CN109210956A - It is a kind of industry furnace flue gas exhaust heat step condensation utilize and desulfurization and denitrification integral system - Google Patents
It is a kind of industry furnace flue gas exhaust heat step condensation utilize and desulfurization and denitrification integral system Download PDFInfo
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- CN109210956A CN109210956A CN201811219686.8A CN201811219686A CN109210956A CN 109210956 A CN109210956 A CN 109210956A CN 201811219686 A CN201811219686 A CN 201811219686A CN 109210956 A CN109210956 A CN 109210956A
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- flue gas
- heat exchanger
- correspondingly arranged
- desulfurization
- exhaust gases
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- 239000003546 flue gas Substances 0.000 title claims abstract description 149
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 148
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 38
- 230000023556 desulfurization Effects 0.000 title claims abstract description 35
- 238000009833 condensation Methods 0.000 title claims abstract description 25
- 230000005494 condensation Effects 0.000 title claims abstract description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 72
- 239000003507 refrigerant Substances 0.000 claims abstract description 38
- 238000000197 pyrolysis Methods 0.000 claims abstract description 27
- 238000010790 dilution Methods 0.000 claims abstract description 22
- 239000012895 dilution Substances 0.000 claims abstract description 22
- 239000000126 substance Substances 0.000 claims abstract description 11
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 10
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 9
- 239000000243 solution Substances 0.000 claims abstract description 9
- 239000003337 fertilizer Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 45
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 38
- 239000012530 fluid Substances 0.000 claims description 26
- 229910021529 ammonia Inorganic materials 0.000 claims description 19
- 239000003054 catalyst Substances 0.000 claims description 19
- 239000003513 alkali Substances 0.000 claims description 7
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 20
- 239000003517 fume Substances 0.000 abstract description 17
- 239000000446 fuel Substances 0.000 abstract description 11
- 239000000428 dust Substances 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 8
- 239000008187 granular material Substances 0.000 abstract description 8
- 239000004071 soot Substances 0.000 abstract description 8
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 230000000007 visual effect Effects 0.000 abstract description 5
- 230000009467 reduction Effects 0.000 abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract description 2
- 238000011084 recovery Methods 0.000 abstract description 2
- 239000002918 waste heat Substances 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 37
- 238000010438 heat treatment Methods 0.000 description 10
- 239000003344 environmental pollutant Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 231100000719 pollutant Toxicity 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 229920002313 fluoropolymer Polymers 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006392 deoxygenation reaction Methods 0.000 description 4
- 230000003009 desulfurizing effect Effects 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000004566 building material Substances 0.000 description 3
- 239000010962 carbon steel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000005504 petroleum refining Methods 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 238000009865 steel metallurgy Methods 0.000 description 3
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 239000008234 soft water Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- 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
-
- 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
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- 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
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2219/00—Treatment devices
- F23J2219/10—Catalytic reduction devices
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
Present invention discloses a kind of industrial furnace flue gas exhaust heat step condensation utilization and desulfurization and denitrification integral systems, it is correspondingly arranged with industrial furnace, the upper end of the industrial furnace is set as heat convection section, including chemical fertilizer dissolving tank, delivery pump, NaOH solution tank NaOH, metered dispensing unit, pyrolysis apparatus, dilution air, dilution air heater, denitrating flue gas heat exchanger, booster fan, air blower, multiply refrigerant heat exchanger, condensing heat exchanger, neutralization reaction pond, lye pond, flue gas heater and chimney.The present invention has the advantage that flue gas waste heat recovery is big, realize fume afterheat utilization and the combination of desulfurization and denitrification reaction, it reduces space and place occupies, fuel consumption is reduced, the integrated heat efficiency of industrial aluminum is improved, reach the zero-emission of soot dust granule object and eliminates chimney " white cigarette " phenomenon, reach energy conservation and emission reduction, the purpose of visual pollution is eliminated, the water-saving section steam quadruple effect unification of energy-saving and emission-reduction has a wide range of application.
Description
Technical field
The present invention relates to a kind of industrial furnace flue gas exhaust heat step condensation utilization and desulfurization and denitrification integral systems.
Background technique
The desulfurization and denitration now applied are two independent systems.And the reaction temperature respectively required is different.
Conventional denitrating system generally uses SCR denitration system, and the temperature range of reaction is at 250 ~ 590 DEG C.Desulphurization reaction temperature
Degree is at 50 ~ 60 DEG C.
