High temperature sour gas recovery booster blower

Abstract

The application relates to a high-temperature acid flue gas recovery pressurizing blower and relates to the technical field of flue gas treatment. The blower comprises a whole pedestal and a blower shell, the blower shell is installed in the inside of the whole pedestal, a main shaft is rotationally connected in the inside of the blower shell, a floating end supporting leg capable of sliding in a plane is arranged on the bottom wall of the blower shell, a circular hole is formed in the floating end supporting leg, a floating end positioning and pressing sleeve is arranged in the circular hole, a fixed end supporting leg capable of sliding along the center line direction of the blower shell is further arranged on the bottom wall of the blower shell, a waist-shaped hole is formed in the fixed end supporting leg, a fixed end positioning and pressing sleeve is arranged in the waist-shaped hole, and a pressing sleeve pressing plate and a fastener are arranged in the circular hole and the waist-shaped hole. The application has the effects of improving the problem that the connection between the blower shell and the pedestal is broken due to the expansion caused by high-temperature and normal-temperature alternation and improving the safety during the treatment of acid flue gas.

Description

Technical Field

[0001] This application relates to the field of flue gas treatment technology, and in particular to a high-temperature acidic flue gas recovery and pressurization blower. Background Technology

[0002] The production of new rubber materials generates three types of waste. After incineration, these three types of waste produce high-temperature acidic flue gas containing corrosive, toxic, and other dangerous gases. Direct emission into the atmosphere will cause environmental pollution problems.

[0003] In related technologies, blowers are commonly used to recover acidic gases. Existing blowers typically consist of a base and a blower housing, with the housing bolted to the base. Exhaust gas enters the blower through the inlet and is cooled and further transported through channels within the housing. However, this type of blower has the following problems: because the exhaust gas is generated at high temperatures, the alternating high and normal temperatures during its entry into the blower can easily cause the blower housing to expand. Since the blower housing is bolted to the base surface, the expansion caused by the alternating high and normal temperatures can easily lead to breakage of the connection between the blower housing and the base. Furthermore, the distance between the rotor assembly inside the blower and the inner wall of the housing changes continuously due to temperature variations, posing a safety hazard. Therefore, improvements are needed. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a high-temperature acidic flue gas recovery and pressurization blower.

[0005] The high-temperature acidic flue gas recovery and pressurization blower provided in this application adopts the following technical solution: A high-temperature acidic flue gas recovery and pressurization blower includes an integral base and a blower housing. The blower housing is installed inside the integral base. A main shaft is rotatably connected inside the blower housing. A cooling fan is installed on the peripheral wall of the main shaft. A floating end support leg that can slide in a plane is provided on the bottom wall of the blower housing. A circular hole is opened in the floating end support leg, and a floating end positioning and clamping sleeve is provided in the circular hole. A fixed end support leg that can slide along the center line of the blower housing is also provided on the bottom wall of the blower housing. An oblong hole is opened in the fixed end support leg, and a fixed end positioning and clamping sleeve is provided in the oblong hole. A clamping sleeve pressure plate and a fastener are provided in both the circular hole and the oblong hole. The clamping sleeve pressure plate and the fastener are used to limit the movement of the floating end support leg and the fixed end support leg.

[0006] By adopting the above technical solution, using a floating end positioning clamping sleeve, a fixed end positioning clamping sleeve, a clamping sleeve pressure plate, and fasteners, when the blower casing expands due to alternating high and normal temperatures, the floating end support leg can slide in the plane, and the fixed end support leg can slide along the center line of the blower casing. This achieves precise guidance and control of the expansion and contraction position of the casing under alternating high and normal temperature cycles, ensuring that the expansion and contraction of the blower casing and rotor assembly are coordinated. At the same time, it can buffer the connection pressure between the overall base and the blower casing caused by the expansion, thus making the blower safer and more stable during use.

