CN108579370A - The denitrification apparatus and method of denitration of the molten gold of wet method and/or Rong Yin workshop sections flue gas - Google Patents
The denitrification apparatus and method of denitration of the molten gold of wet method and/or Rong Yin workshop sections flue gas Download PDFInfo
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- CN108579370A CN108579370A CN201810411164.1A CN201810411164A CN108579370A CN 108579370 A CN108579370 A CN 108579370A CN 201810411164 A CN201810411164 A CN 201810411164A CN 108579370 A CN108579370 A CN 108579370A
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- flue gas
- ozone
- saline solution
- oxidation
- denitration
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- 239000003546 flue gas Substances 0.000 title claims abstract description 208
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 196
- 238000000034 method Methods 0.000 title claims abstract description 63
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000010931 gold Substances 0.000 title claims abstract description 30
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 30
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 163
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical group [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 82
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 54
- 230000003647 oxidation Effects 0.000 claims abstract description 51
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 51
- 239000003518 caustics Substances 0.000 claims abstract description 47
- 239000000779 smoke Substances 0.000 claims abstract description 38
- 239000007789 gas Substances 0.000 claims abstract description 29
- 230000001590 oxidative effect Effects 0.000 claims abstract description 29
- 230000008569 process Effects 0.000 claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Substances [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 123
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 60
- 239000003513 alkali Substances 0.000 claims description 37
- 239000012670 alkaline solution Substances 0.000 claims description 32
- 239000007864 aqueous solution Substances 0.000 claims description 19
- 238000005406 washing Methods 0.000 claims description 17
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical class [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 13
- 230000009102 absorption Effects 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 13
- 150000003839 salts Chemical class 0.000 claims description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000006227 byproduct Substances 0.000 claims description 11
- 235000019504 cigarettes Nutrition 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 3
- 239000000908 ammonium hydroxide Substances 0.000 claims description 3
- 238000002425 crystallisation Methods 0.000 claims description 3
- 230000008025 crystallization Effects 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 2
- 239000004408 titanium dioxide Substances 0.000 claims 1
- 229910002651 NO3 Inorganic materials 0.000 abstract description 9
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 abstract description 9
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 abstract description 7
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 45
- 238000005516 engineering process Methods 0.000 description 16
- 239000000203 mixture Substances 0.000 description 13
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 10
- 239000003638 chemical reducing agent Substances 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 6
- 239000010970 precious metal Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 239000004202 carbamide Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- -1 flue gas Compound Chemical class 0.000 description 4
- 239000011265 semifinished product Substances 0.000 description 4
- 229910002089 NOx Inorganic materials 0.000 description 3
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 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 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical class ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 241001417490 Sillaginidae Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
-
- 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
- B01D53/75—Multi-step processes
-
- 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
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- 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
- B01D53/73—After-treatment of removed components
-
- 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
- B01D53/76—Gas phase processes, e.g. by using aerosols
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/10—Oxidants
- B01D2251/104—Ozone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
-
- 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
- B01D2258/025—Other waste gases from metallurgy plants
-
- 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
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The present invention provides a kind of molten gold of wet method and/or the denitrification apparatus and method of denitration of Rong Yin workshop sections flue gas.The denitrification apparatus includes：First caustic wash unit, saline solution exports after being absorbed with smoke inlet, initial wash exhanst gas outlet and first；There is oxidizing and denitrating ozone unit exhanst gas outlet after initial wash smoke inlet and oxidation, initial wash smoke inlet to be connected with initial wash exhanst gas outlet；And second caustic wash unit, have smoke inlet after oxidation, flue gas emission mouth and second absorb after saline solution export, smoke inlet and exhanst gas outlet is connected after aoxidizing after oxidation.The nitrogen oxides in flue gas absorb first with the first caustic wash unit and forms nitrate or nitrite and obtains initial wash flue gas；When carrying out denitration process to initial wash flue gas using oxidizing and denitrating ozone unit, the consumption of ozone can be reduced, the operating cost of denitrification apparatus is reduced.
Description
Technical field
The present invention relates to fume treatment fields, molten golden and/or Rong Yin workshop sections flue gas de- in particular to a kind of wet method
Nitre device and method of denitration.
Background technology
The molten gold of the wet method of precious metal smelting industry, the intermittently operated of Rong Yin workshop sections, just will produce during molten gold, molten silver containing
The flue gas of nitrogen oxides, NO and NO in flue gas2Concentration with the consumption of nitric acid during molten sample, and change, NO2Concentration by
It is high to Low, NO concentration from low to high, wherein much part-time NO2Content occupies the majority, and is more than the 50% of nitrogen oxides total amount.
