High-low level energy conversion device for waste heat utilization

Abstract

The utility model relates to the technical field of waste heat utilization, and discloses a high and low level energy conversion device for waste heat utilization, which comprises a device frame, a working medium storage box, a medium storage box and a preheating mechanism, and a conversion unit is arranged on the device frame. A conversion unit comprising a working medium heat exchange mechanism, a compressor, a medium heat exchange mechanism and an expansion valve is arranged on a device frame, and through cooperation of the working medium heat exchange mechanism, the compressor, the medium heat exchange mechanism and the expansion valve, heat energy transfer of fluid waste, high-low-level energy conversion of heat energy and heat energy recycling are conducted.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization technology, specifically a high-low energy conversion device for waste heat utilization. Background Technology

[0002] Currently, industrial production generates a large amount of wastewater and waste gas, which often carry residual heat. High-heat wastewater and waste gas can be recovered and utilized through recovery devices. However, some low-temperature wastewater and waste gas are difficult to recover and utilize directly, and will be discharged for treatment, resulting in energy waste and low energy utilization rate.

[0003] Therefore, we propose a high-low energy conversion device for waste heat utilization to solve the problems mentioned above. Utility Model Content

[0004] The purpose of this invention is to solve the problem that a large amount of wastewater and waste gas are generated in industrial production. These wastewater and waste gas often carry residual heat. The invention aims to recover and utilize the energy of high-heat wastewater and waste gas through a recovery device. However, some wastewater and waste gas with lower temperature are difficult to recover and utilize directly and will be discharged for treatment, resulting in energy waste and low energy utilization.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-low energy conversion device for waste heat utilization, comprising: a device frame, on which a conversion unit is installed;

[0006] The working medium storage tank is installed on the device frame and is used to store the working medium.

[0007] The media storage tank, mounted on the device frame, is used to store the media;

[0008] The preheating mechanism, mounted on the device frame, is used to preheat the medium through fluid waste;

[0009] The conversion unit includes a working fluid heat exchange mechanism, a compressor, a medium heat exchange mechanism, and an expansion valve. The working fluid heat exchange mechanism is used to transfer heat energy between the fluid waste and the working fluid.

[0010] The compressor is used to compress the working fluid, increasing its pressure and temperature;

[0011] The medium heat exchange mechanism is used to reheat the preheated medium.

[0012] The expansion valve is used for throttling and pressure reduction, regulating the flow rate of the working fluid, and controlling the temperature.

[0013] Furthermore, a first waste pipe is provided on the preheating mechanism, a second waste pipe is provided between the preheating mechanism and the working fluid heat exchange mechanism, and a third waste pipe is provided on the working fluid heat exchange mechanism;

[0014] A first working fluid pipe is provided between the working fluid storage tank and the working fluid heat exchange mechanism; a second working fluid pipe is provided between the working fluid heat exchange mechanism and the compressor; a third working fluid pipe is provided between the compressor and the medium heat exchange mechanism; a fourth working fluid pipe is provided between the medium heat exchange mechanism and the expansion valve; and a fifth working fluid pipe is provided between the expansion valve and the working fluid storage tank.

[0015] A first medium pipe is provided between the medium storage tank and the preheating mechanism, a second medium pipe is provided between the preheating mechanism and the medium heat exchange mechanism, and a third medium pipe is provided on the medium heat exchange mechanism.

[0016] Furthermore, the device frame is equipped with a filter box connected to the first waste pipe, and the filter box contains a filter plate.

[0017] Furthermore, the preheating mechanism includes a preheating box, in which a plurality of uniformly distributed first heat exchange tubes are arranged. One end of the first heat exchange tube is connected to a first waste pipe, and the other end of the first heat exchange tube is connected to a second waste pipe. The first heat exchange tube is configured with a spiral structure.

[0018] Furthermore, the working fluid heat exchange mechanism includes a working fluid heat exchange box, a heat exchange plate is provided inside the working fluid heat exchange box, a plurality of evenly distributed branch plates are connected to the surface of the heat exchange plate, heat exchange channels are opened in the heat exchange plate and the branch plates, and the second waste pipe and the third waste pipe are both connected to the heat exchange channels.

[0019] Furthermore, the medium heat exchange mechanism includes a medium heat exchange box, in which partition plates are symmetrically arranged. The medium heat exchange box is divided into a heat exchange chamber and two centralized chambers by the partition plates. Multiple uniformly distributed second heat exchange tubes are arranged in the heat exchange chamber. The two centralized chambers are connected by the second heat exchange tubes. The second heat exchange tubes are configured with a multi-segment bent structure and multiple uniformly distributed heat exchange fins are arranged on the second heat exchange tubes. The third working fluid tube and the fourth working fluid tube are both connected to the heat exchange chamber. The second medium tube and the third medium tube are both connected to the centralized chamber.

[0020] Furthermore, the device frame is provided with a first pump body connected to the second waste pipe, a second pump body connected to the second medium pipe, and a third pump body connected to the fifth working fluid pipe.

[0021] The beneficial effects of this utility model are as follows: by setting a conversion unit on the device frame, including a working fluid heat exchange mechanism, a compressor, a medium heat exchange mechanism and an expansion valve, the heat energy transfer of fluid waste, as well as the conversion of high and low energy and the recovery and utilization of heat energy are carried out through the cooperation of the working fluid heat exchange mechanism, the compressor, the medium heat exchange mechanism and the expansion valve. Attached Figure Description

[0022] Figure 1 This is a first structural schematic diagram of the high-low energy conversion device for waste heat utilization according to this utility model;

[0023] Figure 2 This is a schematic diagram of the second structure of the high-low energy conversion device for waste heat utilization of this utility model;

[0024] Figure 3 This is a schematic diagram of the third structure of the high-low energy conversion device for waste heat utilization of this utility model;

[0025] Figure 4 This is a side view of the high-low energy conversion device for waste heat utilization according to this utility model.

[0026] Figure 5 This is a cross-sectional structural schematic diagram of the high-low energy conversion device for waste heat utilization according to this utility model;

[0027] Figure 6 This is a schematic diagram of the second heat exchange tube structure of the high-low energy conversion device for waste heat utilization of this utility model.

[0028] The names corresponding to each mark in the diagram:

[0029] 1. Unit frame; 2. Working fluid storage tank; 3. Medium storage tank; 4. Preheating mechanism; 41. Preheating box; 42. First heat exchange tube; 5. Working fluid heat exchange mechanism; 51. Working fluid heat exchange box; 52. Heat exchange plate; 53. Branch plate; 6. Compressor; 7. Medium heat exchange mechanism; 71. Medium heat exchange box; 72. Divider plate; 73. Heat exchange chamber; 74. Centralized chamber; 75. Second heat exchange tube; 76. Heat exchange fins; 8. Expansion valve; 9. First waste 10. Second waste pipe; 11. Third waste pipe; 12. First working medium pipe; 13. Second working medium pipe; 14. Third working medium pipe; 15. Fourth working medium pipe; 16. Fifth working medium pipe; 17. First medium pipe; 18. Second medium pipe; 19. Third medium pipe; 20. Filter box; 21. Filter plate; 22. First pump body; 23. Second pump body; 24. Third pump body; 25. First solenoid valve; 26. Second solenoid valve. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0031] Embodiments of this utility model:

[0032] like Figures 1-5 As shown, this utility model provides a high-low energy conversion device for waste heat utilization, including a device frame 1, a working fluid storage tank 2, a medium storage tank 3, and a preheating mechanism 4. The device frame 1 is equipped with a conversion unit, the working fluid storage tank 2 is installed on the device frame 1 for storing the working fluid, which is carbon dioxide, and the medium storage tank 3 is installed on the device frame 1 for storing the medium. The medium storage tank 3 is equipped with an inlet pipe, and the medium is water.

