CN106669393A - Denitration system and denitration method for fuel gas of pulverized coal industrial boiler - Google Patents
Denitration system and denitration method for fuel gas of pulverized coal industrial boiler Download PDFInfo
- Publication number
- CN106669393A CN106669393A CN201611221469.3A CN201611221469A CN106669393A CN 106669393 A CN106669393 A CN 106669393A CN 201611221469 A CN201611221469 A CN 201611221469A CN 106669393 A CN106669393 A CN 106669393A
- Authority
- CN
- China
- Prior art keywords
- denitration
- flue gas
- industrial boiler
- fine coal
- heat storage
- 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.)
- Pending
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 239000003245 coal Substances 0.000 title claims abstract description 89
- 239000002737 fuel gas Substances 0.000 title claims abstract description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 156
- 239000003546 flue gas Substances 0.000 claims abstract description 156
- 239000003638 reducing agent Substances 0.000 claims abstract description 65
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 16
- 230000003009 desulfurizing Effects 0.000 claims abstract description 16
- 238000002485 combustion reaction Methods 0.000 claims abstract description 12
- 239000002918 waste heat Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims description 75
- 238000005338 heat storage Methods 0.000 claims description 69
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitrogen oxide Substances O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 57
- 239000003054 catalyst Substances 0.000 claims description 39
- 238000009825 accumulation Methods 0.000 claims description 33
- 239000000428 dust Substances 0.000 claims description 31
- 229910052813 nitrogen oxide Inorganic materials 0.000 claims description 27
- 238000006722 reduction reaction Methods 0.000 claims description 21
- 210000003660 Reticulum Anatomy 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 16
- 238000011068 load Methods 0.000 claims description 16
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 15
- 239000000654 additive Substances 0.000 claims description 13
- 230000000996 additive Effects 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 12
- 210000003298 Dental Enamel Anatomy 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 10
- 238000000889 atomisation Methods 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000004202 carbamide Substances 0.000 claims description 8
- 229960000539 carbamide Drugs 0.000 claims description 8
- 235000013877 carbamide Nutrition 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- ICAKDTKJOYSXGC-UHFFFAOYSA-K Lanthanum(III) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 claims description 6
- 239000000969 carrier Substances 0.000 claims description 6
- NMCUIPGRVMDVDB-UHFFFAOYSA-L Iron(II) chloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims description 5
- 235000019504 cigarettes Nutrition 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- 229910003076 TiO2-Al2O3 Inorganic materials 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- UNTBPXHCXVWYOI-UHFFFAOYSA-O azanium;oxido(dioxo)vanadium Chemical compound [NH4+].[O-][V](=O)=O UNTBPXHCXVWYOI-UHFFFAOYSA-O 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 238000000975 co-precipitation Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 238000000746 purification Methods 0.000 claims description 4
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium(0) Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000080 wetting agent Substances 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N TiO Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- 230000000240 adjuvant Effects 0.000 claims description 3
- 239000002671 adjuvant Substances 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- -1 enamel Substances 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 230000001404 mediated Effects 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 238000002386 leaching Methods 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 3
- 238000004064 recycling Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 239000000203 mixture Substances 0.000 description 11
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 7
- 238000007254 oxidation reaction Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000010410 dusting Methods 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K Aluminium chloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 2
- 239000003830 anthracite Substances 0.000 description 2
- 239000002802 bituminous coal Substances 0.000 description 2
- 230000003197 catalytic Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 235000006408 oxalic acid Nutrition 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 150000004763 sulfides Chemical class 0.000 description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K Aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K Iron(III) chloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N Potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J Titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- NWJUARNXABNMDW-UHFFFAOYSA-N [W]=[V] Chemical compound [W]=[V] NWJUARNXABNMDW-UHFFFAOYSA-N 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000001994 activation Methods 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000011020 pilot scale process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000576 supplementary Effects 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 229910000349 titanium oxysulfate Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur 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
- B01D53/46—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
- B01D53/74—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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/888—Tungsten
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
Abstract
The invention discloses a denitration system and a denitration method for fuel gas of a pulverized coal industrial boiler. The denitration system comprises the pulverized coal industrial boiler, a cyclone separation device, a denitration heat accumulator, a desulfurization device and a chimney, wherein a reducing agent nozzle is formed in the side wall of a combustion chamber of the pulverized coal industrial boiler; the reducing agent nozzle is suitable for spraying a reducing agent into the combustion chamber, mixing the reducing agent and the flue gas of the pulverized coal industrial boiler in the combustion chamber and carrying out pre-denitration treatment; the cyclone separation device is connected with a flue gas outlet of the pulverized coal industrial boiler; the denitration heat accumulator is connected with the cyclone separation device; the denitration heat accumulator is suitable for recycling waste heat of the flue gas and carrying out denitration treatment of the flue gas; the desulfurization device is connected with the denitration heat accumulator; the chimney is connected with the desulfurization device. By utilizing the denitration system disclosed by the invention, the denitration treatment can be effectively carried out on the flue gas of the pulverized coal industrial boiler, and the denitration efficiency is remarkable.
Description
Technical field
The invention belongs to denitrating flue gas field, specifically, the present invention relates to fine coal Industrial Boiler flue gas denitrification system and
Method of denitration.
Background technology
With developing rapidly for China's economy, the Fossil fuel equal energy source such as natural gas, oil and coal obtains more extensive
Using so that environmental problem is increasingly serious, therefore causes series of environmental problems, such as acid rain, depletion of the ozone layer, greenhouse effect
Deng so that our living environment is further severe.Energy resource structure of the China based on coal determine China nitrogen oxides and
Sulfur oxide emission is constantly in high situation, the discharge of a large amount of pollution gas so that environmental problem is increasingly tight
It is high, the productive life of our people is not only had a strong impact on, and it is unfavorable for the sustainable development of China's economy.Therefore, environment is asked
Topic has obtained national increasing concern.
