An auxiliary integrated power generation system utilizing waste heat

Abstract

The present invention relates to the field of power generation technology, and more specifically, to an auxiliary integrated power generation system utilizing waste heat. The system comprises multiple power generation units, a waste heat collection device, and a heat exchange pipeline. The waste heat collection device includes a heat collection tank with a hot water outlet. The heat exchange pipeline originates from the hot water outlet of the heat collection tank and sequentially passes through each power generation unit in an S-shape. The multiple power generation units are connected in parallel. The power generation units include a piezoelectric box and an energy storage tank, each of which is disposed in permafrost. This system recycles waste heat for auxiliary power generation, is low-cost, clean, and environmentally friendly, and offers excellent economic benefits. It effectively addresses the issues of winter electricity shortages in permafrost areas and the waste of thermal resources in traditional thermal power generation.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation, and in particular to an auxiliary integrated power generation system utilizing waste heat. Background Art

[0002] my country's cold regions are widespread, with permafrost covering 417.4 million square kilometers, or 43.5% of the country's land area. These permafrost areas are primarily found in the Qinghai-Tibet Plateau, the Tianshan region of Xinjiang, the three northeastern provinces, and central and eastern Inner Mongolia. With the development of the six major economic corridors, resource development in these regions will be significantly intensified. However, power shortages in these permafrost regions remain a significant obstacle to development and impact people's livelihoods.

[0003] Currently, cold regions rely mainly on thermal power plants for electricity. However, due to the sparse population in these regions, the excess heat from thermal power plants is not fully utilized and is mostly discarded, resulting in a huge waste of thermal resources.

[0004] In response to the above problems, the present invention proposes an integrated auxiliary power generation system based on permafrost expansion and utilizing waste heat from thermal power generation, which effectively solves the problems of winter electricity shortage in permafrost areas and waste of thermal resources in traditional thermal power generation. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide an auxiliary integrated power generation system that utilizes waste heat to effectively solve the problems of electricity shortage in frozen areas in winter and waste of thermal resources in traditional thermal power generation.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions to achieve them.

[0007] An auxiliary integrated power generation system utilizing waste heat includes multiple power generation units, a waste heat collection device and a heat exchange pipeline; the waste heat collection device includes a heat collection tank, which is provided with a hot water outlet; the heat exchange pipeline starts from the hot water outlet of the heat collection tank and passes around each power generation unit in an S shape; the multiple power generation units are connected in parallel; the power generation unit includes a piezoelectric box and an energy storage tank, which are set in frozen soil.

[0008] Preferably, the piezoelectric box includes a first rectangular cylinder with an upper opening and a first piston, each of which is made of rigid material, a pressure plate is provided at the upper end of the first piston, and a horizontal first piston bottom surface is provided at the lower end; the lower end of the first piston is provided in the first rectangular cylinder and can move up and down along the axial direction of the first rectangular cylinder; a horizontal first elastic diaphragm is also provided inside the first rectangular cylinder between the bottom surface of the first piston and the bottom surface of the first rectangular cylinder; a first closed cavity is formed between the bottom surface of the first piston and the first elastic diaphragm, and a second closed cavity is formed between the first elastic diaphragm and the bottom surface of the first rectangular cylinder; antifreeze is provided in the first closed cavity, and multiple groups of piezoelectric ceramic motors are provided in the antifreeze, and the positive and negative poles of the piezoelectric ceramic motors are respectively provided with wires extending out of the first closed cavity; compressible gas is provided in the second closed cavity.

[0009] Preferably, a first pipe is provided on the side wall of the first rectangular cylinder corresponding to the first closed cavity, a valve is provided on the first pipe, and the first pipe is connected to one end of the valve, and the energy storage tank comprises a second rectangular cylinder with an upper opening and a second piston, each of which is made of rigid material; a pressure plate is provided at the upper end of the second piston, and a horizontal second piston bottom surface is provided at the lower end; the lower end of the second piston is provided in the second rectangular cylinder and can move up and down along the axial direction of the second rectangular cylinder; a horizontal second elastic diaphragm is also provided inside the second rectangular cylinder between the bottom surface of the second piston and the bottom surface of the second rectangular cylinder; a third closed cavity is formed between the bottom surface of the second piston and the second elastic diaphragm, and a fourth closed cavity is formed between the second elastic diaphragm and the bottom surface of the second rectangular cylinder; the third closed cavity is provided with compressible gas, and the fourth closed cavity is provided with antifreeze; the fourth closed cavity is also provided with a second pipe; the second pipe is connected to the other end of the valve.

[0010] Preferably, the rigid material is stainless steel.

[0011] Preferably, the auxiliary integrated power generation system utilizing waste heat further comprises a power storage station, and the conductors of the multiple groups of power generation units are electrically connected to the power storage station.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention recycles waste heat to assist in power generation, which is low-cost, clean, environmentally friendly, and has good economic benefits. It effectively solves the problems of winter electricity shortage in frozen areas and waste of thermal resources in traditional thermal power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 It is a structural diagram of the auxiliary integrated power generation system;

[0016] Figure 2 is a structural diagram of a power generation unit;

[0017] The accompanying drawings are marked as follows: 1. Power generation unit, 2. Storage station, 3. Waste heat collection device, 4. Heat exchange pipe,

[0018] 11. First rectangular cylinder, 12. First piston, 13. Elastic diaphragm, 14. First closed chamber, 15. Second closed chamber, 16. Piezoelectric ceramic motor, 17. Valve, 18. Second rectangular cylinder, 19. Second piston, 110. Second elastic film, 111. Third closed chamber, 112. Fourth closed chamber. DETAILED DESCRIPTION

[0019] The embodiments of the present invention will be described in detail below with reference to examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention.

[0020] refer to Figure 1 , a schematic diagram of the auxiliary integrated power generation system of the present invention. This auxiliary integrated power generation system utilizes waste heat and includes multiple power generation units 1, a waste heat collection device 3, and a heat exchange pipe 4. The waste heat collection device 3 includes a heat collection tank with a hot water outlet. The heat exchange pipe 4 originates from the hot water outlet of the heat collection tank and forms an S-shape, passing through each power generation unit in sequence. The multiple power generation units 1 are connected in parallel. Each power generation unit 1 includes a piezoelectric box and an energy storage tank, which are placed in frozen soil.

[0021] Furthermore, the piezoelectric box includes a first rectangular cylinder 11 and a first piston 12, each made of a rigid material and having an upper opening. The first piston 12 has a pressure plate at its upper end and a horizontal first piston bottom at its lower end. The lower end of the first piston 12 is disposed within the first rectangular cylinder 11 and is movable up and down along the axis of the first rectangular cylinder 11. A first horizontal elastic diaphragm 13 is also disposed within the first rectangular cylinder 11, between the first piston bottom and the bottom of the first rectangular cylinder 11. A first enclosed chamber 14 is formed between the first piston bottom and the first elastic diaphragm 13, and a second enclosed chamber 15 is formed between the first elastic diaphragm 13 and the bottom of the first rectangular cylinder 11. Antifreeze fluid is disposed within the first enclosed chamber 14, and multiple piezoelectric ceramic motors 16 are disposed within the antifreeze fluid. The positive and negative electrodes of the piezoelectric ceramic motors 16 are each provided with a wire extending outside the first enclosed chamber. Compressible gas is disposed within the second enclosed chamber 15. In this embodiment, the rigid material is stainless steel.

