CN102536361A - Comprehensive utilizing system for firing waste heat and saturated vapor - Google Patents
Comprehensive utilizing system for firing waste heat and saturated vapor Download PDFInfo
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- CN102536361A CN102536361A CN2012100461066A CN201210046106A CN102536361A CN 102536361 A CN102536361 A CN 102536361A CN 2012100461066 A CN2012100461066 A CN 2012100461066A CN 201210046106 A CN201210046106 A CN 201210046106A CN 102536361 A CN102536361 A CN 102536361A
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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
Abstract
The invention discloses a comprehensive utilizing system for firing waste heat and saturated vapor, which comprises a firing waste heat recovering device, a main vapor mixing device, a turbine and a generator, wherein the firing waste heat recovering device comprises a circular cooling machine and a waste heat boiler; an air inlet is arranged on a front section of the circular cooling machine; the waste heat boiler is connected with the air inlet so as to obtain flue gas from the air inlet; the flue gas and a working medium are subjected to heat exchange in the waste heat boiler; a main vapor is outputted from a main vapor outlet of the waste heat boiler; the main vapor mixing device is respectively connected with the main vapor outlet of the waste heat boiler and an outlet of a vapor super-heater; the main vapor mixing device is used for respectively receiving and mixing the main vapor of the waste heat boiler and the external vapor; the pressure of the main vapor of the waste heat boiler is matched with the pressure of the external saturated vapor; a vapor inlet of the turbine is connected with the main vapor mixing device and is used for receiving the mixed vapor; and the generator is connected with the turbine and is driven to output electric energy by the turbine. The comprehensive utilizing system for firing waste heat and saturated vapor has the advantages that the stability of a generating system is increased by the mutual supporting of the vapors at two positions and the repeated construction is reduced by adopting centralized utilization.
Description
Technical field
The present invention relates to thermal source and utilize the field, relate in particular to a kind of sintering waste heat and saturated vapour utilization system.
Background technique
Sintering waste heat and saturated vapour more than needed are residual heat resources common in the iron and steel enterprise, and at present, domestic enterprise generally reclaims respectively to these two kinds of residual heat resources, builds sintering waste heat generating project and saturated vapour power generation project respectively.
The high-temp waste gas that sintering waste heat generating is mainly discharged with central cooler in the sintering workshop section serves as to recycle object, utilizes the waste heat of waste gas to generate electricity.Fig. 1 is the schematic representation of existing sintering waste heat generating system; As shown in Figure 1, sintering waste heat generating system 100 comprises central cooler 101, exhaust heat boiler 102, circulating fan 110, steam turbine 103, generator 104, vapour condenser 105, condensate pump 106, gland heater 107, oxygen-eliminating device 109 and feed water pump 108 etc.Central cooler 101 is provided with a plurality of air ports of getting, and flue gas is drawn via the air port of getting on the central cooler 101, and sends into exhaust heat boiler 102.Flue gas heated feed water in exhaust heat boiler 102 is produced steam, and returns the bottom bellows of central cooler 101 through circulating fan 110 foldbacks, and circulation is used for the sintering deposit cooling.Steam gets in the steam turbine 103, so that steam turbine 103 drives generator 104 output electric energy.Exhaust steam becomes water of condensation after the acting of steam turbine 103 output after vapour condenser 105 coolings, sends into oxygen-eliminating device 109 via behind condensate pump 106 and the gland heater 107, and sends into exhaust heat boiler 102 by feed water pump 108, begins next circulation.
For existing various sintering waste heat generating systems, its main steam condition depends on the parameter of the high-temperature flue gas of central cooler discharge, and system's operation receives the restriction of flue gas fluctuation.In addition, from the reason of sintering process and installation feature, the fume afterheat of central cooler has certain fluctuation.Sintering machine plan and non-programmed halt number of times are more on the one hand, and temporary stoppage is more frequent; On the other hand cloth, sintering, unload links such as ore deposit, cloth wind and all have certain randomness, flue-gas temperature is difficult to stablize, within the specific limits fluctuation continuously.For the sintering waste heat generating project, receive the restriction of upper reaches SINTERING PRODUCTION fluctuation, the unstability of system is the critical problem of this technical field, and is especially outstanding in single stove unit project.
