A detachable transient heat recovery module device

Abstract

This utility model discloses a detachable instantaneous waste heat recovery module device, belonging to the technical field of waste heat recovery devices. It includes a module mounting plate for connection and fixation, and several waste heat recovery components for heat conduction. These components are detachably mounted on the module mounting plate. Each waste heat recovery component includes a thin-walled hollow tube at the heat source end and a heat exchange finned tube at the cold source end. A heat-conducting medium is disposed inside the thin-walled hollow tube, which vaporizes upon heating and is transported to the heat exchange finned tube. The outer wall of the thin-walled hollow tube is smooth. A cleaning block is provided on the top of the module mounting plate, and a high-frequency vibrator is used to abut against the cleaning block during periodic cleaning. The use of a smooth, thin-walled hollow tube reduces dust adhesion, and the cleaning block facilitates periodic cleaning of adhered dust, enabling continuous and rapid heat exchange. The use of a liquid-vapor phase change heat-conducting medium facilitates rapid heat conduction, and the heat is quickly output to the heat recovery unit through the heat exchange finned tube.

Description

Technical Field

[0001] This utility model relates to the technical field of waste heat recovery devices, and in particular to a detachable instantaneous waste heat recovery module device. Background Technology

[0002] Industrial kilns are core energy-consuming equipment, and the sensible heat carried by the high-temperature flue gas (600-1000℃) emitted by them accounts for more than 35% of the total heat input of the kiln. Effectively recovering this high-temperature waste heat is a key way to improve industrial energy efficiency and reduce carbon emissions. Currently, the waste heat recovery technologies commonly used in the industry mainly include plate heat exchangers, heat pipe heat exchangers, and regenerative combustion systems. However, these traditional technologies have two prominent common defects when dealing with high-temperature flue gas: slow response speed and untimely heat utilization: Traditional technologies require a long time from start-up to stable output, making it impossible to achieve instantaneous tracking and heat extraction under flue gas velocity and temperature fluctuations, resulting in a large amount of high-quality heat energy being wasted during start-up and changes in operating conditions. Easy ash accumulation and blockage, high maintenance costs: High-temperature flue gas contains a large amount of dust particles, and the compact fins or narrow flow channels of traditional heat exchangers are easily blocked, leading to a sharp increase in system flow resistance, increased induced draft fan energy consumption, and a sharp drop in heat exchange efficiency. Conventional mechanical rapping or steam blowing methods have limited effectiveness and are prone to damaging heat exchange surfaces. The equipment needs to be stopped frequently for cleaning, which seriously affects the continuity and economy of production.

[0003] Existing technologies suffer from slow waste heat recovery response, are prone to ash accumulation and blockage, and have high maintenance costs. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to solve the issues of slow response speed, easy ash accumulation and blockage, and high maintenance costs associated with waste heat recovery. One objective of this invention is to provide a detachable instantaneous waste heat recovery module device that solves these problems. This module employs a modular heat-conducting structure for easy disassembly, enabling rapid heat conduction and convenient maintenance and disassembly.

[0005] The solution adopted in this embodiment is: a detachable instantaneous waste heat recovery module device, including a module mounting plate for connection and fixation, and a plurality of waste heat recovery components for heat conduction, wherein the plurality of waste heat recovery components are detachably installed on the module mounting plate; the waste heat recovery components include a thin-walled hollow tube located at the heat source end and a heat exchange finned tube located at the cold source end, wherein a heat-conducting medium is disposed inside the thin-walled hollow tube, and the heat-conducting medium vaporizes after being heated and is transported to the heat exchange finned tube, wherein the outer wall of the thin-walled hollow tube is a smooth surface; a dust removal block is provided on the top of the module mounting plate, and a high-frequency vibrator is used to abut against the dust removal block during periodic dust removal.

[0006] The preferred technical solution is that the module mounting plate is arc-shaped, and during installation, the inner sidewall of the module mounting plate fits against the outer wall of the exhaust pipe. The module mounting plate has connecting parts at both ends, and the connecting parts have mounting holes. When fixing, screws are passed through the mounting holes and fixed to the outer wall of the exhaust pipe.

[0007] A preferred technical solution is that the mounting holes are angled, and the included angle between the axes of the two mounting holes is greater than the central angle corresponding to the module mounting plate.

