Low-temperature economizer convenient to disassemble and assemble

Abstract

The utility model discloses a low-temperature coal economizer convenient to disassemble and assemble in the technical field of low-temperature coal economizers, which comprises a shell, a mounting hole is formed in the shell, a plurality of groups of heat exchange tubes are movably connected in the mounting hole, each heat exchange tube comprises a transverse tube and a bent tube, the transverse tubes are detachably connected with the bent tubes, threads are arranged on two sides of each transverse tube, and the transverse tubes are connected with the bent tubes. The heat exchanger comprises a shell, a transverse pipe is arranged on the shell, a connecting head is in threaded connection with each of the threaded positions of the two sides of the transverse pipe, a sealing assembly is arranged in each connecting head, and an inlet header and an outlet header are detachably connected to the heat exchange pipe. The heat exchanger has the advantages that the heat exchange pipe is detached and connected with the shell through a splicing structure, and therefore the heat exchange pipe can be conveniently maintained and replaced.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature economizer technology, and in particular to a low-temperature economizer that is easy to disassemble and assemble. Background Technology

[0002] The low-temperature economizer is a crucial component of a power plant boiler system. Its primary function is to utilize the waste heat from the boiler's flue gas to heat the feedwater, thereby improving boiler thermal efficiency and saving fuel. Low-temperature economizers are typically located within the boiler's tail flue, using the heat released by the flue gas as it flows through the economizer's heating surfaces to heat the feedwater. After absorbing heat in the economizer, the feedwater's temperature rises, and it then enters the boiler's steam drum or other heating surfaces for further heating, ultimately transforming into steam. This process effectively recovers waste heat from the flue gas, improving the boiler's thermal efficiency.

[0003] However, existing technologies have some problems: existing low-temperature economizers fix the heat exchange tubes to the outer shell by welding. However, after long-term use, boiler ash will adhere to the surface of the heat exchange tubes, which will reduce their heat conduction effect. At the same time, long-term use may also cause deformation and leakage of the heat exchange tubes. Existing low-temperature economizers are welded as a whole and cannot be disassembled and replaced. The entire low-temperature economizer needs to be replaced, which will result in waste of resources. Therefore, we propose a low-temperature economizer that is easy to disassemble and install. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a convenient disassembly and assembly low-temperature economizer. By disassembling the heat exchange tubes and connecting them to the outer shell using a splicing structure, it is easy to maintain and replace the heat exchange tubes.

[0005] This utility model is implemented as follows: a conveniently detachable low-temperature economizer includes a shell with mounting holes. Multiple sets of heat exchange tubes are movably connected within the mounting holes. Each heat exchange tube includes a horizontal tube and a curved tube, which are detachably connected. Threads are provided on both sides of the horizontal tube, and connectors are threaded to the threads on both sides of the horizontal tube. A sealing component is provided inside the connector. An inlet header and an outlet header are detachably connected to the heat exchange tube.

[0006] Optionally, a first nut is rotatably connected to the connector head, and the outer wall of the bend is threaded, with the first nut threaded onto the outer wall of the bend.

[0007] Optionally, the sealing assembly includes a valve seat, which is fixedly connected to the inner wall of the connector. A valve ball is movably connected to the valve seat, and a spring is fixedly connected to the valve ball. The spring is fixedly connected to the inner wall of the connector.

[0008] Optionally, the sealing assembly further includes a push tube, which is fixedly connected to the inner wall of the bend, and has a water inlet hole. The push tube is adapted to the valve seat.

[0009] Optionally, both the inlet header and the outlet header are fixedly connected to an installation head, and a second nut is rotatably connected to the installation head, the second nut being threaded onto the horizontal pipe.

[0010] Optionally, flanges are fixedly connected to both ends of the housing, and mounting holes are provided on the flanges, with fixing bolts installed in the mounting holes.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model separates the heat exchange tube into a horizontal tube and a curved tube, which are detachably connected. Both sides of the horizontal tube are threaded, and connectors are threaded to the threads on both sides of the horizontal tube. When installing the horizontal tube, the horizontal tube is inserted into the corresponding mounting hole, and then the connectors are threaded to both sides of the horizontal tube and tightened, thereby fixing the horizontal tube to the outer shell. When installing the curved tube, the curved tube is aligned with the connectors, and then the curved tube is fixed to the horizontal tube by turning the first nut. Each set of curved tubes connects two sets of horizontal tubes, thereby connecting multiple sets of horizontal tubes to ensure that the cooling water in the heat exchange tube can flow. The installation and disassembly are simple, and the heat exchange tube is easy to maintain and replace.

[0013] 2. This utility model is equipped with a sealing component. When repairing or replacing the bend and the horizontal tube, the bend can be removed directly. The valve ball in the connector will automatically engage with the valve seat due to the spring's rebound force, as it will no longer be pushed by the push tube, thus sealing the horizontal tube. This allows the repair or replacement of the horizontal and bend tubes in one set of heat exchange tubes to be completed without affecting the operation of other heat exchange tubes, thereby improving the working efficiency of the device.

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

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram provided by this utility model.

[0017] Figure 2This is a schematic diagram of the horizontal tube provided by this utility model.

[0018] Figure 3 This is a cross-sectional view of the bent pipe provided by this utility model.

[0019] Figure 4 This is a cross-sectional view of the connector provided by this utility model.

[0020] Figure 5 This is a cross-sectional view of the mounting head provided by this utility model.

[0021] In the diagram: 1. Outer shell; 2. Heat exchange tube; 21. Horizontal tube; 22. Bend; 3. Sealing assembly; 31. Valve seat; 32. Valve ball; 33. Spring; 34. Push tube; 4. Inlet manifold; 5. Outlet manifold; 6. First nut; 7. Mounting head; 8. Second nut; 9. Flange; 10. Fixing bolt; 11. Connector. Detailed Implementation

[0022] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figures 1 to 5 As shown in the figure, the present invention provides a convenient disassembly and assembly type low temperature economizer, including a shell 1. The shell 1 is made of carbon steel or other structural steel, which has good strength and rigidity. Its main function is to fix and support the various components of the low temperature economizer to ensure its stable operation. At the same time, it serves as the inlet and outlet flue, connecting to the tail flue of the boiler to form a flue gas flow channel, guiding the flue gas through the low temperature economizer and exchanging heat with the cooling water in the heat exchange tube 2.

[0025] Furthermore, an installation hole is provided on the outer shell 1, and multiple sets of heat exchange tubes 2 are movably connected in the installation hole. The heat exchange tube 2 includes a horizontal tube 21 and a bent tube 22. The horizontal tube 21 and the bent tube 22 are detachably connected. Both sides of the horizontal tube 21 are provided with threads, and connectors 11 are threadedly connected to the threads on both sides of the horizontal tube 21.

[0026] Specifically, when installing the horizontal tube 21, the horizontal tube 21 is inserted into the corresponding mounting hole, and the connector 11 is connected to both sides of the horizontal tube 21 by thread and tightened, thereby fixing the horizontal tube 21 to the outer casing 1.

[0027] Furthermore, a first nut 6 is rotatably connected to the connector 11, and the outer wall of the bend 22 is threaded, with the first nut 6 threadedly connected to the bend 22.

[0028] Specifically, by aligning the bend 22 with the connector 11, and then fixing the bend 22 to the horizontal pipe 21 by rotating the first nut 6, each set of bends 22 connects two sets of horizontal pipes 21, thereby connecting multiple sets of horizontal pipes 21 to ensure that the cooling water in the heat exchange tube 2 can circulate.

[0029] Furthermore, a sealing component 3 is provided inside the connector 11. The sealing component 3 includes a valve seat 31, which is fixedly connected to the inner wall of the connector 11. A valve ball 32 is movably connected to the valve seat 31, and a spring 33 is fixedly connected to the valve ball 32. The spring 33 is fixedly connected to the inner wall of the connector 11.

[0030] Furthermore, the sealing assembly 3 also includes a push tube 34, which is fixedly connected to the inner wall of the bend 22. The push tube 34 has a water inlet hole and is adapted to the valve seat 31.

[0031] Specifically, when installing the bend 22, when the first nut 6 is tightened to fix the bend 22, the push tube 34 on the bend 22 will be inserted into the valve seat 31, thereby pushing the valve ball 32 to compress the spring 33 and move it, so that the valve ball 32 is no longer stuck in the valve seat 31, which allows the cooling water to flow through the horizontal pipe 21 into the bend 22 and then into the next set of horizontal pipes 21.

[0032] Furthermore, when repairing or replacing the bend 22 and the horizontal tube 21, the bend 22 can be removed directly. The valve ball 32 inside the connector 11 will no longer be pushed by the push tube 34 and will automatically engage with the valve seat 31 due to the rebound force of the spring 33, thus sealing the horizontal tube 21. This allows the repair and replacement of the horizontal tube 21 and the bend 22 in one set of heat exchange tubes 2 to be completed without affecting the operation of other heat exchange tubes 2, thereby improving the working efficiency of the device.

