Exhaust gas detection cooling structure
Patent Information
- Application Number
- CN202521814470.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-26
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-08-26
AI Technical Summary
Traditional shell-and-tube heat exchangers have their heat exchange tube bundles fixedly connected to the shell, resulting in complex maintenance, difficulty in cleaning scale buildup, and insufficient heat exchange area, making it difficult to meet the rapid cooling requirements of high-flow-rate, high-temperature exhaust gases.
The design incorporates a detachable heat exchange assembly, including detachable heat exchange tube bundles, guide plates, and guide grooves. Quick assembly and disassembly are achieved through the cooperation of the tube bundle disc, guide blocks, and locking rods. The heat exchange area and flow time are increased by using annular tubes and staggered guide plates.
It simplifies the scaling removal process, shortens maintenance time, improves cooling and heat exchange efficiency, and ensures the uniformity and stability of exhaust gas cooling.
Smart Images
Figure CN224933733U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of exhaust gas detection technology, and specifically relates to an exhaust gas detection cooling structure. Background Technology
[0002] The exhaust gas detection cooling structure is a key component of the exhaust gas treatment system. Its core function is to reduce the temperature of the exhaust gas through heat exchange, ensuring that subsequent detection equipment (such as sensors and analyzers) operates within a suitable temperature range, while protecting the equipment from high-temperature damage. In the field of exhaust gas detection, shell-and-tube heat exchangers are commonly used cooling devices, but their traditional structure has many problems: the heat exchange tube bundles are mostly fixedly connected to the shell. After long-term exhaust gas cooling, dust and sticky impurities in the exhaust gas will form scale on the surface of the tube bundles. Since the heat exchange tube bundles cannot be easily disassembled, the entire device needs to be disassembled for cleaning, making maintenance operations complex and downtime long, seriously affecting detection efficiency. At the same time, exhaust gas is prone to forming local turbulence dead zones in the shell side, resulting in short contact time with the heat exchange tube bundles. Furthermore, the heat exchange area of the traditional straight tube structure is limited, making it difficult to meet the rapid cooling requirements of high-flow, high-temperature exhaust gases. Therefore, we propose an exhaust gas detection cooling structure. Summary of the Invention
[0003] The purpose of this invention is to provide a waste gas detection and cooling structure to solve the problem of low heat exchange efficiency of the heat exchange tube bundle inside the shell-and-tube heat exchanger mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a waste gas detection and cooling structure, comprising a shell-and-tube heat exchanger, wherein a waste gas inlet is fixed at the top of the shell-and-tube heat exchanger, a waste gas outlet is fixed at the bottom of the shell-and-tube heat exchanger, a condensate inlet is provided at one end of the shell-and-tube heat exchanger, and a condensate outlet is provided at the other end of the shell-and-tube heat exchanger. The two ends of the shell-and-tube heat exchanger are fixedly connected to the condensate inlet and the condensate outlet via flanges. A detachable heat exchange assembly is provided inside the shell-and-tube heat exchanger. The detachable heat exchange assembly includes heat exchange tube bundles arranged at equal intervals inside the shell-and-tube heat exchanger. Tube bundle discs are fixed at both ends of the heat exchange tube bundles, and two tube bundle discs are respectively located at the openings at both ends of the shell-and-tube heat exchanger.
[0005] Preferably, multiple annular tubes are fixedly connected between the heat exchange tube bundles, and multiple guide plates are fixedly offset vertically on the surface of the heat exchange tube bundles.
[0006] Preferably, the cross-section of the guide plate is semi-circular, and an elastic rubber block is fixed to the arc-shaped edge of the guide plate. The elastic rubber block is in close contact with the inner wall of the shell-and-tube heat exchanger.
[0007] Preferably, guide grooves are symmetrically provided on both sides of the tube bundle disk, and guide blocks are symmetrically fixed on the inner walls of the openings at both ends of the shell-and-tube heat exchanger, and the guide blocks are engaged with the guide grooves.
[0008] Preferably, the surface of the tube bundle disk is symmetrically fitted with double-layer sealing rings embedded inside the guide block, the end of the guide block is provided with a slot, and the surface of the double-layer sealing ring is fixed with a buckle that matches the slot relative to the inside of the guide groove. The buckle engages with the double-layer sealing ring, and the guide block is in close contact with the double-layer sealing ring inside the guide groove.
[0009] Preferably, locking holes are symmetrically provided at both ends of the tube bundle disk, and threaded holes are symmetrically provided through the flange surfaces at both ends of the shell-and-tube heat exchanger. A locking rod is provided on the flange surface of the shell-and-tube heat exchanger, passing through the inside of the threaded hole and connecting to the locking hole. The locking rod is screwed into the locking hole for fixed connection.