[0007] Optionally, the fastener includes a double-ended stud and a locking nut. The floating end positioning clamping sleeve is circular. The clamping sleeve pressure plate covers the top wall of the floating end positioning clamping sleeve. The installation gap between the clamping sleeve pressure plate and the floating end support leg is 0.05-0.08mm. The floating end positioning clamping sleeve is 0.05-0.08mm thicker than the bottom wall of the floating end support leg. The double-ended stud passes through the clamping sleeve pressure plate and the floating end positioning clamping sleeve and is connected to the overall base. The locking nut is threaded onto the circumferential wall of the double-ended stud located in the circular hole. The locking nut abuts against the clamping sleeve pressure plate. The outer edge of the floating end positioning clamping sleeve has a uniform gap with the inner wall of the circular hole, and the gap between the inner hole and the outer diameter of the double-ended stud is 0.1-0.15mm. The fixed end positioning clamping sleeve is waist-shaped. The fixed end positioning clamping sleeve has an outer waist-shaped outer edge and a circular inner hole. The clamping sleeve pressure plate covers the top wall of the fixed end positioning clamping sleeve. The installation gap between the clamping sleeve pressure plate and the fixed end support leg is 0.05-0.08mm. The thickness of the fixed end positioning clamping sleeve is 0.05-0.08mm higher than the bottom wall of the fixed end support leg. The double-ended stud passes through the clamping sleeve pressure plate and the fixed end positioning clamping sleeve and is connected to the overall base. The locking nut is threaded to the circumferential wall of the double-ended stud located in the waist-shaped hole. The locking nut abuts against the clamping sleeve pressure plate. The installation gap between the outer edge of the fixed end positioning clamping sleeve and the waist-shaped hole along the center line of the blower housing is 0.05-0.08mm, and the gap between the inner hole and the outer diameter of the double-ended stud is 0.05-0.1mm.

[0008] By adopting the above technical solution, the outer edge and inner hole of the floating end positioning clamping sleeve are both circular, the gap between the outer edge and the circular hole of the floating end support leg is uniform, and the gap in any circumferential direction exceeds the maximum expansion of one side of the blower housing. The distance between the inner hole and the outer diameter of the double-ended stud is controlled at 0.1-0.15mm. The height of the floating end positioning clamping sleeve is 0.05-0.08mm higher than the bottom wall thickness of the floating end support leg, ensuring that the floating end support leg can slide freely in the circumferential direction below the clamping sleeve pressure plate after the clamping sleeve pressure plate is installed. The outer edge of the fixed end positioning clamping sleeve is waist-shaped, and the inner hole is circular. The outer edge mates with the waist-shaped mounting hole of the fixed end support leg, and the installation gap along the center line of the blower housing is controlled at 0.05-0.08mm. The gaps at both ends perpendicular to the centerline of the blower housing exceed the maximum expansion of one side of the blower housing. The gap between the inner hole and the outer diameter of the double-ended stud is controlled between 0.05 and 0.1 mm. The height of the clamping sleeve is 0.05 to 0.08 mm higher than the thickness of the bottom wall of the fixed end support leg. This ensures that after the clamping sleeve plate is installed, the fixed end support leg can only slide freely below the clamping sleeve plate along the direction perpendicular to the centerline of the blower housing. The position of the fixed end support leg along the centerline of the blower housing is restricted by the fixed end positioning clamping sleeve. The floating end positioning clamping sleeve and the fixed end positioning clamping sleeve cooperate with each other, so that corresponding displacement can be generated when the blower housing expands, ensuring the stability and safety of the connection between the overall base and the blower housing.

[0009] Optionally, housing end caps are provided at both ends of the main shaft where it passes through the blower housing. The housing end caps abut against the blower housing, and several floating graphite sealing rings are provided at the housing end caps.

[0010] By adopting the above technical solution, the blower casing expands significantly when operating at high temperatures, and the center height of the blower casing varies considerably. Several sets of free-floating graphite sealing rings are installed at the end cover of the casing. At different temperatures, the floating graphite sealing rings can fit tightly with the rotor assembly and the blower casing, sealing the high-temperature flue gas and the isolated nitrogen gas separately to prevent gas leakage.

[0011] Optionally, an expansion slide plate is provided below the end cover of the housing. The expansion slide plate is arranged along the center direction of the blower housing. An expansion slide plate guide seat is provided inside the integral base. The expansion slide plate guide seat is located below the end cover of the housing. The gap between the two sides of the expansion slide plate and the sides of the expansion slide plate guide seat is 0.03-0.05mm. A position sensor is provided inside the expansion slide plate guide seat. The position sensor is used to detect the expansion value of the blower housing and to issue an alarm when the expansion value is abnormal.

[0012] By adopting the above technical solution, when the blower casing expands during operation, the expansion slide will slide synchronously with the blower casing. The value detected by the position sensor can reflect the expansion value of the blower casing. When the expansion value is abnormal, the position sensor will issue an alarm, which will facilitate the operator to stop the operation of the blower, avoid collision between the blower rotor assembly and the blower casing, and ensure safe operation.

[0013] Optionally, a nitrogen storage chamber is provided between several of the floating graphite sealing rings, and the nitrogen storage chamber is connected to a nitrogen pipe, which is equipped with a ball valve.