[0008] A preferred technical solution is that a plurality of mounting sleeves are provided on the outer side of the module mounting plate, one end of the mounting sleeve is fixed to the arc surface on the outer side of the module mounting plate, the other end extends out of the outer side of the module mounting plate, and the other end of the mounting sleeve extends to the same plane.

[0009] The preferred technical solution is that the outer wall of the mounting sleeve is provided with a high-temperature thread, and a limit ring and a high-temperature nut sleeve are provided on the thin-walled hollow tube. The high-temperature nut sleeve is sleeved on the thin-walled hollow tube and connected to the high-temperature thread. The high-temperature nut sleeve pulls the limit ring tight and abuts against the end of the mounting sleeve.

[0010] A preferred technical solution is that the module mounting plate is provided with a through hole for the thin-walled hollow tube to pass through, the through hole and the thin-walled hollow tube are connected with a gap, and the inner end of the through hole is provided with a rounded corner to avoid interference.

[0011] A preferred technical solution is that the diameter of the heat exchange finned tube is larger than the diameter of the thin-walled hollow tube, and a plurality of heat exchange fins are provided on the outer wall of the heat exchange finned tube.

[0012] A preferred technical solution is that several thin-walled hollow tubes are arranged side by side through one end of the through hole, and the other end of the thin-walled hollow tubes is bent and extended into the heat recovery unit of the next process.

[0013] Compared with the prior art, the detachable instantaneous waste heat recovery module device of this utility model has the following technical effects: 1. This application discloses a detachable instantaneous waste heat recovery module device, comprising a module mounting plate for connection and fixation, and several waste heat recovery components for heat conduction. These components are detachably mounted on the module mounting plate. Each waste heat recovery component includes a thin-walled hollow tube at the heat source end and a heat exchange finned tube at the cold source end. A heat-conducting medium is disposed inside the thin-walled hollow tube, which vaporizes upon heating and is transported to the heat exchange finned tube. The outer wall of the thin-walled hollow tube is smooth. A dust removal block is provided on the top of the module mounting plate, and a high-frequency vibrator is used to abut against the dust removal block during periodic dust removal. The use of a smooth, thin-walled hollow tube reduces dust adhesion, and the dust removal block facilitates periodic cleaning of adhered dust, enabling continuous and rapid heat exchange. The use of a liquid-vapor phase-change heat transfer medium facilitates rapid heat conduction, and the heat is quickly output to the heat recovery unit through the heat exchange finned tube.

[0014] Other features and advantages of the present invention will become clear when reading the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the present invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the detachable instantaneous waste heat recovery module device provided in a specific embodiment of this utility model; Figure 2 This is a cross-sectional structural diagram of the connection between the module mounting plate and the waste heat recovery component provided in a specific embodiment of this utility model; In the picture: 1. Module mounting plate; 101. Connecting part; 102. Mounting hole; 103. Mounting sleeve; 104. High temperature thread; 105. Through hole; 106. Rounded corner; 2. Waste heat recovery component; 201. Thin-walled hollow tube; 202. Heat exchange finned tube; 203. Heat exchange plate; 204. Limiting ring; 205. High temperature nut sleeve; 3. Dust removal block. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0018] The detachable instantaneous waste heat recovery module device will be described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-2 As shown, a detachable instantaneous waste heat recovery module device includes a module mounting plate 1 for connection and fixation, and several waste heat recovery components 2 for heat conduction. These components 2 are detachably mounted on the module mounting plate 1; in this embodiment, five waste heat recovery components are mounted as a group on the module mounting plate. Multiple waste heat recovery components 2 are integrated onto a single module mounting plate 1 to form a standard, pre-assembleable recovery module. On the production site, the pre-assembled module is simply hoisted to the designated position on the exhaust pipe and fixed, significantly reducing on-site installation time and workload. This achieves modularization and standardization of the device, facilitating mass production and spare parts inventory. It greatly improves installation and maintenance efficiency. When some waste heat recovery components fail or require cleaning, the entire module can be quickly replaced, and the replaced module can be repaired offline, minimizing downtime of the main production system. The outer wall of the exhaust pipe is arc-shaped. During installation, multiple module mounting plates 1 are installed around its side wall, or they can be arranged in two groups at a 90-degree angle, allowing the waste heat recovery components 2 to be fully installed inside the exhaust pipe for heat absorption. The arc-shaped design of module mounting plate 1 is designed to fit snugly against the outer wall of the circular industrial exhaust pipe, ensuring a tight and stable connection. Multiple arrangement methods, such as a surrounding or 90-degree cross arrangement, can be flexibly adjusted according to the actual space and heat field distribution of the exhaust pipe, ensuring that the waste heat recovery component 2 covers the key areas of the flue cross-section. This maximizes and homogenizes the heat absorption of high-temperature flue gas, avoiding localized overheating or uneven heat absorption. It improves the equipment's adaptability to existing flues and facilitates retrofitting and installation. Through optimized layout, the overall waste heat recovery efficiency of the system is significantly improved.

