CN108823352A - A kind of converter gas dry type waste heat recycling dust-extraction unit and method - Google Patents

A kind of converter gas dry type waste heat recycling dust-extraction unit and method Download PDF

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Publication number
CN108823352A
CN108823352A CN201810642358.2A CN201810642358A CN108823352A CN 108823352 A CN108823352 A CN 108823352A CN 201810642358 A CN201810642358 A CN 201810642358A CN 108823352 A CN108823352 A CN 108823352A
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CN
China
Prior art keywords
gas
waste heat
water
flue
cooling
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Pending
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CN201810642358.2A
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Chinese (zh)
Inventor
李博
魏小林
李腾
何华霄
张富欣
李森
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Institute of Mechanics of CAS
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Institute of Mechanics of CAS
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Priority to CN201810642358.2A priority Critical patent/CN108823352A/en
Publication of CN108823352A publication Critical patent/CN108823352A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/38Removal of waste gases or dust
    • C21C5/40Offtakes or separating apparatus for converter waste gases or dust
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/38Removal of waste gases or dust
    • 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

Abstract

The present embodiments relate to a kind of converter gas dry type waste heat recycling dedusting assembling devices and method, device to include:Converter (1), gasification cooling flue (2), waste heat boiler (6), wet cooling tower (7), electric precipitator (8), primary air fan (9), switching valve (10), gas change heater (12), gas chamber (13), diffusing tower (14) and spring explosion venting valve (15);Gasification cooling flue (2), waste heat boiler (6), wet cooling tower (7), electric precipitator (8), primary air fan (9), switching valve (10), gas change heater (12), gas chamber (13) and diffusing tower (14) are sequentially connected by pipeline.The water spray in temperature-fall period is avoided, replaces original dry process flue gas with heat-exchange dedusting method processing flue gas, flue gas goes out from gasification cooling flue, and diffusing tower or gas chamber are entered after residual heat boiler for exchanging heat, and heat recovery improves the utilization rate of energy, reduces cost.

Description

A kind of converter gas dry type waste heat recycling dust-extraction unit and method
Technical field
The present embodiments relate to smelting iron and steel converter gas technical field more particularly to a kind of converter gas dry type waste heats Recycle dust-extraction unit and method.
Background technique
Once dust collection of converter equipment is the indispensable craft dust removal link of pneumatic steelmaking, at present domestic converter dust-removing side Formula is broadly divided into wet process " OG " method and dry method " LT " method, and dry dedusting of converter " LT " method is more novel dedusting knot Structure, process flow are:Converter high-temperature flue gas enters evaporation through gasification cooling flue dry flue gas after cooling under fan action Cooler puts out a fire to flue gas by it, is cooled down, rough dedusting, and the flue gas of about 200 degree of formation then enters the electric precipitator on ground Refined dedusting is carried out, then enters coal gas switching station after high-temperature blower:When being unsatisfactory for coal-gas recovering condition, flue gas enters release side Carry out coal gas ignition release;Enter recycling side when meeting coal-gas recovering condition, flue gas enters gas chamber after another step cooling For recycling.Dry method dust effect can reach discharge 50mg/m3 or less, be the dedusting method of current better dust removal effect.
Dry method dust has the characteristics that water and electric saving compared with wet dedusting, greatly reduces its operating cost, thereby reduces Steel-making cost, but due to its high investment, the unit of domestic construction converter dry dedusting is less at present.And converter gas UTILIZATION OF VESIDUAL HEAT IN, being currently limited to 1650-1000 DEG C of gasification cooling flue of high temperature section has partial heat energy recycling, and after 1000 DEG C Substantially it is all wasted.
This project utilizes cyclone dust collectors and waste heat on the basis of reservation converter original gasification cooling flue waste heat recycling Boiler, completes dry dirt collection and flue gas cool-down, flue-gas temperature carry out refined dedusting, dust after dedusting again when being down to 200 DEG C or so Concentration≤50mg/m3.The project makes while converter gas heat is fully utilized, and completes dry method dust, has both been conducive to dry Dirt is reused for the techniques such as sintering, while realizing the abundant recycling of water-saving, section vapour, economize on electricity and thermal energy.
