Waste heat power generation system of furnace gas of fluidized bed furnace for preparing sulfuric acid

Abstract

The invention relates to the technical field of waste heat power generation, and discloses a waste heat power generation system of furnace gas of a fluidized bed furnace for preparing sulfuric acid, which comprises a condensing tower, the condensing tower comprises a tower body, a spraying assembly is arranged in the tower body, a cold water tank is arranged at the bottom of the tower body, and the cold water tank is connected with a condensing inner pipe in a condenser through a liquid outlet at the bottom; the other end of the condensation inner pipe is connected with the spraying assembly. The air cylinder drives the rotating shaft to move downwards, the rotating shaft pushes the straight pipe through the push plate, the radian between the straight pipe and the arc-shaped corrugated pipe is reduced, the passing resistance of steam is reduced, and mine dust and acid liquor are prevented from being retained in the arc-shaped corrugated pipe. Along with continuous downward movement of the rotating shaft, the rotating shaft drives the straight pipe to move downwards through the push plate and the pipe sleeve, the arc-shaped corrugated pipe is compressed in a manner that the straight pipe moves downwards, the arc-shaped corrugated pipe is promoted to retract, and then residual acid liquor at a folding gap of the arc-shaped corrugated pipe is extruded out and discharged out of the U-shaped outer pipe along with condensate; and the arc-shaped corrugated pipe is prevented from being corroded by residual acid liquor at the folding gaps in the arc-shaped corrugated pipe.

Description

Technical Field

[0001] This invention relates to the field of waste heat power generation technology, and more specifically to a waste heat power generation system for the furnace gas of a fluidized bed furnace used in the preparation of sulfuric acid. Background Technology

[0002] A fluidized bed roaster, also known as a fluidized bed calciner or fluidized bed roaster, is an industrial equipment that utilizes solid fluidization technology for roasting sulfide ores. In the production of sulfuric acid in a fluidized bed roaster, pyrite reacts with air at high temperatures to produce sulfur dioxide gas and solid residue. The furnace gas is then connected to a power generation cycle, causing high-temperature, high-pressure superheated steam to be transported to a steam turbine. The turbine converts the thermal energy of the steam into mechanical energy, which is then used to generate electricity. The exhaust steam from the turbine enters a condenser and is condensed into water by cooling water. The condensate then passes through a deaerator to remove oxygen, is pressurized by a feedwater pump, and is sent back to the economizer and waste heat boiler to begin a new cycle.

[0003] The following technical problems exist in the process of condensing furnace gas in the condenser;

[0004] First, the main components of the furnace gas are sulfur dioxide, oxygen, and nitrogen, as well as impurities such as mineral dust. The condenser tubes are typically U-shaped. Due to the curvature at the bend of the U-shaped tube, mineral dust in the furnace gas easily accumulates there, affecting the normal discharge of condensate and causing blockage of the condenser tubes.

[0005] Secondly, after the flue gas from the generator enters the condenser, it condenses into a liquid state. At this time, acidic gases such as sulfur dioxide and sulfur trioxide in the flue gas condense into acid liquid upon cooling. When the acid liquid passes through the U-shaped tube, it is easy to remain in the bend, which in turn causes strong corrosion to the metal material of the bend of the condenser tube, shortening the equipment life. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a waste heat power generation system for the furnace gas of a fluidized bed furnace used in the preparation of sulfuric acid.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A waste heat power generation system for the flue gas from a fluidized bed furnace used in sulfuric acid production includes a condenser tower. The condenser tower includes a tower body and a wind tunnel at the top of the tower body. A fan assembly is installed inside the wind tunnel. A spray assembly is installed inside the tower body. A cold water tank is installed at the bottom of the tower body. The cold water tank is connected to an inner condenser tube in a condenser through a drain port at the bottom. The other end of the inner condenser tube is connected to the spray assembly. Packing material is installed inside the tower body, and the packing material is located between the spray assembly and the cold water tank. The nozzles in the spray assembly face the packing material. An air inlet is installed on the side wall of the tower body. A U-shaped outer tube is installed inside the condenser. The flue gas from the fluidized bed furnace, after being used for power generation, is introduced into the U-shaped outer tube. The inner condenser tube is placed inside the U-shaped outer tube. The U-shaped outer tube includes a straight tube and an arc-shaped corrugated tube. The condenser includes a shell and a groove opened at the top of the shell. The straight tube slides inside the groove. A liftable U-shaped frame is installed on the shell. A rotating shaft is connected to the top of the U-shaped frame. Push plates are installed on both sides of the rotating shaft. The push plates are connected to a tube sleeve, which is fitted onto the straight tube.