The saturated vapour power generation project is sent saturated vapour into the acting of expanding in the steam turbine through Turbo-generator Set is set, so that Steam Turbine Driven generator output electric energy.This project utilization saturated vapour more than needed generates electricity, and technological process is simple relatively.
For the saturated vapour power generation project, because converter steam often occupies significant proportion in the saturated vapour production more than needed of iron and steel enterprise.Because converter production has periodically, its production of steam is corresponding to have cyclic fluctuation.When converter quantity more for a long time, whole production of steam is continuous relatively, and is less through parameter fluctuation behind the thermal accumulator current stabilization; When the converter negligible amounts, the fluctuation problem of steam is comparatively outstanding, and recycling is caused difficulty.
In addition, sintering waste heat generating project and saturated vapour power generation project all belong to the small power generation project, and project construction scope, capital equipment and operation maintenance mode are all most of to be overlapped, and project is independent respectively builds, and causes the waste of resource in a way.
Therefore, need a kind of sintering waste heat and saturated vapour utilization system to address the above problem.
Summary of the invention
In order to overcome the deficiency of above-mentioned existing technology; The invention provides a kind of sintering waste heat and saturated vapour utilization system; Said sintering waste heat and saturated vapour utilization system comprise: the sintering waste heat recovering device; Said sintering waste heat recovering device comprises central cooler and exhaust heat boiler, and the leading portion of said central cooler is provided with gets the air port, and said exhaust heat boiler is connected to the said air port of getting to obtain flue gas from the said air port of getting; Said flue gas in said exhaust heat boiler with working medium generation heat exchange, and via the main-steam outlet of said exhaust heat boiler output main steam; The main steam mixing arrangement; Said main steam mixing arrangement is connected with the saturated vapour source with said main-steam outlet respectively; Be used for receiving respectively and mix the saturated vapour that said main steam and said saturated vapor source provide; Wherein, the pressure of the said main steam of said main steam mixing arrangement reception and the pressure of said saturated vapour are complementary; Steam turbine, the steam inlet of said steam turbine are connected to said main steam mixing arrangement, to receive mixed steam; And generator, said generator is connected to said steam turbine, with by said Steam Turbine Driven and export electric energy.
Preferably; Said sintering waste heat and saturated vapour utilization system also comprise steam superheater; Said steam superheater is connected between said saturated vapor source and the said main steam mixing arrangement; Said steam superheater is used to receive said saturated vapour, and the temperature that said saturated vapour is heated to said exhaust heat boiler main steam is complementary.
Preferably, the pressure of said main steam is lower than 2MPa.
Preferably, said sintering waste heat recovering device also comprises circulating fan, and the said flue gas of said circulating fan after with heat exchange carried back said central cooler from said exhaust heat boiler.
Preferably; Said sintering waste heat also comprises vapour condenser, condensate pump, water tank, deoxygenation water pump, oxygen-eliminating device and the feed water pump that is connected in order with the saturated vapour utilization system; Wherein, said vapour condenser is connected with said steam turbine, and said feed water pump is connected with said exhaust heat boiler.
Preferably, said sintering waste heat and saturated vapour utilization system also comprise waterback pump, and said waterback pump is connected to said water tank, to export unnecessary water of condensation.
Preferably, also be provided with the low pressure steam outlet on the said exhaust heat boiler, the pressure of the low pressure steam of said low pressure steam outlet output is less than the pressure of said main steam, and said low pressure steam outlet is connected to the filling mouth of said steam turbine.
Preferably, said sintering waste heat and saturated vapour utilization system comprise the said sintering waste heat recovering device of many covers.
Preferably; Said sintering waste heat and saturated vapour utilization system also comprise the low pressure steam mixing arrangement; And all be provided with the low pressure steam outlet on the said exhaust heat boiler of each said sintering waste heat recovering device; The pressure of the low pressure steam of said low pressure steam outlet output is delivered to the filling mouth of said steam turbine less than the pressure of said main steam after said low pressure steam mixes in said low pressure steam mixing arrangement.
