Reheater system of reheating boiler

Abstract

The invention relates to the technical field of reheating boilers, in particular to a reheating boiler reheater system which comprises a boiler body, the boiler body comprises a shell, a heat exchange assembly and a smoke passing cavity, the shell comprises a base and an upper cover, a protection plate is arranged at the lower end of the upper cover, the upper cover covers the base to form the shell, and the heat exchange assembly is arranged in the shell. A smoke passing cavity allowing smoke to circulate is formed in the shell. The shell is divided into the base and the upper cover, connecting openings are formed in the two sides of the shell, one connecting opening is connected with a mounting part, the heat exchange assembly is arranged on the mounting part, the shell is provided with an air inlet pipe and an air outlet pipe, and the shell of the reheating boiler is divided into the base and the upper cover, so that the base can be fixed to the position where the base needs to be mounted firstly; parts in the reheating boiler are installed on the base or the upper cover respectively, the construction space is increased, damage caused by mutual collision of the parts is effectively avoided, then the assembled upper cover covers the base to be welded and fixed, and the complete reheating boiler is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of reheat boilers, and in particular to a reheater system of a reheat boiler. Background Art

[0002] A reheat boiler, also known as a reheater, is essentially a steam superheater that reheats low-pressure steam that has done work to a certain temperature. The function of the reheater further improves the thermal efficiency of the power plant cycle and controls the steam temperature of the last-stage blades of the turbine within an allowable range. The reheater is a heater in the boiler that heats the water vapor coming out of the turbine into superheated steam. The reheater has two functions: one is to reduce the humidity of the water vapor, which is beneficial to protecting the turbine blades; the other is to improve the relative internal efficiency and absolute internal efficiency of the turbine.

[0003] When installing an existing reheat boiler, various lifting devices are usually required to lift, assemble and weld different parts of the reheat boiler to form a complete reheat boiler. However, in actual use, since there are many internal parts in the reheat boiler, parts such as heat exchange tubes are easily bent and damaged during the installation process, which affects the use effect of the reheat boiler, resulting in insufficient heat energy recovery and utilization of the reheat boiler, and even inability to support work. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings in the prior art that heat exchange tubes and other parts are easily bent and damaged during installation, affecting the use effect of the reheat boiler, resulting in insufficient heat energy recovery and utilization of the reheat boiler, and even inability to support work, and propose a reheat boiler reheater system.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A reheat boiler reheater system is designed, comprising a boiler body, the boiler body comprising an outer shell, a heat exchange component and a smoke passage cavity, the outer shell comprising a base and an upper cover, a guard plate is arranged at the lower end of the upper cover, the upper cover is arranged on the base to form an outer shell, and a smoke passage cavity for smoke flow is formed inside the outer shell;

[0007] Both sides of the shell are provided with connection ports, one of the connection ports is connected to a mounting portion, the heat exchange component is arranged on the mounting portion, one end of the heat exchange component extends into the smoke cavity, and the shell is provided with an air inlet pipe and an air outlet pipe.

[0008] Furthermore, a sealing cover matched with the heat exchange component is provided on one side of the mounting portion, a steam inlet pipe and a steam exhaust pipe are provided on the sealing cover, and a filter component is provided on the steam inlet pipe.

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

[0010] Furthermore, a limiting plate cooperating with the baffle is fixedly provided on the installation groove, a receiving groove is provided in the limiting plate, an elastic member is connected in the receiving groove, and the elastic member is clamped with the baffle.

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

[0012] Furthermore, the heat exchange assembly includes a plurality of steam ducts, and a plurality of first supports and second supports are provided in the smoke passage chamber, and the first supports and the second supports are both fixedly connected to the plurality of steam ducts.

[0013] Furthermore, a mounting plate is fixedly provided at one end of the plurality of steam ducts away from the mounting portion, and a steam hood is connected to the other end of the mounting plate, and the steam hood is in communication with the plurality of steam ducts.

[0014] Furthermore, the air outlet pipes are provided with two symmetrical arrangement along the central axis of the shell, and the air inlet pipe is connected with a head on the side of the shell away from the mounting portion, and a partition is fixedly arranged in the shell, and the upper end of the partition forms a channel for the flow of smoke.

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

[0016] Furthermore, a support frame is fixedly provided on the base, a plurality of threaded columns are fixedly provided on the support frame, a plurality of through holes matching with the threaded columns are opened on the partition, and the partition is fixed on the support frame by nuts matching with the threaded columns.

[0017] The present invention provides a reheat boiler reheater system, which has the following beneficial effects:

[0018] In the present invention, by splitting the shell of the reheat boiler into a base and an upper cover, the base can be first fixed at a desired installation position, and then the parts in the reheat boiler can be respectively installed on the base or the upper cover, thereby increasing the construction space and effectively avoiding the parts from colliding with each other and causing damage. Then, the assembled upper cover is placed on the base for welding and fixing, thereby forming a complete reheat boiler, which is convenient and fast while reducing the probability of parts being damaged.

[0019] Secondly, in the present invention, a filter assembly is provided to filter the steam flow entering the reheat boiler to prevent impurities contained in the steam flow from adhering to the steam pipe when entering the steam pipe for heat exchange, thereby affecting the steam flow rate of the steam pipe, which may easily cause the steam pipe to be blocked and unable to be used normally after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a reheat boiler reheater system proposed by the present invention;

[0021] Figure 2 It is a structural schematic diagram of the head of the present invention;

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

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

[0024] Figure 5 It is a structural schematic diagram of the baffle of the present invention;

[0025] Figure 6 It is a schematic diagram of the enlarged structure of region A of the present invention.

[0026] In the figure: 1. boiler body; 2. shell; 21. base; 22. upper cover; 23. guard plate; 24. head; 25. partition; 26. air inlet pipe; 27. air outlet pipe; 3. heat exchange component; 31. steam guide pipe; 32. first support; 33. second support; 34. mounting plate; 35. steam hood; 4. smoke chamber; 5. mounting part; 6. sealing cover; 61. steam inlet pipe; 62. exhaust pipe; 7. filter component; 71. filter screen; 72. baffle; 73. limit plate; 74. elastic member; 75. connecting plate; 76. toggle block. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Reference Figure 1-6 A reheat boiler reheater system includes a boiler body 1, the boiler body 1 includes a shell 2, a heat exchange component 3 and a smoke cavity 4, the shell 2 includes a base 21 and an upper cover 22, a guard plate 23 is provided at the lower end of the upper cover 22, the upper cover 22 is covered on the base 21 to form the shell 2, and a smoke cavity 4 for smoke flow is formed inside the shell 2;

[0029] Connection ports are provided on both sides of the shell 2, one of which is connected to the mounting portion 5, on which the heat exchange component 3 is arranged, and one end of the heat exchange component 3 extends into the smoke chamber 4. An air inlet pipe 26 and an air outlet pipe 27 are provided on the shell 2.

[0030] In the present invention, by splitting the outer shell 2 of the boiler body 1 into a base 21 and an upper cover 22, the base 21 can be first fixed at the desired installation position, and then the parts in the reheat boiler, such as the cold water wall, can be respectively installed on the base 21 or the upper cover 22, thereby increasing the construction space, thereby effectively avoiding damage caused by collision between parts, and then the assembled upper cover 22 is lifted to the base 21 by a tower crane, a winch or an electric hoist, so that the upper cover 22 is moved down and set on the base 21 for welding and fixing, thereby 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 portion 5, and a chamber for steam flow is provided in the sealing cover 6. A steam inlet pipe 61 and a steam exhaust pipe 62 are provided on the sealing cover 6. A filter component 7 is provided on the steam inlet pipe 61. The steam inlet pipe 61 is located below the sealing cover 6, and the steam exhaust 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. A mounting groove matching the filter screen 71 and the baffle 72 is opened on the steam inlet pipe 61. The steam flow entering the reheat boiler is filtered through the filter screen 71 to prevent the debris contained in the steam flow from easily causing the heat exchange component 3 to be blocked and unable to be used normally when entering the heat exchange component 3 for heat exchange.

[0033] Furthermore, in the present embodiment, a limit plate 73 cooperating with the baffle 72 is fixedly provided on the mounting groove, a receiving groove is provided in the limit plate 73, an elastic member 74 is connected in the receiving groove, the elastic member 74 is clamped with the baffle 72, when the baffle 72 on the filter screen 71 contacts with the elastic member 74, the elastic member 74 undergoes elastic deformation, clamps the baffle 72 and fixes it, and prevents the filter screen 71 from falling off.

[0034] In this embodiment, there are two baffles 72, a connecting plate 75 is fixedly provided between the two baffles 72, and a toggle block 76 is fixedly provided on the connecting plate 75. By providing the two toggle plates 76 and the connecting plate 75, it is convenient to rotate the filter 71, thereby facilitating the installation of the filter 71 or taking out the filter 71 for replacement.

[0035] It should be noted that, in the present embodiment, the heat exchange assembly 3 includes a plurality of steam ducts 31, and a plurality of first supports 32 and second supports 33 are arranged in the smoke chamber 4. The first supports 32 and the second supports 33 are fixedly connected to the plurality of steam ducts 31, and heat exchange operation is performed by setting the steam ducts 31. In some embodiments, a partition is arranged between the mounting portion 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 the steam.

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

[0037] In addition, in this embodiment, there are two air outlet pipes 27, which are symmetrically arranged along the central axis of the outer shell 2, and an air inlet pipe 26. A head 24 is connected to the side of the outer shell 2 away from the mounting portion 5. A partition 25 is fixedly arranged inside the outer shell 2, and the upper end of the partition 25 forms a channel for the flow of smoke. The sealing of the outer shell 2 is ensured by setting the head 24 to prevent smoke overflow from causing pollution and heat loss.

[0038] In this embodiment, openings are provided on both the first support 32 and the second support 33 , 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 duct 31 .

[0039] In more detail, in this embodiment, a support frame is fixedly provided on the base 21, a plurality of threaded columns are fixedly provided on the support frame, a plurality of through holes matching with the threaded columns are opened on the partition 25, and the partition 25 is fixed to the support frame by nuts matching with the threaded columns. By providing the partition 25, the difficulty of smoke discharge is increased, thereby increasing the residence time of the smoke in the smoke chamber 4, and increasing the time for heating the steam duct 31.

[0040] Working method: During installation, first fix the base 21 to the desired installation position, then install the parts in the reheat boiler, such as the cold water wall, on the base 21 or the upper cover 22 respectively, increase the construction space, and effectively avoid the parts from colliding with each other and causing damage, and then lift the assembled upper cover 22 to the base 21 by a tower crane, a winch or an electric hoist, so that the upper cover 22 is moved down and set on the base 21 for welding and fixing, so as to form a complete reheat boiler;

[0041] The steam flow entering the reheat boiler is filtered through the filter screen 71, and the steam flowing out of the steam guide pipe 31 enters the steam hood 35 and is dispersed to each steam guide pipe 31 to heat the steam. The heated steam is discharged along the exhaust pipe 62 for use;

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

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reheat boiler reheater system, comprising a boiler body (1), characterized in that: The boiler body (1) comprises an outer shell (2), a heat exchange component (3) and a smoke passage cavity (4); the outer shell (2) comprises a base (21) and an upper cover (22); a guard plate (23) is provided at the lower end of the upper cover (22); the upper cover (22) is arranged on the base (21) to form the outer shell (2); and a smoke passage cavity (4) for smoke to flow is formed inside the outer shell (2); Both sides of the shell (2) are provided with connection ports, one of the connection ports is connected to a mounting portion (5), the heat exchange component (3) is arranged on the mounting portion (5), one end of the heat exchange component (3) extends into the smoke chamber (4), and the shell (2) is provided with an air inlet pipe (26) and an air outlet pipe (27).

2. A reheat boiler reheater system according to claim 1, characterized in that: A sealing cover (6) matched with the heat exchange component (3) is arranged on one side of the mounting portion (5); a steam inlet pipe (61) and a steam exhaust pipe (62) are arranged on the sealing cover (6); and a filter component (7) is arranged on the steam inlet pipe (61).

3. A reheat boiler reheater system according to claim 2, characterized in that: The filter assembly (7) comprises a filter screen (71), a baffle (72) is fixedly provided on the outer wall of the filter screen (71), and a mounting groove matching the filter screen (71) and the baffle (72) is provided on the steam inlet pipe (61).

4. A reheat boiler reheater system according to claim 3, characterized in that: A limiting plate (73) matched with the baffle (72) is fixedly arranged on the installation groove, a receiving groove is provided in the limiting plate (73), an elastic member (74) is connected in the receiving groove, and the elastic member (74) is clamped with the baffle (72).

5. A reheat boiler reheater system according to claim 3, characterized in that: There are two baffles (72), a connecting plate (75) is fixedly arranged between the two baffles (72), and a toggle block (76) is fixedly arranged on the connecting plate (75).

6. A reheat boiler reheater system according to claim 1, characterized in that: The heat exchange assembly (3) comprises a plurality of steam ducts (31), and a plurality of first supports (32) and second supports (33) are arranged in the smoke passage chamber (4), and the first supports (32) and the second supports (33) are both fixedly connected to the plurality of steam ducts (31).

7. A reheat boiler reheater system according to claim 6, characterized in that: A mounting plate (34) is fixedly provided at one end of the plurality of steam guide pipes (31) away from the mounting portion (5), and a steam hood (35) is connected to the other end of the mounting plate (34), and the steam hood (35) is in communication with the plurality of steam guide pipes (31).

8. A reheat boiler reheater system according to claim 1, characterized in that: The two air outlet pipes (27) are symmetrically arranged along the central axis of the shell (2); the air inlet pipe (26) is connected to a head (24) on the side of the shell (2) away from the mounting portion (5); a partition (25) is fixedly arranged inside the shell (2); the upper end of the partition (25) forms a channel for smoke flow.

9. A reheat boiler reheater system according to claim 6, characterized in that: The first support (32) and the second support (33) are both provided with openings, and the openings of the first support (32) and the second support (33) are arranged in opposite directions and spaced apart from each other, thereby increasing the length of the smoke flow path.

10. A reheat boiler reheater system according to claim 8, characterized in that: A support frame is fixedly arranged on the base (21), a plurality of threaded columns are fixedly arranged on the support frame, a plurality of through holes matching with the threaded columns are opened on the partition (25), and the partition (25) is fixed on the support frame by nuts matching with the threaded columns.

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