Detachable low-temperature economizer
The detachable low-temperature economizer solves the problem of tube damage caused by high-temperature flue gas scouring in winter, achieving stable operation of the boiler and improving equipment durability.
Patent Information
- Application Number
- CN202422442597.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-10
AI Technical Summary
The fixed structure of conventional low-temperature economizers cannot be shut down in winter, causing the tube bundles to be damaged by the erosion of high-temperature flue gas and shortening their service life.
A detachable low-temperature economizer is designed. The tube panel body can be detachably connected. In winter, the tube panel body is removed and pipe sections of the same diameter are installed to ensure boiler connectivity and avoid high-temperature flue gas scouring.
Avoid tube damage in winter, extend service life, ensure stable operation of boiler, and improve equipment durability.
Smart Images
Figure CN223388566U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boilers, in particular to a detachable low-temperature economizer. Background Art
[0002] An economizer is a device installed at the lower part of the flue at the rear of the boiler to recover the waste heat of the exhaust gas. It heats the boiler feed water into a heating surface of saturated water under drum pressure. Because it absorbs the heat of high-temperature flue gas, it reduces the exhaust temperature of the flue gas, saves energy and improves efficiency, so it is called an economizer.
[0003] Currently, low-temperature economizers for boilers typically consist of an economizer tube panel, an inlet header, and an outlet header. The tube panel utilizes H-shaped finned tubes to increase heat dissipation area and improve thermal efficiency. Low-temperature economizers are typically installed at the tail end of the boiler's flue gas duct, where the flue gas temperature is higher and more heat energy can be utilized.
[0004] The purpose of adding a low-temperature economizer to the tail flue is to reduce the exhaust gas temperature. Due to the high temperature in summer, the use of a low-temperature economizer in summer can achieve the best results; using a low-temperature economizer in winter will cause the exhaust gas temperature to be too low, causing low-temperature corrosion. Therefore, the low-temperature economizer is not started in winter. Since conventional low-temperature economizers are fixed structures and cannot be moved, if they are not started normally in winter, the heat exchange of the tube bundle will be poor. The economizer tube bundle will be subjected to the erosion of high-temperature flue gas in the flue for a long time and cannot be cooled. The tube material will creep, resulting in thinning of the wall thickness and increased stress. The long-term high temperature will change the material properties of the tube, causing the strength and rigidity of the tube to decrease, and eventually lead to tube rupture, shortening its service life. To this end, we propose a detachable low-temperature economizer. Utility Model Content
[0005] The purpose of the utility model is to provide a detachable low-temperature economizer to solve the problems raised in the above background technology.
[0006] To achieve the above objectives, the present invention provides the following technical solutions:
[0007] A detachable low-temperature economizer includes a tube panel main body located between a smoke inlet manifold and a smoke outlet manifold, the smoke inlet of the tube panel main body is detachably connected to the smoke outlet of the smoke inlet manifold, and the smoke outlet of the tube panel main body is detachably connected to the smoke inlet of the smoke outlet manifold via an expansion joint, the tube panel main body is composed of a bottom plate, a top plate and a plurality of tube panel modules, and the plurality of tube panel modules are sequentially arranged between the bottom plate and the top plate from top to bottom.
[0008] As a further solution of the present invention: the tube panel module includes a bracket, a plurality of heat exchange tubes are fixedly installed on the inner side of the bracket, the outer wall of the heat exchange tube is fixedly connected with fins, adjacent heat exchange tubes are interconnected through elbows, and several heat exchange tubes are interconnected to form a serpentine pipe, the two ends of the bracket are respectively fixedly connected with a first side plate and a second side plate, the second side plate is sealed with a water inlet joint and a water outlet joint, and the water inlet joint and the water outlet joint are connected to the two ends of the corresponding serpentine pipe.
[0009] As a further solution of the present invention: the first side panel is flange-connected to the adjacent first side panel, top panel, bottom panel, smoke outlet of the smoke inlet header and / or smoke inlet of the expansion joint.
