Compressed air waste heat recoverer

Abstract

The invention discloses a compressed air waste heat recoverer which comprises a shell, an end cover, a spiral heat exchange pipe fitting, a guide cylinder, a guide plate, a supporting piece and a monitoring interface assembly, and a compressed air inlet, a compressed air outlet, a cooling medium inlet and a cooling medium outlet are formed in the side wall of the shell; the end covers are arranged at the two axial ends of the shell part and connected with the shell through flange structures. The spiral heat exchange pipe fitting is arranged in an inner cavity of the shell, and the two ends of the spiral heat exchange pipe fitting communicate with the compressed air inlet and the compressed air outlet in a sealed mode correspondingly. The guide cylinder is arranged on the outer side of the spiral heat exchange pipe fitting in a sleeving manner, and the guide cylinder and the shell are coaxially arranged; and the guide plate is arranged between the inner wall of the shell and the outer wall of the guide cylinder. Through cooperation of the spiral heat exchange pipe fitting, the flow guide cylinder and the flow guide plate, deep heat exchange of fluid is achieved, and efficiency is improved; and the equipment is accurately controlled to guarantee stable operation through entrance and exit monitoring.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery, and in particular to a compressed air waste heat recovery device. Background Technology

[0002] Compressed air waste heat recovery units belong to the field of industrial heat recovery and energy-saving equipment. They are mainly used in industries such as chemical engineering, machinery manufacturing, and power generation that require large amounts of compressed air. They are used to recover the waste heat generated during the compressed air preparation process and convert it into usable heat energy to reduce energy loss in industrial systems. They are important equipment for improving overall energy efficiency.

[0003] Existing compressed air heat exchangers generally suffer from limited heat exchange efficiency. To improve this problem, common solutions include increasing the number of straight-tube heat exchange components or adjusting the angle of a single flow guide component. These attempts aim to improve the effect by expanding the heat exchange area or changing the local fluid flow direction. However, the straight-tube structure causes the fluid to always flow along a single path. Even if the flow guide component is adjusted, it can only change the local fluid direction and cannot allow the compressed air and cooling medium to form a cross-flow and turbulence-combined contact mode. As a result, the fluid contact is still insufficient, and the improvement in heat exchange efficiency is limited.

[0004] Meanwhile, existing equipment commonly monitors operational status by setting up a single monitoring point at a key inlet and outlet, but this does not cover all inlets and outlets of compressed air and cooling medium. As a result, it is impossible to obtain complete heat exchange process parameters, making it difficult to accurately control the equipment's operational status. Incomplete monitoring can still easily lead to abnormalities, resulting in insufficient equipment operational stability. Therefore, a compressed air waste heat recovery device is proposed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a compressed air waste heat recovery device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a compressed air waste heat recovery device, comprising:

[0007] The package includes an outer shell, end caps, spiral heat exchange tubes, a guide tube, a guide plate, a support component, and a monitoring interface assembly. The outer shell is a cylindrical hollow structure, and its side wall is provided with a compressed air inlet, a compressed air outlet, a cooling medium inlet, and a cooling medium outlet.

[0008] The end caps are located at both axial ends of the outer shell, and the tenon and groove structure of the end caps is detachably connected to the outer shell through a flange structure; the spiral heat exchange tube is located in the internal cavity of the outer shell, and the two ends of the spiral heat exchange tube are respectively sealed and connected to the compressed air inlet and the compressed air outlet.

[0009] The guide tube is sleeved on the outside of the spiral heat exchange tube, the guide tube is coaxially arranged with the outer shell, and the side wall of the guide tube is provided with plum blossom-shaped perforations.

[0010] The guide plate is disposed between the inner wall of the outer shell and the outer wall of the guide cylinder, and the guide plate is fixedly connected to the inner wall of the outer shell;

[0011] The support member is disposed on the inner wall of the outer shell, and the support member is fixedly connected to the spiral heat exchange tube;

[0012] The monitoring interface component includes a first monitoring interface and a second monitoring interface. The first monitoring interface and the second monitoring interface are respectively disposed on the pipe body of the compressed air inlet, the compressed air outlet, the cooling medium inlet, and the cooling medium outlet. The monitoring interface component is fixedly connected to the corresponding pipe body.

[0013] Among them, the spiral heat exchanger fittings, together with the guide tube and guide plate, can enhance the heat exchange effect between fluids and improve the waste heat recovery efficiency; the flange connection end caps facilitate the maintenance and repair of the internal components of the equipment; the monitoring interface components can monitor the parameters of each port in real time, ensuring the stable operation of the equipment.

