CN104841256B - A kind of boiler smoke treatment zero draining system and method - Google Patents
A kind of boiler smoke treatment zero draining system and method Download PDFInfo
- Publication number
- CN104841256B CN104841256B CN201510279237.2A CN201510279237A CN104841256B CN 104841256 B CN104841256 B CN 104841256B CN 201510279237 A CN201510279237 A CN 201510279237A CN 104841256 B CN104841256 B CN 104841256B
- Authority
- CN
- China
- Prior art keywords
- ozone
- flue gas
- oxidation reactor
- boiler
- spray gun
- 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.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000779 smoke Substances 0.000 title claims abstract description 17
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 84
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000003546 flue gas Substances 0.000 claims abstract description 52
- 239000007921 spray Substances 0.000 claims abstract description 51
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 50
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 47
- 230000003647 oxidation Effects 0.000 claims abstract description 46
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 21
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 11
- 231100000719 pollutant Toxicity 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000002425 crystallisation Methods 0.000 claims description 15
- 230000008025 crystallization Effects 0.000 claims description 15
- 239000003513 alkali Substances 0.000 claims description 12
- 238000006477 desulfuration reaction Methods 0.000 claims description 11
- 230000023556 desulfurization Effects 0.000 claims description 11
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- 239000000112 cooling gas Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 239000005864 Sulphur Substances 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 6
- 239000003245 coal Substances 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 235000019504 cigarettes Nutrition 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 208000028659 discharge Diseases 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005367 electrostatic precipitation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- -1 includes dry method Chemical compound 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of boiler smoke Zero discharging system and method, including the oxidation reactor and desulfurizing tower for producing the boiler of flue gas, being sequentially connected with by pipeline and boiler, wherein：The oxidation reactor is also associated with ozone and prepared and allocation unit, and prepared by the ozone and allocation unit includes ozone generator and at least two spray guns being connected with ozone generator, and the spray gun stretches into the inside of oxidation reactor.Further, the system can be in the flue gas in oxidation reactor in the range of each lance ejection nitrogen oxides, the concentration of oxysulfide adjust ozone straying quatity and each spray gun in each spray gun the location of in oxidation reactor.The present invention can adjust the straying quatity of ozone in quantity, distributing position and each spray gun of spray gun according to the difference of the concentration of flue gas pollutants of each reaction zone in flue, the adjustable control of the ozone amount in each reaction zone is realized, efficiency is improved and reduces processing cost.
Description
Technical field
The present invention relates to a kind of smoke processing system and method, and in particular to a kind of improvement suitable for boiler smoke it is de-
Nitre, desulfurization, the zero-discharge treatment system and method for dedusting and demercuration, belong to air contaminant treatment field.
Background technology
Coal can produce substantial amounts of oxysulfide, nitrogen oxides, dust and heavy metal during burning.Wherein, one
Component of the partial contamination thing from fuel itself, and most of pollutant is then produced in combustion.These flue gas pollutants
Generation great destruction will be caused to environment.During " 12 ", country strengthens the improvement to coal-burning boiler so that cigarette
The discharge of gas pollutant has obtained control to a certain extent.
At present, fume treatment technology main in industry includes：1) technology of processing oxysulfide mainly includes dry method, half
Dry and wet etc., most of country's generating plant pulverized coal boiler is using Wet Limestone/gypsum progress desulfurization at present；2) nitrogen oxides
Treatment technology mainly include low nitrogen oxide burning technology, SNCR (SNCR) technology, SCR and (selectively urge
Change reducing process) technology, oxidizing process and mixed powder technology.Most of country's generating plant pulverized coal boiler uses low nitrogen oxide burning at present
+ SCR technology carries out denitration；3) dedusting technology is mainly using technologies such as bag-type dust, electric precipitations, current country's generating plant pulverized coal boiler
Mainly use electrostatic precipitation technology；4) country does not have professional effective implementation technology temporarily at present for heavy metal processing, advanced with reference to foreign countries
Experience from the point of view of, mainly include stove in activated carbon injection and water-bath removing heavy metals metal.However, above-mentioned treatment technology, is present not
With the secondary pollution problem of degree.For example, desulfurization technology is present, water consumption is high, sewage, dust can be also caused while desulfurization
Deng secondary pollution；SCR technology is then needed to use substantial amounts of catalyst, and strict with environmental protection index, catalyst is also needed into one
Step filling, and the link such as follow-up catalyst maintenance regeneration causes the secondary pollutions such as sewage, dust once more.With link demand
Raising, control of the environmental regulation to pollutant proposes more strict requirements, and above-mentioned treatment technology has been difficult to realize more
Strict emission request.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of system of boiler smoke treatment zero draining and
Method, can be achieved the zero-emission of boiler smoke.
