CN202928378U - Comprehensive utilization system for waste heat of walking-beam heating furnace - Google Patents
Comprehensive utilization system for waste heat of walking-beam heating furnace Download PDFInfo
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- CN202928378U CN202928378U CN2012206042273U CN201220604227U CN202928378U CN 202928378 U CN202928378 U CN 202928378U CN 2012206042273 U CN2012206042273 U CN 2012206042273U CN 201220604227 U CN201220604227 U CN 201220604227U CN 202928378 U CN202928378 U CN 202928378U
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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
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Abstract
The utility model discloses a comprehensive utilization system for waste heat of a walking-beam heating furnace. The comprehensive utilization system is designed aiming at solving the problem that the waste heat utilization ratio of the existing walking-beam heating surface is low. The comprehensive utilization system for the waste heat of the walking-beam heating furnace comprises a furnace bottom waste heat utilization device, a flue waste heat utilization device which is connected with the furnace bottom waste heat utilization, and an energy circulating device. The comprehensive utilization system for the waste heat of the walking-beam heating furnace provided by the utility model has the advantages that the recovery of the waste heat of the heating furnace is improved and the heat utilization efficiency is improved.
Description
Technical field
The utility model relates to a kind of walking beam heating furnace waste heat comprehensive utilization system.
Background technology
In these several years domestic processes of greatly developing steel and iron industry, steel and iron industry has become domestic the first energy consumption and discharging rich and influential family, but China's Technology For Energy Saving In Iron And Steel Industry is universal also very low, and the energy consumption per ton steel of key enterprise is compared with international most advanced level and also exceeded 20%-30%.And at present, country has made very large effort on legislation and development energy saving economy, index to the steel industry energy-saving and emission-reduction has also been made concrete requirement, and the industrial policy that each family's Key Iron And Steel also lowers consumption at the response national energy-saving, walk to develop a circular economy, energy savings, the way of environment, enterprise overall qualities improved.like this, metallurgical furnace (comprises blast furnace, converter, electric furnace, heating furnace) the UTILIZATION OF VESIDUAL HEAT IN technology obtains significant progress as great power-saving technology, wherein the walking beam heating furnace Vaporization Cooling just begins to use in China's eighties of last century the end of the nineties, and this technology has been used each iron and steel enterprise as mature technology at present, be generally 0.8MPa or 1.27MPa saturated vapor but the cooling recovery of walking beam heating furnace vaporization obtains, after being recycled, this secondary energy sources only pour iron and steel enterprise's low-pressure steam pipe network, the even emptying that has, do not obtain comprehensive effectively utilization, greatly reduce the economy of this technology, simultaneously after the air preheater in walking beam heating furnace flue gas process flue, exhaust gas temperature still has 360 ℃, this part potential waste heat has been wasted in vain.
The utility model content
For the problems referred to above, the utility model provides a kind of waste heat recovery thoroughly and the high walking beam heating furnace waste heat comprehensive utilization system of utilization rate of the waste heat that reclaims.
For achieving the above object, the utility model walking beam heating furnace waste heat comprehensive utilization system comprises device for utilizing waste heat in flue and energy circulation device that the furnace bottom residual heat using device is connected with described furnace bottom residual heat using device;
Described furnace bottom residual heat using device, comprise the distribution header that drum, the furnace bottom pipeline of described drum connection, described furnace bottom pipeline connect, wherein said furnace bottom pipeline comprises fixedly water beam and movable water beam, and described drum is connected by associated ping with described furnace bottom pipeline;
Described device for utilizing waste heat in flue, comprise the vapour-gas heat exchanger that connects described drum and be connected the air-cooler of mixing that the vapour-gas heat exchanger connects, the connecting line of wherein said drum and described vapour-gas heat exchanger is provided with the control valve group, and described gas-vapour heat exchanger connects plant area's pipe network by associated ping;
Energy circulation device comprises, connects at least three circulating pumps of described drum and described furnace bottom pipeline and diesel engine, motor and the industrial steam turbine that drives respectively described circulating pump.
Further, described industrial steam turbine is packaged formula back pressure industrial steam turbine.
The utility model walking beam heating furnace waste heat comprehensive utilization system, greatly improve the economy of UTILIZATION OF VESIDUAL HEAT IN, can reclaim the most waste heats that produce in big-and-middle-sized walking beam heating furnace smelting process, improve the yield of waste heat, and the waste heat that reclaims is by cascade utilization, high-grade heat energy is used for driving industrial steam turbine, and low grade heat energy is sent into plant area's low-pressure steam pipe network, can improve the utilization ratio of heat energy.
