High-pressure compressed air heat exchanger matched with energy storage system

Abstract

The utility model discloses a high-pressure compressed air heat exchanger matched with an energy storage system, which relates to the technical field of air heat exchangers and comprises a structural support frame, an input flue gas main pipe is fixedly mounted in an inner cavity of the structural support frame, and a vertical heat exchanger is fixedly mounted in the inner cavity of the structural support frame. A flue gas output main pipe located above the flue gas input main pipe is fixedly installed in an inner cavity of the structure supporting frame. Through the design of the input flue gas mother pipe and the air inlet pipeline, high-temperature flue gas output by a thermal generator set can be guided into the inner cavity of the vertical heat exchanger, and through the design of the output compressed air mother pipe, low-temperature high-pressure gas can be conveyed into the topmost heat exchanger pipe set. The low-temperature and high-pressure gas can exchange heat with the high-temperature flue gas by means of the heat exchanger tube group and is processed into high-temperature and high-pressure gas which is supplied to the air turbine for power generation, so that the requirement of power production can be met, and the utilization efficiency of energy is improved.

Description

Technical Field

[0001] This utility model relates to the field of air heat exchanger technology, specifically to a high-pressure compressed air heat exchanger for an energy storage system. Background Technology

[0002] Thermal power generation is a technological process that generates heat energy by burning fossil fuels or other combustible materials, converts that heat energy into mechanical energy, and ultimately drives a generator to produce electricity. Specifically, the basic production process of thermal power generation is as follows: fuel is burned in a boiler, heating water to generate steam, converting the chemical energy of the fuel into heat energy; the steam pressure drives a turbine to rotate, converting the heat energy into mechanical energy; then the turbine drives a generator to rotate, converting the mechanical energy into electrical energy. Large thermal power generating units produce a large amount of high-temperature flue gas during operation. The heat inside this high-temperature flue gas has high recovery and utilization value, therefore heat exchangers are needed for heat recovery treatment.

[0003] Existing heat exchangers can only exchange heat for gases at normal pressures, while air turbines generate electricity by being driven by high-temperature and high-pressure gases. Existing heat exchangers cannot output high-temperature and high-pressure gases for use by air turbines, thus failing to meet the needs of power production and requiring improvement. Utility Model Content

[0004] The purpose of this invention is to provide a high-pressure compressed air heat exchanger for an energy storage system, in order to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A high-pressure compressed air heat exchanger for an energy storage system includes a structural support frame. An input flue gas header is fixedly installed in the inner cavity of the structural support frame. A vertical heat exchanger is fixedly installed in the inner cavity of the structural support frame. An output flue gas header located above the input flue gas header is fixedly installed in the inner cavity of the structural support frame. An inlet pipe is fixedly connected to the outer wall of the vertical heat exchanger near the bottom. An exhaust pipe is fixedly connected to the outer wall of the vertical heat exchanger near the top. The end of the inlet pipe away from the vertical heat exchanger is fixedly connected to the outer wall of the input flue gas header. The end of the exhaust pipe away from the vertical heat exchanger is fixedly connected to the outer wall of the output flue gas header. A heat exchanger tube assembly is fixedly installed on the inner wall of the vertical heat exchanger.

[0007] Preferably, the number of internal heat exchanger tube assemblies in one of the vertical heat exchangers is set to six, and the output end of the upper heat exchanger tube assembly is fixedly connected to the input end of the lower heat exchanger tube assembly.

[0008] Preferably, the input end of the heat exchanger tube group at the top is fixedly connected to an output compressed air header, and the output end of the heat exchanger tube group at the bottom is fixedly connected to a recovery compressed air header.

[0009] Preferably, the inner diameter of the input flue gas header and the output flue gas header is set to 4000mm, the inner diameter of the vertical heat exchanger is set to 3200mm, and the inner diameter of the inlet pipe and the outlet pipe is set to 2000mm.