It is different from power plant's denitration flue gas, existing denitration technology, mainly SCR and SNCR technologies, SCR denitration technology, by ammonia
Gas is injected into as denitrfying agent in high-temperature flue gas denitrification apparatus, under the effect of the catalyst by NO in flue gasxIt is decomposed into N2With
H2O, reaction formula are as follows：4NO+4NH3+O2→4N2+6H2O；NO+NO2+2NH3→2N2The reaction of+3H2O above-mentioned twos is general logical
It crosses and is realized using catalyst appropriate, above-mentioned reaction can effectively carry out within the temperature range of 200 DEG C~450 DEG C, in NH3/
In the case of NO=1,80~90% denitration efficiency can be reached.SCR denitration technology works as front ring with its removal efficiency height, adaptation
Guaranteed request and obtain power industry pay much attention to and be widely applied.In the stringent developed country of environmental requirement such as Germany, day
The states such as sheet, the U.S., Canada, Holland, Austria, Sweden and Denmark SCR denitration technology has been using most, most ripe skill
One of art.But the technology needs to use catalyst, and requires reaction temperature in 200 DEG C~450 DEG C ranges, and heavy metal smelts row
The molten gold of industry, the flue-gas temperature of Rong Yin workshop sections discharge are about 30 DEG C~80 DEG C, if the temperature that flue gas to SCR is needed, energy
It consumes larger, increases the cost pressure of enterprise.SNCR denitration technology, by NH3, the reducing agents such as urea spray into Boiler Furnace and NOxIt carries out
Selective reaction, do not have to catalyst, it is therefore necessary to high-temperature region be added reducing agent, reducing agent spray into fire box temperature be 850~
1100 DEG C of region, rapid thermal decomposition is at NH3, with the NO in flue gasxReaction generates N2And water.SNCR gas denitrifying technologies take off
Nitre efficiency is generally 30%~80%, is influenced by boiler structure size very big.Using SNCR technologies, current trend is to use urea
Instead of ammonia as reducing agent.Reaction principle：Within the scope of 850~1100 DEG C, NH3Or urea restores NOxKey reaction be：
NH3For reducing agent 4NH3+4NO+O2→4N2+6H2O
Urea is reducing agent NO+CO (NH2)2+1/2O2→2N2+CO2+H2O
The technology maturation is reliable, and reducing agent effective rate of utilization is high, and system run all right, EM equipment module takes up little area, no pair
Product and secondary pollution.But applied to the smoke gas treatment of precious metal smelting industry molten gold, Rong Yin workshop sections, equally existing needs with SCR
The problem of heating flue gas, operating cost are higher.
In addition to this, NO in flue gas2Content is higher, in conventional scr and SNCR denitration technology the consumption of reducing agent will increase
Greatly, ozone denitration is used instead, can solve the consumption of ozone, and the reduction temperature needed for ozone denitration is relatively low, therefore make
The operating cost of enterprise has been saved with ozone denitration.
Ozone denitration technology carries out open application in power plant, chemical industry, but has no molten golden, molten in precious metal smelting
It is applied in silver-colored workshop section's smoke gas treatment.This is because power plant, chemical industry nitrogen oxides in effluent concentration are generally more stable, it is convenient for
The implementation of ozone denitration application, in addition NO in flue gas2Concentration accounts for about NOxThe 5% of concentration.And the molten gold of precious metal smelting, Rong Yin workshop sections
Flue gas is with the extension of molten sample time, the variation of nitrogen oxides in effluent one side concentration moment, another aspect NO2Early period concentration very
Height, peak concentration are about 15000mg/Nm3, with the growth in reaction time, NO2Concentration continuously decreases, and NO concentration gradually increases,
Finally it is maintained essentially at NO2/ NO concentration ratios are 1/1.Due to the molten gold of precious metal smelting, in Rong Yin workshop sections flue gas NO contents compared with
It is more, if carrying out denitration process with conventional ozone method of denitration, enterprise investment height, operating cost can be caused high, enterprise can not receive,
And take up a large area, enterprise cannot achieve.
Invention content
The main purpose of the present invention is to provide denitrification apparatus and the denitrations of a kind of molten gold of wet method and/or Rong Yin workshop sections flue gas
Method, to solve the problems, such as that method of denitration is of high cost in the prior art.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of molten gold of wet method and/or Rong Yin workshop sections
The denitrification apparatus of flue gas, the denitrification apparatus include：First caustic wash unit has smoke inlet, initial wash exhanst gas outlet and the
Saline solution exports after one absorption；Oxidizing and denitrating ozone unit has exhanst gas outlet after initial wash smoke inlet and oxidation, washes for the first time
Smoke inlet is washed with initial wash exhanst gas outlet to be connected；And second caustic wash unit, there is smoke inlet, flue gas emission after oxidation
Saline solution exports after mouth and the second absorption, and smoke inlet is connected with exhanst gas outlet after oxidation after oxidation.
Further, above-mentioned first caustic wash unit includes：First caustic wash tower, have the first alkali liquor inlet, smoke inlet, just
Saline solution exports after secondary washing exhanst gas outlet and the first absorption；First lye supply equipment, is connected with the first alkali liquor inlet；It is preferred that the
One caustic wash unit further includes the first flue gas analyzer, and smoke inlet is connected with the first flue gas analyzer to detect the nitrogen oxygen in flue gas
Compound concentration, the first lye supply equipment are connected with the first flue gas analyzer and adjust the supply of water according to nitrous oxides concentration
Amount.
