CN210033553U - ORC magnetic suspension power generation system for cascade utilization of medium-low temperature geothermal working medium - Google Patents
ORC magnetic suspension power generation system for cascade utilization of medium-low temperature geothermal working medium Download PDFInfo
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- CN210033553U CN210033553U CN201920813625.8U CN201920813625U CN210033553U CN 210033553 U CN210033553 U CN 210033553U CN 201920813625 U CN201920813625 U CN 201920813625U CN 210033553 U CN210033553 U CN 210033553U
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Abstract
The utility model relates to a middle and low temperature terrestrial heat working medium cascade utilization ORC magnetic suspension power generation system, which comprises a first-stage ORC generator set and a second-stage ORC generator set; the first-stage ORC generator set comprises a first circulating pump for pressurizing a first working medium, a first-stage evaporator for evaporating the first working medium, a first-stage magnetic suspension generator connected with the first-stage evaporator, and a second-stage evaporator connected with the first-stage magnetic suspension generator for evaporating a second working medium; the two-stage ORC generator set comprises a second circulating pump for pressurizing a second working medium, a two-stage evaporator, a two-stage magnetic suspension generator connected with the two-stage evaporator, and a first condenser connected with the two-stage evaporator and the two-stage magnetic suspension generator respectively. The utility model provides a low problem of low temperature geothermal power generation efficiency among the prior art.
Description
Technical Field
The utility model relates to a geothermal energy power generation technical field especially relates to well low temperature geothermol power working medium step utilizes ORC magnetic suspension power generation system.
Background
With the gradual exhaustion of fossil energy, geothermal energy is a competitive member of green energy utilization in the future due to the advantages of abundant reserves, wide distribution, good stability, no interference from external factors such as seasons, environment, climate, day and night, and the like. China has abundant geothermal energy reserves, annual exploitable amount is equivalent to 26 hundred million tons of standard coal, and more than 70 percent of exploitable resources belong to medium and low temperature geothermal resources. However, medium-low temperature geothermal resources are used as low-grade energy sources, are difficult to develop and utilize, and mainly use direct heat utilization, such as hot springs, heating and the like at present. Organic Rankine Cycle (ORC) is adopted in part of regions, and low-boiling organic working media are used for medium and low temperature geothermal steam turbine power generation, but the low electric efficiency (less than 10%) restricts the popularization of medium and low temperature geothermal power generation utilization. The low power generation efficiency (less than 10%) of medium-low temperature geothermal resources restricts the popularization of power generation and utilization.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
In view of above-mentioned prior art not enough, the utility model aims at providing well low temperature geothermol power working medium step utilizes ORC magnetic suspension power generation system, aims at solving the current problem that low in the utilization low temperature geothermol power generating efficiency.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted as follows:
ORC magnetic suspension power generation system is utilized to well low temperature geothermol power working medium cascade, wherein, includes:
the ORC generator set comprises a first-stage ORC generator set and a second-stage ORC generator set;
the first-stage ORC generator set comprises a first circulating pump for pressurizing a first working medium, a first-stage evaporator for evaporating the first working medium, a first-stage generator connected with the first-stage evaporator, and a second-stage evaporator connected with the first-stage generator for evaporating a second working medium;
the two-stage ORC generator set comprises a second circulating pump for pressurizing a second working medium, a two-stage evaporator, a two-stage generator connected with the two-stage evaporator and a first condenser connected with the two-stage generator.
The ORC magnetic suspension power generation system is characterized in that the medium-low temperature geothermal working medium cascade utilization ORC magnetic suspension power generation system comprises a first-stage ORC generator set and an absorption type refrigerating device, wherein the absorption type refrigerating device is used for carrying out second-stage cooling on a first working medium subjected to heat exchange and cooling with a second-stage evaporator.
The medium and low temperature geothermal working medium cascade utilization ORC magnetic suspension power generation system, wherein, the absorption refrigeration device comprises:
the generator is used for concentrating a third working medium, the second condenser is connected with the generator, the third condenser is connected with the secondary evaporator, and the absorber is connected with the third condenser;
the first outlet of the generator is connected with the first inlet of the second condenser, the first outlet of the second condenser is connected with the first inlet of the third condenser, and the first outlet of the third condenser is connected with the first inlet of the absorber;
the first outlet of the secondary evaporator is connected with the second inlet of the third condenser; a second outlet of the third condenser is connected with an inlet of the first-stage evaporator through the first circulating pump;
the first outlet of the absorber is connected with the inlet of the generator, and the second outlet of the generator is connected with the second inlet of the absorber.
