CN203130171U - System utilizing low temperature exhaust heat of flue gas of generating set for power generation - Google Patents
System utilizing low temperature exhaust heat of flue gas of generating set for power generation Download PDFInfo
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- CN203130171U CN203130171U CN201320117605XU CN201320117605U CN203130171U CN 203130171 U CN203130171 U CN 203130171U CN 201320117605X U CN201320117605X U CN 201320117605XU CN 201320117605 U CN201320117605 U CN 201320117605U CN 203130171 U CN203130171 U CN 203130171U
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- flue gas
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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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
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model provides a system utilizing low temperature exhaust heat of flue gas of a generating set for power generation. The system comprises a first steam power generation system, a condensate water pipeline, a low pressure heater, a steam condenser, a flue gas exhaust heat recycling device and a second steam power generation system; the low pressure heater and the steam condenser are arranged on the condensate water pipeline; the first steam power generation system comprises a low pressure cylinder which is connected with the low pressure heater; the flue gas exhaust heat recycling device comprises a heat absorption section and a heat release section, the heat absorption section is arranged in a boiler flue, and the heat release section is disposed on a condensate water branch which is parallelly branched from the condensate water pipeline; and the second steam power generation system comprises a second steam turbine and a second generator which are connected, the second steam turbine is connected with the low pressure cylinder through a steam extraction pipe, and the low pressure cylinder and the second steam turbine are both connected with the steam condenser through a steam exhaust pipe. The low temperature exhaust heat of the flue gas can be recycled safely, the recycled exhaust heat is used for secondary power generation by means of gradient utilization, the problem of inaccurate metering of traditional power generation by recycled heat as well as inefficient utilization of low-temperature exhaust heat of large power plants are solved, and energy saving and environmental protection of power plants are achieved.
Description
Technical field
The utility model relates to the thermal power generation technical field, particularly relates to the system that a kind of flue gas low-temperature waste heat that utilizes generator set generates electricity.
Background technique
Advocate energetically under energy-conserving and environment-protective and the enterprise situation for self-growth in country, the efficient of boiler is more and more higher, the height of efficiency of boiler is mainly reflected in the height of flue gas loss, and temperature of exhaust fume has intuitively reacted flue gas loss, so temperature of exhaust fume is one of important indicator of weighing efficiency of boiler.Temperature of exhaust fume is more high, flue gas loss is more big, efficiency of boiler is more low, therefore the temperature of exhaust fume of boiler is all lower at present, the temperature of exhaust fume of large medium-size boiler is all generally about 135 ℃ now, large-sized boiler particularly, because its air preheater is generally rotary regenerative air heater, so its temperature of exhaust fume may be lower.
Though at present the temperature of exhaust fume of boiler has been down to very lowly, along with the development of power-saving technology, it is lower still can temperature of exhaust fume to be down to by related art scheme, thus the recovery section fume afterheat, and guarantee the normal safe operation of boiler simultaneously.Because exhaust gas temperature is lower, the waste heat grade that reclaims with general heat recovery technology is all lower, in Generator Set, do not have the suitable mode of effectively utilizing, cause the heat recovery project not use in Generator Set, this also is one of energy-conservation subject matter that runs into of low temperature exhaust heat of present Generator Set.And on Generator Set, low-grade heat energy is very abundant comparatively speaking, therefore whether can make its a large amount of low-grade heat energy obtain utilizing by some technological scheme, cause qualitative change with quantitative change, thereby can access part than the heat energy of high-grade, and this part high-grade heat energy effectively utilized in addition? this is the bottleneck that the low-temperature flue gas afterheat energy-saving of present Generator Set runs into, and its subject matter is not recovery waste heat how, but how the waste heat that reclaims effectively utilizes.
General flue gas waste heat recovery technology all is to utilize waste heat to heat demineralized water now, to reduce the consumption of drawing gas of low-pressure heater, the steam that does work in steam turbine like this can increase, but because this part steam grade is lower, its acting generating efficiency of steam turbine for big unit is lower, and influenced the balance of drawing gas of steam generator system, this part of saving drawn gas and can not be utilized efficiently, and this part amount that is used effectively can not effectively measure, and causes amount of energy saving accurately to measure.
