CN1614034A - Blowing energy recovering method for blast furnace - Google Patents
Blowing energy recovering method for blast furnace Download PDFInfo
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- CN1614034A CN1614034A CN 200410026394 CN200410026394A CN1614034A CN 1614034 A CN1614034 A CN 1614034A CN 200410026394 CN200410026394 CN 200410026394 CN 200410026394 A CN200410026394 A CN 200410026394A CN 1614034 A CN1614034 A CN 1614034A
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Abstract
The invention was involved in a method to recovery blast energy from air blast of blast furnace and rest pressure generators of gas of blast energy. Gas turbo of blast energy from rest pressure generators by clutch was connected with electric motor or steam turbine in air blast of blast furnace and rest pressure generating system in rest pressure generators of gas of blast energy was cancelled. All the above formed the recovery groups. The power was provided by electric motor or steam turbine in air blast of blast furnace and gas turbo of blast energy from rest pressure generators. The structure was compact with small floor space and convenient to layout. Mechanical loss was low and control system was simple with low investment cost. The cost was lower 10%-20% than that of a set of air blast with blast furnace and rest pressure generators of gas of blast energy. And the investment recovery period shorten 1-2 years.
Description
Technical field
The invention belongs to the Power Machinery Engineering professional domain, particularly blast furnace blast and blast furnace gas energy recovery.
Background technology
Steel Complex occupy crucial status in Chinese national economy, simultaneously, Steel Complex also are major power consumers.The ironmaking system energy consumption of domestic Steel Complex generally will account for 70% of enterprise's total energy consumption, wherein 55% consumes in the blast-furnace smelting system.Therefore, the energy Conservation of Blast Furnace consumption reduction is significant.
Blast furnace blast and blast furnace gas excess pressure power generating adopt a blast furnace to join a cover gas blower group or blast furnace is joined a cover gas blower group and a cover blast furnace gas excess pressure power generating device from development so far always.At present, blast furnace with good conditionsi all adopts a blast furnace to join a cover gas blower group and a cover blast furnace gas excess pressure power generating device (Fig. 1).Wherein, the blast furnace blast unit is formed, or is made up of blast furnace blowing engine and steam turbine by blast furnace blowing engine (axial compressor or centrifugal compressor), wheel box, electric motor.The effect of blast furnace blast unit is for blast-furnace smelting provides pressurized air, satisfies the needs of blast-furnace smelting.Therefore, the blast furnace blast unit is the requisite power ventilation apparatus of blast furnace.For save energy, reduction ironmaking cost, at present, the general employing of the blast furnace blowing engine axial compressor higher than centrifugal compressor efficient.Blast furnace gas excess pressure power generating device (hereinafter to be referred as TRT) is the auxiliary facility of blast furnace.It is connected with a generator by a blast furnace gas turbine and forms.The effect of this TRT is pressure energy and the heat energy that the blast furnace gas turbine utilizes top gas to have, and makes coal gas pass through the acting of blast furnace gas turbine expansion, drives generator for electricity generation, carries out energy recovery.Thereby reach purpose of energy saving.Generally speaking, the electric energy of TRT recovery is 25%～35% of a blast furnace blowing engine consumed power.Adopt the blast furnace of this configuration mode, its blast furnace blast unit and TRT generating set are separate, and they all have a cover one's own utility appliance (as power oil station, lubricating oil station, main oil pump, turning gear, top petrol tank etc.) and automatic control system independently separately.For bigger blast furnace, because the coal gas amount of blast furnace is bigger, the power that the blast furnace gas turbine reclaims is bigger, and above-mentioned configuration is comparatively reasonable.But for less blast furnace, because the coal gas amount of blast furnace is less, the power that the blast furnace gas turbine reclaims is less.If still adopt above-mentioned configuration mode, its payback period will increase.
Summary of the invention
In order to reduce investment, shorten and invest return period, the object of the present invention is to provide a kind of method that is applicable to the blast furnace blast energy recovery of blast furnace blast unit and blast furnace gas excess pressure power generating unit, adopt a blast furnace gas turbine and a primover to provide power for blast furnace blowing engine jointly, it can also reclaim the energy of blast furnace gas when giving blast furnace blast, reach the purpose in energy-conservation source.
Realize that the above-mentioned purpose technical solution is, blast furnace gas turbine in the blast furnace gas excess pressure power generating unit directly is connected with the electric motor or the steam turbine of former blast furnace blast unit by clutch coupling, and the top pressure power generation system in the cancellation blast furnace gas excess pressure power generating unit, constitute blast furnace blast energy recovery unit (BlastFurnace Power Recovery Train) (hereinafter to be referred as BPRT); Electric motor or the blast furnace gas turbine in steam turbine and the blast furnace gas excess pressure power generating unit by former blast furnace blast unit are provided power by blast furnace blowing engine jointly.