Conventional desulphurization system, into desulfurizing tower flue-gas temperature generally at 120 DEG C ~ 150 DEG C or so, and desulphurization reaction
Need temperature at 50 ~ 60 DEG C, it is therefore desirable to flue gas be cooled down with a large amount of valuable water, flue gas is caused finally to be expelled to chimney
When, water content is very big.If can generate " Wet chimney " phenomenon without the reheating of flue gas, cause corrosion failure to chimney, make
At security risk, influence to keep the safety in production；And the product that the desulfurizing agent carried in flue gas reacts generation with SOx in flue gas can be in chimney
Near exit condensation falls to form " mud rain ", equally causes the pollution to environment.Cause chimney " white cigarette " phenomenon of visual pollution
Exactly because carrying a large amount of vapor and water formation from the flue gas after desulfurization.
Conventional denitrating system generally uses SCR denitration system.Reaction interval temperature is at 250 ~ 590 DEG C.It is most effective at present
Method of denitration, denitration efficiency up to 95% on.
The desulfurization and SCR denitration system applied now, are independent system, take up a large area, high to site space requirement,
Primary investment is big, and operation operating cost is high, easily formation secondary pollution, and be purely for environment protection emission is up to standard and what is added be
System does not consider the comprehensive utilization of fume afterheat.
Widely used work in the industries such as petroleum refining, petrochemical industry, chemistry, chemical fibre, iron and steel metallurgy, glass ceramics building materials
Industry furnace, is provided with residual neat recovering system, it is general using air preheater from industrial furnace come temperature at 300 DEG C ~ 450 DEG C
Flue gas and room temperature combustion air exchange heat, reduce exhaust gas temperature, improve combustion air temperature, carry out Mist heat recovering.
For general exhaust gas temperature at 120 ~ 200 DEG C, the thermal efficiency is about 85~92%.Still there are a large amount of physical sensible heats not have in flue gas
It is utilized effectively.
At the same time, contain a large amount of vapor (content 10 ~ 20%) in the flue gas generated due to fuel combustion, vaporization is latent
Hot (account for about lower calorific value of fuel 10%) is discharged with flue gas, causes very big energy dissipation.
And under low efficiency, smoke discharge amount is big, and pollutant discharge amount is big, and Pollutant emission concentration is high, environmental pollution
Seriously.
It restricts and reduces exhaust gas temperature, a key factor of the raising thermal efficiency is exactly the dewpoint corrosion of equipment and pipeline
Problem.
Summary of the invention
The purpose of the present invention is to provide a kind of flue gas waste heat recovery is big, realize that fume afterheat utilizes and desulphurization denitration is anti-
The combination answered, reduces space and place occupies, and reduces fuel consumption, improves the integrated heat efficiency of industrial aluminum, reach flue dust
Particulate matter zero-emission and elimination chimney " white cigarette " phenomenon, reach energy conservation and emission reduction, eliminate the purpose of visual pollution, energy-saving and emission-reduction section
The unification of water section steam quadruple effect, the industrial furnace flue gas exhaust heat step condensation having a wide range of application utilizes and desulfurization and denitrification integral system.
The technical scheme is that a kind of industry furnace flue gas exhaust heat step condensation utilizes and desulfurization and denitrification integral system
System, is correspondingly arranged with industrial furnace, and the upper end of the industrial furnace is set as heat convection section, including chemical fertilizer dissolving tank, delivery pump,
NaOH solution tank NaOH, metered dispensing unit, pyrolysis apparatus, dilution air, dilution air heater, denitrating flue gas heat exchanger, booster fan, sky
Gas blower, multiply refrigerant heat exchanger, condensing heat exchanger, neutralization reaction pond, lye pond, flue gas heater and chimney, describedization
Fertile dissolving tank, delivery pump, NaOH solution tank NaOH, metered dispensing unit and pyrolysis apparatus are corresponding in turn to setting, and the metered dispensing unit
It is correspondingly arranged by ammonia nozzle with pyrolysis apparatus, the pyrolysis apparatus is correspondingly arranged by the fire door of ammonia nozzle and industrial furnace, the work
Industry furnace and pyrolysis apparatus are set through ammonia nozzle and by the way that preparing catalyst layer is corresponding with the exhaust gases passes entrance of denitrating flue gas heat exchanger
It sets, the exhaust gases passes outlet of the denitrating flue gas heat exchanger passes through booster fan and multiply refrigerant heat exchanger exhaust gases passes entrance pair
It should be arranged, the exhaust gases passes outlet of the multiply refrigerant heat exchanger and the exhaust gases passes entrance of condensing heat exchanger are correspondingly arranged, institute
The exhaust gases passes outlet for stating condensing heat exchanger was both correspondingly arranged with neutralization reaction pond, also by demister through the cold of flue gas heater
Fluid channel is correspondingly arranged with chimney, cold fluid pass outlet and the denitrating flue gas heat exchanger of the multiply refrigerant body heat exchanger
Cold fluid pass entrance is correspondingly arranged, the outlet of the cold fluid pass of the denitrating flue gas heat exchanger both with the back-end ductwork of industrial furnace
Ammonia nozzle be correspondingly arranged, also the cold fluid pass by dilution air through dilution air heater is correspondingly arranged with pyrolysis apparatus.
