in vivo, serious to harm.Dioxin, except having carcinogenic toxicity, also has genotoxicity and genetoxic, directly endangers the Health and Living of descendants.Therefore dioxin contamination is the significant problem being related to mankind's living or death, must strictly be controlled.
The technology of electron beam irradiation desulphurization denitration is the purifying coal-fired flue gas technology that development in recent years is got up, and this technology has entered the commercial Application stage at present.This technology utilizes high-energy electron beam irradiation to contain sulfur dioxide (SO
2) and nitrogen oxide (NO
x) etc. the flue gas of pollutant, by ionization and the excitation of electron beam, produce the free radical with strong oxidizing property.Simultaneously under the condition passing into ammonia and steam, these free radicals at a terrific speed with the SO in flue gas
2and NO
xreaction, generates the accessory substance that main component is ammonium sulfate and ammonium nitrate.By accessory substance collector and dust arrester removing accessory substance, the flue gas be purified.
Fig. 1 is the apparatus structure schematic diagram of existing electron beam irradiation flue gas desulfurization and denitrification.This electron beam irradiation flue gas desulfurization and denitration technique flow process is: the flue gas first produced by coal-burning boiler 1 sends into flue gas pretreater 3 through the first flue 2, this flue gas pretreater 3 is provided with nozzle system 4, the suitable condition that cooling water makes flue gas cool-down be humidified to remove reaction can be sprayed, again flue gas is sent in the irradiation reaction device 7 of irradiation reaction system through the second flue 5, this irradiation reaction system is made up of irradiation reaction device 7 and Accelerating electron system 8, and certain stoichiometric ammonia is sprayed into by flow control valve 6 on the second flue 5, then mixed flue gas enters in irradiation reaction device 7 in the lump, under the electron beam irradiation effect that Accelerating electron system 8 produces, after a series of chemical reaction, oxysulfide (SO in flue gas
2) and nitrogen oxide (NO
x) generate ammonium sulfate and ammonium nitrate, enter accessory substance collector 9 through flue together with the flue gas after process and collect these products by delivery pipe 10, and as fertilizer application, the flue gas after accessory substance collector 9 processes is entered in air by chimney 11.
There is following defect in above-mentioned prior art:
1) when the process of electron beam irradiation desulphurization denitration, in order to reach predetermined removal efficiency, the beam intensity of electron beam is needed to exceed certain threshold value.And electron beam can off-energy and beam intensity in the process penetrating flue gas.Therefore, in irradiation direction, the efficiency of fume treatment sharply reduces;
2) flue gas that coal-burning boiler produces must first through spray cooling, and heat is not utilized effectively; Further, desulfurization and denitration synchronously process in same reactor, cannot realize desulfurization and denitration and all be in best reaction and process conditions;
3) adopt in the process of conditional electronic bundle irradiation desulphurization denitration process, the dioxin produced in boiler smoke also fails effectively to be removed.
In view of this, the invention provides a kind of desulfurization denitration method and the device that can overcome above-mentioned defect.
Summary of the invention
In order to solve the problems referred to above and the defect of prior art, the invention provides a kind of method and device of flue gas desulfurization and denitrification, the method and device can significantly improve the utilization ratio of electron beam in desulphurization denitration process, reduce the operating cost of system for desulfuration and denitration, the dioxin simultaneously produced in boiler or combustion engine flue gas also also can effectively be removed.
To achieve these goals, the invention provides a kind of method of desulfurizing and denitrifying flue gas by electron beam, comprise the following steps:
1) by the flue gas Water spray process that boiler or combustion engine produce, flue gas cool-down is made;
2) flue gas after cooling is mixed with ammonia, then carry out desulphurization denitration through Ultraviolet radiation and electron beam irradiation simultaneously.
In a preferred embodiment: the direction of described Ultraviolet radiation and the direction of described electron beam irradiation are relative direction.
In a preferred embodiment: described Ultraviolet radiation is ultraviolet relative exposure.
In a preferred embodiment: described Ultraviolet radiation is two bundle ultraviolet relative exposures.
In a preferred embodiment: described electron beam irradiation is electron beam relative lamp.
In a preferred embodiment: described electron beam irradiation is two beam electrons bundle relative lamp.
In a preferred embodiment: the reaction temperature that described Ultraviolet radiation and electron beam irradiation carry out desulphurization denitration is 60-100 DEG C.
In a preferred embodiment: the Ultraviolet radiation of described Ultraviolet radiation to be wavelength be 100-400nm.
In a preferred embodiment: the mode of described Water spray process is atomizing spray.
In a preferred embodiment: described Water spray is hydrogen peroxide spray.
