A combined converter flue gas cyclone dust removal waste heat boiler

Abstract

This utility model provides a segmented, modular converter flue gas cyclone dust removal waste heat boiler, comprising an outer cylinder, an inner cylinder, and a steam drum. The outer cylinder includes an upper cylindrical section and a lower conical section. The inner cylinder is located inside the cylindrical section, with a gap between the outer wall of the inner cylinder and the inner wall of the cylindrical section serving as a flue gas passage. The upper end of the outer cylinder is closed, while the lower end is open. Both the upper and lower ends of the inner cylinder are open, with the upper opening passing through the top of the outer cylinder and connecting to the outside. A flue gas inlet is provided on the side wall of the cylindrical section. Several heat exchange tubes are arranged in parallel along the arc-shaped cylinder wall inside the cylindrical section. The inner cylinder has a structure formed by spiral heat exchange coils. The inlets and outlets of the heat exchange tubes and the spiral heat exchange coils are respectively connected to the steam drum outside the outer cylinder. This waste heat boiler is suitable for cooling and dust removal of high-temperature, high-dust converter flue gas. It is highly efficient and energy-saving. The segmented, modular design of the cylinder body facilitates transportation and installation, and the overall dimensions are not limited by transportation conditions.

Description

Technical Field

[0001] This utility model belongs to the technical field of dust removal and waste heat boilers, and specifically relates to a segmented combined converter flue gas cyclone dust removal and waste heat boiler. Background Technology

[0002] Waste heat boilers are energy-saving devices that recover heat energy from industrial waste gas, waste liquid, or processes that were not utilized during manufacturing, converting it into steam or hot water. Their core principle involves allowing high-temperature flue gas to flow sequentially through the furnace, waste heat recovery device, and flue system, ultimately transferring the heat energy to a water medium for secondary energy utilization. They are primarily used in the steel industry for recovering waste heat from sintering and coking processes; the chemical industry for recovering waste heat from pyrolysis gas and achieving rapid cooling, reducing reliance on external energy sources; gas turbine combined cycle systems for using exhaust waste heat to drive steam turbines for power generation, improving system efficiency; and other industrial applications such as cement kilns and glass melting furnaces—high-energy-consuming sectors.

[0003] Current waste heat boilers still have some problems, such as the lack of dust removal function. For waste heat recovery from high-temperature, dusty flue gas, the large amount of dust in the flue gas easily adheres to the inner wall of the boiler, affecting the boiler's heat recovery and reducing its efficiency. Moreover, existing converter flue gas cyclone dust removal waste heat boilers use membrane water-cooled walls as the cylinder walls for cyclone dust removal. When the flue gas rotates and flows at high speed, it laterally scours the heat exchange tubes, causing a certain degree of wear on the heat exchange tube walls. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the defects of the prior art, this utility model provides a segmented combined converter flue gas cyclone dust removal waste heat boiler. This dust removal waste heat boiler not only effectively removes dust, but also cools the converter flue gas, extinguishes sparks for high-temperature large particles in the flue gas, prevents the combustion and explosion of CO in the flue gas, and minimizes wear on the heat exchange tube walls.

[0005] Technical solution: To achieve the above-mentioned objectives, this utility model adopts the following technical solution:

[0006] A segmented, modular converter flue gas cyclone dust removal waste heat boiler includes an outer cylinder, an inner cylinder, and a steam drum. The outer cylinder comprises an upper cylindrical section and a lower conical section. The inner cylinder is located inside the cylindrical section, with a gap between the outer wall of the inner cylinder and the inner wall of the cylindrical section serving as a flue gas passage. The upper end of the outer cylinder is closed, while the lower end is open. Both the upper and lower ends of the inner cylinder are open, with the upper opening passing through the top of the outer cylinder and connecting to the outside. A flue gas inlet is provided on the side wall of the cylindrical section. Several heat exchange tubes are arranged in parallel along the cylinder wall inside the cylindrical section. The inner cylinder has a structure formed by spiral heat exchange coils. The inlets and outlets of the heat exchange tubes and the spiral heat exchange coils are respectively connected to the steam drum outside the outer cylinder.