But existing dry method dust still needs to spray cooling, water spray cleaning into flue gas, therefore has the disadvantage that:
(1), due to spraying water into flue gas, three large resources of converter gas, function and benefit then becomes minimizing;
(2), converter CO coal gas becomes aqueous and water vapour coal gas, and calorific value reduces, pipe network maintenance increases, comprehensive utilization It is restricted;
(3), smoke heat energy becomes flue gas, and a large amount of thermal energy slattern;
(4), furnace dirt changes original oxide characteristics because of water spray, and becomes sludge or hydrous oxide, and in treatment process In, become pollution sources;
(5), water spray process largely consumes water-vapor quality, increases power consumption.
Summary of the invention
It is existing to solve the embodiment of the invention provides a kind of converter gas dry type waste heat recycling dedusting assembling device and method The problem of method for handling converter gas, leads to great lot of water resources and heat waste, and the production cost increases.
In a first aspect, the embodiment of the invention provides a kind of converter gas dry type waste heats to recycle dust-extraction unit, including:
Converter 1, gasification cooling flue 2, waste heat boiler 6, wet cooling tower 7, electric precipitator 8, primary air fan 9, switching valve 10, gas change heater 12, gas chamber 13, diffusing tower 14 and spring explosion venting valve 15;
The gasification cooling flue 2, the waste heat boiler 6, the wet cooling tower 7, the electric precipitator 8, described one Secondary blower 9, the switching valve 10, the gas change heater 12, the gas chamber 13 and the diffusing tower 14 pass through pipeline successively Connection.
In a possible embodiment, cyclone dust collectors 4 are additionally provided with before the waste heat boiler 6;
The cyclone dust collectors 4 are connect with the waste heat boiler 6 and the gasification cooling flue 2 by pipeline respectively;
Wherein, spring venting of dust explosion is additionally provided on the pipeline connected between the cyclone dust collectors 4 and the waste heat boiler 6 Valve 15.
In a possible embodiment, the connection between the gasification cooling flue 2 and the cyclone dust collectors 4 In connecting pipe on pipeline, between the wet cooling tower 7 and the electric precipitator 8, the waste heat boiler 6 with it is described High temperature resistant gate valve 3 is provided in connecting pipe between electric precipitator 8 and on gasification cooling flue 2;
The high temperature resistant gate valve 3 is for being truncated the pipeline.
In a possible embodiment, the high temperature resistant gate valve 3 is using two phase stainless steel as spool and valve body Material, valve are sealed using hard, have built castable outside spool and in valve body.
In a possible embodiment, the cyclone dust collectors 4 are designed using water cooling, and cooling water uses softened water, It is heated while softened water cooling cyclone dust collectors 4, the softened water after heating enters the economizer of waste heat boiler 6;
Or,
The cyclone dust collectors 4 are arranged to be insulated, and water-cooling jacket is not added.
In a possible embodiment, the outlet of the cyclone dust collectors 4 is additionally provided with lag cooler 5 or has water The module of cold slag function.
In a possible embodiment, the lag cooler 5 uses cylinder type cold slag machine, is passed through softened water in lag cooler Warm sludge is cooled down, cyclone dust extractor water cooling set and explosion venting valve water-cooled jacket are entered after softened water heating, lime-ash after cooling is logical Conveyer is crossed to be transported away.
In a possible embodiment, the waste heat boiler 6 uses explosion-proof vertical waste heat boiler, and waste heat boiler is fire The form of pipe boiler.
In a possible embodiment, the connecting tube of the spring explosion venting valve 15 is welded type water-cooled jacket, water-cooled jacket Softened water is passed through inside and outside point among two layers, two layers, softens water composite cooling pipe wall, the oxygen-eliminating device of waste heat boiler 6 is entered after heating.
