Modular small-temperature-difference waste heat recoverer

By using a modular design and a pull-out structure, the modular small temperature difference waste heat recovery unit solves the problems of poor adaptability and inconvenient maintenance of heat exchangers, and achieves flexible combination and efficient heat exchange.

CN223538146UActive Publication Date: 2025-11-11SHANDONG NAXIN NEW ENERGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202423094844.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-16
Publication Date
2025-11-11
Estimated Expiration
2034-12-16

AI Technical Summary

Technical Problem

The existing fixed structure of heat exchangers has poor adaptability, making it difficult to meet the ever-changing market demands, and is inconvenient to maintain and clean.

Method used

The modular small temperature difference waste heat recovery unit adopts a modular design and a pull-out structure. Through the quick connection and combination of the shell and heat exchange tubes, the heat tubes can be easily maintained and cleaned.

Benefits of technology

It enables flexible combination of heat exchangers to adapt to changing market demands, improves the convenience of maintenance and cleaning, and enhances heat exchange efficiency.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223538146U_ABST
    Figure CN223538146U_ABST
Patent Text Reader

Abstract

A modular small-temperature-difference waste heat recoverer comprises a shell, a heat exchange pipe, a connecting bolt, a sealing structure I and a sealing structure II which form a waste heat recovery unit, the shell is arranged to be of a circular-pipe-shaped structure, a tubular heat exchange cavity of a hollow structure is axially formed in the shell, shell flanges are arranged at the two ends of the shell, and the shell flanges are arranged in the tubular heat exchange cavity. The shell flange is arranged to be of an annular plate-shaped structure, a through hole with the diameter equal to that of the heat exchange cavity is formed in the center of an annular ring of the shell flange, and the center of the annular ring of the shell flange is concentric with the axis of the heat exchange cavity. A plurality of waste heat recovery units can be rapidly and organically connected and combined according to customer requirements, the variable market requirements are effectively met, the heat exchange pipe core adopts the drawing type structural design, and the heat pipe is convenient to maintain and clean.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery technology, and more specifically, it is a modular small temperature difference waste heat recovery device. Background Technology

[0002] Low-temperature waste heat recovery, especially small-temperature-difference waste heat recovery, is an important means of pursuing energy efficiency and environmental protection in the fields of energy-saving aquaculture, comprehensive seawater utilization, and industrial energy conservation. It is generally achieved by using heat exchangers, heat pipes, and other methods to recover low-temperature waste heat, reduce energy consumption, reduce waste heat emissions, and realize energy recovery and reuse, thereby bringing further economic benefits to enterprises.

[0003] Existing heat exchangers generally adopt a fixed structure and are manufactured by enterprises according to standardized specifications. As a result, they have poor adaptability to the market. There is an urgent need for a modular structure that can adapt to changing market demands and facilitate the maintenance and cleaning of heat pipes, thus solving this technical problem. Summary of the Invention

[0004] To address the aforementioned problems, this utility model provides a modular small temperature difference waste heat recovery unit. It employs a modular design, allowing for the rapid connection and combination of several shells and heat exchange tubes according to customer needs, effectively adapting to changing market demands. Furthermore, the heat exchange tube core utilizes a pull-out structure design, facilitating maintenance and cleaning of the heat tubes. The specific technical solution is as follows:

[0005] The modular small temperature difference waste heat recovery unit includes a shell, heat exchange tubes, connecting bolts, sealing structure I and sealing structure II, forming a waste heat recovery unit. The shell is configured as a circular tube structure, and the interior of the shell is configured as a hollow tubular heat exchange cavity. The shell is provided with shell flanges at both ends. The shell flanges are configured as annular plate structures. A through hole with a diameter equal to the diameter of the heat exchange cavity is opened at the center of the annulus of the shell flange. The center of the annulus of the shell flange is concentric with the axis of the heat exchange cavity.

[0006] The heat exchange chamber is equipped with a predetermined number of heat exchange tubes. Each heat exchange tube has a heat pipe flange at both ends. A spiral guide plate passes through the heat exchange tube between two heat pipe flanges. The heat pipe flanges are circular plate structures with a radial cross-section in the shape of a convex shaped plate. The outer diameter of the heat pipe flange is equal to the diameter of the heat exchange chamber, and the center of the heat pipe flange is concentric with the axis of the heat exchange chamber. A side section of the heat pipe flange with a predetermined length of convex shape contacts the shell flange, providing stable support for the heat exchange tubes within the heat exchange chamber.