[0010] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows:

[0011] This invention provides a high-pressure compressed air heat exchanger for an energy storage system, addressing the problem that existing heat exchangers cannot output high-temperature, high-pressure gas for use in air turbines. Through the design of the inlet flue gas header and intake pipe, the high-temperature flue gas output from the thermal power generator unit can be guided into the inner cavity of the vertical heat exchanger, allowing it to flow from bottom to top. The compressed air header design also allows low-temperature, high-pressure gas to be delivered to the top heat exchanger tube assembly. This gas then flows downwards within the tube assembly, exchanging heat with the high-temperature flue gas to transform it into high-temperature, high-pressure gas, which is then supplied to the air turbine for power generation. This design meets the needs of power production and improves energy utilization efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a side view of the present invention.

[0014] Figure 3 This is a top view of the structure of this utility model.

[0015] In the diagram: 1. Structural support frame; 2. Inlet flue gas header; 3. Vertical heat exchanger; 31. Inlet pipe; 32. Exhaust pipe; 4. Outlet flue gas header; 5. Heat exchanger tube assembly. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to embodiments:

[0017] like Figures 1-3As shown, this utility model provides a high-pressure compressed air heat exchanger for an energy storage system, including a structural support frame 1. An input flue gas header 2 is fixedly installed in the inner cavity of the structural support frame 1. A vertical heat exchanger 3 is fixedly installed in the inner cavity of the structural support frame 1. An output flue gas header 4, located above the input flue gas header 2, is fixedly installed in the inner cavity of the structural support frame 1. An inlet pipe 31 is fixedly connected to the outer wall of the vertical heat exchanger 3 near its bottom. An exhaust pipe 32 is fixedly connected to the outer wall of the vertical heat exchanger 3 near its top. The end of the inlet pipe 31 away from the vertical heat exchanger 3 is fixedly connected to the outer wall of the input flue gas header 2. The end of the exhaust pipe 32 away from the vertical heat exchanger 3 is fixedly connected to the outer wall of the output flue gas header 4. A heat exchanger tube assembly 5 is fixedly installed on the inner wall of the vertical heat exchanger 3. During off-peak hours at night, a large amount of atmospheric air is compressed to 12 MPa by a compressor and stored in a cryogenic air tank. During peak hours during the day, the high-temperature flue gas generated by the thermal power generator unit flows through the inner cavity of the vertical heat exchanger 3. At this time, the gas in the cryogenic air tank is transported to the heat exchanger tube group 5 through the output compressed air header. The cryogenic high-pressure gas can exchange heat with the high-temperature flue gas through the heat exchanger tube group 5, so that the heat exchanger tube group 5 can output high-temperature high-pressure gas, which passes through the recovery compressed air header and is then transported to the air turbine for power generation through an external pipeline. During the process, the temperature of the flue gas generated by the thermal power generator unit is 229 degrees Celsius, the temperature of the air entering the heat exchanger tube group 5 is 40 degrees Celsius, and the temperature of the high-pressure gas output from the heat exchanger tube group 5 is 204 degrees Celsius.

[0018] Furthermore, such as Figures 1-3 As shown, the number of internal heat exchanger tube groups 5 in a vertical heat exchanger 3 is set to six. The output end of the upper heat exchanger tube group 5 is fixedly connected to the input end of the lower heat exchanger tube group 5. The input end of the top heat exchanger tube group 5 is fixedly connected to an output compressed air header, and the output end of the bottom heat exchanger tube group 5 is fixedly connected to a recovery compressed air header. The output compressed air header is connected to an external cryogenic air tank, and the recovery compressed air header is connected to an air turbine through a pipeline to facilitate gas processing.

[0019] Furthermore, such as Figures 1-3 As shown, the inner diameter of the input flue gas header 2 and the output flue gas header 4 is set to 4000mm, the inner diameter of the vertical heat exchanger 3 is set to 3200mm, and the inner diameter of the inlet pipe 31 and the exhaust pipe 32 is set to 2000mm. The pipe diameter design of the input flue gas header 2, the vertical heat exchanger 3, the output flue gas header 4, the inlet pipe 31, and the exhaust pipe 32 facilitates the smooth and efficient passage of high-temperature flue gas through the equipment. The number of vertical heat exchangers 3 is set to sixteen to facilitate transportation and assembly.

[0020] The working principle of the high-pressure compressed air heat exchanger supporting the energy storage system will be specifically described below.

[0021] As Figures 1-3 shown, the output compressed air header is pre-connected to an external low-temperature air tank, and the recovery compressed air header is connected to an air turbine through a pipeline. During the valley electricity period at night, a large amount of atmospheric air is compressed to 12 MPa by a compressor and stored in the low-temperature air tank. During the peak electricity period during the day, the high-temperature flue gas generated by the operation of the thermal power generating unit will flow through the inner cavity of the vertical heat exchanger 3. At this time, the gas in the low-temperature air tank is transported through the output compressed air header to the heat exchanger tube bundle 5. The low-temperature and high-pressure gas can exchange heat with the high-temperature flue gas by means of the heat exchanger tube bundle 5, so that high-temperature and high-pressure gas can be output in the heat exchanger tube bundle 5, pass through the recovery compressed air header, and then be transported to the air turbine through an external pipeline to do work and generate electricity.

[0022] It should be noted that in the description of the present disclosure, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0023] The above has generally described the present invention in detail, but based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, the modifications or improvements that do not depart from the spirit of the present invention are all within the protection scope of the present invention.

Claims

1. A high-pressure compressed air heat exchanger for an energy storage system, characterized in that: The device includes a structural support frame, in which an input flue gas header is fixedly installed. A vertical heat exchanger is also fixedly installed within the inner cavity of the structural support frame. An output flue gas header located above the input flue gas header is also fixedly installed within the inner cavity of the structural support frame. An inlet pipe is fixedly connected to the outer wall of the vertical heat exchanger near its bottom, and an exhaust pipe is fixedly connected to the outer wall of the vertical heat exchanger near its top. The end of the inlet pipe furthest from the vertical heat exchanger is fixedly connected to the outer wall of the input flue gas header, and the end of the exhaust pipe furthest from the vertical heat exchanger is fixedly connected to the outer wall of the output flue gas header. Heat exchanger tube assemblies are fixedly installed on the inner wall of the vertical heat exchanger.

2. The high-pressure compressed air heat exchanger for an energy storage system according to claim 1, characterized in that: The number of internal heat exchanger tube assemblies in one of the vertical heat exchangers is set to six.

3. A high-pressure compressed air heat exchanger for an energy storage system according to claim 2, characterized in that: The output end of the heat exchanger tube assembly located above is fixedly connected to the input end of the heat exchanger tube assembly located below.

4. A high-pressure compressed air heat exchanger for an energy storage system according to claim 2, characterized in that: The input end of the heat exchanger tube assembly located at the top is fixedly connected to the output compressed air header.

5. A high-pressure compressed air heat exchanger for an energy storage system according to claim 2, characterized in that: The output end of the heat exchanger tube assembly located at the bottom is fixedly connected to a compressed air recovery header.

6. A high-pressure compressed air heat exchanger for an energy storage system according to claim 1, characterized in that: The inner diameters of the input flue gas header and the output flue gas header are equal, and the inner diameters of both the input flue gas header and the output flue gas header are 4000mm.

7. A high-pressure compressed air heat exchanger for an energy storage system according to claim 1, characterized in that: The inner diameter of the pipes in the vertical heat exchanger is set to 3200 mm.

8. A high-pressure compressed air heat exchanger for an energy storage system according to claim 1, characterized in that: The inner diameters of the intake pipe and the exhaust pipe are equal, and the inner diameter of both the intake pipe and the exhaust pipe is 2000mm.

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