[0010] As a further solution of the present invention: the second side panel is flange-connected to the adjacent first side panel, top panel, bottom panel, smoke outlet of the smoke inlet manifold and / or smoke inlet of the expansion joint.
[0011] As a further solution of the utility model: it also includes two spare side panels, and the spare side panels are provided with flanges connected to the bottom plate, the top plate, the smoke outlet of the smoke inlet header and the smoke inlet of the expansion joint.
[0012] Compared with the prior art, the beneficial effects of the present invention are:
[0013] When the utility model is used in winter, the tube panel main body can be removed from between the smoke inlet manifold and the expansion joint, and then a tube joint with the same diameter as the tube panel main body can be installed between the smoke inlet manifold and the expansion joint to keep the smoke inlet manifold and the smoke outlet manifold connected, thereby ensuring the stable operation of the boiler and preventing the tube panel main body of the low-temperature economizer from being damaged due to being eroded by high-temperature flue gas for a long time in a non-working state, and having a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a structural schematic diagram of a detachable low-temperature economizer.
[0015] Figure 2 This is a structural schematic diagram of the tube panel main body in a detachable low-temperature economizer.
[0016] Figure 3 This is a schematic diagram of the structure of the fins in a detachable low-temperature economizer.
[0017] Among them, there are a smoke inlet manifold 1, a smoke outlet manifold 2, an expansion joint 3, a tube panel body 4, a bottom plate 5, a tube panel module 6, a top plate 7, a first side plate 8, a second side plate 9, a heat exchange tube 10, and a fin 11. DETAILED DESCRIPTION
[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0019] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0020] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation as described in the specification. Therefore, it should not be understood as a limitation on the present invention.
[0021] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.
[0022] See also Figures 1 to 3 In an embodiment of the utility model, a detachable low-temperature economizer includes a tube panel body 4 located between a smoke inlet manifold 1 and a smoke outlet manifold 2, wherein the smoke inlet of the tube panel body 4 is detachably connected to the smoke outlet of the smoke inlet manifold 1, and the smoke outlet of the tube panel body 4 is detachably connected to the smoke inlet of the smoke outlet manifold 2 via an expansion joint 3, and the tube panel body 4 is composed of a bottom plate 5, a top plate 7 and a plurality of tube panel modules 6, and the plurality of tube panel modules 6 are sequentially arranged between the bottom plate 5 and the top plate 7 from top to bottom.
[0023] By adopting the above-mentioned scheme, the utility model can remove the tube panel main body 4 from between the smoke inlet manifold 1 and the expansion joint 3 when there is no need to use the low-temperature economizer to cool the boiler flue gas in winter. Thereafter, a tube joint with the same diameter as the tube panel main body 4 is installed between the smoke inlet manifold 1 and the expansion joint 3 to keep the smoke inlet manifold 1 and the smoke outlet manifold 2 connected, thereby ensuring the stable operation of the boiler and preventing the tube panel main body 4 of the low-temperature economizer from being damaged due to being eroded by high-temperature flue gas for a long time in a non-working state, and having a good use effect.
[0024] Specific combination Figure 1-3In one embodiment of the present utility model, the tube panel module 6 includes a bracket, a plurality of heat exchange tubes 10 are fixedly installed on the inner side of the bracket, and the outer wall of the heat exchange tube 10 is fixedly connected to a fin 11. Adjacent heat exchange tubes 10 are interconnected through elbows, and several heat exchange tubes 10 are interconnected to form a serpentine pipe. The two ends of the bracket are respectively fixedly connected with a first side plate 8 and a second side plate 9. The second side plate 9 is sealed with a water inlet joint and a water outlet joint, and the water inlet joint and the water outlet joint are connected to the two ends of the corresponding serpentine pipe.
[0025] Furthermore, the first side panel 8 is flange-connected to the adjacent first side panel 8 , the top panel 7 , the bottom panel 5 , the smoke outlet of the smoke inlet header 1 and / or the smoke inlet of the expansion joint 3 .