In a preferred embodiment of the present invention, the pyrolysis apparatus also with the exhaust gases passes entrance pair of denitrating flue gas heat exchanger
It should be arranged.
In a preferred embodiment of the present invention, the pyrolysis apparatus also passes through the flue gas of ammonia nozzle Yu denitrating flue gas heat exchanger
Feeder connection is correspondingly arranged.
In a preferred embodiment of the present invention, the cold fluid pass entrance of the multiply refrigerant heat exchanger is also correspondingly arranged
There is air blower.
In a preferred embodiment of the present invention, the cold fluid pass entrance of the denitrating flue gas heat exchanger and cold fluid are logical
Road outlet is also correspondingly arranged by flue-gas temperature compensation pipes.
In a preferred embodiment of the present invention, the lye pond is changed through alkali nozzle with condensation by the transfer line with pump
The exhaust gases passes entrance of hot device is correspondingly arranged.
In a preferred embodiment of the present invention, the exhaust gases passes of the neck connection dilution air heater of the industrial furnace
And it is correspondingly arranged with preparing catalyst layer.
In a preferred embodiment of the present invention, the booster fan is also corresponding with the exhaust gases passes entrance of flue gas heater
Setting, at this point, exhaust gases passes outlet of the exhaust gases passes outlet of flue gas heater also with multiply refrigerant heat exchanger is correspondingly arranged.
It is of the present invention to condense utilization and desulfurization and denitrification integral system, the present invention for a kind of industrial furnace flue gas exhaust heat step
It has the advantages that
1, the step condensation that this system realizes fume afterheat utilizes, and has recycled fume afterheat to the maximum extent；
2, this system realizes fume afterheat utilization and the combination of desulfurization and denitrification reaction；
3, system is arranged in industrial furnace tail flue gas exit, can cut out from system at any time, not influence industrial furnace main body system
Normal production run；
4, can On-line construction, especially suitable for existing industrial furnace system be transformed；
5, in the air preheater equipped with denitrating catalyst, heat exchange and denitration reaction carry out simultaneously, realize heat exchange denitration one
Body, reduces space and place occupies.And catalyst change is convenient, does not affect the normal production；
6, the sensible heat and most of vapor latent heat in 120 ~ 200 DEG C of low-temperature flue gas are recycled, fuel consumption, flue gas condensing are reduced
Water can be used as the use of boiler system raw water, reduce water resources consumption, improve the synthesis thermal effect of industrial furnace after preliminary treatment
Rate；
7, by using special material and structure, dew point corrosion and acid and alkali corrosion are solved the problems, such as.Guarantee that system equipment and component make
Use the service life；
8, fume afterheat step condensation utilization and desulfurization and denitrification integral are realized, while reaching soot dust granule object zero-emission, and
Eliminate chimney " white cigarette " phenomenon；
9, denitration efficiency >=90%；NOx emission concentration is up to 10 ~ 20mg/m3And it is following；
10, desulfuration efficiency >=90%；
11, the discharge of soot dust granule object is substantially zeroed；
12 are not necessarily to additional desulfurizing tower；Without the cooled flue gas water that consumption is needed Wei desulfurization reaction temperature is met, section
About use water；Reduce alkali lye consumption used in desulphurization reaction；
13, by flue gas condenser, flue gas further cools down and (is cooled to 30 ~ 60 DEG C), and vapor is most of cold in flue gas
It is solidifying, water vapour content in flue gas is reduced, condensate liquid can dissolve and absorb most of SOx, and adsorb the soot dust granule object in flue gas；
Flue gas is purified, and when necessary, desulfurization lye nozzle system can also be arranged, in flue gas condenser to reach better desulfurization
Efficiency purifies flue gas preferably；
14, flue gas condensing heat exchange and desulphurization reaction carry out in an equipment, without being respectively set, reduce occupied area, save
Investment；
15, the refrigerant heated in flue gas condensing heat exchanger, can be boiler soft water.From boiler water system come softened water into
Before entering thermal deaerator, it is heated to 60 ~ 90 DEG C in flue gas condensing heat exchanger, is then fed into boiler heating power oxygen-eliminating device and is removed
Oxygen reduces deoxygenation steam consumption；
16, the demister being arranged captures water mist drop in flue gas, reduces water existing for discharge flue fog drip shape；
17, flue gas heating device heats up cold flue gas, increases flue gas diffusivity, and reducing chimney, locally around area's pollutant is dense