[0014] Preferably, the end cap has an annular groove on the side near the outer shell, and a sealing element is embedded inside the annular groove, and the sealing element is connected to the annular groove;

[0015] The end cap has an annular groove on the side near the outer shell. The seal embedded inside is tightly connected to the annular groove through a press-fitting process. During press-fitting, the pressure is controlled to make the seal deform evenly and fill the inner wall of the annular groove, ensuring that there is no gap between the seal and the annular groove, and preventing leakage of compressed air or cooling medium.

[0016] Preferably, the two ends of the guide tube are spaced apart from the inner side of the end cap, one end of the guide tube is connected to the end cap through a bracket, and the other end of the guide tube is provided with an inner support member, which is fixed to the end cap. The outer diameter of the inner support member is the same as the inner diameter of the guide tube.

[0017] The bracket is made of high-temperature resistant alloy steel. One end is welded to the pre-set threaded hole on the inside of the end cap, and the other end is fastened to the end flange of the guide tube by bolts. The inner support is a metal sleeve made of the same material as the guide tube. During installation, a heat fitting process is used to ensure a tight fit. At the same time, a positioning pin is added at the connection between the inner support and the end cap to prevent relative rotation.

[0018] Preferably, the perforations are evenly distributed along the axial and circumferential directions of the guide tube, and the perforations penetrate the sidewall of the guide tube;

[0019] During the fabrication of the guide tube, the distribution spacing and number of perforations in the axial and circumferential directions are first determined according to the design requirements. Using specialized drilling equipment, with the guide tube axis as a reference, drilling points are marked at the set intervals in the axial direction, and then equally divided in the circumferential direction. During drilling, the drilling depth is controlled to ensure penetration through the sidewall, and the perforation edges are smooth and burr-free, thereby achieving uniform distribution of perforations along the axial and circumferential directions of the guide tube and penetration through the sidewall.

[0020] Preferably, the guide plate is an arc-shaped plate structure, the arc-shaped contour of the guide plate is adapted to the inner wall contour of the shell, and the tilting direction of the guide plate is consistent with the direction of the cooling medium flowing from the cooling medium inlet to the cooling medium outlet.

[0021] First, locate the guide plate position on the inner wall of the outer shell, and then use welding or bolts to firmly connect the guide plate to the inner wall of the outer shell, ensuring that the tilt direction of the guide plate is consistent with the flow direction of the cooling medium, that is, from the cooling medium inlet to the cooling medium outlet, so as to achieve efficient guidance of the cooling medium.

[0022] Preferably, the support member is fixedly connected to the inner wall of the outer shell, and the support member has a groove that matches the outer diameter of the spiral heat exchange tube.

[0023] The support member is provided with pipe clamps on both sides of the slot. The pipe clamps are sleeved on the outside of the spiral heat exchange tube and are fitted to the spiral heat exchange tube and the slot.

[0024] For the connection between the support and the spiral heat exchanger tube, during actual installation, first fix the support to the inner wall of the shell by welding to ensure a firm connection; place the spiral heat exchanger tube in the slot of the support, then slip the tube clamp on the outside of the spiral heat exchanger tube, so that one side of the tube clamp fits tightly with the spiral heat exchanger tube and the other side fits tightly with the slot. Finally, use bolts to further tighten the tube clamp and the support to ensure that the spiral heat exchanger tube is stable and does not shake.

[0025] Preferably, the sealing element is an annular structure, the sealing element is a nitrile rubber sealing gasket, and the inner diameter of the sealing element is larger than the inner wall diameter of the outer shell;

[0026] If the seal fits too loosely with the ring groove during installation, a small amount of high-temperature resistant sealant can be applied to the contact surface between the seal and the ring groove to enhance the sealing effect and facilitate disassembly and maintenance. If it is too tight, the inner wall of the ring groove can be properly ground to allow the seal to be smoothly embedded in the ring groove, while ensuring that the seal and the ring groove fit tightly to prevent leakage of compressed air or cooling medium.

[0027] Preferably, the first monitoring interface and the second monitoring interface are threaded interface components. The first monitoring interface and the second monitoring interface are welded and fixed to the cooling medium inlet, the cooling medium outlet, the compressed air inlet and the compressed air outlet, respectively. The first monitoring interface and the second monitoring interface are arranged perpendicular to the axis of the cooling medium inlet, the cooling medium outlet, the compressed air inlet and the compressed air outlet.