[0007] As a specific implementation, the cylindrical tube is divided into sections along the circumferential direction and spliced ​​together to form a complete cylinder. Each section of the cylinder wall is provided with a first heat exchange tube arranged along the arc-shaped cylinder wall. Several groups of the first heat exchange tubes are arranged vertically and in parallel.

[0008] As a further option:

[0009] Each cylindrical tube has a set of header pipes on its outer side. Each set of header pipes includes a first inlet header pipe and a first outlet header pipe. The first heat exchange pipes are arranged in parallel on the inner side of each cylindrical tube, and their two ends are respectively connected to the first inlet header pipe and the first outlet header pipe.

[0010] Alternatively, each cylindrical wall of the cylindrical tube is provided with several sets of manifolds on its outer side. Each set of manifolds includes a first inlet manifold and a first outlet manifold. Several first heat exchange tubes are arranged in parallel on the inner side of each arc-shaped cylindrical wall of the cylindrical tube. The inlet and outlet of the parallel first heat exchange tubes are respectively connected to the first inlet manifold and the first outlet manifold of the same set of manifolds.

[0011] Preferably, each arc-shaped section of the cylindrical tube has several first heat exchange tubes arranged on the same horizontal plane along its inner side.

[0012] As a specific implementation, the conical cylinder is divided into sections along the circumferential direction and spliced ​​together to form a complete cylinder. Each section of the cylinder wall is provided with a second heat exchange tube arranged along the arc-shaped cylinder wall. Several groups of the second heat exchange tubes are arranged in parallel, and their inlet and outlet are respectively connected to the steam drum outside the outer cylinder.

[0013] As a further option:

[0014] Each conical cylinder has a set of header pipes on its outer side. Each set of header pipes includes a second inlet header pipe and a second outlet header pipe. The second heat exchange pipes are arranged in parallel on the inner side of each arc-shaped cylinder wall, and their two ends are respectively connected to the second inlet header pipe and the second outlet header pipe.

[0015] Alternatively, each conical cylinder wall has several sets of manifolds on its outer side, each set of manifolds including a second inlet manifold and a second outlet manifold, and several second heat exchange tubes are arranged in parallel on the inner side of each arc-shaped conical cylinder wall. The inlet and outlet of the parallel second heat exchange tubes are respectively connected to the second inlet manifold and the second outlet manifold of the same set of manifolds.

[0016] Preferably, each section of the conical cylinder has several second heat exchange tubes arranged on the same horizontal plane along its inner side.

[0017] In a specific implementation scheme, the conical cylinder is divided into an upper cylinder and a lower cylinder. The upper cylinder is segmented along the circumferential direction and assembled to form a complete upper cylinder. Each segment has a second heat exchange tube arranged along the arc-shaped cylinder wall on its inner side. Several groups of the second heat exchange tubes are arranged vertically and in parallel, with their inlets and outlets connected to the steam drum outside the outer cylinder, respectively. The design of the heat exchange tubes and header tubes is the same as described above. The lower cylinder is a structure formed by spiral heat exchange coils, with its inlet and outlet connected to the steam drum outside the outer cylinder, respectively.

[0018] Alternatively, the conical cylinder may be a structure formed by a spiral heat exchange coil, with its inlet and outlet connected to a steam drum outside the outer cylinder. In a specific embodiment, the inner cylinder is formed by a spiral heat exchange coil, with the inlet of the coil located at the bottom and the outlet at the top.

[0019] As a specific implementation plan, the inlet of the same set of spiral heat exchange coils can be at the top and the outlet can be at the bottom.

[0020] As a specific implementation plan, the same group of spiral heat exchange coils can be a single-head coil or a multi-head coil.

[0021] As a specific implementation, the fluid flowing inside the heat exchange tubes and spiral heat exchange coils can be water or other fluid media. The terms "outlet" and "inlet" do not necessarily mean that the medium inside the tubes is water.

[0022] As a specific implementation plan, the surface of the heat exchange tube is provided with straight fins.

[0023] As a specific implementation, the top of the cylindrical tube is provided with a top cover, the upper end opening of the inner tube passes through the top cover and connects with the outside, and the side wall of the inner tube is sealed to or in contact with the top cover.

[0024] As a specific implementation scheme, the cylindrical tube is a cylindrical body, and the small opening of the conical tube faces downward; the inner tube, the cylindrical tube, and the conical tube are arranged on the same central axis.