[0009] Preferably, a V-shaped shaping plate is installed inside the housing, and a central fixing ring is installed on the arc-shaped corrugated pipe, with the arc-shaped corrugated pipe connected to the V-shaped shaping plate through the central fixing ring.

[0010] Preferably, a fixing frame is installed inside the housing, a cylinder is installed at the bottom of the fixing frame, and the output end of the cylinder is connected to a U-shaped frame; a spring is installed on the top of the housing, and a pressure plate is installed on the spring.

[0011] Preferably, an annular groove is formed inside the sleeve, a rubber sleeve is installed inside the annular groove, and a flexible hose is installed on the straight pipe, with the flexible hose located inside the sleeve.

[0012] Preferably, a strip groove is formed on the sleeve, a slider is installed on the push plate, the slider is slidably engaged with the strip groove, the push plate is rotatably connected with the push block, and the push block is slidably installed inside the sleeve; when the push plate drives the push block to push the rubber sleeve to squeeze the arc-shaped corrugated pipe, the arc-shaped corrugated pipe protrudes from the inner wall of the straight pipe.

[0013] Preferably, the fan assembly includes a motor fixedly installed at the top of the tower, the motor being connected to a fan, and the fan being placed inside the fan casing.

[0014] Preferably, the condensation tower is equipped with a foam trapping material, which is located at the top of the spray assembly.

[0015] The beneficial effects of this invention are:

[0016] (1) In this invention, the U-shaped frame and the rotating shaft are driven to move down synchronously by the cylinder. As the rotating shaft moves down, the rotating shaft pushes the straight pipes on both sides of the arc-shaped corrugated pipe through the push plate, reducing the curvature between the straight pipe and the arc-shaped corrugated pipe, reducing the resistance to steam passage, and preventing mineral dust and acid liquid from being trapped in the arc-shaped corrugated pipe.

[0017] (2) In this invention, the U-shaped frame and the rotating shaft are continuously driven to move down by the cylinder. The rotating shaft contacts the pressure plate. As the rotating shaft moves down, the rotating shaft drives the pressure plate to move down synchronously. At this time, the rotating shaft drives the straight pipe to move down through the push plate and the sleeve. The straight pipe is compressed by moving down, causing the arc-shaped corrugated pipe to shrink back. This squeezes out the acid liquid remaining in the gap of the arc-shaped corrugated pipe and discharges it with the condensate from the U-shaped outer pipe, preventing the acid liquid remaining in the gap inside the arc-shaped corrugated pipe from corroding the arc-shaped corrugated pipe.

[0018] (3) In the process of pushing the straight pipe by the push plate, the push plate first pushes the rubber sleeve to move by the push block. The rubber sleeve pushes the hose, causing the hose inside the straight pipe to bulge. As the curvature between the straight pipe and the arc-shaped corrugated pipe changes, the bulging hose inside the straight pipe contacts the condenser inner pipe in advance. The hose and rubber sleeve are used for buffering to avoid the rigid collision between the inner wall of the straight pipe and the condenser inner pipe, which would lead to leakage of the condenser inner pipe. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the overall structure of the condenser;

[0022] Figure 3 This is a schematic diagram of the internal structure of the shell;

[0023] Figure 4 This is a schematic diagram of the overall structure of the U-shaped outer tube;

[0024] Figure 5 This is a schematic diagram of the connection structure between the straight pipe and the sleeve;

[0025] Figure 6 This is a schematic diagram of the internal structure of the sleeve;

[0026] Figure 7 This is a schematic diagram of the disassembled structure of the sleeve, push block, and push plate;

[0027] Figure 8 This is a schematic diagram of the disassembled structure of the tube sleeve and rubber sleeve;

[0028] Figure 9 This is a schematic diagram of the disassembled structure of the U-shaped outer tube and the condenser inner tube.

