WO2020239068A1 - Cascaded power generation system combining magnetic levitation-based orc power generators for utilizing medium/low temperature geothermal energy - Google Patents

Cascaded power generation system combining magnetic levitation-based orc power generators for utilizing medium/low temperature geothermal energy Download PDF

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WO2020239068A1
WO2020239068A1 PCT/CN2020/093234 CN2020093234W WO2020239068A1 WO 2020239068 A1 WO2020239068 A1 WO 2020239068A1 CN 2020093234 W CN2020093234 W CN 2020093234W WO 2020239068 A1 WO2020239068 A1 WO 2020239068A1
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condenser
stage
generator
orc
power generation
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PCT/CN2020/093234
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French (fr)
Chinese (zh)
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谢和平
马举昌
周韬
廖家禧
李存宝
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深圳大学
江苏赐福科技有限公司
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Publication of WO2020239068A1 publication Critical patent/WO2020239068A1/en

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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
    • 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
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • 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
    • F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
    • F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
    • F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • 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
    • Y02E10/10—Geothermal energy

Definitions

  • the invention relates to the technical field of geothermal energy power generation, in particular to a mid-low temperature geothermal ORC magnetic levitation composite cascade power generation system.
  • geothermal energy As a clean and huge resource, is expected to become one of the clean energy sources that will replace traditional fossil energy in the future.
  • my country is rich in geothermal resources, with 2334 hot springs exposed and 5818 geothermal mining wells.
  • the amount of hydrothermal geothermal resources is equivalent to 1.250 billion tons of standard coal, and the annual mining capacity is equivalent to 1.865 billion tons of standard coal; the annual mining capacity of shallow geothermal energy resources in 336 cities above the prefecture level is equivalent to 700 million tons of standard coal;
  • the amount of prospective resources is equivalent to 856 trillion tons of standard coal.
  • my country’s geothermal resources are unevenly distributed.
  • a small number of high-temperature geotropics are mainly distributed in plateau areas such as Georgia and Yunnan, while the medium and low temperature hydrothermal energy resources, which account for more than 95%, are mainly distributed in northern China, Songliao, and northern Jiangsu. , Jianghan, Ordos, Sichuan and other plains (basins) as well as the southeast coastal areas. Therefore, the current status of my country's geothermal resources determines that my country's geothermal development is mainly based on medium and low temperature geothermal power generation, supplemented by high temperature geothermal power generation. However, the low power generation efficiency (less than 10%) and low power generation of the current medium and low temperature geothermal resources seriously restrict the promotion of the use of medium and low temperature geothermal resources for power generation.
  • the purpose of the present invention is to provide a medium- and low-temperature geothermal ORC magnetic levitation composite cascade power generation system, which aims to solve the problem of low efficiency of the existing medium and low-temperature geothermal power generation.
  • Medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system including:
  • ORC generator set including the first level ORC generator set and the second level ORC generator set
  • the first-stage ORC generator set includes a first-stage evaporator for evaporating a first working fluid, a first-stage generator connected with the first-stage evaporator, and a second-stage generator connected with the first-stage generator A secondary evaporator of the working fluid, a first condenser connected to the secondary evaporator, and a first working fluid pump connected to the first condenser and the primary evaporator respectively;
  • the two-stage ORC generator set includes, the two-stage evaporator, a two-stage generator connected to the two-stage evaporator, and a second condenser connected to the two-stage generator, respectively connected to the second The second working fluid pump connected to the condenser and the secondary evaporator;
  • Absorption refrigeration device including generator for concentration of third working fluid, third condenser, first throttle valve, second throttle valve, first condenser, second condenser, solution pump, liquid return pump And absorber;
  • the first outlet of the generator is connected with the first inlet of the third condenser, and the first outlet of the third condenser passes through the first throttle valve and the second throttle valve to connect with the first condenser and the second Two condenser connections;
  • the second outlet of the first condenser is connected with the first inlet of the absorber; the first outlet of the second condenser is connected with the second inlet of the absorber;
  • the working medium outlet of the absorber is connected with the inlet of the generator, and the second outlet of the generator is connected with the third inlet of the absorber.
  • the first-stage ORC generator set further includes a first cooling mechanism respectively connected with the first-stage generator and the second-stage evaporator.
  • the two-stage ORC generator set further includes a second cooling mechanism respectively connected with the two-stage generator and a second condenser.
  • the first condenser and/or the second condenser include a condenser coil and a sprayer for cooling the condenser coil.
  • a throttle valve is provided between the third condenser and the first condenser and the second condenser.
  • the third working fluid is a binary working fluid.
  • the first-stage generator and the second-stage generator are both magnetic levitation turbine generators.
  • the boiling point of the first working fluid is higher than the boiling point of the second working fluid.
  • the first cooling mechanism includes a first two-stage turbine and an impeller connected to the first two-stage turbine.
  • the second cooling mechanism includes a second two-stage turbine and an impeller connected to the second two-stage turbine.
  • the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by the present invention combines three working cycles of residual pressure cascade utilization, working fluid cascade utilization, and geothermal heat source cascade utilization. Effectively improve the heat utilization efficiency, improve the geothermal power generation efficiency and total power generation.
  • Fig. 1 is a block diagram of the first medium-low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by an embodiment of the present invention.
  • Fig. 2 is a block diagram of a second medium-low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by an embodiment of the present invention.
  • Figure 3 is a block diagram of a third medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by an embodiment of the present invention.
  • Fig. 4 is a block diagram of a fourth medium-low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by an embodiment of the present invention.
  • the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system disclosed by the present invention includes an ORC generator set for power generation and an absorption refrigeration device.
  • the ORC generator set includes two groups, namely, one-stage ORC generator set and A two-stage ORC generator set, wherein the first-stage ORC generator set includes a first-stage evaporator 10, a first-stage generator 101 connected to the first-stage evaporator 10, and a second-stage evaporator connected to the first-stage generator 101
  • the first-stage generator 101 is a magnetic levitation turbine generator.
  • the first condenser 102 is connected to the two-stage evaporator 20 and the one-stage evaporator 10 respectively.
  • the power generation process of the first-stage ORC generator set involves a first-stage organic Rankine cycle, that is, the medium and low-temperature geothermal water passes through the first-stage evaporator 10, so that the first working fluid passing through the first-stage evaporator absorbs heat and evaporates.
  • the high-temperature and high-pressure steam is formed.
  • the high-temperature and high-pressure steam enters the first-stage maglev turbine generator 101 to expand and do work to drive the first-stage maglev generator to generate electricity.
  • the first working fluid will continue to release heat through the first condenser 102 to further reduce the condensing temperature of the working fluid, and return to the first-stage evaporator 10 through the first working fluid pump 105.
  • the two-stage ORC generator set includes a second-stage evaporator 20 for evaporating a second working fluid, a second-stage generator 201 connected to the second-stage evaporator 20, and a second-stage generator 201 connected to the second-stage generator 201
  • the second condenser 202 is a second working fluid pump 205 connected to the second condenser 202 and the second evaporator 20 respectively; the second generator 201 is a magnetic levitation turbine generator.
  • the second organic Rankine cycle that is, the second organic working medium absorbs the heat energy in the exhaust steam discharged from the outlet of the primary magnetic levitation generator 101 in the second evaporator 20 and evaporates into the second organic working medium
  • the steam, and then the second organic working fluid steam with higher temperature and pressure enters the secondary magnetic levitation generator 201 to expand and do work to drive the secondary magnetic levitation generator to generate electricity.