It spends (if pollutant concentration and water vapour content are very low in flue gas, flue gas heating device can not be set), heat up heat source used in flue gas
Flue gas can also be heated using external heat source；
18, can achieve the purpose that simultaneously fume afterheat step condensation utilize and desulphurization denitration dedusting demisting eliminating white smoke, it can be achieved that
Flue gas ultra-clean zero release of pollutant while ensureing production safety, reaches energy conservation and emission reduction, eliminates the purpose of visual pollution；
19, the water-saving section steam quadruple effect unification of energy-saving and emission-reduction；
20, system is simple, and occupied area is small, once invests small, and operating cost is low；
21, all kinds of medium small boilers, petroleum refining, petrochemical industry, chemistry, chemical fibre, iron and steel metallurgy, glass pottery be can be widely applied to
Industrial furnace system in the industries such as porcelain building materials.
Detailed description of the invention
Fig. 1 is that a kind of industrial furnace flue gas exhaust heat step condensation of the present invention utilizes and desulfurization and denitrification integral system one is preferably real
Apply the schematic diagram in example；
Fig. 2 is a kind of industrial furnace flue gas exhaust heat step condensation utilization of the present invention and one preferred embodiment of desulfurization and denitrification integral system
In another schematic diagram；
Fig. 3 is a kind of industrial furnace flue gas exhaust heat step condensation utilization of the present invention and one preferred embodiment of desulfurization and denitrification integral system
In another schematic diagram.
Specific embodiment
The preferred embodiments of the present invention will be described in detail below so that advantages and features of the invention can be easier to by
It will be appreciated by those skilled in the art that so as to make a clearer definition of the protection scope of the present invention.
It is of the present invention to condense utilization and desulfurization and denitrification integral system, such as Fig. 1 for a kind of industrial furnace flue gas exhaust heat step
It is shown, it is correspondingly arranged with industrial furnace 1, the upper end of the industrial furnace 1 is set as heat convection section 2, including chemical fertilizer dissolving tank 3,
Delivery pump 4, NaOH solution tank NaOH 5, metered dispensing unit 6, pyrolysis apparatus 7, dilution air 8, dilution air heater 9, denitrating flue gas heat exchange
Device 10, booster fan 11, air blower 12, multiply refrigerant heat exchanger 13, condensing heat exchanger 14, neutralization reaction pond 15, lye pond
16, flue gas heater 17 and chimney 18, the chemical fertilizer dissolving tank 3, delivery pump 4, NaOH solution tank NaOH 5, metered dispensing unit 6 and pyrolysis
Device 7 is corresponding in turn to setting, and the metered dispensing unit 6 is correspondingly arranged by ammonia nozzle 19 with pyrolysis apparatus 7, the pyrolysis apparatus
7 are correspondingly arranged by ammonia nozzle 6 and the fire door of industrial furnace 1, and the industrial furnace 1 and pyrolysis apparatus 7 are through ammonia nozzle 6 and by spare
Catalyst layer 20 and the exhaust gases passes entrance of denitrating flue gas heat exchanger 10 are correspondingly arranged, the flue gas of the denitrating flue gas heat exchanger 10
Channel outlet is correspondingly arranged by booster fan 11 and the exhaust gases passes entrance of multiply refrigerant heat exchanger 13, and the multiply refrigerant changes
The exhaust gases passes outlet of hot device 13 is correspondingly arranged with the exhaust gases passes entrance of condensing heat exchanger 14, the cigarette of the condensing heat exchanger 14
Gas channel outlet was both correspondingly arranged with neutralization reaction pond 15, also by cold fluid pass of the demister 21 through flue gas heater 17 with
Chimney 18 is correspondingly arranged, and the cold fluid pass entrance of the multiply refrigerant heat exchanger 13 is also correspondingly arranged on air blower 12, institute
The cold fluid pass for stating multiply refrigerant body heat exchanger 13 exports set corresponding with the cold fluid pass entrance of denitrating flue gas heat exchanger 10
It sets, the cold fluid pass outlet of the denitrating flue gas heat exchanger 10 is both corresponding with the ammonia nozzle 19 of the back-end ductwork of industrial furnace 1 to be set
It sets, is also correspondingly arranged by cold fluid pass of the dilution air 8 through dilution air heater 9 with pyrolysis apparatus 7, the denitrating flue gas
Cold fluid pass entrance and the cold fluid pass outlet of heat exchanger 10 are also correspondingly arranged by flue-gas temperature compensation pipes 22, described
Lye pond 16 is correspondingly arranged by the transfer line 24 with pump 23 through alkali nozzle 25 and the exhaust gases passes entrance of condensing heat exchanger 14.
