CN103883372B - Symmetric double drives low-temperature waste heat power generation system - Google Patents
Symmetric double drives low-temperature waste heat power generation system Download PDFInfo
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- CN103883372B CN103883372B CN201310745116.3A CN201310745116A CN103883372B CN 103883372 B CN103883372 B CN 103883372B CN 201310745116 A CN201310745116 A CN 201310745116A CN 103883372 B CN103883372 B CN 103883372B
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Abstract
The invention discloses symmetrical double-driving ejector half low-temperature waste heat power generation system, including heat collection and energy conversion part, the heat energy of low temperature exhaust heat converts to steam drive decompressor rotate, drive electrical generators rotates, output electric energy is incorporated to power system bulk power grid after current transformer conversion, or be incorporated to the minor scale power net of inside plants, or power to individual loads.Decompressor lays respectively at the front and back end of electromotor, symmetrical driving electromotor；Rotate under the driving of two decompressors in front and back end, cancelled out each other axial thrust by the decompressor of front and back end, reduce bearing friction loss so that electromotor has significantly high reliability, increase the service life of electromotor, improve whole system efficiency.
Description
Technical field
The present invention relates to new symmetric double and drive low-temperature waste heat power generation system, belong to high-speed electric expreess locomotive design, converters and low temperature exhaust heat and reclaim field.
Background technology
Modern times industrial civilization emergence and the developing rapidly of countries in the world economy, have benefited from fossil energy, such as oil, natural gas, coal, with the extensive exploitation of nuclear energy and use.Last century middle and late stage, world population increases sharply, quickly increase with the economy that resource and environment are cost, tellurian resource is at an unprecedented rate consumed totally, simultaneously, the growth of population and expanding economy, it is day by day serious that the environment also depended on for existence to the mankind causes immense pressure, environmental pollution and global warming issue.Although; improving efficiency of energy utilization can alleviating energy crisis to a certain extent; but can not fundamentally solve energy scarcity problem; so wanting the stable, sustained and rapid growth realizing World Economics; it is necessary for first solving energy problem; the regenerative resource of exploitation cleaning, it is achieved the sustainable use of the energy.
In the exploitation process of new forms of energy, wind energy, solar energy, biomass energy, ocean energy, geothermal energy equal energy source obtain utilization gradually, the particularly national support on policy to new energy development and utilization recent years and subsidy, the new forms of energy such as wind energy and solar energy are made to obtain exploitation, according to incompletely statistics, reach 44.733MW by the end of Wind Power In China accumulation installed capacity in 2010, become the country that world's installed capacity is maximum.The development of wind-powered electricity generation so that power electronics and transformation of electrical energy technology reach its maturity, and have accumulated rich experience, and the advantage of wind-driven generator and converter structure and control, in the application of wind-powered electricity generation, is embodied.
The fast development of China's industry is based upon on the basis once utilized of resource and the energy, and the utilization ratio of its energy is not high, and a lot of energy cannot be recycled after once utilizing, and causes very big destruction to environment.For manufacturers such as sulphuric acid, cement, glass, iron and steel, a large amount of used heat, waste gas, the residual heat resources such as cigarette of giving up about account for the 20% of industry total energy consumption.Residual heat resources substantially can be divided into: high temperature (temperature is higher than 650 DEG C), middle temperature (temperature is between 230 DEG C-650 DEG C), low temperature (temperature is below 230 DEG C).At present, middle high-temperature residual heat is obtained by, and the UTILIZATION OF VESIDUAL HEAT IN of low temperature (less than 230 DEG C) is little, and utilization ratio is very low.National governments and energy company have put into substantial amounts of man power and material and have researched and developed heat recovery and electricity generation grid-connecting, policy that a series of relevant residual heat resources such as " 2010 cogeneration of heat and power development plans and the year two thousand twenty long-range objectives " are recycled, the appearance of measure, research and development and utilization for China's low-temperature cogeneration technology provide policy safeguard and scientific research supports.
China is vast in territory, geothermal energy resources enrich, especially with in, cryogenically heat storage capacity is the abundantest.At present, due to geotemperature low (less than 200 DEG C), geothermal power generation development cost height, geothermal utilization is substantially at the stage of directly utilizing, industrial processes, civil heating and air-conditioning, bathing, medical treatment, agricultural greenhouse, field irrigation, soil are heated, aquaculture, its feeding etc., and efficiency is very low, and the grid-connected utilization ratio of the cogeneration based on electromotor of early stage is low, electromotor loss is big, power factor is low, and volume is big, and noise jamming is very big.Underground heat (or waste heat) is heated low boiling (< 50 DEG C) medium by grid-connected system low-temperature waste heat power generation system, so as to become gaseous state, and promote decompressor drive electrical generators to rotate under pressure, produce AC energy, and change, by this current transformer, frequency and the voltage that the AC energy feed-in electrical network with electrical network same frequency or other individual loads need into, it is achieved that low temperature underground heat (or waste heat) converts available electric energy to.Being achieved that low temperature underground heat (or waste heat) converts available electric energy to, the warm water after being used to geothermal power generation can be also used for domestic life, greatly improves the utilization ratio of underground heat.