The method of blast furnace blast energy recovery of the present invention has following characteristics: compact construction, and floor space is little, arrangement convenience, mechanical loss is little, and Controlling System is simple and direct, in the supporting and control sets, the part subsidiary engine is merged into a cover, equipment cost is low, invest little, than a blast furnace join one the cover gas blower group and one the cover blast furnace gas excess pressure power generating device scheme, reduce investment 10%～20%, the payback period shortens 1～2 year.
Description of drawings
Fig. 1 is traditional blast furnace blowing engine and the energy recovery turbine position view at blast furnace system;
Fig. 2 is the position view of BPRT unit in blast furnace system;
Fig. 3 is that electric motor drags BPRT unit layout drawing;
Fig. 4 is that steam turbine drags BPRT unit layout drawing;
Fig. 5 is Yongxing, Anyang 450M
3Blast furnace BPRT unit layout drawing also is one embodiment of the present of invention.
The examples of implementation that provide below in conjunction with accompanying drawing and contriver are described in further detail.
Embodiment
According to technique scheme, the applicant directly is connected the blast furnace gas turbine in the blast furnace gas excess pressure power generating unit with the electric motor or the steam turbine of former blast furnace blast unit by clutch coupling, and the top pressure power generation system in the cancellation blast furnace gas excess pressure power generating unit, constitute blast furnace blast energy recovery unit (BPRT), this unit is the byproduct that utilizes blast-furnace smelting---pressure energy and heat energy that top gas has, through the turbine expansion acting, reclaim the energy of blast furnace gas.Blast furnace gas turbine and electric motor drag blast furnace blowing engine jointly.Therefore, the BPRT unit is blast furnace blast and second energy retrieving arrangement.The BPRT unit plays the effect of energy-saving and environmental protection when giving blast furnace blast, can bring considerable economic and social benefit for iron and steel enterprise.
Blast furnace blast energy recovery unit is made up of blast furnace blowing engine, wheel box, electric motor, clutch coupling, blast furnace gas turbine.(Fig. 2) this BPRT unit does not have generator, does not need to mains supply.The Conversion of energy that the blast furnace gas turbine has blast furnace gas is a mechanical energy, drives blast furnace blowing engine, reduces the energy consumption of electric motor.
The BPRT unit is arranged on the two-layer platform.Drag the BPRT unit by electric motor or steam turbine; The shared cover utility appliance (as power oil station, lubricating oil station, main oil pump, top petrol tank etc.) of (referring to Fig. 3, Fig. 4) this unit, a shared cover Controlling System etc.Can save investment.Because this unit is used first, after soliciting relevant expert's suggestion, this unit is named as: blast furnace blast energy recovery unit.
Fig. 5 is Yongxing, Anyang 450m of Iron And Steel Company
3The blast furnace design, by electric motor driven BPRT unit layout drawing, primover is an electric motor.Among the figure once be from right to left: blast furnace blowing engine, wheel box, electric motor, clutch coupling, blast furnace gas turbine.Adopt the lamination flexible coupling to connect between each equipment, the outside of each shaft coupling is equipped with coupling shield, is used for guaranteeing unit and personnel safety.
1. blast furnace blowing engine: for blast-furnace smelting provides pressurized air.Blast furnace blowing engine is the important power ventilation apparatus of blast furnace, therefore, chooses the proper compression machine, make its safety, reliably, operation economically, be the important step that guarantees ordinary production, reduces running cost.Yongxing, Anyang 450m of Iron And Steel Company
3The blast furnace blowing engine of blast furnace BPRT unit adopts my company to introduce the full stator blade adjustable axial-flow compressor of Switzerland Suhl longevity company.Its exhaust side connects with wheel box by the lamination flexible coupling.The model of this axial compressor is AV40-12.Its characteristics are as follows:
1) efficient height: compare with centrifugal compressor, because the runner of axial compressor gas compression processes is short and simple, gas turns changes little, is mobile vertically substantially.And the runner of centrifugal compressor gas is grown and more zig zag is arranged.Thereby the gas flow loss of axial compressor is little, the efficient height.In addition, the leaf grating of axial compressor, theoretical investigation aspect aerodynamics and cut-and-try work are relatively abundant, experimental data and method of design comparative maturity.So axial compressor efficient is higher by 8%～10% than centrifugal compressor usually.During the gas of compression same volume, the size of multistage centrifugal compressor with complicated runner is than big many of axial compressor, Heavy Weight, cost height.
2) flow is big: during axial compressor is suitable for, big flow, and medium pressure range.My company introduces the flow of full stator blade adjustable axial-flow compressor of Switzerland Suhl longevity company at 950m
3/ min～17500m
3/ min, pressure ratio is 2.5～7.2.