  • the exhaust steam at the outlet of the secondary magnetic levitation generator 201 enters the second condenser 202 After condensation, the liquid second organic working fluid is finally condensed and returned to the secondary evaporator 20 through the second working fluid pump 205.
  • the absorption refrigeration device includes: a generator 30 for concentrating a third working fluid, a third condenser 301, a first throttle valve 303, a second throttle valve 304, a first condenser 102, and a second condenser 202 and absorber 302; the generator 30 contains a third working fluid, and the third working fluid is a binary mixed working fluid.
  • the first outlet of the generator 30 is connected to the first inlet of the third condenser 301, and the first outlet of the third condenser 301 is connected to the first throttle valve 303 and the second throttle valve 304 respectively.
  • a condenser 102 and a second condenser 202 are connected;
  • the second outlet of the first condenser 102 is connected to the first inlet of the absorber 302; the second outlet of the second condenser 202 is connected to the second inlet of the absorber 302;
  • the working fluid outlet of the absorber 302 is connected to the inlet of the generator 30, and the second outlet of the generator 30 is connected to the third inlet of the absorber 302.
  • first outlet “first inlet”, “second outlet”, “second inlet”, and “third inlet” are only for convenience of expression, and are not intended to be limiting. Has no special meaning.
  • the absorption refrigeration device is involved in an absorption refrigeration cycle in its work, that is, the third working fluid contains two components with different boiling points as a refrigerant solution, and the low-boiling working fluid is absorbed from the generator 30
  • the heat discharged from the first-stage evaporator 10 with relatively high residual temperature is evaporated and then absorbed by natural cooling water in the third condenser to be liquefied.
  • the liquefied working fluid (low boiling point) flows out through the first outlet
  • the third condenser is divided into the first condenser 102 and the second condenser 202 after passing through the first throttle valve 303 and the second throttle valve 304 and the pressure is reduced.
  • the liquid working fluid is atomized and sprayed to the first condenser tube 104 in the first condenser 102 and the second condenser tube 204 in the second condenser 202 to continuously evaporate and cool, thereby Reduce the condensation temperature of the first working fluid and the second working fluid respectively.
  • the steam at the outlet of the first condenser and the second condenser enters the generator 30 through the first inlet and the second inlet of the absorber respectively.
  • the remaining high-concentration concentrated solution of the third working fluid enters the absorber 302 through the third inlet, (the steam and the high-concentration solution enter the absorber at the same time), the steam is absorbed by the high-concentration solution, and the diluted solution is returned through the liquid return pump 305 Generator 30.
  • the concentrated solution of the third working medium with high concentration is pumped into the absorber through the solution pump 306.
  • the first-stage ORC generator set further includes a first cooling mechanism connected to the first-stage generator and the second-stage evaporator, respectively.
  • the first cooling mechanism includes a first two-stage turbine and an impeller connected to the first two-stage turbine.
  • the geothermal water passes through the first-stage evaporator 10, so that the first working fluid passing through the first-stage evaporator 10 absorbs heat and evaporates to form high-temperature and high-pressure steam.
  • the high-temperature and high-pressure steam enters the first-stage magnetic levitation turbine generator 101.
  • the first-stage magnetic levitation turbine generator 101 has two-stage turbines, in which the gaseous working medium performs work in the first-stage turbine, and the first-stage magnetic levitation turbine generator is driven to generate electricity through a coupling.
  • the expansion work of the first stage turbine drives the impeller to rotate through the coupling, forcing the surrounding air to accelerate the flow, and strengthen the heat exchange of the condenser tube in the first condenser 102.
  • the exhaust steam from the outlet of the first stage magnetic levitation generator then enters the second stage evaporator 20 for heat exchange and cooling. It also provides heat for the two-stage organic Rankine cycle. After cooling, the first-stage working fluid continues to release heat through the first condenser 102 to further reduce the condensation temperature of the working fluid, and finally returns to the first-stage evaporator 10 through the first working fluid pump 105.
  • the two-stage ORC generator set further includes a second cooling mechanism respectively connected to the two-stage generator and a second condenser.
  • the second cooling mechanism includes a second two-stage turbine and an impeller connected to the second two-stage turbine.
  • the second organic working fluid absorbs the heat energy in the exhaust steam discharged from the outlet of the primary magnetic levitation generator 101 in the secondary evaporator 20 and evaporates into the second organic working fluid vapor, and then the steam with higher temperature and pressure
  • the second organic working fluid steam enters the secondary magnetic levitation generator 201.
  • the secondary magnetic levitation turbine generator 201 has a two-stage turbine.
  • the gaseous working fluid performs work in the primary turbine, and the secondary magnetic levitation transmission is driven by the coupling.
  • Flat generator generates power.
  • the gaseous working fluid after power generation enters the second two-stage turbine to expand and do work.
  • the impeller is driven to rotate through the coupling, forcing the surrounding air to flow faster, strengthening the heat exchange of the condenser tube in the second condenser 202, and second-stage magnetic levitation power generation
  • the exhaust steam at the outlet of the engine 201 enters the second condenser 202 to be condensed, and the liquid second organic working fluid is finally returned to the secondary evaporator 20 through the second working fluid pump 205 after the condensation.
  • first cooling mechanism and the second cooling mechanism may be respectively arranged in the first-stage ORC generator set and the second-stage ORC generator set at the same time. That is, the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system may include the first cooling mechanism and the second cooling mechanism at the same time, as shown in FIG. 4.
  • the two-stage evaporator is not only the condenser of the first-stage organic Rankine cycle, but also the evaporator of the second-stage organic Rankine cycle.
  • the traditional generator system is transferred to the atmosphere.
  • the heat of the waste steam will continue to be used for power generation to increase the utilization rate of medium and low temperature geothermal energy, thereby improving power generation efficiency and increasing power generation.
  • the first condenser and the second condenser in the absorption refrigeration cycle are respectively arranged with a first condenser tube and a second condenser tube to realize the connection between the absorption refrigeration and the power generation cycle, which can make the cold generated by the absorption refrigeration cycle
  • the amount is used to reduce the condensation temperature and condensation pressure of the organic Rankine cycle, thereby increasing the pressure difference between the inlet and outlet of the maglev generator, increasing the power generation of the generator, thereby increasing the power generation and improving the utilization efficiency of medium and low temperature geothermal energy.
  • the present invention provides a medium and low temperature geothermal ORC maglev composite cascade power generation system.
  • the medium and low temperature geothermal ORC maglev composite cascade power generation system includes an ORC generator set and an absorption refrigeration device.
  • the ORC generator set Including the first level ORC generator set and the second level ORC generator set.
  • the medium and low temperature geothermal water sequentially passes through the evaporator of the first-stage organic Rankine cycle and the generator of absorption refrigeration.
  • the absorption refrigeration generator uses the heat obtained from the hot water with residual temperature discharged from the evaporator of the first-stage organic Rankine cycle for absorption refrigeration to improve the efficiency of the power generation cycle and realize the cascade utilization of geothermal energy.
  • the turbo generator in the present invention is not a traditional steam turbine generator, but a magnetic levitation steam turbine generator, which is referred to as a magnetic levitation generator in this text.
  • the magnetic levitation generator uses magnetic levitation bearings, and the rotor and the bearing do not contact each other, so the mechanical friction is small and the generator speed is high, thereby improving the power generation efficiency.
  • the steam turbine part of the magnetic levitation generator of the present invention has two-stage turbines, and the gaseous working medium is expanded to perform work respectively in the two-stage turbines.
  • the first-stage turbine drives the generator through a coupling to generate electricity;
  • the second-stage turbine uses a coupling Drive the impeller to rotate, accelerate the air flow on the surface of the condenser tube, strengthen the heat exchange capacity of the condenser tube, reduce the condensation temperature and condensing pressure, thereby increasing the pressure difference between the inlet and outlet of the maglev generator, increasing the power generation efficiency of the maglev generator, thereby increasing power generation And improve the utilization efficiency of medium and low temperature geothermal energy.

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Abstract

A cascaded power generation system combining magnetic levitation-based ORC power generators for utilizing medium/low temperature geothermal energy comprises a primary ORC power generator assembly and a secondary ORC power generator assembly. The primary ORC power generator assembly comprises a primary evaporator (10) used to evaporate a first working substance, a primary power generator (101) connected to the primary evaporator (10), a secondary evaporator (20) connected to the primary power generator (101) and used to evaporate a second working substance, and a first condenser (102) respectively connected to the secondary evaporator (20) and the primary evaporator (10). The secondary ORC power generator assembly comprises a secondary evaporator (20), a secondary power generator (201) connected to the secondary evaporator (20), and a secondary condenser (202) respectively connected to the secondary evaporator (20) and the secondary power generator (201). The system further comprises a generator (30) used to concentrate a third working substance, a third condenser (301), and an absorber (302).

Description

中低温地热ORC磁悬浮复合梯级发电系统Medium and low temperature geothermal ORC magnetic suspension composite cascade power generation system 技术领域Technical field
本发明涉及地热能发电技术领域，尤其涉及中低温地热ORC磁悬浮复合梯级发电系统。The invention relates to the technical field of geothermal energy power generation, in particular to a mid-low temperature geothermal ORC magnetic levitation composite cascade power generation system.
背景技术Background technique
随着化石能源的枯竭，可再生能源方兴未艾，地热能作为一种清洁、储量巨大的资源有望成为未来取代传统化石能源的清洁能源之一。我国地热资源量较为丰富，出露温泉2334处，地热开采井5818眼。水热型地热资源量折合标准煤12500亿吨，每年可开采量折合标准煤18.65亿吨；全国336个地级以上城市浅层地热能资源每年可开采量折合标准煤7亿吨；干热岩远景资源量折合标准煤856万亿吨。但是我国地热资源地理分布不均，少量的高温地热带主要分布在西藏、云南等高原地区，而占比达95％以上的中低温水热型地热能资源主要分布在华北、松辽、苏北、江汉、鄂尔多斯、四川等平原(盆地)以及东南沿海等地区。因此，我国地热资源的赋存现状决定了我国地热开发主要以中低温地热发电为主，高温地热发电为辅。然而，目前中低温地热资源发电效率低下(不足10％)、发电量小，严重制约着中低温地热资源发电利用的推广。With the depletion of fossil energy, renewable energy is in the ascendant. Geothermal energy, as a clean and huge resource, is expected to become one of the clean energy sources that will replace traditional fossil energy in the future. my country is rich in geothermal resources, with 2334 hot springs exposed and 5818 geothermal mining wells. The amount of hydrothermal geothermal resources is equivalent to 1.250 billion tons of standard coal, and the annual mining capacity is equivalent to 1.865 billion tons of standard coal; the annual mining capacity of shallow geothermal energy resources in 336 cities above the prefecture level is equivalent to 700 million tons of standard coal; The amount of prospective resources is equivalent to 856 trillion tons of standard coal. However, my country’s geothermal resources are unevenly distributed. A small number of high-temperature geotropics are mainly distributed in plateau areas such as Tibet and Yunnan, while the medium and low temperature hydrothermal energy resources, which account for more than 95%, are mainly distributed in northern China, Songliao, and northern Jiangsu. , Jianghan, Ordos, Sichuan and other plains (basins) as well as the southeast coastal areas. Therefore, the current status of my country's geothermal resources determines that my country's geothermal development is mainly based on medium and low temperature geothermal power generation, supplemented by high temperature geothermal power generation. However, the low power generation efficiency (less than 10%) and low power generation of the current medium and low temperature geothermal resources seriously restrict the promotion of the use of medium and low temperature geothermal resources for power generation.
因此，现有技术还有待于改进和发展。Therefore, the existing technology needs to be improved and developed.
发明内容Summary of the invention
鉴于上述现有技术的不足，本发明的目的在于提供中低温地热ORC磁悬浮复合梯级发电系统，旨在解决现有利用中低温地热发电效率低下的问题。In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a medium- and low-temperature geothermal ORC magnetic levitation composite cascade power generation system, which aims to solve the problem of low efficiency of the existing medium and low-temperature geothermal power generation.
本发明为解决上述技术问题所采用的技术方案如下：The technical solutions adopted by the present invention to solve the above technical problems are as follows:
中低温地热ORC磁悬浮复合梯级发电系统，其中，包括：Medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, including:
ORC发电机组，包括一级ORC发电机组以及二级ORC发电机组；ORC generator set, including the first level ORC generator set and the second level ORC generator set;
所述一级ORC发电机组包括，用于蒸发第一工质的一级蒸发器，与所述一级蒸发器连接的一级发电机，与所述一级发电机连接的用于蒸发第二工质的二级蒸发器，与所述二级蒸发器连接的第一冷凝器，分别与所述第一冷凝器和一级蒸发器连接的第一工质泵；The first-stage ORC generator set includes a first-stage evaporator for evaporating a first working fluid, a first-stage generator connected with the first-stage evaporator, and a second-stage generator connected with the first-stage generator A secondary evaporator of the working fluid, a first condenser connected to the secondary evaporator, and a first working fluid pump connected to the first condenser and the primary evaporator respectively;
所述二级ORC发电机组包括，所述二级蒸发器，与所述二级蒸发器连接的二级发电机，与所述二级发电机连接的第二冷凝器，分别与所述第二冷凝器和二级蒸发器连接的第二工质泵；The two-stage ORC generator set includes, the two-stage evaporator, a two-stage generator connected to the two-stage evaporator, and a second condenser connected to the two-stage generator, respectively connected to the second The second working fluid pump connected to the condenser and the secondary evaporator;
吸收式制冷装置，包括用于第三工质浓缩的发生器，第三冷凝器，第一节流阀，第二节 流阀，第一冷凝器，第二冷凝器，溶液泵，回液泵以及吸收器；Absorption refrigeration device, including generator for concentration of third working fluid, third condenser, first throttle valve, second throttle valve, first condenser, second condenser, solution pump, liquid return pump And absorber;
所述发生器第一出口与所述第三冷凝器第一入口连接，所述第三冷凝器第一出口分别经过第一节流阀和第二节流阀与所述第一冷凝器以及第二冷凝器连接；The first outlet of the generator is connected with the first inlet of the third condenser, and the first outlet of the third condenser passes through the first throttle valve and the second throttle valve to connect with the first condenser and the second Two condenser connections;
所述第一冷凝器第二出口与所述吸收器第一入口连接；所述第二冷凝器第一出口与所述吸收器第二入口连接；The second outlet of the first condenser is connected with the first inlet of the absorber; the first outlet of the second condenser is connected with the second inlet of the absorber;
所述吸收器工质出口与所述发生器入口连接，所述发生器第二出口与所述吸收器第三入口连接。The working medium outlet of the absorber is connected with the inlet of the generator, and the second outlet of the generator is connected with the third inlet of the absorber.
所述的中低温地热ORC磁悬浮复合梯级发电系统，其中，所述一级ORC发电机组还包括分别与所述一级发电机以及二级蒸发器连接的第一降温机构。In the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, the first-stage ORC generator set further includes a first cooling mechanism respectively connected with the first-stage generator and the second-stage evaporator.
所述的中低温地热ORC磁悬浮复合梯级发电系统，其中，所述二级ORC发电机组还包括分别与所述二级发电机以及第二冷凝器连接的第二降温机构。In the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, the two-stage ORC generator set further includes a second cooling mechanism respectively connected with the two-stage generator and a second condenser.
所述的中低温地热ORC磁悬浮复合梯级发电系统，其中，所述第一冷凝器和/或第二冷凝器包括冷凝盘管以及用于为所述冷凝盘管降温的喷淋器。In the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, the first condenser and/or the second condenser include a condenser coil and a sprayer for cooling the condenser coil.
所述的中低温地热ORC磁悬浮复合梯级发电系统，其中，所述第三冷凝器与所述第一冷凝器以及所述第二冷凝器之间均设置有节流阀。In the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, a throttle valve is provided between the third condenser and the first condenser and the second condenser.
所述的中低温地热ORC磁悬浮复合梯级发电系统，其中，所述第三工质为二元工质。In the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, the third working fluid is a binary working fluid.
所述的中低温地热ORC磁悬浮复合梯级发电系统，其中，所述一级发电机以及所述二级发电机均为磁悬浮透平发电机。In the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, the first-stage generator and the second-stage generator are both magnetic levitation turbine generators.
所述的中低温地热ORC磁悬浮复合梯级发电系统，其中，所述第一工质的沸点高于所述第二工质的沸点。In the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, the boiling point of the first working fluid is higher than the boiling point of the second working fluid.
所述的中低温地热ORC磁悬浮复合梯级发电系统，其中，所述第一降温机构包括第一二级涡轮，与所述第一二级涡轮连接的叶轮。In the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system, the first cooling mechanism includes a first two-stage turbine and an impeller connected to the first two-stage turbine.
所述的中低温地热ORC磁悬浮复合梯级发电方法，其中，所述第二降温机构包括第二二级涡轮，与所述第二二级涡轮连接的叶轮。In the medium-low temperature geothermal ORC magnetic levitation composite cascade power generation method, the second cooling mechanism includes a second two-stage turbine and an impeller connected to the second two-stage turbine.
有益效果：本发明所提供的中低温地热ORC磁悬浮复合梯级发电系统，通过结合余压梯级利用、工质梯级利用以及地热热源梯级利用，这三个工作循环。有效提高了热量利用效率，提升了地热发电效率和发电总量。Beneficial effects: The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by the present invention combines three working cycles of residual pressure cascade utilization, working fluid cascade utilization, and geothermal heat source cascade utilization. Effectively improve the heat utilization efficiency, improve the geothermal power generation efficiency and total power generation.
附图说明Description of the drawings
图1是本发明实施实例提供的第一种中低温地热ORC磁悬浮复合梯级发电系统框图。Fig. 1 is a block diagram of the first medium-low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by an embodiment of the present invention.
图2是本发明实施实例提供的第二种中低温地热ORC磁悬浮复合梯级发电系统框图。Fig. 2 is a block diagram of a second medium-low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by an embodiment of the present invention.
图3是本发明实施实例提供的第三种中低温地热ORC磁悬浮复合梯级发电系统框图。Figure 3 is a block diagram of a third medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by an embodiment of the present invention.
图4是本发明实施实例提供的第四种中低温地热ORC磁悬浮复合梯级发电系统框图。Fig. 4 is a block diagram of a fourth medium-low temperature geothermal ORC magnetic levitation composite cascade power generation system provided by an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案及优点更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。In order to make the objectives, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention.
如图1所示，本发明公开的中低温地热ORC磁悬浮复合梯级发电系统，其包括用于发电的ORC发电机组以及吸收式制冷装置，所述ORC发电机组包括两组即一级ORC发电机组和二级ORC发电机组，其中所述一级ORC发电机组包括一级蒸发器10、与所述一级蒸发器10连接的一级发电机101、与所述一级发电机101连接的二级蒸发器20，所述一级发电机101为磁悬浮透平发电机。分别与所述二级蒸发器20以及所述一级蒸发器10连接的第一冷凝器102。As shown in Figure 1, the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system disclosed by the present invention includes an ORC generator set for power generation and an absorption refrigeration device. The ORC generator set includes two groups, namely, one-stage ORC generator set and A two-stage ORC generator set, wherein the first-stage ORC generator set includes a first-stage evaporator 10, a first-stage generator 101 connected to the first-stage evaporator 10, and a second-stage evaporator connected to the first-stage generator 101 The first-stage generator 101 is a magnetic levitation turbine generator. The first condenser 102 is connected to the two-stage evaporator 20 and the one-stage evaporator 10 respectively.
具体来说，所述一级ORC发电机组发电过程涉及一级有机朗肯循环，即中低温地热水经过一级蒸发器10，使经过一级蒸发器的第一工质吸收热量后蒸发，形成高温高压蒸汽，高温高压蒸汽进入一级磁悬浮透平发电机101中膨胀做功驱动一级磁悬浮发电机发电，一级磁悬浮发电机出口乏汽随后进入二级蒸发器20冷却并为二级有机朗肯循环提供热量，冷却后第一工质经第一冷凝器102继续放热进一步降低工质的冷凝温度，通过第一工质泵105，回到一级蒸发器10。Specifically, the power generation process of the first-stage ORC generator set involves a first-stage organic Rankine cycle, that is, the medium and low-temperature geothermal water passes through the first-stage evaporator 10, so that the first working fluid passing through the first-stage evaporator absorbs heat and evaporates. The high-temperature and high-pressure steam is formed. The high-temperature and high-pressure steam enters the first-stage maglev turbine generator 101 to expand and do work to drive the first-stage maglev generator to generate electricity. After cooling, the first working fluid will continue to release heat through the first condenser 102 to further reduce the condensing temperature of the working fluid, and return to the first-stage evaporator 10 through the first working fluid pump 105.
所述二级ORC发电机组包括，用于蒸发第二工质的二级蒸发器20，与所述二级蒸发器20连接的二级发电机201，与所述二级发电机201连接的第二冷凝器202，分别与所述第二冷凝器202和二级蒸发20器连接的第二工质泵205；所述二级发电机201为磁悬浮透平发电机。The two-stage ORC generator set includes a second-stage evaporator 20 for evaporating a second working fluid, a second-stage generator 201 connected to the second-stage evaporator 20, and a second-stage generator 201 connected to the second-stage generator 201 The second condenser 202 is a second working fluid pump 205 connected to the second condenser 202 and the second evaporator 20 respectively; the second generator 201 is a magnetic levitation turbine generator.
具体来说，所述二级有机朗肯循环，即第二有机工质在所述二级蒸发器20中吸收从一级磁悬浮发电机101出口排出乏汽中的热能蒸发为第二有机工质蒸汽，随后具有较高温度和压力的第二有机工质蒸汽进入二级磁悬浮发电机201中膨胀做功驱动二级磁悬浮发电机发电，二级磁悬浮发电机201出口乏汽进入第二冷凝器202中冷凝，最终冷凝后液态第二有机工质，通过第二工质泵205回到所述二级蒸发器20中。通过增设二级ORC发电机组，使一级ORC发电机组中发电后的蒸汽再次利用，提高了热量的利用效率。Specifically, the second organic Rankine cycle, that is, the second organic working medium absorbs the heat energy in the exhaust steam discharged from the outlet of the primary magnetic levitation generator 101 in the second evaporator 20 and evaporates into the second organic working medium The steam, and then the second organic working fluid steam with higher temperature and pressure enters the secondary magnetic levitation generator 201 to expand and do work to drive the secondary magnetic levitation generator to generate electricity. The exhaust steam at the outlet of the secondary magnetic levitation generator 201 enters the second condenser 202 After condensation, the liquid second organic working fluid is finally condensed and returned to the secondary evaporator 20 through the second working fluid pump 205. By adding a two-stage ORC generator set, the steam generated in the first-stage ORC generator set can be reused and the heat utilization efficiency is improved.
所述吸收式制冷装置包括：用于第三工质浓缩的发生器30，第三冷凝器301，第一节流阀303，第二节流阀304，第一冷凝器102，第二冷凝器202以及吸收器302；所述发生器30中盛放的是第三工质，所述第三工质为二元混合工质。The absorption refrigeration device includes: a generator 30 for concentrating a third working fluid, a third condenser 301, a first throttle valve 303, a second throttle valve 304, a first condenser 102, and a second condenser 202 and absorber 302; the generator 30 contains a third working fluid, and the third working fluid is a binary mixed working fluid.
所述发生器30第一出口与所述第三冷凝器301第一入口连接，所述第三冷凝器301第一出口分别经过第一节流阀303和第二节流阀304与所述第一冷凝器102以及第二冷凝器202连接；The first outlet of the generator 30 is connected to the first inlet of the third condenser 301, and the first outlet of the third condenser 301 is connected to the first throttle valve 303 and the second throttle valve 304 respectively. A condenser 102 and a second condenser 202 are connected;
所述第一冷凝器102第二出口与所述吸收器302第一入口连接；所述第二冷凝器202第二出口与所述吸收器302第二入口连接；The second outlet of the first condenser 102 is connected to the first inlet of the absorber 302; the second outlet of the second condenser 202 is connected to the second inlet of the absorber 302;
所述吸收器302工质出口与所述发生器30入口连接，所述发生器30第二出口与所述吸收器302第三入口连接。The working fluid outlet of the absorber 302 is connected to the inlet of the generator 30, and the second outlet of the generator 30 is connected to the third inlet of the absorber 302.
需要说明的是，上述所述的“第一出口”、“第一入口”、“第二出口”、“第二入口”、“第三入口”只是为了表述的方便，并不用于限定，也不具有特殊含义。It should be noted that the above-mentioned “first outlet”, “first inlet”, “second outlet”, “second inlet”, and “third inlet” are only for convenience of expression, and are not intended to be limiting. Has no special meaning.
具体来说，所述吸收式制冷装置在工作中涉及吸收式制冷循环，即所述第三工质作为制冷溶液包含两种沸点不同的组分，其中低沸点工质在发生器30中吸收从一级蒸发器10中排放出具有较高余温地热水的热量蒸发后在第三冷凝器中被天然冷却水吸热而液化，液化后的工质液(低沸点)经第一出口流出所述第三冷凝器，经过第一节流阀303与第二节流阀304分流并降压后分别进入第一冷凝器102与第二冷凝器202，在第一喷淋泵103与第二喷淋泵203的驱动下液态工质雾化后分别喷向设置在第一冷凝器102中的第一冷凝管104和设置在第二冷凝器202中的第二冷凝管204持续蒸发制冷，从而分别降低第一工质和第二工质的冷凝温度，第一冷凝器与第二冷凝器出口的蒸汽分别经所述吸收器第一入口、第二入口进入所述发生器30，发生器30剩余的高浓度第三工质的浓溶液经第三入口进入吸收器302，(蒸汽以及高浓度溶液为同时进入吸收器)蒸汽被高浓度溶液吸收，稀释后的溶液通过回液泵305回到发生器30。其中，高浓度第三工质的浓溶液通过溶液泵306，泵入吸收器。通过将吸附式制冷得到的冷量用于进一步降低ORC发电机组的工质温度，提升了中低温地热热量的综合利用率。Specifically, the absorption refrigeration device is involved in an absorption refrigeration cycle in its work, that is, the third working fluid contains two components with different boiling points as a refrigerant solution, and the low-boiling working fluid is absorbed from the generator 30 The heat discharged from the first-stage evaporator 10 with relatively high residual temperature is evaporated and then absorbed by natural cooling water in the third condenser to be liquefied. The liquefied working fluid (low boiling point) flows out through the first outlet The third condenser is divided into the first condenser 102 and the second condenser 202 after passing through the first throttle valve 303 and the second throttle valve 304 and the pressure is reduced. Driven by the spray pump 203, the liquid working fluid is atomized and sprayed to the first condenser tube 104 in the first condenser 102 and the second condenser tube 204 in the second condenser 202 to continuously evaporate and cool, thereby Reduce the condensation temperature of the first working fluid and the second working fluid respectively. The steam at the outlet of the first condenser and the second condenser enters the generator 30 through the first inlet and the second inlet of the absorber respectively. The remaining high-concentration concentrated solution of the third working fluid enters the absorber 302 through the third inlet, (the steam and the high-concentration solution enter the absorber at the same time), the steam is absorbed by the high-concentration solution, and the diluted solution is returned through the liquid return pump 305 Generator 30. Among them, the concentrated solution of the third working medium with high concentration is pumped into the absorber through the solution pump 306. By using the cold energy obtained by adsorption refrigeration to further reduce the working fluid temperature of the ORC generator set, the comprehensive utilization rate of the medium and low temperature geothermal heat is improved.
请参阅图2，在一些实施方式中，所述一级ORC发电机组还包括分别与所述一级发电机以及二级蒸发器连接的第一降温机构。所述第一降温机构包括第一二级涡轮，与所述第一二级涡轮连接的叶轮。Referring to Fig. 2, in some embodiments, the first-stage ORC generator set further includes a first cooling mechanism connected to the first-stage generator and the second-stage evaporator, respectively. The first cooling mechanism includes a first two-stage turbine and an impeller connected to the first two-stage turbine.
具体来说，地热水经过一级蒸发器10，使经过一级蒸发器10的第一工质吸收热量后蒸发，形成高温高压蒸汽，高温高压蒸汽进入一级磁悬浮透平发电机101中，所述一级磁悬浮 透平发电机101具有两级涡轮，其中气态工质在一级涡轮中做功，通过联轴器驱动一级磁悬浮透平发电机发电，发电后的气态工质进入第一二级涡轮膨胀做功通过联轴器驱动叶轮旋转，迫使周围空气加速流动，强化第一冷凝器102中的冷凝管的换热，一级磁悬浮发电机出口乏汽随后进入二级蒸发器20换热冷却并为二级有机朗肯循环提供热量，冷却后一级工质经第一冷凝器102继续放热进一步降低工质的冷凝温度，最后经过第一工质泵105回到一级蒸发器10。Specifically, the geothermal water passes through the first-stage evaporator 10, so that the first working fluid passing through the first-stage evaporator 10 absorbs heat and evaporates to form high-temperature and high-pressure steam. The high-temperature and high-pressure steam enters the first-stage magnetic levitation turbine generator 101. The first-stage magnetic levitation turbine generator 101 has two-stage turbines, in which the gaseous working medium performs work in the first-stage turbine, and the first-stage magnetic levitation turbine generator is driven to generate electricity through a coupling. The expansion work of the first stage turbine drives the impeller to rotate through the coupling, forcing the surrounding air to accelerate the flow, and strengthen the heat exchange of the condenser tube in the first condenser 102. The exhaust steam from the outlet of the first stage magnetic levitation generator then enters the second stage evaporator 20 for heat exchange and cooling. It also provides heat for the two-stage organic Rankine cycle. After cooling, the first-stage working fluid continues to release heat through the first condenser 102 to further reduce the condensation temperature of the working fluid, and finally returns to the first-stage evaporator 10 through the first working fluid pump 105.
请参阅图3，在一些实施方式中，所述二级ORC发电机组还包括分别与所述二级发电机以及第二冷凝器连接的第二降温机构。所述第二降温机构包括，第二二级涡轮，与所述第二二级涡轮连接的叶轮。Referring to FIG. 3, in some embodiments, the two-stage ORC generator set further includes a second cooling mechanism respectively connected to the two-stage generator and a second condenser. The second cooling mechanism includes a second two-stage turbine and an impeller connected to the second two-stage turbine.
具体来说，第二有机工质在所述二级蒸发器20中吸收从一级磁悬浮发电机101出口排出乏汽中的热能蒸发为第二有机工质蒸汽，随后具有较高温度和压力的第二有机工质蒸汽进入二级磁悬浮发电机201中，所述二级磁悬浮透平发电机201具有两级涡轮，其中气态工质在一级涡轮中做功，通过联轴器驱动二级磁悬浮透平发电机发电，发电后的气态工质进入第二二级涡轮膨胀做功通过联轴器驱动叶轮旋转，迫使周围空气加速流动，强化第二冷凝器202中冷凝管的换热，二级磁悬浮发电机201出口乏汽进入第二冷凝器202中冷凝，最终冷凝后液态第二有机工质经第二工质泵205回到所述二级蒸发器20中。通过增设二级ORC发电机组，使一级ORC发电机组中发电后的蒸汽再次利用，提高了热量的利用效率。Specifically, the second organic working fluid absorbs the heat energy in the exhaust steam discharged from the outlet of the primary magnetic levitation generator 101 in the secondary evaporator 20 and evaporates into the second organic working fluid vapor, and then the steam with higher temperature and pressure The second organic working fluid steam enters the secondary magnetic levitation generator 201. The secondary magnetic levitation turbine generator 201 has a two-stage turbine. The gaseous working fluid performs work in the primary turbine, and the secondary magnetic levitation transmission is driven by the coupling. Flat generator generates power. The gaseous working fluid after power generation enters the second two-stage turbine to expand and do work. The impeller is driven to rotate through the coupling, forcing the surrounding air to flow faster, strengthening the heat exchange of the condenser tube in the second condenser 202, and second-stage magnetic levitation power generation The exhaust steam at the outlet of the engine 201 enters the second condenser 202 to be condensed, and the liquid second organic working fluid is finally returned to the secondary evaporator 20 through the second working fluid pump 205 after the condensation. By adding a two-stage ORC generator set, the steam generated in the first-stage ORC generator set can be reused, which improves the efficiency of heat utilization.
进一步的，第一降温机构和所述第二降温机构可同时分别设置在所述一级ORC发电机组和所述二级ORC发电机组中。即所述中低温地热ORC磁悬浮复合梯级发电系统中，可同时包括所述第一降温机构和第二降温机构，如图4所示。Further, the first cooling mechanism and the second cooling mechanism may be respectively arranged in the first-stage ORC generator set and the second-stage ORC generator set at the same time. That is, the medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system may include the first cooling mechanism and the second cooling mechanism at the same time, as shown in FIG. 4.
需要说明的是上述三个循环之间并非孤立运行，而是相互耦合、相互联系。所述二级蒸发器不仅是一级有机朗肯循环的冷凝器，同时也是二级有机朗肯循环的蒸发器，通过二级蒸发器将传统发电机系统中本该传递到大气环境中的具有余温乏汽的热量继续用于发电，提高中低温地热能的利用率，进而提高发电效率，增加发电量。吸收式制冷循环中的第一冷凝器和第二冷凝器内部分别布置有第一冷凝管和第二冷凝管，实现吸收式制冷与发电循环之间的联系，可以使吸收式制冷循环产生的冷量用于降低有机朗肯循环的冷凝温度和冷凝压力，从而增大磁悬浮发电机进出口两端的压差，提高发电机的发电功率，进而增加发电量以及提高中低温地热能的利用效率。It should be noted that the above three cycles do not operate in isolation, but are coupled and interconnected with each other. The two-stage evaporator is not only the condenser of the first-stage organic Rankine cycle, but also the evaporator of the second-stage organic Rankine cycle. Through the second-stage evaporator, the traditional generator system is transferred to the atmosphere. The heat of the waste steam will continue to be used for power generation to increase the utilization rate of medium and low temperature geothermal energy, thereby improving power generation efficiency and increasing power generation. The first condenser and the second condenser in the absorption refrigeration cycle are respectively arranged with a first condenser tube and a second condenser tube to realize the connection between the absorption refrigeration and the power generation cycle, which can make the cold generated by the absorption refrigeration cycle The amount is used to reduce the condensation temperature and condensation pressure of the organic Rankine cycle, thereby increasing the pressure difference between the inlet and outlet of the maglev generator, increasing the power generation of the generator, thereby increasing the power generation and improving the utilization efficiency of medium and low temperature geothermal energy.
综上所述，本发明提供了一种中低温地热ORC磁悬浮复合梯级发电系统，所述中低温地热ORC磁悬浮复合梯级发电系统，其包括ORC发电机组，以及吸收式制冷装置，所述ORC 发电机组包括一级ORC发电机组和二级ORC发电机组。本发明中中低温地热水依次经过一级有机朗肯循环的蒸发器和吸收式制冷的发生器。其中吸收式制冷发生器中利用从一级有机朗肯循环的蒸发器排放的具有余温地热水中获得的热量用于吸收式制冷来提升发电循环效率，实现了地热能的梯级利用。In summary, the present invention provides a medium and low temperature geothermal ORC maglev composite cascade power generation system. The medium and low temperature geothermal ORC maglev composite cascade power generation system includes an ORC generator set and an absorption refrigeration device. The ORC generator set Including the first level ORC generator set and the second level ORC generator set. In the present invention, the medium and low temperature geothermal water sequentially passes through the evaporator of the first-stage organic Rankine cycle and the generator of absorption refrigeration. Among them, the absorption refrigeration generator uses the heat obtained from the hot water with residual temperature discharged from the evaporator of the first-stage organic Rankine cycle for absorption refrigeration to improve the efficiency of the power generation cycle and realize the cascade utilization of geothermal energy.
本发明中的透平发电机并非传统的汽轮发电机，而是磁悬浮汽轮发电机，在本文中简称磁悬浮发电机。磁悬浮发电机采用的是磁悬浮轴承，转子与轴承之间不相互接触，因此机械摩擦小，发电机的转速高，从而提高发电效率。本发明中的磁悬浮发电机的汽轮机部分具有两级涡轮，气态工质在两级涡轮中分别进行一次膨胀做功，其中，一级涡轮通过联轴器驱动发电机发电；二级涡轮通过联轴器驱动叶轮旋转，加速冷凝管表面的空气流动，强化冷凝管换热能力，降低冷凝温度和冷凝压力，从而增大磁悬浮发电机进出口两端的压差，提高磁悬浮发电机的发电效率，进而增加发电量以及提高中低温地热能的利用效率。The turbo generator in the present invention is not a traditional steam turbine generator, but a magnetic levitation steam turbine generator, which is referred to as a magnetic levitation generator in this text. The magnetic levitation generator uses magnetic levitation bearings, and the rotor and the bearing do not contact each other, so the mechanical friction is small and the generator speed is high, thereby improving the power generation efficiency. The steam turbine part of the magnetic levitation generator of the present invention has two-stage turbines, and the gaseous working medium is expanded to perform work respectively in the two-stage turbines. Among them, the first-stage turbine drives the generator through a coupling to generate electricity; the second-stage turbine uses a coupling Drive the impeller to rotate, accelerate the air flow on the surface of the condenser tube, strengthen the heat exchange capacity of the condenser tube, reduce the condensation temperature and condensing pressure, thereby increasing the pressure difference between the inlet and outlet of the maglev generator, increasing the power generation efficiency of the maglev generator, thereby increasing power generation And improve the utilization efficiency of medium and low temperature geothermal energy.
应当理解的是，本发明的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本发明所附权利要求的保护范围。It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or changes can be made based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present invention.

Claims (10)

  1. 中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，包括：The medium and low temperature geothermal ORC magnetic suspension composite cascade power generation system is characterized in that it includes:
    ORC发电机组，包括一级ORC发电机组以及二级ORC发电机组；ORC generator set, including the first level ORC generator set and the second level ORC generator set;
    所述一级ORC发电机组包括，用于蒸发第一工质的一级蒸发器，与所述一级蒸发器连接的一级发电机，与所述一级发电机连接的用于蒸发第二工质的二级蒸发器，与所述二级蒸发器连接的第一冷凝器，分别与所述第一冷凝器以及所述一级蒸发器连接的第一工质泵；The first-stage ORC generator set includes a first-stage evaporator for evaporating a first working fluid, a first-stage generator connected with the first-stage evaporator, and a second-stage generator connected with the first-stage generator A secondary evaporator of the working fluid, a first condenser connected to the secondary evaporator, a first working fluid pump connected to the first condenser and the primary evaporator respectively;
    所述二级ORC发电机组包括，用于蒸发第二工质的二级蒸发器，与所述二级蒸发器连接的二级发电机，与所述二级发电机连接的第二冷凝器，分别与所述第二冷凝器和所述二级蒸发器连接的第二工质泵；The two-stage ORC generator set includes a two-stage evaporator for evaporating a second working fluid, a two-stage generator connected with the two-stage evaporator, and a second condenser connected with the two-stage generator, A second working fluid pump connected to the second condenser and the secondary evaporator respectively;
    吸收式制冷装置，包括用于第三工质浓缩的发生器，第三冷凝器，第一节流阀，第二节流阀，第一冷凝器，第二冷凝器，溶液泵，回液泵以及吸收器；Absorption refrigeration device, including generator for concentration of third working fluid, third condenser, first throttle valve, second throttle valve, first condenser, second condenser, solution pump, liquid return pump And absorber;
    所述发生器第一出口与所述第三冷凝器第一入口连接，所述第三冷凝器第一出口分别通过所述第一节流阀和所述第二节流阀与所述第一冷凝器以及第二冷凝器连接；The first outlet of the generator is connected to the first inlet of the third condenser, and the first outlet of the third condenser is connected to the first outlet through the first throttle valve and the second throttle valve respectively. The condenser and the second condenser are connected;
    所述第一冷凝器第二出口与所述吸收器第一入口连接；所述第二冷凝器第二工质出口与所述吸收器第二入口连接；The second outlet of the first condenser is connected with the first inlet of the absorber; the second working fluid outlet of the second condenser is connected with the second inlet of the absorber;
    所述吸收器工质出口与所述发生器入口连接，所述发生器第二出口与所述吸收器第三入口连接。The working medium outlet of the absorber is connected with the inlet of the generator, and the second outlet of the generator is connected with the third inlet of the absorber.
  2. 根据权利要求1所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述一级ORC发电机组还包括分别与所述一级发电机以及二级蒸发器连接的第一降温机构。The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system according to claim 1, wherein the first-stage ORC generator set further comprises a first cooling mechanism connected to the first-stage generator and the second-stage evaporator, respectively.
  3. 根据权利要求1或2所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述二级ORC发电机组还包括分别与所述二级发电机以及第二冷凝器连接的第二降温机构。The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system according to claim 1 or 2, wherein the two-stage ORC generator set further comprises a second cooling system connected to the two-stage generator and a second condenser respectively. mechanism.
  4. 根据权利要求1所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述第一冷凝器和/或第二冷凝器包括冷凝盘管以及用于为所述冷凝盘管降温的喷淋器。The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system according to claim 1, wherein the first condenser and/or the second condenser includes a condensing coil and a spray for cooling the condensing coil. Shower.
  5. 根据权利要求1所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述第三冷凝器与所述第一冷凝器以及所述第二冷凝器之间均设置有节流阀。The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system according to claim 1, wherein a throttle valve is provided between the third condenser and the first condenser and the second condenser.
  6. 根据权利要求1所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述第三工质为二元工质。The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system according to claim 1, wherein the third working fluid is a binary working fluid.
  7. 根据权利要求1所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述一级发电机以及所述二级发电机均为磁悬浮透平发电机。The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system according to claim 1, wherein the first-stage generator and the second-stage generator are both magnetic levitation turbine generators.
  8. 根据权利要求1所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述第一工质的沸点高于所述第二工质的沸点。The medium and low temperature geothermal ORC magnetic suspension composite cascade power generation system according to claim 1, wherein the boiling point of the first working fluid is higher than the boiling point of the second working fluid.
  9. 根据权利要求2所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述第一降温机构包括第一二级涡轮，与所述第一二级涡轮连接的叶轮。The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system according to claim 2, wherein the first cooling mechanism comprises a first secondary turbine and an impeller connected to the first secondary turbine.
  10. 根据权利要求3所述的中低温地热ORC磁悬浮复合梯级发电系统，其特征在于，所述第二降温机构包括第二二级涡轮，与所述第二二级涡轮连接的叶轮。The medium and low temperature geothermal ORC magnetic levitation composite cascade power generation system according to claim 3, wherein the second cooling mechanism includes a second secondary turbine and an impeller connected to the second secondary turbine.
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11187212B1 (en) 2021-04-02 2021-11-30 Ice Thermal Harvesting, Llc Methods for generating geothermal power in an organic Rankine cycle operation during hydrocarbon production based on working fluid temperature
US11293414B1 (en) 2021-04-02 2022-04-05 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power in an organic rankine cycle operation
US11326550B1 (en) 2021-04-02 2022-05-10 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11421663B1 (en) 2021-04-02 2022-08-23 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power in an organic Rankine cycle operation
US11480074B1 (en) 2021-04-02 2022-10-25 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11486370B2 (en) 2021-04-02 2022-11-01 Ice Thermal Harvesting, Llc Modular mobile heat generation unit for generation of geothermal power in organic Rankine cycle operations
US11493029B2 (en) 2021-04-02 2022-11-08 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11592009B2 (en) 2021-04-02 2023-02-28 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11644015B2 (en) 2021-04-02 2023-05-09 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110131115B (en) * 2019-05-31 2024-06-18 深圳大学 Medium-low temperature geothermal ORC magnetic suspension composite step power generation system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101216020A (en) * 2007-12-28 2008-07-09 天津大学 Multilevel solar energy middle and low temperature Rankine cycle system
CN102562496A (en) * 2012-01-17 2012-07-11 天津大学 Middle/low-temperature geothermic efficient thermoelectric coupling combined supply system based on organic Rankine cycle (ORC)
CN102834590A (en) * 2010-03-25 2012-12-19 科斯坦佐·佩里科 Plant for the production of energy based upon the organic rankine cycle
CN105736263A (en) * 2016-04-01 2016-07-06 上海开山能源装备有限公司 Geothermal well opening power station system and power generation method thereof
DE102016112601A1 (en) * 2016-07-08 2018-01-11 INTEC GMK GmbH Device for power generation according to the ORC principle, geothermal system with such a device and operating method
CN110131115A (en) * 2019-05-31 2019-08-16 深圳大学 The compound cascaded power generating system of middle low temperature underground heat ORC magnetic suspension

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1869293B1 (en) * 2005-03-29 2013-05-08 UTC Power Corporation Cascaded organic rankine cycles for waste heat utilization
JP4866151B2 (en) * 2006-05-31 2012-02-01 大阪瓦斯株式会社 Power system
US20110265501A1 (en) * 2010-04-29 2011-11-03 Ari Nir System and a method of energy recovery from low temperature sources of heat
CN202381129U (en) * 2011-11-01 2012-08-15 北京科技大学 Power supplying system
CN103061835B (en) * 2012-12-28 2015-06-17 东南大学 Overlapped organic rankine cycle efficient heat machine
CN105135722A (en) * 2015-08-21 2015-12-09 天津大学 Energy supply device and method for power generation, refrigeration and heating of buildings through medium-and-low temperature geothermal water
CN207348919U (en) * 2017-08-29 2018-05-11 广州番禺速能冷暖设备有限公司 A kind of magnetic suspension afterheat generating system
CN210033736U (en) * 2019-05-31 2020-02-07 深圳大学 Medium-low temperature terrestrial heat ORC magnetic suspension composite step power generation system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101216020A (en) * 2007-12-28 2008-07-09 天津大学 Multilevel solar energy middle and low temperature Rankine cycle system
CN102834590A (en) * 2010-03-25 2012-12-19 科斯坦佐·佩里科 Plant for the production of energy based upon the organic rankine cycle
CN102562496A (en) * 2012-01-17 2012-07-11 天津大学 Middle/low-temperature geothermic efficient thermoelectric coupling combined supply system based on organic Rankine cycle (ORC)
CN105736263A (en) * 2016-04-01 2016-07-06 上海开山能源装备有限公司 Geothermal well opening power station system and power generation method thereof
DE102016112601A1 (en) * 2016-07-08 2018-01-11 INTEC GMK GmbH Device for power generation according to the ORC principle, geothermal system with such a device and operating method
CN110131115A (en) * 2019-05-31 2019-08-16 深圳大学 The compound cascaded power generating system of middle low temperature underground heat ORC magnetic suspension

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11187212B1 (en) 2021-04-02 2021-11-30 Ice Thermal Harvesting, Llc Methods for generating geothermal power in an organic Rankine cycle operation during hydrocarbon production based on working fluid temperature
US11236735B1 (en) 2021-04-02 2022-02-01 Ice Thermal Harvesting, Llc Methods for generating geothermal power in an organic Rankine cycle operation during hydrocarbon production based on wellhead fluid temperature
US11255315B1 (en) 2021-04-02 2022-02-22 Ice Thermal Harvesting, Llc Controller for controlling generation of geothermal power in an organic Rankine cycle operation during hydrocarbon production
US11274663B1 (en) 2021-04-02 2022-03-15 Ice Thermal Harvesting, Llc Controller for controlling generation of geothermal power in an organic rankine cycle operation during hydrocarbon production
US11280322B1 (en) 2021-04-02 2022-03-22 Ice Thermal Harvesting, Llc Systems for generating geothermal power in an organic Rankine cycle operation during hydrocarbon production based on wellhead fluid temperature
US11293414B1 (en) 2021-04-02 2022-04-05 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power in an organic rankine cycle operation
US11326550B1 (en) 2021-04-02 2022-05-10 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11359612B1 (en) 2021-04-02 2022-06-14 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power in an organic rankine cycle operation
US11359576B1 (en) 2021-04-02 2022-06-14 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11421663B1 (en) 2021-04-02 2022-08-23 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power in an organic Rankine cycle operation
US11421625B1 (en) 2021-04-02 2022-08-23 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11480074B1 (en) 2021-04-02 2022-10-25 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11486370B2 (en) 2021-04-02 2022-11-01 Ice Thermal Harvesting, Llc Modular mobile heat generation unit for generation of geothermal power in organic Rankine cycle operations
US11486330B2 (en) 2021-04-02 2022-11-01 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11493029B2 (en) 2021-04-02 2022-11-08 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11542888B2 (en) 2021-04-02 2023-01-03 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11549402B2 (en) 2021-04-02 2023-01-10 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11572849B1 (en) 2021-04-02 2023-02-07 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11578706B2 (en) 2021-04-02 2023-02-14 Ice Thermal Harvesting, Llc Systems for generating geothermal power in an organic Rankine cycle operation during hydrocarbon production based on wellhead fluid temperature
US11592009B2 (en) 2021-04-02 2023-02-28 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11598320B2 (en) 2021-04-02 2023-03-07 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11624355B2 (en) 2021-04-02 2023-04-11 Ice Thermal Harvesting, Llc Modular mobile heat generation unit for generation of geothermal power in organic Rankine cycle operations
US11644015B2 (en) 2021-04-02 2023-05-09 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11644014B2 (en) 2021-04-02 2023-05-09 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power in an organic Rankine cycle operation
US11668209B2 (en) 2021-04-02 2023-06-06 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11680541B2 (en) 2021-04-02 2023-06-20 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11732697B2 (en) 2021-04-02 2023-08-22 Ice Thermal Harvesting, Llc Systems for generating geothermal power in an organic Rankine cycle operation during hydrocarbon production based on wellhead fluid temperature
US11761433B2 (en) 2021-04-02 2023-09-19 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power in an organic Rankine cycle operation
US11761353B2 (en) 2021-04-02 2023-09-19 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11773805B2 (en) 2021-04-02 2023-10-03 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11879409B2 (en) 2021-04-02 2024-01-23 Ice Thermal Harvesting, Llc Systems and methods utilizing gas temperature as a power source
US11905934B2 (en) 2021-04-02 2024-02-20 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11933279B2 (en) 2021-04-02 2024-03-19 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11933280B2 (en) 2021-04-02 2024-03-19 Ice Thermal Harvesting, Llc Modular mobile heat generation unit for generation of geothermal power in organic Rankine cycle operations
US11946459B2 (en) 2021-04-02 2024-04-02 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power at a drilling rig
US11959466B2 (en) 2021-04-02 2024-04-16 Ice Thermal Harvesting, Llc Systems and methods for generation of electrical power in an organic Rankine cycle operation
US11971019B2 (en) 2021-04-02 2024-04-30 Ice Thermal Harvesting, Llc Systems for generating geothermal power in an organic Rankine cycle operation during hydrocarbon production based on wellhead fluid temperature

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