The model utility content
The system that the shortcoming of prior art in view of the above, the purpose of this utility model are to provide a kind of flue gas low-temperature waste heat that utilizes generator set to generate electricity is used for solving the problems referred to above that prior art exists.
Reach other relevant purposes for achieving the above object, the system that the utility model provides a kind of flue gas low-temperature waste heat that utilizes generator set to generate electricity, comprise first steam generating system, condensing water conduit, and be located at low-pressure heater and vapour condenser on the condensing water conduit, first steam generating system comprises low pressure (LP) cylinder, described low-pressure heater links to each other with described low pressure (LP) cylinder, also comprise flue gas waste heat recovery utilized device and second steam generating system, described flue gas waste heat recovery utilized device comprises endotherm section and heat release section, described endotherm section is located in the boiler flue, and described heat release section places on the condensed water branch road that parallel branch comes out from the described condensing water conduit; Second steam generating system comprises the second continuous steam turbine and second generator, and second steam turbine links to each other with described low pressure (LP) cylinder by extraction steam pipe, and described low pressure (LP) cylinder, second steam turbine all link to each other with described vapour condenser by the exhaust steam pipe.
Preferably, also comprise control system, first modulating valve of establishing at described condensed water branch road, second modulating valve of establishing at described extraction steam pipe, and being located at temperature transducer on the described endotherm section, described first modulating valve, second modulating valve and described temperature transducer all link to each other with described control system.
Preferably, described endotherm section is positioned at described boiler flue end.
Preferably, described low-pressure heater is one-level low-pressure heater or multistage low-pressure heater.
Preferably, the import and export of described condensed water branch road lay respectively at the both sides of described low-pressure heater.
Preferably, the used amount of drawing gas of described second steam turbine equates with the amount of drawing gas of saving by described flue gas waste heat recovery utilized device heating condensate water.
As mentioned above, the system that the flue gas low-temperature waste heat that utilizes generator set of the present utility model generates electricity, has following beneficial effect: can reclaim the low-temperature flue gas waste heat safely, and the waste heat that reclaims is generated electricity by the mode of cascade utilization, make power plant reach the purpose of energy-conserving and environment-protective; Reclaim low-temperature flue gas waste heat heating boiler water supply system, save with this and to draw gas, and drawing gas of will saving is directly used in generating, second steam turbine of selecting for use is selected at the parameter of drawing gas of saving, therefore than traditional former power generation system generating efficiency height that draws gas back, and do not destroy the balance of drawing gas of original steam power generation system, and reducing the influence to the normal operation of original system, energy-saving effect is significantly and the convenient amount of energy saving of adjusting on the Energy Management Contract project.
Description of drawings
Fig. 1 is shown as the system schematic that the flue gas low-temperature waste heat that utilizes generator set of the present utility model generates electricity.
The element numbers explanation
1 low-pressure heater
2 exhaust steam pipes
3 low pressure (LP) cylinders
4 extraction steam pipes
5 second modulating valve
6 vapour condenser
7 second steam turbine
8 second generators
9 boiler flues
10 flue gas waste heat recovery utilized devices
11 first modulating valve
12 condensed water branch roads
13 condensing water conduits
Embodiment
Below by particular specific embodiment mode of execution of the present utility model is described, person skilled in the art scholar can understand other advantages of the present utility model and effect easily by the disclosed content of this specification.
See also Fig. 1.Notice, the appended graphic structure that illustrates of this specification, ratio, size etc., equal contents in order to cooperate specification to disclose only, understand and reading for person skilled in the art scholar, be not in order to limit the enforceable qualifications of the utility model, so technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not influencing under the effect that the utility model can produce and the purpose that can reach, all should still drop on the technology contents that the utility model discloses and get in the scope that can contain.Simultaneously, quote in this specification as " on ", D score, " left side ", " right side ", " centre " reach the term of " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under no essence change technology contents, when also being considered as the enforceable category of the utility model.