Further, above-mentioned oxidizing and denitrating ozone unit includes：Oxidizing and denitrating ozone reactor, with ozone inlet and just
Secondary washing smoke inlet；Ozone supplied equipment, is connected with ozone inlet；It is preferred that oxidizing and denitrating ozone unit further includes the second flue gas
Analyzer, initial wash smoke inlet are connected dense to detect the nitric oxide in initial wash flue gas with the second flue gas analyzer
Degree, ozone supplied equipment are connected with the second flue gas analyzer and adjust the supply of ozone according to nitric oxide concentration.
Further, above-mentioned second caustic wash unit includes：Second caustic wash tower has flue gas after the second alkali liquor inlet, oxidation
Saline solution exports after entrance, flue gas emission mouth and second absorb；Second lye supply equipment, is connected with alkali liquor inlet；It is preferred that second
Caustic wash unit further includes third flue gas analyzer, and smoke inlet is connected with third flue gas analyzer to detect cigarette after oxidation after oxidation
Nitrous oxides concentration in gas, the second lye supply equipment are connected with third flue gas analyzer and are adjusted according to nitrous oxides concentration
The supply of lye.
Further, above-mentioned denitrification apparatus further includes：Evaporator there is dilute saline solution entrance and dense saline solution to export, dilute saline solution
Saline solution outlet is connected after entrance is absorbed with saline solution outlet after the first absorption and second；Crystallizer has dense saline solution entrance and by-product
Salt exports, and dense saline solution entrance is connected with the outlet of dense saline solution.
According to another aspect of the present invention, a kind of molten golden and/or Rong Yin workshop sections flue gas the method for denitration of wet method is provided, it should
Method of denitration includes：First time washing is carried out to flue gas using the first alkaline solution, initial wash flue gas and first is obtained and absorbs
Saline solution afterwards；Oxidizing and denitrating ozone processing, flue gas after being aoxidized are carried out to initial wash flue gas；Using the second alkaline solution to oxygen
Flue gas is washed after change, obtain can discharging flue gas and second absorb after saline solution.
Further, in above-mentioned flue gas nitric oxide production concentration, the concentration of nitrogen dioxide≤2000mg/Nm3, flue gas
Treating capacity≤20000Nm3/h。
Further, above-mentioned first alkaline solution and the second alkaline solution are each independently sodium hydrate aqueous solution, carbon
Acid sodium aqueous solution and/or ammonium hydroxide during being washed to flue gas preferably by the first alkaline solution, control nitrogen oxygen in flue gas
The molar ratio 1 of compound and the first alkaline solution neutral and alkali substance：0.9~1.5；Preferably by the second alkaline solution to cigarette after oxidation
During gas is washed, the molar ratio 1 of nitrogen oxides in effluent and the second alkaline solution neutral and alkali substance after control oxidation：
0.9~1.5.
Further, above-mentioned method of denitration further includes being evaporated crystallization treatment to saline solution after absorption to obtain by-product salt.
Further, it is above-mentioned to initial wash flue gas carry out oxidizing and denitrating ozone processing during, ozone with wash for the first time
It is 1.6~2.5 to wash the nitric oxide production mass ratio in flue gas：1.
It applies the technical scheme of the present invention, it is general in view of the content of nitrogen dioxide in the molten gold of wet method and/or Rong Yin workshop sections flue gas
All over higher, therefore the nitrogen oxides in flue gas absorb first with the first caustic wash unit and forms nitrate or nitrous acid
Salt, the nitrogen oxides in the nitrogen oxides of obtained initial wash flue gas greatly reduce；Using oxidizing and denitrating ozone unit pair
When initial wash flue gas carries out denitration process, nitric oxide more fully can carry out haptoreaction with ozone, therefore can be more
It is efficiently low that the oxygen so that in flue gas is arranged at nitrogen dioxide, and due to the first caustic wash unit in oxidation of nitric oxide therein
Change nitrogen and reach reduction, therefore the consumption of ozone can be reduced in this step, reduces the operating cost of denitrification apparatus；Followed by
Second caustic wash unit carries out second of alkali cleaning to flue gas after oxidation, and lye is carried out with the remaining nitrogen oxides in flue gas after oxidation
Absorption forms nitrate or nitrite, and gained saline solution can be used as semi-finished product or be used as product to sell after processing,
Proceeds of sale further reduced the overall operation cost of denitrification apparatus.And by above-mentioned denitrification apparatus treated cigarette
Denitration standard is fully achieved in gas, can realize flue gas emission.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows the structure diagram of the denitrification apparatus shown according to an embodiment of the present.
