CN201621973U - Electric furnace flue gas waste heat recovery utilization device - Google Patents

Electric furnace flue gas waste heat recovery utilization device Download PDF

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Publication number
CN201621973U
CN201621973U CN2010201176696U CN201020117669U CN201621973U CN 201621973 U CN201621973 U CN 201621973U CN 2010201176696 U CN2010201176696 U CN 2010201176696U CN 201020117669 U CN201020117669 U CN 201020117669U CN 201621973 U CN201621973 U CN 201621973U
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CN
China
Prior art keywords
steel scrap
flue gas
electric furnace
waste heat
preheating channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN2010201176696U
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Chinese (zh)
Inventor
侯祥松
孙明庆
董茂林
姜小萍
张茂
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CISDI Engineering Co Ltd
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CISDI Engineering Co Ltd
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Publication date
Application filed by CISDI Engineering Co Ltd filed Critical CISDI Engineering Co Ltd
Priority to CN2010201176696U priority Critical patent/CN201621973U/en
Application granted granted Critical
Publication of CN201621973U publication Critical patent/CN201621973U/en
Anticipated expiration legal-status Critical
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    • 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
    • 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
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Abstract

The utility model discloses an electric furnace flue gas waste heat recovery utilization device, which comprises a steel scrap preheating channel (3) connected with an electric furnace (1) through a feeding device (2), wherein a steel scrap feeding machine (4) is arranged on the steel scrap preheating channel (3), a channel driving device (5) for conveying steel scrap is arranged in the interior of the steel scrap preheating channel (3), one or more induced draft grooves (6) and a main chimney flue (8) connected with pipelines at the lower parts of the induced draft grooves (6) are arranged at the bottom of the steel scrap preheating channel (3), and a waste heat boiler (9) and a dust remover (11) are connected behind the main chimney flue (8). The utility model adopts a way that an electric furnace flue gas penetrates through a steel scrap layer, the heating efficiency of the electric furnace flue gas to the steel scrap is improved, the preheating temperature of the steel scrap is further increased to more than 500 DEG C, and the heat exchange efficiency of the flue gas and the steel scrap is improved.

