A condensing steam boiler with external superheater

Abstract

The present application relates to the technical field of steam boiler flue gas treatment, and in particular to a condensing steam boiler with an external superheater, which comprises a steam boiler body and a flue gas duct arranged on the steam boiler body, wherein a first separation component for separating solid particles in the flue gas is arranged in the flue gas duct, wherein the first separation component comprises a mounting sleeve arranged on the flue gas duct, a first separation plate and a second separation plate rotatably connected to the flue gas duct, and a second separation component is also arranged in the flue gas duct; a plugging component for plugging the first separation plate and the second separation plate is arranged on the first separation plate and the second separation plate, wherein a first discharge port is provided on the mounting sleeve, and an adjusting component for plugging the first discharge port is arranged on the first separation plate. The present application has the effect of facilitating the cleaning of solid particles on the filter net in the flue gas duct.

Description

Technical Field

[0001] The present application relates to the technical field of steam boiler flue gas treatment, and in particular to a condensing steam boiler with an external superheater. Background Art

[0002] A steam boiler is a type of boiler that produces steam. Its operating principle is based primarily on thermodynamics: fuel combustion generates heat, which in turn boils water to produce steam. Steam boilers include shell boilers and water-tube boilers. Shell and water-tube boilers differ in structure, but operate on the same principle: they heat water through combustion. The circulated heated water, when heated to a certain temperature, produces steam, which is then piped into steam pipes.

[0003] For example, the Chinese patent document with the announcement number CN219308368U discloses a boiler desulfurization dust collector, a dust box, an air inlet at one end of the dust box, a guide pipe installed on the inside of the dust box, a support rod installed in the middle of the inside of the dust box, a filter assembly installed on the support rod, the guide pipe outlet is located on one side of the filter assembly, and a cleaning assembly is installed between the filter assembly and the support rod for cleaning and collecting dust on the filter assembly; the guide pipe inside the dust box is horizontal, which makes it convenient for the flue gas of the boiler to pass through the filter screen, and the filter screen can be rotated inside the dust box, which makes it convenient for the filter screen to fully contact with the flue gas, and the cleaning assembly can clean the surface of the filter screen during the rotation, and conveniently collect dust.

[0004] In the above-mentioned related technologies, when treating the flue gas of the steam boiler, the solid particles contained in the flue gas will adhere to the filter. During long-term use, the solid particles will block the filter, resulting in poor flue gas treatment effect. At this time, it is necessary to clean the fixed particles attached to the filter. Since the filter is in the flue gas pipe, the entire equipment needs to be shut down, and then the filter is taken out of the flue gas pipe to clean the solid particles on the filter. After cleaning, the filter needs to be installed in the flue gas pipe, which makes it very inconvenient to clean the fixed particles on the filter. Summary of the Invention

[0005] The present application provides a condensing steam boiler with an external superheater, which aims to solve the problem in the related art that it is inconvenient to clean solid particles on the filter screen in the flue gas duct.

[0006] The present application provides a condensing steam boiler with an external superheater, which adopts the following technical solution:

[0007] The condensing steam boiler with an external superheater comprises a steam boiler body and a flue gas duct arranged on the steam boiler body, wherein a first separation component is provided in the flue gas duct for separating solid particles in the flue gas, the first separation component comprising a mounting sleeve arranged on the flue gas duct, a first separation plate and a second separation plate rotatably connected to the flue gas duct, and the flue gas duct is further provided with a second separation component; the first separation plate and the second separation plate are both provided with a blocking component for sealing the first separation plate and the second separation plate, the mounting sleeve is provided with a first discharge opening, the first separation plate is provided with an adjusting component for blocking the first discharge opening, when the first separation plate and the second separation plate are both rotated to a horizontal state, a material storage channel is formed between the first separation plate and the second separation plate, the first separation plate and the second separation plate are in a blocked state, the first discharge opening is opened, and the second separation component continues to separate the flue gas, and an intake component is provided on the flue gas duct for adsorbing solid particles attached to the first separation plate and the second separation plate.