The present invention also provides a kind of device of desulfurizing and denitrifying flue gas by electron beam, comprising:
Fume treatment tower, described fume treatment tower is provided with spray system; The exhanst gas outlet of described boiler or combustion engine is connected by the first flue with the smoke inlet of described fume treatment tower, and the exhanst gas outlet of described fume treatment tower connects irradiation reaction device by the second flue, and described second flue is provided with spray ammonia control valve;
Irradiation reaction device, this irradiation reaction device is provided with electron accelerator and ultraviolet generater.
In a preferred embodiment: described electron accelerator and described ultraviolet generater are separately positioned on the relative sidewall locations of described irradiation reaction device.
In a preferred embodiment: described electron accelerator is a pair, be separately positioned on the relative sidewall of described irradiation reaction device.
In a preferred embodiment: described ultraviolet generater is a pair, the relative sidewall locations of described irradiation reaction device is separately positioned on.
In a preferred embodiment: the bottom angled of described irradiation reaction device, arranges byproduct discharge at the lowest part of reactor bottom.
In a preferred embodiment: the port of export auxiliary connection product collector of described irradiation reaction device.
In a preferred embodiment: described spray system is atomizing sprinkling system.
In a preferred embodiment: described spray system is the system of water injection system or spray hydrogen peroxide.
The present invention also provides the purposes adopting the device of above-mentioned various flue gas desulfurization and denitrifications for the treatment of boiler or combustion engine flue gas.This purposes may be used for removing SOx, the NOx in boiler or combustion engine flue gas and dioxin simultaneously.
The flue gas that boiler or combustion engine produce is carried out one-step desulfurization denitration process respectively by fume treatment tower and irradiation reaction device by the present invention.
First flue gas reduces temperature by Water spray after boiler or combustion engine are discharged, then enters fume treatment tower after mixing with ammonia.The consumption of ammonia can draw according to stoichiometric amount.Water from the top spray of fume treatment tower and, fully contact mixing with flue gas with the gaseous mixture of ammonia.
The efficiency adopting the water smoke of the method for atomizing spray ejection and flue gas to contact with the gaseous mixture of ammonia is higher, because the size droplet diameter that spraying produces is less, reaction table area is larger, is more conducive to the generation of chemical reaction.SOx and NOx the water of ejection changed into the removal efficiency that hydrogen peroxide solution then significantly can promote first time desulphurization denitration process in above-mentioned spray process, this is because can be oxidized to H by hydrogen peroxide respectively
2sO
4and HNO
3, then be combined with ammonia and namely generate ammonium sulfate and ammonium nitrate, realize desulphurization denitration.
The temperature of flue gas after Water spray reaches 60-110 DEG C, then is blended in irradiation reaction device with ammonia and carries out desulfurization and denitration reaction.Research mechanism according to relevant desulphurization reaction shows, desulphurization reaction mainly relies on thermal chemical reaction.Desulphurization reaction principle is: the SOx in flue gas, O
2, H
2o and ammonia react generation ammonium sulfate.In irradiation reaction device, N contained in flue gas
2, O
2, H
2o and CO
2deng gas molecule after electron beam irradiation, be converted into a large amount of OH, O, HO
2deng oxyradical, there is oxidation reaction and generate H in SOx and NOx in these free radicals and flue gas at a terrific speed
2sO
4and HNO
3(see document: Electron-beam flue-gas treatment for multicomponent air-pollutioncontrol, Applied Energy 75 (2003) 145 – 154).The vaporific H produced
2sO
4and HNO
3with NH
3reaction generates sulfate of ammoniac and the ammonium nitrate of white powder.The research mechanism of relevant denitration reaction shows, electron beam irradiation reaction is larger to the influencing factor of denitration reaction.The Main Function of irradiation reaction device middle-ultraviolet lamp is: ultraviolet can by O
2and H
2o cracking generates OH free radical and O
3, thus the use amount of electron beam can be reduced, improve economy.The reaction mechanism of action of ultraviolet radiation is as follows:
H
2O+hν→H+·OH
O
2+hν→O(
1D)+O(
3P)
O (
1d)+M → O (
3p)+M (M=O
2or N
2)
O(
3P)+O
2+M→O
3+M
O
3+hν→O(
1D)+O
2
O(
1D)+H
2O→2·OH
It is not simple combination that technical scheme in the present invention utilizes ultraviolet and electron beam to carry out irradiation to mixed flue gas simultaneously.Electron beam and ultraviolet irradiation can produce the free radical of numerous species, comprise H, OH, H
2o
2, H
3o, HO
3, O
3deng.The effect of these free radicals in nitrogen oxides process is different, and the oxidation effectiveness of the radical pair sulfur dioxide that oxidisability is stronger and nitrogen oxide is better, more remarkable to the action effect of desulphurization denitration.Utilize ultraviolet and electron beam to carry out irradiation to mixed flue gas, its synergy is simultaneously: the H that electron beam can produce by ultraviolet
2o
2the OH useful to desulphurization denitration is further converted to Deng free radical.And the cost of ultraviolet irradiation device is well below electron accelerator, thus while guarantee desulfurization off sulfide effect, effectively reduce equipment cost and operating cost.
