A reheat boiler reheater system

Abstract

This invention relates to the field of reheat boiler technology, and in particular to a reheat boiler reheater system, comprising a boiler body, the boiler body including an outer shell, a heat exchange component, and a flue gas passage chamber, the outer shell including a base and an upper cover, the lower end of the upper cover being provided with a protective plate, the upper cover covering the base to form the outer shell, the interior of the outer shell forming a flue gas passage chamber for flue gas circulation; both sides of the outer shell are provided with connection ports, one of the connection ports being connected to an installation part, the heat exchange component being disposed on the installation part, the outer shell being provided with an inlet pipe and an outlet pipe, by disassembling the outer shell of the reheat boiler into a base and an upper cover, the base can be fixed in the required installation position first, and then the parts inside the reheat boiler can be installed onto the base or the upper cover respectively, increasing the construction space and effectively avoiding damage caused by collision between parts, and then the assembled upper cover is placed on the base and welded and fixed to form a complete reheat boiler.

Description

Technical Field

[0001] This invention relates to the field of reheat boiler technology, and more particularly to a reheat boiler reheater system. Background Technology

[0002] A reheat boiler, also known as a reheater, is essentially a steam superheater that reheats low-pressure steam that has already done work to a certain temperature. The reheater further improves the thermal efficiency of the power plant cycle and keeps the steam temperature of the turbine's last-stage blades within an acceptable range. The reheater is the heater in the boiler that heats the steam coming out of the turbine into superheated steam. The reheater has two functions: first, it reduces the humidity of the steam, which helps protect the turbine blades; second, it can improve the turbine's relative internal efficiency and absolute internal efficiency.

[0003] When installing existing reheat boilers, various hoisting devices are usually required to hoist, assemble, and weld different parts of the reheat boiler to form a complete reheat boiler. However, in actual use, because there are many internal parts of the reheat boiler, such as heat exchange tubes, they are easily bent and damaged during installation, which affects the performance of the reheat boiler, resulting in insufficient heat energy recovery and utilization, or even failure to support operation. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the easy bending and damage of components like heat exchange tubes during installation, which affects the performance of reheat boilers, leading to insufficient heat recovery and utilization, or even failure to support operation. Therefore, this invention proposes a reheat boiler reheater system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Design a reheater system for a reheat boiler, including a boiler body, the boiler body including an outer shell, heat exchange components and a flue gas passage chamber, the outer shell including a base and an upper cover, the lower end of the upper cover being provided with a protective plate, the upper cover covering the base to form an outer shell, and the inside of the outer shell forming a flue gas passage chamber for flue gas circulation;

[0007] Both sides of the outer shell are provided with connection ports, one of the connection ports is connected to a mounting part, the heat exchange component is disposed on the mounting part, one end of the heat exchange component extends into the flue gas chamber, and the outer shell is provided with an air inlet pipe and an air outlet pipe.

[0008] Furthermore, a sealing cover that cooperates with the heat exchange component is provided on one side of the mounting part. The sealing cover is provided with a steam inlet pipe and a steam outlet pipe, and a filter component is provided on the steam inlet pipe.

[0009] Furthermore, the filter assembly includes a filter screen, the outer wall of which is fixedly provided with a baffle, and the steam inlet pipe is provided with an installation groove that cooperates with the filter screen and the baffle.

[0010] Furthermore, a limiting plate that cooperates with the baffle is fixedly provided on the mounting groove. A receiving groove is opened in the limiting plate, and an elastic element is connected in the receiving groove. The elastic element is engaged with the baffle.

[0011] Furthermore, there are two baffles, and a connecting plate is fixedly disposed between the two baffles. A toggle block is fixedly disposed on the connecting plate.

[0012] Furthermore, the heat exchange assembly includes multiple steam pipes, and multiple first supports and second supports are provided in the flue gas chamber, with the first supports and second supports being fixedly connected to the multiple steam pipes.

[0013] Furthermore, an installation plate is fixedly provided at one end of the plurality of steam pipes away from the installation part, and a steam hood is connected to the other end of the installation plate, the steam hood being in communication with the plurality of steam pipes.

[0014] Furthermore, the exhaust pipe has two parts, which are symmetrically arranged along the central axis of the outer shell. A cap is connected to the side of the outer shell away from the mounting part. A partition is fixedly installed inside the outer shell, and the upper end of the partition forms a channel for the flow of flue gas.

[0015] Furthermore, both the first and second supports are provided with openings, and the openings of the first and second supports are in opposite directions and spaced apart from each other, thereby increasing the length of the flue gas flow path.

[0016] Furthermore, a support frame is fixedly installed on the base, and multiple threaded posts are fixedly installed on the support frame. Multiple through holes that mate with the threaded posts are opened on the partition plate, and the partition plate is fixed to the support frame by nuts engaging with the threaded posts.

[0017] The reheater system for a reheat boiler proposed in this invention has the following advantages:

[0018] In this invention, by disassembling the outer shell of the reheat boiler into a base and an upper cover, the base can be fixed in the required installation position first, and then the parts inside the reheat boiler can be installed onto the base or the upper cover respectively, increasing the construction space and effectively avoiding damage caused by collisions between parts. Then, the assembled upper cover is placed on the base and welded to fix it, forming a complete reheat boiler. This is convenient and quick, while reducing the probability of damage to parts.

[0019] Secondly, in this invention, by setting a filter assembly to filter the steam flow entering the reheat boiler, it is prevented that impurities contained in the steam flow will adhere to the steam pipe when entering the steam pipe for heat exchange, affecting the steam flow rate of the steam pipe, and easily causing the steam pipe to become blocked and unable to be used normally after long-term use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a reheater system for a reheat boiler proposed in this invention;

[0021] Figure 2 This is a schematic diagram of the structure of the end cap of the present invention;

[0022] Figure 3 This is a schematic diagram of the steam inlet pipe of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the filter screen of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the baffle of the present invention;

[0025] Figure 6 For the present invention Figure 5 A magnified structural diagram of area A.

[0026] In the diagram: 1. Boiler body; 2. Outer shell; 21. Base; 22. Upper cover; 23. Protective plate; 24. End cap; 25. Baffle plate; 26. Inlet pipe; 27. Outlet pipe; 3. Heat exchange assembly; 31. Steam guide pipe; 32. First support; 33. Second support; 34. Mounting plate; 35. Steam hood; 4. Flue gas chamber; 5. Mounting part; 6. Sealing cover; 61. Inlet pipe; 62. Exhaust pipe; 7. Filter assembly; 71. Filter screen; 72. Baffle plate; 73. Limiting plate; 74. Elastic element; 75. Connecting plate; 76. Actuating block. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Reference Figure 1-6 A reheater system for a reheat boiler includes a boiler body 1. The boiler body 1 includes an outer shell 2, a heat exchange component 3, and a flue gas passage 4. The outer shell 2 includes a base 21 and an upper cover 22. A protective plate 23 is provided at the lower end of the upper cover 22. The upper cover 22 covers the base 21 to form the outer shell 2. The inside of the outer shell 2 forms a flue gas passage 4 for flue gas circulation.

[0029] Both sides of the outer shell 2 are provided with connection ports, one of which is connected to the mounting part 5. The heat exchange component 3 is mounted on the mounting part 5, and one end of the heat exchange component 3 extends into the smoke passage 4. The outer shell 2 is provided with an air inlet pipe 26 and an air outlet pipe 27.

[0030] In this invention, by disassembling the outer shell 2 of the boiler body 1 into a base 21 and an upper cover 22, the base 21 can be fixed in the required installation position first, and then the parts inside the reheat boiler, such as the cold water wall, can be installed onto the base 21 or the upper cover 22 respectively, increasing the construction space and effectively avoiding damage caused by collisions between parts. Then, the assembled upper cover 22 is hoisted onto the base 21 by a tower crane, winch or electric hoist, so that the upper cover 22 is lowered and placed on the base 21 for welding and fixing, forming a complete reheat boiler.

[0031] Furthermore, in this embodiment, a sealing cover 6 that cooperates with the heat exchange component 3 is provided on one side of the mounting part 5. The sealing cover 6 has a steam flow chamber. An inlet pipe 61 and an outlet pipe 62 are provided on the sealing cover 6. A filter component 7 is provided on the inlet pipe 61. The inlet pipe 61 is located below the sealing cover 6, and the outlet pipe 62 is located above the sealing cover 6 to facilitate the discharge of steam.

[0032] In this embodiment, the filter assembly 7 includes a filter screen 71, and a baffle 72 is fixedly provided on the outer wall of the filter screen 71. The steam inlet pipe 61 is provided with an installation groove that cooperates with the filter screen 71 and the baffle 72. The filter screen 71 filters the steam flow entering the reheat boiler, so as to prevent impurities contained in the steam flow from causing the heat exchange assembly 3 to become blocked and unable to work properly when entering the heat exchange assembly 3 for heat exchange.

[0033] Furthermore, in this embodiment, a limiting plate 73 that cooperates with the baffle 72 is fixedly provided on the mounting groove. The limiting plate 73 has a receiving groove, and an elastic member 74 is connected in the receiving groove. The elastic member 74 is engaged with the baffle 72. When the baffle 72 on the filter screen 71 comes into contact with the elastic member 74, the elastic member 74 undergoes elastic deformation, clamping and fixing the baffle 72 to prevent the filter screen 71 from falling off.

[0034] In this embodiment, there are two baffles 72, and a connecting plate 75 is fixedly arranged between the two baffles 72. A toggle block 76 is fixedly arranged on the connecting plate 75. By setting the toggle plate 76 and the connecting plate 75, it is convenient to rotate the filter screen 71, thereby facilitating the installation of the filter screen 71 or the removal and replacement of the filter screen 71.

[0035] It should be noted that in this embodiment, the heat exchange component 3 includes multiple steam pipes 31, and multiple first supports 32 and second supports 33 are provided in the flue gas chamber 4. The first supports 32 and second supports 33 are fixedly connected to the multiple steam pipes 31. The heat exchange operation is performed by setting the steam pipes 31. In some embodiments, a partition is provided between the mounting part 5 and the sealing cover 6 to separate the steam in the sealing cover 6 from the high-temperature steam, so as to facilitate the discharge of steam.

[0036] In this embodiment, an installation plate 34 is fixedly provided at one end of the plurality of steam pipes 31 away from the installation part 5, and a steam hood 35 is connected to the other end of the installation plate 34. The steam hood 35 is connected to the plurality of steam pipes 31, and the steam flowing out of the steam pipes 31 enters the steam hood 35 and is dispersed to each steam pipe 31 to facilitate the heating of the steam.

[0037] Furthermore, in this embodiment, there are two exhaust pipes 27, which are symmetrically arranged along the central axis of the outer shell 2. A cap 24 is connected to the side of the outer shell 2 away from the mounting part 5. A partition 25 is fixedly installed inside the outer shell 2. The upper end of the partition 25 forms a channel for the flow of flue gas. The sealing of the outer shell 2 is ensured by setting the cap 24 to prevent the flue gas from overflowing and causing pollution and heat loss.

[0038] In this embodiment, both the first support 32 and the second support 33 are provided with openings, and the openings of the first support 32 and the second support 33 are in opposite directions and spaced apart from each other, thereby increasing the length of the flue gas flow path and increasing the heating effect on the steam pipe 31.

[0039] More specifically, in this embodiment, a support frame is fixedly installed on the base 21, and multiple threaded columns are fixedly installed on the support frame. Multiple through holes that cooperate with the threaded columns are opened on the partition plate 25. The partition plate 25 is fixed to the support frame by nuts cooperating with the threaded columns. By setting the partition plate 25, the difficulty of flue gas discharge is increased, thereby increasing the residence time of flue gas in the flue gas passage 4 and increasing the heating time of the steam pipe 31.