[0020] The core structure and working principle of the waste heat recovery component 2 are as follows: the waste heat recovery component 2 includes a thin-walled hollow tube 201 located at the heat source end and a heat exchange finned tube 202 located at the cold source end. A heat-conducting medium is disposed inside the thin-walled hollow tube 201. After being heated, the heat-conducting medium vaporizes and is transported to the heat exchange finned tube 202. The outer wall of the thin-walled hollow tube 201 is a smooth surface; this structure is essentially a split heat pipe. The thin-walled hollow tube 201 is inserted into a high-temperature flue as an evaporation section. After absorbing the sensible heat of the flue gas, the heat-conducting medium inside it vaporizes instantaneously. The vapor flows rapidly to the condensation section located outside the flue, i.e., the heat exchange finned tube 202, under the action of pressure difference. The preferred medium is a FUD inorganic superconducting medium, composed of a Li2CO3-K2CO3-Cs2CO3 ternary eutectic salt, with the addition of 0.6 wt% graphene and 0.4 wt% CeO2. This medium possesses high thermal conductivity, high stability, and a low start-up temperature. Graphene, as a nanofiller, constructs a highly efficient heat conduction network; CeO2, as a stabilizer, effectively inhibits the decomposition of carbonates at high temperatures, extending the medium's lifespan. The 12% filling volume of the heat pipe's inner cavity is a key parameter verified through precise calculations and experiments. This ratio ensures sufficient liquid film formation for efficient evaporation in the evaporation section, while preventing liquid blockage in the condensation section, which would affect vapor flow and condensation reflux, thus achieving optimal heat transfer power and start-up characteristics. Utilizing phase change heat transfer, it achieves millisecond to second-level instantaneous response and extremely high heat transfer efficiency, far exceeding traditional heat conduction. The special medium formulation and optimized filling volume guarantee long-term stable operation and an ultra-long lifespan at high temperatures of 600-1000℃.

[0021] The module mounting plate 1 is equipped with a dust removal block 3 on its top. During periodic dust removal, a high-frequency vibrator is used to press against the dust removal block 3. The outer wall of the thin-walled hollow tube 201 has a smooth surface that is mechanically or electrolytically polished, significantly reducing the adhesion of dust in the flue gas. The smooth outer wall physically reduces the tendency for dust accumulation, laying a solid foundation for preventing blockage. The dust removal block 3 is made of high-strength alloy steel and is welded or bolted to the top of the module mounting plate 1, serving as the interface for external dust removal equipment. During maintenance, the operator presses the vibrator head against the dust removal block 3 and starts the machine. The vibration wave is transmitted through the module mounting plate 1 to all the thin-walled hollow tubes 201 connected to it, causing them to vibrate at high frequency and amplitude. This achieves mechanized, non-contact collective dust removal, avoiding the dangers and inefficiencies of manual cleaning.

[0022] The module mounting plate 1 is arc-shaped. During installation, the inner wall of the module mounting plate 1 fits against the outer wall of the exhaust pipe. Connecting portions 101 are provided at both ends of the module mounting plate 1, and mounting holes 102 are provided on the connecting portions 101. During fixing, screws are passed through the mounting holes 102 and then fixed to the outer wall of the exhaust pipe. The connecting portions 101 are thickened plate-like structures to provide sufficient connection strength. The mounting holes 102 are smooth holes that mate with pre-welded threaded seats on the outer wall of the exhaust pipe, and are tightened using high-temperature bolts. A flexible graphite gasket or ceramic fiber sealing tape can be placed between the module mounting plate 1 and the outer wall of the exhaust pipe to compensate for the microscopic unevenness between the two, achieving a reliable airtight seal and preventing flue gas leakage. The arc-shaped fit and the fixing at both ends ensure the rigidity and sealing of the connection, and can withstand negative or slightly positive pressure inside the flue. The structure is simple and easy to assemble and disassemble.