As shown in Figure 1, the system that the utility model provides a kind of flue gas low-temperature waste heat that utilizes generator set to generate electricity, the excellent finger pure condensate of this generator set formula unit, it comprises first steam generating system, send the condensing water conduit 13 of water to boiler, and be located at low-pressure heater 1 and vapour condenser 6 on the condensing water conduit 13, first steam generating system comprises low pressure (LP) cylinder 3, the steam inlet of low-pressure heater 1 links to each other with low pressure (LP) cylinder 3, this first steam generating system is the power generation system in original generator set, also comprise flue gas waste heat recovery utilized device 10 and second steam generating system, flue gas waste heat recovery utilized device 10 comprises endotherm section and heat release section, endotherm section is located in the boiler flue 9, and heat release section places on the condensed water branch road 12 that parallel branch comes out from the condensing water conduit 13; Second steam generating system comprises that the second continuous steam turbine 7 and second generator, 8, the second steam turbine 7 link to each other with described low pressure (LP) cylinder 3 by extraction steam pipe 4, and low pressure (LP) cylinder 3, second steam turbine 6 all link to each other with vapour condenser 6 by exhaust steam pipe 2.The utility model has increased by second steam generating system on original first steam generating system basis, strengthened electricity, improved the smoke pre-heating utilization ratio simultaneously, it adopts flue gas waste heat recovery utilized device 10 is installed in the boiler flue 9, the absorption portion fume afterheat, then waste heat is discharged the condensed water of coming to from condensed water branch road 12, this part condensed water of heating was heated it in low-pressure heater 1 by drawing gas from low pressure (LP) cylinder 3 originally, therefore having saved this part draws gas, this part draws gas and enters into second steam turbine 7 by extraction steam pipe 4, and in second steam turbine, do work, this second steam turbine is not first steam turbine in original first steam generating system, it can utilize this part to draw gas, second steam turbine drives 8 actings of second generator and produces electric energy, and the exhaust steam of finishing merit enters into vapour condenser 6 by exhaust steam pipe 2.
The utility model reclaims the low-temperature flue gas waste heat, by the utilization of drawing gas that effectively is used to save former steam generator system to this waste heat, generate electricity by drawing gas of saving, improved the efficient utilization of low-temperature flue gas preheating with this, improve the generated energy of whole generating unit.
For ease of regulating, the import and export of above-mentioned condensed water branch road 12 lay respectively at the both sides of low-pressure heater 1, and it constitutes the structure in parallel with the condensing water conduit of low-pressure heater section.
The utility model also comprises control system, first modulating valve of establishing at condensed water branch road 12 11, second modulating valve of establishing at extraction steam pipe 45, and be located at temperature transducer on the endotherm section, first modulating valve 11, second modulating valve 5 and temperature transducer all link to each other with control system.At condensed water branch road 12 first modulating valve 11 is installed, can come the heating condensate water amount of flue gas waste heat recovery utilized device 10 is regulated by control system, regulate the endotherm section wall surface temperature of flue gas waste heat recovery utilized device 10 simultaneously, guarantee that it moves under the operating mode of safety.At extraction steam pipe 4 second modulating valve 5 is installed, second modulating valve links to each other with control system, when operation, can regulate the amount of drawing gas that enters second steam turbine 7 from low pressure (LP) cylinder 3 in real time, make steam generating system not be affected, this part amount of drawing gas should equate with the amount of drawing gas of saving by flue gas waste heat recovery utilized device 10 heating condensate waters.Namely the used amount of drawing gas of second steam turbine equates with the amount of drawing gas of saving by flue gas waste heat recovery utilized device heating condensate water.Above-mentioned endotherm section is positioned at the boiler flue end, can avoid influencing the heat of using of interior other equipment of boiler flue like this.Above-mentioned low-pressure heater 1 is one-level low-pressure heater or multistage low-pressure heater.
Drawing gas becomes exhaust steam after the acting in second steam turbine 7, exhaust steam enters vapour condenser 6 by exhaust steam pipe 2, gets back in the condensate system after the condensation.Second steam turbine 7 is low-pressure turbine in the present embodiment.
In sum, the system that the flue gas low-temperature waste heat that utilizes generator set of the present utility model generates electricity, heat the condensed water that heats with steam (being the steam in the low pressure (LP) cylinder) by flue gas heat, namely come heating condensate water with low-grade waste heat, save the steam that high-grade heat energy is arranged, and utilized drawing gas of saving to generate electricity, made heat energy realize cascade utilization, solve the problem that traditional recovery waste heat generating can't accurately be measured, improved utilization efficiency of heat energy greatly.So the utility model has effectively overcome various shortcoming of the prior art and the tool high industrial utilization.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not is used for restriction the utility model.Any person skilled in the art scholar all can be under spirit of the present utility model and category, and above-described embodiment is modified or changed.Therefore, have in the technical field under such as and know that usually the knowledgeable modifies or changes not breaking away from all equivalences of finishing under spirit that the utility model discloses and the technological thought, must be contained by claim of the present utility model.