[0029] In the diagram: 1. Condensation tower; 101. Tower body; 102. Air duct; 103. Cold water tank; 104. Air inlet; 105. Drain outlet; 3. Fan assembly; 301. Motor; 302. Fan; 4. Desiccant packing; 5. Packing; 6. Condenser; 601. Shell; 602. V-shaped shaping plate; 603. Central fixing ring; 604. Slide groove; 7. Spray assembly; 8. U-shaped outer pipe; 801. Straight pipe; 802. Arc-shaped corrugated pipe; 803. Flexible hose; 9. Condensation inner pipe; 10. Cylinder; 11. Fixing frame; 12. U-shaped frame; 13. Spring; 14. Pressure plate; 15. Rotating shaft; 16. Push plate; 17. Pipe sleeve; 18. Ring groove; 19. Rubber sleeve; 20. Push block; 21. Strip groove; 22. Sliding block. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1-9 As shown, this invention is a waste heat power generation system for the boiler gas of a fluidized bed furnace used in the preparation of sulfuric acid. It includes a condenser tower 1, which comprises a tower body 101 and a wind tunnel 102 at the top of the tower body 101. A fan assembly 3 is installed inside the wind tunnel 102. A spray assembly 7 is installed inside the tower body 101. A cold water tank 103 is installed at the bottom of the tower body 101. The cold water tank 103 is connected to one end of a condenser inner tube 9 in a condenser 6 via a drain port 105 at the bottom. The other end of the condenser inner tube 9 is connected to the spray assembly 7. Packing material 5 is installed inside the tower body 101, and the packing material 5 is located between the spray assembly 7 and the cold water tank 103. The nozzles in the spray assembly 7 face the packing material 5. An air inlet 104 is installed on the side wall of the tower body 101; a U-shaped outer tube 8 is installed inside the condenser 6. The furnace gas of the fluidized bed furnace is introduced into the U-shaped outer tube 8 after being generated by electricity. The condenser inner tube 9 is placed inside the U-shaped outer tube 8. The U-shaped outer tube 8 includes a straight tube 801 and an arc-shaped corrugated tube 802. The condenser 6 includes a shell 601 and a sliding groove 604 opened on the top of the shell 601. The straight tube 801 slides inside the sliding groove 604. A liftable U-shaped frame 12 is installed on the shell 601. The top of the U-shaped frame 12 is connected to a rotating shaft 15. Push plates 16 are installed on both sides of the rotating shaft 15. The push plates 16 are connected to a pipe sleeve 17. The pipe sleeve 17 is fitted on the straight tube 801.

[0032] A V-shaped shaping plate 602 is installed inside the housing 601, and a central fixing ring 603 is installed on the arc-shaped corrugated pipe 802. The arc-shaped corrugated pipe 802 is connected to the V-shaped shaping plate 602 through the central fixing ring 603. Specifically, a fixing frame 11 is installed inside the housing 601, and a cylinder 10 is installed at the bottom of the fixing frame 11. The output end of the cylinder 10 is connected to a U-shaped frame 12. A spring 13 is installed at the top of the housing 601, and a pressure plate 14 is installed on the spring 13.

[0033] The fan assembly 3 includes a motor 301 fixedly installed on the top of the tower body 101, the motor 301 is connected to a fan 302, and the fan 302 is located inside the fan duct 102. Specifically, a desiccant packing 4 is installed inside the condensation tower 1, and the desiccant packing 4 is located on top of the spray assembly 7.

[0034] The power generation cycle system: The furnace gas produced by the fluidized bed furnace in the preparation of sulfuric acid is fed into the power generation cycle system, where the steam turbine converts the thermal energy of the high-temperature and high-pressure superheated steam into mechanical energy, and then the power generation equipment converts the mechanical energy into electrical energy.

[0035] The exhaust steam discharged from the power generation cycle system is passed into the U-shaped outer pipe 8, and the steam is condensed into water by the condenser inner pipe 9 inside the U-shaped outer pipe 8. The condensate is then deoxygenated by the deaerator, and then pressurized by the feed water pump and sent back to the fluidized bed boiler.