H
2o
2, free radical that the oxidisability such as OH is the strongest makes NOx, SO
2oxidized in the gas phase, change into solid-state ammonium nitrate and ammonium sulfate material.In irradiation reaction device, the reaction temperature of desulphurization denitration controls at 60-110 DEG C, and this temperature range can reach preferably SOx and NOx removal efficiency.
In above-mentioned mechanism, the dioxin in flue gas is oxidized decomposition under electron beam and ultraviolet double action also, thus reaches the technique effect simultaneously removing dioxin in flue gas.Except above-mentioned hydroxyl free radical, oxygen atom, ozone etc. produce except oxidation to dioxin, electron beam also can with dioxin molecule direct interaction, excited state molecule is become by Molecular Cloning for dioxin, when excited state molecule energy is greater than chemical bond energy, the fracture of chemical bond will be caused, the rearrangement of dioxin molecular structure or dislocation occur and is decomposed and removed.Ultraviolet irradiation then can produce significant facilitation to dioxin is Molecular Cloning for excited state.
Beneficial effect of the present invention is:
Flue gas is directly reached the better removal temperature of SOx and NOx by method and apparatus of the present invention after Water spray, when without the need to providing extra heating, can carry out desulfurization and denitration reaction simultaneously, simplifying technological process, decreasing equipment and run and drop into.Because ultraviolet generater is comparatively cheap and easy to get, so increase the power requirement that ultraviolet generater can reduce electron beam generating apparatus further in irradiation reaction device, thus investment and the operating cost of electron beam generating apparatus significantly can be reduced.In addition, the dioxin in irradiation reaction device under electron beam and ultraviolet double action in flue gas is also easily decomposed and removes.Method and apparatus of the present invention can be widely used in the process of various boiler (as: coal-burning boiler, garbage burning boiler, chemical industry incineration of waste boiler etc.) or combustion engine (as: diesel engine, gas turbine etc.) flue gas.
Accompanying drawing explanation
Fig. 1 is the structural representation of the desulfurizing and denitrifying flue gas by electron beam device of prior art;
Fig. 2 is the structural representation of the flue gas desulfurization and denitrification device of the embodiment of the present invention 1;
Fig. 3 is the relative position schematic diagram overlooking visual angle of electron accelerator in the irradiation reaction device of the embodiment of the present invention 1 and ultraviolet generater;
Fig. 4 is the structural representation of the flue gas desulfurization and denitrification device of the embodiment of the present invention 2;
Fig. 5 is the structural representation of the flue gas desulfurization and denitrification device of the embodiment of the present invention 3;
Fig. 6 is the electron accelerator at visual angle, irradiation reaction device longitudinal cross-section and the relative position schematic diagram of ultraviolet generater in the embodiment of the present invention 3;
Fig. 7 is the structural representation of the flue gas desulfurization and denitrification device of the embodiment of the present invention 4.
Detailed description of the invention
Embodiment 1
See Fig. 2, flue gas processes respectively by fume treatment tower and irradiation reaction device by the present invention.The flue-gas temperature that boiler 1 produces is 130 DEG C, SO in flue gas
xcontent is 300ppm, NOx content is 200ppm.
The each assembly of desulfurizing and denitrifying flue gas by electron beam device shown in Fig. 2 and annexation as follows:
Boiler 1 is connected with fume treatment tower 3 by the first flue 2;
Fume treatment tower 3, described fume treatment tower 3 is provided with spray system 4; The exhanst gas outlet of fume treatment tower 3 connects irradiation reaction device 7 with the second flue 5, and described second flue 5 is provided with spray ammonia control valve 6; Electron accelerator 8 installed by described irradiation reaction device 7, irradiation reaction device 7 sidewall installs ultraviolet generater 9.
First flue gas enters fume treatment tower 3 by the first flue 2 after boiler 1 is discharged, and reduces by controlling spray system 4 water spray the temperature making flue gas in fume treatment tower 3; The atomizing effect of shower water is controlled by the nozzle bore controlling spray system 4.Shower water by spray system 4 from the top spray of fume treatment tower 3, fully contact with the gaseous mixture of ammonia with flue gas.The gaseous mixture of steam and flue gas enters after the second flue 5 mixes with the ammonia controlling flow through spraying ammonia control valve 6 again and enters irradiation reaction device 7.The consumption of ammonia can draw according to stoichiometric amount.
