Spiral disturbance heat exchanger for waste heat recovery

Abstract

The utility model discloses a kind of waste heat recovery screw flow disturbance type heat exchangers, including heat exchange shell, the two sides of heat exchange shell below are respectively provided with hot medium inlet and cold medium outlet, the two sides of heat exchange shell top are respectively provided with hot medium outlet and cold medium inlet, hot medium inlet and hot medium outlet and cold medium inlet and cold medium outlet between respectively opposite setting, the inside of heat exchange shell is provided with several heat exchange pipes that communicate hot medium inlet and hot medium outlet and carry out heat exchange;The outer wall of the heat exchange pipe is provided with first screw flow disturbance piece for the flow disturbance of the cold medium outside heat exchange pipe, the inside of heat exchange pipe is provided with second screw flow disturbance piece for the flow disturbance of the hot medium in heat exchange pipe.The utility model is by being provided with screw flow disturbance piece in the inside and outside of heat exchange pipe, respectively flow disturbance to cold and hot medium, to reduce the flow velocity of cold and hot medium, prolong the time that cold and hot medium remain in heat exchanger, improve the efficiency of heat exchange.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and more specifically to a spiral turbulence heat exchanger for waste heat recovery. Background Technology

[0002] In the industrial sector, approximately 50% of energy is lost as waste heat. The efficiency of waste heat recovery from high-temperature media, such as flue gas and raw coal gas, directly impacts overall energy efficiency. In traditional shell-and-tube heat exchangers, the hot medium flows directly through the heat exchange tubes, conducting heat through the tube walls and exchanging heat with the cold medium outside the tubes. This heat exchange method results in direct flow of both hot and cold media inside the heat exchanger, leading to excessively high flow rates and short contact times, thus reducing heat exchange efficiency.

[0003] Especially in waste heat recovery, the most effective way to improve waste heat utilization is to increase the efficiency of heat exchangers. Current practice typically involves connecting multiple heat exchangers in series to extend the contact time between the hot and cold media. While this method achieves effective heat exchange, connecting multiple heat exchangers in series occupies a significant amount of space and increases heat exchange costs. Therefore, there is an urgent need to develop a heat exchanger that is both highly efficient and cost-effective. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a spiral turbulence heat exchanger for waste heat recovery, which improves heat exchange efficiency and ensures heat exchange effect.

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

[0006] A spiral turbulence heat exchanger for waste heat recovery includes a heat exchange shell. A hot medium inlet and a cold medium outlet are respectively arranged on both sides below the heat exchange shell, and a hot medium outlet and a cold medium inlet are respectively arranged on both sides above the heat exchange shell. The hot medium inlets and outlets, as well as the cold medium inlets and outlets, are respectively arranged opposite to each other. A plurality of heat exchange tubes are arranged inside the heat exchange shell, connecting the hot medium inlets and outlets for heat exchange. The outer wall of each heat exchange tube is provided with a first spiral turbulence vane for turbulenting the cold medium outside the heat exchange tube, and the inside of each heat exchange tube is provided with a second spiral turbulence vane for turbulenting the hot medium inside the heat exchange tube.

[0007] To further optimize the technical solution, a first main pipe is provided at the bottom of the heat exchange shell, which is connected to the inlet of the heat medium, and the bottom end of the heat exchange tube is vertically connected to the first main pipe.

[0008] To further optimize the technical solution, a second main pipe is provided at the top of the heat exchange shell, which is connected to the outlet of the heat medium, and the top end of the heat exchange tube is vertically connected to the second main pipe.

[0009] To further optimize the technical solution, a core tube is installed inside the heat exchange tube via connecting plates at both ends, and a second spiral baffle is arranged around the core tube.

[0010] To further optimize the technical solution, the connecting plate is a strip-shaped connecting plate, and a heat medium flow port for the inlet and outlet of the heat medium is provided between the connecting plate and the heat exchange tube.

[0011] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0012] This utility model provides a spiral turbulence heat exchanger for waste heat recovery. By setting spiral turbulence plates on both the inner and outer sides of the heat exchange tube, the flow of the hot and cold media is turbulent, thereby reducing the flow velocity of the hot and cold media, prolonging the residence time of the hot and cold media in the heat exchanger, improving the efficiency of heat exchange, thus ensuring the heat exchange effect, and reducing the heat exchange cost. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the heat exchange tube of this utility model;

[0015] Figure 3 This is a schematic diagram of the end structure of the heat exchange tube of this utility model.

[0016] The components are: 1. heat exchange shell, 2. hot medium inlet, 3. hot medium outlet, 4. cold medium inlet, 5. cold medium outlet, 6. first main pipe, 7. second main pipe, 8. heat exchange tube, 9. first spiral baffle, 10. core tube, 11. second spiral baffle, 12. connecting plate, and 13. hot medium flow port. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] A spiral turbulence heat exchanger for waste heat recovery, combined with Figures 1 to 3 As shown, the device includes a heat exchange shell 1. A hot medium inlet 2 and a cold medium outlet 5 are respectively provided on the two sides below the heat exchange shell 1. A hot medium outlet 3 and a cold medium inlet 4 are respectively provided on the two sides above the heat exchange shell 1. The hot medium inlet 2 and the hot medium outlet 3, as well as the cold medium inlet 4 and the cold medium outlet 5, are respectively arranged opposite to each other. A plurality of heat exchange tubes 8 are provided inside the heat exchange shell 1. The two ends of the heat exchange tubes 8 are respectively connected to the hot medium inlet 2 and the hot medium outlet 3 to realize the heat exchange between the hot medium and the cold medium.