[0008] By adopting the above technical solution, in the initial state, when the flue gas is processed, the first separation plate and the second separation plate are both in a vertical state, and then the flue gas generated by the steam boiler enters the flue gas duct, and the solid particles in the flue gas pass through the first separation plate and the second separation plate and adhere to the surfaces of the first separation plate and the second separation plate. Then, when it is necessary to clean the solid particles on the first separation plate and the second separation plate, the first separation plate and the second separation plate are directly rotated in opposite directions, and finally the first separation plate and the second separation plate are rotated to a horizontal state, and the second separation component continues to separate the solid particles in the flue gas. At this time, a storage channel is formed between the first separation plate and the second separation plate and the inner wall of the flue gas duct, and the sealing component seals the first separation plate and the second separation plate, and at the same time the first discharge port is opened, and the suction component cleans the solid particles in the storage channel through the mounting sleeve and the first discharge port, thereby achieving the purpose of cleaning and separating at the same time, and in addition, achieving the purpose of not having to stop the machine when cleaning the solid particles, thereby making it more convenient to clean the solid particles.

[0009] Optionally, the blocking assembly includes a first mounting shaft rotatably connected to the first separation plate, a second mounting shaft arranged on the first separation plate, and a blocking plate wrapped around the first mounting shaft and the second mounting shaft, a blocking hole is opened on the blocking plate, a driving assembly for driving the first mounting shaft to rotate is provided on the flue gas duct, and a reset assembly for driving the second mounting shaft to reset is provided on the first separation plate. When the separation hole and the through hole on the first separation plate are misaligned, the first separation plate is in a blocking state.

[0010] By adopting the above technical solution, when the first separation plate and the second separation plate are rotated to a horizontal state, the first mounting shaft is driven to rotate by the driving assembly, and then the position of the sealing hole on the sealing plate is adjusted, and finally the sealing hole on the sealing plate and the through hole on the first separation plate are staggered. At this time, the purpose of sealing the first separation plate is achieved. Similarly, the second separation plate can also be sealed, and finally, the solid particles in the storage channel can be cleaned conveniently.

[0011] Optionally, the reset assembly includes a reset sleeve mounted on the second mounting shaft and a vortex spring arranged between the reset sleeve and the second mounting shaft, one end of the vortex spring is fixed on the reset sleeve, and the other end is fixed on the second mounting shaft, and the end of the sealing plate away from the first mounting shaft is wound around the reset sleeve.

[0012] By adopting the above technical solution, when the solid particles in the storage space are cleaned, the driving assembly drives the first mounting shaft to rotate in the opposite direction, and then the reset sleeve also moves in the opposite direction under the action of the volute spring, so as to make the sealing hole on the sealing plate correspond to the through hole on the first separation plate, and then the first adjustment ring and the second adjustment ring move in the opposite direction, and finally the first separation plate and the second separation plate are vertically arranged, and the vertically arranged first separation plate and the second separation plate continue to filter the flue gas, while the second separation assembly does not work.

[0013] Optionally, the driving assembly includes a driving rod rotatably connected to the flue gas duct, a driving cylinder arranged on the driving rod, and a motor for driving the driving rod to rotate. The piston rod of the driving cylinder is slidably connected to the driving rod, and a driving groove for clamping the piston rod of the driving cylinder is provided on the end face of the first mounting shaft. The cross-sections of the driving cylinder piston rod and the driving groove are both set to polygonal.

[0014] By adopting the above technical solution, when the first separation plate and the second separation plate are rotated to a horizontal state, the piston rod of the driving cylinder corresponds to the driving groove, and then the piston rod is moved into the driving groove. At this time, the driving rod, the driving cylinder and the first mounting shaft are rotated by the rotation of the motor, and then the position of the sealing hole on the sealing plate is adjusted.

[0015] Optionally, the second separation assembly includes a third separation plate and a fourth separation plate arranged vertically, and a cleaning assembly for cleaning solid particles on the second separation assembly is provided in the flue gas duct, and the cleaning assembly includes a cleaning plate slidably connected between the first separation plate and the second separation plate and a cleaning cylinder fixed on the flue gas duct, and the cleaning cylinder is used to drive the cleaning plate to move between the first separation plate and the second separation plate, and a cleaning port is provided on the mounting sleeve, and the cleaning plate pushes the solid particles into the mounting sleeve through the cleaning port, and a sealing assembly for sealing the cleaning port is provided on the mounting sleeve.