[0028] If gaps exist between the first and second monitoring interfaces and the corresponding pipe body during welding, affecting the sealing performance, the contact surfaces between the interfaces and the pipe body can be ground smooth and cleaned before welding to remove impurities such as oil and rust. During welding, appropriate welding process parameters, such as current, voltage, and welding speed, should be selected to ensure that the weld is full and free of defects such as porosity and slag inclusions, thereby ensuring a reliable connection between the first and second monitoring interfaces and the cooling medium inlet, cooling medium outlet, compressed air inlet, and compressed air outlet.

[0029] Preferably, the number of the guide plates is four, the four guide plates are evenly distributed along the circumference of the outer shell, and the guide plates are spaced apart along the axial direction of the outer shell;

[0030] First, place the four guide plates at corresponding positions on the inner wall of the outer shell, ensuring that their arc contours match the inner wall contours and their tilt direction aligns with the flow direction of the cooling medium. Then, securely connect the guide plates to the inner wall of the outer shell by welding or bolting, ensuring that the guide plates are evenly distributed along the circumference of the outer shell and reasonably spaced along the axial direction, so that the cooling medium can flow stably in the expected direction.

[0031] Preferably, four support members are provided, and the four support members are evenly distributed at equal intervals. A second strip groove is provided on the side of the guide tube near the cooling medium inlet and the compressed air inlet, and a first strip groove is provided on the side of the guide tube away from the second strip groove.

[0032] For the first and second strip grooves inside the guide tube, the strip grooves can be directly formed on the corresponding positions of the inner wall of the guide tube using a special mold during the manufacturing of the guide tube. The support can be made of metal and integrally formed by casting process. Then, the slot area is finely machined to ensure the compatibility between the slot and the outer diameter of the spiral heat exchange tube. The tube clamp can be made of plastic material with good elasticity and manufactured by injection molding process.

[0033] In summary, compared with the prior art, the present invention provides a compressed air waste heat recovery device with the following beneficial effects:

[0034] This invention, through the synergistic design of spiral heat exchange tubes, perforated guide tubes, and guide plates, enables compressed air to flow in the spiral path and form a cross-flow and turbulence-combined contact mode with the cooling medium that is guided by the guide plates and enters in an orderly manner through the perforations of the guide tube. This achieves deep heat exchange between the two fluids. This structure breaks through the limitations of traditional single guide or straight tube heat exchange and has the advantage of significantly improving waste heat recovery efficiency. It solves the problems of insufficient fluid contact and limited heat exchange efficiency in traditional heat exchangers.

[0035] By setting monitoring interface components at both the inlet and outlet of compressed air and cooling medium, real-time monitoring of all parameters of the entire heat exchange process is achieved. Compared with the traditional single-point monitoring method, this is more systematic and enables precise control of equipment operation status. It has the advantage of timely detection and avoidance of abnormal operation and solves the problem of insufficient equipment operation stability caused by the incomplete monitoring of traditional methods. Attached Figure Description

[0036] Figure 1 This is a three-dimensional view of the overall structure of the invention.

[0037] Figure 2 This is a cross-sectional view of the outer shell structure of the invention.

[0038] Figure 3 This is a cross-sectional view of the overall structure of the invention.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Outer shell; 2. End cap; 3. Cooling medium inlet; 4. Cooling medium outlet; 5. Compressed air inlet; 6. Compressed air outlet; 7. First monitoring interface; 8. Second monitoring interface; 9. Seal; 10. Flow guide tube; 11. Perforation; 12. Flow guide plate; 13. Inner support; 14. Spiral heat exchange tube fitting; 15. Support; 16. First slot; 17. Second slot. Detailed Implementation

[0041] This invention provides a technical solution: a compressed air waste heat recovery device. Please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 ,include:

[0042] The outer shell 1, end cap 2, spiral heat exchange tube 14, guide tube 10, guide plate 12, support 15 and monitoring interface assembly. The outer shell 1 is a cylindrical hollow structure. The side wall of the outer shell 1 is provided with compressed air inlet 5, compressed air outlet 6, cooling medium inlet 3 and cooling medium outlet 4.

[0043] End caps 2 are located at both ends of the outer shell 1. The tenon and groove structure of the end caps 2 is detachably connected to the outer shell 1 through a flange structure. The spiral heat exchange tube 14 is located in the internal cavity of the outer shell 1. The two ends of the spiral heat exchange tube 14 are respectively sealed and connected to the compressed air inlet and the compressed air outlet.