To achieve the above object, the present invention uses following technical scheme：
The invention provides a kind of boiler smoke Zero discharging system, including produce the boiler of flue gas, pass through pipeline and boiler
The oxidation reactor and desulfurizing tower being sequentially connected with, wherein：The oxidation reactor is also associated with ozone and prepared and allocation unit, institute
Stating ozone preparation and allocation unit includes ozone generator and at least two spray guns being connected with ozone generator, and the spray
Rifle stretches into the inside of oxidation reactor.
Preferably：Prepared by the ozone and allocation unit also includes the flow control valve of ozone flow in each spray gun of control
And the PLC control unit of automatic running control is realized to the preparation of whole ozone and allocation unit.
Preferably：The system can be according to the nitrogen oxidation in the flue gas in oxidation reactor in the range of each lance ejection
Thing, the concentration of oxysulfide adjust the position that ozone straying quatity and each spray gun in each spray gun are residing in oxidation reactor
Put.
Preferably：The spray gun is included in gun body and the shower nozzle located at gun body front end, the gun body
The ozonizer that portion passes through for ozone provided with one, the end of the ozonizer and afterbody respectively with shower nozzle and ozone supplied equipment phase
Even, the inside of the gun body is injected with the drying cooling gas around ozonizer.
Preferably：SCR reactors and/or deduster are additionally provided between the boiler and oxidation reactor.
Preferably：Top in the desulfurizing tower is provided with water distribution unit, and the water distribution unit includes water distribution pipeline and set
It is placed in water-distribution nozzle down-set in water distribution pipeline, and the water intake end of the water distribution pipeline and the alkali lye outside desulfurizing tower
Tank is connected；The bottom of the desulfurizing tower is connected with evaporation crystallization equipment.
Present invention also offers a kind of method handled using system as described above boiler smoke, it include with
Lower process step：
The flue gas that a, boiler are produced enters oxidation reactor, by the nitrogen oxides in flue gas, sulphur in the presence of ozone
Oxides are high price nitrogen oxides and sulfur trioxide；
B, will be treated by ozone after flue gas feeding desulfurizing tower to remove the oxysulfide in flue gas.
Preferably：In the step a, the mol ratio of ozone amount and nitrogen oxides in effluent, oxysulfide is 0.8-2：
1, and reaction time of the ozone in oxidation reactor is 0.3-1 seconds, the reaction temperature in oxidation reactor is 115-125
℃。
More preferably：The flue gas that the boiler is produced first removes most nitrogen oxides and/or electricity through SCR reactors
Deduster enters back into oxidation reactor after removing the particulate pollutant in flue gas.
Further preferably：While step b carries out flue gas desulfurization processing, spray washing is carried out to flue gas with alkali lye
To absorb high-valence state nitrogen oxides and the oxysulfide in flue gas, and pair and the cleaning solution that produces of desulfurization washing is evaporated crystallization
Processing
The beneficial effects of the present invention are processing system of the invention can be according to nitrogen oxygen in the flue gas of each reaction zone in flue
The straying quatity of ozone in quantity, distributing position and each spray gun of compound, the difference of sulfoxide concentration to adjust spray gun, is realized
The accurate adjustable control of ozone amount in each reaction zone, improves efficiency and significantly reduces the consumption of ozone
Amount, reduces processing cost.Using the processing system and method for the present invention, oxysulfide, the removing of nitrogen oxides in flue gas
Rate is up to more than 90%, and desulphurization and denitration efficiency high, operating cost is low.
Brief description of the drawings
Fig. 1 shows the structural representation of boiler smoke treatment zero draining system of the present invention；
Fig. 2 shows the structural representation of ozone allocation unit of the present invention；
Fig. 3 shows the structural representation of spray gun of the present invention；
Fig. 4 shows that the structure of the boiler smoke processing exhaust system according to the preferred embodiment of the present invention is shown
It is intended to.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings.