Description

A kind of electric furnace flue gas heat recovery device
Technical field
The utility model relates to a kind of heat recovery device, relates in particular to a kind of electric furnace flue gas heat recovery device, is used for the heat recovery of big-and-middle-sized electric furnace flue gas.
Background technology
The short flow process steel-smelting technology of electric furnace is one of most important steel-smelting technology, and development is very fast at home.When utilizing electric furnace steel making, the heat that electric furnace flue gas is taken away is about 20% of electric furnace total energy consumption, recycles the heat of electric furnace flue gas and has great potentialities and can dig.At present, the electric furnace flue gas heat recovery technology also is in developing stage, and the mode of flue gas waste heat recovery utilization mainly contains and utilize the electric furnace flue gas preheating scrap, utilizes waste heat boiler to produce steam etc.
Utilize the electric furnace flue gas preheating scrap, improve and go into stove steel scrap temperature, can reduce energy consumption of electric furnace, shorten the electric furnace smelting time.The steel scrap charger joins steel scrap in the scrap preheater, and the steel scrap of process preheating is transferred in the electric furnace by the drives of scrap preheater inside.Because high-temperature flue gas flows into from an end, the other end flows out, and steel scrap is heated, because flue gas only flows through outside the steel scrap layer, to steel scrap layer inside to add thermal effect relatively poor, cause the mean temperature of steel scrap preheating lower, what have only is about 200 ℃, can not make full use of the waste heat of electric furnace flue gas.This kind electric furnace flue gas steel scrap use device heat exchange efficiency is low, and after the steel scrap preheating, the temperature of flue gas is still higher.
Utilize waste heat boiler can reclaim more heat from electric furnace flue gas, but utilize waste heat boiler can only produce the steam of low parameter, UTILIZATION OF VESIDUAL HEAT IN efficient is lower; In order to improve the heat exchange efficiency of waste heat boiler, adopt heat pipe waste heat boiler usually, and the inlet temperature of electric furnace flue gas reaches as high as more than 1400 ℃, well beyond the serviceability temperature scope of conventional heat pipe, influenced heat pipe service life.
The utility model content
The purpose of this utility model provides a kind of flue gas and the higher electric furnace flue gas heat recovery device of steel scrap heat exchange efficiency.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of electric furnace flue gas heat recovery device, comprise the steel scrap preheating channel that links to each other with electric furnace by charging gear, the steel scrap preheating channel is provided with the steel scrap charger, the inside of steel scrap preheating channel is provided with the drives that steel scrap is carried, and it is characterized in that: the flue collector that the bottom of described steel scrap preheating channel is provided with one or more air inducing grooves and links to each other with air inducing groove lower pipeline.
In order further to utilize flue gas, be connected with waste heat boiler behind the described flue collector.
Described waste heat boiler is waterpipe type waste heat boiler and/or heat pipe waste heat boiler.
For flue gas is carried out dust removal process, be connected with deduster behind the described waste heat boiler.
In order to regulate the exhaust gas volumn that penetrates the different parts steel scrap bed of material, the pipeline of described air inducing groove bottom is provided with the flue gas flow control valve.
The utility model beneficial effect:
(1) adopts electric furnace flue gas to penetrate the mode of steel scrap layer, improved the efficiency of heating surface of electric furnace flue gas, and then improved the preheat temperature of steel scrap, can reach more than 500 ℃, improved the efficient of flue gas and steel scrap heat exchange steel scrap.
(2) make full use of the waste heat of electric furnace flue gas, be respectively applied for steel scrap preheating and waste heat boiler and produce steam, meet the requirement of heat recovery " by matter with energy, cascade utilization ", improved the service efficiency of electric furnace flue gas waste heat.
(3) because flue gas is used to heat steel scrap earlier, the initial temperature when flue gas enters waste heat boiler reduces, and meets the temperature range of conventional heat pipe boiler, the service life that helps improving heat pipe boiler.
(4) by the ratio of flue gas flow control valve adjusting steel scrap preheating channel and waste heat boiler waste heat recovery, has adjusting function preferably.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Among the figure:
Part 1 is an electric furnace; Part 2 is a charging gear; Part 3 is the steel scrap preheating channel; Part 4 is the steel scrap charger; Part 5 is a drives; Part 6 is the air inducing groove; Part 7 is the flue gas flow control valve; Part 8 is a flue collector; Part 9 is a waste heat boiler; Part 10 is a drum; Part 11 is a deduster; Part 12 is an air-introduced machine; Part 13 is a chimney.
The specific embodiment
Below in conjunction with accompanying drawing and specific embodiment of the utility model the utility model is further described:
As shown in Figure 1: a kind of electric furnace flue gas heat recovery device comprises the steel scrap preheating channel 3 that links to each other with electric furnace 1 by charging gear 2, the flue collector 8 that the bottom of steel scrap preheating channel 3 is provided with air inducing groove 6 and links to each other with air inducing groove 6 lower pipeline.The pipeline of air inducing groove 6 bottoms is provided with flue gas flow control valve 7, and the top of steel scrap preheating channel 3 is provided with steel scrap charger 4, and steel scrap preheating channel 3 links to each other with drives 5.Be connected with waste heat boiler 9, deduster 11, air-introduced machine 12 and the chimney 13 that has drum 10 by pipeline successively behind the flue collector 8.
The front end of steel scrap preheating channel 3 is connected with electric furnace 1 burner hearth by charging gear 2, steel scrap enters steel scrap preheating channel 3 from the steel scrap charger 4 that is positioned at steel scrap preheating channel 3 afterbodys, and in motion in steel scrap preheating channel 3 under the effect of drives 5, the steel scrap after the preheating enters electric furnace 1 by charging gear 2 and smelts.The flue gas of electric furnace 1 charging gear 2 of flowing through is sent into steel scrap preheating channel 3 from burner hearth, and flows through in steel scrap preheating channel 3, the heating steel scrap.In the bottom of steel scrap preheating channel 3 air inducing groove 6 is set, flue gas penetrates the steel scrap layer from top to bottom and flows out from air inducing groove 6, among the embodiment, air inducing groove 6 is divided into 5 sections, the pipeline of air inducing groove 6 bottoms joins with flue collector 8 respectively, be respectively arranged with 1 cover flue gas flow control valve 7 on the pipeline of air inducing groove 6 bottoms, when system moves, can regulate the exhaust gas volumn that penetrate the different parts steel scrap bed of material by regulating flue gas flow control valve 7.The flue gas of drawing from the air inducing groove is pooled to the flue collector 8, enters waste heat boiler 9 then.Waste heat boiler 9 adopts the form of waterpipe type waste heat boiler or heat pipe waste heat boiler, the also form that can adopt waterpipe type waste heat boiler and heat pipe waste heat boiler to combine.In waste heat boiler 9, after separating, the steam that waste heat boiler 9 utilizes the waste heat of flue gas to produce send vapour system in drum 10, and the temperature of flue gas further reduces, and flow through then deduster 11 and air-introduced machine 12 are discharged from chimney 13 at last.
Below reach embodiment in conjunction with the accompanying drawings the utility model has been done detailed description, but do not constitute, drop on any change and distortion in the claim scope, all be subjected to protection of the present utility model restriction of the present utility model.