The efficiency adopting the water smoke of the method for atomizing spray ejection and flue gas to contact with the gaseous mixture of ammonia is higher, is more conducive to the generation of chemical reaction.SOx and NOx if change the water that spray system 4 sprays into hydrogen peroxide solution in above-mentioned spray process, significantly can promote the efficiency of first step desulphurization denitration process, this is because can be oxidized to H by hydrogen peroxide respectively
2sO
4and HNO
3, then be combined with ammonia and namely generate ammonium sulfate and ammonium nitrate.
Under the condition taking water as spray agent, the mist that SOx, NOx, ammonia, steam and other smoke components form together the second flue 5 enters irradiation reaction device 7, carries out synchronized desulfuring and denitrifying process.Reaction temperature in irradiation reaction 7 is 60 DEG C.Under the irradiation of the electron beam of electron accelerator 8 generation, NOx and SOx generation chemical reaction is removed.While electron beam irradiation, ultraviolet generater 9 (uviol lamp) produces Ultraviolet radiation flue gas, significantly promotes that NOx and SOx is converted into ammonium nitrate and ammonium sulfate through electron beam irradiation reaction.The dioxin contained in flue gas is also decomposed under electron beam and ultraviolet dual irradiation and removes in irradiation reaction device 7.
Accessory substance ammonium nitrate and ammonium sulfate are discharged from the bottom 10 of irradiation reaction device 7, and as fertilizer application.Flue gas after irradiation reaction device 7 processes is entered in air by chimney 11.
Electron accelerator 8 and ultraviolet generater 9 can be arranged on the inner wall position of irradiation reaction device 7, there is the permutation and combination method (as: horizontal direction irradiation and/or vertical direction irradiation) of multiple position, all can produce certain irradiation effect to flue gas.In the present embodiment, the electron accelerator 8 in irradiation reaction device 7 and ultraviolet generater 9 are set to subtend in horizontal direction and irradiate (as shown in Figure 3).Electron beam and ultraviolet overlapping region can be increased like this, be conducive to irradiation flue gas more fully.Setting electron-beam dose is 3kGy, and the ultraviolet wavelength that UV emitter produces is 300nm, and power is 20W, the removing index and can reach 94% and 79% respectively of sulfur dioxide and nitrogen oxide.If use hydrogen peroxide instead for spray agent in the process of first step desulphurization denitration, then the removing index and can be promoted to 94% and 82% respectively further of sulfur dioxide and nitrogen oxide.According to prior art, the index that removes of sulfur dioxide and nitrogen oxide is only 70% and 42% at identical conditions.
Embodiment 2
See Fig. 4, flue gas processes respectively by fume treatment tower and irradiation reaction device by the present invention.The flue-gas temperature that boiler 1 produces is 150 DEG C, and in flue gas, SOx content is 280ppm, NOx content is 200ppm.
The each assembly of flue gas desulfurization and denitrification device shown in Fig. 4 and annexation as follows:
Boiler 1 connects fume treatment tower 3 by the first flue 2; Fume treatment tower 3, described fume treatment tower 3 is provided with spray system 4; The exhanst gas outlet of described fume treatment tower 3 connects the arrival end of irradiation reaction device 7 by the second flue 5; Described second flue 5 is provided with spray ammonia control valve 6; The port of export of described irradiation reaction device 7 connects accessory substance collector 11; Install electron accelerator 8 above described irradiation reaction device 7, install ultraviolet generater 9 below described irradiation reaction device 7, electron accelerator 8 and ultraviolet generater 9 subtend are arranged.
First flue gas enters fume treatment tower 3 by the first flue 2 and reduces temperature after boiler 1 discharge.Make temperature in fume treatment tower 3 at about 80 DEG C by controlling spray system 4; The atomizing effect of shower water is controlled by the nozzle bore controlling spray system 4.Shower water by spray system 4 from the top spray of fume treatment tower 3, fully contact mixing with flue gas.Mixed flue gas enters after the second flue 5 mixes with the ammonia controlling flow through spraying ammonia control valve 6 again and enters irradiation reaction device 7.The consumption of ammonia can draw according to stoichiometric amount.
Adopt the contact surface area of the water smoke of the method ejection of atomizing spray and smoke contacts larger, be more conducive to the generation of chemical reaction.Discharge fume treatment tower 5 together with the mist that SOx, NOx and ammonia, steam and other smoke components form, then enter irradiation reaction device 7, carry out synchronized desulfuring and denitrifying process.The reaction temperature of flue gas in irradiation reaction 7 is 80 DEG C.Under the irradiation of the electron beam of electron accelerator 8 generation, NOx and SOx generation chemical reaction is removed.While electron beam irradiation, ultraviolet generater 9 (uviol lamp) produces Ultraviolet radiation flue gas, significantly promotes that NOx and SOx is converted into ammonium nitrate and ammonium sulfate through electron beam irradiation reaction.The dioxin contained in flue gas is also decomposed under electron beam and ultraviolet dual irradiation and removes in irradiation reaction device 7.