[0016] Optionally, the sealing assembly includes an arc-shaped sealing plate slidably connected to the mounting sleeve and a sealing spring fixed on the arc-shaped sealing plate, and the sealing spring is used to push the arc-shaped sealing plate to seal the cleaning port.

[0017] Optionally, a cleaning groove is provided on the cleaning plate, and a pushing surface is provided on the cleaning plate, and an inclined surface for abutting against the pushing surface is provided on the arc-shaped sealing plate.

[0018] Optionally, a superheater is provided on the steam boiler body, and the superheater includes a heat exchange box body arranged in the convection tail furnace body and a serpentine fin heat exchange tube arranged in the heat exchange box body. A smoke inlet and a smoke outlet are provided on the heat exchange box body, and the smoke inlet is connected to the exhaust pipe on the steam boiler. The heat exchange box body is provided with an inlet header and a collection header.

[0019] By adopting the above technical solution, saturated steam enters the superheater inlet header through the connecting pipe of the steam boiler body, and is distributed by the inlet header to enter the serpentine fin heat exchange tube. The saturated steam is fully heat-exchanged with the flue gas entering the heat exchange box to become superheated steam, and then enters the collecting header through the superheater, and finally enters the gas transmission pipeline through the collecting header. Since the heat exchange tubes in the superheater use large-diameter fin tubes, the number of joints welded between the tubes and the header is reduced, and the risk of leakage caused by welding quality is reduced. In addition, the use of fin tubes greatly increases the heating area of ​​the superheater, further reducing costs. At the same time, since the superheater is independently arranged outside the furnace body, the difficulty of overhauling and replacing the superheater will be greatly reduced.

[0020] In summary, this application has the following beneficial technical effects:

[0021] When it is necessary to clean the solid particles on the first separation plate and the second separation plate, the first separation plate and the second separation plate are directly rotated in opposite directions, and finally the first separation plate and the second separation plate are rotated to a horizontal state. The second separation component continues to separate the solid particles in the flue gas. At this time, a storage channel is formed between the first separation plate and the second separation plate and the inner wall of the flue gas duct, and the sealing component seals the first separation plate and the second separation plate. At the same time, the first discharge port is opened, and the suction component cleans the solid particles in the storage space through the mounting sleeve and the first discharge port, thereby achieving the purpose of cleaning and separating at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0023] Figure 2 It is a schematic diagram of the overall structure from another perspective of Example 1 of the present application.

[0024] Figure 3This is a schematic structural diagram of the flue gas duct and the first separation component of Example 1 of the present application.

[0025] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0026] Figure 5 It is a schematic structural diagram of the first separation component and the second separation component of Example 1 of the present application.

[0027] Figure 6 This is a schematic diagram of the first separation component of Example 1 of the present application rotated to a horizontal state.

[0028] Figure 7 This is a schematic diagram of the superheater installation position of Example 2 of the present application.

[0029] Figure 8 This is a schematic diagram of the superheater structure of Example 2 of the present application.

[0030] Figure 9 This is a schematic diagram of the heat exchange tube structure of Example 2 of the present application.

[0031] Figure 10 yes Figure 9 Enlarged view of point C in the middle.

[0032] Reference numerals: 01, steam boiler body; 011, cleaning groove; 012, pushing surface; 013, inclined surface; 014, cleaning port; 02, flue gas duct; 03, first discharge port; 04, second discharge port; 05, cleaning channel; 06, abutment block; 07, storage channel; 08, through hole; 09, blocking hole; 1, first separation assembly; 11, mounting sleeve; 12, first separation plate; 13, second separation plate; 2, second separation assembly; 21, third separation plate; 22, fourth separation plate; 3, adjustment assembly; 31, First adjusting ring; 32. Second adjusting ring; 4. Sealing assembly; 41. First mounting shaft; 42. Second mounting shaft; 43. Sealing plate; 5. Suction assembly; 51. Collecting box; 52. Suction pipe; 53. Suction pump; 8. Cleaning assembly; 81. Cleaning cylinder; 82. Cleaning plate; 9. Sealing assembly; 91. Arc-shaped sealing plate; 92. Sealing spring; 10. Superheater; 101. Heat exchange box; 102. Heat exchange tube; 103. Smoke inlet; 104. Smoke outlet; 105. Inlet header; 106. Collection header. DETAILED DESCRIPTION

[0033] The following combination Figures 1-10 This application is described in further detail.

[0034] Example 1:

[0035] The embodiment of the present application discloses a condensing steam boiler with an external superheater. Figures 1 to 6 A condensing steam boiler with an external superheater includes a steam boiler body 01 and a flue gas duct 02 arranged on the steam boiler body 01. A first separation component 1 and a second separation component 2 are arranged in the flue gas duct 02. The first separation component 1 and the second separation component 2 are both used to separate solid particles in the flue gas. Then, when cleaning the solid particles on the first separation component 1, the second separation component 2 can still filter the flue gas.

[0036] Reference Figures 1 to 6 The first separation component 1 includes a mounting sleeve 11 fixedly installed in the flue gas duct 02 and a first separation plate 12 and a second separation plate 13 rotatably connected to the flue gas duct 02. A plurality of through holes 08 are provided on the first separation plate 12 and the second separation plate 13. After the flue gas passes through the through holes 08, solid particles will adhere to the surface of the first separation plate 12 and the second separation plate 13. In the initial state, the first separation plate 12 and the second separation plate 13 are in a vertical state. Then, when it is necessary to clean the solid particles on the first separation plate 12 and the second separation plate 13, the first separation plate 12 and the second separation plate 13 are rotated to a horizontal state.

[0037] Reference Figures 1 to 6 , an adjustment assembly 3 is provided on the mounting sleeve 11, and the adjustment assembly 3 includes a first adjustment ring 31 and a second adjustment ring 32, the first adjustment ring 31 is fixed on the first separation plate 12, and the first adjustment ring 31 is rotatably connected to the surface of the mounting sleeve 11, the second adjustment ring 32 is fixed on the second separation plate 13, and the second adjustment ring 32 is rotatably connected to the surface of the first adjustment ring 31, the diameter of the first adjustment ring 31 is smaller than the diameter of the second adjustment ring 32; an abutment block 06 is fixedly installed on the end of the first separation plate 12 and the second separation plate 13 away from the mounting sleeve 11, the abutment block 06 and the first separation plate 12 are arranged perpendicularly, and an arc surface is provided on the abutment block 06, thereby facilitating the rotation of the first separation plate 12 and the second separation plate 13 in the flue gas duct 02, when the first separation plate 12 and the second separation plate 13 are rotated to a horizontal state, the two abutment blocks 06 abut against each other, at this time the first separation plate 12 and the second separation plate 13 are arranged parallel and spaced apart, and then a storage channel 07 is formed between the first separation plate 12 and the second separation plate 13 and the inner wall of the flue gas duct 02.

[0038] Reference Figures 1 to 6In order to facilitate the rotation of the first adjustment ring 31 and the second adjustment ring 32, a control component is provided on the flue gas duct 02. The control component includes a first control ring and a second control ring rotatably connected to the flue gas duct 02. The first control ring and the second control ring are arranged at opposite ends of the mounting sleeve 11. The first control ring is rotatably connected to the flue gas duct 02 and is fixed to the first adjustment ring 31. The second control ring is rotatably connected to the flue gas duct 02 and is fixed to the second adjustment ring 32. In this embodiment, a motor (not shown in the figure) is provided on the flue gas duct 02, and the first control ring and the second control ring can be driven to rotate by the motor and the belt.

[0039] Reference Figures 1 to 6 , a sealing component 4 is provided on the first separation plate 12 and the second separation plate 13, and the sealing component 4 is used to seal the through hole 08 on the first separation plate 12 and the second separation plate 13, and then the storage channel 07 is in a sealed state; a first discharge port 03 is provided on the mounting sleeve 11, and the length of the first discharge port 03 is less than the length of the mounting sleeve 11, and a second discharge port 04 is provided on the first adjusting ring 31, and the length of the second discharge port 04 is less than the length of the first adjusting ring 31. At the same time, a second discharge port 04 is also provided on the second adjusting ring 32, and the length of the second discharge port 04 is less than the length of the first adjusting ring 31 and the second adjusting ring 32. When the first separation plate 12 and the second separation plate 13 are in a vertical state, the first adjusting ring 31 and the second adjusting ring 32 seal the first discharge port 03. At this time, the second discharge port 04 and the first discharge port 03 are staggered, and then when the first separation plate 12 and the second separation plate 13 are rotated to a horizontal state, the first discharge port 03 and the second discharge port 04 are correspondingly set.

[0040] Reference Figures 1 to 6 An air suction component 5 is provided on the flue gas duct 02, and the air suction component 5 is used to clean the solid particles on the surface of the first separation plate 12 and the second separation plate 13. In this embodiment, both ends of the mounting sleeve 11 are set as sealing structures. The air suction component 5 includes a collection box 51 set on the ground and an air suction pipe 52 for connecting the collection box 51 and the mounting sleeve 11. One end of the air suction pipe 52 is connected to the inside of the mounting sleeve 11, and the other end is connected to the collection box 51. Then, an air suction pump 53 is provided on the collection box 51, and the solid particles in the storage channel 07 are sucked into the collection box 51 through the air suction pump 53.

[0041] Reference Figures 1 to 6The sealing assembly 4 includes a first mounting shaft 41 rotatably connected to the first separation plate 12, a second mounting shaft 42 arranged on the first separation plate 12, and a sealing plate 43 fixed on the first mounting shaft 41. A plurality of sealing holes 09 are opened on the sealing plate 43. When the first separation plate 12 and the second separation plate 13 are both in a vertical state, the sealing holes 09 correspond to the through holes 08 on the first separation plate 12.

[0042] Reference Figures 1 to 6 A reset assembly (not shown in the figure) is provided on the second mounting shaft 42, and the reset assembly includes a reset sleeve sleeved on the second mounting shaft 42 and a scroll spring arranged between the reset sleeve and the second mounting shaft 42, the reset sleeve is rotatably connected to the first separation plate 12, and the end of the sealing plate 43 away from the first mounting shaft 41 is fixed on the reset sleeve and wound on the reset sleeve. In this embodiment, the sealing plate 43 is set to a flexible and high-temperature resistant material, one end of the scroll spring is fixed on the reset sleeve, and the other end is fixed on the second mounting shaft 42. At the same time, a driving assembly is provided on the flue gas duct 02, and the driving assembly is used to drive the first mounting shaft 41 to rotate. When the first mounting shaft 41 rotates, it drives the sealing plate 43 to wind around the first mounting shaft 41, and at the same time, the sealing plate 43 wound around the reset sleeve is unfolded. As the sealing plate 43 moves, the sealing hole 09 and the through hole 08 are staggered, thereby facilitating the sealing of the first separation plate 12.

[0043] Reference Figures 1 to 6 After the solid particles on the first separation plate 12 and the second separation plate 13 are cleaned, the driving assembly drives the first mounting shaft 41 to rotate in the opposite direction. At this time, the mounting sleeve 11 rotates in the opposite direction under the action of the spiral spring, and then the blocking hole 09 and the through hole 08 are arranged correspondingly. In this embodiment, the first separation plate 12 and the second separation plate 13 are both provided with a blocking assembly 4. Here, the specific structure of the blocking assembly 4 on the second separation plate 13 is not described in detail, and two driving assemblies are also provided on the flue gas duct 02, and the two driving assemblies are used to respectively drive the first mounting shafts 41 on the first separation plate 12 and the second separation plate 13 to rotate.

[0044] Reference Figures 1 to 6The driving assembly includes a driving rod rotatably connected to the flue gas duct 02, a driving cylinder arranged on the driving rod, and a motor for driving the driving rod to rotate. The piston rod of the driving cylinder is slidably connected to the driving rod, and a driving groove for clamping the piston rod of the driving cylinder is opened on the end face of the first rotating shaft. The cross-sections of the driving cylinder piston rod and the driving groove are both set to polygonal. In this embodiment, the cross-section of the driving rod cylinder piston rod is set to rectangular; when the first separation plate 12 and the second separation plate 13 are rotated to a horizontal state, the piston rod of the driving cylinder corresponds to the driving groove, and then the piston rod is moved into the driving groove. At this time, the driving rod, the driving cylinder and the first mounting shaft 41 are driven to rotate by the rotation of the motor, and then the position of the separation hole on the sealing plate 43 is adjusted.

[0045] Reference Figures 1 to 6 The second separation assembly 2 includes a third separation plate 21 and a fourth separation plate 22. The third separation plate 21 and the fourth separation plate 22 are both arranged vertically. In the initial state, the first separation plate 12 and the second separation plate 13 are also arranged vertically. The first separation plate 12 and the third separation plate 21 are arranged in parallel and spaced apart. At this time, a cleaning channel 05 is formed between the first separation plate 12 and the third separation plate 21, and a cleaning channel 05 is also formed between the second separation plate 13 and the fourth separation plate 22. When the first separation plate 12 and the second separation plate 13 rotate in a direction toward each other, the third separation plate 21 and the fourth separation plate 22 can still process the flue gas. At this time, solid particles in the flue gas will adhere to the surfaces of the third separation plate 21 and the fourth separation plate 22. Then, after the first separation plate 12 and the second separation plate 13 are reset, the solid particles on the third separation plate 21 and the fourth separation plate 22 are in the cleaning channel 05. A cleaning assembly 8 is provided in the flue gas duct 02. Two cleaning assemblies 8 are provided, and the two cleaning assemblies 8 clean the solid particles in the two cleaning channels 05 respectively.

[0046] Reference Figures 1 to 6The cleaning assembly 8 includes a cleaning cylinder 81 fixed on the flue gas duct 02 and a cleaning plate 82 slidably connected to the cleaning channel 05. The cleaning plate 82 is fixed on the piston rod of the cleaning cylinder 81, and one side of the cleaning plate 82 abuts on the surface of the blocking plate 43, and the other side abuts on the third separation plate 21. At the same time, a cleaning port 014 is opened on the mounting sleeve 11, and the cleaning port 014 is also opened on the first adjusting ring 31 and the second adjusting ring 32, and the length of the cleaning port 014 is less than the length of the first adjusting ring 31 and the second adjusting ring 32. When the first separation plate 12 and the second separation plate 13 are both vertically arranged, the cleaning channel 05, the cleaning port 014 and the interior of the mounting sleeve 11 are connected; a sealing component 9 is slidably connected to the mounting sleeve 11, and the sealing component 9 is used to seal the cleaning port 014, and then when the cleaning plate 82 does not move, the cleaning port 014 is in a blocked state, and then when the cleaning plate 82 moves, the cleaning port 014 is opened, so that the cleaning plate 82 can push the solid particles into the mounting sleeve 11, and finally enter the collection box 51 through the suction component 5.

[0047] Reference Figures 1 to 6 The sealing assembly 9 includes an arc-shaped sealing plate 91 sliding on the mounting sleeve 11 and a sealing spring 92 fixed on the arc-shaped sealing plate 91. One end of the sealing spring 92 is fixed on the mounting sleeve 11, and the other end is fixed on the arc-shaped sealing plate 91. The sealing spring 92 is used to push the arc-shaped sealing plate 91 to seal the cleaning port 014; a cleaning groove 011 is provided on the cleaning plate 82, the opening of which is facing the arc-shaped sealing plate 91. At the same time, a pushing surface 012 is provided on the side of the cleaning plate 82 close to the arc-shaped sealing plate 91, and an inclined surface 013 is provided on the end of the arc-shaped sealing plate 91 away from the sealing spring 92 for abutting against the pushing surface 012. When the first separation plate 12 and the second separation plate 13 after cleaning are rotated to the initial state, the first separation plate 12 and the third separation plate 21 are arranged in parallel. At this time, the smoke is cleaned by the first separation plate 12 and the second separation plate 13. Filtering is carried out, and then the cleaning cylinder 81 moves to drive the cleaning plate 82 to move. The movement of the cleaning plate 82 will scrape the solid particles on the surface of the blocking plate 43 and the surface of the second separation plate 13; when the cleaning plate 82 moves, the pushing surface 012 will abut against the inclined surface 013, and then when the cleaning plate 82 continues to move, it will push the arc sealing plate 91 to rotate. At this time, the sealing spring 92 is in a compressed state, and the opening of the cleaning groove 011 moves into the mounting sleeve 11, which makes it easier to clean the solid particles in the cleaning groove 011 through the suction component 5. At this time, the cleaning port 014 continues to be blocked by the cleaning plate 82, which will not affect the operation of the first separation plate 12 and the second separation plate 13, and then when the cleaning plate 82 moves in the opposite direction, the sealing spring 92 will push the arc sealing plate 91 to move in the opposite direction, and finally the cleaning port 014 is re-blocked by the arc sealing plate 91.

[0048] The implementation principle of a condensing steam boiler with an external superheater in an embodiment of the present application is: in the initial state, when the flue gas is processed, the first separation plate 12 and the second separation plate 13 are both in a vertical state, and then the flue gas generated by the steam boiler enters the flue gas duct 02, and the solid particles in the flue gas pass through the first separation plate 12 and the second separation plate 13 and adhere to the surface of the first separation plate 12 and the second separation plate 13.

[0049] When it is necessary to clean the solid particles on the first separation plate 12 and the second separation plate 13, the first separation plate 12 and the second separation plate 13 are directly rotated in opposite directions, and finally the first separation plate 12 and the second separation plate 13 are rotated to a horizontal state, and the flue gas is continued to be separated by the third separation plate 21 and the fourth separation plate 22. At this time, a storage channel 07 is formed between the first separation plate 12 and the second separation plate 13 and the inner wall of the flue gas pipe 02, and the first discharge port 03 is opened at the same time. The suction component 5 cleans the solid particles in the storage channel 07 through the mounting sleeve 11 and the first discharge port 03, thereby achieving the purpose of cleaning and separating at the same time. In addition, the purpose of not stopping the machine when cleaning the solid particles is achieved, and thus it is more convenient to clean the solid particles in the flue gas pipe 02.

[0050] Example 2:

[0051] Reference Figures 7 to 10 A superheater 10 is provided on the steam boiler body 01. The superheater 10 includes a heat exchange box 101 arranged in the convection tail furnace body and a serpentine fin heat exchange tube 102 arranged in the heat exchange box 101. In other embodiments, the superheater 10 can also be independently arranged at the flue gas outlet of the steam boiler body 01; when the superheater 10 is independently arranged outside the furnace body, the difficulty of maintenance and replacement of the superheater 10 will be greatly reduced.

[0052] Reference Figures 7 to 10 The heat exchange box 101 is provided with a smoke inlet 103 and a smoke outlet 104, the smoke inlet 103 is connected to the water pipe on the steam boiler body 01, and the heat exchange box 101 is provided with an inlet header 105 and a collection header 106. The saturated steam enters the inlet header 105 through the connecting pipe of the steam boiler body 01, and is distributed by the inlet header 105 to enter the serpentine fin heat exchange tube 102. The saturated steam is fully heat-exchanged with the flue gas entering the heat exchange box 101 to become superheated steam, and then enters from the collection header 106 on the superheater 10, and finally enters the gas transmission pipeline through the collection header 106. Since the heat exchange tubes 102 on the superheater 10 use large-diameter finned tubes, the number of joints welded between the tubes and the headers is reduced, and the risk of leakage caused by welding quality is reduced. In addition, the use of finned tubes greatly increases the heating area of ​​the superheater 10, further reducing costs.

[0053] Reference Figures 7 to 10The superheater 10 is suitable for a steam boiler body 01 with a superheated steam temperature of ≤300°C. The provided superheater 10 adopts a large-diameter external finned tube structure with a tube diameter of ≥42mm. Due to the low flue gas temperature, the tube material is 20# carbon steel. The finned tube structure can increase the area by 8-10 times compared to a bare tube. When the flue gas temperature at the design position of the superheater 10 is <400°C, it can be arranged in the steam boiler body 01 at the convection tail, or it can be arranged independently at the flue gas outlet of the steam boiler body 01.