3) flow adjustment range is wide: owing to adopt the adjustable axial compressor of full stator blade, can realize equipressure, etc. Flow-rate adjustment.Its flow adjustment range is wide, generally can reach 70%～115% of point flow, does not need the operation of leaking informaton generally speaking.Safe and reliable to operation.This blast furnace blowing engine adopts axial compressor, is characterized in the efficient height, and design efficiency reaches 90%.
2. wheel box: the working speed of electric motor and blast furnace gas turbine 3000r/min is raised to the needed working speed of blast furnace blowing engine by wheel casing.The gear of wheel casing is monocline tooth, involute flank, and speed ratio is 8000/2985, and maximum delivered power is 6300kW.Electric barring equipment is installed on the wheel casing, is used for carrying out jiggering to axial compressor and electric motor.
3. blast furnace gas turbine: pressure energy and heat energy that the byproduct that utilizes blast-furnace smelting---top gas has, through the turbine expansion acting.For blast furnace blowing engine provides a part of power, thereby the wasted work of saving electric motor reaches purpose of energy saving.
The design of blast furnace gas turbine should be followed following principle:
* do not change the existing equipment of blast furnace system, when the turbine side breaks down, should be able to switch to existing equipment immediately.
* do not change the operating method of blast furnace system
* do not change the character of blast furnace gas
* the blast furnace operating personnel can move turbine safely, easily
This turbine adopts adjustable, the axial flow reaction blading of one-level stator blade, and leaf grating adopts that degree of reaction is 50%, the big through-flow design of runner, can improve load distribution, improves efficiency of turbine, can reduce dust accretions effectively again.Turbine is a dry type blast furnace gas turbine, by regulating the one-level static blade angle, the furnace top pressure of control blast furnace.
4. clutch coupling: blast furnace production is successive, and generally speaking, blast furnace blowing engine also should be non-stop run.And the blast furnace gas turbine can not influence the ordinary production of blast furnace.The effect of clutch coupling is: when blast furnace gas turbine works better, and the ingear working order of clutch coupling, the merit that the blast furnace gas turbine is reclaimed passes to blast furnace blowing engine.When blast furnace staying or blast furnace gas bypass, clutch coupling disconnects blast furnace gas turbine and miscellaneous equipment automatically.Guarantee that blast furnace blowing engine normally moves.Yongxing, Anyang 450M of Iron And Steel Company
3The clutch coupling of blast furnace BPRT unit is selected Britain SSS product for use, and working speed is 3000r/min.Can transmit the power of 4500kW.
5. electric motor: for blast furnace blowing engine provides power.When the blast furnace gas turbine was shut down, this electric motor can provide enough power for blast furnace blowing engine separately.To guarantee the blast furnace ordinary production.Yongxing, Anyang 450m of Iron And Steel Company
3The electric motor of blast furnace BPRT unit is that 2 grades, 10kV power are 6300kW.Structure formation is two shafts, and promptly a side of electric motor connects with wheel casing, and opposite side connects with clutch coupling, and the type of cooling is an air cooling.
The present invention is as being used for 450m
3Blast furnace, when satisfying blast furnace ironmaking, annual recyclable power 2,317 ten thousand kW, (annual by 8000 hours) can save 1158.5 ten thousand yuan of working costs (every degree is by 0.5 yuan) every year.Purify coal gas simultaneously, reduce environmental pollution, play the effect of environmental protection and energy saving.
Claims (3)
1. method that is applicable to the blast furnace blast energy recovery of blast furnace blast unit and blast furnace gas excess pressure power generating unit, comprise a blast furnace and with a supporting blower unit of blast furnace and a cover blast furnace gas excess pressure power generating unit, it is characterized in that, blast furnace gas turbine in the blast furnace gas excess pressure power generating unit directly is connected with the electric motor or the steam turbine of former blast furnace blast unit by clutch coupling, and the top pressure power generation system in the cancellation blast furnace gas excess pressure power generating unit, constitute blast furnace blast energy recovery unit; Electric motor or the blast furnace gas turbine in steam turbine and the blast furnace gas excess pressure power generating unit by former blast furnace blast unit are provided power by blast furnace blowing engine jointly.
2. the method for blast furnace blast energy recovery as claimed in claim 1 is characterized in that, described blast furnace blowing engine is full stator blade adjustable axial-flow compressor.