[0025] As a specific implementation, the spiral direction of the inner cylinder's spiral heat exchange coil is consistent with the rotation direction of the cyclone formed by the flue gas, which can reduce the wear of dust on the outer surface of the coil wall and facilitate the falling of large dust particles.

[0026] As a specific implementation plan, a forced circulation pump is provided on the pipeline connecting the inlet of the heat exchange tube and the spiral heat exchange coil to the steam drum;

[0027] As a specific implementation, the flue gas inlet is externally connected to a flue gas inlet section, which is connected to the outer cylinder along the tangential direction of the outer cylinder. This design allows the flue gas to enter along the tangential direction of the cylindrical cylinder. Due to the high speed of the flue gas entering, the inertia causes the flue gas to rotate.

[0028] As a specific implementation scheme, a dust collector is connected to the lower end of the conical cylinder.

[0029] Beneficial effects: Compared with existing technologies, this utility model of a converter flue gas cyclone dust removal waste heat boiler is suitable for cooling and dust removal of high-temperature, high-dust-content flue gas, such as converter flue gas and electric furnace flue gas, and is highly efficient and energy-saving. The segmented modular design of the cylinder along the circumferential direction facilitates transportation and installation, and the overall external dimensions are not limited by transportation conditions. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the cylindrical structure of the waste heat boiler of this utility model.

[0031] Figure 2 This diagram shows the structure of the heat exchange tubes and spiral heat exchange coils of the waste heat boiler of this utility model, as well as the connection structure with the steam drum.

[0032] Figure 3 This is a schematic diagram (cross-sectional view) of the cylindrical structure of the waste heat boiler of this utility model.

[0033] Figure 4 This utility model shows a two-piece combined cylindrical structure of a waste heat boiler (cross-sectional view).

[0034] Figure 5 This utility model shows a four-piece combined cylindrical structure of a waste heat boiler (cross-sectional view).

[0035] Figure 6 This is a schematic diagram of the arrangement of the first heat exchange tube and header tube in the single cylindrical shell of the waste heat boiler of this utility model.

[0036] Figure 7 This is a schematic diagram of the arrangement of the second heat exchange tube and header tube in the single conical tube of the waste heat boiler of this utility model. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent.

[0039] Example 1

[0040] Converter flue gas cyclone dust removal waste heat boiler, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes an outer cylinder 1, an inner cylinder 2, a steam drum 3, a flue gas inlet 4, a first water inlet manifold pipe 5, a first water outlet manifold pipe 6, a second water inlet manifold pipe 7, a second water outlet manifold pipe 8, a top cover 9, a forced circulation pump 10, a dust collector 11, and a discharger 12.

[0041] The outer cylinder 1 includes an upper cylindrical cylinder 101 and a lower conical cylinder 102. The upper end of the outer cylinder 1 is closed, and the lower end is open. The cylindrical cylinder 101 is preferably a cylindrical body, and the small opening of the conical cylinder 102 faces downward. The inner cylinder 2 is located inside the cylindrical cylinder 101, and a gap is left between the outer wall of the inner cylinder 2 and the inner wall of the cylindrical cylinder 101 to serve as a flue gas passage. As a preferred embodiment, the inner cylinder 2, the cylindrical cylinder 101, and the conical cylinder 102 are arranged along the same central axis. The top of the cylindrical cylinder 101 is provided with a top cover 9, which closes the upper end. The upper and lower ends of the inner cylinder 2 are open, and the upper opening passes through the top cover 9 to connect with the outside. This upper opening is used to discharge flue gas. The side wall of the inner cylinder 2 is sealed to or in contact with the top cover 9. The lower end of the conical cylinder 102 is connected to a dust collector 11 and a discharger 12.