As shown in figure 1, boiler smoke treatment zero draining system of the present invention, including by pipeline and boiler 1 sequentially
The oxidation reactor 2 and desulfurizing tower 3 of connection, the oxidation reactor 2 are also connected with ozone by pipeline and prepared and distribution list
Member 21, wherein, as shown in Fig. 2 ozone of the present invention is prepared and allocation unit 21 includes ozone generator 211 and with leading to
At least two spray guns 212 that piping is connected with ozone generator 211, the spray gun stretches into the inside of oxidation reactor 2, its
In, the ozone generator 211 prepares high-concentrated ozone using oxygen, and the ozone of preparation is passed through into oxidation by spray gun 212
Reacted in reactor 2 with flue gas, the nitrogen oxides in flue gas, oxysulfide are oxidized to the higher-priced nitrogen for being dissolved in water
Oxide and sulfur trioxide；In the present invention, the position of each spray gun 212, the ozone amount sprayed into can spray according in oxidation reactor 2
The concentration of the pollutants such as nitrogen oxides in effluent, oxysulfide residing for rifle 212 in spray regime is adjusted, it is preferable that institute
Spray gun 212 is stated by the internal perisporium equidistantly distributed radially along oxidation reactor 2.As shown in figure 3, spray gun 212 of the present invention
Including gun body 2121 in a tubular form and the shower nozzle 2122 located at the front end of gun body 2121, in the gun body 2121
Portion is connected provided with an ozonizer 2123 passed through for ozone, the end of the ozonizer 2123 with shower nozzle 2122, and its afterbody is set
There is the ozone inlet 2124 that can be connected with ozone supplied equipment.In addition, the inside of the gun body 2121, ozonizer 2123
Surrounding located at the cooling gas inlet 2125 of the afterbody of gun body 2121 also by being injected with dry cooling gas, the cooling gas
Body can be air, oxygen or nitrogen.Further, shower nozzle 2122 of the present invention, the center is provided with a rectangle spray
Mouth (not shown), the aperture area of the rectangular nozzle is the 5-10% of the cross-sectional area of shower nozzle 2122, and then controls spray
The spray angle of mouth is 15 ° -30 °, to ensure in the range of this spray angle, and the atomised form of nozzle is taper or sector, really
The good jet atomization effect of shower nozzle is protected, will not be both ejected into flue inner wall, the swept area of maximum is can guarantee that again so that smelly
Oxygen is more uniformly distributed fully with the nitrogen oxides in flue gas, oxysulfide reaction.In addition, in the present invention, each portion of the spray gun
The material of part can use stainless steel such as 316L or titanium, and be provided with adpting flange 2126 in the afterbody of gun body 2121 with by institute
Spray gun is stated removably to be fixed in flue reactor.
In addition, ozone of the present invention is prepared and allocation unit 21 also includes controlling ozone flow in each spray gun 212
Flow control valve and the PLC control unit 213 that automatic running control is realized to the preparation of whole ozone and allocation unit, work as boiler
When system stops, i.e., when not producing flue gas, the distribution of ozone can be cut off immediately, and the ozone of the present invention is prepared and allocation unit
21 are additionally provided with ozone leakage alarming device (not shown), once occurring ozone leakage, warning device can be sent out the very first time
Go out to warn to exist side by side and automatically cut off the supply of ozone.
Further, as shown in figure 3, boiler smoke treatment zero draining system of the present invention may also include by pipeline
SCR reactors 4 and/or deduster 5 between boiler 1 and oxidation reactor 2, wherein, the preferred electric precipitation of the deduster 5
Device.Further, the top in the desulfurizing tower 3 is additionally provided with water distribution unit, and the water distribution unit includes water distribution pipeline and set
It is placed in water-distribution nozzle down-set in water distribution pipeline, and the water intake end of the water distribution pipeline and the alkali outside desulfurizing tower 3
Flow container 31 be connected, and be provided with the alkali liquid tank 31 concentration be 10-20% sodium hydroxide, calcium hydroxide or ammonia spirit,
And the flue gas in desulfurization washing tower 3 is sprayed from top to bottom by the water distribution unit in desulfurizing tower 3, the desulfurizing tower 3
Bottom can connect an evaporation crystallization equipment 6, to be evaporated crystallization, and evaporation knot to the cleaning solution that spray is formed in desulfurizing tower 3
The condensed water that crystalline substance is produced may return to be recycled in alkali liquid tank 31, sodium sulphate, ammonium sulfate, the nitric acid of evaporative crystallization generation
Reuse after the crystal salts such as ammonium can be discharged.