Wherein, above-mentioned attached drawing includes the following drawings label：
01, acid solution configurator；
10, the first caustic wash unit；11, the first caustic wash tower；12, the first lye supply equipment；13, the first flue gas analyzer；
20, oxidizing and denitrating ozone unit；21, oxidizing and denitrating ozone reactor；22, ozone supplied equipment；23, the second flue gas
Analyzer；
30, the second caustic wash unit；31, the second caustic wash tower；32, the second lye supply equipment；33, third flue gas analyzer；
41, evaporator；42, crystallizer.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As the application background technology is analyzed, NO in the molten gold of precious metal smelting, Rong Yin workshop sections flue gas2Content and NO contents
Change as workshop section carries out, and is finally maintained essentially at NO2/ NO concentration ratios are 1/1, when using SCR and SNCR technologies, by
In NO2Content is higher, in conventional scr and SNCR denitration technology the consumption of reducing agent will will increase；Relative to power-plant flue gas, NO contains
It measures more, if carrying out denitration process with conventional ozone method of denitration, can lead to that enterprise investment is high, operating cost height, enterprise can not
Receive, and take up a large area, enterprise cannot achieve.In order to solve the problems, such as that existing method of denitration is of high cost, the application provides
The denitrification apparatus and method of denitration of a kind of molten gold of wet method and/or Rong Yin workshop sections flue gases.
In a kind of typical embodiment of the application, it is molten golden and/or Rong Yin workshop sections flue gas de- to provide a kind of wet method
Nitre device, as shown in Figure 1, the denitrification apparatus includes the first caustic wash unit 10, oxidizing and denitrating ozone unit 20 and the second alkali cleaning list
Member 30, saline solution exports after the first caustic wash unit 10 is absorbed with smoke inlet, initial wash exhanst gas outlet and first；Ozone oxidation
Denitration unit 20 has exhanst gas outlet after initial wash smoke inlet and oxidation, initial wash smoke inlet and initial wash flue gas
Outlet is connected；Saline solution outlet after second caustic wash unit 30 is absorbed with smoke inlet, flue gas emission mouth and second after oxidation, oxidation
Smoke inlet is connected with exhanst gas outlet after oxidation afterwards.
It is generally higher in view of the content of nitrogen dioxide in the molten gold of wet method and/or Rong Yin workshop sections flue gas, therefore first with the
One caustic wash unit 10, which to the nitrogen oxides in flue gas absorb, forms nitrate or nitrite, obtained initial wash flue gas
Nitrogen oxides in nitrogen oxides greatly reduce；Denitration is being carried out to initial wash flue gas using oxidizing and denitrating ozone unit 20
When processing, nitric oxide can more fully carry out haptoreaction with ozone, therefore more efficient low can be aoxidized therein one
Nitrogen oxidation at nitrogen dioxide, and due to the first caustic wash unit 10 setting so that flue gas in nitric oxide reach reduction,
The consumption that ozone can be reduced in this step, reduces the operating cost of denitrification apparatus；It is right followed by the second caustic wash unit 30
Flue gas carries out second of alkali cleaning after oxidation, and lye, which with the remaining nitrogen oxides in flue gas after oxidation absorb, forms nitrate
Or nitrite, and gained saline solution can be used as semi-finished product or after processing be used as product sell, proceeds of sale into
One step reduces the overall operation cost of denitrification apparatus.And treated that denitration is fully achieved in flue gas by above-mentioned denitrification apparatus
Standard can realize flue gas emission.
As shown in Figure 1, it is preferred that the first caustic wash unit 10 include the first caustic wash tower 11 and the first lye supply equipment 12, first
Saline solution exports after caustic wash tower 11 is absorbed with the first alkali liquor inlet, smoke inlet, initial wash exhanst gas outlet and first；First alkali
Liquid supply equipment 12 is connected with the first alkali liquor inlet.Using independently arranged first lye supply equipment 12 to the first caustic wash tower 11
Water is supplied, ensure that the flexibility that this process lye supply is adjusted.
In addition to further increasing the utilization rate of lye with cost-effective, preferably the first caustic wash unit 10 further includes first
Flue gas analyzer 13, smoke inlet are connected with the first flue gas analyzer 13 to detect the nitrous oxides concentration in flue gas, the first alkali
Liquid supply equipment 12 is connected with the first flue gas analyzer 13 and adjusts the supply of water according to nitrous oxides concentration.According to the first cigarette
The nitrous oxides concentration that qi leel analyzer 13 detects adjusts the water of the first lye supply equipment 12 supply in real time, realizes lye to nitrogen
Oxide fully absorbs, and improves the utilization rate of lye and the yield of salt.