The NO of mankind's activity dischargeXMore than 90% from fuel combustion process.It is various industrial furnaces, Civil energy-saving cooking stove, motor-driven
During high temp. combustion of fuel in car and other internal combustion engines, the nitrogen substance oxidation in fuel generates NOX, participate in burning air or
N in oxygen-enriched air2And O2Also NO can be generatedX.From the point of view of energy resource structure, in the primary energy of China and power generation energy resource composition, coal
Occupy absolute leading position.And the coal of China more than 80% is directly burning, particularly for power station, Industrial Boiler
And in civil boiler.Therefore, in considerably long period, the NO in flue gasXDischarge is to cause China air NOXOne master of pollution
Factor is wanted, the NO of fixed source emission how is reducedXIt is an important topic of atmospheric environment improvement.
Denitrating flue gas belong to burning post-processing technology, and the smoke evacuation system of many developed countries all needs to install denitrating flue gas dress
Put.Denitration method for flue gas is more, but obtains the only selective catalytic reduction of a large amount of commercial Applications at present and selectivity is non-urges
Change reducing process, additive method is at present experimentation stage or pilot scale stage.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this purpose, the present invention
One purpose is to propose fine coal Industrial Boiler flue gas denitrification system and method for denitration, using the denitrating system and method for denitration
Using the denitration heat storage for having accumulation of heat and denitration function concurrently, surface is smooth, wear-resisting, and simple process is feasible, and flue gas is without the need for dedusting
Denitration reaction can be carried out, simple to operate, denitration efficiency is high.
According to an aspect of the present invention, the present invention proposes fine coal Industrial Boiler flue gas denitrification system, including：
Fine coal Industrial Boiler, is provided with reductant nozzle, the reducing agent on the burner hearth sidewall of the fine coal Industrial Boiler
Nozzle is suitable to spray into reducing agent into the burner hearth, the reducing agent is mixed in the burner hearth with fine coal Industrial Boiler flue gas
And carry out pre- denitration process；
Cyclone separator, the cyclone separator is connected with the exhanst gas outlet of the fine coal Industrial Boiler, the rotation
Wind segregation apparatuss are suitable to carry out dust removal process to flue gas；
Denitration heat storage, the denitration heat storage is connected with the cyclone separator, and the denitration heat storage is suitable to back
Receive fume afterheat and denitration process are carried out to flue gas；
Desulfurizer, the desulfurizer is connected with the denitration heat storage, and the desulfurizer is suitable to remove in flue gas
Oxysulfide；And
Chimney, the chimney is connected with the desulfurizer.
Thus, using the fine coal Industrial Boiler flue gas denitrification system of above-described embodiment, reductant nozzle is arranged on into burner hearth
On the wall of side, and then flue gas is mixed with reducing agent in burner hearth carry out pre- denitration process, the flue gas Jing after pre- denitration process
Crossing dust removal process and carrying out reduction reaction again in denitration accumulation of heat body carries out denitration process and recovery waste heat, finally carries out at desulfurization
Reason.The system carries out pre- denitration process, such that it is able to the nitrogen oxidation in partial removal flue gas using high temperature in burner hearth to flue gas
Thing, mitigates the pressure of follow-up out of stock device, reduces the consumption of out of stock catalyst, reduces out-of-stock cost.
In addition, fine coal Industrial Boiler flue gas denitrification system according to the above embodiment of the present invention can also have following adding
Technical characteristic：
In some embodiments of the invention, the denitration heat storage is spherical, strip, cylindrical shape or honeycomb ceramics shape.
In some embodiments of the invention, the through hole on the denitration heat storage is square, the square dimensions
For (3-10mm) × (3-10mm), the wall thickness of the through hole is 0.5-2mm, and the specific surface area of the denitration heat storage is more than 500.
In some embodiments of the invention, the reductant nozzle is atomizer.
In some embodiments of the invention, the atomizer is ammonia atomization nozzle or carbamide atomizer.
In some embodiments of the invention, the denitration heat storage has fuel gas entrance and the outlet of hot fuel gas, institute
State hot fuel gas outlet to be connected with the fuel inlet of the fine coal Industrial Boiler.
According to the second aspect of the invention, the invention allows for using the fine coal Industrial Boiler cigarette described in preceding embodiment
The method that gas denitrating system processes fine coal Industrial Boiler flue gas, including：
Reducing agent is sprayed into into the burner hearth of fine coal Industrial Boiler by reductant nozzle, the reducing agent is made with fine coal industry
Boiler smoke mixes and carries out pre- denitration process in the burner hearth；
The mixed flue gas discharged from fine coal Industrial Boiler are made to enter cyclone separator, to remove to mixed flue gas
Dirt process；
Make through the dust removal process mixed flue gas enter denitration heat storage, so as to denitration heat storage carry out accumulation of heat and
There are reduction reaction removing nitrogen oxides in the presence of catalyst；
Make the flue gas of removing nitrogen oxides carries out desulfurization process into desulfurizer, to be purified rear flue gas；
Flue gas after the purification is discharged by chimney.
Thus, using the fine coal Industrial Boiler denitration method for flue gas of above-described embodiment, reductant nozzle is arranged on into burner hearth
On the wall of side, and then flue gas is mixed with reducing agent in burner hearth carry out pre- denitration process, the flue gas Jing after pre- denitration process
Crossing dust removal process and carrying out reduction reaction again in denitration accumulation of heat body carries out denitration process and recovery waste heat, finally carries out at desulfurization
Reason.The system carries out pre- denitration process, such that it is able to the nitrogen oxidation in partial removal flue gas using high temperature in burner hearth to flue gas
Thing, mitigates the pressure of follow-up out of stock device, reduces the consumption of out of stock catalyst, reduces out-of-stock cost.
