CN119508018A - High-efficiency steam power cycle system with cascaded energy utilization - Google Patents
High-efficiency steam power cycle system with cascaded energy utilization Download PDFInfo
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- CN119508018A CN119508018A CN202411575070.XA CN202411575070A CN119508018A CN 119508018 A CN119508018 A CN 119508018A CN 202411575070 A CN202411575070 A CN 202411575070A CN 119508018 A CN119508018 A CN 119508018A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
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Abstract
本发明涉及能源与动力工程技术领域，提供一种能量梯级利用的高效蒸汽动力循环系统，包括：蒸汽循环系统和有机工质朗肯循环系统；蒸汽循环系统包括蒸汽发生器、汽轮机、凝汽器和分离装置，分离装置设有第一出口和第二出口；蒸汽发生器的出口、汽轮机、凝汽器、分离装置的进口、第一出口和蒸汽发生器的进口依次连通；有机工质朗肯循环系统包括热交换器，热交换器具有水基吸收剂进口和水基吸收剂出口；水基吸收剂出口、凝汽器的进口、分离装置的进口、第二出口和水基吸收剂进口依次连通；分离装置用于将凝汽器排出的混合液分离成水和水基吸收剂溶液；其中水经第一出口流向蒸汽发生器，水基吸收剂溶液经第二出口流向热交换器。
The present invention relates to the field of energy and power engineering technology, and provides a high-efficiency steam power cycle system for cascade utilization of energy, comprising: a steam cycle system and an organic working medium Rankine cycle system; the steam cycle system comprises a steam generator, a steam turbine, a condenser and a separation device, the separation device is provided with a first outlet and a second outlet; the outlet of the steam generator, the steam turbine, the condenser, the inlet of the separation device, the first outlet and the inlet of the steam generator are connected in sequence; the organic working medium Rankine cycle system comprises a heat exchanger, the heat exchanger has a water-based absorbent inlet and a water-based absorbent outlet; the water-based absorbent outlet, the inlet of the condenser, the inlet of the separation device, the second outlet and the water-based absorbent inlet are connected in sequence; the separation device is used to separate the mixed liquid discharged from the condenser into water and a water-based absorbent solution; wherein the water flows to the steam generator through the first outlet, and the water-based absorbent solution flows to the heat exchanger through the second outlet.
Description
Technical Field
The invention relates to the technical field of energy and power engineering, in particular to a high-efficiency steam power circulation system for energy cascade utilization.
Background
In the technical field of energy and power engineering, the steam Rankine cycle system plays a crucial role. The system provides power for industrial production or is used for generating electricity by converting heat energy into mechanical energy, and is a core component of the modern energy conversion technology. The basic working principle of the steam Rankine cycle system is that water is used as working medium, steam is heated in a boiler, the steam is discharged into a condenser to be condensed into water after being subjected to work by a steam turbine, and then the water is pumped back to the boiler to form a closed cycle.
The thermal efficiency of the steam rankine cycle system reflects the ability of the system to convert thermal energy into mechanical energy and is a key indicator for measuring the performance of the steam rankine cycle system. The existing steam Rankine cycle system has low heat efficiency, so that a large amount of energy is wasted.
Disclosure of Invention
The invention provides a high-efficiency steam power circulation system capable of realizing energy cascade utilization, which is used for solving the problem that a large amount of energy sources are wasted due to low heat efficiency of a steam Rankine circulation system in the prior art.
The invention provides an efficient steam power circulation system for energy cascade utilization, which comprises a steam circulation system and an organic working medium Rankine circulation system, wherein the steam circulation system comprises a steam generator, a steam turbine, a condenser and a separation device, the separation device is provided with a first outlet and a second outlet, the outlet of the steam generator, the steam turbine, the condenser, the inlet of the separation device, the first outlet and the inlet of the steam generator are sequentially communicated, the organic working medium Rankine circulation system comprises a heat exchanger, the heat exchanger is provided with a water-based absorbent inlet and a water-based absorbent outlet, the inlet of the condenser, the inlet of the separation device, the second outlet and the water-based absorbent inlet are sequentially communicated, the separation device is used for separating mixed liquid discharged by the condenser into water and a water-based absorbent solution, water flows to the steam generator through the first outlet, and the water-based absorbent solution flows to the heat exchanger through the second outlet.
According to the efficient steam power circulation system for energy cascade utilization, the outlet of the condenser is communicated with the water-based absorbent inlet.
According to the efficient steam power circulation system for energy cascade utilization, which is provided by the invention, the organic working medium Rankine cycle system further comprises a turbine, the heat exchanger is further provided with an organic working medium inlet and an organic working medium outlet, the turbine and the organic working medium inlet are sequentially communicated, and the turbine is used for converting heat energy into mechanical energy or electric energy.
According to the efficient steam power circulation system for energy cascade utilization, which is provided by the invention, the organic working medium Rankine circulation system further comprises a cooler, wherein the inlet of the cooler is communicated with the outlet of the turbine, and the outlet of the cooler is communicated with the inlet of the organic working medium.
According to the efficient steam power circulation system for energy cascade utilization, which is provided by the invention, the organic working medium Rankine cycle system further comprises a first pumping piece, wherein the first pumping piece is arranged between the outlet of the cooler and the organic working medium inlet.
According to the efficient steam power circulation system for energy cascade utilization, provided by the invention, the steam circulation system further comprises a second pumping piece, and the second pumping piece is arranged between the first outlet and the steam generator.
According to the efficient steam power circulation system for energy cascade utilization, provided by the invention, an adjusting piece is arranged between the outlet of the condenser and the water-based absorbent inlet or between the inlets of the separation device.
According to the efficient steam power circulation system for energy cascade utilization, which is provided by the invention, the steam power circulation system further comprises a third pumping piece, an inlet of the third pumping piece is communicated with an outlet of the condenser, and an outlet of the third pumping piece is respectively communicated with the water-based absorbent inlet and an inlet of the separation device.
According to the efficient steam power cycle system for energy cascade utilization provided by the invention, the water-based absorbent comprises a salt solution.
According to the high-efficiency steam power circulation system for energy cascade utilization, the separation device comprises a membrane distillation separation device.
According to the efficient steam power circulation system for cascade energy utilization, under the conditions that the steam pressure in the condenser is constant and the work of the steam turbine is unchanged, the water-based absorbent is input into the condenser through the water-based absorbent outlet of the heat exchanger, so that the outlet temperature of the condenser can be greatly increased, the mixed liquid at the outlet of the condenser enters the heat exchanger to exchange heat with organic working medium after being separated by the separating device, and heat energy is transferred into the organic working medium circulation system to be converted into mechanical energy or electric energy, so that the thermal efficiency of the system is improved, and the utilization rate of energy sources is improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high efficiency steam power cycle system for energy cascade utilization provided by the present invention;
Reference numerals:
100. A steam circulation system;
110. 120 parts of a steam generator, 130 parts of a steam turbine, 130 parts of a condenser, 140 parts of a separation device, 141 parts of a first outlet, 142 parts of a second outlet, 150 parts of a second pumping piece, 160 parts of a third pumping piece;
200. An organic working medium Rankine cycle system, 210, a heat exchanger, 220, a turbine, 230, a cooler, 240 and a first pumping member.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "coupled" should be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, or indirectly connected via an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.
In order to improve the thermal efficiency of the steam Rankine cycle system, the most direct way is to improve the highest temperature of the cycle system or reduce the lowest pressure in the cycle system, wherein the highest temperature in the cycle system is limited by the temperature of a heat source and the temperature resistance level of a material, and the improvement is difficult. In the circulating system, the lowest pressure is located in the condenser, and the medium discharged into the condenser by the steam turbine is saturated steam, so that the lowest pressure is associated with the lowest temperature, the medium pressure is reduced, the temperature is reduced, and the reduction of the medium temperature is limited by the temperature of an ambient cold source. Based on the above, the embodiment of the invention provides that the temperature difference between the minimum temperature of the circulation system and the ambient temperature is utilized to generate electricity under the condition that the maximum temperature and the minimum pressure of the circulation system are unchanged, so that the thermal efficiency of the circulation system is improved.
The efficient steam power cycle system of the energy cascade utilization of the present invention is described below in conjunction with fig. 1.
The efficient steam power cycle system for energy cascade utilization provided by the embodiment of the invention comprises a steam cycle system 100 and an organic working medium Rankine cycle system 200.
The steam cycle system 100 is a thermodynamic cycle system whose principle of operation is based on converting thermal energy into mechanical energy, which in turn can be used to generate electricity or provide power. The steam circulation system 100 includes a steam generator 110, a steam turbine 120, and a condenser 130, wherein an outlet of the steam generator 110 is communicated with an inlet of the steam turbine 120, an outlet of the steam turbine 120 is communicated with an inlet of the condenser 130, and an outlet of the condenser 130 is communicated with an inlet of the steam generator 110. The steam generator 110 heats water to become high-temperature and high-pressure steam, and inputs it to the steam turbine 120. The high temperature and high pressure steam enters the turbine 120 to do work through expansion and drive the turbine 120 to rotate, thereby generating instrument energy and driving a generator or other mechanical devices connected to the shaft of the turbine 120. The pressure and temperature of the steam gradually decrease as it passes through the steam turbine 120. The low pressure steam discharged from the steam turbine 120 enters the condenser 130 and is cooled by cooling water or air to form condensed water. The condensed water is returned to the steam generator 110 again to complete the cycle.
The water-based absorbent has saturated vapor pressure lower than that of pure water at the same temperature, and the water-based absorbent has higher temperature than that of pure water at the same saturated vapor pressure. In order to increase the temperature at the outlet of the condenser 130, the embodiment of the invention inputs the water-based absorbent into the condenser 130, the water-based absorbent is mixed with the low-pressure steam discharged by the steam turbine 120, and the water temperature in the condenser 130 can be greatly increased under the condition that the steam pressure in the condenser 130 is constant, so as to form the water-based absorbent solution higher than the ambient temperature. It is understood that low pressure steam is present in the condenser 130. The water-based absorbent in the embodiment of the invention can be formed by uniformly dissolving salt with a certain concentration in water, and the salt solution has absorption characteristics, namely, the saturated vapor pressure is lower than pure water at the same temperature, and the temperature is higher than the pure water at the same saturated vapor pressure. The salt may be lithium bromide or other salts having similar properties.
The organic working medium rankine cycle system 200 comprises a heat exchanger 210, the heat exchanger 210 is provided with a water-based absorbent inlet and a water-based absorbent outlet, the water-based absorbent exchanges heat with the organic working medium in the organic working medium rankine cycle system in the heat exchanger 210, and the water-based absorbent after heat exchange enters the condenser 130.
The steam cycle system 100 includes two circulation loops of steam and water-based absorbent, and in order to prevent the water-based absorbent from entering the steam loop, a separation device 140 is disposed between the condenser 130 and the steam generator 110 according to an embodiment of the present invention. The separation device 140 is used to separate the mixed liquor discharged from the condenser 130 into water and a water-based absorbent solution. Specifically, the separation device 140 has an inlet, a first outlet 141, and a second outlet 142. The water-based absorbent outlet, the inlet of the condenser 130, the inlet of the separation device 140, the second outlet 142 and the water-based absorbent inlet are sequentially communicated, the water-based absorbent exchanges heat with the organic working medium in the organic working medium Rankine cycle system in the heat exchanger 210, the water-based absorbent after heat exchange enters the condenser 130, and the water-based absorbent is mixed with low-pressure steam discharged by the steam turbine 120 to form a mixed solution of water-based absorbent solution and water with a temperature higher than the ambient temperature. The mixed liquid enters the separation device 140 for separation, water separated by the separation device 140 flows to the steam generator 110 through the first outlet 141 and enters the next circulation, and the water-based absorbent solution separated by the separation device 140 enters the heat exchanger 210 through the second outlet 142 to exchange heat with organic working medium and then enters the condenser 130 again. The water separated by the separation device 140 and the water parameters formed in the condenser 130 are unchanged. In one embodiment, separation device 140 is a membrane distillation separation device.
In the efficient steam power circulation system for cascade energy utilization provided by the embodiment of the invention, under the conditions that the steam pressure in the condenser 130 is constant and the work of the steam turbine 120 is unchanged, the water-based absorbent is input into the condenser 130 through the water-based absorbent outlet of the heat exchanger 210, so that the outlet temperature of the condenser 130 can be greatly increased, the mixed liquid at the outlet of the condenser 130 enters the heat exchanger 210 to exchange heat with an organic working medium after being separated by the separating device 140, and the heat energy is transferred into the organic working medium circulation system to be converted into mechanical energy or electric energy, thereby improving the thermal efficiency of the system and improving the utilization rate of energy.
The outlet of the condenser 130 in the present embodiment is in communication with the inlet of the separation device 140 and the water-based absorbent inlet of the heat exchanger 210, respectively. Specifically, the water-based absorbent solution formed in the condenser 130 is partially introduced into the heat exchanger 210 to exchange heat with the organic working medium, and partially introduced into the separation device 140 to be separated, wherein the water-based absorbent is introduced into the heat exchanger 210 to exchange heat with the organic working medium, and the separated water is introduced into the steam generator 110 to be circulated next time.
The embodiment of the invention reduces the separation pressure of the separation device 140 by diversion, and can adjust the medium flow in the steam circulation system. It should be noted that the water-based absorbent solution discharged from the outlet of the condenser 130 and the water-based absorbent solution separated by the separation device 140 may be mixed and then enter the heat exchanger 210 to exchange heat with the organic working medium.
In the embodiment of the present invention, the flow entering the heat exchanger 210 through the condenser 130 and the flow entering the separation device 140 are not particularly limited, and can be adjusted according to the actual working conditions. In one embodiment, an adjustment member is provided between the outlet of the condenser 130 and the water-based absorbent inlet of the heat exchanger 210 for adjusting the flow of the outlet of the condenser 130 into the heat exchanger 210. Or, an adjusting member is disposed between the outlet of the condenser 130 and the inlet of the separation device 140, for adjusting the flow rate of the outlet of the condenser 130 entering the separation device 140.
As shown in fig. 1, the organic working medium rankine cycle system 200 in the embodiment of the present invention further includes a turbine 220. The heat exchanger 210 also has an organic working fluid inlet and an organic working fluid outlet. The organic working medium outlet, the turbine 220 and the organic working medium inlet are sequentially communicated to form the organic working medium Rankine cycle system 200, and the cycle medium is the organic working medium. The water-based absorbent outlet, the inlet of the condenser 130, the inlet of the separation device 140, the second outlet 142 and the water-based absorbent inlet are sequentially communicated, and the circulating medium is water-based absorbent. The water-based absorbent enters the condenser 130 through the water-based absorbent outlet and the inlet of the condenser 130 to be mixed with water to form a water-based absorbent solution, the water-based absorbent solution is heated, enters the heat exchanger 210 through the outlet of the condenser 130 or the second outlet 142 of the separation device 140, and exchanges heat with an organic working medium to be converted into high-temperature high-pressure steam. The high-temperature high-pressure steam enters the turbine 220 to expand and do work, so that the heat energy carried by the high-temperature high-pressure organic working medium is converted into mechanical energy or electric energy, the temperature difference is effectively utilized, and the thermal efficiency of the system is improved. The organic working medium after the work is done by the turbine 220 is converted into low temperature and low pressure gas to enter the next cycle. The water-based absorbent after heat exchange with the organic working fluid enters the condenser 130 again to enter the next cycle. The number of turbines 220 in an embodiment of the present invention may be plural, and the plural turbines 220 form a turbine group.
Further, the organic working medium rankine cycle system 200 further includes a cooler 230, an inlet of the cooler 230 is communicated with an outlet of the turbine 220, an outlet of the cooler 230 is communicated with an organic working medium inlet of the heat exchanger 210, the cooler 230 is used for cooling the organic working medium exiting from the turbine 220 to form a low-temperature low-pressure organic working medium, and the low-pressure organic working medium enters the heat exchanger 210 through the organic working medium inlet to exchange heat with the water-based absorbent and then undergoes the next cycle. The cooler 230 includes an air cooler, a water cooler, and the like.
According to the invention, the water-based absorbent is input into the condenser 130 through the heat exchanger 210, the water-based absorbent is mixed with low-pressure steam discharged by the steam turbine 120 in the condenser 130, the water temperature in the condenser 130 is increased, a water-based absorbent solution higher than the ambient temperature is formed, an energy step is formed, and the heat is transferred into the organic working medium Rankine cycle system 200 through the separation device 140 or directly through the heat exchanger 210 and is converted into mechanical energy or electric energy, so that the thermal efficiency of the system is improved.
The organic working medium rankine cycle system 200 of the embodiment of the present invention further includes a first pumping member 240, where the first pumping member 240 is disposed between the outlet of the cooler 230 and the organic working medium inlet of the heat exchanger 210, so as to increase the flow rate of the fluid, reduce the thermal resistance of the fluid, and make the liquid organic working medium at the outlet of the cooler 230 enter the heat exchanger 210 rapidly, thereby improving the heat exchange efficiency of the heat exchanger 210. The first pumping member 240 may be an organic working fluid pump.
The steam cycle system 100 according to the embodiment of the present invention further includes a second pumping member 150, wherein the second pumping member 150 is disposed between the first outlet 141 and the steam generator 110, so that water separated by the separation device 140 is rapidly introduced into the steam generator 110, thereby ensuring continuous flow of water and efficient performance of a cycle process, and also helping to reduce pressure loss and heat loss of the system, thereby improving efficiency of the entire system. The second pumping member 150 may be a feed pump.
The steam cycle system 100 further includes a third pumping member 160, an inlet of the third pumping member 160 is in communication with an outlet of the condenser 130, and an outlet of the third pumping member 160 is in communication with the water-based absorbent inlet of the heat exchanger 210 and the inlet of the separation device 140, respectively. The third pumping member 160 rapidly distributes the low-temperature fluid (the mixed liquid of water and the water-based absorbent) at the outlet of the condenser 130 to the heat exchanger 210 for heat exchange or enters the separation device 140 for separation, thereby improving the recovery efficiency of heat energy and also ensuring the stable operation of the system and the maximum utilization of heat energy. The third pumping member 160 may be a condensate pump.
The embodiment of the invention adopts a water-based absorbent instead of pure water as a medium of the steam power circulation system, the water-based absorbent can be formed by uniformly dissolving salt with a certain concentration in water, and the salt solution has absorption characteristics, namely, the saturated steam pressure is lower than that of the pure water at the same temperature, and the temperature is higher than that of the pure water at the same saturated steam pressure. The condenser 130 adopts a mixed direct condensation structure, strong brine is sprayed into the condenser 130, the strong brine is directly contacted with steam discharged by the steam turbine 120 for condensation, the weak brine is formed, a part of the weak brine discharged by the condenser 130 is pressurized and then is subjected to membrane distillation separation device to generate strong brine and pure water, wherein the pure water enters the steam generator 110 to generate high-temperature steam, then enters the steam turbine 120 for expansion work, the strong brine is mixed with the other part of the weak brine discharged by the condenser 130 to form strong brine, the strong brine is sprayed into the condenser 130 after being cooled by the heat exchanger 210, and meanwhile, heat is transferred to an organic working medium of the organic Rankine cycle system by the heat exchanger 210 for power generation.
Under the conditions that the steam pressure in the condenser 130 is constant and the work of the steam turbine 120 is unchanged, the water temperature in the condenser 130 can be greatly increased, the energy of the high-temperature water is subjected to cascade utilization through the organic working fluid Rankine cycle system 200, and the total thermal efficiency of the steam power cycle system is increased. According to the embodiment of the invention, the mature steam Rankine cycle system and the organic working medium Rankine cycle system 200 are fully utilized, only a small amount of modification is needed to implement based on the existing power station steam Rankine cycle system, the devices such as the steam turbine 120, the steam generator 110, the second pumping piece 150 and the like do not need to be changed, the devices such as the condenser 130, the third pumping piece 160 and the like only need to replace a water-based absorbent (such as a salt solution) with water for a medium to replace a component-level material, and the novel organic working medium Rankine cycle system 200 and the novel membrane distillation separation device are added.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.
Claims (10)
1. The efficient steam power circulation system for energy cascade utilization is characterized by comprising a steam circulation system and an organic working medium Rankine circulation system;
The steam circulation system comprises a steam generator, a steam turbine, a condenser and a separation device, wherein the separation device is provided with a first outlet and a second outlet, and the outlet of the steam generator, the steam turbine, the condenser, the inlet of the separation device, the first outlet and the inlet of the steam generator are sequentially communicated;
The organic working medium Rankine cycle system comprises a heat exchanger, wherein the heat exchanger is provided with a water-based absorbent inlet and a water-based absorbent outlet, and the water-based absorbent outlet, the inlet of the condenser, the inlet of the separation device, the second outlet and the water-based absorbent inlet are sequentially communicated;
the separation device is used for separating the mixed liquid discharged from the condenser into water and a water-based absorbent solution, wherein the water flows to the steam generator through the first outlet, and the water-based absorbent solution flows to the heat exchanger through the second outlet.
2. The energy cascade efficient vapor power cycle system of claim 1, wherein an outlet of the condenser is in communication with the water-based absorbent inlet.
3. The efficient steam power cycle system for energy cascade utilization as recited in claim 2, wherein the organic working medium rankine cycle system further comprises a turbine, the heat exchanger further comprises an organic working medium inlet and an organic working medium outlet, the turbine and the organic working medium inlet are sequentially communicated, and the turbine is used for converting thermal energy into mechanical energy or electrical energy.
4. The energy cascade efficient steam power cycle system of claim 3, wherein the organic working fluid rankine cycle system further comprises a cooler, an inlet of the cooler being in communication with an outlet of the turbine, an outlet of the cooler being in communication with the organic working fluid inlet.
5. The energy cascade efficient steam power cycle system of claim 4, further comprising a first pumping element disposed between the outlet of the cooler and the organic working fluid inlet.
6. The energy cascade efficient steam power cycle system of claim 1, further comprising a second pumping member disposed between the first outlet and the steam generator.
7. The efficient steam power cycle system of energy cascade utilization of claim 1, wherein an adjustment member is provided between the outlet of the condenser and the water-based absorbent inlet or between the inlet of the separation device.
8. The energy cascade efficient steam power cycle system of claim 1, further comprising a third pumping element, an inlet of the third pumping element in communication with an outlet of the condenser, an outlet of the third pumping element in communication with the water-based absorbent inlet and the separator inlet, respectively.
9. The energy cascade efficient vapor power cycle system of claim 1, wherein the water-based absorbent comprises a salt solution.
10. The energy cascade efficient steam power cycle system of claim 1 wherein the separation device comprises a membrane distillation separation device.
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| EP0328103A1 (en) * | 1988-02-12 | 1989-08-16 | Babcock-Hitachi Kabushiki Kaisha | Hybrid rankine cycle system |
| JP2004092507A (en) * | 2002-08-30 | 2004-03-25 | Mitsubishi Heavy Ind Ltd | Steam turbine plant |
| CN101539039A (en) * | 2008-03-17 | 2009-09-23 | 苏庆泉 | Power cycle system and power cycle method |
| US20160125965A1 (en) * | 2014-10-29 | 2016-05-05 | Hitachi-Ge Nuclear Energy, Ltd. | Power Plant |
| US20210215069A1 (en) * | 2018-05-23 | 2021-07-15 | Bart GIOS | Closed-cycle absorption system and method for cooling and generating power |
| RU2787622C1 (en) * | 2022-07-21 | 2023-01-11 | федеральное государственное бюджетное образовательное учреждение высшего образования "Южно-Российский государственный политехнический университет (НПИ) имени М.И. Платова" | Thermal power plant with a regeneration system and method of its operation |
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