CN100595286C - Solution dehumidification blast furnace blast device and method - Google Patents
Solution dehumidification blast furnace blast device and method Download PDFInfo
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- CN100595286C CN100595286C CN200810020657A CN200810020657A CN100595286C CN 100595286 C CN100595286 C CN 100595286C CN 200810020657 A CN200810020657 A CN 200810020657A CN 200810020657 A CN200810020657 A CN 200810020657A CN 100595286 C CN100595286 C CN 100595286C
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Abstract
The solution dehumidification blast furnace blasting device and method directly process blast furnace air to needed humidity scope with dehumidification salt solution, the device is a new energy-saving blasting system using solution dehumidification technology to meet the requirement of blast furnace humidity and using self waste heat of blast furnace to regenerating solution. The system is mainlycomposed of solution dehumidification system, solution regenerating system using self waste heat of blast furnace and solution pipeline system, mainly consists of solution dehumidifier, waste heat solution regenerating system, smoke heat collector, filter, blower, defogger, heat exchanger, solution storing barrel, etc. The system heats solution with smoke heat collector or directly provides heatsource for the regenerating system with the hot waste gas discharged by blast furnace, which meets the regenerating requirement of solution dehumidification system, thereby providing a new blast furnace dehumidification blasting method and device which employ the self waste heat of blast furnace calcining system.
Description
Technical field
The present invention relates to a kind of novel solutions moisture-removing blast furnace blowing method and apparatus, belong to the dehumidifying Blast Technology on BF field.
Background technology
The humidity of atmospheric blast is to the influence of blast-furnace smelting, as far back as the attention that just is subjected to the smelting iron and steel staff in the middle of the 19th century.Along with the development of high wind-warm syndrome, big air quantity, rich-oxygen of blast furnace big coal injection amount technology, dehumidified blast becomes a kind of indispensable technology in the blast-furnace smelting.Now, coal sprays on the bigger iron-smelting blast furnace, for strengthening smelting, substantially all adopts the dehumidified blast technology.
Current, the dehumidification method that the dehumidified blast technology adopts is cooling and dehumidifying mostly.This dehumidification is reduced to the atmospheric blast after filtering below the dew-point temperature earlier, and the moisture in the atmosphere is come out from the surface cooler surface condensation, and air blast is met the demands wet the branch.If take the mode of the preceding cooling of blower fan dehumidification, because the reduction of air themperature makes the volume of air of equal in quality reduce, can save a part of blower fan power consumption, can offset the energy that a part of refrigerator consumes.Common cooling type of drive has two kinds: one, utilize the driven by power mechanical refrigerator to lower the temperature; Two, utilize heat drive absorptionmachine refrigeration cool-down common in the iron work.The former needs extra electric power, on certain degree, has expended unnecessary energy; And the latter can make full use of waste heat used heat.But the both is reduced to blast temperature below the dew-point temperature, and the cooling after atmospheric blast need be reheated to about 1050 ℃, even higher after blast blast furnace, this has aggravated the loss of energy undoubtedly.
The present invention adopts the dehumidification method of solution dehumidification to carry out air blow for removing moisture, can make full use of the waste heat used heat that blast furnace produces, and is a kind of novel air blow for removing moisture method.And the temperature of the air blast after dehumidifying can great changes will take place, the energy waste problem of having avoided cooling and dehumidifying cold and heat again to offset.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of novel blast furnace blast dehumidifying device---solution moisture-removing blast furnace blowing device.This dehumidified blast device is based on the solution dehumidification technology, system architecture is simple, the waste heat used heat that utilizes blast furnace self to produce drives, the problem of having avoided cooling and dehumidifying cold and heat again to offset, system's energy utilization rate is higher, can satisfy the requirement of the wet branch of blast furnace blast, realize reliable blast furnace dehumidifying air blast.