Preferably, said main steam mixing arrangement and said low pressure steam mixing arrangement are cylinder or female pipe.
Sintering waste heat provided by the invention and saturated vapour utilization system; Pressure through making the saturated vapour that main steam that the main steam mixing arrangement receives and saturated vapor source provide is complementary; Two place's steam are compiled the back unification generate electricity, and then with sintering waste heat and saturated vapour comprehensive utilization more than needed.Through the mutual support of two place's steam, increase the stability of power generation system on the one hand,, reduce repeated construction on the other hand through focus utilization.
In the summary of the invention part, introduced the notion of a series of reduced forms, this will further explain in the embodiment part.Content part of the present invention does not also mean that key feature and the essential features that will attempt to limit technological scheme required for protection, does not more mean that the protection domain of attempting to confirm technological scheme required for protection.
Below in conjunction with accompanying drawing, specify advantage of the present invention and characteristic.
Description of drawings
Attached drawings of the present invention is used to understand the present invention at this as a part of the present invention.Embodiments of the invention and description thereof have been shown in the accompanying drawing, have been used for explaining principle of the present invention.In the accompanying drawings,
Fig. 1 is the schematic representation of existing sintering waste heat generating system; And
Fig. 2 is the schematic representation according to sintering waste heat of one embodiment of the present invention and saturated vapour utilization system.
Embodiment
In the description hereinafter, a large amount of concrete details have been provided so that more thorough understanding of the invention is provided.Yet, it will be apparent to one skilled in the art that the present invention can need not one or more these details and be able to enforcement.In other example,, describe for technical characteristicss more well known in the art for fear of obscuring with the present invention.
In order thoroughly to understand the present invention, detailed structure will be proposed in following description.Obviously, execution of the present invention is not limited to the specific details that those skilled in the art has the knack of.Preferred embodiment of the present invention is described in detail as follows, yet except these were described in detail, the present invention can also have other mode of executions.
The invention provides a kind of sintering waste heat and saturated vapour utilization system, this system can be with sintering waste heat and saturated vapour comprehensive utilization more than needed.Fig. 2 is the schematic representation according to sintering waste heat of one embodiment of the present invention and saturated vapour utilization system 200.To combine Fig. 2 that sintering waste heat according to the present invention and saturated vapour utilization system 200 are described in detail below.Need to prove that when mentioning " in order connect " perhaps during " connections " multiple arrangement, this " connection in order " perhaps " connection " can be directly adjacent device to be linked together, and can also be between adjacent device, to be connected with middle device; When mentioning " directly connecting " multiple arrangement, be to be understood that to multiple arrangement directly connects, promptly between multiple arrangement, be not connected with middle device.
Sintering waste heat and saturated vapour utilization system 200 comprise sintering waste heat recovering device 220, main steam mixing arrangement 204, steam turbine 205 and generator 206.
Sintering waste heat recovering device 220 comprises central cooler 201 and exhaust heat boiler 202.The leading portion of central cooler 201 is provided with gets air port a, b.Wherein, The position of " leading portion " of central cooler 201 for taking out the flue gas of higher temperature on the central cooler 201; And according to the requirement to concrete waste heat reclaiming process; Get air port a, b and can be arranged on the diverse location place of leading portion, for example be arranged on central cooler 201 leading portions and can take out temperature and be higher than 250 ℃ position.In addition, get air port a, b though only be provided with two on the central cooler shown in Fig. 2 201, the present invention also is not intended to the quantity of getting the air port is limited.The position and the quantity of getting air port a, b can be provided with according to actual needs, as long as can satisfy the downstream process requirement.For from get air port a, b obtains flue gas, exhaust heat boiler 202 is connected to gets air port a, b, particularly, the smoke inlet of exhaust heat boiler 202 is connected to gets air port a, b.Get into flue gas in the exhaust heat boiler 202 exhaust heat boiler 202 in and working medium generation heat exchange, working medium can be seen off via the steam (vapor) outlet of exhaust heat boiler 202 after changing steam into.Flue gas in exhaust heat boiler 202 after the heat exchange cooling, the bottom that can carry back central cooler 201, circulation offers central cooler 201 uses.Exhaust heat boiler 202 is provided with main-steam outlet c, and main steam is done work to offer downstream steam turbine 205 via main-steam outlet c output.