The medium-low temperature geothermal working medium cascade utilization ORC magnetic suspension power generation system is characterized in that the primary generator and the secondary generator are both magnetic suspension turbine generators.
The ORC magnetic suspension power generation system is used for cascade utilization of the medium-low temperature geothermal working medium, wherein the boiling point of the first working medium is higher than that of the second working medium.
The medium-low temperature geothermal working medium cascade utilization ORC magnetic suspension power generation system is characterized in that the second working medium is R123 or R124.
The ORC magnetic suspension power generation system is used for cascade utilization of the medium-low temperature geothermal working medium, wherein a throttle valve is arranged between the second condenser and the third condenser.
The ORC magnetic suspension power generation system is used for cascade utilization of the medium-low temperature geothermal working medium, wherein a third circulating pump is arranged between the outlet of the absorber and the generator.
The ORC magnetic suspension power generation system is used for cascade utilization of the medium-low temperature geothermal working medium, wherein the third working medium is a binary working medium.
The ORC magnetic suspension power generation system is used for cascade utilization of the medium-low temperature geothermal working medium, wherein the third working medium is a lithium bromide solution.
Has the advantages that: the utility model provides a well low temperature geothermol power working medium step utilizes ORC magnetic suspension power generation system, utilizes through working medium and geothermal energy step and has effectively improved well low temperature geothermol power heat utilization efficiency, has promoted the geothermal power total amount.
Drawings
Fig. 1 is a block diagram of a first medium-low temperature geothermal working medium cascade ORC magnetic levitation power generation system provided by an embodiment of the present invention.
Fig. 2 is a block diagram of a second medium-low temperature geothermal working medium cascade ORC magnetic levitation power generation system provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the utility model discloses a well low temperature geothermol power working medium cascade utilizes ORC magnetic suspension power generation system, the ORC generating set includes two sets ofly and one-level ORC generating set and second grade ORC generating set promptly, wherein, one-level ORC generating set include one-level evaporimeter 10, with the one-level generator 101 that one-level evaporimeter 10 is connected, with the second grade evaporimeter 20 that one-level generator 101 is connected, one-level generator 101 be magnetic suspension turbine generator, with second grade evaporimeter 20 and the first circulating pump 102 that one-level evaporimeter 10 is connected.
Specifically, the power generation process of the primary ORC generator set relates to a primary organic Rankine cycle, namely, medium-low temperature geothermal water passes through a primary evaporator 10, so that a first working medium passing through the primary evaporator absorbs heat and is evaporated to form high-temperature high-pressure steam, the high-temperature high-pressure steam enters a primary magnetic suspension turbine generator 101 to be expanded and do work to drive the primary magnetic suspension generator to generate power, exhaust steam at an outlet of the primary magnetic suspension generator then enters a secondary evaporator 20 to be condensed and provide heat for the secondary organic Rankine cycle, and the condensed liquid working medium returns to the primary evaporator 10 through a first circulating pump 102.
The two-stage ORC generator set comprises the two-stage evaporator 20, a two-stage generator 201 connected with the two-stage evaporator 20, and a first condenser 202 respectively connected with the two-stage evaporator 20 and the two-stage generator 201; the secondary generator 201 is a magnetic suspension turbine generator.
Specifically, in the secondary organic rankine cycle, a second organic working medium absorbs heat energy in the exhaust steam discharged from the outlet of the primary magnetic suspension generator 101 in the secondary evaporator 20 and evaporates into second organic working medium steam, then the second organic working medium steam with higher temperature and pressure enters the secondary magnetic suspension generator 201 to expand and do work to drive the secondary magnetic suspension generator to generate electricity, the exhaust steam at the outlet of the secondary magnetic suspension generator 201 enters the first condenser 202 to be condensed, and finally, the condensed liquid second organic working medium returns to the secondary evaporator 20 through the second working medium pump 203. By additionally arranging the two-stage ORC generator set, steam generated in the one-stage ORC generator set is reused, and the utilization efficiency of heat is improved.