[0014] By adopting the above technical solution, when the cooling fan is started, the ball valve is opened, and nitrogen is filled into the isolated nitrogen storage chamber through the nitrogen pipe. The internal nitrogen pressure value is higher than the high-temperature flue gas pressure value inside the blower casing, ensuring that the flue gas does not leak out of the blower casing and improving safety.

[0015] Optionally, a labyrinth seal is provided at the junction of the housing end cover and the main shaft to reduce flue gas pressure.

[0016] By adopting the above technical solution, the labyrinth seal is made of 316L stainless steel, which effectively isolates the high-temperature flue gas inside the blower housing from the floating graphite ring on the outside of the blower housing, greatly reducing the high-temperature flue gas pressure at the floating graphite ring and extending the service life of the graphite ring.

[0017] Optionally, the sealing surface between the end cover of the housing and the blower housing is filled with high-temperature corrosion resistant sealant.

[0018] By adopting the above technical solution, after the end cover of the casing and the blower casing are assembled, the high-temperature corrosion resistant sealant fills the tiny gaps at the joint surface, ensuring zero leakage at the joint surface. This effectively solves the problem of corrosion of conventional sealant by high-temperature corrosive flue gas, and meets the requirements for long-term safe and reliable operation.

[0019] Optionally, a floating end sliding bearing is provided at the end of the main shaft near the floating end support, and a fixed end sliding bearing is provided at the end of the main shaft near the fixed end support. The main shaft is rotatably connected to the overall platform through the floating end sliding bearing and the fixed end sliding bearing.

[0020] By adopting the above technical solution, the end of the spindle near the floating end support leg adopts a sliding bearing, which has good heat dissipation performance and can adapt to the spindle expansion and elongation requirements under high temperature conditions; the end of the spindle near the fixed end support leg adopts a sliding bearing, which has good heat dissipation performance and can adapt to high temperature conditions.

[0021] Optionally, the spindle peripheral wall is provided with a bushing.

[0022] By adopting the above technical solution, the bushing is made of stainless steel and assembled on the main shaft to isolate the main shaft from corrosion by high-temperature acidic flue gas. It also cooperates with the comb teeth of the labyrinth seal body to effectively isolate the high-temperature flue gas inside the blower housing and extend the service life of the graphite ring.

[0023] Optionally, the cooling fan is provided with a protective cover.

[0024] By adopting the above technical solution and setting up a protective cover, it is possible to effectively prevent external objects from rubbing against the cooling fan and causing dynamic imbalance or damage to the cooling fan, ensuring the safe and reliable operation of the high-speed rotating cooling fan, and preventing the cooling fan failure from affecting the safety of other external equipment and personnel.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By employing a floating end positioning clamping sleeve, a fixed end positioning clamping sleeve, a clamping sleeve pressure plate, and fasteners, the expansion and contraction of the blower casing due to alternating high and low temperatures can be precisely guided and controlled by the sliding of the floating end support leg in the plane and the sliding of the fixed end support leg along the centerline of the blower casing. This ensures that the expansion and contraction of the blower casing and the rotor assembly are coordinated and consistent. At the same time, it can buffer the connection pressure between the overall base and the blower casing caused by the expansion, thus making the blower safer and more stable during use. 2. The spindle and housing are sealed with carbon rings and nitrogen to ensure no leakage of toxic gases. The housing sealing surface is made of high-temperature and corrosion-resistant sealant, which solves the problem of corrosion of conventional sealants by high-temperature flue gas and meets the requirements for long-term safe and reliable operation. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the high-temperature acidic flue gas recovery and pressurization blower in the embodiments of this application.

[0027] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0028] Figure 3 yes Figure 1 A magnified view of a section at point B in the middle.

[0029] Figure 4 This is a diagram showing the blower housing support legs and guide installation in the embodiments of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Integral base; 2. Blower housing; 3. Cooling fan; 4. Protective cover; 5. Blower rotor assembly; 6. Isolation nitrogen storage chamber; 7. Floating graphite sealing ring; 8. Floating end sliding bearing; 9. Nitrogen connection pipe; 10. Ball valve; 11. Housing end cover; 12. Labyrinth seal; 13. Fixed end sliding bearing; 14. Floating end support leg; 15. Pressure sleeve plate; 16. Floating end positioning pressure sleeve; 17. Fixed end support leg; 18. Fixed end positioning pressure sleeve; 19. Expansion slide plate; 20. Expansion slide plate guide seat; 21. Position sensor; 22. High-temperature corrosion resistant sealant; 23. Shaft sleeve; 24. Main shaft; 25. Impeller; 26. Fastener; 27. Double-ended stud; 28. Locking nut. Implementation