Main steam mixing arrangement 204 is connected with saturated vapour source 230 with main-steam outlet c respectively.Main steam mixing arrangement 204 receives the saturated vapour that provides from the main steam of main-steam outlet c and saturated vapour source 230 respectively, and offers steam turbine 205 after both are mixed within it and use.As an example, main steam mixing arrangement 204 can be the mixed steam cylinder, can also be mother's pipe of the delivery line that connects main steam and saturated vapour respectively, or other similar device.Wherein, the pressure of the main steam that main steam mixing arrangement 204 receives and the pressure of saturated vapour should be complementary, to guarantee the smooth mixing of two strands of steam.Need to prove that main steam and the pressure of saturated vapour are complementary and are to be understood that to the main steam and the pressure of saturated vapour are set to make main steam and saturated vapour to be transported to mix also in the main steam mixing arrangement 204 and successfully provide to steam turbine 205.
As an example, the pressure of said main steam is usually less than 2MPa, to guarantee the smooth mixing of two strands of steam.
The steam inlet of steam turbine 205 is connected to main steam mixing arrangement 204, to receive mixed steam.Steam turbine 205 can be condensing steam turbine, back pressure turbine, extraction steam turbine, bleed back pressure turbine or multi-pressure turbine or the like.Those skilled in the art can select the kind and the technical parameter of steam turbine 205 as required.
It is thus clear that; Sintering waste heat provided by the invention and saturated vapour utilization system 200; Main steam through main steam mixing arrangement 204 is received is complementary with the pressure of saturated vapour, two place's steam is compiled the back is unified generates electricity, and then sintering waste heat and saturated vapour more than needed are fully utilized.Through the mutual support of two place's steam, increase the stability of power generation system on the one hand,, reduce repeated construction on the other hand through focus utilization.
Further, sintering waste heat recovering device 220 also comprises circulating fan 211, and circulating fan 211 is connected between the smoke outlet of central cooler 201 and exhaust heat boiler 202, so that the flue gas after the heat exchange is carried back central cooler 201 from exhaust heat boiler 202.In addition; Upstream and downstream at circulating fan 211 can also be provided with air compensation device and air exhausting device respectively, to satisfy the adjusting control under normal operation of system and the special operation condition, wherein; Not shown air compensation device and air exhausting device in Fig. 2, and only represent to mend wind and air draft with arrow M and N.Certainly, the low-temperature flue gas that the smoke outlet of exhaust heat boiler 202 is discharged can also enter in the atmosphere, can also handle these low-temperature flue gas before in entering atmosphere, environment is exerted an influence avoiding.
Preferably, sintering waste heat and saturated vapour utilization system 200 also comprise steam superheater 203, and steam superheater 203 is connected between saturated vapour source 230 and the main steam mixing arrangement 204.Steam superheater 203 230 receives saturated vapours from the saturated vapour source, and the temperature that saturated vapour is heated to the exhaust heat boiler main steam is complementary.Steam superheater 203 can be combustion superheater or energized superheater etc., and fuel type, combustion manner, energising mode of heating and/or heat exchange mode etc. can carry out choose reasonable as required.This sintering waste heat and saturated vapour utilization system 200 through steam superheater 203 temperature that saturated vapour is heated to main steam be complementary, so that can move long-term and stably.Said temperature be complementary be to be understood that into, the temperature gap of two strands of steam is reached in the scope that main steam mixing arrangement material or performance allow, be mixed into purpose smoothly with what satisfy two strands of steam.Reaching overheated external steam to satisfy under the prerequisite of mixing requirement, steam superheater also can increase the function of self-produced part steam.In addition, the saturated vapour that steam superheater 203 can not only provide saturated vapour source 230 heats, and can also have the function of production part steam.
