CN104060026A - Flue gas cooling device used for dedusting in converter - Google Patents
Flue gas cooling device used for dedusting in converter Download PDFInfo
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- CN104060026A CN104060026A CN201310091115.1A CN201310091115A CN104060026A CN 104060026 A CN104060026 A CN 104060026A CN 201310091115 A CN201310091115 A CN 201310091115A CN 104060026 A CN104060026 A CN 104060026A
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- flue gas
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- 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
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Abstract
The invention relates to a flue gas cooling device used for dedusting in a converter, which relates to the flue gas cooling device, and the flue gas cooling device solves the problem of little flue gas amount processed by the current apparatus. The flue gas cooling device comprises an inlet pipeline, a cylindrical shell connected to the inlet pipeline, wherein the cylindrical shell is composed of a conical pipeline, a cylindrical pipeline and an inverted conical pipeline; a duplex nozzle apparatus placed in the inlet pipeline, wherein one water throughput circular ring and one steam throughput circular ring are arranged, the through holes with same quantity are arranged, the duplex nozzles have same through hole quantity on the water throughput circular ring and are placed on the water throughput circular ring, the center of each duplex nozzle is the nozzle, the duplex nozzle is communicated to the through hole on the water throughput circular ring, an opened steam outlet layer is arranged around the nozzle, and is communicated to one through hole on the throughput circular ring, the flowed steam enables atomization of water sprayed from the nozzle; an ash hopper which is a V-shaped pipe, wherein one end is connected to a lower pipeline, and the other end is a cooling flue gas outlet. The flue gas cooling device is capable of rapidly vaporizing and cooling flue gas with high efficiency, and has the advantages of energy saving and convenient maintenance.
Description
Technical field
The present invention relates to flue gas cooling device, refer in particular to a kind of flue gas cooling device for converter dust-removing.
Background technology
Converter can produce a large amount of high-temperature flue gas in smelting process, and the flue-gas temperature of being overflowed by converter mouth is about 1450 ℃, and flue gas mainly contains iron oxide dust and coal gas of converter, must it is cooling, dedusting, purification, and in addition recycling.Therefore a set of flue gas cooling device need be set, collect the high-temperature flue gas in converter steelmaking process and cooled down, to meet the requirement of next step dedusting and coal-gas recovering, guarantee the safety in production of converter steelmaking.In field of steel-making, coal gas of converter occupies major proportion as energy recovery recycling in Steelmaking with Minus Energy Consumption of Converter process, is conducive to reduce the production cost of converter steelmaking.
In traditional Wet Dust-trapping of Converter system, for the cooling device of flue gas, it is the monomer Venturi meter flue-gas-cooling system adopting as shown in Figure 1, it is to be connected to form by three sections of variform pipelines, be divided into from top to bottom collapsible tube 12, trunnion 13 and increaser 14, arrange a spray nozzle 11 at the mouth of pipe of collapsible tube 12.Its principle is that flue gas is entered by collapsible tube 12, and through trunnion 13, air-flow from the coarse to fine, to accelerate gas flow rate, make gas form " vacuum " district at the increaser 14 outlet rear sides of Venturi meter, and enter after the flue gas deceleration of increaser, also strengthened cooling performance.Owing to importing and exporting direction at pipeline, form certain pressure reduction, therefore, can pass through the adjusting to pipeline pressure, realized the flue gas flow that enters Venturi meter.Shrink the water spray of the nozzle 11 that the mouth of pipe arranges by piped water supply, flue gas is through the out-of-date spray that is subject to recirculated water nozzle, thereby realizes the cooling effect of flue gas, and meanwhile, oarse-grained dust is met water and formed mud, has played the effect of initial dedusting.This device has that to take up an area space little, can flexible pipeline pressure, flue gas flow, and using water as heat-eliminating medium, played the effect of quick cooled flue gas and thick dedusting.But the spray nozzle water loss in this structure is many, water circulation use rate is lower, is unfavorable for save energy; The mud contamination environment that thick dedusting forms, intractability is larger, is unfavorable for the requirement of cleaner production; In addition, because the amount of monomer Venturi meter smoke treatment is less, often need to be arranged side by side a casing of a plurality of Venturi meters composition and process, the difficulty that this has not only increased construction and has safeguarded, has also increased cost.