Fire coal boiler fume is handled using processing exhaust system as described above of the invention, its process step bag
Include：
A, the flue gas produced from boiler 1 enter oxidation reactor 2, by the nitrogen oxidation in flue gas in the presence of ozone
Thing, oxysulfide are further oxidized to be dissolved in the high price nitrogen oxides and sulfur trioxide of water；In the present invention, the ozone leads to
Cross ozone generator 211 and prepare high-concentrated ozone using oxygen, and the ozone of preparation is passed through by oxidation reactor by spray gun 212
Reacted, further, sprayed into by each spray gun 212 in total ozone amount and flue gas in oxidation reactor 2 with flue gas in 2
Nitrogen oxides, the mol ratio of oxysulfide are 0.8-2：1, and reaction time of the ozone in oxidation reactor 2 is 0.3-1
Reaction temperature in second, oxidation reactor 2 is 115-125 DEG C；Further：The ozone amount that every spray gun 212 is sprayed into can root
Concentration according to pollutants such as nitrogen oxides in effluent, the oxysulfides in oxidation reactor 2 residing for spray gun 212 in spray regime is entered
Row adjustment；
B, will be treated by ozone after flue gas feeding desulfurizing tower 3 further to remove the oxysulfide in flue gas.
Further, above-mentioned process step may also include step：
C, the flue gas produced from boiler 1 first remove most nitrogen oxides and/or electric cleaner 5 through SCR reactors 4
Remove and oxidation reactor 2 is entered back into after the particulate pollutant in flue gas, and then lift treatment effect and the reduction oxidation of flue gas
The consumption of ozone in reactor 2.
In addition, the process step may also include step：
D, desulfurizing tower 3 to flue gas carry out desulfurization process while, come from the alkali lye in alkali liquid tank 31 in water distribution unit
In the presence of to flue gas carry out spray washing, to absorb high-valence state nitrogen oxides and the oxysulfide in flue gas；And step
E, the cleaning solution produced after step d desulfurization carrying out washing treatment enter and crystallization are evaporated in evaporation crystallization equipment 6
Processing, and the condensed water that evaporative crystallization is produced may return to and recycled in alkali liquid tank 31, the sulfuric acid of evaporative crystallization generation
Reuse after the crystal salts such as sodium, ammonium sulfate, ammonium nitrate can be discharged.
Embodiment 1
With processing system and method as described above of the invention, certain water-tube boiler flue gas is handled, the pending cigarette
In gas：NOXConcentration be 100mg/m3, smoke content be 200mg/m3、SOXConcentration be 800mg/m3.The present embodiment is using attached
System and method shown in Fig. 3 is handled the flue gas, wherein, four sprays are provided with altogether in ozone preparation and allocation unit 21
Rifle 212, and be radially set in qually spaced on the internal perisporium of oxidation reactor 2, the reaction temperature control in oxidation reactor 2 exists
120 DEG C, the NO sprayed into by four spray guns 212 in total ozone amount and flue gas in oxidation reactor 2X、SOXMol ratio be
1.2：1, and residence time of the ozone in oxidation reactor 2 is 0.3s.NO in flue gasX、SOXBy oxygen in oxidation reactor 2
Nitrogen oxides, the oxysulfide of high-valence state are melted into, is then fed into desulfurizing tower 3,10% in alkali liquid tank 31 is come from
Sodium hydroxide solution spray effect under, nitrogen oxides, the oxysulfide of the high-valence state in flue gas are absorbed into corresponding salt,
Crystallization treatment is evaporated to the salt generated in desulfurizing tower by evaporation crystallization equipment 6, and the condensed water that evaporative crystallization is produced can
It is back in alkali liquid tank 31 and is recycled, reuse after the crystal salt that evaporative crystallization is produced can be discharged.The water-tube boiler cigarette
Gas entered after above-mentioned processing, NO in flue gasXConcentration be reduced to 10mg/m3, smoke content be reduced to 100mg/m3、SOXConcentration
It is reduced to 80mg/m3, realize effective removal of the pollutants such as sulfureous in flue gas oxide, nitrogen oxides.
The present invention is by preferred embodiment having carried out detailed explanation.However, by studying carefully above, to each
The change and increase of embodiment are also apparent to those of ordinary skill in the art.It is intended that it is all this
A little changes and increase fall in the protection domain of the claims in the present invention.Similar numbering refers to similar element.For
For the sake of clear, there may be the situation for amplifying some lines, layer, element, part or feature in the accompanying drawings.
Term used herein is only that specific embodiment is illustrated, and is not intended to and limits the invention.