[0026] Furthermore, the second side panel 9 is flange-connected to the adjacent first side panel 8 , the top panel 7 , the bottom panel 5 , the smoke outlet of the smoke inlet header 1 and / or the smoke inlet of the expansion joint 3 .
[0027] By adopting the above-mentioned solution, the utility model can install the tube panel body 4 between the smoke inlet manifold 1 and the expansion joint 3 by sequentially hoisting four tube panel modules 6 on the bottom plate 5 and then installing the top plate 7. Conversely, the tube panel body 4 can be disassembled without any welding work on site. By setting the expansion joint 3, when the tube panel body 4 is disassembled and assembled, the expansion joint 3 can be retracted to one side to leave enough space for hoisting the tube panel modules 6, thereby avoiding collisions between devices.
[0028] In addition, based on the above embodiment, the low-temperature economizer further includes two spare side panels, which are provided with flanges connected to the bottom plate 5, the top plate 7, the smoke outlet of the smoke inlet header 1 and the smoke inlet of the expansion joint 3.
[0029] After removing each screen module 6 between the smoke inlet manifold 1 and the expansion joint 3, it is only necessary to flange-connect the two spare side panels with the bottom plate 5, the top plate 7, the smoke inlet manifold 1 and the expansion joint 3 to achieve stable connection between the smoke inlet manifold 1 and the smoke outlet manifold 2. There is no need to replace or install other pipe joints, making it more convenient to use.
[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A detachable low-temperature economizer, characterized by: The invention comprises a tube panel body (4) located between a smoke inlet box (1) and a smoke outlet box (2); a smoke inlet of the tube panel body (4) is detachably connected to a smoke outlet of the smoke inlet box (1); a smoke outlet of the tube panel body (4) is detachably connected to a smoke inlet of the smoke outlet box (2) via an expansion joint (3); the tube panel body (4) is composed of a bottom plate (5), a top plate (7) and a plurality of tube panel modules (6); and the plurality of tube panel modules (6) are sequentially arranged between the bottom plate (5) and the top plate (7) from top to bottom.
2. The detachable low-temperature economizer according to claim 1, characterized in that: The tube panel module (6) includes a bracket, a plurality of heat exchange tubes (10) are fixedly installed on the inner side of the bracket, the outer wall of the heat exchange tube (10) is fixedly connected with a fin (11), adjacent heat exchange tubes (10) are interconnected through elbows, and a plurality of heat exchange tubes (10) are interconnected to form a serpentine pipe, the two ends of the bracket are respectively fixedly connected with a first side plate (8) and a second side plate (9), the second side plate (9) is sealed with a water inlet joint and a water outlet joint, and the water inlet joint and the water outlet joint are connected with the two ends of the corresponding serpentine pipe.
3. The detachable low-temperature economizer according to claim 2, characterized in that: The first side plate (8) is flange-connected to the adjacent first side plate (8), the top plate (7), the bottom plate (5), the smoke outlet of the smoke inlet header (1), and / or the smoke inlet of the expansion joint (3).
4. The detachable low-temperature economizer according to claim 2, characterized in that: The second side plate (9) is flange-connected to the adjacent first side plate (8), the top plate (7), the bottom plate (5), the smoke outlet of the smoke inlet header (1), and / or the smoke inlet of the expansion joint (3).
5. The detachable low-temperature economizer according to claim 1, characterized in that: It also includes two spare side panels, each of which is provided with a flange connected to the bottom plate (5), the top plate (7), the smoke outlet of the smoke inlet header (1), and the smoke inlet of the expansion joint (3).
6. The detachable low-temperature economizer according to claim 1, characterized in that: It also includes two spare side panels, each of which is provided with a flange connected to the bottom plate (5), the top plate (7), the smoke outlet of the smoke inlet header (1), and the smoke inlet of the expansion joint (3).