[0010] Preferably, the ends of the tube bundle disk are symmetrically provided with operating grooves, and a gripping rod is fixed inside the operating groove.
[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a detachable heat exchange assembly, with the cooperation of a tube bundle disc, guide groove, guide block, and locking rod, to achieve rapid assembly and disassembly of the heat exchange tube bundle, significantly simplifying the scaling removal process and shortening maintenance time. Simultaneously, the annular tubes between the heat exchange tube bundles increase the heat exchange area, and the staggered guide plates extend the flow time of exhaust gas within the shell side, improving cooling efficiency. The elastic rubber blocks on the arc-shaped edges of the guide plates fit snugly against the inner wall of the shell, preventing exhaust gas short-circuiting and ensuring effective flow guidance. Compared to existing technologies, this invention significantly improves the heat exchange efficiency for exhaust gas cooling and the efficiency of maintenance and cleaning. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a schematic diagram of the heat exchanger tube bundle structure of this utility model; Figure 3 This is a schematic diagram of the tube bundle disk structure of this utility model; Figure 4 This is a schematic diagram of the annular tube structure of this utility model; Figure 5 In this utility model Figure 3 Enlarged view of point B; Figure 6 In this utility model Figure 2 Enlarged view of point A; In the diagram: 1. Shell-and-tube heat exchanger; 2. Exhaust gas inlet; 3. Exhaust gas outlet; 4. Condensate inlet; 5. Condensate outlet; 100. Heat exchange tube bundle; 101. Tube bundle disc; 200. Annular tube; 201. Baffle plate; 300. Elastic rubber block; 400. Guide groove; 401. Guide block; 500. Double-layer sealing ring; 501. Slot; 502. Buckle; 600. Locking hole; 601. Screw hole; 602. Locking rod; 700. Operating groove. Detailed Implementation
[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0014] Please see Figures 1 to 6 This utility model provides a technical solution: a waste gas detection and cooling structure, including a shell-and-tube heat exchanger 1. A waste gas inlet 2 is fixed to the top of the shell-and-tube heat exchanger 1, and a waste gas outlet 3 is fixed to the bottom of the shell-and-tube heat exchanger 1. A condensate inlet 4 is provided at one end of the shell-and-tube heat exchanger 1, and a condensate outlet 5 is provided at the other end of the shell-and-tube heat exchanger 1. Both ends of the shell-and-tube heat exchanger 1 are fixedly connected to the condensate inlet 4 and the condensate outlet 5 via flanges. A detachable heat exchange assembly is provided inside the shell-and-tube heat exchanger 1. The detachable heat exchange assembly includes heat exchange tube bundles 100 evenly spaced inside the shell-and-tube heat exchanger 1. Tube bundle discs 101 are fixed to both ends of the heat exchange tube bundles 100, and the two tube bundle discs 101 are respectively located at the openings at both ends of the shell-and-tube heat exchanger 1. By fixing both ends of the heat exchange tube bundles 100 to the tube bundle discs 101 and placing the tube bundle discs 101 at the openings at both ends of the shell-and-tube heat exchanger 1, the entire heat exchange assembly is detachable. When scale forms on the surface of the heat exchange tube bundle 100, the entire heat exchanger can be removed directly for cleaning or replacement without disassembling the entire heat exchanger. This greatly simplifies the maintenance process, shortens downtime, and solves the problem of complex maintenance of traditional fixed structures.
[0015] In this embodiment, preferably, multiple annular tubes 200 are fixedly connected between the heat exchange tube bundles 100, and multiple guide plates 201 are fixedly and vertically staggered on the surface of the heat exchange tube bundles 100. The annular tubes 200 connecting the heat exchange tube bundles 100 increase the contact area with the exhaust gas and improve the heat exchange efficiency. The vertically staggered guide plates 201 can guide the exhaust gas to flow along a preset path, prolong the residence time of the exhaust gas in the heat exchanger, avoid local short circuits, ensure cooling uniformity, and solve the problems of insufficient heat exchange area and poor cooling effect in traditional structures.
[0016] In this embodiment, preferably, the cross-section of the guide plate 201 is a semi-circular structure, and an elastic rubber block 300 is fixed to the arc-shaped edge of the guide plate 201. The elastic rubber block 300 is in close contact with the inner wall of the shell-and-tube heat exchanger 1. The semi-circular guide plate 201 can optimize the flow path of the exhaust gas and reduce the dead angle of turbulence. The elastic rubber block 300 on its arc-shaped edge is in close contact with the inner wall of the heat exchanger, eliminating the gap between the guide plate 201 and the inner wall of the shell, ensuring that the exhaust gas flows completely along the guide path, avoiding the direct discharge of exhaust gas that has not been sufficiently cooled, and improving the cooling stability.