Technical scheme: the solution moisture-removing blast furnace blowing method and apparatus is based upon on the salts solution dehumidifying technology basis, and solution dehumidification agent commonly used has lithium-bromide solution, lithium chloride solution and calcium chloride solution or the like.In the dehumidification process, the pressure reduction between the steam partial pressure of air blast and the surface vapor pressure of solution be moisture from the motivating force of air blast to the solution diffusion mass transfer, and the limit that dehumidification can reach depends on that dehumidification carries out the vapor-liquid equilibrium relationship under the condition.For dehumidification solution, its surface vapor pressure is the function of concentration and temperature, concentration, the ability that temperature can be adjusted its moisture absorption by control solution in the dehumidification process.Behind a large amount of absorption moisture, the concentration of solution is thinning, and its dehumidification ability also descends thereupon, in order to realize the successive dehumidification, need make solution to reuse the dilute solution thermal regeneration.
The present invention adopt after the regeneration strong solution with the dehumidifying after dilute solution blended method, by regulating both flow proportionals, the concentration of regulating and controlling moisture trap import dehumidification solution, guarantee needed MASS TRANSFER POTENTIAL, thereby the water capacity of blast furnace blast is controlled within the desired scope, satisfies blast furnace blast the wet requirement that divides.In the dehumidification process, need not, do not need to consume the tradition cooling dehumidification needed electric energy of lowering the temperature fully air blast cooling, and the power loss problem of having avoided cooling cold and heat again to offset.
Solution moisture-removing blast furnace blowing device provided by the present invention heats dilute solution by the flue gas heat collector, in used heat solution regeneration system and the exchange of ambient air generation caloic, realizes the regeneration of solution side thermal source then; Perhaps directly dilute solution is sent into the used heat solution regeneration system and directly contacted the regeneration of realization air side thermal source with blast furnace flue gas (as the waste gas of hotblast stove).These two kinds of solution regenerations can be turned waste into wealth, and the blast furnace that makes full use of Steel Plant is tempered used heat, improves the utilization of Steel Plant's used heat energy.
Structure of the present invention is: in the dehumidification processing links, the outlet of strainer links to each other with blower fan by airduct, and the blower fan outlet communicates with the moisture trap blast entrance, and moisture trap air and mist eliminator are connected.Dehumidification processing links and solution regeneration link are tied through moisture trap.Solution regeneration link, moisture trap taphole and dilute solution liquid storing barrel join, a dilute solution liquid storing barrel outlet minute two-way, the one tunnel communicates with strong solution liquid storing barrel export pipeline, and another road is connected with the dilute solution pump; The dilute solution pump the other end and heat exchanger join, and the outlet of heat exchanger dilute solution is divided into two-way, and one the road joins with the used heat solution regeneration system through the flue gas heat collector earlier again, and another road directly communicates with the used heat solution regeneration system through variable valve; The outlet of used heat solution regeneration system strong solution is joined with the import of heat exchanger strong solution, and the strong solution outlet communicates with the strong solution liquid storing barrel, and the other end of strong solution liquid storing barrel links to each other with the strong solution pump through threeway with one road pipeline of dilute solution liquid storing barrel outlet; The strong solution pump outlet communicates with water cooler, and the other end of water cooler is connected with moisture trap strong solution inlet.
The solution regeneration method of solution moisture-removing blast furnace blowing device is realized two kinds of solution regeneration methods: the dilute solution after the dehumidifying flows into the dilute solution liquid storing barrel from moisture trap, through behind the dilute solution pump pressure-raising with regeneration after strong solution in heat exchanger after the heat exchange, in the flue gas heat collector, heated on the one hand by the blast furnace waste heat flue gas of iron work, promote and send into after its surperficial vapour pressure in the used heat solution regeneration system and the exchange of ambient air generation caloic, realize the regeneration of solution side thermal source solution; Send into the used heat solution regeneration system on the other hand, direct and blast furnace flue gas generation caloic exchange realizes the regeneration of air side thermal source solution.
Beneficial effect; Beneficial effect of the present invention has:
(1) the invention provides a kind of novel blast furnace dehumidifying air-blast device, chief component is a dehumidification solution loop, comprises solution dehumidification link and solution regeneration link, and structure is simpler.