Accessory substance collector 10 collects byproduct of reaction ammonium nitrate and ammonium sulfate, and by 11 discharges bottom collector, accessory substance can be used as Fertilizer application.Flue gas after accessory substance collector 10 processes is entered in air by chimney 12.
In the present embodiment, when to set electron-beam dose be 3kGy, the ultraviolet wavelength that UV emitter produces is 100nm, and power is 50W, the removing index and can reach 88% and 90% respectively of sulfur dioxide and nitrogen oxide.According to prior art, the index that removes of sulfur dioxide and nitrogen oxide is only 67% and 21% at identical conditions.
Embodiment 3
See Fig. 5, flue gas processes respectively by fume treatment tower and irradiation reaction device by the present invention.The flue-gas temperature that boiler 1 produces is 150 DEG C, and in flue gas, SOx content is 280ppm, NOx content is 200ppm.
Approximate in each assembly of flue gas desulfurization and denitrification device shown in Fig. 5 and annexation and embodiment 2, shown in specific as follows:
Boiler 1 connects fume treatment tower 3 by the first flue 2; Fume treatment tower 3, described fume treatment tower 3 is provided with spray system 4; The exhanst gas outlet of described fume treatment tower 3 connects the arrival end of irradiation reaction device 7 by the second flue 5; Described second flue 5 is provided with spray ammonia control valve 6; The port of export of described irradiation reaction device 7 connects accessory substance collector 11.
Ultraviolet generater in irradiation reaction device 7 is a pair, is separately positioned on the relative sidewall locations of irradiation reaction device 7 (only indicating a ultraviolet generater 91 in Fig. 5).The electron accelerator 81 and 82 that irradiation reaction device 7 is installed is a pair, is separately positioned on the relative sidewall of irradiation reaction device 7.Fig. 6 is the longitudinal cross-section schematic diagram of irradiation reaction device 7 in the present embodiment, and electron accelerator 81 and 82 subtend is arranged in the vertical direction of irradiation reaction device 7, and ultraviolet generater 91 and 92 subtend is arranged in the horizontal direction of irradiation reaction device 7.Adopt above-mentioned design that the electron beam in irradiation reaction device and ultraviolet can be made to distribute more even, realize Electron Beam intensity of flow and the absorption energy of electron beam in flue gas realizes being uniformly distributed in the space of irradiation zone, effectively can avoid the region occurring being difficult to carry out fully reaction in irradiation reaction device.
First flue gas enters fume treatment tower 3 by the first flue 2 and reduces temperature after boiler 1 discharge.The temperature in fume treatment tower 3 is made to reach about 110 DEG C by controlling spray system 4; The atomizing effect of shower water is controlled by the nozzle bore controlling spray system 4.Shower water by spray system 4 from the top spray of fume treatment tower 3, fully contact mixing with flue gas.Mixed flue gas enters after the second flue 5 mixes with the ammonia controlling flow through spraying ammonia control valve 6 again and enters irradiation reaction device 7.The consumption of ammonia can draw according to stoichiometric amount.
Adopt the contact surface area of the water smoke of the method ejection of atomizing spray and smoke contacts larger, be more conducive to the generation of chemical reaction.Discharge fume treatment tower 3 together with the mist that SOx, NOx and ammonia, steam and other smoke components form, then enter irradiation reaction device 7, carry out synchronized desulfuring and denitrifying process.The reaction temperature of flue gas mist in irradiation reaction 7 is 100 DEG C.In the present embodiment, in irradiation reaction device 7, realize electron beam and ultraviolet irradiation flue gas simultaneously.Ultraviolet radiation is two bundle ultraviolet relative exposures, and electron beam irradiation is two beam electrons bundle relative lamp.NOx and raw Ultraviolet radiation flue gas under the irradiation of the electron beam of electron accelerator 81 and 82 generation, significantly promote that NOx and SOx reacts through electron beam irradiation and be converted into ammonium nitrate and ammonium sulfate.The dioxin contained in flue gas is also decomposed under electron beam and ultraviolet dual irradiation and removes in irradiation reaction device 7.Owing to eliminating reaction dead angle, the removal efficiency of NOx, SOx and dioxin is all promoted.
Accessory substance collector 10 collects byproduct of reaction ammonium nitrate and ammonium sulfate, and by 11 discharges bottom collector, accessory substance can be used as Fertilizer application.Flue gas after accessory substance collector 10 processes is entered in air by chimney 12.
In the present embodiment, when to set electron-beam dose be 3kGy, the ultraviolet wavelength that UV emitter produces is 400nm, and power is 40W, the removing index and can reach 90% and 92% respectively of sulfur dioxide and nitrogen oxide.According to prior art, the index that removes of sulfur dioxide and nitrogen oxide is only 67% and 21% at identical conditions.