[0044] The guide tube 10 is sleeved on the outside of the spiral heat exchange tube 14. The guide tube 10 is coaxially arranged with the outer shell 1. The side wall of the guide tube 10 is provided with plum blossom-shaped perforations 11.

[0045] The guide plate 12 is disposed between the inner wall of the outer shell 1 and the outer wall of the guide cylinder 10, and the guide plate 12 is fixedly connected to the inner wall of the outer shell 1.

[0046] The support member 15 is disposed on the inner wall of the outer shell 1, and the support member 15 is fixedly connected to the spiral heat exchange tube 14;

[0047] The monitoring interface component includes a first monitoring interface 7 and a second monitoring interface 8. The first monitoring interface 7 and the second monitoring interface 8 are respectively disposed in the pipe body of the compressed air inlet 5, the compressed air outlet 6, the cooling medium inlet 3 and the cooling medium outlet 4. The monitoring interface component is fixedly connected to the corresponding pipe body.

[0048] One end of the guide tube 10 is welded and fixed to the inner side of the end cover 2 by a stainless steel bracket to ensure the axial stability of the guide tube 10; the other end is provided with an inner support 13, which is fastened to the inner side of the end cover 2 by bolts, and the outer diameter of the inner support 13 matches the inner diameter of the guide tube 10 to form a stable support and prevent the guide tube 10 from shifting or vibrating during operation.

[0049] The outer shell 1 is designed as a cylindrical hollow structure with a compressed air inlet 5, a compressed air outlet 6, a cooling medium inlet 3, and a cooling medium outlet 4 to facilitate medium flow and heat exchange. The end cap 2 is detachably connected to the outer shell 1 via a flange structure for easy maintenance and repair. The spiral heat exchanger tube 14 is placed inside the outer shell 1 and is sealed to the compressed air inlet and outlet to effectively improve heat exchange efficiency. The guide tube 10 is coaxially sleeved on the outside of the spiral heat exchanger tube 14 and has quincunx-shaped perforations 11 to optimize the flow path of the cooling medium and enhance the heat exchange effect. The guide plate 12 is set between the outer shell 1 and the guide tube 10 and fixed to the inner wall of the outer shell 1 to guide the cooling medium to distribute evenly and improve heat exchange uniformity. The support 15 is fixed to the inner wall of the outer shell 1 and is firmly connected to the spiral heat exchanger tube 14 to ensure stable equipment operation. The monitoring interface assembly includes a first monitoring interface 7 and a second monitoring interface 8, which are respectively set in the inlet and outlet pipes of each medium to facilitate real-time monitoring of the equipment's operating status and ensure safe and efficient operation.

[0050] Please see Figure 2 and Figure 3The end cap 2 has an annular groove on the side near the outer shell 1, and a sealing element 9 is embedded inside the annular groove and connected to the annular groove.

[0051] The end cap 2 has an annular groove on the side near the outer shell 1. The seal 9 embedded inside it is tightly connected to the annular groove through a press-fitting process. During press-fitting, the pressure is controlled to make the seal 9 deform evenly and fill the inner wall of the annular groove, ensuring that there is no gap between the seal 9 and the annular groove, and preventing leakage of compressed air or cooling medium.

[0052] The outer shell 1 is a cylindrical hollow structure with a reasonable layout of the compressed air and cooling medium inlet and outlet. The end cap 2 is detachably connected to the outer shell 1 via a flange structure, facilitating installation and maintenance. An annular groove with a sealing element 9 is provided on the side of the end cap 2 near the outer shell 1, which can effectively prevent leakage of compressed air and cooling medium and ensure normal operation of the equipment. The guide tube 10 is coaxially arranged with the outer shell 1 and has quincunx-shaped perforations 11 on its side wall, which, together with the guide plate 12, guide the flow of cooling medium and improve heat exchange efficiency. The support member 15 fixes the spiral heat exchange tube 14 to ensure its stable operation. The monitoring interface assembly facilitates real-time monitoring of equipment operating parameters, ensuring safe and reliable operation of the equipment. The overall structure is compact and reasonable, improving the waste heat recovery effect and equipment stability.

[0053] Please see Figure 2 and Figure 3 The two ends of the guide tube 10 are respectively spaced apart from the inner side of the end cover 2. One end of the guide tube 10 is connected to the end cover 2 through a bracket. The other end of the guide tube 10 is provided with an inner support member 13, and the inner support member 13 is fixed to the end cover 2. The outer diameter of the inner support member 13 is the same as the inner diameter of the guide tube 10.