In addition, fine coal Industrial Boiler denitration method for flue gas according to the above embodiment of the present invention can also have following adding
Technical characteristic：
In some embodiments of the invention, the method for denitration of above-described embodiment further includes, will be using denitration accumulation of heat
Body is preheated to oxygen-containing gas, and is used for fine coal Industrial Boiler using the oxygen-containing gas after preheating as combustion adjuvant, after preheating
The temperature of oxygen-containing gas is 250-450 degree Celsius.
In some embodiments of the invention, the temperature that the mixed flue gas occur reduction reaction is 300-500 degree Celsius.
In some embodiments of the invention, the denitration heat storage includes inorganic powder, denitrating catalyst and additive,
Wherein, the load capacity of the inorganic powder is 50-100 mass %, and the load capacity of the denitrating catalyst is 5-40 mass %, institute
The load capacity for stating additive is 1-10 mass %, and in the additive enamel is contained.
In some embodiments of the invention, the denitration heat storage is prepared through the following steps：
(1) inorganic powder, ceramic powders, enamel, binding agent, plasticising wetting agent, lubricant and water are mixed, are mediated
And roasting, to obtain honeycomb heat accumulation body；
(2) TiO is prepared by coprecipitation2-Al2O3Composite oxides, and by the TiO2-Al2O3Combined oxidation
Thing is mixed with activated carbon, obtains denitration catalyst carrier solution；
(3) obtain the denitration containing tungsten, vanadium, ferrum, lanthanum and urge using ammonium metatungstate, ammonium metavanadate, iron chloride, lanthanum chloride preparation
Agent active component solution；
(4) honeycomb heat accumulation body is carried out in denitration catalyst carrier solution the first impregnation process, drying and roasting；
(5) honeycomb heat accumulation body after step (4) process is carried out into the in the denitrating catalyst active component solution
Two dippings, dry and roasting, to obtain the denitration heat storage.
Description of the drawings
Fig. 1 is the structural representation of fine coal Industrial Boiler flue gas denitrification system according to an embodiment of the invention.
Fig. 2 is the flow chart of fine coal Industrial Boiler denitration method for flue gas according to an embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
According to an aspect of the present invention, the present invention proposes fine coal Industrial Boiler flue gas denitrification system, below with reference to Fig. 1
The fine coal Industrial Boiler flue gas denitrification system of the description embodiment of the present invention, including：Fine coal Industrial Boiler 100, cyclone separator
200th, denitration heat storage 300, desulfurizer 400 and chimney 500.
Wherein, reductant nozzle 110 is provided with the burner hearth sidewall of fine coal Industrial Boiler 100, reductant nozzle 110 is suitable to
Reducing agent is sprayed into into burner hearth 120, makes reducing agent mix and carry out pre- denitration process in burner hearth with fine coal Industrial Boiler flue gas；
Cyclone separator 200 is connected with the exhanst gas outlet 120 of fine coal Industrial Boiler 100, and cyclone separator 200 is suitable to enter flue gas
Row dust removal process；Denitration heat storage 300 is connected with cyclone separator 200, the body of denitration accumulation of heat 300 be suitable to Mist heat recovering and
Denitration process are carried out to flue gas；Desulfurizer 400 is connected with denitration heat storage 300, and desulfurizer 400 is suitable to remove in flue gas
Oxysulfide；And chimney 500 is connected with desulfurizer 400.
Thus, using the fine coal Industrial Boiler flue gas denitrification system of above-described embodiment, reductant nozzle is arranged on into burner hearth
On the wall of side, and then flue gas is mixed with reducing agent in burner hearth carry out pre- denitration process, the flue gas Jing after pre- denitration process
Crossing dust removal process and carrying out reduction reaction again in denitration accumulation of heat body carries out denitration process and recovery waste heat, finally carries out at desulfurization
Reason.The system carries out pre- denitration process, such that it is able to the nitrogen oxidation in partial removal flue gas using high temperature in burner hearth to flue gas
Thing, mitigates the pressure of follow-up out of stock device, reduces the consumption of out of stock catalyst, reduces out-of-stock cost.
The fine coal Industrial Boiler flue gas denitrification system of the specific embodiment of the invention is described below in detail.
Fine coal Industrial Boiler 100
Embodiments in accordance with the present invention, are provided with reductant nozzle 110 on the burner hearth sidewall of fine coal Industrial Boiler 100, also
Former agent nozzle 110 is suitable to spray into reducing agent into burner hearth 120, reducing agent is mixed simultaneously in burner hearth with fine coal Industrial Boiler flue gas
Carry out pre- denitration process.Thus, reducing agent is sprayed into into the burner hearth of fine coal Industrial Boiler by reductant nozzle, make reducing agent with
Fine coal Industrial Boiler flue gas mixes and carries out pre- denitration process in burner hearth.
Embodiments in accordance with the present invention, reductant nozzle is arranged on burner hearth, and reducing agent can Quick-gasifying or decomposition after spraying
Into gaseous ammonia, and mix with high-temperature flue gas rapidly, and the nitrogen oxides and reducing agent in the presence of high temperature in burner hearth, in flue gas
Generation reduction reaction, by the part removal of nitrogen oxide in flue gas, can mitigate the out of stock pressure of follow-up out of stock device, reduce out of stock
The consumption of catalyst, reduces operating cost.
According to a particular embodiment of the invention, reductant nozzle is atomizer.Thus effervescent atomization technology is adopted, is used
High pressure air or oxygen-enriched air make the moment atomization that reducing agent sprays be little droplet as atomizing medium, and droplet granule can
Less than 40 μm are reached, can be good at mixing homogeneously with flue gas.
