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 PDF

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Publication number
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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CN201811219686.8A
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CN109210956B (en
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付玲君
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Shanghai Fu Wang Furnace Co Ltd
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Shanghai Fu Wang Furnace Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004Systems for reclaiming waste heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/006Layout of treatment plant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/08Arrangements of devices for treating smoke or fumes of heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/008Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00Preventing emissions
    • F23J2215/10Nitrogen; Compounds thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2215/00Preventing emissions
    • F23J2215/20Sulfur; Compounds thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2219/00Treatment devices
    • F23J2219/10Catalytic reduction devices
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

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  • 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

It is a kind of industry furnace flue gas exhaust heat step condensation utilize and desulfurization and denitrification integral system
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.
CN201811219686.8A 2018-10-19 2018-10-19 Industrial furnace flue gas waste heat cascade condensation utilization and desulfurization and denitrification integrated system Active CN109210956B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110131741A (en) * 2019-06-16 2019-08-16 清华大学 Haze is removed and disappear whitening method and system based on the flue gas that waste heat driving and full ingredient are administered
CN110385007A (en) * 2019-07-16 2019-10-29 河南迪诺环保科技股份有限公司 A kind of de- whitening method of the flue gas improving heat utilization rate
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103028315A (en) * 2013-01-08 2013-04-10 洛阳瑞昌石油化工设备有限公司 Catalytic cracking regenerated flue gas condensing and desulfurizing equipment and technique
CN104819571A (en) * 2014-10-21 2015-08-05 保定市恒宇机械电器制造有限公司 Condensed gas waste heat recovery device
CN106705090A (en) * 2016-12-02 2017-05-24 华电电力科学研究院 SCR system based on flue gas waste heat gradient utilization and SCR denitration method
US20170160013A1 (en) * 2014-09-24 2017-06-08 Cas Super Energy Technology Jingjiang Ltd. Denitration and waste heat recovery integrated furnace
CN107497297A (en) * 2016-12-29 2017-12-22 大唐环境产业集团股份有限公司 A kind of denitration dilution wind heat-exchange system
CN208968299U (en) * 2018-10-19 2019-06-11 上海孚旺炉业有限公司 It is a kind of industry furnace flue gas exhaust heat step condensation utilize and desulfurization and denitrification integral system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103028315A (en) * 2013-01-08 2013-04-10 洛阳瑞昌石油化工设备有限公司 Catalytic cracking regenerated flue gas condensing and desulfurizing equipment and technique
US20170160013A1 (en) * 2014-09-24 2017-06-08 Cas Super Energy Technology Jingjiang Ltd. Denitration and waste heat recovery integrated furnace
CN104819571A (en) * 2014-10-21 2015-08-05 保定市恒宇机械电器制造有限公司 Condensed gas waste heat recovery device
CN106705090A (en) * 2016-12-02 2017-05-24 华电电力科学研究院 SCR system based on flue gas waste heat gradient utilization and SCR denitration method
CN107497297A (en) * 2016-12-29 2017-12-22 大唐环境产业集团股份有限公司 A kind of denitration dilution wind heat-exchange system
CN208968299U (en) * 2018-10-19 2019-06-11 上海孚旺炉业有限公司 It is a kind of industry furnace flue gas exhaust heat step condensation utilize and desulfurization and denitrification integral system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110131741A (en) * 2019-06-16 2019-08-16 清华大学 Haze is removed and disappear whitening method and system based on the flue gas that waste heat driving and full ingredient are administered
CN110131741B (en) * 2019-06-16 2024-04-23 清华大学 Flue gas haze and white removing method and system based on waste heat driving and full component treatment
CN110385007A (en) * 2019-07-16 2019-10-29 河南迪诺环保科技股份有限公司 A kind of de- whitening method of the flue gas improving heat utilization rate
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
CN114216346B (en) * 2021-12-23 2023-11-03 中冶南方(武汉)热工有限公司 Cascade recycling system and method for waste heat of cold-rolled stainless steel annealing furnace

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