Summary of the invention
The object of the invention is the problem existing in order to overcome prior art, provide a kind of in save energy, can reclaim efficiently the flue gas cooling device for converter dust-removing of available energy.
The object of the invention is to be achieved through the following technical solutions:
A flue gas cooling device for converter dust-removing, is characterized in that: described flue gas cooling device is a kind of evaporative cooler, is installed between the gasification cooling flue and electrostatic precipitator of converter dry gas cleaning system, and it comprises:
Inlet duct, is a cylindrical pipe, and its top is connected with the gasification cooling flue of converter dry gas cleaning system, and high-temperature flue gas enters thus;
Cylindrical shell, by three segment pipes, connected to form, upper pipeline is up-small and down-big cone-shaped pipe, main pipeline is cylindrical pipe, lower pipeline is up big and down small turbination pipeline, wherein go up the bottom of pipeline and the top of main pipeline is connected and fixed, the lower top of pipeline and the base portion of main pipeline are connected and fixed; The top of upper pipeline and the bottom of described inlet duct are connected and fixed;
Duplex nozzel device, is placed in described inlet duct its structure: a water flowing annulus, and respectively there is an outlet pass left and right, and each outlet pass connects a water inlet pipe; A logical steam annulus, respectively there is a logical steam port left and right, and each logical steam port connects one and enters vapour pipe; Described water flowing annulus together with logical steam annulus juxtaposition and respectively two water inlet pipes by separately and two enters vapour pipe and is fixed on inlet duct inwall, two water inlet pipes and two enter vapour pipe pass respectively inlet duct outer wall each be connected with vapour pipe with the water pipe that is placed in inlet duct both sides, water pipe connects water source by water regulating valve, vapour pipe connects vapour source by quantity of steam variable valve, and described water regulating valve is connected respectively a controller with quantity of steam variable valve; Described water flowing annulus and logical steam annulus are provided with the identical and equally distributed several through hole of quantity; There is the duplex nozzel that several quantity is identical with via count on each water flowing annulus, be evenly arranged on the circumference of water flowing annulus and logical steam annulus, the center of each duplex nozzel is the nozzle that is provided with a plurality of spout holes, nozzle is communicated with a through hole corresponding on water flowing annulus, the periphery of nozzle is the vapour outlet layer of one deck opening, vapour outlet layer is communicated with a through hole corresponding on steam annulus, and the steam that this vapour outlet laminar flow goes out makes the water atomization of nozzle ejection;
Ash bucket, is a V-arrangement pipe, and one end of V-arrangement pipe is connected with the bottom of described lower pipeline, and the other end is cooling exhanst gas outlet, and it is connected with electrostatic precipitator by flue.
Described duplex nozzel has 24.
The air isolation layer of one deck sealing is also set between the vapour outlet layer of described nozzle and nozzle.
Described ash bucket bottom configures the chain conveyor of defeated ash, and bottom arranges the urgent ash discharging hole of accident.
Described inlet duct cooling smoke outlet interior and ash bucket has been installed respectively entrance thermopair and exit thermocouple, and described entrance thermopair is connected respectively described controller with exit thermocouple.
The cooling smoke outlet of described ash bucket is also installed a flue gas flow detector, and described flue gas flow detector connects described controller.
Beneficial effect of the present invention:
The present invention utilizes the cooling mode of vaporization to process high-temperature flue gas, so as to the steam of atomization, realizes the cooling object of flue gas, carries out thick dedusting on cooling basis.The cooling advantage of vaporizing is a large amount of saving water resources, fundamentally solves the problem that water loss is many.Secondly, the cooling evaporation of water latent heat that utilizes of vaporizing carrys out cooled flue gas, the water cooling of efficiency ratio tradition is more efficient, the cooling dust granules cinder of flue gas can be carried or directly by ash bucket, be discharged by bottom chain through ash bucket, dry dust can recycling, do not produce sewage and mud, alleviated the intractability of the mud of traditional water-cooled formation
Because equipment adopts the cooling mode of vaporization, by utilizing the spray of water smoke and the latent heat of water evaporation to carry out cooled flue gas, higher than traditional water-cooled efficiency, ton steel water drops to 150Kg left and right by 230Kg, thereby has saved great lot of water resources, has improved energy utilization rate.The water vapor of atomization adds wet dust, and forming cinder can be recycled, and the treatment of mud difficulty producing than water-cooled has more greatly advantage, has really realized green reclaim.The result of use of slave unit sees, the present invention can realize fast, high-efficient gasification cooled flue gas, the significantly design objective of save energy, and failure rate is low, and system run all right, easy to maintenance.