According to a particular embodiment of the invention, atomizer can be ammonia atomization nozzle or carbamide atomizer.By
This sprays into ammonia or carbamide into burner hearth 120 as reducing agent.Reducing agent is set to mix in burner hearth with fine coal Industrial Boiler flue gas
And pre- denitration process are carried out, so as to improve overall denitration efficiency.
Cyclone separator 200
Embodiments in accordance with the present invention, cyclone separator 200 is connected with the exhanst gas outlet 120 of fine coal Industrial Boiler 100,
Cyclone separator 200 is suitable to carry out dust removal process to flue gas.Thus, enter the mixed flue gas discharged from fine coal Industrial Boiler
Enter cyclone separator, to carry out dust removal process to mixed flue gas.
Embodiments in accordance with the present invention, it can be anthracite, jet coal, bituminous coal, brown coal that fine coal Industrial Boiler is raw materials used
Deng one or more, Task-size Controlling is between 50~500 μm.Therefore, can be adjoint while pulverized coal friring produces high-temperature flue gas
There is substantial amounts of dust to produce, and as flue gas is discharged.By being carried out at dedusting to flue gas using cyclone separator 200 in advance
Reason, can further improve the denitration process efficiency of follow-up denitrification apparatus.
Denitration heat storage 300
Embodiments in accordance with the present invention, denitration heat storage 300 be connected with cyclone separator 200 and be suitable to recovered flue gas more than
Heat and denitration process are carried out to flue gas.Thus, the mixed flue gas through dust removal process are made to enter denitration heat storage, so as in denitration
Make mixed flue gas that reduction reaction removing nitrogen oxides occur in accumulation of heat body in the presence of catalyst.
Embodiments in accordance with the present invention, denitration heat storage is spherical, strip, cylindrical shape or honeycomb ceramics shape.
Embodiments in accordance with the present invention, the through hole on denitration heat storage is square, and the square dimensions are (3-
10mm) × (3-10mm), the wall thickness of the through hole is 0.5-2mm, and the specific surface area of the denitration heat storage is more than 500.
Embodiments in accordance with the present invention, denitration heat storage includes inorganic powder, denitrating catalyst and additive, wherein, institute
The load capacity for stating inorganic powder is 50-100 mass %, and the load capacity of the denitrating catalyst is 5-40 mass %, the addition
The load capacity of agent is 1-10 mass %, and in the additive enamel is contained.
According to a particular embodiment of the invention, the high-temperature flue gas that burning is produced and the reductant nozzle spray being arranged on burner hearth
The reducing agent hybrid concurrency for going out is survived after former reactive moieties removing nitrogen oxides, from fine coal industrial boiler furnace out, Jing convection current
After tube bank, flue-gas temperature enters denitration heat storage Jing after cyclone separator rough dusting after being reduced to 300-600 DEG C.In denitration
In the presence of denitrating catalyst in accumulation of heat body, there is reduction reaction in the nitrogen oxides in flue gas with ammonia, remove nitrogen oxides,
Removal efficiency is up to more than 98%, while flue gas carries out accumulation of heat in denitration accumulation of heat body.Cigarette after denitration enters flue gas desulfurization system
System, after removing the sulfide in flue gas, is externally discharged by chimney.According to a particular embodiment of the invention, flue gas stores in denitration
The hot temperature that reduction reaction occurs in vivo is 300-500 degree Celsius.It is possible thereby to further improve catalytic denitration reaction, nitrogen is improved
Oxide removal rate.
Desulfurizer 400 and chimney 500
Embodiments in accordance with the present invention, desulfurizer 400 is connected with denitration heat storage 300, and desulfurizer 500 is suitable to remove
Oxysulfide in flue gas；And chimney 500 is connected with desulfurizer 400.Thus, enter the flue gas after dust removal process
Desulfurizer carries out desulfurization process, to be purified rear flue gas, flue gas after purification is discharged by chimney.
According to the second aspect of the invention, the present invention proposes fine coal Industrial Boiler denitration method for flue gas, and the method is utilized
The fine coal Industrial Boiler flue gas denitrification system of preceding embodiment is carried out.
Included according to the fine coal Industrial Boiler denitration method for flue gas of the specific embodiment of the invention：By reductant nozzle to powder
Reducing agent is sprayed in the burner hearth of coal Industrial Boiler, the reducing agent is mixed simultaneously in the burner hearth with fine coal Industrial Boiler flue gas
Carry out pre- denitration process；The mixed flue gas discharged from fine coal Industrial Boiler are made to enter cyclone separator, so as to mixing cigarette
Gas carries out dust removal process；The mixed flue gas through the dust removal process are made to enter denitration heat storage, to enter in denitration heat storage
Row accumulation of heat and in the presence of catalyst occur reduction reaction removing nitrogen oxides；The flue gas for making removing nitrogen oxides enters desulfurization
Device carries out desulfurization process, to be purified rear flue gas；Flue gas after the purification is discharged by chimney.
Thus, using the fine coal Industrial Boiler denitration method for flue gas of above-described embodiment, reductant nozzle is arranged on into burner hearth
On the wall of side, and then flue gas is mixed with reducing agent in burner hearth carry out pre- denitration process, the flue gas Jing after pre- denitration process
Crossing dust removal process and carrying out reduction reaction again in denitration accumulation of heat body carries out denitration process simultaneously Mist heat recovering, finally carries out
Desulfurization process.The system carries out pre- denitration process, such that it is able to the nitrogen in partial removal flue gas using high temperature in burner hearth to flue gas
Oxide, mitigates the pressure of follow-up out of stock device, reduces the consumption of out of stock catalyst, reduces out-of-stock cost.
