阅读说明：本技术 一种基于微型固体颗粒的重力储能及发电系统 (Gravity energy storage and power generation system based on miniature solid particles ) 是由 薛志恒 赵杰 王伟锋 何欣欣 杨可 贾晨光 陈会勇 王兴 张朋飞 于 2021-04-08 设计创作，主要内容包括：本发明公开了一种基于微型固体颗粒的重力储能及发电系统,包括布置于位置低处的释能料仓和位于高处的储能料仓,所述储能料仓底部通过释能带轮连接释能料仓顶部,所述释能料仓底部通过储能带轮连接至储能料仓顶部,所述储能料仓底部安装发电功率调节阀,释能料仓底部安装储能功率调节阀,所述储能带轮通过变速轮一与电动机相连；释能带轮通过变速轮二与发电机相连。本发明利用微型固体颗粒实现重力储能及发电过程,发电负荷调节连续、稳定、无冲击、调节速率快。(The invention discloses a gravity energy storage and power generation system based on micro solid particles, which comprises an energy release bin arranged at a low position and an energy storage bin arranged at a high position, wherein the bottom of the energy storage bin is connected with the top of the energy release bin through an energy release belt pulley; the energy release belt wheel is connected with the generator through a second variable speed wheel. The invention realizes the processes of gravity energy storage and power generation by utilizing the micro solid particles, and has the advantages of continuous and stable power generation load adjustment, no impact and high adjustment speed.)

1. The gravity energy storage and power generation system based on the micro solid particles is characterized by comprising an energy release bin (7) arranged at a low position and an energy storage bin (6) located at a high position, wherein a discharge port of the energy storage bin (6) is connected with a feed port of the energy release bin (7) through an energy release belt wheel (5), a discharge port of the energy release bin (7) is connected with a feed port of the energy storage bin (6) through an energy storage belt wheel (4), a power generation power regulating valve (9) is installed at the discharge port of the energy storage bin (6), an energy storage power regulating valve (8) is installed at the discharge port of the energy release bin (7), and the energy storage belt wheel (4) is connected with a motor (1) through a first change gear (2); the energy release belt wheel (5) is connected with a generator (11) through a second gearbox wheel (3).

2. The gravity energy storage and power generation system based on micro solid particles as claimed in claim 1, wherein the discharge ports of the energy release bin (7) and the energy storage bin (6) are funnel-shaped, so as to realize automatic falling of micro particles.

3. The gravity energy storage and generation system based on micro solid particles as claimed in claim 1, wherein the energy release pulley (5) is an inclined structure with a certain angle.

4. The gravity energy storage and power generation system based on the micro solid particles as claimed in claim 1, wherein the energy storage belt wheel (4) is a three-section type, the horizontal structures are arranged at the bottom of the energy release bin (7) and the top of the energy storage bin (6), an inclined structure is arranged between the horizontal structures at the two ends, and the angle of the inclined structure is larger than the inclination of the energy release belt wheel (5).

5. The miniature solid particle based gravity energy storage and generation system of claim 1, wherein the miniature solid particles (10) have a size in the range of 1 micron to 50 cm.

6. The micro solid particle-based gravity energy storage and generation system according to claim 1, wherein the discharge port of the energy release bin (7) is located at the bottom thereof, and the feed port is located at the top thereof.

7. The gravity energy storage and power generation system based on micro solid particles as claimed in claim 1, wherein the discharge port of the energy storage bin (6) is located at the bottom thereof, and the feed port is located at the top thereof.

Technical Field

The invention relates to the technical field of gravity energy storage and power generation, in particular to a gravity energy storage and power generation system based on micro solid particles.

Background

Wind power and solar power generation all have randomness, intermittence and instability, and in order to realize power supply and demand balance under the condition that the installed capacity of a new energy power station is continuously increased, the power output stability of a new energy power generation system needs to be improved urgently. The energy storage system can change the mode of synchronously finishing the production, the transmission and the use of electric energy, realizes the staggered utilization of energy in the time dimension, and is a key factor for the rapid development and the effective utilization of new energy such as wind energy, solar energy and the like.

Pumped storage, battery storage and compressed air storage are the most widely studied and applied energy storage modes at present. The pumped storage is convenient to start and stop, quick in response and long in service life, and has the main defects of dependence on geographical positions, difficulty in site selection, long construction period and energy storage efficiency of 70-85%. The battery energy storage technology comprises a lead-acid battery, a lithium battery, a nickel-based battery and the like, the service life is short, the cost is far higher than that of pumped storage, the pumped storage can reach 1.5-13 times, and potential safety hazards such as flammability, explosiveness, heavy metal and the like also make the battery difficult to popularize and apply. The compressed air energy storage technology is mature, large in scale and small in dependence on the geographic environment, and the maximum disadvantage is that the efficiency is too low, namely 42% -55%.

At present, the main type of foreign gravity energy storage systems is based on cement block working media or rail type, and China is still in the theoretical research stage. In addition, the gravity energy storage systems studied in foreign countries all need complex transshipment stacking mechanisms, and the complex transshipment systems are difficult in expansion of energy storage capacity.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention aims to provide a gravity energy storage and power generation system based on micro solid particles, which realizes the gravity energy storage and power generation process by utilizing the micro solid particles, and has the advantages of continuous and stable power generation load adjustment, no impact and high adjustment speed.

