CN103967546A - Thermal power generation system - Google Patents
Thermal power generation system Download PDFInfo
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- CN103967546A CN103967546A CN201310028485.0A CN201310028485A CN103967546A CN 103967546 A CN103967546 A CN 103967546A CN 201310028485 A CN201310028485 A CN 201310028485A CN 103967546 A CN103967546 A CN 103967546A
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- heat
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- thermal source
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- generating system
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
The invention discloses a thermal power generation system and belongs to the field of thermal power generation. The thermal power generation system comprises a heat exchange device, a work done device and a working medium circulating device, wherein the heat exchange device is used for providing heat energy through a plurality of heat sources at different stages. The heat sources are divided into a one-stage heat source, a second-stage heat source and a third-stage heat source, wherein the one-stage heat source is a heat source for enabling steam to be overheat, the second-stage heat source is a heat source for enabling water to evaporate, and the third-stage heat source is a heat source used for heating water or preheating fuel and a comburent. After the adoption of the technical scheme provided by the invention, the availability loss of high temperature heat energy in the thermal power generation system can be lowered, and low-temperature heat energy is promoted to be used fully.
Description
Technical field
The present invention relates to thermal power generation field, refer to especially a kind of heat power generating system.
Background technique
In prior art, as shown in Figure 1, in the heat power generating system based on Lang Ken circulation, in boiler or heat exchanger, be generally to complete feedwater heating, evaporation and overheated process by single source.Owing to being subject to the impact (being mainly the different demands to temperature and heat) of hot working fluid physical property etc., there is the situation of the high-quality low use of heat energy in whole process, makes fire larger with loss, generally can reach 25%~30%.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of heat power generating system, can reduce the loss for fire of high temperature heat in heat power generating system, and promote making full use of of low temperature heat energy.
For solving the problems of the technologies described above, embodiments of the invention provide technological scheme as follows:
On the one hand, provide a kind of heat power generating system, comprise heat-exchanger rig, work done device and working medium circulation device, wherein, described heat-exchanger rig provides heat energy by the thermal source of a plurality of different brackets.
Further, in such scheme, described thermal source is divided into one-level thermal source, secondary source of heat and three grades of thermals source, and described one-level thermal source is for making the thermal source of steam superheating, secondary source of heat is the thermal source for evaporating the water, and three grades of thermals source are the thermal source of water supply heating or pre-heating fuel and oxidizer.
Further, in such scheme, the required heat energy of described heat-exchanger rig is composited by one-level thermal source, secondary source of heat and three grades of thermals source; Or
The required heat energy of described heat-exchanger rig is composited by one-level thermal source and secondary source of heat; Or
The required heat energy of described heat-exchanger rig is composited by one-level thermal source and three grades of thermals source; Or
The required heat energy of described heat-exchanger rig is composited by secondary source of heat and three grades of thermals source.
Further, in such scheme, every one-level thermal source is single thermal source or is formed by a plurality of combinations of sources of heat.
Further, in such scheme, described thermal source source includes but not limited to fossil fuel, discarded or association inflammable matter, biomass fuel, manually makes inflammable matter, solar energy, nuclear energy and waste heat.
Further, in such scheme, described work done device adopts separate unit steam turbine generator or many steam turbine generators.
Further, in such scheme, described work done device adopts single pressing system, multiple pressure system or flash system.
Further, in such scheme, described work done device adopts simple cycle, backheat circulation or reheat vapor cycle.
Further, in such scheme, described work done device is double-work medium cardiopulmonary bypass in beating heart.
Further, in such scheme, the working medium of described heat power generating system includes but not limited to water.
Embodiments of the invention have following beneficial effect:
In such scheme, in heat source side, the thermal source of different brackets is carried out compoundly, adopt the method for multilevel heat source counterpart heat exchange, complete respectively steam superheating, evaporation, feedwater heating or pre-heating fuel and oxidizer, meanwhile, in working medium side, adopt the combined cycle of one or more parameter grades.Technological scheme of the present invention is according to the endothermic character of working medium, utilize in the heat energy displacement single-stage thermal source heat power generating system of lower temperature (suitable temperature) by the heat energy of high-quality low use, to the heat energy of the higher temperature being displaced carry out high-quality high with or be used for driving making full use of of lower temperature heat energy.When causing fire by the larger problem of loss due to high-quality low use in reducing the circulation of single-stage thermal source thermal power, in also can promoting, the making full use of of low temperature heat energy.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the heat-exchanger rig in prior art single source heat power generating system;
Fig. 2 is the structural representation of embodiment of the present invention heat power generating system;
Fig. 3 is that embodiment of the present invention heat power generating system heat-exchanger rig is by the compound schematic diagram forming of a plurality of grade thermals source.
Embodiment
For technical problem, technological scheme and advantage that embodiments of the invention will be solved are clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Embodiments of the invention are generally to complete feedwater heating, evaporation and overheated process by single source for heat power generating system in prior art, make fire larger with loss, and in, low temperature heat energy conversion efficiency of thermoelectric is low, the problem that is difficult to make full use of, a kind of heat power generating system is provided, can reduce the loss for fire of high temperature heat in single source heat power generating system, and promote making full use of of low temperature heat energy.