3. the method for blast furnace blast energy recovery as claimed in claim 1, it is characterized in that, during described blast furnace gas turbine works better, the ingear working order of clutch coupling, the merit that the blast furnace gas turbine is reclaimed passes to blast furnace blowing engine, when blast furnace staying or blast furnace gas bypass, clutch coupling disconnects the blast furnace gas turbine automatically.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410026394 CN1236073C (en) | 2004-08-12 | 2004-08-12 | Blowing energy recovering method for blast furnace |
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| CN 200410026394 CN1236073C (en) | 2004-08-12 | 2004-08-12 | Blowing energy recovering method for blast furnace |
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| CN1236073C CN1236073C (en) | 2006-01-11 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383867A (en) * | 2011-11-02 | 2012-03-21 | 思安新能源股份有限公司 | Coaxial constant-speed turbine set for blast furnace |
| CN102409168A (en) * | 2011-10-28 | 2012-04-11 | 西安陕鼓动力股份有限公司 | Joint driving unit for sintering waste heat recovery and sintering main exhaust fan |
| CN102536345A (en) * | 2012-01-13 | 2012-07-04 | 杭州哲达科技股份有限公司 | Method for increasing running energy efficiency of BPRT (blast furnace power recovery turbine) system |
| CN103233084A (en) * | 2013-04-23 | 2013-08-07 | 中冶南方工程技术有限公司 | System and method for applying blast furnace cinder flushing water heat source to electric blast blower of blast furnace |
| CN103244439A (en) * | 2013-04-23 | 2013-08-14 | 中冶南方工程技术有限公司 | Utilization system and method of blast furnace hot blast stove combustion emission for blast furnace electric blower |
| CN103244211A (en) * | 2013-04-23 | 2013-08-14 | 中冶南方工程技术有限公司 | Utilization system and method of blast furnace cinder water heat source for blast furnace steam blower |
| CN104121048A (en) * | 2013-04-23 | 2014-10-29 | 中冶南方工程技术有限公司 | System and method for applying blast furnace hot blast stove burnt gas to blast furnace steam blower |
| CN105545770A (en) * | 2016-01-28 | 2016-05-04 | 中国船舶重工集团公司第七�三研究所 | Shafting capable of achieving steam-electric alternate drive and combined drive of large-scale static-blade adjustable axial flow fan |
| CN109055636A (en) * | 2018-09-18 | 2018-12-21 | 盐城市联鑫钢铁有限公司 | Blast furnace BPRT energy conserving system |
-
2004
- 2004-08-12 CN CN 200410026394 patent/CN1236073C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409168A (en) * | 2011-10-28 | 2012-04-11 | 西安陕鼓动力股份有限公司 | Joint driving unit for sintering waste heat recovery and sintering main exhaust fan |
| CN102383867A (en) * | 2011-11-02 | 2012-03-21 | 思安新能源股份有限公司 | Coaxial constant-speed turbine set for blast furnace |
| CN102536345A (en) * | 2012-01-13 | 2012-07-04 | 杭州哲达科技股份有限公司 | Method for increasing running energy efficiency of BPRT (blast furnace power recovery turbine) system |
| CN102536345B (en) * | 2012-01-13 | 2014-11-12 | 杭州哲达科技股份有限公司 | Method for increasing running energy efficiency of BPRT (blast furnace power recovery turbine) system |
| CN103233084A (en) * | 2013-04-23 | 2013-08-07 | 中冶南方工程技术有限公司 | System and method for applying blast furnace cinder flushing water heat source to electric blast blower of blast furnace |
| CN103244439A (en) * | 2013-04-23 | 2013-08-14 | 中冶南方工程技术有限公司 | Utilization system and method of blast furnace hot blast stove combustion emission for blast furnace electric blower |
| CN103244211A (en) * | 2013-04-23 | 2013-08-14 | 中冶南方工程技术有限公司 | Utilization system and method of blast furnace cinder water heat source for blast furnace steam blower |
| CN104121048A (en) * | 2013-04-23 | 2014-10-29 | 中冶南方工程技术有限公司 | System and method for applying blast furnace hot blast stove burnt gas to blast furnace steam blower |
| CN105545770A (en) * | 2016-01-28 | 2016-05-04 | 中国船舶重工集团公司第七�三研究所 | Shafting capable of achieving steam-electric alternate drive and combined drive of large-scale static-blade adjustable axial flow fan |
| CN109055636A (en) * | 2018-09-18 | 2018-12-21 | 盐城市联鑫钢铁有限公司 | Blast furnace BPRT energy conserving system |
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|---|---|
| CN1236073C (en) | 2006-01-11 |
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Owner name: XI AN SHANGU MOTOR CO., LTD. Free format text: FORMER OWNER: SHAANXI BLOWER (GROUP) CO., LTD. Effective date: 20071109 |
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Effective date of registration: 20071109 Address after: 710611 King Town, Lintong District, Shaanxi, Xi'an Patentee after: Xi'an Shaangu Power Co., Ltd. Address before: 710611 grand town, Lintong, Shaanxi Patentee before: Shaanxi Blower (Group) Co., Ltd. |