Above-mentioned oxidizing and denitrating ozone unit 20 includes oxidizing and denitrating ozone reactor 21 and ozone supplied equipment 22, ozone oxygen
Changing Benitration reactor 21 has ozone inlet and initial wash smoke inlet；Ozone supplied equipment 22 is connected with ozone inlet.It adopts
Ozone is supplied to oxidizing and denitrating ozone reactor 21 with independently arranged ozone supplied equipment 22, ensure that ozone supplied amount is adjusted
Flexibility.In addition to further increase the utilization rate of ozone, preferably above-mentioned oxidizing and denitrating ozone unit 20 further includes second
Flue gas analyzer 23, smoke inlet are connected with the second flue gas analyzer 23 to detect the nitric oxide concentration in flue gas, and ozone supplies
It answers equipment 22 to be connected with the second flue gas analyzer 23 and adjusts the supply of ozone according to nitric oxide concentration.According to the second flue gas
The nitric oxide concentration that analyzer 23 detects adjusts the ozone amount of the supply of ozone supplied equipment 22 in real time, realizes ozone and an oxidation
The abundant reaction of nitrogen improves ozone utilization rate.
In the application another kind preferred embodiment, as shown in Figure 1, above-mentioned second caustic wash unit 30 includes the second alkali cleaning
Tower 31 and the second lye supply equipment 32, the second caustic wash tower 31 have the second alkali liquor inlet, secondary washing smoke inlet, flue gas row
Saline solution exports after putting mouth and absorbing；Second lye supply equipment 32 is connected with alkali entrance.It is supplied using independently arranged second lye
It answers equipment 32 to supply lye to the second caustic wash tower 31, ensure that the flexibility that alkali supply is adjusted.
The utilization rate of lye is with cost-effective in order to further increase, and preferably above-mentioned second caustic wash unit 30 further includes third
Flue gas analyzer 33, smoke inlet is connected with third flue gas analyzer 33 with the nitrogen oxides in flue gas after detection oxidation after oxidation
Concentration, the second lye supply equipment 32 are connected with third flue gas analyzer 33 and adjust the supply of lye according to nitrous oxides concentration
Amount.The nitrous oxides concentration detected according to third flue gas analyzer 33 adjusts the lye of the second lye supply equipment 32 supply in real time
Amount, realization lye are fully reacted with nitrogen oxides, improve the utilization rate of lye.
In order to improve the value of 30 obtained saline solution of the first caustic wash unit 10 and the second caustic wash unit, preferably above-mentioned denitration
Device further includes evaporator 41 and crystallizer 42, and there is evaporator 41 dilute saline solution entrance and dense saline solution to export, dilute saline solution entrance with
Saline solution outlet is connected after saline solution outlet is absorbed with second after first absorption；There is crystallizer 42 dense saline solution entrance and by-product salt to go out
Mouthful, dense saline solution entrance is connected with the outlet of dense saline solution.Saline solution is carried out at further concentration using evaporator 41 and crystallizer 42
Reason, obtains by-product salt, which runs producer as byproduct export trade, for denitrification apparatus and increase income, reduces denitration
The overall operation cost of device.
In another typical embodiment of the application, it is molten golden and/or Rong Yin workshop sections flue gas to provide a kind of wet method
Method of denitration, the method for denitration include：First time washing is carried out to flue gas using the first alkaline solution, obtains initial wash flue gas
Saline solution after being absorbed with first；Oxidizing and denitrating ozone processing, flue gas after being aoxidized are carried out to initial wash flue gas；Utilize the second alkali
Property solution flue gas after oxidation is washed, obtain can discharging flue gas and second absorb after saline solution.
It is generally higher in view of the content of nitrogen dioxide in the molten gold of wet method and/or Rong Yin workshop sections flue gas, therefore first to flue gas
In nitrogen oxides carry out absorb form nitrate or nitrite, the nitrogen oxygen in the nitrogen oxides of obtained initial wash flue gas
Compound greatly reduces；When carrying out denitration process to initial wash flue gas, nitric oxide can more fully be connect with ozone
Touch reaction, thus can it is more efficient it is low by oxidation of nitric oxide therein at nitrogen dioxide, and since first time alkali cleaning makes cigarette
Nitric oxide in gas reaches reduction, therefore the consumption of ozone can be reduced in this step, reduce the operation of denitrification apparatus at
This；Then second of alkali cleaning is carried out to flue gas after oxidation, lye is absorbed with the remaining nitrogen oxides in flue gas after oxidation
Nitrate or nitrite are formed, and gained saline solution can be used as semi-finished product or be used as product to sell after processing, sell
Profit further reduced the overall operation cost of denitrification apparatus.And treated that flue gas is complete by above-mentioned denitrification apparatus
Reach denitration standard entirely, can realize flue gas emission.
The various flue gases that the above-mentioned method of denitration of the application is suitable for handling the molten gold of wet method and/or Rong Yin workshop sections generate, especially
It is suitable for nitric oxide production concentration, the concentration of nitrogen dioxide≤2000mg/Nm3Flue gas, such as be suitable for nitrogen oxidation
Object peak value is 2000mg/Nm3Flue gas, and control treating capacity≤20000Nm of flue gas3When/h, realizes and utilize lower cost
Reach more preferably fume treatment effect.
Preferably, for can common alkalinity from the prior art to washing alkaline solution that flue gas is washed twice
It is selected in solution, it is contemplated that control cost, preferably above-mentioned first alkaline solution and the second alkaline solution are each independently
Sodium hydrate aqueous solution, aqueous sodium carbonate and/or ammonium hydroxide.Wherein effect is more prominent when using the mixing of a variety of alkaline solutions
Go out.