In accordance with a preferred embodiment of the present invention, this sintering waste heat also comprises vapour condenser 207, condensate pump 208, water tank 209, deoxygenation water pump 210, oxygen-eliminating device 211 and the feed water pump 212 that is connected in order with saturated vapour utilization system 200.Wherein, vapour condenser 207 is connected with steam turbine 207, and feed water pump 212 is connected with exhaust heat boiler 202.Exhaust steam in steam turbine 205 after the acting gets into vapour condenser 207, and in vapour condenser 207, condenses into water, and water of condensation is delivered to water tank 209 through condensate pump 208.Deoxygenation water pump 210 extracts water of condensation from water tank 209 and delivers to oxygen-eliminating device 211, to remove dissolved oxygen and other gas in the water of condensation, prevents that associated components from being corroded.Boiler feed water through behind the oxygen-eliminating device 211 is pumped to exhaust heat boiler 202 by feed water pump 212, and these feedwater with high-temperature flue gas generation heat exchange and change steam into, are sent in the steam turbine 205 and done work exhaust heat boiler 202 in, begin next circulation.In addition; Because the above-mentioned circulatory system needs the 230 reception saturated vapours from the saturated vapour source constantly; Therefore; Offer the part that feedwater that exhaust heat boiler 202 uses is merely the water of condensation that water tank 209 receives by water tank 209, and remaining part (being unnecessary water of condensation) can for example be sent plant area's pipe network etc. back to via waterback pump 213 outputs.
Further, can also be provided with low pressure steam outlet (not shown) on the exhaust heat boiler 202, the pressure of the low pressure steam of low pressure steam outlet output is less than the pressure of main steam, and this low pressure steam outlet is connected to the filling mouth of steam turbine 205.Those skilled in the art can be provided with the progression of 202 producing steams of exhaust heat boiler and the parameter of steam at different levels according to system's needs, as long as can realize the function of this sintering waste heat and saturated vapour utilization system 200.
In addition; Sintering waste heat and saturated vapour utilization system 200 can comprise a plurality of sintering waste heat recovering devices 220; To reclaim the many places sintering waste heat through one or more sets Turbo-generator Set (mainly comprising steam turbine 204 and generator 205); And then avoid overlapping construction, and can more effectively improve the stability of power generation system.Further; This sintering waste heat and saturated vapour utilization system 200 also comprise low pressure steam mixing arrangement (not shown); And all can be provided with the low pressure steam outlet on the exhaust heat boiler 202 of each sintering waste heat recovering device 220, the pressure of the low pressure steam of low pressure steam outlet output is less than the pressure of main steam.The low pressure steam mixing arrangement is connected with the low pressure steam outlet of a plurality of exhaust heat boilers 202 respectively, receives the low pressure steam from a plurality of exhaust heat boilers respectively.After mixing, the multiply low pressure steam is delivered to the filling mouth of steam turbine 205 in the low pressure steam mixing arrangement.As an example, the low pressure steam mixing arrangement can be the mixed steam cylinder, can also be the female pipe of the low pressure steam that connects each exhaust heat boiler respectively, or other similar device.
The present invention is illustrated through the foregoing description, but should be understood that, the foregoing description just is used for for example and illustrative purposes, but not is intended to the present invention is limited in the described scope of embodiments.It will be appreciated by persons skilled in the art that in addition the present invention is not limited to the foregoing description, can also make more kinds of variants and modifications according to instruction of the present invention, these variants and modifications all drop in the present invention's scope required for protection.Protection scope of the present invention is defined by appended claims book and equivalent scope thereof.
Claims (10)
1. sintering waste heat and saturated vapour utilization system is characterized in that said sintering waste heat and saturated vapour utilization system comprise:
The sintering waste heat recovering device; Said sintering waste heat recovering device comprises central cooler and exhaust heat boiler; The leading portion of said central cooler is provided with gets the air port; Said exhaust heat boiler is connected to the said air port of getting obtaining flue gas from the said air port of getting, said flue gas in said exhaust heat boiler with working medium generation heat exchange, and via the main-steam outlet output main steam of said exhaust heat boiler;
The main steam mixing arrangement; Said main steam mixing arrangement is connected with the saturated vapour source with said main-steam outlet respectively; Be used for receiving respectively and mix the saturated vapour that said main steam and said saturated vapor source provide; Wherein, the pressure of the said main steam of said main steam mixing arrangement reception and the pressure of said saturated vapour are complementary;
Steam turbine, the steam inlet of said steam turbine are connected to said main steam mixing arrangement, to receive mixed steam; And
Generator, said generator is connected to said steam turbine, with by said Steam Turbine Driven and export electric energy.