The fine coal Industrial Boiler denitration method for flue gas of the specific embodiment of the invention is described in detail below with reference to Fig. 2.
S100：Pre- denitration process in burner hearth
Embodiments in accordance with the present invention, reducing agent is sprayed into by reductant nozzle into the burner hearth of fine coal Industrial Boiler, is made
Reducing agent mixes and carries out pre- denitration process with fine coal Industrial Boiler flue gas in burner hearth.
Embodiments in accordance with the present invention, reductant nozzle is arranged on burner hearth, and reducing agent can Quick-gasifying or decomposition after spraying
Into gaseous ammonia, and mix with high-temperature flue gas rapidly, and the nitrogen oxides and reducing agent in the presence of high temperature in burner hearth, in flue gas
Generation reduction reaction, by the part removal of nitrogen oxide in flue gas, can mitigate the out of stock pressure of follow-up out of stock device, reduce out of stock
The consumption of catalyst, reduces operating cost.
According to a particular embodiment of the invention, reductant nozzle is atomizer.Thus effervescent atomization technology is adopted, is used
High pressure air or oxygen-enriched air make the moment atomization that reducing agent sprays be little droplet as atomizing medium, and droplet granule can
Less than 40 μm are reached, can be good at mixing homogeneously with flue gas.
According to a particular embodiment of the invention, atomizer can be ammonia atomization nozzle or carbamide atomizer.By
This sprays into ammonia or carbamide into burner hearth 120 as reducing agent.Reducing agent is set to mix in burner hearth with fine coal Industrial Boiler flue gas
And pre- denitration process are carried out, so as to improve overall denitration efficiency.
S200：Dust removal process
Embodiments in accordance with the present invention, make the mixed flue gas discharged from fine coal Industrial Boiler enter cyclone separator,
To carry out dust removal process to mixed flue gas.
Embodiments in accordance with the present invention, it can be anthracite, jet coal, bituminous coal, brown coal that fine coal Industrial Boiler is raw materials used
Deng one or more, Task-size Controlling is between 50~500 μm.Therefore, can be adjoint while pulverized coal friring produces high-temperature flue gas
There is substantial amounts of dust to produce, and as flue gas is discharged.Dust removal process is carried out to flue gas using cyclone separator by advance, can
Further to improve the denitration process efficiency of follow-up denitrification apparatus.
S300：Reduction reaction removes nitrogen oxides
Embodiments in accordance with the present invention, make through the dust removal process mixed flue gas enter denitration heat storage, so as to
Denitration heat storage carries out accumulation of heat and reduction reaction removing nitrogen oxides occurs in the presence of catalyst.
Embodiments in accordance with the present invention, denitration heat storage is spherical, strip, cylindrical shape or honeycomb ceramics shape.
Embodiments in accordance with the present invention, the through hole on denitration heat storage is square, and the square dimensions are (3-
10mm) × (3-10mm), the wall thickness of the through hole is 0.5-2mm, and the specific surface area of the denitration heat storage is more than 500.
Embodiments in accordance with the present invention, denitration heat storage includes inorganic powder, denitrating catalyst and additive, wherein, institute
The load capacity for stating inorganic powder is 50-100 mass %, and the load capacity of the denitrating catalyst is 5-40 mass %, the addition
The load capacity of agent is 1-10 mass %, and in the additive enamel is contained.Denitration heat storage is carried on catalyst on heat storage,
It is allowed to have the function of accumulation of heat and denitration concurrently, is acted on by the accumulation of heat of denitration heat storage, be arranged as needed, denitration can be made
Catalyst stabilization in accumulation of heat body carries out denitration reaction in the range of optimal temperature, and denitration efficiency is high.
According to a particular embodiment of the invention, the high-temperature flue gas that burning is produced and the reductant nozzle spray being arranged on burner hearth
The reducing agent hybrid concurrency for going out is survived after former reactive moieties removing nitrogen oxides, from pulverized coal boiler burner hearth out, Jing convection banks
Afterwards, Jing after cyclone separator rough dusting into denitration heat storage after flue-gas temperature is reduced to 300-600 DEG C.In denitration accumulation of heat
Have in vivo in the presence of denitrating catalyst, the nitrogen oxides in flue gas occur reduction reaction with ammonia, remove nitrogen oxides, take off
Except efficiency is up to more than 98%, while flue gas carries out accumulation of heat in denitration accumulation of heat body.Cigarette after denitration enters flue gas desulphurization system,
After sulfide in removing flue gas, externally discharged by chimney.According to a particular embodiment of the invention, flue gas is in denitration heat storage
The interior temperature that reduction reaction occurs is 300-500 degree Celsius.It is possible thereby to further improve catalytic denitration reaction, nitrogen oxidation is improved
Thing removal efficiency.
Embodiments in accordance with the present invention, denitration heat storage is prepared through the following steps：
(1) inorganic powder, ceramic powders, enamel, binding agent, plasticising wetting agent, lubricant and water are mixed, are mediated
And roasting, to obtain honeycomb heat accumulation body；
(2) TiO is prepared by coprecipitation2-Al2O3Composite oxides, and by the TiO2-Al2O3Combined oxidation
Thing is mixed with activated carbon, obtains denitration catalyst carrier solution；
(3) obtain the denitration containing tungsten, vanadium, ferrum, lanthanum and urge using ammonium metatungstate, ammonium metavanadate, iron chloride, lanthanum chloride preparation
Agent active component solution；
(4) honeycomb heat accumulation body is carried out in denitration catalyst carrier solution the first impregnation process, drying and roasting；
(5) honeycomb heat accumulation body after step (4) process is carried out into the in the denitrating catalyst active component solution
Two dippings, dry and roasting, to obtain the denitration heat storage.