[0022] Furthermore, a first pipe is provided on the side wall of the first rectangular cylinder 11 corresponding to the first enclosed chamber 14. A valve 17 is provided on the first pipe, and the first pipe is connected to one end of the valve 17. The energy storage tank includes a second rectangular cylinder 18 and a second piston 19, each made of a rigid material with an upper opening. The second piston 19 has a pressure plate at its upper end and a horizontal second piston bottom surface at its lower end. The lower end of the second piston 19 is disposed within the second rectangular cylinder 18 and is movable up and down along the axis of the second rectangular cylinder 18. A horizontal second elastic diaphragm 110 is also provided within the second rectangular cylinder 18 between the second piston bottom surface and the second rectangular cylinder 18 bottom surface. A third enclosed chamber 111 is formed between the second piston bottom surface and the second elastic diaphragm 110, and a fourth enclosed chamber 112 is formed between the second elastic diaphragm and the second rectangular cylinder 18 bottom surface. The third enclosed chamber contains compressible gas, and the fourth enclosed chamber contains antifreeze liquid. The fourth enclosed chamber 112 is also provided with a second pipe, and the second pipe is connected to the other end of the valve 17. In this embodiment, the rigid material is stainless steel.

[0023] Furthermore, the auxiliary integrated power generation system utilizing waste heat of the present invention further includes a storage station 2, and the conductors of the plurality of power generation units 1 are electrically connected to the positive and negative electrodes of the storage station 2 for storing electrical energy.

[0024] Working principle of the present invention:

[0025] When the temperature of the frozen soil is below 0°C, the volume of the frozen soil expands and squeezes the piezoelectric box and the energy storage tank. At this time, the first piston 12 and the second piston 19 move downward, the pressure in the first closed chamber 14 increases, and the multiple piezoelectric ceramic motors 16 in the antifreeze fluid are compressed to generate electricity, converting part of the pressure into electrical energy. The current is output by the wire. The pressure in the first closed chamber 14 is transmitted to the second closed chamber 15 through the first elastic diaphragm 13, and the compressed volume of the compressible gas in the second closed chamber 15 decreases; the pressure in the third closed chamber 111 increases, and the compressed volume of the compressible gas in the third closed chamber decreases; the pressure in the third closed chamber is transmitted to the fourth closed chamber 112 through the second elastic diaphragm 110;

[0026] When the pressures in the first and second enclosed chambers 14, 15 reach equilibrium, the piezoelectric ceramic motor 16 ceases generating power, completing the first stage of power generation. Because some of the pressure in the first enclosed chamber 14 is converted into electrical energy for output, the pressure in the fourth enclosed chamber 112 is now higher than that in the first enclosed chamber 14. This opens valve 17, which is controlled by a PLC switch located on the ground. The fourth enclosed chamber 112 communicates with the first enclosed chamber 14, and the pressure therein is transferred to the first enclosed chamber via the antifreeze fluid, causing the piezoelectric ceramic motor 16 to generate power again. When the pressures in the four enclosed chambers reach equilibrium, the piezoelectric ceramic motor 16 ceases generating power, completing the second stage of power generation. At this point, the power generation unit no longer outputs electrical energy.

[0027] The heat collection tank of the waste heat collection device 3 collects and stores waste heat from the thermal power plant. After power generation unit 1 completes its first and second phases of power generation, the waste heat collection device 3 is activated. A heat exchange pipe 4, originating from the hot water outlet of the heat collection tank, winds its way around each power generation unit 1 in an S-shaped pattern, heating the frozen soil surrounding each unit 1. After the hot water passes through the heat exchange pipe 4 and heats the frozen soil surrounding each unit 1, it is discharged from the other end of the heat exchange pipe 4. When the soil temperature reaches above 0°C, the frozen soil melts and contracts, dissipating the frozen soil expansion force exerted on the piezoelectric box and energy storage tank. The compressible gas in the second and third enclosed chambers 15 and 111 of each power generation unit 1 returns to its original volume, and the four enclosed chambers return to their initial states. The valves 17 are closed, and power generation ends. Multiple valves 17 are controlled by PLC switches located on the ground.

[0028] After that, the waste heat collection device 3 is turned off, and the soil temperature gradually decreases. When the soil temperature is lower than 0°C, the next power generation cycle begins.

[0029] The present invention uses permafrost expansion as the driving force and combines it with waste heat from thermal power plants to generate electricity. It is low-cost, clean and environmentally friendly, turning waste into treasure, and serves as an auxiliary means to solve the problem of electricity shortage in permafrost areas in winter.

[0030] Although this specification has provided a detailed description of the present invention using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made based on the present invention. Therefore, such modifications and improvements, which do not depart from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. An auxiliary integrated power generation system utilizing waste heat, characterized in that: The invention comprises a plurality of power generation units (1), a waste heat collection device (3) and a heat exchange pipe (4); the waste heat collection device (3) comprises a heat collection tank, and the heat collection tank is provided with a hot water outlet; the heat exchange pipe (4) starts from the hot water outlet of the heat collection tank and sequentially passes through each power generation unit in an S-shape; the plurality of power generation units (1) are connected in parallel; the power generation unit (1) comprises a piezoelectric box and an energy storage tank, and the piezoelectric box and the energy storage tank are arranged in frozen soil; The piezoelectric box comprises a first rectangular cylinder (11) and a first piston (12) both made of rigid materials and having an upper opening, wherein the upper end of the first piston (12) is provided with a pressure plate, and the lower end is provided with a horizontal first piston bottom surface; the lower end of the first piston (12) is provided in the first rectangular cylinder (11) and can move up and down along the axial direction of the first rectangular cylinder (11); a horizontal first elastic diaphragm (13) is further provided inside the first rectangular cylinder (11) between the bottom surface of the first piston and the bottom surface of the first rectangular cylinder (11); a first closed cavity (14) is formed between the bottom surface of the first piston and the first elastic diaphragm (13), and a second closed cavity (15) is formed between the first elastic diaphragm (13) and the bottom surface of the first rectangular cylinder (11); antifreeze is provided in the first closed cavity (14), and a plurality of piezoelectric ceramic motors (16) are provided in the antifreeze, and the positive and negative poles of the piezoelectric ceramic motors (16) are provided with wires extending out of the first closed cavity respectively; and compressible gas is provided in the second closed cavity (15); The waste heat collection device (3) is started, and hot water passes through the heat exchange pipe (4) to heat the frozen soil around the power generation unit (1), and is then discharged from the other end of the heat exchange pipe (4). The frozen soil melts and shrinks, and the frozen soil expansion force applied to the piezoelectric box and the energy storage tank disappears. The waste heat collection device (3) is closed, and the soil temperature gradually decreases.

2. The auxiliary integrated power generation system utilizing waste heat according to claim 1, characterized in that: A first pipe is provided on the side wall of the first rectangular cylinder (11) corresponding to the first closed cavity (14), a valve (17) is provided on the first pipe, and the first pipe is connected to one end of the valve (17). The energy storage tank comprises a second rectangular cylinder (18) and a second piston (19) both made of rigid materials and having an upper opening; a pressure plate is provided on the upper end of the second piston (19), and a horizontal second piston bottom surface is provided on the lower end; the lower end of the second piston (19) is provided in the second rectangular cylinder (18) and can move up and down along the axial direction of the second rectangular cylinder (18) A horizontal second elastic diaphragm (110) is further provided inside the second rectangular cylinder (18) between the bottom surface of the second piston and the bottom surface of the second rectangular cylinder (18); a third closed chamber (111) is formed between the bottom surface of the second piston and the second elastic diaphragm (110), and a fourth closed chamber (112) is formed between the second elastic diaphragm and the bottom surface of the second rectangular cylinder (18); the third closed chamber is provided with compressible gas, and the fourth closed chamber is provided with antifreeze liquid; the fourth closed chamber (112) is also provided with a second pipe; the second pipe is connected to the other end of the valve (17).

3. The auxiliary integrated power generation system utilizing waste heat according to claim 1 or 2, characterized in that: The rigid material is stainless steel.

4. The auxiliary integrated power generation system utilizing waste heat according to claim 1, characterized in that: It also includes a power storage station (2), and the conductors of the plurality of power generation units (1) are electrically connected to the power storage station (2).

Images