Claims (6)
1. system that the flue gas low-temperature waste heat that utilizes generator set generates electricity, comprise first steam generating system, condensing water conduit (13), and be located at low-pressure heater (1) and vapour condenser (6) on the condensing water conduit (13), first steam generating system comprises low pressure (LP) cylinder (3), described low-pressure heater (1) links to each other with described low pressure (LP) cylinder (3), it is characterized in that, also comprise flue gas waste heat recovery utilized device (10) and second steam generating system, described flue gas waste heat recovery utilized device (10) comprises endotherm section and heat release section, described endotherm section is located in the boiler flue (9), and described heat release section places on the condensed water branch road (12) that parallel branch comes out from the described condensing water conduit; Second steam generating system comprises continuous second steam turbine (7) and second generator (8), second steam turbine (7) links to each other with described low pressure (LP) cylinder (3) by extraction steam pipe (4), and described low pressure (LP) cylinder (3), second steam turbine (7) all link to each other with described vapour condenser (6) by exhaust steam pipe (2).
2. the system that generates electricity of the flue gas low-temperature waste heat that utilizes generator set according to claim 1, it is characterized in that: also comprise control system, first modulating valve of establishing at described condensed water branch road (12) (11), second modulating valve of establishing at described extraction steam pipe (4) (5), and being located at temperature transducer on the described endotherm section, described first modulating valve (11), second modulating valve (5) and described temperature transducer all link to each other with described control system.
3. the system that generates electricity of the flue gas low-temperature waste heat that utilizes generator set according to claim 1, it is characterized in that: described endotherm section is positioned at described boiler flue end.
4. the system that generates electricity of the flue gas low-temperature waste heat that utilizes generator set according to claim 1, it is characterized in that: described low-pressure heater (1) is one-level low-pressure heater or multistage low-pressure heater.
5. the system that generates electricity of the flue gas low-temperature waste heat that utilizes generator set according to claim 1, it is characterized in that: the import and export of described condensed water branch road (12) lay respectively at the both sides of described low-pressure heater (1).
6. the system that generates electricity of the flue gas low-temperature waste heat that utilizes generator set according to claim 1, it is characterized in that: the used amount of drawing gas of described second steam turbine (7) equates with the amount of drawing gas of saving by described flue gas waste heat recovery utilized device (10) heating condensate water.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320117605XU CN203130171U (en) | 2013-03-15 | 2013-03-15 | System utilizing low temperature exhaust heat of flue gas of generating set for power generation |
| PCT/CN2013/079193 WO2014139253A1 (en) | 2013-03-15 | 2013-07-11 | System using low-temperature waste heat of gas of generator unit to generate power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320117605XU CN203130171U (en) | 2013-03-15 | 2013-03-15 | System utilizing low temperature exhaust heat of flue gas of generating set for power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203130171U true CN203130171U (en) | 2013-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320117605XU Expired - Fee Related CN203130171U (en) | 2013-03-15 | 2013-03-15 | System utilizing low temperature exhaust heat of flue gas of generating set for power generation |
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|---|---|
| CN (1) | CN203130171U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047647A (en) * | 2013-03-15 | 2014-09-17 | 上海伏波环保设备有限公司 | System utilizing smoke low-temperature residual heat of generator unit to generate power |
| CN104457297A (en) * | 2014-11-26 | 2015-03-25 | 上海宝钢节能环保技术有限公司 | Sintering waste heat recovery method and system |
-
2013
- 2013-03-15 CN CN201320117605XU patent/CN203130171U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104047647A (en) * | 2013-03-15 | 2014-09-17 | 上海伏波环保设备有限公司 | System utilizing smoke low-temperature residual heat of generator unit to generate power |
| CN104047647B (en) * | 2013-03-15 | 2015-12-02 | 上海伏波环保设备有限公司 | Utilize the system that the flue gas low-temperature waste heat of generator set generates electricity |
| CN104457297A (en) * | 2014-11-26 | 2015-03-25 | 上海宝钢节能环保技术有限公司 | Sintering waste heat recovery method and system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20160315 |