[0017] In this embodiment, preferably, guide grooves 400 are symmetrically provided on both sides of the tube bundle disk 101, and guide blocks 401 are symmetrically fixed on the inner walls of the openings at both ends of the shell-and-tube heat exchanger 1. The guide blocks 401 are engaged with the guide grooves 400, and the guide grooves 400 of the tube bundle disk 101 are engaged with the guide blocks 401 on the inner wall of the heat exchanger, providing precise guidance for the disassembly and assembly of the heat exchange components, ensuring the accuracy of alignment during tube bundle installation, avoiding poor sealing or reduced heat exchange efficiency due to installation deviations, and simplifying the disassembly and assembly operations.
[0018] In this embodiment, preferably, the surface of the tube bundle disk 101 is symmetrically fitted with double-layer sealing rings 500 embedded inside the guide block 401. The end of the guide block 401 is provided with a slot 501. The surface of the double-layer sealing ring 500 is fixed with a buckle 502 that matches the slot 501 relative to the inside of the guide slot 400. The buckle 502 engages with the double-layer sealing ring 500, and the guide block 401 is in close contact with the double-layer sealing ring 500 inside the guide slot 400. The double-layer sealing ring 500 enhances the sealing between the tube bundle disk 101 and the heat exchanger, preventing leakage of exhaust gas or condensate. The engagement of the buckle 502 with the slot 501 provides temporary positioning during the disassembly and assembly process, facilitating precise alignment of the locking hole and the screw hole, and improving installation efficiency and sealing reliability.
[0019] In this embodiment, preferably, locking holes 600 are symmetrically provided at both ends of the tube bundle disk 101, and screw holes 601 are symmetrically provided through the flange surfaces at both ends of the shell-and-tube heat exchanger 1. A locking rod 602 is provided on the flange surface of the shell-and-tube heat exchanger 1, which passes through the inside of the screw hole 601 and connects to the locking hole 600. The locking rod 602 is screwed and fixedly connected to the locking hole 600. By screwing the locking rod 602 through the screw hole 601 and fixing it to the locking hole 600, the heat exchange component is stably installed, avoiding loosening caused by vibration during operation. The detachable connection method takes into account both the reliability of the fixation and the convenience of maintenance, ensuring the long-term stable operation of the equipment.
[0020] In this embodiment, preferably, the tube bundle disk 101 has symmetrically opened operation slots 700 at its end. A gripping rod is fixed inside the operation slot 700. The gripping rod inside the operation slot 700 provides a force point for pulling out the heat exchange component, which facilitates quick manual disassembly and assembly of the tube bundle, reduces the labor cost during maintenance, and improves the ease of operation.
[0021] The working principle and usage process of this utility model are as follows: When it is necessary to disassemble the heat exchange tube bundle 100 to clean the scale on its surface, firstly, separate the condensate inlet 4 or condensate outlet 5 at either end of the shell-and-tube heat exchanger 1. Then, loosen the locking rod 602 so that its end exits from the inside of the locking hole 600 and screws into the inside of the screw hole 601, thereby releasing the positioning of the tube bundle disk 101. Next, hold the holding rod inside the operating groove 700 and pull one end of the tube bundle disk 101 outward, so that it drives the heat exchange tube bundle 100 and the other end of the tube bundle disk 101 to be pulled out of the inside of the shell-and-tube heat exchanger 1, while simultaneously driving the guide groove. The tube bundle disc 101 and the heat exchange tube bundle 100 can be pulled out from the inside of the shell-and-tube heat exchanger 1 by sliding the guide block 401 on the surface of the guide block 401 and causing the buckle 502 to be squeezed and separated from the slot 501. Then, the scale layer on the surface of the heat exchange tube bundle 100, the annular tube 200 and the guide plate 201 is cleaned. After cleaning, the tube bundle disc 101 is inserted into the inside of the shell-and-tube heat exchanger 1, so that the double sealing ring 500 is tightly fitted to the inner wall of the end opening of the shell-and-tube heat exchanger 1 to achieve the sealing effect. The guide block 401 and the guide groove 400 are engaged to provide guidance, and the buckle 502 and the slot 501 are engaged to provide guidance. The compression locking connection serves as a temporary limit, ensuring accurate alignment of the locking hole 600 and the screw hole 601. After the heat exchange tube bundle 100 drives the guide plate 201 into the shell-and-tube