Unless otherwise defined, all terms (including technical term and scientific terminology) used herein with it is of the art
The understanding of those skilled in the art is identical.Must also it is clear that, except herein have clearly definition in addition to, it is generally fixed in such as dictionary
The term of justice should be construed in the linguistic context of this specification and correlation technique can have the consistent meaning, without what should be explained
Idealization or undue formalization.Known function or structure are in briefly and clearly consider or repeat no more.
Claims (7)
1. a kind of boiler smoke Zero discharging system, including the oxidation for producing the boiler of flue gas, being sequentially connected with by pipeline and boiler
Reactor and desulfurizing tower, it is characterised in that：The oxidation reactor is also associated with ozone and prepared and allocation unit, the ozone system
Standby and allocation unit includes ozone generator and at least two spray guns being connected with ozone generator, and the spray gun stretches into oxygen
Change the inside of reactor；Wherein：
Nitrogen oxides of the system in the flue gas in oxidation reactor in the range of each lance ejection, the concentration of oxysulfide
To adjust ozone straying quatity and each spray gun in each spray gun location in oxidation reactor；Also, each spray gun presses footpath
To the internal perisporium equidistantly distributed along oxidation reactor；
The spray gun includes smelly provided with a confession inside gun body and the shower nozzle located at gun body front end, the gun body
The ozonizer that oxygen passes through, the end of the ozonizer and afterbody are connected with shower nozzle and ozone supplied equipment respectively, the spray gun sheet
The inside of body is injected with the drying cooling gas around ozonizer；
The center of the shower nozzle is provided with a rectangular nozzle, and the aperture area of the rectangular nozzle is the cross section of the shower nozzle
Long-pending 5%-10%, the spray angle of the nozzle is 15 ° -30 °.
2. system according to claim 1, it is characterised in that：Prepared by the ozone and allocation unit also includes controlling each spray
In rifle the flow control valve of ozone flow and to whole ozone prepare and allocation unit realize automatic running control PLC control
Unit.
3. system according to claim 1 or 2, it is characterised in that：It is additionally provided between the boiler and oxidation reactor
SCR reactors and/or deduster.
4. system according to claim 1 or 2, it is characterised in that：Top in the desulfurizing tower is provided with water distribution unit, institute
Water distribution unit is stated including water distribution pipeline and it is arranged at water-distribution nozzle down-set in water distribution pipeline, and the water distribution pipeline enters
Water end (W.E.) is connected with the alkali liquid tank outside desulfurizing tower；The bottom of the desulfurizing tower is connected with evaporation crystallization equipment.
5. a kind of method handled using system as claimed in claim 1 or 2 boiler smoke, it is characterised in that：Bag
Include following process step：
The flue gas that a, boiler are produced enters oxidation reactor, aoxidizes the nitrogen oxides in flue gas, sulphur in the presence of ozone
Thing is oxidized to high price nitrogen oxides and sulfur trioxide；
B, will be treated by ozone after flue gas feeding desulfurizing tower to remove the oxysulfide in flue gas；
In the step a, the mol ratio of ozone amount and nitrogen oxides in effluent, oxysulfide is 0.8-2：1, and ozone is in oxidation
Reaction time in reactor is 0.3-1 seconds, the reaction temperature in oxidation reactor is 115-125 DEG C.
6. method according to claim 5, it is characterised in that：The flue gas that the boiler is produced first is removed through SCR reactors
Most nitrogen oxides and/or electric cleaner enter back into oxidation reactor after removing the particulate pollutant in flue gas.