Referring to fig. 2, in some embodiments, in order to improve the heat utilization rate, an absorption refrigeration device is added in the primary ORC generator set to perform a secondary cooling on the first working medium after the first working medium is cooled by heat exchange with the secondary evaporator. The absorption refrigeration device comprises a third condenser 30, an absorber 303, a third circulating pump 304, a generator 40, a second condenser 301 and a throttle valve 302 which are sequentially connected in a circulating manner. The generator comprises a first outlet for discharging steam, a second outlet for discharging concentrated working medium liquid and an inlet for feeding diluted liquid working medium. The second condenser is a water-cooled condenser and comprises a working medium pipeline and a cold water pipeline, and the working medium pipeline comprises a first inlet and a first outlet. The third condenser comprises a first working medium pipeline for circulation of a first working medium and a third working medium pipeline for circulation of third working medium steam, the third working medium pipeline comprises a first inlet and a first outlet, and the first working medium pipeline comprises a second inlet and a second outlet. The absorber comprises a first inlet for the liquid working medium condensed by the third condenser to enter and a second inlet for the concentrated liquid condensed by the generator to enter.
A first outlet of the generator 40 is connected with a first inlet of the second condenser 301, and a second outlet of the generator 40 is connected with a second inlet of the absorber 303; a first outlet of the second condenser 301 is connected with a first inlet of the third condenser through a throttle valve 302, and a first outlet of the third condenser 30 is connected with a first inlet of the absorber 303; the outlet of the absorber 303 is connected to the inlet of the generator 40 by a third circulation pump 304;
a first working medium outlet of the secondary evaporator 20 is connected with a second inlet of the third condenser; the second outlet of the third condenser is connected with the inlet of the first-stage evaporator 10 via the first circulating pump 102. It should be noted that the terms "first", "second", "outlet" and "inlet" are used for convenience of description, and are not intended to have a special meaning or limitation.
Specifically, geothermal water with residual temperature discharged from the primary evaporator 10 is introduced into the generator 40, the binary working medium in the generator 40 is concentrated (the binary working medium is a mixed solution of two working media with different boiling points, such as a lithium bromide solution), the binary working medium is separated in the generator 40, the working medium with low boiling point is gasified and then enters the second condenser 301, and the residual binary working medium concentrated solution with high concentration is introduced into the absorber 303. And liquefying the working medium steam with low boiling point in a second condenser 301, reducing the pressure of the liquefied working medium with low boiling point through a throttle valve 302, and introducing the liquefied working medium with low boiling point into the third condenser 30, wherein the pressure in the third condenser 30 is lower than the saturation pressure of the working medium with low boiling point to evaporate and absorb heat, and cooling the first working medium subjected to heat exchange and temperature reduction with the second-stage evaporator in the first-stage ORC circulation. Then, the low boiling point working medium vapor is sent to the absorber 303, mixed with the high concentration concentrated solution in the absorber 303, and the mixed solution is pressurized by a third circulation pump 304 and then sent to the generator 40. By additionally arranging the absorption type refrigerating device, the temperature difference before and after the first working medium in the first-stage ORC circulation works is increased, the waste heat of geothermal water discharged from the first-stage evaporator can be utilized, and the power generation power of geothermal power generation and the utilization efficiency of geothermal energy are improved.
It should be noted that the three cycles are not operated in isolation, but coupled and interconnected. The secondary evaporator is not only a condenser of the primary organic Rankine cycle, but also an evaporator of the secondary organic Rankine cycle, and heat which is originally transmitted to the atmospheric environment and has exhaust steam with residual temperature in the traditional generator system is continuously used for power generation through the secondary evaporator, so that the utilization rate of medium-low temperature geothermal energy is improved, the power generation efficiency is further improved, and the power generation capacity is increased. The absorption refrigeration cycle can enable the cold energy generated by the absorption refrigeration cycle to be used for reducing the condensation temperature and the condensation pressure of the organic Rankine cycle, so that the temperature difference and the pressure difference at the two ends of the inlet and the outlet of the magnetic suspension generator are increased, the power generation power of the generator is improved, the power generation capacity is increased, and the utilization efficiency of medium-low temperature geothermal energy is improved.
To sum up, the utility model provides a well low temperature geothermol power working medium step utilizes ORC magnetic suspension power generation system, and it includes ORC generating set to and absorption formula refrigerating plant, ORC generating set includes one-level ORC generating set and second grade ORC generating set. The utility model discloses well low temperature geothermal water passes through one-level organic rankine cycle's evaporimeter and the refrigerated generator of absorption formula in proper order. The absorption refrigeration generator utilizes heat obtained from waste-temperature geothermal water discharged from the evaporator of the primary organic Rankine cycle to perform absorption refrigeration so as to improve the power generation cycle efficiency, and realizes gradient utilization of geothermal energy.
The turbine generator of the present invention is not a conventional turbine generator, but a magnetic suspension turbine generator, herein referred to as a magnetic suspension generator. The magnetic suspension generator adopts a magnetic suspension bearing, and the rotor and the bearing are not contacted with each other, so that the mechanical friction is small, the rotating speed of the generator is high, and the generating efficiency is improved.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. ORC magnetic suspension power generation system is utilized to well low temperature geothermol power working medium cascade, its characterized in that includes:
the ORC generator set comprises a first-stage ORC generator set and a second-stage ORC generator set;
the first-stage ORC generator set comprises a first circulating pump for pressurizing a first working medium, a first-stage evaporator for evaporating the first working medium, a first-stage generator connected with the first-stage evaporator, and a second-stage evaporator connected with the first-stage generator for evaporating a second working medium;
the two-stage ORC generator set comprises a second circulating pump for pressurizing a second working medium, a two-stage evaporator, a two-stage generator connected with the two-stage evaporator and a first condenser connected with the two-stage generator.
2. The medium and low temperature geothermal working medium cascade ORC magnetic suspension power generation system according to claim 1, wherein the primary ORC generator set further comprises an absorption refrigeration device for performing a second-stage cooling on the first working medium subjected to heat exchange with the secondary evaporator.
3. The medium and low temperature geothermal working medium cascade ORC magnetic levitation power generation system as claimed in claim 2, wherein the absorption refrigeration device comprises:
the generator is used for concentrating a third working medium, the second condenser is connected with the generator, the third condenser is connected with the secondary evaporator, and the absorber is connected with the third condenser;
the first outlet of the generator is connected with the first inlet of the second condenser, the first outlet of the second condenser is connected with the first inlet of the third condenser, and the first outlet of the third condenser is connected with the first inlet of the absorber;
the first outlet of the secondary evaporator is connected with the second inlet of the third condenser; a second outlet of the third condenser is connected with an inlet of the first-stage evaporator through the first circulating pump;
the first outlet of the absorber is connected with the inlet of the generator, and the second outlet of the generator is connected with the second inlet of the absorber.
4. The medium and low temperature geothermal working medium cascade ORC magnetic suspension power generation system according to any one of claims 1 to 3, wherein the primary generator and the secondary generator are both magnetic suspension turbine generators.
5. The medium and low temperature geothermal working medium cascade ORC magnetic suspension power generation system according to claim 1, wherein the boiling point of the first working medium is higher than the boiling point of the second working medium.
6. The medium and low temperature geothermal working fluid cascade ORC magnetic levitation power generation system according to claim 1, wherein the second working fluid is R123 or R124.
7. The medium and low temperature geothermal working medium cascade ORC magnetic suspension power generation system according to claim 3, wherein a throttle valve is arranged between the second condenser and the third condenser.
8. The medium and low temperature geothermal working medium cascade ORC magnetic levitation power generation system as claimed in claim 3, wherein a third circulation pump is arranged between the absorber outlet and the generator.
9. The medium and low temperature geothermal working medium cascade ORC magnetic suspension power generation system according to claim 3, wherein the third working medium is a binary working medium.
10. The medium and low temperature geothermal working medium cascade ORC magnetic suspension power generation system according to claim 9, wherein the third working medium is a lithium bromide solution.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110159377A (en) * | 2019-05-31 | 2019-08-23 | 深圳大学 | In cryogenically hot working fluid cascade utilization ORC magnetic suspension generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110159377A (en) * | 2019-05-31 | 2019-08-23 | 深圳大学 | In cryogenically hot working fluid cascade utilization ORC magnetic suspension generation system |
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Effective date of registration: 20201209 Address after: 518060 No. 3688 Nanhai Road, Shenzhen, Guangdong, Nanshan District Patentee after: SHENZHEN University Patentee after: Shenzhen Union Clean Energy Research Institute Patentee after: Jiangsu Blessing Technology Co.,Ltd. Address before: 518060 No. 3688 Nanhai Road, Shenzhen, Guangdong, Nanshan District Patentee before: SHENZHEN University Patentee before: Jiangsu Blessing Technology Co.,Ltd. |