Second aspect, inventive embodiments provide a kind of converter gas dry type waste heat recycling dust removal method, including:
Flue gas enters cyclone dust collectors 4 by gasification cooling flue 2 from petticoat pipe and carries out rough dedusting;
Flue gas after rough dedusting enters waste heat boiler 6 and carries out waste heat recycling, wherein water carries out heat with flue gas and exchanges, water The energy warms discharged by flue gas are reduced at saturated vapor, the temperature of flue gas;
Flue gas after heat exchange enters electric precipitator 8 and carries out refined dedusting;
By electric precipitator 8, treated that flue gas enters primary air fan 9;
Flue gas after primary air fan 9 enters diffusing tower 14 or enters gas change heater 13 or enter gas cooler 11;
Enter gas chamber 13 by gas change heater 12 or the flue gas after cooling of gas cooler 11, wherein water and flue gas Heat exchange is carried out, the energy warms that water is discharged by flue gas are reduced at hot water, the temperature of flue gas.
Converter gas dry type waste heat recycling dust-extraction unit provided in an embodiment of the present invention and method, avoid in temperature-fall period Water spray, replace original dry process flue gas with heat-exchange dedusting method processing flue gas, flue gas goes out from gasification cooling flue, by waste heat Enter diffusing tower or gas chamber after boiler heat exchange, heat recovery improves the utilization rate of energy, reduces cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that a kind of converter gas dry type waste heat provided in an embodiment of the present invention recycles dust-extraction unit;
Fig. 2 is that a kind of converter gas dry type waste heat provided in an embodiment of the present invention recycles dust removal method flow chart;
Converter -1, gasification cooling flue -2, high temperature resistant gate valve -3, cyclone dust collectors -4, lag cooler -5, waste heat boiler - 6, devaporizer -7, electric precipitator -8, primary air fan -9, bell valve 10, gas cooler -11, gas change heater -12, coal Gas holder -13 and diffusing tower -14.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In order to facilitate understanding of embodiments of the present invention, it is further explained below in conjunction with attached drawing with specific embodiment Bright, embodiment does not constitute the restriction to the embodiment of the present invention.
Fig. 1 is the structural schematic diagram that a kind of converter gas dry type waste heat provided in an embodiment of the present invention recycles dust-extraction unit, As shown in Figure 1, the equipment includes:
Converter 1, gasification cooling flue 2, waste heat boiler 6, wet cooling tower 7, electric precipitator 8, primary air fan 9, switching valve 10, gas change heater 12, gas chamber 13, diffusing tower 14 and spring explosion venting valve 15;
The gasification cooling flue 2, the waste heat boiler 6, the wet cooling tower 7, the electric precipitator 8, described one Secondary blower 9, the switching valve 10, the gas change heater 12, the gas chamber 13 and the diffusing tower 14 pass through pipeline successively Connection.
Wherein, the primary air fan 9 is frequency control blower, regulation power can overcome pipeline and equipment according to actual needs Resistance provides negative pressure for system, and 2 branch pipe(tube)s are installed in primary air fan exit, and a branch pipe(tube) connects diffusing tower 14, another branch pipe(tube) Towards gas chamber 13.
Optionally, cyclone dust collectors 4 are additionally provided with before the waste heat boiler 6;
The cyclone dust collectors 4 are connect with the waste heat boiler 6 and the gasification cooling flue 2 by pipeline respectively;
Wherein, spring venting of dust explosion is additionally provided on the pipeline connected between the cyclone dust collectors 4 and the waste heat boiler 6 Valve 15.
Gasification cooling flue is to cyclone dust collectors, and cyclone dust collectors to waste heat boiler pipeline are using included wear-resistant castable Rigid conduit, the rigid conduit of included wear-resistant castable are effective against washing away for exhaust gas dust, while reducing flue gas heat damage It loses, guarantees subsequent heat-exchange temperature.
Optionally, in the connecting pipe between the gasification cooling flue 2 and the cyclone dust collectors 4, in the steaming It sends out in the connecting pipe between cooling tower 7 and the electric precipitator 8, between the waste heat boiler 6 and the electric precipitator 8 High temperature resistant gate valve 3 is provided in connecting pipe and on gasification cooling flue 2;
The high temperature resistant gate valve 3 is for being truncated the pipeline.
By the handover operation of high temp.-resistant valve, flue gas may be selected to enter devaporizer or waste heat boiler, in waste heat pot When furnace needs repair and maintenance, flue gas can be thrown away by original process, will not influence production.
Optionally, the high temperature resistant gate valve 3 is using two phase stainless steel as spool and valve body material, and valve is using hard close It seals, has built castable outside spool and in valve body.
