CN-224230740-U - Electric stove and compressed air energy storage coupling comprehensive utilization system

Abstract

The utility model discloses an electric furnace and compressed air energy storage coupling comprehensive utilization system which comprises a power generation unit, an electric furnace and a motor, wherein the motor is connected with a compressor, the electric furnace and the motor further comprise a first heat exchanger, a second heat exchanger and a third heat exchanger, a first inlet of the first heat exchanger is connected with an outlet of the compressor, a first outlet of the first heat exchanger is connected with an inlet of an air storage tank, a second inlet of the first heat exchanger is connected with an outlet of a low-temperature water tank, a second outlet of the first heat exchanger is connected with an inlet of a high Wen Shuiguan, a first outlet of the third heat exchanger is connected with the power generation unit, a second outlet of the third heat exchanger and a second inlet of the third heat exchanger are respectively connected with a waste heat inlet and a waste heat outlet of a flue gas waste heat recovery device, and a flue gas outlet of the electric furnace is connected with the flue gas waste heat recovery device. According to the utility model, the electric furnace flue gas is directly used for heating the compressed air at the inlet of the compressed air energy storage expander through the flue gas waste heat recovery device, so that the stability of the flue gas waste heat is not required, the flue gas waste heat recovery and utilization efficiency is improved, and the comprehensive efficiency of compressed air energy storage is improved.

Inventors

• WANG CHENGLONG
• WANG JIANXUAN
• ZHAO MENGLI
• CHANG LIUJUN
• WANG LIPENG
• WANG ZHENHUA

Assignees

• 陕西鼓风机（集团）有限公司

Dates

Publication Date

20260512

Application Date

20250509

Claims (2)

1. 1. The electric furnace and compressed air energy storage coupling comprehensive utilization system comprises a power generation unit (1), an electric furnace (2) and a motor (3), wherein the motor (3) is connected with a compressor (4), and the electric furnace and compressed air energy storage coupling comprehensive utilization system is characterized by further comprising a first heat exchanger (5), a second heat exchanger (6) and a third heat exchanger (7); The first inlet of the first heat exchanger (5) is connected with the outlet of the compressor (4), and the first outlet of the first heat exchanger (5) is connected with the inlet of the air storage tank (8); the second inlet of the first heat exchanger (5) is connected with the outlet of the low-temperature water tank (9), and the second outlet of the first heat exchanger (5) is connected with the inlet of the high Wen Shuiguan (10); the first inlet of the first heat exchanger (5) is communicated with the first outlet of the first heat exchanger (5), and the second inlet of the first heat exchanger (5) is communicated with the second outlet of the first heat exchanger (5); The water inlet of the low-temperature water tank (9) is connected with the first outlet of the second heat exchanger (6), and the water outlet of the high Wen Shuiguan (10) is connected with the first inlet of the second heat exchanger (6); the second inlet of the second heat exchanger (6) is connected with the outlet of the air storage tank (8), and the second outlet of the second heat exchanger (6) is connected with the first inlet of the third heat exchanger (7); The first inlet of the second heat exchanger (6) is communicated with the first outlet of the second heat exchanger (6), and the second inlet of the second heat exchanger (6) is communicated with the second outlet of the second heat exchanger (6); The first outlet of the third heat exchanger (7) is connected with the power generation unit (1), the second outlet of the third heat exchanger (7) is connected with the waste heat inlet of the flue gas waste heat recovery device (11), the second inlet of the third heat exchanger (7) is connected with the waste heat outlet of the flue gas waste heat recovery device (11), and the flue gas outlet of the electric furnace (2) is connected with the flue gas waste heat recovery device (11); The first outlet of the third heat exchanger (7) is communicated with the first outlet of the third heat exchanger (7), and the second inlet of the third heat exchanger (7) is communicated with the second outlet of the third heat exchanger (7).
2. 2. The electric furnace and compressed air energy storage coupling comprehensive utilization system according to claim 1, wherein the power generation unit (1) comprises a generator (1-1) and an expander (1-2) connected with the generator (1-1), and the expander (1-2) is also connected with the first outlet of the third heat exchanger (7).

Description

Electric stove and compressed air energy storage coupling comprehensive utilization system Technical Field The utility model relates to the technical field of energy storage, in particular to an electric furnace and compressed air energy storage coupling comprehensive utilization system. Background The electric furnace is a heating furnace which converts electric energy in the furnace into heat to heat a workpiece. The energy consumption of electric furnace steelmaking is mainly electric energy, so that electric furnace users generally adopt peak avoidance and valley avoidance production, and the production cost is reduced. However, the production of the grain can cause the reduction of steelmaking capacity due to peak avoidance, and the sales income is influenced. The production of the electric furnace belongs to intermittent production, the production period of each furnace is 30-40 minutes, almost no smoke is generated in the tapping period, and the smoke of the electric furnace is in an unstable state. The prior technical proposal is that the high-temperature flue gas generates steam through a boiler and generates electricity after being mixed with other steam. The compressed air energy storage refers to an energy storage mode that electric energy is used for compressed air in a low-load period of a power grid, and the compressed air is released in a high-load period of the power grid to drive an expander to drive a generator to generate electricity. The expansion generator set grid connection refers to synchronously integrating generators into a power grid to deliver electric energy to the power grid. The compressed air energy storage refers to an energy storage mode that electric energy is used for compressed air in a low-load period of a power grid, and the compressed air is released to push a steam turbine to generate power in a high-load period of the power grid. The prior technical proposal is that normal pressure air is compressed into high pressure and high temperature air by a blower unit, the high temperature and high pressure air exchanges heat with water or other mediums into high pressure and low temperature air, and the high pressure and high temperature air is stored in a gas storage device. The high-temperature hot water or other mediums after heat exchange are stored in the heat storage device. The gas storage device releases high-pressure low-temperature air, and the high-pressure air is subjected to heat exchange Cheng Gaowen with hot water or other mediums in the heat storage device through the heat exchange device, so that the expansion generator set is driven by the high-temperature high-pressure air to generate power. Because the electric furnace is intermittently produced, the steam for recovering the waste heat of the flue gas is unstable, and the steam needs to be mixed with other steam for use, so that the efficiency is low. Meanwhile, when the electric furnace is used for avoiding peaks and producing valleys, the residual heat of the flue gas of the electric furnace cannot be recycled because the electric furnace is not produced for a long time every day, and energy waste is caused. (2) The electric furnace consumes electric energy mainly, the peak value time period electricity price is higher, and the electric furnace production cost is higher, so that the electric furnace can adopt peak avoidance to produce on valley, and the full load production cannot be realized, the yield is low, and the income is low. (3) The conventional technical scheme of compressed air energy storage is that the high-pressure low-temperature air at the inlet of an expander is heated into high-temperature high-pressure air through an internal heat storage device, and then an expansion generator set is driven to generate electricity, so that the comprehensive efficiency of the system is low. Disclosure of Invention Aiming at the defects of the prior art, the utility model aims to provide an electric furnace and compressed air energy storage coupling comprehensive utilization system, which solves the problems of unstable flue gas waste heat recovery, low utilization efficiency and low efficiency of a compressed air energy storage system of electric furnace flue gas in the prior art. In order to solve the technical problems, the electric furnace and compressed air energy storage coupling comprehensive utilization system is realized by adopting the following technical scheme that the electric furnace and compressed air energy storage coupling comprehensive utilization system comprises a power generation unit, an electric furnace and a motor, wherein the motor is connected with a compressor, and further comprises a first heat exchanger, a second heat exchanger and a third heat exchanger. The first inlet of the first heat exchanger is connected with the outlet of the compressor, and the first outlet of the first heat exchanger is connected with the inlet of the air storage tank. The second inlet of the fi