[0036] Condensation cycle: Cool water in the cold water tank 103 is sent into the condenser inner tube 9 through the drain port 105. The cool water in the condenser inner tube 9 exchanges heat with the steam inside the U-shaped outer tube 8, causing the condenser inner tube 9 to discharge hot water. Then, the hot water is introduced into the spray assembly 7. The hot water is sprayed downward onto the packing 5 through the nozzles of the spray assembly 7. At the same time, the motor 301 drives the fan 302 to rotate, causing the external cold air to enter the tower body 101 through the cold water tank 103. The cold air is introduced upward into the packing 5. The cold air and hot water exchange heat in the packing 5. The cooling water generated by the heat exchange enters the cold water tank 103. The hot air generated by the heat exchange is discharged from the condenser tower 1 through the air duct 102.

[0037] Specifically, considering the technical problem of mineral dust and acidic liquid condensing from acidic gases in the furnace gas remaining in the arc-shaped corrugated pipe 802 of the U-shaped outer pipe 8, this invention uses a cylinder 10 to drive the U-shaped frame 12 and the rotating shaft 15 to move downwards synchronously. As the rotating shaft 15 moves downwards, it pushes the straight pipes 801 on both sides of the arc-shaped corrugated pipe 802 through the push plate 16, reducing the curvature between the straight pipes 801 and the arc-shaped corrugated pipe 802, reducing the steam flow resistance, and preventing mineral dust and acid from remaining in the arc-shaped corrugated pipe 802.

[0038] Furthermore, under normal conditions, acid can easily remain in the internal folds of the arc-shaped corrugated pipe 802. To prevent acid from corroding the arc-shaped corrugated pipe 802, this invention uses a cylinder 10 to continuously drive the U-shaped frame 12 and the rotating shaft 15 downwards. The rotating shaft 15 contacts the pressure plate 14. As the rotating shaft 15 moves downwards, it also drives the pressure plate 14 downwards simultaneously. At this time, the rotating shaft 15 drives the straight pipe 801 downwards through the push plate 16 and the pipe sleeve 17. The downward movement of the straight pipe 801 compresses the arc-shaped corrugated pipe 802, causing it to retract and squeeze out the acid remaining in the folds of the arc-shaped corrugated pipe 802. This acid is then discharged from the U-shaped outer pipe 8 along with the condensate, preventing the acid remaining in the internal folds of the arc-shaped corrugated pipe 802 from corroding it.

[0039] It should be noted that the filler 5 of the present invention adopts a four-layer design, using PP material and PVC material respectively, which also has excellent corrosion resistance, giving the filler 5 the hydrophilicity of PP material and the temperature resistance of PVC material.

[0040] See Figures 5-8 An annular groove 18 is formed inside the sleeve 17, and a rubber sleeve 19 is installed inside the annular groove 18. A flexible hose 803 is installed on the straight pipe 801, and the flexible hose 803 is located inside the sleeve 17.

[0041] A strip groove 21 is opened on the sleeve 17, and a slider 22 is installed on the push plate 16. The slider 22 is slidably engaged with the strip groove 21. The push plate 16 is rotatably connected with the push block 20, and the push block 20 is slidably installed inside the sleeve 17. When the push plate 16 drives the push block 20 to push the rubber sleeve 19 to squeeze the arc-shaped corrugated pipe 802, the arc-shaped corrugated pipe 802 protrudes from the inner wall of the straight pipe 801.

[0042] It should be noted that the present invention separates cool water from steam through the U-shaped outer tube 8 and the condenser inner tube 9, preventing the sulfur gas in the steam from contaminating the water circulation system of the condenser inner tube 9.

[0043] Since the inner condenser tube 9 is installed inside the U-shaped outer tube 8, when the pusher plate 16 pushes the straight tube 801, the straight tube 801 changes from a vertical state to an inclined state. The pipe inside the straight tube 801 is very likely to bump into the inner condenser tube 9 built into the U-shaped outer tube 8, causing the inner condenser tube 9 to break and leak, thus contaminating the water circulation system of the inner condenser tube 9.

[0044] Therefore, in the process of pushing the straight pipe 801 by the pusher plate 16, the pusher plate 16 first pushes the rubber sleeve 19 to move through the pusher block 20. The rubber sleeve 19 pushes the hose 803, causing the hose 803 on the inner side of the straight pipe 801 to bulge. As the curvature between the straight pipe 801 and the arc-shaped corrugated pipe 802 changes, the bulging hose 803 on the inner side of the straight pipe 801 contacts the condenser inner pipe 9 in advance. The hose 803 and the rubber sleeve 19 provide buffering to avoid rigid collision between the inner wall of the straight pipe 801 and the condenser inner pipe 9, which would cause the condenser inner pipe 9 to leak.