Further, in order to improve the utilization rate of alkaline solution, flue gas is washed preferably by the first alkaline solution
During, control the molar ratio 1 of nitrogen oxides in effluent and the first alkaline solution neutral and alkali substance：0.9~1.5；It is preferred that profit
During being washed to flue gas after oxidation with the second alkaline solution, nitrogen oxides in effluent and the second alkalinity after control oxidation
The molar ratio 1 of solution neutral and alkali substance：0.9~1.5.
In order to improve the value of the obtained saline solution of caustic wash unit, preferably above-mentioned method of denitration further includes to saline solution after absorption
It is evaporated crystallization treatment and obtains by-product salt.Further concentration is carried out to saline solution, obtains by-product salt, the by-product salt
Class runs producer as byproduct export trade, for denitrification apparatus and increases income, reduces the overall operation cost of denitrification apparatus.
Further, in order to improve the utilization rate of ozone, oxidizing and denitrating ozone processing preferably is carried out to initial wash flue gas
During, ozone is 1.6~2.5 with the nitric oxide production mass ratio in initial wash flue gas：1.
Below with reference to embodiment and comparative example, the advantageous effect of the application is further illustrated.
Embodiment 1
Denitration is carried out using out of stock device shown in FIG. 1 gold molten to wet method and/or Rong Yin workshop sections flue gas, utilizes the first alkalinity
Solution gold molten to wet method and/or Rong Yin workshop sections flue gas carry out first time washing, obtain salt after initial wash flue gas and the first absorption
Liquid；Oxidizing and denitrating ozone processing, flue gas after being aoxidized are carried out to initial wash flue gas；Using the second alkaline solution to oxidation after
Flue gas is washed, obtain can discharging flue gas and second absorb after saline solution.Wherein, cigarette is detected using online flue gas analyzer in real time
The composition of main nitrogen oxides and temperature are shown in Table 1 in gas, treatment quantity 15000Nm3/h。
Table 1
| Flue gas forms | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 2000 | 2000 | 713 | 48 |
During being washed using the first alkali washing process equipment gold molten to wet method and/or Rong Yin workshop sections flue gas, first
Alkaline solution uses 20% sodium hydrate aqueous solution, and the sprinkle density of sodium hydrate aqueous solution is 9m3/(m2﹒ h) to control wet method
Molten gold and/or the molar ratio of Rong Yin workshop sections nitrogen oxides in effluent and sodium hydroxide are 1：0.9；Initial wash flue gas is carried out smelly
During the processing of oxygen oxidation and denitration, control ozone is 1.8 with nitric oxide production weight ratio in initial wash flue gas：1；Utilize
During two alkali washing process equipment wash flue gas after oxidation, the second alkaline solution is water-soluble using 15% sodium hydroxide
Liquid, the sprinkle density for controlling sodium hydrate aqueous solution are 7.5m3/(m2﹒ h) with nitrogen oxides in effluent and hydrogen-oxygen after control washing
Change the molar ratio 1 of sodium：1.
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 2.
Table 2
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 42 | 65 | 46 | 47 |
Embodiment 2
Difference from example 1 is that during carrying out oxidizing and denitrating ozone processing to initial wash flue gas, control
Ozone processed is 1.6 with nitric oxide production weight ratio in initial wash flue gas：1.
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 3.
Table 3
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 49 | 72 | 53 | 47 |
Embodiment 3
Difference from example 1 is that during carrying out oxidizing and denitrating ozone processing to initial wash flue gas, control
Ozone processed is 2.5 with nitric oxide production weight ratio in initial wash flue gas：1.
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 4.
Table 4
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 21 | 32 | 30 | 47 |
Embodiment 4
Difference from Example 1 is, utilizes the first alkali washing process equipment gold molten to wet method and/or Rong Yin workshop sections flue gas
During being washed, the first alkaline solution uses 20% sodium hydrate aqueous solution, the sprinkle density of sodium hydrate aqueous solution
For 3m3/(m2﹒ h) to control the molten gold of wet method and/or the molar ratio of Rong Yin workshop sections nitrogen oxides in effluent and sodium hydroxide as 1：
0.3。
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 5.
Table 5
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 51 | 74 | 56 | 47 |
Embodiment 5
Difference from Example 1 is, utilizes the first alkali washing process equipment gold molten to wet method and/or Rong Yin workshop sections flue gas
During being washed, the first alkaline solution uses 20% sodium hydrate aqueous solution, the sprinkle density of sodium hydrate aqueous solution
For 10m3/(m2﹒ h) to control the molten gold of wet method and/or the molar ratio of Rong Yin workshop sections nitrogen oxides in effluent and sodium hydroxide as 1：1.
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 6.