[0042] Both the cylindrical tube 101 and the conical tube 102 have several heat exchange tubes arranged in parallel along the arc-shaped tube wall. The heat exchange tubes are arranged horizontally and in several groups from top to bottom. The inner tube 2 is a structure formed by spiral heat exchange coils. The inlet and outlet of the heat exchange tubes and the spiral heat exchange coils are connected to the steam drum 3 outside the outer tube 1, and a forced circulation pump 10 is installed on the pipeline connecting the inlet and the steam drum 3. As a specific scheme:

[0043] The cylindrical tube 101 is arranged in sections along the circumference, which are then assembled to form a complete cylinder. Each section has a first heat exchange tube 1011 arranged along the arc-shaped cylinder wall on its inner side. Several groups of the first heat exchange tubes 1011 are arranged vertically and in parallel. The two-section combined structure is as follows: Figure 4 As shown, the four-piece combined structure is as follows Figure 5 As shown, this number is only for the purpose of clearly illustrating the technical solution of this utility model. The number of segments can be arbitrarily set according to the requirements of the usage environment, transportation conditions, etc.

[0044] As one embodiment, each cylindrical section 101 has a set of header pipes on its outer side, including a first inlet header pipe 5 and a first outlet header pipe 6. A first heat exchange tube 1011 is installed on the inner side of each cylindrical section 101, with its two ends connected to the first inlet header pipe 5 and the first outlet header pipe 6, respectively. The arrangement of the first heat exchange tubes 1011 and header pipes in a single cylindrical section 101 is as follows: Figure 6 As shown.

[0045] As an alternative, each cylindrical tube 101 has several sets of manifolds on its outer side. The manifolds include a first inlet manifold 5 and a first outlet manifold 6. On the inner side of each cylindrical tube 101, several first heat exchange tubes 1011 are arranged in parallel along the arc of the tube wall on the same horizontal plane. The inlet and outlet of the parallel first heat exchange tubes 1011 are respectively connected to the first inlet manifold 5 and the first outlet manifold 6 of the same set of manifolds.

[0046] The conical cylinder 102 is divided into sections along the circumference, which are then assembled to form a complete cylinder. Each section has a second heat exchange tube 1021 arranged along the arc-shaped cylinder wall on its inner side. Several groups of the second heat exchange tubes 1021 are arranged vertically and in parallel, with their inlets and outlets connected to the steam drum 3 outside the outer cylinder 1, respectively. The two-section combined structure is as follows... Figure 4 As shown, the four-piece combined structure is as follows Figure 5 As shown, this number is only for the purpose of clearly illustrating the technical solution of this utility model. The number of segments can be arbitrarily set according to the requirements of the usage environment, transportation conditions, etc.

[0047] As one embodiment, each conical cylinder 102 has a set of header pipes on its outer side, including a second inlet header pipe 7 and a second outlet header pipe 8. A second heat exchange tube 1021 is installed on the inner side of each conical cylinder 102, with its two ends connected to the second inlet header pipe 7 and the second outlet header pipe 8, respectively. The arrangement of the second heat exchange tubes 1021 and header pipes in a single conical cylinder 102 is as follows: Figure 6 As shown.

[0048] As an alternative, each section of the conical cylinder 102 has several sets of manifolds on its outer side. The manifolds include a second inlet manifold 7 and a second outlet manifold 8. Each section of the conical cylinder 102 has several second heat exchange tubes 1021 arranged on the same horizontal plane on its inner side. The inlet and outlet of the parallel-arranged second heat exchange tubes 1021 are connected to the second inlet manifold 7 and the second outlet manifold 8 of the same set of manifolds, respectively.

[0049] The design of the cylindrical tube 101 and the conical tube 102 can be selected from another option, namely, the design of the cylindrical tube 101 is the same as above, and the conical tube 102 can be divided into an upper tube and a lower tube. The upper tube is arranged in sections along the circumferential direction, and after splicing, it forms a complete upper tube. Each section of the tube wall is provided with a second heat exchange tube 1021 arranged along the arc-shaped tube wall. Several groups of second heat exchange tubes 1021 are arranged vertically and in parallel. Their inlet and outlet are respectively connected to the steam drum 3 outside the outer tube 1. The design of the heat exchange tubes and the header tubes is the same as above. The lower tube is a structure formed by spiral heat exchange coils, and its inlet and outlet are respectively connected to the steam drum 3 outside the outer tube 1.

[0050] The design of the cylindrical tube 101 and the conical tube 102 can also be selected from another scheme, that is, the design of the cylindrical tube 101 is the same as above, and the conical tube 102 can also be a structure formed by spiral heat exchange coils, with its inlet and outlet connected to the steam drum 3 outside the outer tube 1 respectively.