7. method according to claim 5, it is characterised in that：While step b carries out flue gas desulfurization processing, with alkali lye
Flue gas is carried out spray washing to absorb high-valence state nitrogen oxides and the oxysulfide in flue gas, and pair and desulfurization washing produce
Cleaning solution is evaporated crystallization treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510279237.2A CN104841256B (en) | 2015-05-27 | 2015-05-27 | A kind of boiler smoke treatment zero draining system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510279237.2A CN104841256B (en) | 2015-05-27 | 2015-05-27 | A kind of boiler smoke treatment zero draining system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104841256A CN104841256A (en) | 2015-08-19 |
| CN104841256B true CN104841256B (en) | 2017-10-10 |
Family
ID=53841472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510279237.2A Expired - Fee Related CN104841256B (en) | 2015-05-27 | 2015-05-27 | A kind of boiler smoke treatment zero draining system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104841256B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105032183A (en) * | 2015-08-25 | 2015-11-11 | 北京宜泽环保科技有限责任公司 | Urea solution-based SCR smoke denitration treatment system and method |
| CN105664688A (en) * | 2016-04-15 | 2016-06-15 | 北京宜泽环保科技有限责任公司 | Flue gas comprehensive denitration treatment system and treatment technology |
| CN108636085A (en) * | 2018-04-24 | 2018-10-12 | 北京宜泽环保科技有限责任公司 | A kind of high-pressure discharging device and exhaust treatment system |
| CN110935302B (en) * | 2019-11-27 | 2022-04-01 | 西安热工研究院有限公司 | Dynamically adjustable flue ozone oxidation NOx control system and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102772990B (en) * | 2012-08-02 | 2015-01-28 | 浙江天蓝环保技术股份有限公司 | Denitration process and device of gas-phase oxidation and wet-process absorption |
| CN103331095B (en) * | 2013-07-16 | 2015-01-14 | 国家海洋局天津海水淡化与综合利用研究所 | Simultaneous desulphurization and denitration device for seawater smoke with membrane absorption method, as well as process of device |
| CN204042942U (en) * | 2014-07-22 | 2014-12-24 | 山东神华山大能源环境有限公司 | A kind of device utilizing coupling technique to realize boiler smoke qualified discharge |
| CN104474857B (en) * | 2014-11-20 | 2016-07-06 | 浙江大学 | NO in the preposition oxidative absorption coal-fired flue-gas of bioactive moleculexAnd SO2Method and apparatus |
| CN204735094U (en) * | 2015-05-27 | 2015-11-04 | 北京宜泽环保科技有限责任公司 | Zero discharge system is handled to boiler flue gas |
-
2015
- 2015-05-27 CN CN201510279237.2A patent/CN104841256B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104841256A (en) | 2015-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104841256B (en) | A kind of boiler smoke treatment zero draining system and method | |
| CN205109354U (en) | Burn burning furnace fume treatment auxiliary | |
| CN101537310B (en) | Semidry premodulation limestone-gypsum flue gas desulfurizing method | |
| HU222552B1 (en) | Flue gas scrubbing and waste heat recovery system | |
| JP2011050941A (en) | Device for treating exhaust gas | |
| CN105854575A (en) | Method for simultaneously treating SO3 and desulfurization waste water in exhaust gas of coal-fired power plant | |
| CN104984656B (en) | Multistage internal circulation semi-dry method desulfurization, denitrification and demercuration integrated device | |
| CN103499098B (en) | A kind of high concentration organic waste liquid burning equipment and technique | |
| CN106166434A (en) | A kind of ozone oxidation double tower ammonia process of desulfurization denitrating technique and system thereof | |
| CN101543724A (en) | Ammonia desulphurization method suitable for sintering flue gas treatment | |
| CN102794090A (en) | Flue gas purifier utilizing combination of spray-drying method and hydrated lime powder injection | |
| CN103657367B (en) | The desulfurization of a kind of list tower calcium method turns device and the technique of the double-tower type ammonia process of desulfurization | |
| RU2698835C2 (en) | Method and device for partial removal of contaminants from process gas flow | |
| CN206799197U (en) | A kind of undersaturation flue gas condensing crystallizing desulfurization wastewater zero-discharge treatment system | |
| CN104801162A (en) | Near-zero emission combined technology of smoke desulfuration and denitration | |
| BG63713B1 (en) | Method and device for desulphurization by electron beam irradiation | |
| CN108190986A (en) | A kind of flue is classified pre- thermal evaporation desulfurization wastewater Zero discharging system and its method of work | |
| CN204865513U (en) | Coal fired boiler flue gas desulfurization denitration equipment | |
| CN204865530U (en) | Spout calcium desulfurization low temperature denitrification facility in coal fired boiler flue gas stove | |
| CN103990374A (en) | Novel desulfurization, denitrification, decarburization and dust removal purification combined device for coal-fired flue gas | |
| CN211435768U (en) | Flue gas treatment device for semi-dry desulfurization and low-temperature SCR denitration of carbide slag | |
| CN109224808A (en) | A kind of carbon baking kiln gas ultra-clean discharge cleaning equipment and purification method | |
| CN210367050U (en) | Concentration and evaporation device for zero discharge of power plant wastewater | |
| CN206375693U (en) | The humidifier and flue spray evaporation device of good antiscale property | |
| CN208082179U (en) | The governing system of FCC flue gases |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171010 |