[0054] The bracket is made of high-temperature resistant alloy steel. One end is welded to the pre-set threaded hole on the inner side of the end cover 2, and the other end is fastened to the end flange of the guide tube 10 by bolts. The inner support 13 is a metal sleeve of the same material as the guide tube 10. During installation, a heat fitting process is used to ensure a tight fit. At the same time, a positioning pin is added at the connection between the inner support 13 and the end cover 2 to prevent relative rotation.

[0055] The spacing between the guide tube 10 and the end cap 2, along with the bracket connection, ensures smooth flow of compressed air outside the spiral heat exchanger tube 14 and facilitates future maintenance through the detachable bracket. The inner diameter of the inner support 13 is matched with that of the guide tube 10, effectively preventing deformation of the guide tube 10 under the impact of high-pressure cooling medium and ensuring the stability of the flow cross-sectional area of ​​the plum blossom-shaped perforation 11. At the same time, the fixed connection between the inner support 13 and the end cap 2 transmits the axial vibration of the guide tube 10 to the end cap 2, avoiding the impact of vibration on the spiral heat exchanger tube 14. In addition, this structure does not require changing the overall size of the outer shell 1 and can be achieved only through local modifications to the inside of the end cap 2, reducing manufacturing costs. Furthermore, the detachable connection of each component facilitates on-site assembly and maintenance, improving the reliability and maintenance efficiency of the equipment.

[0056] Please see Figure 2 and Figure 3 The perforations 11 are evenly distributed along the axial and circumferential directions of the guide tube 10, and the perforations 11 penetrate the side wall of the guide tube 10.

[0057] During the manufacturing process of the guide tube 10, the distribution spacing and number of perforations 11 in the axial and circumferential directions are first determined according to the design requirements. Using a special drilling equipment, with the axis of the guide tube 10 as the reference, drilling points are marked in the axial direction at a set spacing, and then marked equally in the circumferential direction. When drilling, the drilling depth is controlled to ensure that the perforations penetrate the sidewall and that the edges of the perforations 11 are smooth and burr-free, thereby achieving that the perforations 11 are evenly distributed along the axial and circumferential directions of the guide tube 10 and penetrate the sidewall.

[0058] The outer shell 1 is a cylindrical hollow structure with multiple inlets and outlets for easy media entry, exit, and connection. The end cap 2 is detachably connected to the outer shell 1 via a flange for easy maintenance and assembly. The spiral heat exchange tube 14 realizes heat exchange, and the guide tube 10 is fitted on its outer shell. The sidewall has evenly distributed and penetrating perforations 11 to facilitate uniform flow of the cooling medium. The guide plate 12 guides the flow of the cooling medium and improves heat exchange efficiency. The support member 15 fixes the spiral heat exchange tube 14 to ensure structural stability. The monitoring interface assembly facilitates parameter monitoring. The sealing member 9 enhances the sealing performance, and the inner support member 13 supports the guide tube 10. All structures work together to enable the waste heat recovery unit to operate efficiently and stably.

[0059] Please see Figure 2 and Figure 3 The guide plate 12 has an arc-shaped plate structure. The arc-shaped contour of the guide plate 12 is adapted to the inner wall contour of the outer shell 1. The tilting direction of the guide plate 12 is consistent with the direction of the cooling medium flowing from the cooling medium inlet 3 to the cooling medium outlet 4.

[0060] First, position the guide plate 12 on the inner wall of the outer shell 1, and fix the guide plate 12 to the inner wall of the outer shell 1 by welding or bolting to ensure that the tilt direction of the guide plate 12 is consistent with the flow direction of the cooling medium, that is, from the cooling medium inlet 3 to the cooling medium outlet 4, so as to achieve efficient guidance of the cooling medium.

[0061] The outer shell 1 provides structural support and space for media flow. The end cap 2 is detachably connected to the outer shell 1 via a flange for easy inspection and maintenance. The spiral heat exchange tube 14 realizes heat exchange between compressed air and cooling medium. The guide tube 10 is sleeved on the outside of the spiral heat exchange tube 14, and its quincunx-shaped perforations 11 optimize media flow. The arc-shaped structure of the guide plate 12 is adapted to the inner wall of the outer shell 1, and its tilt direction is consistent with the flow direction of the cooling medium, effectively guiding the cooling medium to flow evenly and improving heat exchange efficiency. The support 15 stabilizes the spiral heat exchange tube 14, and the monitoring interface component monitors the media parameters in real time to ensure safe operation of the equipment. The overall design is compact and reasonable, and the components work together to improve the reliability and stability of waste heat recovery.