[0031] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0032] This application discloses a high-temperature acidic flue gas recovery pressurized blower. (See also...) Figure 1 The assembly includes an integral base 1 and a blower housing 2. The blower housing 2 is installed inside the integral base 1. In this embodiment, because the high-temperature flue gas contains corrosive, toxic and other dangerous gases, the blower housing 2 is made of 316L stainless steel and adopts a multi-annealing process to solve the problem of large deformation during the manufacturing process of stainless steel housing and achieve the final required assembly accuracy.

[0033] Reference Figure 1 and Figure 2 The blower housing 2 is rotatably connected to a main shaft 24. The main shaft 24 is made of high-temperature resistant alloy steel, which helps to improve the rigidity of the main shaft 24 and ensure the safe operation of the main shaft 24. One end of the main shaft 24 is provided with a floating end sliding bearing 8, and the other end is provided with a fixed end sliding bearing 13. The main shaft 24 is rotatably connected to the overall base 1 through the floating end sliding bearing 8 and the fixed end sliding bearing 13. The use of sliding bearings provides good heat dissipation performance and adapts to the expansion and elongation requirements of the main shaft 24 under high-temperature conditions. A bushing 23 is sleeved on the periphery of the main shaft 24. The bushing 23 is made of stainless steel and is assembled on the main shaft 24 to isolate the main shaft 24 from corrosion by high-temperature acidic flue gas.

[0034] Reference Figure 1 and Figure 2 A cooling fan 3 is installed on the circumference of the main shaft 24. The cooling fan 3 is made of aluminum alloy and is installed on the main shaft 24. When the cooling fan 3 rotates at high speed, it accelerates the air flow between the blower housing 2 and the bearing seat, reducing the impact of the heat dissipation of the blower housing 2 on the bearing. A protective cover 4 is installed on the outside of the blower to prevent external objects from rubbing against it and causing the cooling fan 3 to fail in dynamic balance or be damaged. This ensures the safe and reliable operation of the high-speed rotating cooling fan 3 and prevents the failure of the cooling fan 3 from affecting the safety of other external equipment and personnel.

[0035] Reference Figure 1 An impeller 25 is installed inside the blower casing 2. The impeller 25 is made of duplex stainless steel, which improves its high temperature resistance and corrosion resistance. Special stainless steel welding process and multiple annealing process reduce the deformation of the impeller 25 and ensure that the impeller 25 can work reliably for a long time in high temperature and corrosive environment. Static and dynamic analysis is performed on the impeller 25 to calculate the expansion and deformation of the impeller 25 under alternating high temperature and normal temperature cycles, ensuring that the impeller 25 maintains a safe distance from the blower casing 2. The blower rotor assembly 5 is installed on the main shaft 24. The cooling fan 3 is driven by the blower rotor assembly 5. Finite element analysis and rotor dynamics analysis technology are used to analyze the deformation of the impeller 25 and the rigidity of the main shaft 24 to ensure that under surge conditions, the blower rotor assembly 5 can still maintain a sufficient safety distance margin between the blower rotor assembly 5 and the blower casing 2 to avoid collision and ensure the safe and stable operation of the blower.

[0036] Reference Figure 1 and Figure 2 The main shaft 24 has end caps 11 at both ends where it passes through the blower housing 2. The end caps 11 abut against the blower housing 2. The sealing surfaces of the end caps 11 and the blower housing 2 are filled with high-temperature corrosion resistant sealant 22, which effectively solves the problem of corrosion of conventional sealant by high-temperature corrosive flue gas and meets the requirements for long-term safe and reliable operation. Several floating graphite sealing rings 7 are provided at the end caps 11. The blower housing 2 expands greatly when it is working at high temperature, and the center height of the blower housing 2 changes greatly. Several sets of free-floating graphite sealing rings 7 are provided at the end caps 11. At different temperatures, the floating graphite sealing rings 7 can fit tightly with the blower rotor assembly 5 and the blower housing 2, sealing the high-temperature flue gas and the isolated nitrogen gas respectively, preventing gas leakage.