[0023] The mounting holes 102 are angled, and the included angle α between the axes of the two mounting holes 102 is greater than the central angle β corresponding to the module mounting plate 1. Because the mounting holes 102 are angled, the axial direction of the fixing bolts is also tilted accordingly. Since the included angle α is greater than the central angle β, the fixing bolts can effectively tighten the module mounting plate 1 after installation, thus maintaining the stability of the module mounting plate 1 during dust removal.

[0024] The quick-assembly and disassembly structure of the waste heat recovery component involves several mounting sleeves 103 on the outer side of the module mounting plate 1. One end of each mounting sleeve 103 is fixed to the arc surface on the outer side of the module mounting plate 1, while the other end extends outward from the outer side of the module mounting plate 1, with the other end of the mounting sleeve 103 extending to the same plane. The mounting sleeves 103 are made of high-temperature resistant alloy steel and are precisely welded to the module mounting plate 1 through a full-penetration weld to ensure strength and sealing. The ends of all mounting sleeves 103 are machined to the same plane, which ensures that the installation reference of each waste heat recovery component 2 is consistent and that the high-temperature nut sleeve 205 can uniformly press the limiting ring 204, achieving a reliable seal. This provides a stable installation foundation and precise positioning for the waste heat recovery component 2.

[0025] The outer wall of the mounting sleeve 103 is provided with a high-temperature thread 104. A limiting ring 204 and a high-temperature nut sleeve 205 are provided on the thin-walled hollow tube 201. The high-temperature nut sleeve 205 is fitted onto the thin-walled hollow tube 201 and connected to the high-temperature thread 104. The high-temperature nut sleeve 205 pulls the limiting ring 204 to abut against the end of the mounting sleeve 103. The high-temperature thread 104 is a coarse thread with a larger radial clearance than a standard thread to compensate for the thermal expansion differences between the thin-walled hollow tube 201, the mounting sleeve 103, and the high-temperature nut sleeve 205 due to material differences, preventing thermal stress jamming. High-temperature anti-seize grease is applied during installation, greatly reducing the risk of thread seizure at high temperatures. When the high-temperature nut sleeve 205 is tightened, it presses the end of the thin-walled hollow tube 201 against the end face of the mounting sleeve 103 through the limiting ring 204. A flexible graphite metal spiral wound gasket is placed between the end face of the mounting sleeve 103 and the limiting ring 204 to form a high-temperature and high-pressure seal. This enables quick connection and separation between the waste heat recovery component 2 and the module mounting plate 1. Disassembly only requires loosening a single nut to pull out a single pipe, resulting in excellent maintainability. Multiple anti-seize designs ensure that the threaded connection can still be easily disassembled after multiple high-temperature cycles, achieving one of the core objectives of this invention. The seal is reliable and effectively isolates the internal and external environments of the flue.

[0026] The module mounting plate 1 has a through hole 105 for the thin-walled hollow tube 201 to pass through. The through hole 105 and the thin-walled hollow tube 201 are connected with a clearance, and the inner end of the through hole 105 has a rounded corner 106. The diameter of the through hole 105 is slightly larger than the outer diameter of the thin-walled hollow tube 201, forming a clearance fit. This clearance is not for sealing, but to absorb the radial thermal expansion of the thin-walled hollow tube 201 at high temperatures, preventing the tube from being squeezed against the module mounting plate 1 after thermal expansion, thus avoiding additional stress. The rounded corner 106 is an important stress-relieving structure. It eliminates the sharp corners of the through hole 105, preventing stress concentration at the sharp corners on the surface of the thin-walled hollow tube 201 during vibration or thermal deformation, thereby effectively preventing fatigue cracking of the tube due to long-term alternating stress. This protects the core thin-walled hollow tube 201 and significantly improves the safety and service life of the equipment under high-temperature and vibration conditions. Allowing the pipes to expand freely by heat ensures the stability of the system.