[0062] Please see Figure 2 and Figure 3 The support member 15 is fixedly connected to the inner wall of the outer shell 1, and the support member 15 has a groove that matches the outer diameter of the spiral heat exchange tube 14.

[0063] Pipe clamps are provided on both sides of the slot outside the support member 15. The pipe clamps are sleeved on the outside of the spiral heat exchange tube 14. The pipe clamps are fitted to the spiral heat exchange tube 14 and the slot.

[0064] For the connection between the support 15 and the spiral heat exchanger tube 14, during actual installation, the support 15 is first fixed to the inner wall of the outer shell 1 by welding to ensure a firm connection; the spiral heat exchanger tube 14 is placed in the slot of the support 15, and then the tube clamp is inserted from the outside of the spiral heat exchanger tube 14 so that one side of the tube clamp fits tightly with the spiral heat exchanger tube 14 and the other side fits tightly with the slot. Finally, the tube clamp is further tightened to the support 15 with bolts to ensure that the spiral heat exchanger tube 14 is stable and does not shake.

[0065] The support member 15 is fixed to the inner wall of the outer shell 1, and its slot is adapted to the outer diameter of the spiral heat exchange tube 14, providing stable support for the spiral heat exchange tube 14. The tube clamps on both sides of the slot fit tightly on the outside of the spiral heat exchange tube 14, preventing the spiral heat exchange tube 14 from shifting due to vibration or other reasons during operation. This design ensures the stability of the spiral heat exchange tube 14 inside the outer shell 1, ensuring that compressed air and cooling medium can fully exchange heat at the spiral heat exchange tube 14, improving the efficiency and stability of waste heat recovery. At the same time, the stable structure reduces the risk of failure during equipment operation, extends the service life of the equipment, reduces maintenance costs, and is conducive to the long-term reliable operation of the compressed air waste heat recovery unit.

[0066] Please see Figure 2 and Figure 3 The sealing element 9 has a ring structure and is a nitrile rubber sealing gasket. The inner diameter of the sealing element 9 is larger than the inner wall diameter of the outer shell 1.

[0067] If the seal 9 fits too loosely with the ring groove during installation, a small amount of high-temperature resistant sealant can be applied to the contact surface between the seal 9 and the ring groove to enhance the sealing effect and facilitate disassembly and maintenance; if it is too tight, the inner wall of the ring groove can be properly ground to allow the seal 9 to be smoothly embedded in the ring groove, while ensuring that the seal 9 and the ring groove fit tightly to prevent leakage of compressed air or cooling medium.

[0068] The cylindrical hollow structure of the outer shell 1 and the various inlets and outlets on the side walls facilitate the flow of the medium; the end cap 2 is detachably connected to the outer shell 1 via a flange, facilitating internal maintenance; the spiral heat exchange tube 14 realizes heat exchange; the guide tube 10 is sleeved on its outer side, with evenly distributed plum blossom-shaped perforations 11 on the side wall, which facilitates the flow of the cooling medium; the guide plate 12 guides the flow of the cooling medium; the support 15 fixes the spiral heat exchange tube 14; the monitoring interface assembly can monitor in real time; the sealing element 9 is an annular nitrile rubber sealing gasket with an inner diameter larger than the inner wall diameter of the outer shell 1, which can effectively seal and prevent leakage.

[0069] Please see Figure 1 , Figure 2 and Figure 3 The first monitoring interface 7 and the second monitoring interface 8 are threaded interface components. The first monitoring interface 7 and the second monitoring interface 8 are welded and fixed to the cooling medium inlet 3, the cooling medium outlet 4, the compressed air inlet 5 and the compressed air outlet 6 respectively. The first monitoring interface 7 and the second monitoring interface 8 are set perpendicular to the axis of the cooling medium inlet 3, the cooling medium outlet 4, the compressed air inlet 5 and the compressed air outlet 6.

[0070] If there is a gap affecting the sealing when the first monitoring interface 7 and the second monitoring interface 8 are welded to the corresponding pipe body, the contact surfaces between the interface and the pipe body can be ground flat and cleaned before welding to remove impurities such as oil and rust. When welding, select appropriate welding process parameters, such as current, voltage and welding speed, to ensure that the weld is full and free of defects such as porosity and slag inclusion, thereby ensuring a reliable connection between the first monitoring interface 7 and the second monitoring interface 8 and the cooling medium inlet 3, the cooling medium outlet 4, the compressed air inlet 5 and the compressed air outlet 6.