[0045] The implementation principle of this invention is as follows:

[0046] The power generation cycle system: The furnace gas produced by the fluidized bed furnace in the preparation of sulfuric acid is fed into the power generation cycle system, where the steam turbine converts the thermal energy of the high-temperature and high-pressure superheated steam into mechanical energy, and then the power generation equipment converts the mechanical energy into electrical energy.

[0047] The exhaust steam discharged from the power generation cycle system is passed into the U-shaped outer pipe 8, and the steam is condensed into water by the condenser inner pipe 9 inside the U-shaped outer pipe 8. The condensate is then deoxygenated by the deaerator, and then pressurized by the feed water pump and sent back to the fluidized bed boiler.

[0048] Condensation cycle: Cool water in the cold water tank 103 is pumped into the inner condenser tube 9 by a pressurized pump. The cool water in the inner condenser tube 9 exchanges heat with the steam inside the U-shaped outer tube 8, causing hot water to be discharged from the inner condenser tube 9. Then, the hot water is introduced into the spray assembly 7. The hot water is sprayed downward onto the packing 5 through the nozzles of the spray assembly 7. At the same time, the motor 301 drives the fan 302 to rotate, causing external cold air to enter the tower body 101 through the cold water tank 103. The cold air is then introduced upward into the packing 5. The cold air and hot water exchange heat in the packing 5. The cooling water generated by the heat exchange enters the cold water tank 103. The hot air generated by the heat exchange is discharged from the condensation tower 1 through the air duct 102.

[0049] Specifically, considering the technical problem of mineral dust and acidic liquid condensing from acidic gases in the furnace gas remaining in the arc-shaped corrugated pipe 802 of the U-shaped outer pipe 8, this invention uses a cylinder 10 to drive the U-shaped frame 12 and the rotating shaft 15 to move downwards synchronously. As the rotating shaft 15 moves downwards, it pushes the straight pipes 801 on both sides of the arc-shaped corrugated pipe 802 through the push plate 16, reducing the curvature between the straight pipes 801 and the arc-shaped corrugated pipe 802, reducing the steam flow resistance, and preventing mineral dust and acid from remaining in the arc-shaped corrugated pipe 802.

[0050] Furthermore, under normal conditions, acid can easily remain in the internal folds of the arc-shaped corrugated pipe 802. To prevent acid from corroding the arc-shaped corrugated pipe 802, this invention uses a cylinder 10 to continuously drive the U-shaped frame 12 and the rotating shaft 15 downwards. The rotating shaft 15 contacts the pressure plate 14. As the rotating shaft 15 moves downwards, it also drives the pressure plate 14 downwards simultaneously. At this time, the rotating shaft 15 drives the straight pipe 801 downwards through the push plate 16 and the pipe sleeve 17. The downward movement of the straight pipe 801 compresses the arc-shaped corrugated pipe 802, causing it to retract and squeeze out the acid remaining in the folds of the arc-shaped corrugated pipe 802. This acid is then discharged from the U-shaped outer pipe 8 along with the condensate, preventing the acid remaining in the internal folds of the arc-shaped corrugated pipe 802 from corroding it.

[0051] Specifically, this invention separates cool water from steam using a U-shaped outer pipe 8 and a condenser inner pipe 9, preventing sulfide gases in the steam from contaminating the water circulation system of the condenser inner pipe 9. Since the condenser inner pipe 9 is installed inside the U-shaped outer pipe 8, when the push plate 16 pushes the straight pipe 801, the straight pipe 801 changes from a vertical to an inclined state. The internal pipe of the straight pipe 801 is very likely to bump into the condenser inner pipe 9 built into the U-shaped outer pipe 8, causing damage and leakage to the condenser inner pipe 9, thus contaminating its water circulation system.

[0052] In the process of pushing the straight pipe 801 by the pusher plate 16, the pusher plate 16 first pushes the rubber sleeve 19 to move through the pusher block 20. The rubber sleeve 19 pushes the hose 803, causing the hose 803 on the inner side of the straight pipe 801 to bulge. As the curvature between the straight pipe 801 and the arc-shaped corrugated pipe 802 changes, the bulging hose 803 on the inner side of the straight pipe 801 contacts the condenser inner pipe 9 in advance. The hose 803 and the rubber sleeve 19 provide buffering to avoid rigid collision between the inner wall of the straight pipe 801 and the condenser inner pipe 9, which would cause the condenser inner pipe 9 to leak.

Claims

1. A waste heat power generation system for the furnace gas of a fluidized bed furnace for sulfuric acid preparation, characterized in that, The system includes a condenser tower (1), which includes a tower body (101) and a wind duct (102) at the top of the tower body (101). A fan assembly (3) is installed inside the wind duct (102). A spray assembly (7) is installed inside the tower body (101). A cold water tank (103) is installed at the bottom of the tower body (101). The cold water tank (103) is connected to one end of the condenser inner tube (9) in the condenser (6) through a drain port (105) at the bottom. The other end of the condenser inner tube (9) is connected to the spray assembly (7). A packing material (5) is installed inside the tower body (101), and the packing material (5) is located between the spray assembly (7) and the cold water tank (103). The nozzles in the spray assembly (7) face the packing material (5). An air inlet (104) is installed on the side wall of the tower body (101). The condenser (6) is equipped with a U-shaped outer tube (8). The furnace gas of the boiling furnace is introduced into the U-shaped outer tube (8) after being generated by electricity. The condenser inner tube (9) is placed inside the U-shaped outer tube (8). The U-shaped outer tube (8) includes a straight tube (801) and an arc-shaped corrugated tube (802). The condenser (6) includes a shell (601) and a sliding groove (604) opened on the top of the shell (601). The straight tube (801) slides inside the sliding groove (604). A liftable U-shaped frame (12) is installed on the shell (601). The top of the U-shaped frame (12) is connected to a rotating shaft (15). Push plates (16) are installed on both sides of the rotating shaft (15). The push plates (16) are connected to a sleeve (17). The sleeve (17) is fitted on the straight tube (801).

2. The waste heat power generation system for the flue gas of a boiling furnace for sulfuric acid preparation according to claim 1, characterized in that, A V-shaped shaping plate (602) is installed inside the housing (601), and a central fixing ring (603) is installed on the arc-shaped corrugated pipe (802). The arc-shaped corrugated pipe (802) is connected to the V-shaped shaping plate (602) through the central fixing ring (603).

3. The waste heat power generation system for the flue gas of a boiling furnace for sulfuric acid preparation according to claim 1, characterized in that, A fixing frame (11) is installed inside the housing (601), a cylinder (10) is installed at the bottom of the fixing frame (11), and the output end of the cylinder (10) is connected to the U-shaped frame (12); a spring (13) is installed on the top of the housing (601), and a pressure plate (14) is installed on the spring (13).

4. A waste heat power generation system for the furnace gas of a fluidized bed furnace for sulfuric acid preparation according to claim 1, characterized in that, An annular groove (18) is formed inside the sleeve (17), a rubber sleeve (19) is installed inside the annular groove (18), a flexible hose (803) is installed on the straight pipe (801), and the flexible hose (803) is located inside the sleeve (17).

5. A waste heat power generation system for the furnace gas of a fluidized bed furnace for sulfuric acid preparation according to claim 4, characterized in that, A strip groove (21) is provided on the sleeve (17), and a slider (22) is installed on the push plate (16). The slider (22) is slidably engaged with the strip groove (21). The push plate (16) is rotatably connected with the push block (20), and the push block (20) is slidably installed inside the sleeve (17). When the push plate (16) drives the push block (20) to push the rubber sleeve (19) to squeeze the arc-shaped corrugated pipe (802), the arc-shaped corrugated pipe (802) protrudes from the inner wall of the straight pipe (801).

6. A waste heat power generation system for the furnace gas of a fluidized bed furnace for sulfuric acid preparation according to claim 1, characterized in that, The fan assembly (3) includes a motor (301) fixedly installed on the top of the tower body (101), the motor (301) being connected to a fan (302), and the fan (302) being placed inside the air duct (102).

7. A waste heat power generation system for the furnace gas of a fluidized bed furnace for sulfuric acid preparation according to claim 1, characterized in that, The condenser tower (1) is equipped with a foam trapping material (4), which is located on top of the spray assembly (7).

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