Table 6
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 24 | 35 | 34 | 47 |
Embodiment 6
Difference from Example 1 is, the process washed to flue gas after oxidation using the second alkali washing process equipment
In, the second alkaline solution uses 15% sodium hydrate aqueous solution, and the sprinkle density for controlling sodium hydrate aqueous solution is 3m3/(m2﹒ h)
The molar ratio of nitrogen oxides in effluent and sodium hydroxide is 1 after being washed with control：0.4.
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 7.
Table 7
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 62 | 91 | 61 | 47 |
Embodiment 7
Difference from Example 1 is, the process washed to flue gas after oxidation using the second alkali washing process equipment
In, the second alkaline solution uses 15% sodium hydrate aqueous solution, and the sprinkle density for controlling sodium hydrate aqueous solution is 10m3/(m2﹒
H) molar ratio of nitrogen oxides in effluent and sodium hydroxide is 1 after being washed with control:1.4.
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 8.
Table 8
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 26 | 41 | 29 | 47 |
Embodiment 8
Difference from Example 1 is, treatment quantity 20000Nm3/h。
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 9.
Table 9
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 63 | 82 | 69 | 47 |
Embodiment 9
Difference from Example 1 is, treatment quantity 25000Nm3/h。
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 10.
Table 10
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 81 | 116 | 120 | 47 |
Embodiment 10
Difference from example 1 is that utilizing the first alkali washing process equipment gold molten to wet method and/or Rong Yin workshop sections cigarette
During gas is washed, the first alkaline solution uses 20% sodium hydrate aqueous solution, the spray of sodium hydrate aqueous solution close
Degree is 2m3/(m2﹒ h) to control the molten gold of wet method and/or the molar ratio of Rong Yin workshop sections nitrogen oxides in effluent and sodium hydroxide as 1:
0.2；During oxidizing and denitrating ozone processing being carried out to initial wash flue gas, control ozone and an oxidation in initial wash flue gas
The weight ratio of nitrogen is 1.8：1；During being washed to flue gas after oxidation using the second alkali washing process equipment, the second alkalinity is molten
Liquid uses 15% sodium hydrate aqueous solution, and the sprinkle density for controlling sodium hydrate aqueous solution is 12m3/(m2﹒ h) with control wash after
The molar ratio 1 of nitrogen oxides in effluent and sodium hydroxide:1.6.
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 11.
Table 11
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 44 | 69 | 48 | 47 |
Embodiment 11
Difference from Example 1 is, main nitrogen oxides in flue gas is detected in real time using online flue gas analyzer
Composition and temperature are shown in Table 12, treatment quantity 15000Nm3/h。
Table 12
| Flue gas forms | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 1500 | 1600 | 684 | 48 |
Detect the composition of the flue gas of detection discharge in real time using online flue gas analyzer, testing result is shown in Table 13.
Table 13
| Flue gas | NO | NO2 | HCl | Temperature/DEG C |
| Concentration (mg/Nm3) | 29 | 36 | 42 | 48 |
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
It is generally higher in view of the content of nitrogen dioxide in the molten gold of wet method and/or Rong Yin workshop sections flue gas, therefore first with the
One caustic wash unit, which to the nitrogen oxides in flue gas absorb, forms nitrate or nitrite, obtained initial wash flue gas
Nitrogen oxides in nitrogen oxides greatly reduces；Denitration process is being carried out to initial wash flue gas using oxidizing and denitrating ozone unit
When, nitric oxide more fully can carry out haptoreaction with ozone, therefore can be more efficient low by nitric oxide oxygen therein
It is melted into nitrogen dioxide, and due to the setting of the first caustic wash unit so that the nitric oxide in flue gas reaches reduction, it can be
This step reduces the consumption of ozone, reduces the operating cost of denitrification apparatus；Followed by the second caustic wash unit to cigarette after oxidation
Gas carries out second of alkali cleaning, and lye, which with the remaining nitrogen oxides in flue gas after oxidation absorb, forms nitrate or nitrous acid
Salt, and gained saline solution can be used as semi-finished product or be used as product to sell after processing, and proceeds of sale further decrease
The overall operation cost of denitrification apparatus.And treated that denitration standard, energy is fully achieved in flue gas by above-mentioned denitrification apparatus
Enough realize flue gas emission.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. the denitrification apparatus of a kind of molten gold of wet method and/or Rong Yin workshop sections flue gas, which is characterized in that the denitrification apparatus includes：
First caustic wash unit (10), saline solution exports after being absorbed with smoke inlet, initial wash exhanst gas outlet and first；
Oxidizing and denitrating ozone unit (20) has exhanst gas outlet after initial wash smoke inlet and oxidation, the initial wash cigarette
Gas entrance is connected with the initial wash exhanst gas outlet；And
Second caustic wash unit (30), saline solution outlet after being absorbed with smoke inlet, flue gas emission mouth and second after oxidation, the oxygen
Smoke inlet is connected with exhanst gas outlet after the oxidation after change.