[0054] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A condensing steam boiler with an external superheater, comprising a steam boiler body and a flue gas duct arranged on the steam boiler body, characterized in that: A first separation component for separating solid particles in the flue gas is arranged in the flue gas duct, the first separation component comprises a mounting sleeve arranged in the flue gas duct, a first separation plate and a second separation plate rotatably connected to the flue gas duct, and a second separation component is also arranged in the flue gas duct; a plugging component for plugging the first separation plate and the second separation plate is arranged on both the first separation plate and the second separation plate, a first discharge port is arranged on the mounting sleeve, and an adjusting component for plugging the first discharge port is arranged on the first separation plate; when the first separation plate and the second separation plate are both rotated to a horizontal state, a storage channel is formed between the first separation plate and the second separation plate, and the first separation plate and the second separation plate are in In the blocked state, the first discharge port is opened, and the second separation component continues to separate the flue gas, and an intake component for adsorbing solid particles attached to the first separation plate and the second separation plate is provided on the flue gas duct; the adjustment component includes a first adjustment ring and a second adjustment ring rotatably connected to the flue gas duct, the first separation plate is fixed on the first adjustment ring, and the second separation plate is fixed on the second adjustment ring, and the first adjustment ring and the second adjustment ring are both provided with a second discharge port, when the first separation plate and the second separation plate are in a vertical state, the first discharge port and the second discharge port are staggered, and when the first separation plate and the second separation plate are rotated to a horizontal state, the first discharge port and the second discharge port are correspondingly arranged.

2. A condensing steam boiler with an external superheater according to claim 1, characterized in that: The blocking assembly includes a first mounting shaft rotatably connected to the first separation plate, a second mounting shaft arranged on the first separation plate, and a blocking plate wound around the first mounting shaft and the second mounting shaft. A blocking hole is opened on the blocking plate, a driving assembly for driving the first mounting shaft to rotate is arranged on the flue gas duct, and a reset assembly for driving the second mounting shaft to reset is arranged on the first separation plate. When the blocking hole and the through hole on the first separation plate are misaligned, the first separation plate is in a blocking state.

3. A condensing steam boiler with an external superheater according to claim 2, characterized in that: The reset assembly includes a reset sleeve sleeved on the second mounting shaft and a volute spring arranged between the reset sleeve and the second mounting shaft, one end of the volute spring is fixed on the reset sleeve, and the other end is fixed on the second mounting shaft, and the end of the sealing plate away from the first mounting shaft is wound around the reset sleeve.

4. The condensing steam boiler with an external superheater according to claim 3, characterized in that: The driving assembly includes a driving rod rotatably connected to the flue gas duct, a driving cylinder arranged on the driving rod, and a motor for driving the driving rod to rotate. The piston rod of the driving cylinder is slidably connected to the driving rod, and a driving groove for clamping the piston rod of the driving cylinder is opened on the end face of the first mounting shaft. The cross-sections of the driving cylinder piston rod and the driving groove are both set to be polygonal.

5. The condensing steam boiler with an external superheater according to claim 4, characterized in that: The second separation component includes a third separation plate and a fourth separation plate arranged vertically. A cleaning component for cleaning solid particles on the second separation component is arranged in the flue gas duct. The cleaning component includes a cleaning plate slidably connected between the first separation plate and the second separation plate and a cleaning cylinder fixed on the flue gas duct. The cleaning cylinder is used to drive the cleaning plate to move between the first separation plate and the second separation plate. A cleaning port is opened on the mounting sleeve. The cleaning plate pushes the solid particles into the mounting sleeve through the cleaning port. A sealing component for sealing the cleaning port is arranged on the mounting sleeve.

6. The condensing steam boiler with an external superheater according to claim 5, characterized in that: The sealing assembly comprises an arc-shaped sealing plate slidably connected to the mounting sleeve and a sealing spring fixed on the arc-shaped sealing plate. The sealing spring is used for pushing the arc-shaped sealing plate to seal the cleaning port.

7. The condensing steam boiler with an external superheater according to claim 6, characterized in that: A cleaning groove is provided on the cleaning plate, a pushing surface is provided on the cleaning plate, and an inclined surface for contacting with the pushing surface is provided on the arc-shaped sealing plate.

8. The condensing steam boiler with an external superheater according to claim 1, characterized in that: A superheater is arranged on the steam boiler body, and the superheater comprises a heat exchange box arranged in the convection tail furnace body and a serpentine fin heat exchange tube arranged in the heat exchange box body. A smoke inlet and a smoke outlet are opened on the heat exchange box body, and the smoke inlet is connected to the smoke exhaust pipe on the steam boiler body. An inlet header and a collection header are arranged on the heat exchange box body.

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