For further illustrating above-mentioned purpose of the present invention, constructional feature and effect, below with reference to accompanying drawing, the present invention is described in detail.
Accompanying drawing explanation
Fig. 1 is existing monomer Venturi meter flue-gas-cooling system structural representation;
Fig. 2 is that the present invention is for the flue gas cooling device structural representation of converter dust-removing;
Fig. 3 is the structural representation of duplex nozzel device in Fig. 2;
Fig. 4 is the structural representation of each duplex nozzel in Fig. 3.
Embodiment
Accompanying drawing below in conjunction with embodiment is elaborated to the specific embodiment of the present invention.
Referring to Fig. 2, the present invention is a kind of evaporative cooler for the flue gas cooling device of converter dust-removing, it is installed between the gasification cooling flue and electrostatic precipitator of converter dry gas cleaning system, and its Main Function is further to reduce converter gas temperature and separated meal dirt.This evaporative cooler comprises:
Inlet duct 21, is a cylindrical pipe, and its top is connected with the gasification cooling flue (not shown) of converter dry gas cleaning system, and high-temperature flue gas enters thus;
Cylindrical shell 24, it is connected to form by three segment pipes, upper pipeline 241 is up-small and down-big cone-shaped pipes, main pipeline 242 is cylindrical pipes, lower pipeline 243 is up big and down small turbination pipelines, wherein go up the bottom of pipeline 241 and the top of main pipeline 242 is connected and fixed, the base portion of the top of lower pipeline 243 and main pipeline 242 is connected and fixed; The bottom of the top of upper pipeline 241 and inlet duct 21 is connected and fixed;
Duplex nozzel device 23, it is placed in inlet duct 21, as shown in Figure 3, and its structure: solid line annulus in a water flowing annulus 31(Fig. 3), respectively there is an outlet pass 311 left and right, each outlet pass 311 connects a water inlet pipe 312, dotted circle in a logical steam annulus 32(Fig. 3), respectively there is a logical steam port 321 left and right, and each logical steam port 321 connects one and enters vapour pipe 322, described water flowing annulus 31 together with logical steam annulus 32 juxtapositions and respectively two water inlet pipes 312 by separately and two enters vapour pipe 322 and is fixed on inlet duct 21 inwalls, two water inlet pipes 312 and two enter vapour pipe 322 pass respectively inlet duct 21 outer wall each be connected with vapour pipe with the water pipe that is placed in inlet duct 21 both sides, water pipe connects water source by water regulating valve (not shown), and vapour pipe connects vapour source by quantity of steam variable valve (not shown), described water flowing annulus 31 and logical steam annulus 32 are provided with the identical and equally distributed several through hole of quantity, having duplex nozzel 33(Fig. 3 embodiment that several quantity is identical with via count on each water flowing annulus 31 is 1#-24# totally 24 duplex nozzels 33), be evenly arranged on the circumference of water flowing annulus 31 and logical steam annulus 32, the structure of each duplex nozzel 33 is referring to Fig. 4, its center is the nozzle 41 that is provided with a plurality of spout holes, nozzle 41 is communicated with a through hole corresponding on water flowing annulus 31, the periphery of nozzle is bilayer structure, skin is vapour outlet layer 43, it is opening layer, internal layer is air isolation layer 42, it is sealer coat, vapour outlet layer 43 is communicated with a through hole corresponding on steam annulus 32.During operation, when high-temperature flue gas enters inlet duct 21, water coolant is from spout hole 41 ejections of nozzle center, vapour outlet layer 43 around spout hole 41 outer rings sprays steam simultaneously, make water coolant atomization, the vapo(u)r blasting amount of the injection flow rate of spout hole 41, vapour outlet layer 43 changes and is automatically adjusted by a controller with flue gas heat content.Between spout hole 41 and vapour outlet layer 43, utilize air isolation layer 42 isolation, the different heat expansion of avoiding two kinds of different media temperature to cause affects to steam and is condensed.Described water regulating valve is connected respectively a controller (not shown) with quantity of steam variable valve.
Ash bucket 25, it is a V-arrangement pipe, one end of V-arrangement pipe and described cylindrical shell 24 bottoms (bottom of lower pipeline 243) are connected and fixed, the other end is cooling exhanst gas outlet, it is connected with electrostatic precipitator (not shown) by flue, ash bucket 25 bottoms configure the chain conveyor (not shown) of defeated ash, and bottom arranges the urgent ash discharging hole 251 of accident.
When in this device, high-temperature flue gas enters cylindrical shell 24 by inlet duct 21, because cross section becomes large, flue gas flow rate is reduced, at inlet duct 21, be subject to the water smoke effect of duplex nozzel device 23, make exhaust gas dust by humidification, cylindrical shell 24 provides enough spaces for flue gas is cooling, meet the cooling requirement with humidification flue dust of flue gas.In addition, the effect of 24 times pipelines 243 of cylindrical shell is that the flue dust of humidification is easily fallen to ash bucket 25 bottoms with gravity, make part crude particle dust rely on self gravitation to separate from flue gas, be deposited to ash bucket 25 bottoms, by chain conveyor, export dust, and will do further recycling.The urgent ash discharging hole 251 of accident that ash bucket below arranges is that assurance cinder is discharged smoothly, can the normal operation of stabilizing equipment under abnormal conditions.
In addition, the discontinuity of converter smelting operation can cause the variation of flue-gas temperature and volume very fast, requires dynamically to control exhanst gas outlet temperature and the flue gas flow of this device, meets follow-up electric precipitator job requirement.Therefore, in the inlet duct 21 of high-temperature flue gas entry and the cooling smoke outlet of ash bucket 25 entrance thermopair 21 and exit thermocouple 26 have been installed respectively, at the cooling smoke outlet of ash bucket 25, a flue gas flow detector (not shown) is also installed, measure respectively the flue gas turnover flue-gas temperature at two ends and the flue gas flow of exit end, the signal that the signal of two thermopair outputs of entrance and outlet and flue gas flow detector detect is delivered to respectively described controller (not shown), by controller according to these signals, control water regulating valve and quantity of steam variable valve, to control jet of water amount and the vapo(u)r blasting amount in duplex nozzel device 23, reach the injection flow rate of spout hole 41, the vapo(u)r blasting amount of vapour outlet layer 43 changes the object being automatically adjusted by controller with flue gas heat content.Temperature out is directly proportional to the amount of heat that flue gas is brought evaporative cooler into, therefore, can realize and provide mired to regulate to injection flow rate by the setting to temperature out index, make like this exhanst gas outlet temperature both meet follow-up equipment requirement, make again not excessive moisture (excessive moisture can be carried and bring fault to cinder) of the cinder that forms.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for object of the present invention is described, and not as limitation of the invention, as long as in essential scope of the present invention, the variation of the above embodiment, modification all will be dropped in the scope of claim of the present invention.
Claims (6)
1. for a flue gas cooling device for converter dust-removing, it is characterized in that: described flue gas cooling device is a kind of evaporative cooler, be installed between the gasification cooling flue and electrostatic precipitator of converter dry gas cleaning system, it comprises:
Inlet duct, is a cylindrical pipe, and its top is connected with the gasification cooling flue of converter dry gas cleaning system, and high-temperature flue gas enters thus;
Cylindrical shell, by three segment pipes, connected to form, upper pipeline is up-small and down-big cone-shaped pipe, main pipeline is cylindrical pipe, lower pipeline is up big and down small turbination pipeline, wherein go up the bottom of pipeline and the top of main pipeline is connected and fixed, the lower top of pipeline and the base portion of main pipeline are connected and fixed; The top of upper pipeline and the bottom of described inlet duct are connected and fixed;
Duplex nozzel device, is placed in described inlet duct its structure: a water flowing annulus, and respectively there is an outlet pass left and right, and each outlet pass connects a water inlet pipe; A logical steam annulus, respectively there is a logical steam port left and right, and each logical steam port connects one and enters vapour pipe; Described water flowing annulus together with logical steam annulus juxtaposition and respectively two water inlet pipes by separately and two enters vapour pipe and is fixed on inlet duct inwall, two water inlet pipes and two enter vapour pipe pass respectively inlet duct outer wall each be connected with vapour pipe with the water pipe that is placed in inlet duct both sides, water pipe connects water source by water regulating valve, vapour pipe connects vapour source by quantity of steam variable valve, and described water regulating valve is connected respectively a controller with quantity of steam variable valve; Described water flowing annulus and logical steam annulus are provided with the identical and equally distributed several through hole of quantity; There is the duplex nozzel that several quantity is identical with via count on each water flowing annulus, be evenly arranged on the circumference of water flowing annulus and logical steam annulus, the center of each duplex nozzel is the nozzle that is provided with a plurality of spout holes, nozzle is communicated with a through hole corresponding on water flowing annulus, the periphery of nozzle is the vapour outlet layer of one deck opening, vapour outlet layer is communicated with a through hole corresponding on steam annulus, and the steam that this vapour outlet laminar flow goes out makes the water atomization of nozzle ejection;
Ash bucket, is a V-arrangement pipe, and one end of V-arrangement pipe is connected with the bottom of described lower pipeline, and the other end is cooling exhanst gas outlet, and it is connected with electrostatic precipitator by flue.
2. the flue gas cooling device for converter dust-removing as claimed in claim 1, is characterized in that:
Described duplex nozzel has 24.
3. the flue gas cooling device for converter dust-removing as claimed in claim 1, is characterized in that:
The air isolation layer of one deck sealing is also set between the vapour outlet layer of described nozzle and nozzle.
4. the flue gas cooling device for converter dust-removing as claimed in claim 1, is characterized in that:
Described ash bucket bottom configures the chain conveyor of defeated ash, and bottom arranges the urgent ash discharging hole of accident.
5. the flue gas cooling device for converter dust-removing as claimed in claim 1, is characterized in that:
Described inlet duct cooling smoke outlet interior and ash bucket has been installed respectively entrance thermopair and exit thermocouple, and described entrance thermopair is connected respectively described controller with exit thermocouple.
6. the flue gas cooling device for converter dust-removing as claimed in claim 1, is characterized in that:
The cooling smoke outlet of described ash bucket is also installed a flue gas flow detector, and described flue gas flow detector connects described controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310091115.1A CN104060026A (en) | 2013-03-21 | 2013-03-21 | Flue gas cooling device used for dedusting in converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310091115.1A CN104060026A (en) | 2013-03-21 | 2013-03-21 | Flue gas cooling device used for dedusting in converter |
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| CN104060026A true CN104060026A (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310091115.1A Pending CN104060026A (en) | 2013-03-21 | 2013-03-21 | Flue gas cooling device used for dedusting in converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911298A (en) * | 2015-06-30 | 2015-09-16 | 中冶南方工程技术有限公司 | Anti-scaling evaporative cooling equipment for primary dust removal of converter |
| CN105648139A (en) * | 2016-01-18 | 2016-06-08 | 邢台市富爱雾化器有限公司 | Converter gas cooling and pressure atomization device and technology |
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| CN102899444A (en) * | 2012-10-26 | 2013-01-30 | 通化市五一环保科技股份有限公司 | System and method for treating converter flue gas |
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| JP2004323868A (en) * | 2003-04-21 | 2004-11-18 | Nippon Steel Corp | Facility for treating waste gas of metallurgical furnace |
| CN101358263A (en) * | 2007-08-01 | 2009-02-04 | 山东省冶金设计院有限责任公司 | Converter gas cooling and purification method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104911298A (en) * | 2015-06-30 | 2015-09-16 | 中冶南方工程技术有限公司 | Anti-scaling evaporative cooling equipment for primary dust removal of converter |
| CN105648139A (en) * | 2016-01-18 | 2016-06-08 | 邢台市富爱雾化器有限公司 | Converter gas cooling and pressure atomization device and technology |
| CN105648139B (en) * | 2016-01-18 | 2017-07-18 | 邢台市富爱雾化器有限公司 | A kind of coal gas of converter cooling pressure atomizing device and technique |
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Application publication date: 20140924 |