[0071] The outer shell 1 is a cylindrical hollow structure with relevant interfaces. The end cap 2 is detachably connected to the outer shell 1 via a flange, facilitating installation and maintenance. The spiral heat exchange tube 14 realizes the heat exchange of compressed air. The guide tube 10 is sleeved on its outside and has plum blossom-shaped perforations 11 to optimize the flow of cooling medium. The guide plate 12 guides the flow of cooling medium, and the support 15 fixes the spiral heat exchange tube 14. The first monitoring interface 7 and the second monitoring interface 8 are threaded interfaces that are welded and fixed to the corresponding tube body and set perpendicularly to the axis, which facilitates the connection of monitoring equipment and accurately obtains the inlet and outlet parameters of cooling medium and compressed air, providing data support for the stable operation and performance optimization of the waste heat recovery unit. The synergistic effect of each structure improves the reliability and practicality of the waste heat recovery unit.

[0072] Please see Figure 2 and Figure 3 There are four guide vanes 12, which are evenly distributed along the circumference of the outer shell 1 and spaced apart along the axial direction of the outer shell 1.

[0073] First, place the four guide plates 12 at corresponding positions on the inner wall of the outer shell 1, so that their arc contours match the inner wall contours of the outer shell 1 and their tilt direction is consistent with the flow direction of the cooling medium. Then, fix the guide plates 12 to the inner wall of the outer shell 1 by welding or bolting, ensuring that the guide plates 12 are evenly distributed along the circumference of the outer shell 1 and reasonably spaced along the axial direction, so that the cooling medium can flow stably in the expected direction.

[0074] Please see Figure 2 and Figure 3 There are four support members 15, and the four support members 15 are evenly distributed at equal intervals. A second strip groove 17 is provided on the side of the guide tube 10 close to the cooling medium inlet 3 and the compressed air inlet 5. A first strip groove 16 is provided on the side of the guide tube 10 away from the second strip groove 17.

[0075] For the first strip groove 16 and the second strip groove 17 inside the guide tube 10, the strip grooves can be directly formed on the corresponding positions of the inner wall of the guide tube 10 using a special mold during the manufacturing of the guide tube 10. The support member 15 can be made of metal and integrally formed by casting process. Then, the slot part is finely machined to ensure the compatibility between the slot and the outer diameter of the spiral heat exchange tube 14. The tube clamp can be made of plastic material with good elasticity and manufactured by injection molding process.

[0076] Four support members 15 are provided and evenly distributed at equal intervals, which can provide stable and reliable support for the spiral heat exchange tube 14, preventing it from shifting or being damaged due to vibration or airflow impact during operation, and ensuring stable operation of the equipment. A second strip groove 17 is opened on the side of the guide tube 10 near the cooling medium inlet 3 and the compressed air inlet 5, and a first strip groove 16 is opened on the side away from it. This can optimize the flow path of the cooling medium and compressed air, making heat exchange more complete and efficient, and improving the waste heat recovery effect.

[0077] The invention involves the following steps: Compressed air enters the spiral heat exchanger tube 14 through the compressed air inlet 5 of the outer shell 1, and the cooling medium enters the space between the outer shell 1 and the guide tube 10 through the cooling medium inlet 3 of the outer shell 1. Guided by four guide plates 12, the medium flows to the cooling medium outlet 4. During this process, the cooling medium fully contacts the outer wall of the spiral heat exchanger tube 14 through the quincunx-shaped perforations 11 of the guide tube 10, absorbing the residual heat of the compressed air inside the spiral heat exchanger tube 14 and completing the heat exchange. After the heat exchange, the compressed air is discharged through the compressed air outlet 6, and the cooling medium is discharged through the cooling medium outlet 4. During the process, the first monitoring interface 7 and the second monitoring interface 8 monitor the parameters of each inlet and outlet medium in real time. The sealing element 9 of the end cap 2 prevents medium leakage. The four support elements 15 fix the spiral heat exchanger tube 14 with the tube clamps through the slots. One end of the guide tube 10 is supported by a bracket, and the other end is stabilized by an inner support element 13. The first strip groove 16 and the second strip groove 17 on the inner wall of the guide tube 10 optimize the medium flow and ensure that the equipment can stably recover residual heat.