2. denitrification apparatus according to claim 1, which is characterized in that first caustic wash unit (10) includes：
First caustic wash tower (11) has the first alkali liquor inlet, the smoke inlet, the initial wash exhanst gas outlet and described the
Saline solution exports after one absorption；
First lye supply equipment (12), is connected with first alkali liquor inlet；
It is preferred that first caustic wash unit (10) further includes the first flue gas analyzer (13), the smoke inlet and first cigarette
Qi leel analyzer (13) is connected to detect the nitrous oxides concentration in flue gas, the first lye supply equipment (12) and described first
Flue gas analyzer (13) is connected and adjusts the supply of water according to the nitrous oxides concentration.
3. denitrification apparatus according to claim 1, which is characterized in that the oxidizing and denitrating ozone unit (20) includes：
Oxidizing and denitrating ozone reactor (21) has ozone inlet and the initial wash smoke inlet；
Ozone supplied equipment (22), is connected with the ozone inlet；
It is preferred that the oxidizing and denitrating ozone unit (20) further includes the second flue gas analyzer (23), the initial wash smoke inlet
It is connected to detect the nitric oxide concentration in initial wash flue gas with second flue gas analyzer (23), the ozone supplied is set
Standby (22) are connected with second flue gas analyzer (23) and adjust the supply of the ozone according to the nitric oxide concentration.
4. denitrification apparatus according to claim 1, which is characterized in that second caustic wash unit (30) includes：
Second caustic wash tower (31) has the second alkali liquor inlet, smoke inlet after the oxidation, the flue gas emission mouth and described the
Saline solution exports after two absorptions；
Second lye supply equipment (32), is connected with the alkali liquor inlet；
It is preferred that second caustic wash unit (30) further includes third flue gas analyzer (33), after the oxidation smoke inlet with it is described
Third flue gas analyzer (33) is connected with the nitrous oxides concentration in flue gas after detection oxidation, the second lye supply equipment
(32) it is connected and is adjusted according to the nitrous oxides concentration supply of lye with the third flue gas analyzer (33).
5. denitrification apparatus according to claim 1, which is characterized in that the denitrification apparatus further includes：
Evaporator (41) there is dilute saline solution entrance and dense saline solution to export, saline solution after dilute saline solution entrance is absorbed with described first
Saline solution outlet is connected after outlet is absorbed with described second；
There is crystallizer (42) dense saline solution entrance and by-product salt to export, and the dense saline solution entrance exports phase with the dense saline solution
Even.
6. the method for denitration of a kind of molten gold of wet method and/or Rong Yin workshop sections flue gas, which is characterized in that the method for denitration includes：
First time washing is carried out to the flue gas using the first alkaline solution, obtains salt after initial wash flue gas and the first absorption
Liquid；
Oxidizing and denitrating ozone processing, flue gas after being aoxidized are carried out to the initial wash flue gas；
Flue gas after the oxidation is washed using the second alkaline solution, obtain can discharging flue gas and second absorb after saline solution.
7. method of denitration according to claim 6, which is characterized in that nitric oxide production concentration, titanium dioxide in the flue gas
The concentration of nitrogen≤2000mg/Nm3, treating capacity≤20000Nm of the flue gas3/h。
8. method of denitration according to claim 6, which is characterized in that first alkaline solution and second alkalinity are molten
Liquid is each independently sodium hydrate aqueous solution, aqueous sodium carbonate and/or ammonium hydroxide, preferably by first alkaline solution pair
During the flue gas is washed, the nitrogen oxides in effluent and the first alkaline solution neutral and alkali substance are controlled
Molar ratio 1：0.9~1.5；During being washed to flue gas after the oxidation preferably by the second alkaline solution, institute is controlled
State the molar ratio 1 of nitrogen oxides in effluent and the second alkaline solution neutral and alkali substance after aoxidizing：0.9~1.5.
9. method of denitration according to claim 6, which is characterized in that the method for denitration further includes to salt after the absorption
Liquid is evaporated crystallization treatment and obtains by-product salt.
10. method of denitration according to claim 6, which is characterized in that carry out ozone oxidation to the initial wash flue gas
During denitration process, ozone is 1.6~2.5 with the nitric oxide production mass ratio in the initial wash flue gas：1.
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| CN113289467A (en) * | 2021-06-29 | 2021-08-24 | 成都达奇环境科技有限公司 | Treatment method of flue gas produced by metal catalyst |
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| CN206837822U (en) * | 2017-06-22 | 2018-01-05 | 北京皓天百能环保工程有限公司 | A kind of pelletizing flue gas by ozone denitrating system |
| CN208626980U (en) * | 2018-05-02 | 2019-03-22 | 中国恩菲工程技术有限公司 | The denitrification apparatus of the molten gold of wet process and/or Rong Yin workshop section flue gas |
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| CN113289467A (en) * | 2021-06-29 | 2021-08-24 | 成都达奇环境科技有限公司 | Treatment method of flue gas produced by metal catalyst |
| CN113289467B (en) * | 2021-06-29 | 2022-08-26 | 成都达奇环境科技有限公司 | Treatment method of flue gas produced by metal catalyst |
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Application publication date: 20180928 |