Single driving afterheat generating system energy conversion efficiency is low, and owing to electromotor is more than being subject to radial stress, is additionally subjected to axial stress, discontinuity, and the requirement of bearing is significantly high, and reliability is low, is not suitable for the occasion that rotating speed is significantly high.
Summary of the invention
The purpose of the present invention existing domestic organic Rankine bottoming cycle afterheat generating system energy conversion efficiency is low, service life is short, the problem of maintenance period length, it is provided that a kind of efficiently, symmetric double that reliability is high drive low-temperature waste heat power generation system.
In order to realize object above, the present invention by the following technical solutions: symmetrical drive low-temperature waste heat power generation system, including including vaporizer, decompressor I, decompressor II, condenser, working medium pump, air inlet adjustment valve, give vent to anger adjustment valve, electromotor.The port of export of condenser is connected to vaporizer by working medium pump；Described decompressor has the expander inlet being connected with vaporizer and top setting the expander outlet being connected with condenser, decompressor I, the front and back axle stretch end of II electromotor, axle stretches double; two flat keys transmission moment of torsion that place is symmetrical, and electromotor rotates under double; two decompressors drive and externally exports electric energy.After current transformer converts, it is incorporated to power system bulk power grid, or is incorporated to the minor scale power net of inside plants, or power to individual loads, be achieved that low temperature underground heat (or waste heat) converts available electric energy to.Prevent the working medium in electromotor and decompressor from circulating mutually；Carry out special O at electromotor front and rear cover place and carry out movable sealing；Described electromotor selects coolant the same with the medium of acting, support is respectively equipped with the cooling liquid inlet being connected with working medium pump and the cooling liquid outlet being connected with condenser, electromotor includes rotor part and has the stator component of winding, cool down by cooling medium, cooling medium is freon or air, the body rotor making high speed rotating is cooled down fully, effectively reduces temperature of rotor.The horizontal installation of electrical power generators machine, described electromotor is influence generator, electricity excitation synchronous generator, magneto alternator or switch reluctance generator.
Electricity generation system adopts symmetric double decompressor to drive and produces electric energy, and decompressor is radial direction shaft flow structure.
The acting medium of institute's vaporizer output is divided into two branch roads through flow divider, drives two decompressors I, decompressors II to rotate respectively；Decompressor I, decompressor II are directly anchored to the front and back axle stretch end of electromotor, and axle stretches double; two flat keys transmission moment of torsion that place is symmetrical, drives electromotor rotary electrification.
Described electromotor adopts horizontal installation.
Described step generator speed is high, and efficiency is high；Adopt Y connection winding construction, the Eliminate highter harmonic impact on rotor heating.Selection of Bearings high speed contact bearing or non-contact bearing.
Described electromotor output electric energy electromotor output electric energy after current transformer converts is incorporated to power system bulk power grid after current transformer converts, or is incorporated to the minor scale power net of inside plants, or powers to individual loads.
The present invention is compared with prior art, have the advantage that for waste heat of plant, the low-temperature heat source such as mass-energy, solar energy, collected by native system convert to electrical network same frequency, with the AC energy of amplitude, power system bulk power grid it is incorporated to after conversion, or be incorporated to the minor scale power net of inside plants, or power to individual loads；There is very strong anti-interference and low voltage ride-through capability.Described decompressor I, decompressor II lay respectively at the front and back end of electromotor, symmetrical driving electromotor；Two, front and back end decompressor I, decompressor II driving under rotate, cancelled out each other axial thrust by the decompressor I of front and back end, decompressor II, reduce local stress or moment of torsion, reduce bearing friction loss, electromotor is made to have significantly high reliability, increase the service life of electromotor, improve whole system efficiency.
Accompanying drawing explanation
Fig. 1 symmetric double drives low-temperature waste heat power generation system topology diagram
In figure: vaporizer 1, decompressor I 2, condenser 3, working medium pump 4, electromotor 5, decompressor II 6, bearing 7, flow divider the 8, first air inlet adjustment valve the 9, second air inlet adjustment valve 10, current transformer 11, flat key 12.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, present disclosure is described in further details.
Embodiment: refer to shown in Fig. 1, symmetric double drives low-temperature waste heat power generation system, including vaporizer 1, decompressor I 2, decompressor II 6, condenser 3, working medium pump 4, flow divider 8, first air inlet adjustment valve the 9, second air inlet adjustment valve 10, electromotor 5.The outfan of condenser 3 is connected to vaporizer 1 by working medium pump 4；Described decompressor I 2 and decompressor II 6 have the outlet E of the outlet F decompressor II 6 of the decompressor I 2 import decompressor II 6 import G being connected with vaporizer 1 and the decompressor I 2 that is connected with condenser 3；Electromotor 5 is connected to decompressor I 2 and the centre of decompressor II 6, rotates under the dragging of decompressor I 2 and decompressor II 6；Electromotor 5 rotor is high speed rotating under bearing 7 supports, and externally exports electric energy after current transformer 11 converts.It is incorporated to power system bulk power grid after conversion, or is incorporated to the minor scale power net of inside plants, or power to individual loads.