Description of drawings
Fig. 1 is the structural representation of prior art walking beam heating furnace bootstrap system;
Fig. 2 is the structural representation of the utility model walking beam heating furnace waste heat comprehensive utilization system.
The specific embodiment
Below in conjunction with Figure of description, the utility model is further described.
As shown in Figure 1, according to existing technical scheme, the water of hydrospace, drum bottom reaches the permissible velocity of cooling needs after the circulating pump pressurization, flow through furnace bottom built-in beam and furnace bottom walking beam, by the furnace high-temperature flue gas, the part water vapor, steam water interface returns drum, establish water separator in drum, steam water interface is separated into vapour and water, and saturated vapor is delivered to downstream user from drum top outflow, and water is got back to again hydrospace, drum bottom and entered the next round circulation.The resistance of the whole circulatory system is damaged and is overcome by the circulating pump that arranges in the circulatory system, and the security for furnace bottom water beam when the heating furnace laser heating steel billet is provided with two electric circulating pumps, a diesel engine cycle pump altogether.In system's running, only has an electric circulating pump in operation, another electric circulating pump is as standby, and the diesel engine cycle pump is in the situation that lose station service and automatically start, to guarantee that furnace temperature of heating furnace drops to the safety of furnace bottom water beam 250 ℃ of these processes of left and right from 1200 ℃ of left and right in addition.At present, domestic walking beam type heating furnace bottom water beam, adopt Vaporization Cooling, it is all this collocation form, walking beam heating furnace take specified heating efficiency of Shandong steel mill as 180t/h (cold charge) is as example, the electric circulation pump power is 110KW, is energy consumption equipment maximum in whole evaporated cooling system.The 1.27MPa saturated vapor that recovery obtains is sent into steam pipe system, long distance is to downstream user, and the steam parameter of customer requirements is about the 0.3MPa-0.5MPa left and right, the complementary energy that reclaims is not utilized effectively, and save at non-heating season, this steel mill steam is superfluous, and the diffusion valve of opening drum top diffuses, and reclaims the waste heat that obtains and is not utilized; In addition, after the air preheater in flue gas of heating furnace process flue, then approximately 360 ℃ of cigarette temperature pass through smoke stack emission.Existing technical scheme is not efficiently utilized this two parts waste heat.
As shown in Figure 2, walking beam heating furnace furnace temperature comprehensive waste-heat utilizing device of the present utility model comprises device for utilizing waste heat in flue and energy circulation device that the furnace bottom residual heat using device is connected with described furnace bottom residual heat using device;
Described furnace bottom residual heat using device, comprise drum 1, the furnace bottom pipeline 3 that described drum connects, the distribution header that described furnace bottom pipeline connects, wherein said furnace bottom pipeline comprises fixedly water beam and movable water beam, and described drum is connected by associated ping 4 with described furnace bottom pipeline;
Described device for utilizing waste heat in flue, comprise the vapour-gas heat exchanger that connects described drum be connected that vapour-gas heat exchanger 6 connects mix air-cooler 7, the connecting line of wherein said drum and described vapour-gas heat exchanger is provided with control valve group 5, and described gas-vapour heat exchanger connects plant area's pipe network by associated ping;
Energy circulation device comprises, the diesel engine 8, motor 9 and the industrial steam turbine 10 that connect at least three circulating pumps 2 of described drum and described furnace bottom pipeline and drive respectively described circulating pump, described industrial steam turbine is packaged formula back pressure industrial steam turbine, and driving the vapour source from this walking beam heating furnace waste heat comprehensive utilization system, most of waste heat energy of recovery is realized in native system recycling.
During use, packaged formula back pressure industrial steam turbine 10 drives a circulating pump 2 as working barrel; Motor 9 drives a circulating pump 2 as stand-by pump, diesel engine 8 drives a circulating pump 2 in the situation that lose station service and automatically start in addition, this circulating pump combination type of drive definite functions, configuration rationally, can guarantee the safety of furnace bottom water beam fully, the energy can fully utilize by step simultaneously, vapour-gas heat exchanger 6 is set after the air preheater of heating furnace flue afterbody, heat exchanger is the adverse current shell and tube exchanger, flue gas is walked shell side, flue gas enters atmosphere by chimney after lowering the temperature by heat exchanger again, reduces thermal pollution; Steam is walked tube side, and saturated vapor becomes superheated steam after heating up by heat exchanger, then sends into packaged formula back pressure industrial steam turbine, and the power of generation is used for driving water circulating pump, and back pressure steam is sent into steam pipe system again, delivers to downstream low-pressure steam user.