[0027] The optimization of the condensation section and system connection lies in the fact that the diameter of the heat exchange finned tube 202 is larger than the diameter of the thin-walled hollow tube 201, and the outer wall of the heat exchange finned tube 202 is provided with a number of heat exchange fins 203. Increasing the diameter of the heat exchange finned tube 202 is to reduce the steam flow resistance and increase the condensation heat exchange area. The heat exchange fins 203 are usually high-frequency welded aluminum fins or stainless steel fins, which can greatly increase the contact area with the external cooling medium and enhance the condensation heat release effect. The condensed liquid FUD medium flows back to the thin-walled hollow tube 201 along the tube wall under the action of gravity. This ensures the high efficiency and continuity of the entire thermal superconducting cycle. Rapid heat dissipation at the condensation end is a prerequisite for continuous and efficient heat absorption at the evaporation end. The structure is compact, achieving maximum heat exchange capacity within a limited space.

[0028] Several thin-walled hollow tubes 201 are arranged side-by-side, passing through one end of the through hole 105, with the other end of each tube bent and extending into the heat recovery unit of the next process. The heat exchange finned tubes 202 of the condensation sections of all the thin-walled hollow tubes 201 are centrally arranged and can be housed together in a single air-cooled gas collection hood or water-cooled jacket, forming a unified heat release interface for easy connection to subsequent systems. The heat recovery unit of the next process can be a thermal oil circulation system, a steam generation system, or an ORC power generation system. The high-quality heat recovered by this invention is ultimately converted into usable heat or electricity through these systems. This achieves a modular and standardized interface between the waste heat recovery system and the energy consumption system, simplifying system integration. It provides flexibility and convenience for the cascade utilization and energy distribution of the entire waste heat recovery project.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or apparatus that includes that element.

[0030] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. The utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A detachable instantaneous waste heat recovery module device, characterized in that: It includes a module mounting plate for connection and fixation, and several waste heat recovery components for heat conduction, wherein several of the waste heat recovery components are detachably mounted on the module mounting plate; The waste heat recovery unit includes a thin-walled hollow tube located at the heat source end and a heat exchange finned tube located at the cold source end. A heat-conducting medium is disposed inside the thin-walled hollow tube. The heat-conducting medium vaporizes after being heated and is transported to the heat exchange finned tube. The outer wall of the thin-walled hollow tube is a smooth surface. The module mounting plate is equipped with a dust removal block on its top. During regular dust removal, a high-frequency vibrator is used to press against the dust removal block.

2. The detachable instantaneous waste heat recovery module device as described in claim 1, characterized in that: The module mounting plate is arc-shaped. During installation, the inner wall of the module mounting plate fits against the outer wall of the exhaust pipe. The module mounting plate has connecting parts at both ends, and the connecting parts have mounting holes. When fixing, screws are passed through the mounting holes and fixed to the outer wall of the exhaust pipe.

3. The detachable instantaneous waste heat recovery module device as described in claim 2, characterized in that: The mounting holes are angled, and the included angle between the axes of the two mounting holes is greater than the central angle corresponding to the module mounting plate.

4. The detachable instantaneous waste heat recovery module device as described in claim 2, characterized in that: The outer side of the module mounting plate is provided with a plurality of mounting sleeves. One end of the mounting sleeve is fixed to the arc surface of the outer side of the module mounting plate, and the other end extends out of the outer side of the module mounting plate, and the other end of the mounting sleeve extends to the same plane.

5. The detachable instantaneous waste heat recovery module device as described in claim 4, characterized in that: The outer wall of the mounting sleeve is provided with a high-temperature thread, and a limit ring and a high-temperature nut sleeve are provided on the thin-walled hollow tube. The high-temperature nut sleeve is sleeved on the thin-walled hollow tube and connected to the high-temperature thread. The high-temperature nut sleeve pulls the limit ring tight and abuts against the end of the mounting sleeve.

6. The detachable instantaneous waste heat recovery module device as described in claim 1, characterized in that: The module mounting plate is provided with a through hole for the thin-walled hollow tube to pass through. The through hole is connected to the thin-walled hollow tube with a gap, and the inner end of the through hole is provided with a rounded corner to avoid it.

7. The detachable instantaneous waste heat recovery module device as described in claim 1, characterized in that: The diameter of the heat exchange finned tube is larger than the diameter of the thin-walled hollow tube, and a plurality of heat exchange fins are provided on the outer wall of the heat exchange finned tube.

8. The detachable instantaneous waste heat recovery module device as described in claim 6, characterized in that: Several thin-walled hollow tubes are arranged side by side, passing through one end of the through hole, and the other end of the thin-walled hollow tubes is bent and extended into the heat recovery unit of the next process.

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