heat exchanger 1, the elastic rubber block 300 fixed on the arc-shaped edge of the guide plate 201 fits against the interior of the shell-and-tube heat exchanger 1, eliminating gaps between the arc-shaped edge of the guide plate 201 and the inner wall of the shell-and-tube heat exchanger 1. This ensures that the exhaust gas flows along the guide path of the guide plate 201. At this point, tightening the locking rod 602, causing its end to unscrew from the screw hole 601 and engage with the locking hole 600 for secure connection, completes the heat exchange. The heat exchange tube bundle 100 is installed and fixed, allowing condensate to enter the interior of the heat exchange tube bundle 100 through the condensate inlet 4 and flow into the multiple annular tubes 200 connected and fixed on the surface of the heat exchange tube bundle 100. Finally, it flows out through the condensate outlet 5 for circulation. The exhaust gas enters the interior of the shell-and-tube heat exchanger 1 through the exhaust gas inlet 2. The guide plate 201 guides the gas and increases the time it is transported inside the shell-and-tube heat exchanger 1, thus increasing the contact time between the exhaust gas and the heat exchange tube bundle 100 and the annular tubes 200. Furthermore, the annular tubes 200, in conjunction with the heat exchange tube bundle 100, can increase the heat exchange area to achieve a better cooling effect on the exhaust gas.
[0022] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waste gas detection and cooling structure, comprising a shell-and-tube heat exchanger (1), wherein a waste gas inlet (2) is fixed at the top of the shell-and-tube heat exchanger (1), a waste gas outlet (3) is fixed at the bottom of the shell-and-tube heat exchanger (1), a condensate inlet (4) is provided at one end of the shell-and-tube heat exchanger (1), and a condensate outlet (5) is provided at the other end of the shell-and-tube heat exchanger (1), wherein both ends of the shell-and-tube heat exchanger (1) are fixedly connected to the condensate inlet (4) and the condensate outlet (5) via flanges, characterized in that: The shell-and-tube heat exchanger (1) is provided with a detachable heat exchange assembly. The detachable heat exchange assembly includes heat exchange tube bundles (100) arranged at equal intervals inside the shell-and-tube heat exchanger (1). Both ends of the heat exchange tube bundles (100) are fixed with tube bundle disks (101). The two tube bundle disks (101) are respectively located at the openings at both ends of the shell-and-tube heat exchanger (1). Multiple annular tubes (200) are fixedly connected between the heat exchange tube bundles (100), and multiple guide plates (201) are fixedly offset vertically on the surface of the heat exchange tube bundles (100).
2. The exhaust gas detection and cooling structure according to claim 1, characterized in that: The cross-section of the guide plate (201) is a semi-circular structure. An elastic rubber block (300) is fixed to the arc-shaped edge of the guide plate (201). The elastic rubber block (300) is in close contact with the inner wall of the shell-and-tube heat exchanger (1).
3. The exhaust gas detection and cooling structure according to claim 2, characterized in that: The tube bundle disk (101) has symmetrical guide grooves (400) on both sides. The inner walls of the two ends of the shell-and-tube heat exchanger (1) are symmetrically fixed with guide blocks (401), and the guide blocks (401) are engaged with the guide grooves (400).
4. The exhaust gas detection and cooling structure according to claim 3, characterized in that: The surface of the tube bundle disk (101) is symmetrically fitted with double-layer sealing rings (500) embedded in the guide block (401). The end of the guide block (401) is provided with a slot (501). The surface of the double-layer sealing ring (500) is fixed with a buckle (502) that matches the slot (501) relative to the inside of the guide groove (400). The buckle (502) engages with the double-layer sealing ring (500). The guide block (401) is in close contact with the double-layer sealing ring (500) inside the guide groove (400).
5. The exhaust gas detection and cooling structure according to claim 4, characterized in that: The tube bundle disk (101) has symmetrical locking holes (600) at both ends. The flange surfaces of the shell-and-tube heat exchanger (1) have symmetrical threaded holes (601) through them. The flange surface of the shell-and-tube heat exchanger (1) is provided with a locking rod (602) that passes through the threaded hole (601) and connects to the locking hole (600). The locking rod (602) is screwed into the locking hole (600) for fixed connection.
6. The exhaust gas detection and cooling structure according to claim 5, characterized in that: The end of the tube bundle disk (101) is symmetrically provided with operation slots (700), and a gripping rod is fixed inside the operation slots (700).