In addition, in the heating furnace air and gas system, for preventing cigarette temperature overtemperature before air preheater, be provided with and mix one of air-cooler, mix air-cooler and automatically move, the protection air heat exchanger.Simultaneously the utility model also will utilize the existing air-cooler of mixing to regulate the cigarette temperature of admission-gas heat exchanger 6 is intervened, prevent that import cigarette temperature is too high, protection heat exchanger 6, for guaranteeing to carry out independent adjusting into the cigarette temperature of heat exchanger 6, special at former increase by one road arm on the female pipe of cold wind of mixing of mixing the air-cooler outlet, louvre type air quantity automatic regulating valve is set on arm; In addition, separately establish bypass advancing the industrial steam turbine jet chimney, factory's net is directly incorporated in this bypass of steam into when steam turbine can not normally move.
The utility model walking beam heating furnace waste heat comprehensive utilization system, partially recycled 1.27MPa and the above saturated vapor of obtaining of Bottom of Heating Furnace water beam apparatus for vapour-cooling, reach the purpose of water beam at the bottom of cool furnace and recovery waste heat, waste heat is recycled with the form that produces steam; In addition, flue gas of heating furnace is through after air preheater, exhaust gas temperature still has 360 ℃ of left and right, in order to absorb the heat content of 360 ℃ of smoke evacuations, the cigarette temperature drop to low as far as possible, is arranged a vapour-gas shell and tube exchanger in the flue of heating furnace air preheater back, flue gas is walked shell side, flue gas enters atmosphere by chimney after lowering the temperature by heat exchanger again, reduces thermal pollution; Steam is walked tube side, saturated vapor becomes superheated steam after heating up by heat exchanger, sends into the back pressure type industrial steam turbine after reaching the requirement of industrial steam turbine to steam superheat, drives the power that produces and is used for driving water circulating pump, back pressure steam is sent into steam pipe system again, delivers to downstream low-pressure steam user.This device can reclaim the most waste heats that produce in big-and-middle-sized walking beam heating furnace smelting process, improve the yield of waste heat, and the waste heat that reclaims is by cascade utilization, high-grade heat energy is used for driving industrial steam turbine, low grade heat energy is sent into plant area's low-pressure steam pipe network, can improve the utilization ratio of heat energy.
Above; it is only preferred embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement are within all should being encompassed in protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim was defined.
Claims (2)
1. a walking beam heating furnace waste heat comprehensive utilization system, is characterized in that: comprise device for utilizing waste heat in flue and energy circulation device that the furnace bottom residual heat using device is connected with described furnace bottom residual heat using device;
Described furnace bottom residual heat using device comprises, drum, the furnace bottom pipeline that described drum connects, the distribution header that described furnace bottom pipeline connects, wherein said furnace bottom pipeline comprises fixedly water beam and movable water beam, and described drum is connected by associated ping with described furnace bottom pipeline;
Described device for utilizing waste heat in flue, comprise the vapour-gas heat exchanger that connects described drum and be connected the air-cooler of mixing that the vapour-gas heat exchanger connects, the connecting line of wherein said drum and described vapour-gas heat exchanger is provided with the control valve group, and described gas-vapour heat exchanger connects plant area's pipe network and industrial steam turbine;
Energy circulation device comprises, connects at least three circulating pumps of described drum and described furnace bottom pipeline and diesel engine, motor and the industrial steam turbine that drives respectively described circulating pump.
2. walking beam heating furnace waste heat comprehensive utilization system according to claim 1, it is characterized in that: the operation cycle pump drives by packaged formula back pressure industrial steam turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206042273U CN202928378U (en) | 2012-11-15 | 2012-11-15 | Comprehensive utilization system for waste heat of walking-beam heating furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012206042273U CN202928378U (en) | 2012-11-15 | 2012-11-15 | Comprehensive utilization system for waste heat of walking-beam heating furnace |
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| CN202928378U true CN202928378U (en) | 2013-05-08 |
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| CN2012206042273U Expired - Fee Related CN202928378U (en) | 2012-11-15 | 2012-11-15 | Comprehensive utilization system for waste heat of walking-beam heating furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673591A (en) * | 2013-12-10 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Evaporated cooling system of heat accumulating type rod and wire stepping furnace |
-
2012
- 2012-11-15 CN CN2012206042273U patent/CN202928378U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673591A (en) * | 2013-12-10 | 2014-03-26 | 北京神雾环境能源科技集团股份有限公司 | Evaporated cooling system of heat accumulating type rod and wire stepping furnace |
| CN103673591B (en) * | 2013-12-10 | 2015-07-01 | 北京神雾环境能源科技集团股份有限公司 | Evaporated cooling system of heat accumulating type rod and wire stepping furnace |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20191115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |