Fragmented combined type cyclone dust removal waste heat boiler for converter flue gas

Abstract

The invention provides a fragmented combined converter flue gas cyclone dust removal waste heat boiler which comprises an outer barrel, an inner barrel and a steam pocket, the outer barrel comprises an upper cylindrical barrel and a lower conical barrel, the inner barrel is arranged in the cylindrical barrel, and a gap is reserved between the outer wall of the inner barrel and the inner wall of the cylindrical barrel to serve as a flue gas channel; the upper end of the outer cylinder is closed; the opening in the upper end of the inner cylinder penetrates through the top of the outer cylinder and is communicated with the outside; a flue gas inlet is formed in the side wall of the cylindrical barrel; a plurality of heat exchange pipes arranged along the arc-shaped barrel wall are arranged in the cylindrical barrel in parallel, the inner barrel is of a structure formed by coiling a spiral heat exchange coil pipe, and water inlets and water outlets of the heat exchange pipes and the spiral heat exchange coil pipe are connected with a steam pocket outside the outer barrel. The waste heat boiler can be suitable for cooling and dust removal of high-temperature and high-dust-content converter flue gas, is efficient and energy-saving, is convenient to transport and mount due to the split combined design of the barrel body, and is not limited by transportation conditions in overall appearance and size.

Description

Technical Field

[0001] The invention belongs to the technical field of dust removal waste heat boilers, and in particular relates to a segmented combined converter flue gas cyclone dust removal waste heat boiler. Background Art

[0002] A waste heat boiler is an energy-saving device that recovers unused heat energy from industrial waste gas, waste liquid or process and converts it into steam or hot water. Its core principle is to let the high-temperature flue gas flow through the furnace, waste heat recovery device and smoke pipe system in sequence, and finally transfer the heat energy to the water medium to achieve secondary energy utilization. It is mainly used in the steel industry: such as recovering waste heat from sintering and coking processes; chemical industry: such as recovering waste heat from cracking gas and achieving rapid cooling to reduce dependence on external energy; gas turbine combined cycle: such as using exhaust waste heat to drive steam turbines to generate electricity and improve system efficiency; other industrial scenarios: such as cement kilns, glass melting furnaces and other high-energy-consuming fields.

[0003] There are still some problems with the current waste heat boilers, such as the lack of dust removal function. For the waste heat recovery of high-temperature dusty flue gas, since the flue gas contains a lot of dust, it is easy to adhere to the inner wall of the boiler, affecting the boiler's heat recovery and reducing work efficiency. In addition, the existing converter flue gas cyclone dust removal waste heat boiler uses a membrane water-cooled wall as the cylinder wall of the cyclone dust removal. When the flue gas rotates and flows at a high speed, it horizontally washes the heat exchange tube, causing certain wear on the heat exchange tube wall. Summary of the invention

[0004] Purpose of the invention: In order to solve the defects of the prior art, the present invention provides a segmented combined converter flue gas cyclone dust removal waste heat boiler, which can not only effectively remove dust, but also cool the converter flue gas, extinguish sparks of high-temperature large particles in the flue gas, prevent the combustion and explosion of CO in the flue gas, and cause little wear on the heat exchange tube wall.

[0005] Technical solution: In order to achieve the above-mentioned invention object, the present invention adopts the following technical solution:

[0006] A segmented combined converter flue gas cyclone dust removal waste heat boiler comprises an outer tube, an inner tube and a steam drum, the outer tube comprises an upper cylindrical tube and a lower conical tube, the inner tube is arranged inside the cylindrical tube, and a gap is left between the outer wall of the inner tube and the inner wall of the cylindrical tube as a flue gas passage; the outer tube is closed at the upper end and open at the lower end, the upper and lower ends of the inner tube are both open, and the upper end opening passes through the top of the outer tube to communicate with the outside; a flue gas inlet is provided on the side wall of the cylindrical tube; a plurality of heat exchange tubes arranged along the tube wall are arranged in parallel inside the cylindrical tube, the inner tube is a structure formed by winding a spiral heat exchange coil, and the water inlet and outlet of the heat exchange tube and the spiral heat exchange coil are respectively connected to the steam drum outside the outer tube.

[0007] As a specific implementation scheme, the cylindrical cylinder is divided into pieces along the circumferential direction and are spliced ​​to form a complete cylinder body. The inner side of each 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 up and down and are arranged in parallel.

[0008] As a further option:

[0009] A group of header pipes is provided on the outside of each wall of the cylindrical cylinder, and each group of header pipes includes a first water inlet header pipe and a first water outlet header pipe. The first heat exchange tubes are arranged in parallel up and down on the inner side of each wall of the cylindrical cylinder, and the openings at both ends are respectively connected to the first water inlet header pipe and the first water outlet header pipe.

[0010] Alternatively, a plurality of groups of header pipes are arranged on the outer side of each cylinder wall of the cylindrical cylinder, each group of header pipes includes a first water inlet header pipe and a first water outlet header pipe, and a plurality of first heat exchange pipes are arranged in parallel up and down on the inner side of each arc-shaped cylinder wall of the cylindrical cylinder, and the water inlet and the water outlet of the first heat exchange pipes arranged in parallel are respectively connected to the first water inlet header pipe and the first water outlet header pipe of the same group of header pipes;

[0011] Preferably, a plurality of first heat exchange tubes are arranged on the same horizontal plane along the inner side of each curved cylinder wall of the cylindrical cylinder.

[0012] As a specific implementation scheme, the conical cylinder is divided into pieces along the circumferential direction and are spliced ​​to form a complete cylinder body. The inner side of each 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 up and down, and the water inlet and outlet thereof are respectively connected to the steam drum outside the outer cylinder.

[0013] As a further option:

[0014] A group of header pipes is provided on the outer side of each wall of the conical cylinder, and each group of header pipes includes a second water inlet header pipe and a second water outlet header pipe. Second heat exchange tubes are arranged in parallel up and down on the inner side of each arc-shaped wall of the conical cylinder, and openings at both ends are respectively connected to the second water inlet header pipe and the second water outlet header pipe.

[0015] Alternatively, a plurality of groups of header pipes are arranged on the outer side of each wall of the conical cylinder, each group of header pipes includes a second water inlet header pipe and a second water outlet header pipe, and a plurality of second heat exchange pipes are arranged in parallel up and down on the inner side of each curved wall of the conical cylinder, and the water inlet and the water outlet of the second heat exchange pipes arranged in parallel are respectively connected to the second water inlet header pipe and the second water outlet header pipe of the same group of header pipes;

[0016] Preferably, a plurality of second heat exchange tubes are arranged on the same horizontal plane along the inner side of each wall of the conical cylinder.

[0017] As a specific implementation scheme, the conical cylinder is divided into an upper cylinder and a lower cylinder. The upper cylinder is divided into pieces along the circumferential direction and assembled to form a complete upper cylinder. The inner side of each cylinder wall is provided with a second heat exchange tube arranged along the arc-shaped cylinder wall. The second heat exchange tube is provided in several groups up and down and is arranged in parallel. Its water inlet and water outlet are respectively connected to the steam drum outside the outer cylinder. The design of the heat exchange tube and the header tube is the same as described above. The lower cylinder is a structure formed by winding a spiral heat exchange coil, and its water inlet and water outlet are respectively connected to the steam drum outside the outer cylinder.

[0018] Alternatively, the conical tube as a whole is a structure formed by winding a spiral heat exchange coil, and its water inlet and water outlet are respectively connected to the steam drum outside the outer tube. As a specific implementation scheme, the inner tube is formed by winding a spiral heat exchange coil, and the water inlet of the spiral heat exchange coil is located at the bottom of the inner tube, and the water outlet is located at the top of the inner tube.

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

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

[0021] As a specific implementation scheme, the fluid flowing through the heat exchange tube and the spiral heat exchange coil can be water or other fluid media. The water outlet and water inlet do not necessarily mean that the medium in the tube must be water.

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

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

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

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

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

[0027] As a specific implementation scheme, the outside of the smoke inlet is connected to a smoke inlet section, and the smoke inlet section is connected to the outer cylinder along the tangential direction of the outer cylinder. This design allows the smoke to enter along the tangential direction of the cylindrical cylinder. Since the smoke enters at a high speed, inertia causes the smoke 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 the prior art, the converter flue gas cyclone dust removal waste heat boiler of the present invention can be applied to the cooling and dust removal of high-temperature and high-dust flue gas, such as converter flue gas, electric furnace flue gas, etc., with high efficiency and energy saving. The cylinder is designed in a segmented assembly along the circumferential direction, which is convenient for transportation and installation, and the overall size is not limited by transportation conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the cylinder structure of the waste heat boiler of the present invention.

[0031] Figure 2 This is a diagram of the heat exchange tube and spiral heat exchange coil structure of the waste heat boiler of the present invention and the connection structure with the steam drum.

[0032] Figure 3 It is a schematic diagram (cross-sectional view) of the cylinder structure of the waste heat boiler of the present invention.

[0033] Figure 4 The two-piece combined structure of the cylindrical tube of the waste heat boiler of the present invention (cross-sectional view).

[0034] Figure 5 This is a four-piece combined structure of a cylindrical tube of a waste heat boiler of the present invention (cross-sectional view).

[0035] Figure 6 It is a schematic diagram of the arrangement of the first heat exchange tube and the header tube in the single-piece cylindrical tube of the waste heat boiler of the present invention.

[0036] Figure 7 It is a schematic diagram of the arrangement of the second heat exchange tube and the header tube in the single-piece conical tube of the waste heat boiler of the present invention. DETAILED DESCRIPTION

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

[0038] In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on 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 tube 1, an inner tube 2, a steam drum 3, a flue gas inlet 4, a first water inlet header pipe 5, a first water outlet header pipe 6, a second water inlet header pipe 7, a second water outlet header 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 cylinder. The small opening of the conical cylinder 102 faces downward. The inner cylinder 2 is arranged 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. As a preferred embodiment, the inner cylinder 2 and the cylindrical cylinder 101 and the conical cylinder 102 are arranged on the same central axis. A top cover 9 is provided on the top of the cylindrical cylinder 101, and the upper end is closed by the top cover 9. The upper and lower ends of the inner cylinder 2 are open, and the upper end opening passes through the top cover 9 to communicate with the outside world. The upper end opening is used to discharge flue gas, and the side wall of the inner cylinder 2 is sealed 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] A plurality of heat exchange tubes arranged along the arc-shaped tube wall are arranged in parallel inside the cylindrical tube 101 and the conical tube 102. The heat exchange tubes are arranged in the horizontal direction and are arranged in a plurality of groups from top to bottom. The inner tube 2 is a structure formed by winding a spiral heat exchange coil. The water inlet and the water outlet of the heat exchange tube and the spiral heat exchange coil are respectively connected to the steam drum 3 outside the outer tube 1, and a forced circulation pump 10 is provided on the pipeline connecting the water inlet and the steam drum 3. As a specific scheme:

[0043] The cylindrical tube 101 is divided into pieces along the circumferential direction and assembled into a complete tube body. The inner side of each tube wall is provided with a first heat exchange tube 1011 arranged along the arc tube wall. The first heat exchange tube 1011 is arranged in several groups up and down and is arranged in parallel. Figure 4 As shown, the four-piece combined structure is as follows Figure 5 As shown, such a number is only set to clearly illustrate the technical solution of the present invention. The number of slices can be set arbitrarily according to the requirements of the use environment, transportation conditions, etc.

[0044] As a solution, a group of header pipes is arranged on the outside of each wall of the cylindrical barrel 101, and the group of header pipes includes a first water inlet header pipe 5 and a first water outlet header pipe 6. The first heat exchange tube 1011 is arranged on the inside of each wall of the cylindrical barrel 101, and its two end openings are respectively connected to the first water inlet header pipe 5 and the first water outlet header pipe 6. The arrangement of the first heat exchange tube 1011 and the header pipe in the single cylindrical barrel 101 is as follows: Figure 6 shown.

[0045] As another optional scheme, a plurality of groups of collecting tubes are provided on the outer side of each tube wall of the cylindrical tube 101, and the collecting tubes include a first water inlet collecting tube 5 and a first water outlet collecting tube 6. A plurality of first heat exchange tubes 1011 are arranged in parallel along the arc of the tube wall on the same horizontal plane on the inner side of each tube wall of the cylindrical tube 101, and the water inlet and the water outlet of the parallel-arranged first heat exchange tubes 1011 are respectively connected to the first water inlet collecting tube 5 and the first water outlet collecting tube 6 of the same group of collecting tubes.

[0046] The conical cylinder 102 is divided into pieces along the circumferential direction and is assembled into a complete cylinder. The inner side of each cylinder wall is provided with a second heat exchange tube 1021 arranged along the arc-shaped cylinder wall. The second heat exchange tube 1021 is provided with a plurality of groups up and down and is arranged in parallel. Its water inlet and water outlet are respectively connected to the steam drum 3 outside the outer cylinder 1. The two-piece combined structure is as follows Figure 4 As shown, the four-piece combined structure is as follows Figure 5 As shown, such a number is only set to clearly illustrate the technical solution of the present invention. The number of slices can be set arbitrarily according to the requirements of the use environment, transportation conditions, etc.

[0047] As a solution, a group of header pipes are arranged on the outside of each wall of the conical cylinder 102, and the header pipes include a second water inlet header pipe 7 and a second water outlet header pipe 8. The second heat exchange tube 1021 is arranged on the inside of each wall of the conical cylinder 102, and its two end openings are respectively connected to the second water inlet header pipe 7 and the second water outlet header pipe 8. The arrangement of the second heat exchange tube 1021 and the header pipe in the single conical cylinder 102 is as follows: Figure 6 shown.

[0048] As another optional scheme, a plurality of groups of collecting tubes are provided on the outer side of each tube wall of the conical tube 102, and the collecting tubes include a second water inlet collecting tube 7 and a second water outlet collecting tube 8. A plurality of second heat exchange tubes 1021 are arranged on the same horizontal plane on the inner side of each tube wall of the conical tube 102, and the water inlet and the water outlet of the second heat exchange tubes 1021 arranged in parallel are respectively connected to the second water inlet collecting tube 7 and the second water outlet collecting tube 8 of the same group of collecting tubes.

[0049] The design of the cylindrical tube 101 and the conical tube 102 can 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 be divided into an upper tube and a lower tube, the upper tube is arranged in pieces along the circumferential direction, and after splicing, a complete upper tube is formed, and the inner side of each tube wall is provided with a second heat exchange tube 1021 arranged along the arc tube wall. The second heat exchange tube 1021 is arranged in several groups up and down, and is arranged in parallel, and its water inlet and water outlet are respectively connected to the steam drum 3 outside the outer tube 1; the design of the heat exchange tube and the header tube is the same as above. The lower tube is a structure formed by winding a spiral heat exchange coil, and its water inlet and water 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 winding a spiral heat exchange coil as a whole, and its water inlet and water outlet are respectively connected to the steam drum 3 outside the outer tube 1.

[0051] The heat exchange tubes, including the first heat exchange tube 1011 and the second heat exchange tube 1021, may be provided with straight fins on their surfaces to improve the heat exchange efficiency.

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

[0053] A smoke inlet 4 is tangentially arranged on the side wall of the cylindrical barrel 101, and a smoke inlet section 401 is connected to the outside of the smoke inlet 4. The smoke inlet section 401 is connected to the outer barrel 1 along the tangential direction of the outer barrel 1. This design enables smoke to enter along the tangential direction of the cylindrical barrel. Since the smoke enters at a high speed, the inertia enables the smoke to rotate.

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

[0055] After the high-temperature dusty flue gas enters the outer cylinder 1 at high speed from the flue gas inlet section 401, it flows downward in a spiral in the gap between the cylindrical cylinder 101 and the inner cylinder 2 until it enters the conical cylinder 102, and washes 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 in turn. Large particles of dust in the flue gas fall into the dust collector 11 connected to the bottom of the conical cylinder 102 under the combined action of centrifugal force and gravity, and are discharged from the ash outlet after passing through the discharger 12. Small particles of dust and flue gas flow from the inside of the inner cylinder 2 from bottom to top, wash the inner surface of the inner cylinder 2 in a spiral line, and finally flow out from the opening at the top of the inner cylinder 2.

[0056] As the flue gas flows, the outer surfaces of each section of the heat exchange tube and the spiral coil are flushed respectively, and the coil flows through the drum feed water (the feed water is driven from the downcomer by the forced circulation pump 10 and distributed to each section of the heat exchange tube and the spiral coil), there is heat exchange between the flue gas and the feed water, the flue gas is cooled and releases heat, the boiler feed water absorbs heat and generates steam, and the steam-water mixture flows into the drum through the riser, and after steam-liquid separation, the saturated steam is sent out, and the saturated water continues to flow out from the downcomer to participate in the forced circulation.

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

Claims

1. A segmented combined converter flue gas cyclone dust removal waste heat boiler, characterized in that: The invention comprises an outer tube (1), an inner tube (2) and a steam drum (3), wherein the outer tube (1) comprises an upper cylindrical tube (101) and a lower conical tube (102), the inner tube (2) is arranged inside the cylindrical tube (101), and a gap is left between the outer wall of the inner tube (2) and the inner wall of the cylindrical tube (101) as a flue gas passage; the outer tube (1) is closed at the upper end and open at the lower end; the upper and lower ends of the inner tube (2) are both open, and the upper end opening passes through the top of the outer tube (1) and communicates with the outside; a flue gas inlet (4) is provided on the side wall of the cylindrical tube (101); a plurality of heat exchange tubes arranged along the tube wall are arranged in parallel inside the cylindrical tube (101), the inner tube (2) is a structure formed by winding a spiral heat exchange coil, and the water inlet and water outlet of the heat exchange tube and the spiral heat exchange coil are respectively connected to the steam drum (3) outside the outer tube (1).

2. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1 is characterized in that: The cylindrical tube (101) is divided into pieces along the circumferential direction and formed into a complete tube body after being spliced ​​together. The inner side of each tube wall is provided with a first heat exchange tube (1011) arranged along the arc-shaped tube wall. The first heat exchange tube (1011) is arranged in multiple groups up and down and is arranged in parallel.

3. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 2 is characterized in that: A group of header pipes is provided on the outer side of each wall of the cylindrical cylinder (101), and the group of header pipes includes a first water inlet header pipe (5) and a first water outlet header pipe (6); a first heat exchange tube (1011) is provided in parallel up and down along the inner side of each curved wall of the cylindrical cylinder (101), and its openings at both ends are respectively connected to the first water inlet header pipe (5) and the first water outlet header pipe (6). Alternatively, a plurality of groups of header pipes are arranged on the outer side of the cylinder wall of the cylindrical cylinder (101), and each group of header pipes comprises a first water inlet header pipe (5) and a first water outlet header pipe (6). At the same time, a plurality of first heat exchange pipes (1011) are arranged in parallel along the inner side of each curved cylinder wall of the cylindrical cylinder (101), and the water inlets and water outlets of the first heat exchange pipes (1011) arranged in parallel are respectively connected to the first water inlet header pipe (5) and the first water outlet header pipe (6) of the same group of header pipes; Preferably, a plurality of first heat exchange tubes (1011) are arranged on the same horizontal plane along the inner side of each curved wall of the cylindrical tube (101).

4. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1 is characterized in that: The conical cylinder (102) is arranged in pieces along the circumferential direction and is assembled into a complete cylinder body. The inner side of each curved cylinder wall is provided with a second heat exchange tube (1021) arranged along the cylinder wall. The second heat exchange tube (1021) is arranged in a plurality of groups in the upper and lower parts and is arranged in parallel. The water inlet and the water outlet thereof are respectively connected to the steam drum (3) outside the outer cylinder (1).

5. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 4 is characterized in that: A group of header pipes is provided on the outer side of each wall of the conical cylinder (102), and each group of header pipes includes a second water inlet header pipe (7) and a second water outlet header pipe (8). The second heat exchange tube (1021) is arranged in parallel up and down on the inner side of each curved wall of the conical cylinder (102), and its openings at both ends are respectively connected to the second water inlet header pipe (7) and the second water outlet header pipe (8). Alternatively, a plurality of groups of header pipes are arranged on the outer side of each wall of the conical cylinder (102), each group of header pipes comprising a second water inlet header pipe (7) and a second water outlet header pipe (8), and a plurality of second heat exchange pipes (1021) are arranged in parallel on the inner side of each curved wall of the conical cylinder (102), and the water inlets and water outlets of the second heat exchange pipes (1021) arranged in parallel are respectively connected to the second water inlet header pipe (7) and the second water outlet header pipe (8) of the same group of header pipes; Preferably, a plurality of second heat exchange tubes (1021) are arranged on the same horizontal plane along the inner side of each curved cylinder wall of the conical cylinder (102).

6. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1 is characterized in that: The conical cylinder (102) is divided into an upper cylinder and a lower cylinder. The upper cylinder is divided into pieces along the circumferential direction and are assembled to form a complete upper cylinder. The inner side of each cylinder wall is provided with a second heat exchange tube (1021) arranged along the arc-shaped cylinder wall. The second heat exchange tube (1021) is provided in a plurality of groups up and down and is arranged in parallel. The water inlet and the water outlet are respectively connected to the steam drum (3) outside the outer cylinder (1). The lower cylinder is a structure formed by winding a spiral heat exchange coil. The water inlet and the water outlet are respectively connected to the steam drum (3) outside the outer cylinder (1). Alternatively, the conical cylinder (102) as a whole is a structure formed by winding a spiral heat exchange coil, and its water inlet and water outlet are respectively connected to the steam drum (3) outside the outer cylinder (1).

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

8. The segmented combined converter flue gas cyclone dust removal waste heat boiler according to claim 1 is characterized in that: A top cover (9) is provided on the top of the cylindrical tube (101), the upper end opening of the inner tube (2) is connected to the outside through the top cover (9), and the side wall of the inner tube (2) is sealedly connected or in contact with the top cover (9).

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

10. 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 water inlet of the heat exchange tube and the spiral heat exchange coil to the steam drum (3); the outside of the flue gas inlet (4) is connected to a flue gas inlet section (401), and the flue gas inlet section (401) is connected to the outer cylinder (1) along the tangent direction of the outer cylinder (1); and the lower end of the conical cylinder (102) is connected to a dust collector (11).

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