Optionally, the cyclone dust collectors 4 are designed using water cooling, and cooling water uses softened water, and the cooling whirlwind of softened water removes It is heated while dirt device 4, the softened water after heating enters the economizer of waste heat boiler 6;
Or,
The cyclone dust collectors 4 are arranged to be insulated, and water-cooling jacket is not added.
Flue gas by cyclone dust collectors rough dedusting enters waste heat boiler, avoids waste heat boiler dust stratification, improves waste heat boiler Heat exchange efficiency generates steam circulation and uses, while providing steam energy for others production.
Optionally, the outlet of the cyclone dust collectors 4 is additionally provided with lag cooler 5 or the mould with the cold slag function of water cooling Block.
Optionally, the lag cooler 5 uses cylinder type cold slag machine, is passed through softened water in lag cooler and cools down to warm sludge, Enter cyclone dust extractor water cooling set after softened water heating and explosion venting valve water-cooled jacket, lime-ash after cooling are transported away by conveyer.
High-temperature smoke carries out heat exchange with water in lag cooler, and flue dust is cooled down, and the water after preheating enters cyclone dust removal The water-cooled jacket of device takes full advantage of thermal energy while guaranteeing that flue dust is dry.
Optionally, the waste heat boiler 6 uses explosion-proof vertical waste heat boiler, and waste heat boiler is the form of multitubular boiler.
Waste heat boiler configuration soot blower can be such that the dust carried is attached to apparatus for ash, flue gas is let out after entering waste heat boiler On boiler heat exchange tube wall, the heat exchange efficiency of heat exchanger tube is caused to decline, the soot blower of waste heat boiler can be according to heat exchange tube wall Dust stratification situation carries out soot blowing operation, removes tube wall dust stratification, improves the heat exchange efficiency of boiler, extends service life.The dust of removing Furnace body is discharged by the apparatus for ash of letting out with leakproofness in furnace bottom, into ash bucket, for other production and processings.
Optionally, the connecting tube of the spring explosion venting valve 15 is welded type water-cooled jacket, and water-cooled jacket divides in two layers, two layers inside and outside Between be passed through softened water, soften water composite cooling pipe wall, the oxygen-eliminating device of waste heat boiler 6 entered after heating.
Specifically, the working principle of above-mentioned converter gas dry type waste heat recycling dust-extraction unit is:Flue gas is from 1 top of converter Petticoat pipe is collected, and a large amount of flue gases is generated in the smelting process of molten iron, flue gas exit temperature is up to 1500~1650 DEG C, and carries secretly A large amount of iron oxide dusts, the existing mainstream processing method of this partial fume use " LT " method, and the processing method is by 1500~1650 DEG C Flue gas be cooled to 900-1000 DEG C by gasification cooling flue, in devaporizer 7 using by the way of spraying water to flue gas into Row dedusting cooling, is down to 200 DEG C or so for flue-gas temperature, and the flue gas after cooling enters electric precipitator and carries out refined dedusting, passes through one Secondary blower send diffusing tower to burn or cooled down again into gas cooler, by 200 DEG C or so of flue gas cool-down to 60 DEG C or less Gas chamber is sent into collect.But along with water spray dedusting cooling, the temperature of flue gas is reduced to 60 DEG C or so from 1000 DEG C, this part The cooled water of heat is taken away, and wastes, while a large amount of cooling waters also increase processing cost, so removing in electricity for cooling down Before dirt device 8 and the flue gas of gas chamber 13 carries out heat recovery, can not only reuse, while can also protect environment.