[0019] The bottom of the heat exchange shell 1 is provided with a first main pipe 6 connected to the heat medium inlet 2. The bottom end of the heat exchange tube 8 is perpendicularly connected to the first main pipe 6. The top of the heat exchange shell 1 is provided with a second main pipe 7 connected to the heat medium outlet 3. The top end of the heat exchange tube 8 is perpendicularly connected to the second main pipe 7. The heat medium enters the heat exchanger first into the first main pipe, and then enters each heat exchange tube through the first main pipe. After heat exchange, the heat medium flows out through the second main pipe and then out through the main heat medium outlet, ensuring that the heat medium can enter each heat exchange tube evenly for heat exchange, thus improving the heat exchange effect. Furthermore, the heat medium inlet and outlet are arranged opposite each other, which can effectively prevent the heat medium from flowing directly out of the heat exchange tube at the inlet, ensuring the uniformity of heat exchange.

[0020] A first spiral baffle 9 is provided on the outer wall of the heat exchange tube 8 to turbulent the cold medium outside the heat exchange tube, and a second spiral baffle 11 is provided inside the heat exchange tube 8 to turbulent the hot medium inside the heat exchange tube. Through the first spiral baffle and the second spiral baffle, the cold medium and the hot medium are turbulently turbulent, reducing the flow velocity of the medium, prolonging the residence time of the cold and hot medium in the heat exchange shell, and improving the heat exchange effect.

[0021] A core tube 10 is installed inside the heat exchange tube 8 through connecting plates 12 at both ends. A second spiral baffle 11 is arranged around the core tube 10. The connecting plate 12 is a strip-shaped connecting plate. A heat medium flow port 13 is provided between the connecting plate 12 and the heat exchange tube 8 support for the heat medium to enter and exit the heat exchange tube. The heat medium enters the heat exchange tube from the heat medium flow port, is turbulent by the second spiral baffle to reduce the flow velocity of the heat medium, and finally flows out from the heat medium flow port at the other end.

[0022] In this invention, during heat exchange, the hot medium enters from the bottom hot medium inlet and flows out from the top hot medium outlet, while the cold medium enters from the top cold medium inlet and flows out from the bottom cold medium outlet. The hot and cold media are turbulent within the heat exchanger by the first and second spiral turbulence plates, respectively, which reduces the flow velocity of the hot and cold media, prolongs the residence time of the hot and cold media in the heat exchanger, improves the efficiency of heat exchange, and thus ensures the heat exchange effect.

Claims

1. A spiral turbulence heat exchanger for waste heat recovery, characterized in that: The device includes a heat exchange shell (1), with a hot medium inlet (2) and a cold medium outlet (5) respectively located on both sides below the heat exchange shell (1), and a hot medium outlet (3) and a cold medium inlet (4) respectively located on both sides above the heat exchange shell (1). The hot medium inlet (2) and the hot medium outlet (3), as well as the cold medium inlet (4) and the cold medium outlet (5), are respectively arranged opposite to each other. The heat exchange shell (1) is provided with a number of heat exchange tubes (8) that connect the hot medium inlet (2) and the hot medium outlet (3) for heat exchange. The outer wall of the heat exchange tube (8) is provided with a first spiral baffle (9) for turbulence of the cold medium outside the heat exchange tube, and the inside of the heat exchange tube (8) is provided with a second spiral baffle (11) for turbulence of the hot medium inside the heat exchange tube.

2. The spiral turbulence heat exchanger for waste heat recovery according to claim 1, characterized in that: The bottom of the heat exchange shell (1) is provided with a first main pipe (6) connected to the heat medium inlet (2), and the bottom end of the heat exchange tube (8) is vertically connected to the first main pipe (6).

3. A spiral turbulence heat exchanger for waste heat recovery according to claim 1, characterized in that: The top of the heat exchange shell (1) is provided with a second main pipe (7) connected to the heat medium outlet (3), and the top of the heat exchange tube (8) is vertically connected to the second main pipe (7).

4. A spiral turbulence heat exchanger for waste heat recovery according to claim 1, characterized in that: The heat exchange tube (8) is provided with a core tube (10) through connecting plates (12) at both ends, and a second spiral baffle (11) is arranged around the core tube (10).

5. A spiral turbulence heat exchanger for waste heat recovery according to claim 4, characterized in that: The connecting plate (12) is a strip-shaped connecting plate, and a heat medium flow port (13) for the heat medium to enter and exit is provided between the connecting plate (12) and the heat exchange tube (8).

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