Embodiment 4
See Fig. 7, flue gas processes respectively by fume treatment tower and irradiation reaction device by the present invention.The flue-gas temperature that the gas turbine 1 of gas-firing produces is 350 DEG C, and in flue gas, NOx content is 180ppm.
Approximate in each assembly of flue gas desulfurization and denitrification device shown in Fig. 7 and annexation and embodiment 2, shown in specific as follows:
The gas turbine 1 of gas-firing connects fume treatment tower 3 by the first flue 2; Fume treatment tower 3, described fume treatment tower 3 is provided with spray system 4; The exhanst gas outlet of described fume treatment tower 3 connects the arrival end of irradiation reaction device 7 by the second flue 5; Described second flue 5 is provided with spray ammonia control valve 6; The port of export of described irradiation reaction device 7 connects accessory substance collector 11.
Ultraviolet generater in irradiation reaction device 7 is a pair, is separately positioned on the relative sidewall locations of irradiation reaction device 7 (only indicating one of them ultraviolet generater 91 in Fig. 7).The electron accelerator 81 and 82 that irradiation reaction device 7 is installed is a pair, is separately positioned on the relative sidewall of irradiation reaction device 7.
First flue gas enters fume treatment tower 3 by the first flue 2 and reduces temperature after gas turbine 1 discharge of gas-firing.The temperature in fume treatment tower 3 is made to reach about 100 DEG C by controlling spray system 4; The atomizing effect of shower water is controlled by the nozzle bore controlling spray system 4.Shower water by spray system 4 from the top spray of fume treatment tower 3, fully contact mixing with flue gas.Mixed flue gas enters after the second flue 5 mixes with the ammonia controlling flow through spraying ammonia control valve 6 again and enters irradiation reaction device 7.The consumption of ammonia can draw according to stoichiometric amount.
Adopt the contact surface area of the water smoke of the method ejection of atomizing spray and smoke contacts larger, be more conducive to the generation of chemical reaction.Discharge fume treatment tower 3 together with the mist that NOx and ammonia, steam and other smoke components form, then enter irradiation reaction device 7, carry out synchronous denitration process.The reaction temperature of flue gas mist in irradiation reaction 7 is 100 DEG C.In the present embodiment, in irradiation reaction device 7, realize electron beam and ultraviolet irradiation flue gas simultaneously.Ultraviolet radiation is two bundle ultraviolet relative exposures, and electron beam irradiation is two beam electrons bundle relative lamp.Under the irradiation of the electron beam of electron accelerator 81 and 82 generation, NOx generation chemical reaction is removed.While electron beam irradiation, ultraviolet generater 91 and 92 produces Ultraviolet radiation flue gas, significantly promotes that NOx is converted into ammonium nitrate through electron beam irradiation reaction.
Byproduct of reaction ammonium nitrate collected by accessory substance collector 10, and by 11 discharges bottom collector, accessory substance can be used as Fertilizer application.Flue gas after accessory substance collector 10 processes is entered in air by chimney 12.
In the present embodiment, when to set electron-beam dose be 3kGy, the ultraviolet wavelength that UV emitter produces is 200nm, and power is 40W, the removing index and can reach 92% of nitrogen oxide.According to prior art, the index that removes of nitrogen oxide is only 28% at identical conditions.
For purposes of illustration, foregoing description is given with reference to specific embodiment.But above-mentioned exemplary discussion is not want exhaustive to limit the invention to disclosed exact form.In view of above-mentioned instruction, many modifications and variations can be had.Selecting and describing these embodiments is to explain principle of the present invention and practical application thereof better, enables others skilled in the art utilize the present invention best thus and is suitable for each embodiment of conceived concrete purposes and various amendment.
Claims (19)
1. a method for flue gas desulfurization and denitrification, is characterized in that comprising the following steps:
1) by the flue gas Water spray process that boiler or combustion engine produce, flue gas cool-down is made;
2) flue gas after cooling is mixed with ammonia, then carry out desulphurization denitration through Ultraviolet radiation and electron beam irradiation simultaneously.
2. the method for a kind of flue gas desulfurization and denitrification according to claim 1, is characterized in that: the direction of described Ultraviolet radiation and the direction of described electron beam irradiation are relative direction.
3. the method for a kind of flue gas desulfurization and denitrification according to claim 1, is characterized in that: described Ultraviolet radiation is ultraviolet relative exposure.
4. the method for a kind of flue gas desulfurization and denitrification according to claim 3, is characterized in that: described Ultraviolet radiation is two bundle ultraviolet relative exposures.
5. the method for a kind of flue gas desulfurization and denitrification according to claim 1, is characterized in that: described electron beam irradiation is electron beam relative lamp.