According to a particular embodiment of the invention, the preparation method of denitration heat storage is specifically included：
(1) refining of heat storage idiosome
By appropriate inorganic powder, ceramic powders, binding agent, plasticising wetting agent, mix lubricant, and add appropriate going
Ionized water carries out kneading refining, obtains pug standby.
Clod is carried out it is old, old ambient temperature be 15~25 DEG C, the old time be 24h~48h, Jing vacuum refinings,
Vacuum is extruded into the green honeycomb of required specification.
Again green honeycomb is re-fed in drying machine sizing, is dried, fire under the conditions of 1200 DEG C~1400 DEG C into
Product.
(2)TiO2-Al2O3The preparation of composite oxides
A certain amount of titanyl sulfate and aluminum chloride are taken, in being dissolved separately in appropriate deionized water, is stirred, made respectively
Titanium source and silicon source solution are obtained, the ratio of both concentration is 1：(0.01~2).By titanium source solution, silicon source solution, ammonia by cocurrent
Mode, is instilled in the reactor equipped with a small amount of deionized water by certain flow rate, is provided with agitating device in the reactor, it is ensured that solution
Mix homogeneously, reaction are abundant.Titanium source solution is identical with silicon source solution instillation speed, the instillation speed of ammonia is controlled, by reactant liquor
PH value control between 9~11, co-precipitation obtains the precipitation mixture of titanium hydroxide and aluminium hydroxide.
Activated carbon is mixed with precipitation mixture obtained above, and adds deionized water to adjust the pH value of mixture, will
PH value is controlled 9 or so.
(3) configuration of mixed liquor
A certain amount of ammonium metatungstate, ammonium metavanadate reagent are dissolved in appropriate oxalic acid, the addition of oxalic acid, control is adjusted
Between 5~7, the mol ratio of vanadium tungsten is 1 to solution pH value processed in solution：(0.1~5).
By a certain amount of iron chloride (FeCl3), lanthanum chloride (LaCl3) it is dissolved in appropriate deionized water, obtain iron chloride
With the mixed solution of lanthanum chloride.The solution is mixed with solution obtained above, the mixed solution of tungstenic, vanadium, ferrum, lanthanum is obtained.
(4) main active component load
Acid-wash activation process is carried out after the honeycomb wares deionized water obtained in step (1) is cleaned, cleaning is drained
The precipitation mixture obtained in step (2), 35~60 DEG C of dipping temperature, after 8~15h of dip time, by honeycomb ceramics are impregnated in afterwards
Take out and blow off the remnants in its hole, after being then dried 8~15h under the conditions of 85~115 DEG C, under the conditions of 350~750 DEG C
Weigh after 5~8h of roasting.It is repeated several times, until weight is not further added by.
(5) Supplementary active compounds and auxiliary agent are loaded
In the solid immersion mixed solution that therewith isopyknic step (3) obtains that step (4) is obtained, dipping temperature 15
~30 DEG C, after 8~15h of dip time, after being dried 8~15h under the conditions of 85~115 DEG C, the roasting 5 under the conditions of 350~600 DEG C
Final product is obtained after~8h.
In the denitration scheme of the present invention, a large amount of dust, Jing whirlwind are contained from fine coal Industrial Boiler high-temperature flue gas out
Dust arrester is removed after most of dust, and into denitration heat storage denitration reaction and accumulation of heat are carried out.The denitration that the present invention is adopted stores
Through hole on hot body is square, and the square dimensions are (3-10mm) × (3-10mm), and the wall thickness of the through hole is 0.5-
2mm, the specific surface area of the denitration heat storage is more than 500.Due to from fine coal Industrial Boiler high-temperature flue gas out containing big
Amount dust, although eliminate most of dust through cyclone dust collector, but also contain a certain amount of dust in flue gas, therefore,
The aperture that the denitration accumulation of heat honeycomb ceramics selected herein is used can not be too little.But the present invention uses the denitration storage for being added with enamel
Hot body, its surface is smooth, wear-resisting, with good anti-clogging, just can be reached well from the denitration heat storage of above-mentioned size
Denitration effect.
S400：Fume afterheat is utilized
Embodiments in accordance with the present invention, make the mixed flue gas through dust removal process enter denitration heat storage, and flue gas is being entered
The recovery of fume afterheat is realized while row denitration process.
Embodiments in accordance with the present invention, above-mentioned method of denitration further includes, will be using denitration heat storage to oxygen-containing gas
Preheated, and be used for fine coal Industrial Boiler, the temperature of the oxygen-containing gas after preheating using the oxygen-containing gas after preheating as combustion adjuvant
Spend for 250-450 degree Celsius.Thus the high-temperature flue gas waste heat for making full use of burning to produce, energy-efficient, energy utilization rate is high.
S500：Desulfurization process
Embodiments in accordance with the present invention, make the flue gas of removing nitrogen oxides carries out desulfurization process into desulfurizer, so as to
It is purified rear flue gas；Flue gas is discharged by chimney after purifying.
Embodiments in accordance with the present invention, the fine coal Industrial Boiler flue gas denitrification system of the above embodiment of the present invention and denitration side
Method at least has one of following advantages：
(1) using the denitration heat storage containing enamel, catalyst surface is smooth, wear-resisting, and denitrating technique is simple and feasible, operation letter
Single, denitration efficiency is high.
(2) flue gas that burning is produced temperature Jing after convection bank is reduced to 300-500 DEG C, is taken off into denitration heat storage
After nitre process, then abundant recovery waste heat is externally discharged Jing after desulfurization by chimney, reduces exhaust gas temperature, reduces smoke evacuation
Loss, reduces nitrogen oxide emission, energy-efficient, environmental protection.