(2) the present invention controls its dehumidification ability by regulator solution concentration, has reduced the wet branch of air blast, has reduced coke ratio, has stablized conditions of blast furnace, thereby has reduced the blast furnace cost.
(3) the present invention does not need temperature with air blast to be reduced to it to carry out dehumidification below dew-point temperature, thereby has improved the dehumidifying vaporization temperature, reduces energy expenditure.
(4) the invention provides two kinds of dehumidification solution regenerated methods, the waste heat used heat that utilizes blast furnace self to produce drives air blow for removing moisture, turns waste into wealth, and has made full use of blast furnace waste heat used heat.
Description of drawings
Fig. 1 is a structural representation of the present invention.Wherein have: strainer 1; Blower fan 2; Moisture trap 3; Mist eliminator 4; Dilute solution liquid storing barrel 5; Heat exchanger 6; Flue gas heat collector 7; Used heat solution regeneration system 8; Strong solution liquid storing barrel 9; Water cooler 10; Solution pump 11,12; Valve 13-19.
Embodiment
Solution moisture-removing blast furnace blowing device provided by the invention be adopt the solution dehumidification technology to satisfy the blast furnace blast humidity requirement and and utilize a kind of novel energy-conserving air-blast system of blast furnace self used heat regeneration soln.In the dehumidification processing links, the outlet of strainer 1 links to each other with blower fan 2 by airduct, and blower fan 2 outlets communicate with moisture trap 3 blast entrances, and moisture trap 3 airs and mist eliminator 4 are connected.Dehumidification processing links and solution regeneration link are tied through moisture trap 3.Solution regeneration link, the outlet of moisture trap 3 dilute solutions is joined with dilute solution liquid storing barrel 5, and 5 outlets of dilute solution liquid storing barrel divide two-way, and one the tunnel communicates with strong solution liquid storing barrel 9 export pipelines, and another road is connected with solution pump 12; Solution pump 12 the other ends and heat exchanger 6 join, and the outlet of heat exchanger 6 dilute solutions is divided into two-way, and one the road joins with used heat solution regeneration system 8 through flue gas heat collector 7 earlier again, and another road directly communicates with used heat solution regeneration system 8 through variable valve 17; The outlet of used heat solution regeneration system 8 strong solutions is joined with heat exchanger 6 strong solution imports, the outlet of heat exchanger 6 strong solutions communicates with strong solution liquid storing barrel 9, and the other end of strong solution liquid storing barrel 9 links to each other with solution pump 11 through threeway with one road pipeline of dilute solution liquid storing barrel 5 outlets; The outlet of solution pump 11 communicates with water cooler 10, and the other end of water cooler 10 is connected with moisture trap 3 strong solutions inlet.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810020657A CN100595286C (en) | 2008-02-19 | 2008-02-19 | Solution dehumidification blast furnace blast device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810020657A CN100595286C (en) | 2008-02-19 | 2008-02-19 | Solution dehumidification blast furnace blast device and method |
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| Publication Number | Publication Date |
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| CN101240358A CN101240358A (en) | 2008-08-13 |
| CN100595286C true CN100595286C (en) | 2010-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810020657A Expired - Fee Related CN100595286C (en) | 2008-02-19 | 2008-02-19 | Solution dehumidification blast furnace blast device and method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101537303B (en) * | 2009-03-18 | 2011-11-09 | 安徽工业大学 | Solution dehumidification device driven by low-temperature smoke gas |
| CN102367497A (en) * | 2011-11-01 | 2012-03-07 | 杭州哲达科技股份有限公司 | Blast furnace blowing energy-saving and efficiency-enhancing integration technology |
| CN107083465B (en) * | 2017-04-26 | 2019-01-25 | 中冶南方工程技术有限公司 | Process system for blast dehumidification using waste heat of hot blast stove flue gas |
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- 2008-02-19 CN CN200810020657A patent/CN100595286C/en not_active Expired - Fee Related
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| CN101240358A (en) | 2008-08-13 |
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Granted publication date: 20100324 Termination date: 20140219 |