Claims

1. A compressed air waste heat recovery device, characterized in that, include: The outer shell (1), end cap (2), spiral heat exchange tube (14), guide tube (10), guide plate (12), support (15) and monitoring interface assembly are provided. The outer shell (1) has a compressed air inlet (5), a compressed air outlet (6), a cooling medium inlet (3) and a cooling medium outlet (4) on its side wall. The end cap (2) is disposed at both ends of the outer shell (1) and the end cap (2) is connected to the outer shell (1) through a flange structure; the spiral heat exchange tube (14) is disposed in the internal cavity of the outer shell (1) and the two ends of the spiral heat exchange tube (14) are respectively sealed and connected to the compressed air inlet and the compressed air outlet. The guide tube (10) is sleeved on the outside of the spiral heat exchange tube (14). The guide tube (10) is coaxially arranged with the outer shell (1). The side wall of the guide tube (10) is provided with a perforation (11). The guide plate (12) is disposed between the inner wall of the outer shell (1) and the outer wall of the guide cylinder (10), and the guide plate (12) is fixedly connected to the inner wall of the outer shell (1); The support member (15) is disposed on the inner wall of the outer shell (1), and the support member (15) is fixedly connected to the spiral heat exchange tube (14); The monitoring interface component includes a first monitoring interface (7) and a second monitoring interface (8), which are respectively located on the pipes of the compressed air inlet (5), the compressed air outlet (6), the cooling medium inlet (3), and the cooling medium outlet (4).

2. The compressed air waste heat recovery device according to claim 1, characterized in that: The end cap (2) has an annular groove on the side near the outer shell (1), and a sealing element (9) is embedded inside the annular groove, and the sealing element (9) is connected to the annular groove.

3. A compressed air waste heat recovery device according to claim 1, characterized in that: The two ends of the guide tube (10) are respectively spaced apart from the inner side of the end cap (2). One end of the guide tube (10) is connected to the end cap (2) through a bracket. The other end of the guide tube (10) is provided with an inner support member (13), and the inner support member (13) is fixed to the end cap (2). The outer diameter of the inner support member (13) is the same as the inner diameter of the guide tube (10).

4. A compressed air waste heat recovery device according to claim 1, characterized in that: The perforations (11) are evenly distributed along the axial and circumferential directions of the guide tube (10), and the perforations (11) penetrate the side wall of the guide tube (10).

5. A compressed air waste heat recovery device according to claim 1, characterized in that: The guide plate (12) is an arc-shaped plate structure. The arc-shaped contour of the guide plate (12) is adapted to the inner wall contour of the outer shell (1). The tilting direction of the guide plate (12) is consistent with the direction of the cooling medium flowing from the cooling medium inlet (3) to the cooling medium outlet (4).

6. A compressed air waste heat recovery device according to claim 1, characterized in that: The support member (15) is fixedly connected to the inner wall of the outer shell (1), and the support member (15) has a groove that matches the outer diameter of the spiral heat exchange tube (14). The support member (15) is provided with pipe clamps on both sides of the slot. The pipe clamps are sleeved on the outside of the spiral heat exchange pipe (14). The pipe clamps are fitted to the spiral heat exchange pipe (14) and the slot.

7. A compressed air waste heat recovery device according to claim 1, characterized in that: The sealing element (9) is an annular structure, the sealing element (9) is a nitrile rubber sealing gasket, and the inner diameter of the sealing element (9) is larger than the inner wall diameter of the outer shell (1).

8. A compressed air waste heat recovery device according to claim 1, characterized in that: The first monitoring interface (7) and the second monitoring interface (8) are threaded interface parts. The first monitoring interface (7) and the second monitoring interface (8) are welded and fixed to the cooling medium inlet (3), the cooling medium outlet (4), the compressed air inlet (5) and the compressed air outlet (6) respectively. The first monitoring interface (7) and the second monitoring interface (8) are set perpendicular to the axis of the cooling medium inlet (3), the cooling medium outlet (4), the compressed air inlet (5) and the compressed air outlet (6).

9. A compressed air waste heat recovery device according to claim 1, characterized in that: The number of the guide plates (12) is four. The four guide plates (12) are evenly distributed along the circumferential direction of the outer shell (1) and the guide plates (12) are spaced apart along the axial direction of the outer shell (1).

10. A compressed air waste heat recovery device according to claim 1, characterized in that: The support member (15) is provided in four parts, and the four support members (15) are evenly distributed at equal intervals. The inside of the guide tube (10) is provided with a second strip groove (17) on the side close to the cooling medium inlet (3) and the compressed air inlet (5), and the inside of the guide tube (10) is provided with a first strip groove (16) on the side away from the second strip groove (17).

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