[0040] Working method: During installation, first fix the base 21 to the required installation position, then install the parts inside the reheat boiler, such as the cold water wall, onto the base 21 or the upper cover 22 respectively, increasing the construction space and thus effectively avoiding damage caused by collision between parts. Then, the assembled upper cover 22 is hoisted onto the base 21 by a tower crane, winch or electric hoist, so that the upper cover 22 is lowered and placed on the base 21 for welding and fixing, forming a complete reheat boiler.

[0041] The steam flow entering the reheat boiler is filtered by the filter screen 71. The steam flowing out of the steam pipe 31 enters the steam hood 35 and is dispersed into each steam pipe 31 for easy heating. The heated steam is discharged along the exhaust pipe 62 for use.

[0042] The flue gas enters the flue gas passage chamber 4 along the inlet pipe 26 and is finally discharged from the two outlet pipes 27. During this process, the flue gas heats the steam guide pipe 31 and increases the length of the flue gas path through multiple first supports 32 and second supports 33, thereby increasing the heating effect on the steam guide pipe 31.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A reheater system for a reheat boiler, comprising a boiler body (1), characterized in that, The boiler body (1) includes an outer shell (2), a heat exchange component (3) and a flue gas passage (4). The outer shell (2) includes a base (21) and an upper cover (22). A protective plate (23) is provided at the lower end of the upper cover (22). The upper cover (22) covers the base (21) to form the outer shell (2). The flue gas passage (4) is formed inside the outer shell (2). Both sides of the outer shell (2) are provided with connection ports, one of the connection ports is connected to the mounting part (5), the heat exchange component (3) is disposed on the mounting part (5), one end of the heat exchange component (3) extends into the smoke passage (4), and the outer shell (2) is provided with an air inlet pipe (26) and an air outlet pipe (27). A sealing cover (6) that cooperates with the heat exchange assembly (3) is provided on one side of the mounting part (5). A steam inlet pipe (61) and a steam outlet pipe (62) are provided on the sealing cover (6). A filter assembly (7) is provided on the steam inlet pipe (61). The filter assembly (7) includes a filter screen (71), and a baffle (72) is fixedly provided on the outer wall of the filter screen (71). The steam inlet pipe (61) has an installation groove that cooperates with the filter screen (71) and the baffle (72). A limiting plate (73) that cooperates with the baffle (72) is fixedly provided on the mounting groove. A receiving groove is provided in the limiting plate (73). An elastic element (74) is connected in the receiving groove. The elastic element (74) is engaged with the baffle (72). There are two baffles (72), and a connecting plate (75) is fixedly arranged between the two baffles (72). A toggle block (76) is fixedly arranged on the connecting plate (75). The heat exchange assembly (3) includes multiple steam pipes (31). Multiple first supports (32) and second supports (33) are arranged in the flue gas chamber (4). The first supports (32) and the second supports (33) are fixedly connected to the multiple steam pipes (31). A mounting plate (34) is fixedly provided at one end of the plurality of steam pipes (31) away from the mounting part (5), and a steam hood (35) is connected to the other end of the mounting plate (34), and the steam hood (35) is connected to the plurality of steam pipes (31). The exhaust pipe (27) has two parts, which are symmetrically arranged along the central axis of the outer shell (2). The outer shell (2) is connected to a cap (24) on the side away from the mounting part (5). A partition (25) is fixedly installed inside the outer shell (2), and the upper end of the partition (25) forms a channel for the flow of flue gas.

2. The reheater system for a reheat boiler according to claim 1, characterized in that: Both the first support (32) and the second support (33) are provided with openings, and the openings of the first support (32) and the second support (33) are in opposite directions and are spaced apart from each other, thereby increasing the length of the flue gas flow path.

3. A reheater system for a reheat boiler according to claim 1, characterized in that: A support frame is fixedly installed on the base (21), and multiple threaded columns are fixedly installed on the support frame. Multiple through holes that cooperate with the threaded columns are opened on the partition plate (25). The partition plate (25) is fixed to the support frame by nuts cooperating with the threaded columns.

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