6. the method for a kind of flue gas desulfurization and denitrification according to claim 5, is characterized in that: described electron beam irradiation is two beam electrons bundle relative lamp.
7. the method for flue gas desulfurization and denitrification as claimed in any of claims 1 to 6, is characterized in that: the reaction temperature that described Ultraviolet radiation and electron beam irradiation carry out desulphurization denitration is 60-110 DEG C.
8. the method for flue gas desulfurization and denitrification as claimed in any of claims 1 to 6, is characterized in that: the Ultraviolet radiation of described Ultraviolet radiation to be wavelength be 100-400nm.
9. the method for flue gas desulfurization and denitrification as claimed in any of claims 1 to 6, is characterized in that: the mode of described Water spray process is atomizing spray.
10. the method for a kind of flue gas desulfurization and denitrification according to claim 9, is characterized in that: described Water spray is hydrogen peroxide spray.
The device of 11. 1 kinds of flue gas desulfurization and denitrifications, is characterized in that comprising:
Fume treatment tower, described fume treatment tower is provided with spray system; The exhanst gas outlet of described boiler or combustion engine is connected by the first flue with the smoke inlet of described fume treatment tower, and the exhanst gas outlet of described fume treatment tower connects irradiation reaction device by the second flue, and described second flue is provided with spray ammonia control valve;
Irradiation reaction device, this irradiation reaction device is provided with electron accelerator and ultraviolet generater.
The device of 12. flue gas desulfurization and denitrifications according to claim 11, is characterized in that: described electron accelerator and described ultraviolet generater are separately positioned on the relative sidewall locations of described irradiation reaction device.
The device of 13. a kind of flue gas desulfurization and denitrifications according to claim 11, is characterized in that: described electron accelerator is a pair, is separately positioned on the relative sidewall of described irradiation reaction device.
The device of 14. a kind of flue gas desulfurization and denitrifications according to claim 11, is characterized in that: described ultraviolet generater is a pair, is separately positioned on the sidewall locations that described irradiation reaction device is relative.
15., according to claim 11 to the device of the flue gas desulfurization and denitrification in 14 described in any one, is characterized in that: the bottom angled of described irradiation reaction device, arranges byproduct discharge at the lowest part of reactor bottom.
16., according to claim 11 to the device of the flue gas desulfurization and denitrification in 14 described in any one, is characterized in that: the port of export auxiliary connection product collector of described irradiation reaction device.
17., according to claim 11 to the device of the flue gas desulfurization and denitrification in 14 described in any one, is characterized in that: described spray system is atomizing sprinkling system.
The device of 18. a kind of flue gas desulfurization and denitrifications according to claim 17, is characterized in that: described spray system is the system of water injection system or spray hydrogen peroxide.
19. 1 kinds by the purposes of the device of the flue gas desulfurization and denitrification in claim 11 to 18 described in any one for the treatment of boiler or combustion engine flue gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410743597.9A CN104474859B (en) | 2014-12-08 | 2014-12-08 | A kind of method of flue gas desulfurization and denitrification, device and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410743597.9A CN104474859B (en) | 2014-12-08 | 2014-12-08 | A kind of method of flue gas desulfurization and denitrification, device and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104474859A true CN104474859A (en) | 2015-04-01 |
| CN104474859B CN104474859B (en) | 2016-08-17 |
Family
ID=52749544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410743597.9A Active CN104474859B (en) | 2014-12-08 | 2014-12-08 | A kind of method of flue gas desulfurization and denitrification, device and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104474859B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106178863A (en) * | 2016-08-16 | 2016-12-07 | 胡安平 | A kind of desulfurization denitration method of boiler smoke |
| CN108043194A (en) * | 2016-01-11 | 2018-05-18 | 张文国 | A kind of industrial refuse cracking incineration tail gas denitrating system |
| CN109499326A (en) * | 2018-12-13 | 2019-03-22 | 江苏菲达环保科技有限公司 | A kind of method of flue gas desulfurization and denitrification |
| CN110566989A (en) * | 2019-10-18 | 2019-12-13 | 佛山丰汇环保工程有限公司 | Environment-friendly flue gas denitration device |
| CN110947287A (en) * | 2019-12-13 | 2020-04-03 | 西安润川环保科技有限公司 | Flue gas desulfurization and denitrification method |