[0007] A sealing end cap is provided on the outside of the heat pipe flange. The sealing end cap is a hemispherical shell. End cap flanges are provided around the sealing end cap. The sealing end cap and end cap flanges are integrally formed. The outer diameter of the end cap flange is equal to the outer diameter of the shell flange. The end cap flange is fixedly connected to the shell flange by connecting bolts. An annular sealing structure I is provided between the end cap flange and the shell flange. The center of the sealing structure I is concentric with the axis of the heat exchange chamber.

[0008] The sealing structure I includes a rubber strip groove and a sealing rubber strip. The rubber strip groove is a pair of symmetrically arranged hemispherical grooves, which are respectively provided on the contact surfaces of the shell flange and the end cover flange.

[0009] An annular sealing structure II is provided between the end cap flange and the heat pipe flange. The sealing structure II includes a rubber strip groove and a sealing rubber strip. The rubber strip groove is a pair of symmetrically arranged hemispherical grooves, which are respectively provided on the contact surfaces of the end cap flange and the heat pipe flange. Specifically, it is provided on the middle plane of the U-shaped structure of the heat pipe flange that connects and contacts the end cap flange.

[0010] The upper plane of the heat pipe flange convex structure and the sealing end cap form a medium cavity, and the lower planes of the two heat pipe flange convex structures together with the shell form a heat exchange cavity;

[0011] One end of the housing is provided with a water inlet, and the other end of the housing is provided with a water outlet on the side corresponding to the water inlet; a medium inlet connected to the medium cavity is provided on the sealing end cap at one end, and a medium outlet connected to the medium cavity is provided on the sealing end cap at the other end.

[0012] The sealing strip includes an elastic compression part and compression engaging parts disposed at both ends of the elastic compression part. The cross-section of the elastic compression part is rectangular, and the cross-section of the compression engaging part is hemispherical.

[0013] The beneficial effects of this utility model are: the technical solution of this application adopts a modular design of waste heat recovery unit, which can quickly and organically connect and combine several waste heat recovery units according to customer needs, effectively adapting to the ever-changing market demands. Moreover, the heat exchange tube core adopts a pull-out structure design, which facilitates the maintenance and cleaning of the heat tube. Attached Figure Description

[0014] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Appendix Figure 2 This is a structural schematic diagram of the flange of the housing of this utility model;

[0016] Appendix Figure 3 This is a schematic diagram of the structure of the sealing strip of this utility model;

[0017] Appendix Figure 4 This is a structural schematic diagram of the heat pipe flange of this utility model; in the attached drawing:

[0018] 1. Shell, 11. Inlet, 12. Shell flange, 13. Outlet, 2. Heat exchange tube, 21. Spiral guide plate, 22. Heat pipe flange, 3. Connecting bolt, 4. Sealing end cap, 41. Medium inlet, 42. Medium chamber, 43. End cap flange, 44. Medium outlet, 5. Sealing structure I, 51. Rubber strip groove, 52. Sealing rubber strip, 521. Compression engagement part, 522. Elastic compression part, 6. Hot water connection pipe, 7. Medium connection pipe, 8. Sealing structure II, 9. Heat exchange chamber. Detailed Implementation

[0019] Combined with appendix Figures 1-4 This utility model will be described in further detail to enable the public to better understand its implementation method. The specific implementation method of this utility model is as follows:

[0020] The modular small temperature difference waste heat recovery unit includes a shell 1, heat exchange tubes 2, connecting bolts 3, sealing structure I, and sealing structure II, forming a waste heat recovery unit. The shell 1 is a cylindrical tube structure, and the interior of the shell 1 is axially configured as a hollow tubular heat exchange cavity 9. Shell flanges 12 are provided at both ends of the shell 1. The shell flanges 12 are annular plate structures, and a through hole with a diameter equal to the diameter of the heat exchange cavity 9 is opened at the center of the annulus of the shell flange 12. The center of the annulus of the shell flange 12 is concentric with the axis of the heat exchange cavity 9; this allows the heat exchange tubes 2 to be pulled out from both ends of the shell 1 for convenient maintenance and installation.

[0021] The heat exchange chamber 9 is equipped with a predetermined number of heat exchange tubes 2, which can effectively recover the waste heat in the heat exchange chamber 9. Heat exchange tubes 2 are provided with heat pipe flanges 22 at both ends. A spiral guide plate 21 passes through the heat exchange tube 2 between two heat pipe flanges 22, which can effectively extend the heat exchange time and improve the heat exchange efficiency. The heat pipe flanges 22 are circular plate structures with a radial cross-section of a convex shape. The outer diameter of the heat pipe flanges 22 is equal to the diameter of the heat exchange chamber 9, and the center of the heat pipe flanges 22 is concentric with the axis of the heat exchange chamber 9. The lower annular section of the convex shape of the heat pipe flanges 22, with a predetermined length, abuts against the shell flange 12, supporting and stabilizing the position of the heat exchange tubes 2 in the heat exchange chamber 9. Together with the shell, they form the heat exchange chamber 9, creating a space for heat exchange and facilitating waste heat recovery.