Embodiment one
The booster fan 11 is also correspondingly arranged with the exhaust gases passes entrance of flue gas heater 17, at this point, flue gas heater 17
Exhaust gases passes outlet of the exhaust gases passes outlet also with multiply refrigerant heat exchanger 13 is correspondingly arranged, the neck connection of the industrial furnace 1
The exhaust gases passes of dilution air heater 9 are simultaneously correspondingly arranged with preparing catalyst layer 20.
Embodiment two
As shown in Fig. 2, the pyrolysis apparatus 7 is also correspondingly arranged with the exhaust gases passes entrance of denitrating flue gas heat exchanger 10.
Embodiment three
As shown in Fig. 3, the pyrolysis apparatus 7 is also corresponding with the exhaust gases passes entrance of denitrating flue gas heat exchanger 10 by ammonia nozzle 19
Setting.
This system process is as follows:
1.1. 300 ~ 450 DEG C of the flue gas come from industrial furnace main body system, into denitrating flue gas heat exchanger (its heat exchange element cigarette
Gas side is coated with denitrating catalyst, and perhaps its flue gas wing passage is built-in is filled with denitrating catalyst or its heat exchange element fume side
Coated with denitrating catalyst and its flue gas wing passage is built-in is filled with denitrating catalyst) with the Low Temperature Thermal that comes from multiply refrigerant heat exchanger
Air heat-exchange, flue-gas temperature are down to 150 DEG C ~ 200 DEG C；
1.2. simultaneously, solid chemical fertilizer (urea) dissolves in chemical fertilizer dissolving tank, is pumped into NaOH solution tank NaOH via conveying, solution is through counting
Amount distributor enters pyrolysis apparatus, then issues raw pyrolytic reaction life from 500 ~ 600 DEG C of the air effect that dilution wind heater comes
At pyrolysis gas containing ammonia, into be arranged in the flue of denitrating flue gas heat exchanger upstream or be arranged in industrial furnace back-end ductwork or
The ammonia nozzle system or be respectively provided with ammonia nozzle for guarantee several places of ammonia mixing efficiency that person is arranged in the emptying of industrial furnace provided pipe
System enters the catalyst layer being arranged in denitrating flue gas heat exchanger after mixing under the action of mixing distributor with flue gas,
Denitration reaction occurs with NOx under the action of catalyst, generates N2And H2O, NOx concentration can be reduced to 10 ~ 20mg/m3And it is following；
1.3. temperature is down to 150 DEG C ~ 200 DEG C of low-temperature flue gas, after being pressurized by booster fan enter multiply refrigerant heat exchanger with
Refrigerant (including air) therein exchanges heat, and flue-gas temperature is down to 60 DEG C ~ 100 DEG C；
1.4. 60 DEG C ~ 100 DEG C flue gases enter in condensing heat exchanger, exchange heat with refrigerant, flue-gas temperature is down to 30 ~ 60 DEG C, makes cigarette
Most of vapor (60% ~ 80%) is condensed into water in gas, and condensed water dissolves and absorbs the SOx in flue gas, and adsorbs the cigarette in flue gas
Dirt particulate matter；Condensed water is discharged into alkaline matter in neutralization reaction pond and pond by pipeline and neutralization reaction occurs, and liquid is arranged after reaction
Enter sewerage and discharge is uniformly processed, or is delivered to following resource processing system and carries out recycling treatment (as being sent into boiler water
Processing system is used as raw water, is saved water).When necessary, desulfurization lye nozzle system is set in condensing heat exchanger, to reach
To better desulfuration efficiency；
1.5. (most of NOx, SOx, H2O, soot dust granule are stripped of from 30 ~ 60 DEG C of the purifying smoke that condensing heat exchanger comes out
Object, part CO2) by the demister of setting, it is dripped with capturing water mist in flue gas, reduces water existing for flue fog drip shape.Demisting
Device setting cleaning facility, keeps its fog removal performance.