[0033] like Figures 1-6As shown, the converter unit includes a working fluid heat exchange mechanism 5, a compressor 6, a medium heat exchange mechanism 7, and an expansion valve 8. The working fluid heat exchange mechanism 5 is used for heat transfer between the fluid waste and the working fluid, wherein the fluid waste is waste gas or wastewater. A first waste pipe 9 is provided on the preheating mechanism 4, which can guide the fluid waste into the preheating mechanism 4 for treatment, thereby reducing the load on the converter unit. A second waste pipe 10 is provided between the preheating mechanism 4 and the working fluid heat exchange mechanism 5. A first pump body 22 connected to the second waste pipe 10 is provided on the device frame 1, which can guide the fluid waste into the working fluid heat exchange mechanism 5 for treatment. A third waste pipe 11 is provided on the working fluid heat exchange mechanism 5, through which the treated fluid waste is discharged. Structure 5 includes a working fluid heat exchange box 51, inside which a heat exchange plate 52 is installed. Multiple evenly distributed branch plates 53 are connected to the surface of the heat exchange plate 52. Heat exchange channels are formed within the heat exchange plate 52 and the branch plates 53. A second waste pipe 10 and a third waste pipe 11 are both connected to the heat exchange channels, allowing fluid waste to flow within them. A compressor 6 is used to compress the working fluid, increasing its pressure and temperature. A medium heat exchange mechanism 7 is used to reheat the preheated medium. An expansion valve 8 is used to throttle and reduce pressure, regulate the working fluid flow rate, and control the temperature. A first working fluid pipe 12 is installed between the working fluid storage tank 2 and the working fluid heat exchange mechanism 5. A first solenoid valve 25 is installed on the first working fluid pipe 12 near the working fluid storage tank 2, allowing the first working fluid to pass through... Pipe 12 introduces the carbon dioxide working medium from the working medium storage tank 2 into the working medium heat exchange box 51 of the working medium heat exchange mechanism 5 for heat exchange with the fluid waste. A second working medium pipe 13 is provided between the working medium heat exchange mechanism 5 and the compressor 6. After heat exchange, the carbon dioxide working medium enters the compressor 6 through the second working medium pipe 13 for heating and pressurization. A third working medium pipe 14 is provided between the compressor 6 and the medium heat exchange mechanism 7. The high-temperature and high-pressure carbon dioxide working medium processed by the compressor 6 enters the medium heat exchange mechanism 7 through the third working medium pipe 14 for heat exchange. A fourth working medium pipe 15 is provided between the medium heat exchange mechanism 7 and the expansion valve 8. The carbon dioxide working medium is depressurized and cooled through the expansion valve 8. A fifth working medium pipe 16 is provided between the expansion valve 8 and the working medium storage tank 2 for depressurization. The cooled carbon dioxide working fluid enters the working fluid storage tank 2 through the fifth working fluid pipe 16 for storage and circulation. The device frame 1 is equipped with a third pump body 24 connected to the fifth working fluid pipe 16. The medium heat exchange mechanism 7 includes a medium heat exchange box 71. A partition plate 72 is symmetrically arranged inside the medium heat exchange box 71. The medium heat exchange box 71 is divided into a heat exchange chamber 73 and two centralized chambers 74 by the partition plate 72. A plurality of uniformly distributed second heat exchange tubes 75 are arranged inside the heat exchange chamber 73. The two centralized chambers 74 are connected through the second heat exchange tubes 75. The second heat exchange tubes 75 are configured with a multi-section bent structure and a plurality of uniformly distributed heat exchange fins 76 are arranged on the second heat exchange tubes 75. The third working fluid pipe 14 and the fourth working fluid pipe 15 are both connected to the heat exchange chamber 73.

[0034] like Figures 1-5 As shown, a first medium pipe 17 is provided between the medium storage tank 3 and the preheating mechanism 4. A second solenoid valve 26 is provided near the medium storage tank 3 on the first medium pipe 17. A second medium pipe 18 is provided between the preheating mechanism 4 and the medium heat exchange mechanism 7. A second pump body 23 connected to the second medium pipe 18 is provided on the device frame 1. A third medium pipe 19 is provided on the medium heat exchange mechanism 7. Both the second medium pipe 18 and the third medium pipe 19 are connected to the central cavity 74 of the medium heat exchange box 71. The preheating mechanism 4 is provided on the device frame 1 and is used to preheat the medium through fluid waste. The preheating mechanism 4 includes a preheating box 41, and multiple uniformly distributed... The first heat exchange tube 42 is connected to the first waste tube 9 at one end and to the second waste tube 10 at the other end. The first heat exchange tube 42 is configured as a spiral structure. Water is introduced from the medium storage tank 3 into the preheating tank 41 through the first medium tube 17 to preheat and exchange heat with the fluid waste flowing in the first heat exchange tube 42. Then, through the cooperation of the second medium tube 18 and the second pump body 23, the water is introduced into the central cavity 74 and the second heat exchange tube 75 of the medium heat exchange tank 71 to exchange heat with the carbon dioxide working medium in the heat exchange cavity 73 of the medium heat exchange tank 71. The water after heat exchange is discharged through the third medium tube 19 for use.

[0035] like Figures 1-5 As shown, the device frame 1 is equipped with a filter box 20 connected to the first waste pipe 9. The filter box 20 is equipped with a filter plate 21, which can filter fluid waste and remove impurities.

Claims

1. A high-low energy conversion device for utilizing waste heat, characterized in that, include: A device frame (1) is provided with a conversion unit; The working medium storage tank (2) is set on the device frame (1) and is used to store the working medium; The medium storage tank (3) is installed on the device frame (1) and is used to store the medium; A preheating mechanism (4) is installed on the device frame (1) and is used to preheat the medium through fluid waste; The conversion unit includes a working fluid heat exchange mechanism (5), a compressor (6), a medium heat exchange mechanism (7), and an expansion valve (8). The working fluid heat exchange mechanism (5) is used to transfer heat energy between the fluid waste and the working fluid. The compressor (6) is used to compress the working fluid and increase its pressure and temperature; The medium heat exchange mechanism (7) is used to perform secondary heating on the preheated medium; The expansion valve (8) is used for throttling and pressure reduction, regulating the flow rate of the working fluid, and controlling the temperature.

2. The high-low energy conversion device for waste heat utilization according to claim 1, characterized in that: The preheating mechanism (4) is provided with a first waste pipe (9), the preheating mechanism (4) and the working fluid heat exchange mechanism (5) are provided with a second waste pipe (10), and the working fluid heat exchange mechanism (5) is provided with a third waste pipe (11). A first working fluid pipe (12) is provided between the working fluid storage tank (2) and the working fluid heat exchange mechanism (5), a second working fluid pipe (13) is provided between the working fluid heat exchange mechanism (5) and the compressor (6), a third working fluid pipe (14) is provided between the compressor (6) and the medium heat exchange mechanism (7), a fourth working fluid pipe (15) is provided between the medium heat exchange mechanism (7) and the expansion valve (8), and a fifth working fluid pipe (16) is provided between the expansion valve (8) and the working fluid storage tank (2). A first medium pipe (17) is provided between the medium storage tank (3) and the preheating mechanism (4), a second medium pipe (18) is provided between the preheating mechanism (4) and the medium heat exchange mechanism (7), and a third medium pipe (19) is provided on the medium heat exchange mechanism (7).

3. The high-low energy conversion device for waste heat utilization according to claim 2, characterized in that: The device frame (1) is provided with a filter box (20) connected to the first waste pipe (9), and a filter plate (21) is provided inside the filter box (20).

4. The high-low energy conversion device for waste heat utilization according to claim 2, characterized in that: The preheating mechanism (4) includes a preheating box (41), in which a plurality of uniformly distributed first heat exchange tubes (42) are provided. One end of the first heat exchange tube (42) is connected to the first waste tube (9), and the other end of the first heat exchange tube (42) is connected to the second waste tube (10). The first heat exchange tube (42) is configured as a spiral structure.

5. A high-low energy conversion device for waste heat utilization according to claim 2, characterized in that: The working fluid heat exchange mechanism (5) includes a working fluid heat exchange box (51), a heat exchange plate (52) is provided inside the working fluid heat exchange box (51), and a plurality of evenly distributed branch plates (53) are connected to the surface of the heat exchange plate (52). Heat exchange channels are opened in the heat exchange plate (52) and the branch plates (53), and the second waste pipe (10) and the third waste pipe (11) are both connected to the heat exchange channels.

6. The high-low energy conversion device for waste heat utilization according to claim 2, characterized in that: The medium heat exchange mechanism (7) includes a medium heat exchange box (71). A partition plate (72) is symmetrically arranged inside the medium heat exchange box (71). The medium heat exchange box (71) is divided into a heat exchange chamber (73) and two centralized chambers (74) by the partition plate (72). A plurality of uniformly distributed second heat exchange tubes (75) are arranged inside the heat exchange chamber (73). The two centralized chambers (74) are connected by the second heat exchange tubes (75). The second heat exchange tubes (75) are configured with a multi-segment bent structure, and a plurality of uniformly distributed heat exchange fins (76) are arranged on the second heat exchange tubes (75). The third working fluid tube (14) and the fourth working fluid tube (15) are both connected to the heat exchange chamber (73). The second medium tube (18) and the third medium tube (19) are both connected to the centralized chamber (74).

7. The high-low energy conversion device for waste heat utilization according to claim 1, characterized in that: The device frame (1) is provided with a first pump body (22) connected to the second waste pipe (10), the device frame (1) is provided with a second pump body (23) connected to the second medium pipe (18), and the device frame (1) is provided with a third pump body (24) connected to the fifth working medium pipe (16).

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