The embodiment of the present invention provides a kind of heat power generating system, comprises heat-exchanger rig, work done device and working medium circulation device, and wherein, described heat-exchanger rig provides heat energy by the thermal source of a plurality of different brackets.
Conventional single source heat power generating system mainly consists of three parts, and the one, burning, thermal source heat release and working medium heat absorbing part (hereinafter to be referred as heat exchanging part), be mainly comprised of equipment such as boiler, heat exchangers; The 2nd, working medium heat release, work done part (hereinafter to be referred as work done part), be mainly comprised of Turbo-generator Set; The 3rd, working medium compression and cyclic part (hereinafter to be referred as working medium circulation part), be mainly comprised of equipment such as feed water pump, oxygen-eliminating device, feed water preheaters; Between each equipment, by respective line, connect.
As shown in Figure 2, heat power generating system of the present invention consists of heat-exchanger rig, work done device and working medium circulation device, and wherein A district is heat-exchanger rig, and B district is work done device, and C district is working medium circulation device.The function of each device in heat power generating system is identical with conventional single source heat power generating system, between each device, by respective line, connects.
Generally, people are divided three classes heat energy according to temperature difference: warm energy and 300 ℃ of following low temperature heat energies in 700 ℃ of above high temperature heat, 350 ℃~700 ℃ of left and right.In heat power generating system of the present invention, according to the endothermic character of working medium, for realizing cascade utilization and being convenient to, set forth, thermal source has been adopted to new grading method, the standard of classification is not only seen the temperature of thermal source, also will see the endothermic temperature of working medium, and the endothermic temperature of working medium depends on the setting of heat power generating system parameter, it is changed with hot merit, and fire is less with loss, heat is fully utilized, system generated energy is higher into policy setting.
Wherein, the grade of thermal source does not refer to the number of thermal source, and refers to a certain temperature range.In actual applications, may there is the situation of the heat of certain one-level thermal source and the peer of working medium caloric receptivity Incomplete matching, now need upper level thermal source to supplement.When working medium side parameter changes, the temperature range of corresponding stage thermal source also can change thereupon in addition, and therefore, the heat source temperature interval of certain one-level is not fixed.
Every one-level thermal source can be single thermal source, can be also to be formed by a plurality of combinations of sources of heat.Further, the grade of thermal source is not only relevant with heat source temperature, also relevant with the endothermic temperature of working medium.After having selected suitable working medium side parameter, according to the demand of working medium side, can to thermal source, carry out classification by the principle of " temperature counterpart ", and configure thermal source.Particularly, the present invention is divided into one-level thermal source, secondary source of heat and three grades of thermals source by thermal source, the working medium of heat power generating system of the present invention includes but not limited to water, described one-level thermal source can be for for making the thermal source of steam superheating, secondary source of heat can be the thermal source for evaporating the water, and three grades of thermals source can be the thermal source of water supply heating or pre-heating fuel and oxidizer.With the one-level thermal source difference of can originating, also can temperature different.Described thermal source source includes but not limited to fossil fuel, discarded or association inflammable matter, biomass fuel, manually makes inflammable matter, solar energy, nuclear energy and all kinds of waste heat.
Particularly, as shown in Figure 3, in the embodiment of the present invention, the required heat energy of heat-exchanger rig can be composited by one-level thermal source, secondary source of heat and three grades of thermals source.Further, the required heat energy of heat-exchanger rig can also be composited by one-level thermal source and secondary source of heat; Or be composited by one-level thermal source and three grades of thermals source; Or be composited by secondary source of heat and three grades of thermals source.As shown in Figure 3, heat-exchanger rig can be integral type (combined type), can be also split type.By different brackets and/or different types of thermal source, be combined with each other, complete the diabatic process to working medium, difference due to thermal source source, the related equipment of heat-exchanger rig includes pressurized water reactor one loop of take in boiler that various inflammable matters are primary energy, solar thermal collector, various afterheat heat exchanger, nuclear energy etc., between each equipment, by respective line, connects.
Generally, in Fig. 1, superheat section outlet A point temperature is higher than superheat section outlet a point temperature in Fig. 3, equally, in Fig. 1, evaporator section outlet B point temperature is higher than evaporator section outlet b1 point and b2 point temperature in Fig. 3, and this is the multilevel heat source heat power generating system fire high basic reason of efficiency of the present invention.Owing to having used the thermal source of suitable temperature (lower temperature) to replace in original single source system by the heat energy of " high-quality low use ", this part high temperature heat being gone out by " displacement " on the one hand can be according to the principle of " temperature counterpart " for the working medium heat exchange higher with working medium side temperature parameter, can be used as on the other hand " driving " thermal source of low-temperature heat source, combine with low-temperature heat source, form the compound heat power generating system of another multilevel heat source, solve high temperature heat deficiency or disappearance in single low-temperature heat source heat power generating system, cause low temperature heat energy to be difficult to the problem for generating.
