Detachable low-temperature economizer system

Abstract

The detachable low-temperature economizer system comprises a tube panel body located between a smoke inlet collecting box and a smoke outlet collecting box, a smoke inlet of the tube panel body is detachably connected with a smoke outlet of the smoke inlet collecting box, and a smoke outlet of the tube panel body is detachably connected with a smoke inlet of the smoke outlet collecting box through an expansion joint. The tube panel body is composed of a bottom plate, a top plate and a plurality of tube panel modules, and the tube panel modules are sequentially arranged between the bottom plate and the top plate from top to bottom. When the tube panel is used in winter, the tube panel main body can be detached between the smoke inlet collecting box and the expansion joint, and then the tube joint with the same caliber as the tube panel main body is mounted between the smoke inlet collecting box and the expansion joint, so that the smoke inlet collecting box is communicated with the smoke outlet collecting box, and stable operation of a boiler can be ensured; and the tube panel main body of the low-temperature economizer is prevented from being damaged due to long-term scouring of high-temperature flue gas in a non-working state, and the use effect is good.

Description

Technical Field

[0001] The invention relates to the technical field of boilers, in particular to a detachable low-temperature economizer system. Background Art

[0002] 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 the 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] At present, the low-temperature economizer of the boiler is generally composed of the economizer tube panel, the inlet header and the outlet header. The tube panel adopts H-shaped fin tubes to increase the heat dissipation area and improve the thermal efficiency. The low-temperature economizer is generally fixedly installed at the tail of the boiler exhaust duct, because the exhaust temperature is relatively high at this time, and more heat energy can be used.

[0004] The purpose of adding a low-temperature economizer to the tail flue is to reduce the exhaust gas temperature. Since the temperature is high in summer, the use of a low-temperature economizer in summer can achieve the best effect; 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 the conventional low-temperature economizer is a fixed structure and cannot be moved, the heat exchange of the tube bundle is poor in the case of abnormal start-up in winter. The economizer tube bundle is subjected to the scouring of high-temperature flue gas for a long time in the flue and cannot be cooled. The tube material will creep, resulting in thinning of the wall thickness and increased stress. Long-term high temperature will change the material properties of the tube, causing the strength and stiffness of the tube to decrease, and eventually cause the tube to burst, shortening its service life. For this reason, we propose a detachable low-temperature economizer system. Summary of the invention

[0005] The object of the present invention is to provide a detachable low-temperature economizer system to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A detachable low-temperature economizer system comprises a tube panel main body located between a smoke inlet box and a smoke outlet box, wherein the smoke inlet of the tube panel main body is detachably connected to the smoke outlet of the smoke inlet box, and the smoke outlet of the tube panel main body is detachably connected to the smoke inlet of the smoke outlet box via an expansion joint, and 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.

[0007] 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, fins are fixedly connected to the outer walls of the heat exchange tubes, 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.

[0008] As a further solution of the present invention: the first side plate is connected to the adjacent first side plate, the top plate, the bottom plate, the smoke outlet of the smoke inlet header and / or the smoke inlet flange of the expansion joint.

[0009] As a further solution of the present invention: the second side panel is connected to the adjacent first side panel, top panel, bottom panel, smoke outlet of the smoke inlet header and / or smoke inlet flange of the expansion joint.

[0010] As a further solution of the present invention: 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.

[0011] Compared with the prior art, the present invention has the following beneficial effects: When the present invention is used in winter, the tube panel main body can be removed from between the smoke inlet header 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 header and the expansion joint to keep the smoke inlet header and the smoke outlet header 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 scoured 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

[0012] Figure 1 The figure is a schematic diagram of the structure of a detachable low-temperature economizer system.

[0013] Figure 2 It is a structural schematic diagram of the tube panel main body in a detachable low-temperature economizer system.

[0014] Figure 3 The figure is a schematic diagram of the structure of fins in a detachable low-temperature economizer system.

[0015] Among them, there are a smoke inlet header 1, a smoke outlet header 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

[0016] 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 below in conjunction with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can 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 can be directly connected to the other element or indirectly connected to the other element.

[0018] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0020] See also Figures 1 to 3 In an embodiment of the present invention, a detachable low-temperature economizer system 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.

[0021] By adopting the above scheme, when there is no need to use a low-temperature economizer to cool the boiler flue gas in winter, the tube panel main body 4 can be removed from between the smoke inlet header 1 and the expansion joint 3, and then a tube joint with the same diameter as the tube panel main body 4 can be installed between the smoke inlet header 1 and the expansion joint 3 to keep the smoke inlet header 1 and the smoke outlet header 2 connected, thereby ensuring the stable operation of the boiler and avoiding damage to the tube panel main body 4 of the low-temperature economizer due to long-term erosion by high-temperature flue gas in a non-working state, and the use effect is good.

[0022] Specific combination Figure 1-3In one embodiment of the present invention, 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, and the two ends of the bracket are respectively fixedly connected with a first side plate 8 and a second side plate 9, and 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.

[0023] Furthermore, 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 .

[0024] Furthermore, the second side plate 9 is 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 flange of the expansion joint 3 .

[0025] The present invention adopts the above scheme. When the tube panel body 4 is installed between the smoke inlet manifold 1 and the expansion joint 3, four tube panel modules 6 are sequentially hoisted on the bottom plate 5, and then the top plate 7 is installed. Otherwise, the tube panel body 4 can be disassembled without welding work on site. Through the arrangement of 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 module 6 to avoid collision between equipment.

[0026] In addition, based on the above embodiment, further, the low-temperature economizer also includes two spare side panels, on which 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 are provided.

[0027] After removing each screen-off 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. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to 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 protection scope of the present invention.

Claims

1. A detachable low-temperature economizer system, characterized in that: 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); 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. A detachable low-temperature economizer system according to claim 1, characterized in that: The tube panel module (6) comprises a bracket, a plurality of heat exchange tubes (10) are fixedly mounted on the inner side of the bracket, fins (11) are fixedly connected to the outer walls of the heat exchange tubes (10), adjacent heat exchange tubes (10) are interconnected via elbows, and a plurality of heat exchange tubes (10) are interconnected to form a serpentine pipe, a first side plate (8) and a second side plate (9) are fixedly connected at both ends of the bracket, a water inlet joint and a water outlet joint are sealed and penetrated on the second side plate (9), and the water inlet joint and the water outlet joint are connected to the corresponding two ends of the serpentine pipe.

3. A detachable low-temperature economizer system 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. A detachable low-temperature economizer system 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 system according to claim 1, characterized in that: It also comprises two spare side panels, on which 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) are provided.

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