(3) burning is participated in after air/oxygen-enriched air is heated to 150~300 DEG C by denitration heat storage, combustion is made full use of
The high-temperature flue gas waste heat for producing is burnt, energy-efficient, energy utilization rate is high.
(4) reductant nozzle is arranged on into burner hearth, under high temperature action of the reducing agent in burner hearth, the high temperature produced with burning
There is reduction reaction in the nitrogen oxides in flue gas, can mitigate follow-up out of stock device with the nitrogen oxides in partial removal flue gas
Pressure, reduces the consumption of out of stock catalyst, reduces out-of-stock cost.
Embodiment
Less than 100 μm of jet coal will be crushed to spray in boiler furnace by nozzle, with by aerator burner hearth is sent into
Burnt after interior air mixing, temperature is up to more than 1050 DEG C in burner hearth.It is arranged at the atomization reductant nozzle spray of burner hearth
Go out carbamide droplet, in the presence of high temperature in burner hearth, carbamide fast decoupled goes out ammonia, the nitrogen in the high-temperature flue gas that ammonia is produced with burning
There is reduction reaction, the configured convection tube in burner hearth smoke outlet of high-temperature flue gas of partial removal nitrogen oxides in oxide
Beam, flue-gas temperature enters denitration accumulation of heat integral system Jing after cyclone dust collector rough dusting after being reduced to 250-350 DEG C.Temperature
Degree is reduced to less than 200 DEG C of flue gas and denitrating system is entered Jing after cyclone dust collector rough dusting.In the work of out of stock catalyst
With under, there is reduction reaction in the nitrogen oxides in flue gas, further remove nitrogen oxides with ammonia, and removal efficiency is up to 98%.
Simultaneously the heat of flue gas passes to combustion air by denitration heat storage.Subsequently into flue gas desulphurization system, the sulfur in flue gas is removed
After compound, externally discharged by chimney.
The air for sending into burner hearth above by aerator sends into burner hearth after denitration heat storage is preheated to 250-450 DEG C
Burnt after mixing with fine coal, efficiency of combustion can be effectively improved, saved raw material dosage, cut operating costs.
The concrete proportioning of the denitration heat storage is as follows：On the basis of heat storage total quality, the mass loading of inorganic powder
Measure as 60%, the mass loading amount of denitrating catalyst is 25%, the mass loading amount of additive (including enamel) is 15%.Its
In, the active component activated carbon of denitrating catalyst accounts for 20%, V of catalyst weight2O5-WO3The 18% of catalyst weight is accounted for, is added
Plus agent enamel accounts for the 55% of weight of additive.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be arbitrary
Combine in an appropriate manner in individual or multiple embodiments or example.Additionally, in the case of not conflicting, the technology of this area
Personnel can be combined the feature of the different embodiments or example described in this specification and different embodiments or example
And combination.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. a kind of fine coal Industrial Boiler flue gas denitrification system, it is characterised in that include：
Fine coal Industrial Boiler, is provided with reductant nozzle, the reductant nozzle on the burner hearth sidewall of the fine coal Industrial Boiler
It is suitable to spray into reducing agent into the burner hearth, the reducing agent is mixed in the burner hearth with fine coal Industrial Boiler flue gas and go forward side by side
The pre- denitration process of row；
Cyclone separator, the cyclone separator is connected with the exhanst gas outlet of the fine coal Industrial Boiler, the whirlwind point
It is suitable to carry out dust removal process to flue gas from device；
Denitration heat storage, the denitration heat storage is connected with the cyclone separator, and the denitration heat storage is suitable to reclaim cigarette
Gas waste heat and denitration process are carried out to flue gas；
Desulfurizer, the desulfurizer is connected with the denitration heat storage, and the desulfurizer is suitable to remove the sulfur in flue gas
Oxide；And
Chimney, the chimney is connected with the desulfurizer.
2. fine coal Industrial Boiler flue gas denitrification system according to claim 1, it is characterised in that the denitration heat storage is
Spherical, strip, cylindrical shape or honeycomb ceramics shape.
3. fine coal Industrial Boiler flue gas denitrification system according to claim 2, it is characterised in that on the denitration heat storage
Through hole it is square, the square dimensions are (3-10mm) × (3-10mm), and the wall thickness of the through hole is 0.5-2mm, institute
The specific surface area for stating denitration heat storage is more than 500.
4. fine coal Industrial Boiler flue gas denitrification system according to claim 1, it is characterised in that the reductant nozzle is
Atomizer,
Optionally, the atomizer is ammonia atomization nozzle or carbamide atomizer.
5. fine coal Industrial Boiler flue gas denitrification system according to claim 1, it is characterised in that the denitration heat storage tool
There are fuel gas entrance and the outlet of hot fuel gas, the hot fuel gas outlet is connected with the fuel inlet of the fine coal Industrial Boiler.
6. the method that the fine coal Industrial Boiler flue gas denitrification system described in a kind of any one of utilization claim 1-5 processes flue gas,
Including：
Reducing agent is sprayed into into the burner hearth of fine coal Industrial Boiler by reductant nozzle, the reducing agent and fine coal Industrial Boiler is made
Flue gas mixes and carries out pre- denitration process in the burner hearth；
The mixed flue gas discharged from fine coal Industrial Boiler are made to enter cyclone separator, to carry out at dedusting to mixed flue gas
Reason；
The mixed flue gas through the dust removal process are made to enter denitration heat storage, to carry out accumulation of heat in denitration heat storage and to urge
There are reduction reaction removing nitrogen oxides in the presence of agent；
Make the flue gas of removing nitrogen oxides carries out desulfurization process into desulfurizer, to be purified rear flue gas；
Flue gas after the purification is discharged by chimney.
7. method according to claim 6, it is characterised in that further include, will be using denitration heat storage to oxygenous
Body is preheated, and is used for fine coal Industrial Boiler using the oxygen-containing gas after preheating as combustion adjuvant, the oxygen-containing gas after preheating
Temperature is 250-450 degree Celsius.
8. method according to claim 6, it is characterised in that it is 300- that the mixed flue gas occur the temperature of reduction reaction
500 degrees Celsius.
9. method according to claim 6, it is characterised in that the denitration heat storage includes inorganic powder, denitration catalyst
Agent and additive, wherein, the load capacity of the inorganic powder is 50-100 mass %, and the load capacity of the denitrating catalyst is 5-
40 mass %, the load capacity of the additive is 1-10 mass %, and in the additive enamel is contained.
10. method according to claim 9, it is characterised in that the denitration heat storage is prepared through the following steps：
(1) inorganic powder, ceramic powders, enamel, binding agent, plasticising wetting agent, lubricant and water are mixed, mediated and is roasted
Burn, to obtain honeycomb heat accumulation body；
(2) TiO is prepared by coprecipitation2-Al2O3Composite oxides, and by the TiO2-Al2O3Composite oxides with
Activated carbon is mixed, and obtains denitration catalyst carrier solution；
(3) using ammonium metatungstate, ammonium metavanadate, iron chloride, lanthanum chloride prepare obtain containing tungsten, vanadium, ferrum, lanthanum denitrating catalyst
Active component solution；
(4) honeycomb heat accumulation body is carried out in denitration catalyst carrier solution the first impregnation process, drying and roasting；
(5) honeycomb heat accumulation body after step (4) process is carried out into the second leaching in the denitrating catalyst active component solution
Stain, drying and roasting, to obtain the denitration heat storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611221469.3A CN106669393A (en) | 2016-12-26 | 2016-12-26 | Denitration system and denitration method for fuel gas of pulverized coal industrial boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611221469.3A CN106669393A (en) | 2016-12-26 | 2016-12-26 | Denitration system and denitration method for fuel gas of pulverized coal industrial boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106669393A true CN106669393A (en) | 2017-05-17 |
Family
ID=58871546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611221469.3A Pending CN106669393A (en) | 2016-12-26 | 2016-12-26 | Denitration system and denitration method for fuel gas of pulverized coal industrial boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106669393A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109012107A (en) * | 2018-09-10 | 2018-12-18 | 索通发展股份有限公司 | A kind of prebaked anode for aluminium electrolysis purifying fume from calcining furnace system |
-
2016
- 2016-12-26 CN CN201611221469.3A patent/CN106669393A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109012107A (en) * | 2018-09-10 | 2018-12-18 | 索通发展股份有限公司 | A kind of prebaked anode for aluminium electrolysis purifying fume from calcining furnace system |
| CN109012107B (en) * | 2018-09-10 | 2020-12-11 | 索通发展股份有限公司 | Flue gas purification system of pre-baked anode roasting furnace for aluminum electrolysis |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107456865A (en) | The method of flue gas desulfurization and denitrification | |
| CN110665352A (en) | Dry desulfurization, denitrification and dust removal device and method for low-sulfur flue gas in cement kiln tail | |
| CN108554145A (en) | A kind of flue gas desulfurization denitration dust-removing takes off white device | |
| CN110180349A (en) | A kind of grate-kiln pelletizing flue gas minimum discharge system | |
| CN211358316U (en) | Low-sulfur flue gas dry desulfurization denitration dust collector in cement kiln tail | |
| CN106512687A (en) | Powdered coal industrial boiler flue gas denitrifying system and denitrifying method | |
| WO2021114084A1 (en) | Energy-saving ultralow flue gas purification system for waste incineration | |
| CN107812441A (en) | Flue gas dry desulfurizing method of denitration based on red mud | |
| CN106669393A (en) | Denitration system and denitration method for fuel gas of pulverized coal industrial boiler | |
| CN106731798A (en) | Granule materials Industrial Boiler flue gas denitrification system and method for denitration | |
| CN206597442U (en) | Fine coal industrial boiler flue gas denitrification system | |
| CN206404591U (en) | Granule materials Industrial Boiler flue gas denitrification system | |
| CN212999279U (en) | Flue gas treatment system for efficiently utilizing carbon monoxide | |
| CN206519037U (en) | The system of glass furnace fume accumulation of heat denitration | |
| CN206404564U (en) | Fine coal industrial boiler flue gas denitrification system | |
| CN106731800A (en) | The system of glass furnace fume accumulation of heat denitration and its application | |
| CN206881498U (en) | Granule materials Industrial Boiler flue gas denitrification system | |
| CN111437720A (en) | Glass flue gas catalytic oxidation desulfurization method | |
| CN206404556U (en) | The system of rotary hearth furnace flue gas accumulation of heat denitration | |
| CN206519026U (en) | Rotary hearth furnace flue gas denitrification system | |
| CN106669413A (en) | Denitration system and denitration method for smoke of particle material industrial boiler | |
| CN110523158A (en) | The system and method that the comprehensive collaboration of titanium dioxide calcined by rotary kiln tail gas is administered | |
| CN206410512U (en) | Smelting furnace | |
| CN106766956A (en) | Gas melting furnace flue accumulation of heat denitrification apparatus and method of denitration | |
| CN106731556A (en) | The system of rotary hearth furnace flue gas accumulation of heat denitration and its application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 102200 Beijing city Changping District Machi Town cow Road No. 18 Applicant after: Shenwu science and technology group Limited by Share Ltd Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18 Applicant before: Beijing Shenwu Environment Energy Technology Group Co., Ltd. |
|
| CB02 | Change of applicant information |