The high temperature resistant gate valve 3 after gasification cooling flue 2, by the handover operation of high temperature resistant gate valve 3, coal gas be may be selected Into devaporizer 7 or waste heat boiler 6, cyclone dust collectors 4 are set before waste heat boiler 6, cyclone dust collectors 4 can carry out flue gas Lag cooler 5, the 650 DEG C big partial size dust that lag cooler 5 can retain cyclone dust collectors 4 are arranged below cyclone dust collectors 4 for rough dedusting It exchanges heat with softened water, the softened water after heating enters the drum of waste heat boiler 6, and dust after cooling is sent by conveyer to it Its production process.Waste heat boiler 6 is a vertical explosion-prevention waste heat boiler, 650 DEG C or so of high-temperature flue gas in the waste heat boiler with Softened water exchanges heat, and the softened water by heat exchange generates saturated vapor, while flue gas is cooled to 200 DEG C or so.Waste heat boiler 6 Air inlet uses the mode of upper entering and lower leaving, and high-temperature flue gas enters from waste heat boiler top, lower part discharge, and waste heat boiler is equipped with to be blown automatically Apparatus for ash, can periodically carry out automatic ash blowing operation, improve boiler heat exchange efficiency, and waste heat boiler furnace bottom is equipped with ash cellar, using unloading ash Valve carries out letting out ash.Waste heat boiler integrally uses Explosion-proof Design, and sealing performance is excellent.
Enter electric precipitator 8 by the flue gas that waste heat boiler 6 is cooled to 200 DEG C or so, electric precipitator 8 carries out essence to flue gas Dedusting, the exhaust gas dust content after refined dedusting are down to 50mg/m3Below.
Diffusing tower 14 or gas chamber 13 are sent by primary air fan 9 by the flue gas of electric precipitator 8.Primary air fan 9 is using change Frequency controls, and can provide suitable wind pressure according to flue gas flow and system resistance, play the purpose of economize on electricity.Pass through cutting for switching valve 10 Operation is changed, the flue gas of CO content qualification is admitted to gas chamber 13, and underproof flue gas is admitted to diffusing tower 14 and carries out burning release.
Flue gas is cooled down again before entering gas chamber 14, and flue gas may be selected to enter gas cooler 11 or gas change heater 12, gas change heater 12 cools down to flue gas by the way of flue gas and softened water heat exchange, enters waste heat after softened water heating The drum of boiler 6, flue-gas temperature drop to 60 DEG C or less from 200 DEG C or so and enter gas chamber 13.
Fig. 2 is that a kind of converter gas dry type waste heat provided in an embodiment of the present invention recycles dust removal method flow chart, such as Fig. 2 institute Show, this method includes:
S201, flue gas enter cyclone dust collectors by gasification cooling flue from petticoat pipe and carry out rough dedusting.
Flue gas after S202, rough dedusting enters waste heat boiler and carries out waste heat recycling.
Wherein, water is exchanged with flue gas progress heat, and the energy warms that water is discharged by flue gas are at saturated vapor, the temperature of flue gas It reduces;
Flue gas after S203, heat exchange enters electric precipitator and carries out refined dedusting.
S204, by electric precipitator, treated that flue gas enters primary air fan.
S205, the flue gas after primary air fan enter diffusing tower or enter gas change heater or enter gas cooler.
S206, enter gas chamber by gas change heater or gas cooler flue gas after cooling.
Wherein, water is exchanged with flue gas progress heat, and the energy warms that water is discharged by flue gas are dropped at hot water, the temperature of flue gas It is low.
Converter gas dry type waste heat recycling dust-extraction unit provided in an embodiment of the present invention and method, avoid in temperature-fall period Water spray, replace original dry process flue gas with heat-exchange dedusting method processing flue gas, flue gas goes out from gasification cooling flue, by waste heat Enter diffusing tower or gas chamber after boiler heat exchange, heat recovery improves the utilization rate of energy, reduces cost.
Professional should further appreciate that, described in conjunction with the examples disclosed in the embodiments of the present disclosure Unit and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, hard in order to clearly demonstrate The interchangeability of part and software generally describes each exemplary composition and step according to function in the above description. These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution. Professional technician can use different methods to achieve the described function each specific application, but this realization It should not be considered as beyond the scope of the present invention.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include Within protection scope of the present invention.

Claims (10)

1. a kind of converter gas dry type waste heat recycles dust-extraction unit, which is characterized in that including:
Converter (1), gasification cooling flue (2), waste heat boiler (6), wet cooling tower (7), electric precipitator (8), primary air fan (9), switching valve (10), gas change heater (12), gas chamber (13), diffusing tower (14) and spring explosion venting valve (15);
The gasification cooling flue (2), the waste heat boiler (6), the wet cooling tower (7), the electric precipitator (8), institute State primary air fan (9), the switching valve (10), the gas change heater (12), the gas chamber (13) and the diffusing tower (14) it is sequentially connected by pipeline.
