CN210858829U - A biomass organic Rankine cycle power generation system controlled by pumped storage - Google Patents

Abstract

The utility model discloses a biomass organic Rankine cycle power generation system controlled by pumped storage energy, comprising a biomass direct-fired hot water boiler subsystem, an organic Rankine cycle power generation subsystem and a pumped storage energy control subsystem. The hot water boiler subsystem is coupled with the organic rankine cycle power generation subsystem through the evaporator, and the organic rankine cycle power generation subsystem is coupled with the pumped storage control subsystem, so that the electric energy generated by the organic rankine cycle power generation subsystem can be supplied to life. And industrial electricity, the excess electricity can also be used for pumped storage. The system designed by the utility model can utilize the energy more effectively by adding an organic Rankine cycle power generation system and a pumped storage energy regulation subsystem in the process of heating or central heating by burning biomass.

Description

A biomass organic Rankine cycle power generation system controlled by pumped storage

technical field

The utility model belongs to the technical field of organic Rankine cycle power generation, in particular to a biomass organic Rankine cycle power generation system controlled by pumped storage energy.

Background technique

Biomass energy has the advantages of abundant resources, renewable, low pollution, etc., which makes its utilization value in human life and social activities continue to increase. According to reports, biomass energy has risen to the fourth place after fossil energy coal, oil and natural gas. my country has abundant biomass energy resources, especially in North China, Central China, Northeast China and other regions. According to estimates, my country's theoretical biomass energy resources are about 5 billion tons of standard coal, which is about 4 times the current total energy consumption in China. Under the condition of recyclability, the biomass energy resources currently available in China mainly include crop straw, fuelwood, domestic waste, and microalgae.

According to statistics, most counties in China are limited by population size, building area and other conditions, and do not have the conditions to build large-scale coal-fired gas-fired cogeneration projects. Biomass heating is an effective way to solve the problem of clean heating in the county. The biomass energy heating project is not large in scale, and is especially suitable for the district heating of the county.

In the current biomass heating projects, most of them use a single briquette fuel boiler for heating, that is, biomass resources such as straw are processed by solid compression molding technology and then sent to the supporting biomass special boiler for combustion, and the high temperature flue gas generated by the combustion is produced. Delivered to users for cooking or heating. Although the use of biomass energy for heating is less polluting, a large amount of energy is lost in the process of heat transportation, and biomass resources cannot be fully utilized. Therefore, it is urgent to design a method that can reasonably and fully utilize biomass energy.

Utility model content

According to the problems existing in the prior art, the utility model proposes a biomass organic Rankine cycle power generation system controlled by pumped storage energy. The power generation system and pumped-storage control subsystem can realize energy utilization more efficiently.

The technical scheme adopted by the utility model is as follows:

A biomass organic Rankine cycle power generation system regulated by pumped storage, comprising a biomass direct-fired hot water boiler subsystem, an organic Rankine cycle power generation subsystem and a pumped-storage control subsystem, the biomass direct-fired hot water The boiler subsystem is coupled with the organic Rankine cycle power generation subsystem through the evaporator, and the organic Rankine cycle power generation subsystem is coupled with the pumped-storage control subsystem, so that the electric energy generated by the organic Rankine cycle power generation subsystem can be supplied to both living and Industrial electricity can also be used for pumped storage of excess electricity.

Further, the biomass direct-fired hot water boiler subsystem includes a biomass direct-fired boiler and an evaporator that are sequentially connected to form a loop;

Further, a hot water heat exchanger is added in the rear section of the evaporator to heat domestic water;

Further, the organic Rankine cycle power generation subsystem includes an evaporator, an expander, a condenser and a working fluid pump that are sequentially connected to form a loop; the expander is connected to a generator;

Further, the pumped-storage control subsystem includes an energy supply grid connected to the user and a pumped-storage device, the input of the pumped-storage device is connected to a generator, and the output of the pumped-storage device is a hydroelectric generator, so The hydroelectric generator is connected to the user's energy supply grid.

The beneficial effects of the present utility model:

On the one hand, the system uses biomass heating to effectively utilize biomass resources, which is of great significance to replace some fossil energy, protect the ecological environment, and realize the effective use of renewable resources. On the other hand, the organic Rankine cycle is combined to avoid a large amount of energy loss caused by burning biomass for heating or central heating. In addition, the excess electricity is regulated by pumped storage, which can play the roles of peak regulation, frequency regulation, phase regulation, emergency backup and so on.