Claims (3)

1. electric furnace flue gas heat recovery device, comprise the steel scrap preheating channel (3) that links to each other with electric furnace (1) by charging gear (2), steel scrap preheating channel (3) is provided with steel scrap charger (4), the inside of steel scrap preheating channel (3) is provided with the drives (5) that steel scrap is carried, it is characterized in that: the flue collector (8) that the bottom of described steel scrap preheating channel (3) is provided with one or more air inducing grooves (6) and links to each other with air inducing groove (6) lower pipeline is connected with waste heat boiler (9) and deduster (11) behind the described flue collector (8).
2. electric furnace flue gas heat recovery device as claimed in claim 1 is characterized in that: the pipeline of described air inducing groove (6) bottom is provided with flue gas flow control valve (7).
3. electric furnace flue gas heat recovery device as claimed in claim 1 or 2 is characterized in that: described waste heat boiler (9) is waterpipe type waste heat boiler and/or heat pipe waste heat boiler.
CN2010201176696U 2010-02-24 2010-02-24 Electric furnace flue gas waste heat recovery utilization device Expired - Lifetime CN201621973U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201176696U CN201621973U (en) 2010-02-24 2010-02-24 Electric furnace flue gas waste heat recovery utilization device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201176696U CN201621973U (en) 2010-02-24 2010-02-24 Electric furnace flue gas waste heat recovery utilization device

Publications (1)

Publication Number Publication Date
CN201621973U true CN201621973U (en) 2010-11-03

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CN (1) CN201621973U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110451777A (en) * 2019-09-09 2019-11-15 蚌埠中光电科技有限公司 A kind of float glass refractory brick preheating device and its pre-heating mean
CN111575439A (en) * 2020-05-28 2020-08-25 中冶赛迪技术研究中心有限公司 Emission reduction method and system for treating waste pollutants by electric arc furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110451777A (en) * 2019-09-09 2019-11-15 蚌埠中光电科技有限公司 A kind of float glass refractory brick preheating device and its pre-heating mean
CN111575439A (en) * 2020-05-28 2020-08-25 中冶赛迪技术研究中心有限公司 Emission reduction method and system for treating waste pollutants by electric arc furnace

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Granted publication date: 20101103