In order to achieve the purpose, the invention adopts the technical scheme that:

a gravity energy storage and power generation system based on micro solid particles comprises an energy release bin 7 arranged at a low position and an energy storage bin 6 arranged at a high position, wherein a discharge port of the energy release bin 6 is connected with a feed port of the energy release bin 7 through an energy release belt wheel 5, a discharge port of the energy release bin 7 is connected with a feed port of the energy storage bin 6 through an energy storage belt wheel 4, a power generation regulating valve 9 is installed at a discharge port of the energy storage bin 6, an energy storage power regulating valve 8 is installed at a discharge port of the energy release bin 7, and the energy storage belt wheel 4 is connected with a motor 1 through a first speed change wheel 2; the energy release belt wheel 5 is connected with a generator 11 through a second gearbox wheel 3.

The discharge ports of the energy release bin 7 and the energy storage bin 6 are funnel-shaped and used for realizing automatic falling of the micro particles.

The discharge hole of the energy releasing bin 7 is positioned at the bottom of the energy releasing bin, and the feed hole is positioned at the top of the energy releasing bin.

The discharge hole of the energy storage bin 6 is positioned at the bottom of the energy storage bin, and the feed inlet is positioned at the top of the energy storage bin.

The energy release belt wheel 5 is an inclined structure with a certain angle.

The energy storage belt wheel 4 is of a three-section type, the bottom of the energy release bin 7 and the top of the energy storage bin 6 are of horizontal structures, an inclined structure is arranged between the horizontal structures at the two ends, and the angle of the inclined structure is larger than the inclination of the energy release belt wheel 5.

The micro solid particles 10 range in size from 1 micron to 50 centimeters.

The invention has the beneficial effects that:

(1) through the design of the energy storage bin, the transfer stacking mechanism design based on an intelligent robot is avoided, and the system operation is simpler and more reliable;

(2) the load regulation characteristic in the power generation process of the unit is excellent, and the drop speed of the micro solid particles in the energy storage bin is controlled by the regulating valve, so that the continuous and stable load regulation, no impact and high regulation speed in the power generation process can be realized;

(3) the energy storage working media are diversified, and solid working media with the diameter range of 1 micron-50 cm can be used as energy storage working media materials, so that the energy storage investment cost can be greatly reduced;

(4) the energy storage power generation system can be built in any place, and the desert edge, the mountain side, the rural useless land and the like can be used as the site for building the energy storage power generation system.

Drawings

Fig. 1 is a schematic diagram of a gravity energy storage and power generation system based on micro solid particles.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The gravity energy storage and power generation system based on the micro solid particles as shown in fig. 1 comprises a motor 1, a first variable speed wheel 2, a second variable speed wheel 3, an energy storage belt wheel 4, an energy release belt wheel 5, an energy storage bin 6, an energy release bin 7, an energy storage power regulating valve 8, a power generation power regulating valve 9, micro solid particles 10 and a power generator 11.

The system connection and arrangement relationship is as follows: the energy releasing bin 7 is arranged at a low position, and the energy storing bin 6 is arranged at a high position; the bottoms of the energy storage bin and the energy release bin are funnel-shaped, so that the micro particles can fall automatically; the bottom of the energy storage bin 8 is provided with a power generation regulating valve 9; an energy storage power regulating valve 8 is arranged at the bottom of the energy release bin 7; the energy storage belt wheel 4 is connected with the motor 1 through a first speed changing wheel 2; the energy release belt wheel is connected with a generator 11 through a second gearbox wheel 3.

Compared with other energy storage systems, the gravity energy storage system has the following advantages: 1. the energy storage system has high efficiency, only relates to the conversion of electric energy, kinetic energy and gravitational potential energy, and has no energy dereferencing process, and the efficiency of the energy storage system can reach 90 percent; 2. the cleaning is clean and pollution-free, and the safety and environmental protection problems of carbon emission, heavy metal, flammability, explosiveness and the like do not exist; 3. the service life is long, the cost is low, the service life can reach more than 30 years, and the cost is 700 plus 1100 yuan/kWh; 4. the dependence on the geographic position is small; 5. no need of water and CO₂Or molten salt and other circulating working media, so that no resource is consumed; 6. the capacity characteristic of the energy storage system does not attenuate along with the running time; 7. the power generation system has high response speed which can reach within 3s, and has larger advantages compared with pumped storage and compressed air storageAnd (4) potential.

The working principle of the invention is as follows:

in the energy storage process, the motor 1 and the energy storage power regulating valve 8 are opened, so that the micro solid particles 10 fall from the energy release bin 7 onto the energy storage belt wheel 4 and are then conveyed into the energy storage bin 6 to realize energy storage.

In the energy release process, the energy release belt wheel acceleration, the stable rotating speed and the generator grid-connected power generation process are realized by gradually opening the power generation regulating valve 9; and adjusting the generated power adjusting valve to adjust the load of the generated power after grid connection according to the power grid instruction.

The size range of the micro solid particles 10 is 1 micron-50 cm, and the common micro particles are sand, stone, ash, powder and the like.

The drawings are only for purposes of illustrating the invention and are not to be construed as limiting the scope of the invention, which is intended to be covered by the claims, since certain insubstantial modifications and adaptations of the invention may occur to those skilled in the art in light of the foregoing description.