1.6. 30 ~ 60 DEG C of cold flue gas that demister comes out enter flue gas heater and 150 ~ 200 DEG C from industrial furnace
Hot fume exchanges heat, and is warming up to 60 ~ 90 DEG C and is discharged into atmosphere into chimney.Hot fume is cooled to 80 ~ 100 DEG C and enters condensing heat-exchange
Device inlet participates in heat exchange subsequent process.
Dilution wind can lead to dilution wind heater from the cold fluid pass exit of denitrating flue gas heat exchanger；It can also be with
Dilution wind heater is introduced directly from atmosphere；Dilution wind can also be led to from the air outlet slit in multiply refrigerant heat exchanger
Heater；In multiply refrigerant heat exchanger with the refrigerant of flue gas heat exchange, can be fuel combustion air, water at low temperature, fuel gas,
The liquid or gas or in which any two or the combination of a variety of refrigerants that liquid fuel or any other needs heat.
When refrigerant is combustion air, the cold air after heating enters industrial furnace combustion system for fuel by air line
Burning is used.
When refrigerant is fuel, the fuel after heating enters the burning of industrial furnace combustion system by burning line.
Other refrigerants pass in and out multiply refrigerant heat exchanger according to requirements of process.
In condensing heat exchanger with the refrigerant of flue gas heat exchange, can be room temperature or low temperature softening water, recirculated cooling water or its
His low temperature cold fluid or in which any one or two kinds and the combination of the above refrigerant.
For example softened water send to boiler heating power deaerating type of cycles after heating and carries out deoxygenation, reduces deoxygenation high-quality steam
Dosage achievees the purpose that steam is saved in energy conservation.
Low temperature refrigerant passes in and out multiply refrigerant heat-exchange system according to requirements of process.
" denitrating flue gas heat exchanger " is plate heat exchanger in system, and heat transfer element fume side is coated with denitrating catalyst
And/or denitrating catalyst is loaded in its exhaust gases passes, can be realized denitration reaction and heat exchange while being carried out.Catalyst root therein
According to the section and gradient of equipment each section flue-gas temperature and heat exchanger plates wall temperature, equipped with adaptable high temperature, medium temperature and low-temperature catalyzed
Agent.
Heat exchange equipment in system in " multiply refrigerant heat exchanger ", " condensing heat exchanger " and " flue gas heater " is acid and alkali-resistance
Corrosion compound (or fluoroplastics) board-like or compound (or fluoroplastics) pipe heat exchanger or compound (or fluoroplastics) it is board-like and
The combination of compound (or fluoroplastics) tubular type.Feature is that solve the problems, such as the acid-alkali-corrosive-resisting of equipment from material and structure, is guaranteed
Its service life.And due to using special construction and special fabrication processes, leakage rate is substantially zeroed.It ensure that heat exchange effect
Rate and safety in utilization.
The heat exchange element of denitrating flue gas heat exchanger can be plate, be also possible to the corrugated plating of compression moulding, and material can be with
It is that carbon steel, ND steel, is examined and steps on steel, aluminium alloy, titanium alloy etc. stainless steel.
Composite plate can be plate, be also possible to the corrugated plating of compression moulding, and substrate can be, carbon steel, stainless steel, ND
Steel is examined and steps on steel, aluminium alloy, titanium alloy etc..
Fluoroplastic plate material is polytetrafluoroethylene (PTFE) or modified Teflon.
Multiple tube can be compound light pipe, be also possible to composite fin tube, and substrate can be, carbon steel, stainless steel, ND steel,
It examines and steps on steel, aluminium alloy, titanium alloy etc..