[0022] A sealing end cap 4 is provided on the outside of the heat pipe flange 22. The sealing end cap 4 is a hemispherical shell structure. An end cap flange 43 is fixedly connected around the sealing end cap 4. The sealing end cap 4 and the end cap flange 43 are integrally formed. The outer diameter of the end cap flange 43 is equal to the outer diameter of the shell flange 12. The end cap flange 43 is fixedly connected to the shell flange 12 by connecting bolts 3. An annular sealing structure I5 ​​is provided between the end cap flange 43 and the shell flange 12. The center of the sealing structure I5 ​​is concentric with the axis of the heat exchange chamber 9.

[0023] The sealing structure I5 ​​includes a rubber strip groove 51 and a sealing strip 52. The rubber strip groove 51 is a pair of symmetrically arranged hemispherical grooves, which are respectively set on the contact surface connecting the shell flange 12 and the end cover flange 43. The size and shape of the sealing strip 52 match the size and shape of the rubber strip groove 51. The sealing strip 52 is fully engaged in the rubber strip groove 51, which plays a sealing role in the heat exchange chamber 9, prevents hot water leakage, and effectively improves the heat exchange efficiency.

[0024] An annular sealing structure II8 is provided between the end cap flange 43 and the heat pipe flange 22. The center of the sealing structure II8 is concentric with the axis of the heat exchange chamber 9. The sealing structure II8 includes a rubber strip groove 51 and a sealing rubber strip 52. The rubber strip groove 51 is a pair of symmetrically arranged hemispherical grooves, which are respectively provided on the contact surface connecting the end cap flange 43 and the heat pipe flange 22. Specifically, it is provided on the middle plane of the U-shaped structure of the heat pipe flange 22 that is in contact with the end cap flange 43.

[0025] The upper plane of the heat pipe flange 22 convex structure and the sealing end cap 43 form a medium cavity 42, and the lower planes of the two heat pipe flange 22 convex structures together with the inner wall of the shell 1 form a heat exchange cavity 9.

[0026] One end of the housing 1 is provided with a water inlet 11, and the other end of the housing 1 is provided with a water outlet 13 on the side corresponding to the water inlet 11; a medium inlet 41 communicating with the medium cavity 42 is provided on the sealing end cap 4 at one end, and a medium outlet 44 communicating with the medium cavity 42 is provided on the sealing end cap 4 at the other end.

[0027] The sealing strip 52 includes an elastic compression part 522 and compression engaging parts 521 disposed at both ends of the elastic compression part 522. The elastic compression part 522 is configured as a ring structure with a rectangular cross-section, and the compression engaging part 521 is configured as a ring structure with a hemispherical cross-section.

[0028] When the shell flange 12 is connected and fixed to the end cover flange 43, the heat pipe flange 22 and the end cover flange 43 are also engaged at the same time; the heat exchange tube 2 is fixed in the heat exchange chamber 9 through the heat pipe flanges 22 set at both ends of it, the elastic compression part 522 is compressed, and the sealing strip 52 is fully engaged in the strip groove 51, forming two independent sealed cavities: the heat exchange chamber 9 and the medium chamber 42; the low-temperature aquaculture tail water, seawater and industrial wastewater enter the heat exchange chamber 9 through the inlet 11, and the heat exchange medium enters the heat exchange tube 2 through the medium inlet 41 and the medium chamber 42. After heat exchange, the heat exchange medium that has gained heat flows out through the medium outlet 44, and the aquaculture tail water, seawater and industrial wastewater that have completed the heat transfer flows out through the outlet 13, completing the entire waste heat recovery process;

[0029] The modular small temperature difference waste heat recovery unit can combine several waste heat recovery units according to market demand. When several waste heat recovery units are needed, the outlet 13 of the shell 1 is connected to the inlet 11 of the adjacent shell 1 through the hot water connecting pipe 6, and the medium outlet 44 of the shell 1 is connected to the medium inlet 41 of the adjacent shell 1 through the medium connecting pipe 7; that is, the combination of a predetermined number of waste heat recovery units is completed to adapt to different market demands.