2. the apparatus according to claim 1, which is characterized in that be additionally provided with cyclone dust collectors before the waste heat boiler (6) (4);
The cyclone dust collectors (4) are connect with the waste heat boiler (6) and the gasification cooling flue (2) by pipeline respectively;
Wherein, spring venting of dust explosion is additionally provided on the pipeline connected between the cyclone dust collectors (4) and the waste heat boiler (6) Valve (15).
3. the apparatus according to claim 1, which is characterized in that in the gasification cooling flue (2) and the cyclone dust removal In connecting pipe in connecting pipe between device (4), between the wet cooling tower (7) and the electric precipitator (8), It is respectively provided in connecting pipe between the waste heat boiler (6) and the electric precipitator (8) and on gasification cooling flue (2) There are high temperature resistant gate valve (3);
The high temperature resistant gate valve (3) is for being truncated the pipeline.
4. device according to claim 3, which is characterized in that the high temperature resistant gate valve (3) is made using two phase stainless steel For spool and valve body material, valve is sealed using hard, has built castable outside spool and in valve body.
5. the apparatus of claim 2, which is characterized in that the cyclone dust collectors (4) are designed using water cooling, cooling water Using softened water, softened water is heated while cooling down cyclone dust collectors (4), and the softened water after heating enters waste heat boiler (6) Economizer;
Or,
The cyclone dust collectors (4) are arranged to be insulated, and water-cooling jacket is not added.
6. the apparatus of claim 2, which is characterized in that the outlet of the cyclone dust collectors (4) is additionally provided with cold slag Machine (5) or module with the cold slag function of water cooling.
7. the apparatus of claim 2, which is characterized in that the lag cooler (5) uses cylinder type cold slag machine, lag cooler In be passed through softened water warm sludge cooled down, cyclone dust extractor water cooling set and explosion venting valve water-cooled jacket are entered after softened water heating, it is cold But the lime-ash after is transported away by conveyer.
8. the apparatus according to claim 1, which is characterized in that the waste heat boiler (6) uses explosion-proof vertical waste heat boiler, Waste heat boiler is the form of multitubular boiler.
9. the apparatus of claim 2, which is characterized in that the connecting tube of the spring explosion venting valve (15) is welded type water Cold set, water-cooled jacket, which divides among two layers, two layers inside and outside, is passed through softened water, softens water composite cooling pipe wall, enters waste heat boiler (6) after heating Oxygen-eliminating device.
10. a kind of dedusting side using such as the described in any item converter gas dry type waste heat recycling dust-extraction units of claim 1-9 Method, which is characterized in that including:
Flue gas enters cyclone dust collectors (4) by gasification cooling flue (2) from petticoat pipe and carries out rough dedusting;
Flue gas after rough dedusting enters waste heat boiler (6) and carries out waste heat recycling, wherein water carries out heat with flue gas and exchanges, water quilt The energy warms of flue gas release are reduced at saturated vapor, the temperature of flue gas;
Flue gas after heat exchange enters electric precipitator (8) and carries out refined dedusting;
By electric precipitator (8), treated that flue gas enters primary air fan (9);
Flue gas after primary air fan (9) enters diffusing tower (14) or enters gas change heater (13) or enter gas cooler (11);
Enter gas chamber (13) by gas change heater (12) or gas cooler (11) flue gas after cooling, wherein water and cigarette Gas carries out heat exchange, and the energy warms that water is discharged by flue gas are reduced at hot water, the temperature of flue gas.
CN201810642358.2A 2018-06-21 2018-06-21 A kind of converter gas dry type waste heat recycling dust-extraction unit and method Pending CN108823352A (en)

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CN109280736A (en) * 2018-11-30 2019-01-29 天津正元合科技开发有限公司 A kind of converter vaporization cooling new process
CN110184411A (en) * 2019-07-18 2019-08-30 无锡红旗除尘设备有限公司 The full dry cloth-bag dusting system of the energy-efficient ultra-clean discharge of flue gas of converter
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Application publication date: 20181116