Fluorine plastic tube is polytetrafluoroethylene (PTFE) or modified Teflon.
It is of the present invention to condense utilization and desulfurization and denitrification integral system, the present invention for a kind of industrial furnace flue gas exhaust heat step
It has the advantages that
1, the step condensation that this system realizes fume afterheat utilizes, and has recycled fume afterheat to the maximum extent；
2, this system realizes fume afterheat utilization and the combination of desulfurization and denitrification reaction；
3, system is arranged in industrial furnace tail flue gas exit, can cut out from system at any time, not influence industrial furnace main body system
Normal production run；
4, can On-line construction, especially suitable for existing industrial furnace system be transformed；
5, in the air preheater equipped with denitrating catalyst, heat exchange and denitration reaction carry out simultaneously, realize heat exchange denitration one
Body, reduces space and place occupies.And catalyst change is convenient, does not affect the normal production；
6, the sensible heat and most of vapor latent heat in 120 ~ 200 DEG C of low-temperature flue gas are recycled, fuel consumption, flue gas condensing are reduced
Water can be used as the use of boiler system raw water, reduce water resources consumption, improve the synthesis thermal effect of industrial furnace after preliminary treatment
Rate；
7, by using special material and structure, dew point corrosion and acid and alkali corrosion are solved the problems, such as.Guarantee that system equipment and component make
Use the service life；
8, fume afterheat step condensation utilization and desulfurization and denitrification integral are realized, while reaching soot dust granule object zero-emission, and
Eliminate chimney " white cigarette " phenomenon；
9, denitration efficiency >=90%；NOx emission concentration is up to 10 ~ 20mg/m3And it is following；
10, desulfuration efficiency >=90%；
11, the discharge of soot dust granule object is substantially zeroed；
12 are not necessarily to additional desulfurizing tower；Without the cooled flue gas water that consumption is needed Wei desulfurization reaction temperature is met, section
About use water；Reduce alkali lye consumption used in desulphurization reaction；
13, by flue gas condenser, flue gas further cools down and (is cooled to 30 ~ 60 DEG C), and vapor is most of cold in flue gas
It is solidifying, water vapour content in flue gas is reduced, condensate liquid can dissolve and absorb most of SOx, and adsorb the soot dust granule object in flue gas；
Flue gas is purified, and when necessary, desulfurization lye nozzle system can also be arranged, in flue gas condenser to reach better desulfurization
Efficiency purifies flue gas preferably；
14, flue gas condensing heat exchange and desulphurization reaction carry out in an equipment, without being respectively set, reduce occupied area, save
Investment；
15, the refrigerant heated in flue gas condensing heat exchanger, can be boiler soft water.From boiler water system come softened water into
Before entering thermal deaerator, it is heated to 60 ~ 90 DEG C in flue gas condensing heat exchanger, is then fed into boiler heating power oxygen-eliminating device and is removed
Oxygen reduces deoxygenation steam consumption；
16, the demister being arranged captures water mist drop in flue gas, reduces water existing for discharge flue fog drip shape；
17, flue gas heating device heats up cold flue gas, increases flue gas diffusivity, and reducing chimney, locally around area's pollutant is dense
It spends (if pollutant concentration and water vapour content are very low in flue gas, flue gas heating device can not be set), heat up heat source used in flue gas
Flue gas can also be heated using external heat source；
18, can achieve the purpose that simultaneously fume afterheat step condensation utilize and desulphurization denitration dedusting demisting eliminating white smoke, it can be achieved that
Flue gas ultra-clean zero release of pollutant while ensureing production safety, reaches energy conservation and emission reduction, eliminates the purpose of visual pollution；
19, the water-saving section steam quadruple effect unification of energy-saving and emission-reduction；
20, system is simple, and occupied area is small, once invests small, and operating cost is low；
21, all kinds of medium small boilers, petroleum refining, petrochemical industry, chemistry, chemical fibre, iron and steel metallurgy, glass pottery be can be widely applied to
Industrial furnace system in the industries such as porcelain building materials.
The foregoing is merely a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, any
Those skilled in the art within the technical scope disclosed by the invention, can without the variation that creative work is expected or
Replacement, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be limited with claims
Subject to fixed protection scope.