The present embodiment work process is as follows: the low-temperature heat sources such as the used heat of factory or underground heat, temperature enters the vaporizer 1 lower boiling medium of post-heating with the form of hot water more than 60 °, liquid low boiling point working medium becomes gaseous state after being heated, front and back axle stretch end through pipeline pushing generator 5, decompressor I 2 rotates, and axle stretches the flat key transmission energy that 7 places are symmetrical.The gaseous medium done work returns to condenser 3 through pipeline, and after cold water takes away the heat of gaseous medium, gaseous medium becomes liquid, returns in vaporizer 1 and continue cycling through under the pressure of liquid medium working medium pump again.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and this embodiment is also not used to the scope of the claims of the restriction present invention, and all equivalences done without departing from the present invention are implemented or change, all should comprise with in the scope of the claims of this case.
Claims (5)
1. symmetric double drives low-temperature waste heat power generation system, it is characterised in that: include vaporizer (1), decompressor I (2), decompressor II (6), condenser (3), working medium pump (4), flow divider (8), the first air inlet adjustment valve (9), the second air inlet adjustment valve (10), electromotor (5), flat key (12)；The outfan of condenser (3) is connected to vaporizer (1) by working medium pump (4)；Described decompressor I (2) and decompressor II (6) have the import of decompressor I (2) and the decompressor II (6) being connected with vaporizer (1) and the outlet of the decompressor I (2) being connected with condenser (3) and decompressor II (6)；Decompressor I (2) and decompressor II (6) are directly anchored to the front and back axle stretch end of electromotor (5), moment of torsion is transmitted with symmetric double flat key (12), decompressor I (2) and decompressor II (6) drive generator amature high speed rotating under bearing (7) supports, cancelled out each other axial thrust by the decompressor I (2) of front and back end, decompressor II (6), reduce local stress or moment of torsion, after current transformer (11) converts, externally export electric energy；The acting medium that described vaporizer (1) exports is divided into two branch roads through flow divider (8), and wherein a driving decompressor I (2) rotates, and another driving decompressor II (6) rotates.
2. symmetric double drives low-temperature waste heat power generation system according to claim 1, it is characterised in that: electromotor (5) output electric energy is incorporated to power system bulk power grid after current transformer (11) converts, or is incorporated to the minor scale power net of inside plants, or powers to individual loads.
3. symmetric double drives low-temperature waste heat power generation system according to claim 1, it is characterised in that: described electromotor (5) includes rotor part and has the stator component of winding, cools down by cooling medium, and cooling medium is freon or air.
4. symmetric double drives low-temperature waste heat power generation system according to claim 1, it is characterised in that: electromotor (5) horizontal installation, described electromotor (5) is influence generator, electricity excitation synchronous generator, magneto alternator or switch reluctance generator.
5. symmetric double drives low-temperature waste heat power generation system according to claim 1, it is characterised in that: the bearing (7) of described electromotor (5) selects high speed contact bearing or non-contact bearing.
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| CN201310745116.3A CN103883372B (en) | 2013-12-31 | 2013-12-31 | Symmetric double drives low-temperature waste heat power generation system |
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| CN201310745116.3A CN103883372B (en) | 2013-12-31 | 2013-12-31 | Symmetric double drives low-temperature waste heat power generation system |
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| CN103883372B true CN103883372B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104358597A (en) * | 2014-11-13 | 2015-02-18 | 叶金辉 | Magnetic suspension power generation device for absorbing low-grade residual heat |
| RU2577678C1 (en) * | 2014-12-03 | 2016-03-20 | Общество с ограниченной ответственностью Научно-производственное предприятие "Донские технологии" | High-speed turbine generator with low-power steam drive |
| CN110242375A (en) * | 2019-05-23 | 2019-09-17 | 华电电力科学研究院有限公司 | A kind of twin-stage organic rankine cycle system and its working method based on air-bearing |
| CN112282871A (en) * | 2020-09-16 | 2021-01-29 | 华电电力科学研究院有限公司 | Symmetrically-arranged high-speed double-turbine distributed excess pressure power generation system |
| CN112039125A (en) * | 2020-11-03 | 2020-12-04 | 成都署信科技有限公司 | ORC system based on switched reluctance motor and control method |
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Effective date of registration: 20171228 Address after: No. 123, Xingyuan Road, Jingzhen, mayor of Jiangyin, Wuxi, Jiangsu Patentee after: Jiangyin Hong Xu environmental protection electric technology Co., Ltd. Address before: Hunan University Science Park Venture Building 186 No. 410082 Hunan city high tech Development Zone Changsha Changsha Valley Court Road, No. 336 Patentee before: The electric Science and Technology Ltd. of Hunan Qi Lida |
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Effective date of registration: 20200601 Address after: 410006 Hunan city high tech Development Zone Changsha Valley Court Road, No. 186 Patentee after: HUNAN QILIDA ELECTRIC TECHNOLOGY Co.,Ltd. Address before: No. 123, Xingyuan Road, Jingzhen, mayor of Jiangyin, Wuxi, Jiangsu Patentee before: Jiangyin Hong Xu environmental protection electric technology Co.,Ltd. |