The combined cycle of heat power generating system of the present invention, had both comprised the compound of heat source side, also comprised the compound of working medium side.The compound of heat source side refers to according to the corresponding use of the demand of working medium side thermal source not at the same level, and multilevel heat source is compounded in a thermal power circulatory system.Compound the referring in working medium side of working medium side adopts one or more levels parameter, matches realize cascade utilization and make full use of with heat source side.The embodiment of the present invention can be usingd water as working medium, also can using other material (as low boiling working fluid) as working medium, can also adopt two kinds of different working mediums simultaneously.
The work done device of heat power generating system of the present invention both can adopt single pressing system, also can adopt multiple pressure system or flash system.Work done device can adopt one or more levels parameter to form circulation, and when adopting different parameters grade to form circulation time, working medium circulation device adopts the water supply system of different pressures grade.Further, when heat power generating system adopts two kinds of different working mediums, work done device is double-work medium cardiopulmonary bypass in beating heart, and in addition, backheat circulation, reheat vapor cycle be selected to adopt or do not adopted to work done device also can according to thermal source situation.
The capital equipment of work done device is Turbo-generator Set, and unit can be separate unit steam turbine generator, can be also many steam turbine generators.
Heat power generating system of the present invention, in heat source side, the thermal source of different brackets is carried out compoundly, adopt the method for multilevel heat source counterpart heat exchange, complete respectively steam superheating, evaporation, feedwater heating or pre-heating fuel and oxidizer, meanwhile, in working medium side, adopt the combined cycle of one or more parameter grades.Technological scheme of the present invention is according to the endothermic character of working medium, utilize in the heat energy displacement single-stage thermal source heat power generating system of lower temperature (suitable temperature) by the heat energy of high-quality low use, to the heat energy of the higher temperature being displaced carry out high-quality high with or be used for driving making full use of of lower temperature heat energy.When causing fire by the larger problem of loss due to high-quality low use in reducing the circulation of single-stage thermal source thermal power, in also can promoting, the making full use of of low temperature heat energy.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a heat power generating system, comprises heat-exchanger rig, work done device and working medium circulation device, it is characterized in that, described heat-exchanger rig provides heat energy by the thermal source of a plurality of different brackets.
2. heat power generating system according to claim 1, it is characterized in that, described thermal source is divided into one-level thermal source, secondary source of heat and three grades of thermals source, described one-level thermal source is for making the thermal source of steam superheating, secondary source of heat is the thermal source for evaporating the water, and three grades of thermals source are the thermal source of water supply heating or pre-heating fuel and oxidizer.
3. heat power generating system according to claim 2, is characterized in that,
The required heat energy of described heat-exchanger rig is composited by one-level thermal source, secondary source of heat and three grades of thermals source; Or
The required heat energy of described heat-exchanger rig is composited by one-level thermal source and secondary source of heat; Or
The required heat energy of described heat-exchanger rig is composited by one-level thermal source and three grades of thermals source; Or
The required heat energy of described heat-exchanger rig is composited by secondary source of heat and three grades of thermals source.
4. heat power generating system according to claim 2, is characterized in that, every one-level thermal source is single thermal source or is formed by a plurality of combinations of sources of heat.
5. heat power generating system according to claim 2, is characterized in that, described thermal source source includes but not limited to fossil fuel, discarded or association inflammable matter, biomass fuel, manually makes inflammable matter, solar energy, nuclear energy and waste heat.
6. heat power generating system according to claim 2, is characterized in that, described work done device adopts separate unit steam turbine generator or many steam turbine generators.
7. heat power generating system according to claim 2, is characterized in that, described work done device adopts single pressing system, multiple pressure system or flash system.
8. heat power generating system according to claim 2, is characterized in that, described work done device adopts simple cycle, backheat circulation or reheat vapor cycle.
9. heat power generating system according to claim 2, is characterized in that, described work done device is double-work medium cardiopulmonary bypass in beating heart.
10. heat power generating system according to claim 2, is characterized in that, the working medium of described heat power generating system includes but not limited to water.
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Citations (4)
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CN201574792U (en) * | 2009-12-11 | 2010-09-08 | 中冶京诚工程技术有限公司 | Waste heat generation system |
CN102454440A (en) * | 2010-10-20 | 2012-05-16 | 中国科学院工程热物理研究所 | Board slot combined solar energy and thermal power station complementary generating system |
CN102690071A (en) * | 2012-05-30 | 2012-09-26 | 陕西大唐新能电力设计有限公司 | Graded energy utilization system used in cement production |
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- 2013-01-25 CN CN201310028485.0A patent/CN103967546A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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US7197876B1 (en) * | 2005-09-28 | 2007-04-03 | Kalex, Llc | System and apparatus for power system utilizing wide temperature range heat sources |
CN201574792U (en) * | 2009-12-11 | 2010-09-08 | 中冶京诚工程技术有限公司 | Waste heat generation system |
CN102454440A (en) * | 2010-10-20 | 2012-05-16 | 中国科学院工程热物理研究所 | Board slot combined solar energy and thermal power station complementary generating system |
CN102690071A (en) * | 2012-05-30 | 2012-09-26 | 陕西大唐新能电力设计有限公司 | Graded energy utilization system used in cement production |
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Application publication date: 20140806 |