[0051] The aforementioned heat exchange tubes include a first heat exchange tube 1011 and a second heat exchange tube 1021, and straight fins can be provided on their surfaces to improve heat exchange efficiency.

[0052] The inner cylinder 2 is formed by a spiral heat exchange coil 201. The water inlet of the spiral heat exchange coil 201 is located at the bottom of the inner cylinder 2, and the water outlet is located at the top of the inner cylinder 2. The spiral direction of the spiral heat exchange coil of the inner cylinder 2 is consistent with the rotation direction of the cyclone formed by the flue gas, which can reduce the wear of dust on the outer surface of the coil wall and facilitate the falling of large dust particles.

[0053] The side wall of the cylindrical tube 101 is provided with a flue gas inlet 4 tangentially. The flue gas inlet 4 is connected to the outside of the flue gas inlet section 401. The flue gas inlet section 401 is connected to the outer tube 1 along the tangential direction of the outer tube 1. This design allows the flue gas to enter along the tangential direction of the cylindrical tube. Due to the high speed of the flue gas entering, the inertia causes the flue gas to rotate.

[0054] The working process and principle of the converter flue gas cyclone dust removal waste heat boiler described above are as follows:

[0055] High-temperature, dust-laden flue gas enters the outer cylinder 1 at high speed through the flue gas inlet section 401. It then flows spirally downwards within the gap between the cylindrical cylinder 101 and the inner cylinder 2, until it reaches the conical cylinder 102, sequentially scouring the inner surface of the cylindrical cylinder 101, the outer surface of the inner cylinder 2, and the inner surface of the conical cylinder 102. Large dust particles in the flue gas, under the combined action of centrifugal force and gravity, fall into the dust collector 11 connected to the bottom of the conical cylinder 102, and are discharged through the ash outlet after passing through the unloader 12. Small dust particles and flue gas flow upwards from the inside of the inner cylinder 2, spirally scouring the inner surface of the inner cylinder 2, and finally flow out from the opening at the top of the inner cylinder 2.

[0056] As the flue gas flows, it washes the outer surfaces of the heat exchange tubes and spiral coils in each section. The feedwater from the steam drum flows through the coils (the feedwater is distributed to the heat exchange tubes and spiral coils in each section via the forced circulation pump 10 driven by the downcomer). There is heat exchange between the flue gas and the feedwater. The flue gas cools down and releases heat, while the boiler feedwater absorbs heat to generate steam. The steam-water mixture flows into the steam drum through the riser. After steam-liquid separation, the saturated steam is sent out, while the saturated water continues to flow out through the downcomer to participate in the forced circulation.

[0057] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A segmented, modular converter flue gas cyclone dust removal waste heat boiler, characterized in that, The system includes an outer cylinder (1), an inner cylinder (2), and a steam drum (3). The outer cylinder (1) includes an upper cylindrical cylinder (101) and a lower conical cylinder (102). The inner cylinder (2) is located inside the cylindrical cylinder (101), and a gap is left between the outer wall of the inner cylinder (2) and the inner wall of the cylindrical cylinder (101) as a flue gas passage. The upper end of the outer cylinder (1) is closed, and the lower end is open. The upper and lower ends of the inner cylinder (2) are both open, and its upper end opening passes through the top of the outer cylinder (1) and connects to the outside. A flue gas inlet (4) is provided on the side wall of the cylindrical cylinder (101). The cylindrical tube (101) is provided with several heat exchange tubes arranged in parallel along the inner wall. The inner cylinder (2) is a structure formed by spiral heat exchange coils. The inlet and outlet of the heat exchange tubes and the spiral heat exchange coils are respectively connected to the steam drum (3) outside the outer cylinder (1). The cylindrical tube (101) is divided into sections along the circumferential direction and spliced ​​to form a complete cylinder. Each section of the cylinder wall is provided with a first heat exchange tube (1011) arranged along the arc-shaped cylinder wall. Several groups of the first heat exchange tubes (1011) are arranged vertically and in parallel.

2. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1, characterized in that, Each cylindrical tube (101) has a set of header pipes on the outer side of each cylindrical wall, which includes a first inlet header pipe (5) and a first outlet header pipe (6); each arc-shaped cylindrical wall of the cylindrical tube (101) has a first heat exchange tube (1011) arranged in parallel along the inner side, with its two ends connected to the first inlet header pipe (5) and the first outlet header pipe (6) respectively. Alternatively, the outer side of the cylindrical wall of the cylindrical tube (101) is provided with several sets of manifolds, each set of manifolds including a first inlet manifold (5) and a first outlet manifold (6). At the same time, several first heat exchange tubes (1011) are arranged in parallel along the inner side of each arc-shaped cylindrical wall of the cylindrical tube (101). The inlet and outlet of the parallel first heat exchange tubes (1011) are respectively connected to the first inlet manifold (5) and the first outlet manifold (6) of the same set of manifolds.

3. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1, characterized in that, The conical cylinder (102) is divided into sections along the circumference and spliced ​​together to form a complete cylinder. Each section of the arc-shaped cylinder wall is provided with a second heat exchange tube (1021) arranged along the cylinder wall. Several groups of the second heat exchange tubes (1021) are arranged vertically and in parallel. Their inlet and outlet are respectively connected to the steam drum (3) outside the outer cylinder (1).

4. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 3, characterized in that, Each conical cylinder (102) has a set of header pipes on the outer side of each cylinder wall. Each set of header pipes includes a second inlet header pipe (7) and a second outlet header pipe (8). The second heat exchange pipes (1021) are arranged in parallel on the inner side of each arc-shaped cylinder wall of the conical cylinder (102), and their two ends are respectively connected to the second inlet header pipe (7) and the second outlet header pipe (8). Alternatively, each section of the conical cylinder (102) has several sets of manifolds on its outer side. Each set of manifolds includes a second inlet manifold (7) and a second outlet manifold (8). Several second heat exchange tubes (1021) are connected in parallel on the inner side of each arc-shaped section of the conical cylinder (102). The inlet and outlet of the parallel second heat exchange tubes (1021) are connected to the second inlet manifold (7) and the second outlet manifold (8) of the same set of manifolds, respectively.

5. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1, characterized in that, The conical cylinder (102) is divided into an upper cylinder and a lower cylinder. The upper cylinder is divided into sections along the circumferential direction and spliced ​​together to form a complete upper cylinder. Each section of the cylinder wall is provided with a second heat exchange tube (1021) arranged along the arc-shaped cylinder wall. Several groups of the second heat exchange tubes (1021) are arranged vertically and in parallel. Their inlet and outlet are respectively connected to the steam drum (3) outside the outer cylinder (1). The lower cylinder is a structure formed by spiral heat exchange coils. Its inlet and outlet are respectively connected to the steam drum (3) outside the outer cylinder (1). Alternatively, the conical cylinder (102) is a structure formed by a spiral heat exchange coil, with its inlet and outlet connected to the steam drum (3) outside the outer cylinder (1).

6. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1, characterized in that, The inner cylinder (2) is formed by a spiral heat exchange coil (201) with the inlet of the spiral heat exchange coil (201) located at the bottom of the inner cylinder (2) and the outlet located at the top of the inner cylinder (2).

7. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1, characterized in that, The top of the cylindrical tube (101) is provided with a top cover (9), the upper opening of the inner tube (2) passes through the top cover (9) and communicates with the outside, and the side wall of the inner tube (2) is sealed to or in contact with the top cover (9).

8. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1, characterized in that, The spiral direction of the inner cylinder (2) is consistent with the rotation direction of the cyclone formed by the flue gas; the cylindrical cylinder (101) is a cylindrical body, and the small opening of the conical cylinder (102) faces downward; the inner cylinder (2), the cylindrical cylinder (101), and the conical cylinder (102) are arranged on the same central axis; the surface of the heat exchange tube is provided with straight fins.

9. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1, characterized in that, A forced circulation pump (10) is provided on the pipeline connecting the inlet of the heat exchange tube and the spiral heat exchange coil to the steam drum (3); a flue gas inlet section (401) is connected to the outside of the flue gas inlet (4), and the flue gas inlet section (401) is connected to the outer cylinder (1) along the tangential direction of the outer cylinder (1); a dust collector (11) is connected to the lower end of the conical cylinder (102).

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