Description of drawings

1 is a block diagram of a biomass organic Rankine cycle power generation system regulated by pumped storage of the present invention;

In the figure, 1. Biomass direct-fired boiler, 2. Evaporator, 3. Hot water heat exchanger, 4. Working fluid pump, 5. Expander, 6. Condenser, 7. Generator, 8. Suction pump, 9. Hydroelectric generator.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

As shown in Figure 1, a biomass organic Rankine cycle power generation system regulated by a pumped storage energy system designed by the present utility model includes a biomass direct-fired hot water boiler subsystem, an organic Rankine cycle power generation subsystem and a pumped storage energy storage system. control subsystem. The biomass direct-fired hot water boiler subsystem includes a biomass direct-fired boiler 1, an evaporator 2 and a hot water heat exchanger 3 that are connected in sequence to form a loop. Combustion is carried out in 1, the water in the boiler is heated into steam, the steam exchanges heat in the evaporator 2, and then the domestic water is heated in the hot water heat exchanger 3. The water vapor after heat exchange becomes liquid water and enters the biomass direct-fired boiler 1 for the next cycle.

The organic Rankine cycle power generation subsystem includes an evaporator 2, an expander 5, a condenser 6 and a working fluid pump 4 that are sequentially connected to form a loop, and the expander 5 is connected to a generator 7; the organic Rankine cycle power generation subsystem and the biomass direct The hot water boiler subsystem is coupled through the evaporator 2 . During the working cycle, the circulating working fluid in the organic Rankine cycle power generation subsystem absorbs the heat of water vapor in the evaporator 2 and enters the expander 5 to do work. The expander 5 drives the generator 7 to generate electricity through the rotating shaft, and the generated electricity It is supplied to users, and the circulating working medium after work enters the condenser 6, and after condensing into a liquid state, it is pumped into the evaporator 2 again through the working medium pump 4 for the next cycle. The expander drives the generator to generate electricity through the rotating shaft, and the generated electricity is supplied to the user.

The pumped-storage control subsystem includes the energy supply grid and pumped-storage equipment connected to the user. During the peak period of power load, the electricity generated by the organic Rankine cycle power generation subsystem is directly used for user or industrial use; During the trough period, the excess electricity is used to drive the pumping pump, and the pumping pump is used to send the water in the lower reservoir to the upper reservoir. During the peak power load period, the electricity generated by the organic Rankine cycle power generation subsystem or the excess electricity makes the pumping pump 8 work. , the upper reservoir water will be released to generate electricity and flow into the lower reservoir. The electricity generated by the hydroelectric generator 9 is again delivered to the user for use.

In the prior art, the biomass direct-fired hot water boiler 1 is used to heat domestic water to achieve heating or central heating. However, due to the high temperature of the inner water vapor, if it is directly used to heat the domestic water for users, it may cause a large amount of heat. Therefore, an organic Rankine cycle power generation subsystem is added between the direct-fired boiler 1 and the hot water heat exchanger 3. This will not affect the supply of hot water to users and the use of energy loss in the process to generate electricity.

Considering that people have the phenomenon of peak period and trough period of electricity consumption in the process of electricity consumption, the utility model is provided with a pumped-storage energy control subsystem after the organic Rankine cycle power generation subsystem, and the pumped-storage mainly plays the role of regulation and control. The excess electricity after being supplied to users is used for pumping water, and when users need a lot of electricity, the water is released from a high place, and the power is generated by gravity and organic Rankine cycle power generation for users to use. Combining biomass combustion for heating, organic Rankine cycle power generation and pumped storage, the system reduces energy loss in the process of burning biomass for heating, provides electricity, and can adjust peaks and fill valleys at the same time.

The above embodiments are only used to illustrate the design ideas and features of the present invention, and the purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications made according to the principles and design ideas disclosed in the present invention are all within the protection scope of the present invention.

Claims (5)

1. a biomass organic Rankine cycle power generation system regulated by pumped storage, is characterized in that, comprises biomass direct-fired hot water boiler subsystem, organic Rankine cycle power generation subsystem and pumped storage regulation subsystem, described The biomass direct-fired hot water boiler subsystem is coupled with the organic Rankine cycle power generation subsystem through the evaporator (2). The electricity generated by the system can not only be used for domestic and industrial use, but also the excess electricity can be used for pumped storage. 2. The biomass organic Rankine cycle power generation system regulated by a kind of pumped storage energy according to claim 1, is characterized in that, the biomass direct-fired hot water boiler subsystem comprises the biomass direct-fired boilers ( 1) and the evaporator (2). 3. The biomass organic Rankine cycle power generation system regulated by a pumped storage energy according to claim 2, wherein a hot water heat exchanger (3) is added in the rear section of the evaporator (2) for Domestic water for heating. 4 . The biomass organic Rankine cycle power generation system regulated by pumped storage according to claim 1 , wherein the organic Rankine cycle power generation subsystem comprises evaporators ( 2 ) that are sequentially connected to form a loop, 4 . An expander (5), a condenser (6) and a working fluid pump (4); the expander (5) is connected to a generator (7). 5 . The biomass organic Rankine cycle power generation system regulated by pumped storage according to claim 1 , wherein the pumped storage regulation subsystem comprises an energy supply grid connected to a user and a pumped storage device. 6 . , the input of the pumped storage device is connected to a generator (7), the output of the pumped storage device is a hydroelectric generator (9), and the hydroelectric generator (9) is connected to the user's energy supply grid.

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