[0033] Furthermore, an inlet manifold 4 and an outlet manifold 5 are detachably connected to the heat exchange tube 2. An installation head 7 is fixedly connected to both the inlet manifold 4 and the outlet manifold 5. A second nut 8 is rotatably connected to the installation head 7, and the second nut 8 is threaded onto the horizontal tube 21.

[0034] Specifically, the inlet header 4 and outlet header 5 can be installed and fixed by tightening the second nut 8 onto the horizontal tube 21, and disassembly can be completed by loosening the second nut 8, making installation and disassembly convenient.

[0035] Flanges 9 are fixedly connected to both ends of the outer casing 1. Mounting holes are provided on the flanges 9, and fixing bolts 10 are installed in the mounting holes. The flanges 9 and fixing bolts 10 are used to connect and fix the device to the boiler flue.

[0036] The working principle of this utility model is as follows:

[0037] This invention splits the heat exchange tube 2 into a horizontal tube 21 and a bent tube 22, which are detachably connected. Both sides of the horizontal tube 21 are threaded, and connectors 11 are threaded to the threads on both sides of the horizontal tube 21. When installing the horizontal tube 21, it is inserted into the corresponding mounting hole, and then the connectors 11 are threaded to both sides of the horizontal tube 21 and tightened, thereby fixing the horizontal tube 21 to the outer shell 1. When installing the bent tube 22, it is aligned with the connectors 11, and then the first nut 6 is turned to fix the bent tube 22 to the horizontal tube 21. Each set of bent tubes 22 connects two sets of horizontal tubes 21, thereby connecting multiple sets of horizontal tubes 21 to ensure that the cooling water in the heat exchange tube 2 can circulate. The installation and disassembly are simple, and the heat exchange tube 2 is easy to maintain and replace.

[0038] This utility model is equipped with a sealing component 3. When repairing or replacing the bend 22 and the horizontal tube 21, the bend 22 can be directly removed. The valve ball 32 in the connector 11 will no longer be pushed by the push tube 34 and will automatically engage with the valve seat 31 due to the rebound force of the spring 33, thus sealing the horizontal tube 21. This allows the repair and replacement of the horizontal tube 21 and the bend 22 in one set of heat exchange tubes 2 to be completed without affecting the operation of other heat exchange tubes 2, thereby improving the working efficiency of the device.

[0039] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A convenient detachable low-temperature economizer, comprising a shell (1), characterized in that: The shell (1) is provided with mounting holes, a plurality of groups of heat exchange pipes (2) are movably connected in the mounting holes, the heat exchange pipe (2) comprises a horizontal pipe (21) and an elbow pipe (22), the horizontal pipe (21) and the elbow pipe (22) are detachably connected, the horizontal pipe (21) is provided with threads on both sides, the connecting head (11) is threadedly connected on the threads on both sides of the horizontal pipe (21), the connecting head (11) is provided with a sealing assembly (3) therein, and the heat exchange pipe (2) is detachably connected with an inlet header (4) and an outlet header (5).

2. The convenient dismountable low-temperature economizer according to claim 1, characterized in that: The connecting head (11) is rotatably connected with a first nut (6), the outer wall of the elbow pipe (22) is provided with threads, and the first nut (6) is threadedly connected on the elbow pipe (22).

3. The convenient dismountable low-temperature economizer according to claim 1, characterized in that: The sealing assembly (3) comprises a valve seat (31), the valve seat (31) is fixedly connected to the inner wall of the connecting head (11), the valve seat (31) is movably connected with a valve ball (32), the valve ball (32) is fixedly connected with a spring (33), and the spring (33) is fixedly connected to the inner wall of the connecting head (11).

4. The convenient dismountable low-temperature economizer according to claim 3, characterized in that: The sealing assembly (3) further comprises a push tube (34), the push tube (34) is fixedly connected to the inner wall of the elbow pipe (22), the push tube (34) is provided with a water inlet hole, and the push tube (34) is matched with the valve seat (31).

5. The convenient dismountable low-temperature economizer according to claim 1, characterized in that: The inlet header (4) and the outlet header (5) are fixedly connected with mounting heads (7), the mounting heads (7) are rotatably connected with second nuts (8), and the second nuts (8) are threadedly connected on the horizontal pipe (21).

6. The convenient dismountable low-temperature economizer according to claim 1, characterized in that: The shell (1) is fixedly connected with flange plates (9) at both ends, the flange plates (9) are provided with mounting holes, and the mounting holes are provided with fixing bolts (10).

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