| CN114849434A (en) * | 2022-05-09 | 2022-08-05 | 福建龙净环保股份有限公司 | Prilling tower system and tail gas treatment device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88103260A (en) * | 1987-06-01 | 1988-12-21 | 株式会社荏区制作所 | The method of radiation treatment waste gas and device thereof |
| EP0460230A1 (en) * | 1989-12-22 | 1991-12-11 | Ebara Corporation | Method and apparatus for treating exhaust gas by multi-stage irradiation with electron beam |
| CN1233195A (en) * | 1996-10-09 | 1999-10-27 | 零排放技术公司 | Barrier discharge conversion of SO2 and NOx to acids |
| CN1565707A (en) * | 2003-06-12 | 2005-01-19 | 北京大学 | Denitrifying and desulfurizing method of flue gas and its specialized equipment |
-
2014
- 2014-12-08 CN CN201410743597.9A patent/CN104474859B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88103260A (en) * | 1987-06-01 | 1988-12-21 | 株式会社荏区制作所 | The method of radiation treatment waste gas and device thereof |
| EP0460230A1 (en) * | 1989-12-22 | 1991-12-11 | Ebara Corporation | Method and apparatus for treating exhaust gas by multi-stage irradiation with electron beam |
| CN1233195A (en) * | 1996-10-09 | 1999-10-27 | 零排放技术公司 | Barrier discharge conversion of SO2 and NOx to acids |
| CN1565707A (en) * | 2003-06-12 | 2005-01-19 | 北京大学 | Denitrifying and desulfurizing method of flue gas and its specialized equipment |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108043194A (en) * | 2016-01-11 | 2018-05-18 | 张文国 | A kind of industrial refuse cracking incineration tail gas denitrating system |
| CN108043194B (en) * | 2016-01-11 | 2019-12-03 | 安徽金森源环保工程有限公司 | A kind of industrial refuse cracking incineration tail gas denitrating system |
| CN106178863A (en) * | 2016-08-16 | 2016-12-07 | 胡安平 | A kind of desulfurization denitration method of boiler smoke |
| CN109499326A (en) * | 2018-12-13 | 2019-03-22 | 江苏菲达环保科技有限公司 | A kind of method of flue gas desulfurization and denitrification |
| CN110566989A (en) * | 2019-10-18 | 2019-12-13 | 佛山丰汇环保工程有限公司 | Environment-friendly flue gas denitration device |
| CN110947287A (en) * | 2019-12-13 | 2020-04-03 | 西安润川环保科技有限公司 | Flue gas desulfurization and denitrification method |
| CN114849434A (en) * | 2022-05-09 | 2022-08-05 | 福建龙净环保股份有限公司 | Prilling tower system and tail gas treatment device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104474859B (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104474859B (en) | A kind of method of flue gas desulfurization and denitrification, device and application thereof | |
| CN104474858B (en) | A kind of method of flue gas desulfurization and denitrification, device and uses thereof | |
| CN101485957B (en) | Device and method of simultaneous desulfuration and denitration for flue gas using ozone oxygenation combined with double-tower washing | |
| Chmielewski et al. | Operational experience of the industrial plant for electron beam flue gas treatment | |
| CN102343212B (en) | Denitration process combining co-oxidation of ozone and hydrogen peroxide with wet absorption | |
| CN101716463B (en) | Simultaneous removing device and method of various pollutants by electrocatalytical oxidation combining lime-gypsum method | |
| CN103990365B (en) | The flue gas purifying method of a kind of ozone/hydrogen peroxide induced radical and system | |
| KR100378695B1 (en) | Method and apparatus for treating waste gases by exposure to electron beams | |
| CN104043325B (en) | The flue gas purifying method of a kind of ozone activation persulfate and device | |
| US7198698B1 (en) | Method of photochemically removing ammonia from gas streams | |
| CN102068878A (en) | Method for treating odors produced by drying sewage sludge | |
| CN204973545U (en) | SOx/NOx control demercuration system simultaneously based on hydroxyl and sulfate radical oxidation | |
| Dong et al. | The environmental cost of recovering energy from municipal solid waste | |
| CA2924319A1 (en) | Treatment of nitrogen oxides in flue gas streams | |
| CN104258702B (en) | A kind of method of desulfurizing and denitrifying flue gas by electron beam and device | |
| CN109603462A (en) | A kind of technique using plasma purification flue gas of garbage furnace | |
| RU2698835C2 (en) | Method and device for partial removal of contaminants from process gas flow | |
| CN107497265A (en) | The integrated fume cleaning system and method for ozone cooperative microwave-excitation flying dust induced radical | |
| CN204275786U (en) | A kind of flue gas desulfurization and denitrification device | |
| WO2020098574A1 (en) | Method and apparatus for purifying waste incineration flue gas | |
| CN104324610B (en) | A kind of desulfurization denitration method and device | |
| CN109260919A (en) | The integration desulfurization denitration device and its desulfurization denitration method of ozone combination urea | |
| CN103263835B (en) | Iron bromide mercury removal compound liquid and method for removing mercury of flue gas by use of same | |
| CN108905407A (en) | The method that compound flue gas desulfurization and denitrification takes off white minimum discharge processing | |
| CN209865669U (en) | Traditional Chinese medicine plaster production waste gas treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |