阅读说明：本技术 一种有机朗肯循环地热发电供热系统 (Organic Rankine cycle geothermal power generation and heat supply system ) 是由 王钊 王震甲 夏永强 严少刚 杜振华 于 2020-10-15 设计创作，主要内容包括：本发明涉及一种有机朗肯循环地热发电供热系统,包括地热流体管路系统、工质回路系统、循环水回路系统；所述地热流体管路系统包括开采井、潜水泵、蒸发器、工质预热器、循环水预热器、回灌井,通过地热流体管道依次连接；所述工质回路系统包括工质蒸发器、透平发电机组、冷凝器、工质泵、工质预热器,通过工质管道依次连接,形成闭合回路；所述循环水回路系统包括冷凝器、热用户换热器、循环水泵、循环水预热器,通过循环水管道依次连接,形成闭合回路。所述地热流体管路系统与所述工质回路系统通过所述工质预热器、所述蒸发器耦合连接；所述工质回路系统与所述循环水回路系统通过所述冷凝器耦合连接；所述地热流体管路系统与所述循环水回路系统通过所述循环水预热器耦合连接。本发明实现了能源的梯级利用,能同时满足发电与供热需求,提高能源利用率和经济效益。(The invention relates to an organic Rankine cycle geothermal power generation and heat supply system which comprises a geothermal fluid pipeline system, a working medium loop system and a circulating water loop system, wherein the working medium loop system is connected with the geothermal fluid pipeline system; the geothermal fluid pipeline system comprises a production well, a submersible pump, an evaporator, a working medium preheater, a circulating water preheater and a recharging well which are sequentially connected through a geothermal fluid pipeline; the working medium loop system comprises a working medium evaporator, a turbine generator set, a condenser, a working medium pump and a working medium preheater which are sequentially connected through a working medium pipeline to form a closed loop; the circulating water loop system comprises a condenser, a heat user heat exchanger, a circulating water pump and a circulating water preheater, which are sequentially connected through a circulating water pipeline to form a closed loop. The geothermal fluid pipeline system is coupled with the working medium loop system through the working medium preheater and the evaporator; the working medium loop system is coupled with the circulating water loop system through the condenser; the geothermal fluid pipeline system is coupled with the circulating water loop system through the circulating water preheater. The invention realizes the cascade utilization of energy, can simultaneously meet the requirements of power generation and heat supply, and improves the energy utilization rate and economic benefit.)

1. An organic Rankine cycle geothermal power generation and heat supply system comprises a geothermal fluid pipeline system, a working medium loop system and a circulating water loop system; the geothermal fluid pipeline system comprises a production well, a submersible pump, an evaporator, a working medium preheater, a circulating water preheater and a recharging well which are sequentially connected through a geothermal fluid pipeline; the working medium loop system comprises a working medium evaporator, a turbine generator set, a condenser, a working medium pump and a working medium preheater which are sequentially connected through a working medium pipeline to form a closed loop; the circulating water loop system comprises the condenser, a heat user heat exchanger, a circulating water pump and a circulating water preheater which are sequentially connected through a circulating water pipeline to form a closed loop; the geothermal fluid pipeline system is coupled with the working medium loop system through the working medium preheater and the evaporator; the working medium loop system is coupled with the circulating water loop system through the condenser; the geothermal fluid pipeline system is coupled with the circulating water loop system through the circulating water preheater.

2. The organic Rankine cycle geothermal power generation and supply system according to claim 1, wherein in the working medium loop system, a working medium outlet of the working medium evaporator is connected with a working medium inlet of the turbine generator set through an organic working medium pipeline, a working medium outlet of the turbine generator set is connected with a working medium inlet of the condenser through an organic working medium pipeline, a working medium outlet of the condenser is connected with an inlet of the working medium pump through an organic working medium pipeline, an outlet of the working medium pump is connected with a working medium inlet of the working medium preheater through an organic working medium pipeline, and a working medium outlet of the working medium preheater is connected with the working medium inlet of the working medium evaporator through an organic working medium pipeline; in the circulating water loop system, a circulating water outlet of the condenser is connected with a circulating water inlet of the heat user heat exchanger through a hot water supply pipeline, a circulating water outlet of the heat user heat exchanger is connected with an inlet of the circulating water pump through a hot water supply pipeline, an outlet of the circulating water pump is connected with a circulating water inlet of the circulating water preheater through a hot water supply pipeline, and a circulating water outlet of the circulating water preheater is connected with a circulating water inlet of the condenser through a hot water supply pipeline.

Technical Field

The invention relates to the technical field of geothermal power generation, in particular to an organic Rankine cycle geothermal power generation and heat supply system.

Background

Reducing energy consumption and improving the comprehensive utilization rate of energy sources become fundamental ways for solving the problems of energy shortage and environmental pollution worldwide. The low-temperature waste heat resources below 300 ℃ account for about 30% of the total waste heat resources, the utilization rate is low, most of the low-temperature waste heat can be directly discharged into the atmosphere, and the energy waste and the heat pollution to the environment are caused. The efficient utilization of low-temperature waste heat, geothermal resources, solar energy, biomass energy, ocean heat and the like is an important content of energy conservation and emission reduction exploration in the field of development and utilization of new energy. In the practice of utilizing waste heat of low-temperature heat energy at home and abroad, an organic Rankine cycle system is the most common thermodynamic cycle power generation system.

The existing organic Rankine cycle geothermal power generation system condenser usually adopts a cooling tower to discharge the residual heat to the environment; the temperature of the reinjection water is higher, and the heat utilization rate is lower. In order to improve the heat utilization rate, the system disclosed by the invention reasonably combines organic Rankine cycle and geothermal utilization, realizes gradient utilization of energy, meets the requirements of power generation and heat supply, reduces the temperature of geothermal return water and improves the heat utilization rate.

Disclosure of Invention

The invention aims to provide an organic Rankine cycle geothermal power generation and heat supply system which can generate power, provide hot water and efficiently utilize geothermal resources.

In order to achieve the purpose, the invention provides the following technical scheme: an organic Rankine cycle geothermal power generation and heat supply system comprises a geothermal fluid pipeline system, a working medium loop system and a circulating water loop system; the geothermal fluid pipeline system comprises a production well, a submersible pump, an evaporator, a working medium preheater, a circulating water preheater and a recharging well which are sequentially connected through a geothermal fluid pipeline; the working medium loop system comprises a working medium evaporator, a turbine generator set, a condenser, a working medium pump and a working medium preheater which are sequentially connected through a working medium pipeline to form a closed loop; the circulating water loop system comprises the condenser, a heat user heat exchanger, a circulating water pump and a circulating water preheater which are sequentially connected through a circulating water pipeline to form a closed loop; the geothermal fluid pipeline system is coupled with the working medium loop system through the working medium preheater and the evaporator; the working medium loop system is coupled with the circulating water loop system through the condenser; the geothermal fluid pipeline system is coupled with the circulating water loop system through the circulating water preheater.

In the working medium loop system, a working medium outlet of the working medium evaporator is connected with a working medium inlet of the turbine generator set through an organic working medium pipeline, a working medium outlet of the turbine generator set is connected with a working medium inlet of the condenser through an organic working medium pipeline, a working medium outlet of the condenser is connected with an inlet of the working medium pump through an organic working medium pipeline, an outlet of the working medium pump is connected with a working medium inlet of the working medium preheater through an organic working medium pipeline, and a working medium outlet of the working medium preheater is connected with the working medium inlet of the working medium evaporator through an organic working medium pipeline; in the circulating water loop system, a circulating water outlet of the condenser is connected with a circulating water inlet of the heat user heat exchanger through a hot water supply pipeline, a circulating water outlet of the heat user heat exchanger is connected with an inlet of the circulating water pump through a hot water supply pipeline, an outlet of the circulating water pump is connected with a circulating water inlet of the circulating water preheater through a hot water supply pipeline, and a circulating water outlet of the circulating water preheater is connected with a circulating water inlet of the condenser through a hot water supply pipeline.

In the organic Rankine cycle geothermal power generation and heat supply system, geothermal water exchanges heat with a working medium through the working medium preheater and the evaporator to provide a heat source for a working medium loop system, and the working medium generates electric energy through the working medium loop system; the working medium and the geothermal fluid respectively pass through the condenser and the circulating water preheater and respectively transfer heat to the circulating water, hot water is provided for a user through the heat user heat exchanger, meanwhile, the recharging temperature of the geothermal fluid is reduced, and geothermal resources are fully utilized.

The invention has the advantages that the gradient utilization of geothermal energy can be realized, and the utilization efficiency of low-temperature waste heat is improved; the geothermal fluid recharging temperature is reduced, the energy is fully utilized to produce hot water, the waste heat discharge to the environment is reduced, and the effects of energy conservation and environmental protection are achieved. The overall effect of geothermal utilization of the invention is that power generation and heat supply are organically combined, heat dissipation to the environment is not needed, and the energy-saving effect is obvious.

Drawings

FIG. 1 is a schematic flow diagram of an organic Rankine cycle geothermal power generation and heating system according to the present invention.

In the figure: 1. a production well is produced; 2. a submersible pump; 3. recharging the well; 4. a circulating water preheater; 5. a working medium preheater; 6. an evaporator; 7. a turbine generator set; 8. a condenser; 9. a working medium pump; 10. a water circulating pump; 11. a heat consumer heat exchanger.

Detailed Description

Example 1 the technical solution of the present invention is further described in detail below with reference to the following examples and accompanying drawings. As shown in fig. 1, an organic rankine cycle geothermal power generation and heat supply system includes a geothermal fluid pipeline system, a working medium loop system, and a circulating water loop system; the geothermal fluid pipeline system comprises a production well (1), a submersible pump (2), an evaporator (6), a working medium preheater (5), a circulating water preheater (4) and a recharge well (3), which are sequentially connected through a geothermal fluid pipeline; the working medium loop system comprises a working medium evaporator (6), a turbine generator set (7), a condenser (8), a working medium pump (9) and a working medium preheater (5), which are sequentially connected through a working medium pipeline to form a closed loop; the circulating water loop system comprises a condenser (8), a heat user heat exchanger (11), a circulating water pump (10) and a circulating water preheater (4), which are sequentially connected through a circulating water pipeline to form a closed loop.

The geothermal fluid pipeline system is coupled with the working medium loop system through the working medium preheater (5) and the evaporator (6); the working medium loop system is coupled with the circulating water loop system through the condenser (8); the geothermal fluid pipeline system is coupled with the circulating water loop system through the circulating water preheater (4).

In the working medium loop system, a working medium outlet of the working medium evaporator (6) is connected with a working medium inlet of the turbine generator set (7) through an organic working medium pipeline, a working medium outlet of the turbine generator set (7) is connected with a working medium inlet of the condenser (8) through an organic working medium pipeline, a working medium outlet of the condenser (8) is connected with an inlet of the working medium pump (9) through an organic working medium pipeline, an outlet of the working medium pump (9) is connected with a working medium inlet of the working medium preheater (5) through an organic working medium pipeline, and a working medium outlet of the working medium preheater (5) is connected with the working medium inlet of the working medium evaporator (6) through an organic working medium pipeline; in the circulating water loop system, the circulating water outlet of the condenser (8) is connected with the circulating water inlet of the heat user heat exchanger (11) through a hot water supply pipeline, the circulating water outlet of the heat user heat exchanger (11) is connected with the inlet of the circulating water pump (10) through a hot water supply pipeline, the outlet of the circulating water pump (10) is connected with the circulating water inlet of the circulating water preheater (4) through a hot water supply pipeline, and the circulating water outlet of the circulating water preheater (4) is connected with the circulating water inlet of the condenser (8) through a hot water supply pipeline.

In the organic Rankine cycle geothermal power generation and heat supply system, geothermal water exchanges heat with a working medium through a working medium preheater (5) and an evaporator (6) to provide a heat source for a working medium loop system, and the working medium generates electric energy through the working medium loop system; the working medium and the geothermal water exchange heat with the circulating water through the condenser (8) and the circulating water preheater (4) respectively to transfer the heat of the working medium and the geothermal water to the circulating water; the heat user heat exchanger (11) provides hot water for the heat user to supply heat, reduces the recharge temperature of the geothermal fluid and fully utilizes geothermal resources.

The geothermal water temperature of the exploitation well (1) is 120 ℃, and the flow rate is 100m³H, rechargingThe water temperature of the well (3) is 40 ℃, the power generation power of the turbine generator set (7) is 1400kW, and the heat supply area provided by the heat user heat exchanger (11) is 13 ten thousand meters²。

Example 2 the system of the present invention is constructed in the same manner as in example 1 except that the temperature and amount of geothermal water are different. The geothermal water temperature of the exploitation well (1) is 80 ℃, and the flow rate is 150m³The water temperature of the recharge well (3) is 40 ℃, the power generation power of the turbine generator set (7) is 700kW, and the heat supply area provided by the heat user heat exchanger (11) is 10 ten thousand meters²。

The present invention is not limited to the specific embodiments described herein. Insubstantial changes or modifications without departing from the spirit of the invention are intended to be included within the scope of the invention.