2. according to described sintering waste heat of claim 1 and saturated vapour utilization system; It is characterized in that; Said sintering waste heat and saturated vapour utilization system also comprise steam superheater; Said steam superheater is connected between said saturated vapor source and the said main steam mixing arrangement, and said steam superheater is used to receive said saturated vapour, and the temperature that said saturated vapour is heated to said exhaust heat boiler main steam is complementary.
3. according to described sintering waste heat of claim 1 and saturated vapour utilization system, it is characterized in that the pressure of said main steam is lower than 2MPa.
4. according to described sintering waste heat of claim 1 and saturated vapour utilization system; It is characterized in that; Said sintering waste heat recovering device also comprises circulating fan, and the said flue gas of said circulating fan after with heat exchange carried back said central cooler from said exhaust heat boiler.
5. according to described sintering waste heat of claim 1 and saturated vapour utilization system; It is characterized in that; Said sintering waste heat also comprises vapour condenser, condensate pump, water tank, deoxygenation water pump, oxygen-eliminating device and the feed water pump that is connected in order with the saturated vapour utilization system; Wherein, said vapour condenser is connected with said steam turbine, and said feed water pump is connected with said exhaust heat boiler.
6. according to described sintering waste heat of claim 5 and saturated vapour utilization system, it is characterized in that said sintering waste heat and saturated vapour utilization system also comprise waterback pump, said waterback pump is connected to said water tank, to export unnecessary water of condensation.
7. according to described sintering waste heat of claim 1 and saturated vapour utilization system; It is characterized in that; Also be provided with the low pressure steam outlet on the said exhaust heat boiler; The pressure of the low pressure steam of said low pressure steam outlet output is less than the pressure of said main steam, and said low pressure steam outlet is connected to the filling mouth of said steam turbine.
8. according to described sintering waste heat of claim 1 and saturated vapour utilization system, it is characterized in that said sintering waste heat and saturated vapour utilization system comprise the said sintering waste heat recovering device of many covers.
9. according to described sintering waste heat of claim 8 and saturated vapour utilization system; It is characterized in that; Said sintering waste heat and saturated vapour utilization system also comprise the low pressure steam mixing arrangement; And all be provided with the low pressure steam outlet on the said exhaust heat boiler of each said sintering waste heat recovering device; The pressure of the low pressure steam of said low pressure steam outlet output is delivered to the filling mouth of said steam turbine less than the pressure of said main steam after said low pressure steam mixes in said low pressure steam mixing arrangement.
10. according to described sintering waste heat of claim 9 and saturated vapour utilization system, it is characterized in that said main steam mixing arrangement and said low pressure steam mixing arrangement are cylinder or female pipe.
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| CN103089354A (en) * | 2013-01-27 | 2013-05-08 | 南京瑞柯徕姆环保科技有限公司 | Steam Rankine-ammonia vapor Rankine combined cycle power generation device |
| CN103089355A (en) * | 2013-01-27 | 2013-05-08 | 南京瑞柯徕姆环保科技有限公司 | Steam Rankine-low boiling point working medium Rankine combined cycle power generation device |
| CN104807338A (en) * | 2015-05-13 | 2015-07-29 | 湖南中冶长天节能环保技术有限公司 | Coal gas, converter steam and sintering waste heat combined power generation device and waste heat utilization method |
| CN109813138A (en) * | 2019-03-07 | 2019-05-28 | 大唐东营发电有限公司 | A kind of boiler condenser two-stage vacuum pump control system |
| CN114396610A (en) * | 2021-12-28 | 2022-04-26 | 东方电气集团东方锅炉股份有限公司 | System and method for heating external steam by thermal power boiler |
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Application publication date: 20120704 |