Claims

1. A modular small temperature difference waste heat recovery unit, comprising a shell (1), heat exchange tubes (2), connecting bolts (3), sealing structure I (5) and sealing structure II (8), constituting a waste heat recovery unit, characterized in that: The shell (1) is configured as a cylindrical tube structure, and the interior of the shell (1) is configured as a hollow tubular heat exchange cavity (9) in the axial direction. The shell (1) is provided with shell flanges (12) at both ends. The shell flanges (12) are configured as annular plate structures. A through hole with a diameter equal to that of the heat exchange cavity (9) is opened at the center of the annulus of the shell flange (12). The center of the annulus of the shell flange (12) is concentric with the axis of the heat exchange cavity (9). The heat exchange chamber (9) is provided with a predetermined number of heat exchange tubes (2). Heat exchange tubes (2) are provided with heat pipe flanges (22) at both ends. A spiral guide plate (21) is provided on the heat exchange tube (2) between two heat pipe flanges (22). The heat pipe flange (22) is set as a circular plate structure. The radial section of the heat pipe flange (22) is set as a convex structure. The outer diameter of the heat pipe flange (22) is equal to the diameter of the heat exchange chamber (9). The center of the heat pipe flange (22) is concentric with the axis of the heat exchange chamber (9). The heat pipe flange (22) is provided with a lower annular surface section of a convex structure of a predetermined length that abuts against the shell flange (12). A sealing end cap (4) is provided on the outside of the heat pipe flange (22). The sealing end cap (4) is a hemispherical shell structure. An end cap flange (43) is fixedly connected around the sealing end cap (4). The sealing end cap (4) and the end cap flange (43) are integrally formed. The outer diameter of the end cap flange (43) is equal to the outer diameter of the shell flange (12). The end cap flange (43) is fixedly connected to the shell flange (12) by connecting bolts (3). An annular sealing structure I (5) is provided between the end cover flange (43) and the shell flange (12), and the center of the sealing structure I (5) is concentric with the axis of the heat exchange chamber (9). An annular sealing structure II (8) is provided between the end cover flange (43) and the heat pipe flange (22), and the center of the sealing structure II (8) is concentric with the axis of the heat exchange chamber (9).

2. The modular small temperature difference waste heat recovery unit according to claim 1, characterized in that, The sealing structure I (5) includes a rubber strip groove (51) and a sealing strip (52). The rubber strip groove (51) is a pair of symmetrically arranged hemispherical grooves, which are respectively arranged on the contact surface of the housing flange (12) and the end cover flange (43). The size and shape of the sealing strip (52) match the size and shape of the rubber strip groove (51). The sealing strip (52) is fully engaged in the rubber strip groove (51).

3. The modular small temperature difference waste heat recovery unit according to claim 1, characterized in that, The sealing structure II (8) includes a rubber strip groove (51) and a sealing rubber strip (52). The rubber strip groove (51) is a pair of symmetrically arranged hemispherical grooves, which are respectively arranged on the contact surface of the end cover flange (43) and the heat pipe flange (22); specifically, it is arranged on the middle plane of the convex structure of the heat pipe flange (22) that is in contact with the end cover flange (43).

4. The modular small temperature difference waste heat recovery unit according to claim 1, characterized in that, The upper plane of the heat pipe flange (22) convex structure and the sealing end cap (4) form a medium cavity (42), and the lower plane of the two heat pipe flanges (22) convex structure together with the inner wall of the shell (1) form a heat exchange cavity (9).

5. The modular small temperature difference waste heat recovery unit according to claim 1, characterized in that, One end of the housing (1) is provided with a water inlet (11), and the other end of the housing (1) is provided with a water outlet (13) on the side corresponding to the water inlet (11); a medium inlet (41) connected to the medium cavity (42) is provided on the sealing end cap (4) at one end, and a medium outlet (44) connected to the medium cavity (42) is provided on the sealing end cap (4) at the other end.

6. The modular small temperature difference waste heat recovery unit according to claim 2 or 3, characterized in that, The sealing strip (52) includes an elastic compression part (522) and compression engaging parts (521) disposed at both ends of the elastic compression part (522). The elastic compression part (522) is configured as a circular ring structure with a rectangular cross-section, and the compression engaging part (521) is configured as a circular ring structure with a hemispherical cross-section.

7. The modular small temperature difference waste heat recovery unit according to claim 1, characterized in that, When the shell flange (12) is connected and fixed to the end cover flange (43), the heat pipe flange (22) and the end cover flange (43) are also engaged at the same time; the heat exchange pipe (2) is fixed in the heat exchange chamber (9) through the heat pipe flanges (22) set at both ends of it, and the sealing strip (52) is fully engaged in the strip groove (51), forming two independent sealed cavities: the heat exchange chamber (9) and the medium chamber (42).

8. The modular small temperature difference waste heat recovery unit according to claim 1, characterized in that, When several waste heat recovery units are combined, the outlet (13) of the shell (1) is connected to the inlet (11) of the adjacent shell (1) through the hot water connecting pipe (6), and the medium outlet (44) of the shell (1) is connected to the medium inlet (41) of the adjacent shell (1) through the medium connecting pipe (7); thus completing the combination of the predetermined number of waste heat recovery units.