Claims (8)
1. a kind of industry furnace flue gas exhaust heat step condensation utilizes and desulfurization and denitrification integral system, it is correspondingly arranged with industrial furnace, institute
The upper end for stating industrial furnace is set as heat convection section, it is characterised in that: including chemical fertilizer dissolving tank, delivery pump, NaOH solution tank NaOH, metering
Distributor, pyrolysis apparatus, dilution air, dilution air heater, denitrating flue gas heat exchanger, booster fan, air blower, multiply
Refrigerant heat exchanger, condensing heat exchanger, neutralization reaction pond, lye pond, flue gas heater and chimney, it is the chemical fertilizer dissolving tank, defeated
Send pump, NaOH solution tank NaOH, metered dispensing unit and pyrolysis apparatus to be corresponding in turn to setting, and the metered dispensing unit by ammonia nozzle with
Pyrolysis apparatus is correspondingly arranged, and the pyrolysis apparatus is correspondingly arranged by the fire door of ammonia nozzle and industrial furnace, the industrial furnace and pyrolysis apparatus
It is correspondingly arranged through ammonia nozzle and by preparing catalyst layer and the exhaust gases passes entrance of denitrating flue gas heat exchanger, the flue gas is de-
The exhaust gases passes outlet of nitre heat exchanger is correspondingly arranged by the exhaust gases passes entrance of booster fan and multiply refrigerant heat exchanger, described
The exhaust gases passes outlet of multiply refrigerant heat exchanger and the exhaust gases passes entrance of condensing heat exchanger are correspondingly arranged, the condensing heat exchanger
Exhaust gases passes outlet be both correspondingly arranged with neutralization reaction pond, also pass through cold fluid pass and cigarette of the demister through flue gas heater
Chimney is correspondingly arranged, and the cold fluid pass outlet of the multiply refrigerant body heat exchanger and the cold fluid pass of denitrating flue gas heat exchanger enter
Mouth is correspondingly arranged, and the cold fluid pass outlet of the denitrating flue gas heat exchanger was both corresponding with the ammonia nozzle of the back-end ductwork of industrial furnace
Setting, also the cold fluid pass by dilution air through dilution air heater is correspondingly arranged with pyrolysis apparatus.
2. industry furnace flue gas exhaust heat step condensation according to claim 1 utilizes and desulfurization and denitrification integral system, special
Sign is: the pyrolysis apparatus is also correspondingly arranged with the exhaust gases passes entrance of denitrating flue gas heat exchanger.
3. industry furnace flue gas exhaust heat step condensation according to claim 1 utilizes and desulfurization and denitrification integral system, special
Sign is: the pyrolysis apparatus also passes through ammonia nozzle and the exhaust gases passes entrance of denitrating flue gas heat exchanger is correspondingly arranged.
4. industry furnace flue gas exhaust heat step condensation according to claim 1 utilizes and desulfurization and denitrification integral system, special
Sign is: the cold fluid pass entrance of the multiply refrigerant heat exchanger is also correspondingly arranged on air blower.
5. industry furnace flue gas exhaust heat step condensation according to claim 1 utilizes and desulfurization and denitrification integral system, special
Sign is: cold fluid pass entrance and the cold fluid pass outlet of the denitrating flue gas heat exchanger, which are also compensated by flue-gas temperature, manages
Line is correspondingly arranged.
6. industry furnace flue gas exhaust heat step condensation according to claim 1 utilizes and desulfurization and denitrification integral system, special
Sign is: the lye pond passes through the transfer line with pump and sets through alkali nozzle is corresponding with the exhaust gases passes entrance of condensing heat exchanger
It sets.
7. industry furnace flue gas exhaust heat step condensation according to claim 1 utilizes and desulfurization and denitrification integral system, special
Sign is: the exhaust gases passes of the neck connection dilution air heater of the industrial furnace are simultaneously correspondingly arranged with preparing catalyst layer.
8. industry furnace flue gas exhaust heat step condensation according to claim 1 utilizes and desulfurization and denitrification integral system, special
Sign is: the booster fan is also correspondingly arranged with the exhaust gases passes entrance of flue gas heater, at this point, the flue gas of flue gas heater
Exhaust gases passes outlet of the channel outlet also with multiply refrigerant heat exchanger is correspondingly arranged.
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| CN114216346A (en) * | 2021-12-23 | 2022-03-22 | 中冶南方（武汉）热工有限公司 | Cold-rolled stainless steel annealing furnace waste heat gradient recycling system and method |
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