[0037] Reference Figure 1 and Figure 2 An isolation nitrogen storage chamber 6 is provided between several floating graphite sealing rings 7. The isolation nitrogen storage chamber 6 is connected to a nitrogen pipe 9. A ball valve 10 is provided on the nitrogen pipe 9. When the cooling fan 3 is running, the ball valve 10 is opened, and the nitrogen pipe 9 receives external nitrogen and delivers it to the isolation nitrogen storage chamber 6 at the end cover 11 of the casing. The nitrogen pressure value in the storage chamber is higher than the high temperature flue gas pressure value in the blower casing 2, ensuring that the flue gas does not leak out of the casing.

[0038] Reference Figure 1 and Figure 2A labyrinth seal 12 is provided at the junction of the end cover 11 of the housing and the main shaft 24 to reduce the flue gas pressure. The labyrinth seal 12 is made of 316L stainless steel and effectively isolates the high-temperature flue gas inside the blower housing 2 from the floating graphite sealing ring 7 on the outside of the blower housing 2, greatly reducing the high-temperature flue gas pressure at the floating graphite sealing ring 7. In conjunction with the bushing 23, it effectively isolates the high-temperature flue gas inside the blower housing 2 and extends the service life of the floating graphite sealing ring 7.

[0039] Reference Figure 1 and Figure 3 A floating end support leg 14 is welded to the bottom wall of the blower housing 2. The floating end support leg 14 is located on the side of the blower housing 2 near the floating end sliding bearing 8. A circular hole is opened in the floating end support leg 14, and a floating end positioning clamping sleeve 16 is installed in the circular hole. The outer edge and inner hole of the floating end positioning clamping sleeve 16 are both circular. The gap between the outer edge and the circular mounting hole of the floating end support leg 14 is uniform, and the gap in any direction of the circumference exceeds the maximum expansion of one side of the blower housing 2. A clamping sleeve pressure plate 15 and a fastener 26 are installed in the circular hole. The clamping sleeve pressure plate 15 covers the top wall of the floating end positioning clamping sleeve 16, and the installation gap between the clamping sleeve pressure plate 15 and the floating end support leg 14 is [missing information]. The fastener 26, with a diameter of 0.05-0.08mm, includes a double-ended stud 27 and a locking nut 28. The double-ended stud 27 passes through the clamping sleeve plate 15 and the floating end positioning clamping sleeve 16 in sequence and is threadedly connected to the overall base 1. The locking nut 28 is threadedly connected to the circumferential wall of the double-ended stud 27 located in the circular hole. The gap between the inner hole of the floating end positioning clamping sleeve 16 and the outer diameter of the double-ended stud 27 must be controlled within 0.1-0.15mm. The height of the floating end positioning clamping sleeve 16 is 0.05-0.08mm higher than the thickness of the bottom wall of the floating end support leg 14, to ensure that after the clamping sleeve plate 15 is installed, the floating end housing can slide freely in the circumferential direction below the clamping sleeve plate 15.

[0040] Reference Figure 1 and Figure 3The bottom wall of the blower housing 2 is also welded with a fixed end support leg 17. The fixed end support leg 17 is located on the side of the blower housing 2 near the fixed end sliding bearing 13. The fixed end support leg 17 has an oblong hole, and a fixed end positioning clamping sleeve 18 is installed in the oblong hole. The outer edge of the fixed end positioning clamping sleeve 18 is oblong, and the inner hole is circular. The outer edge mates with the oblong mounting hole of the fixed end support leg 17. The installation gap along the center line of the blower housing 2 is controlled at 0.05~0.08mm. The gaps at both ends perpendicular to the center line of the blower housing 2 exceed the maximum expansion of one side of the blower housing 2. The clamping sleeve pressure plate 15 covers the top wall of the fixed end positioning clamping sleeve 18. The installation gap between the pressure plate 15 and the fixed end support leg 17 is 0.05-0.08mm. The double-ended stud 27 passes through the pressure plate 15 and the fixed end positioning pressure sleeve 18 and is connected to the overall base 1. The locking nut 28 is threaded to the peripheral wall of the double-ended stud 27 located in the waist-shaped hole. The gap between the inner hole of the fixed end positioning pressure sleeve 18 and the outer diameter of the double-ended stud 27 must be controlled within 0.05-0.1mm to ensure that after the pressure plate 15 is installed, the fixed end support leg 17 can only slide freely below the pressure plate 15 in a direction perpendicular to the center line of the blower housing 2. The position of the fixed end support leg 17 in the direction along the center line of the blower housing 2 is restricted by the fixed end positioning pressure sleeve 18.

[0041] Reference Figure 1 and Figure 4 An expansion slide plate 19 is provided below the end cover 11 of the housing. The expansion slide plate 19 is set along the center direction of the blower housing 2. An expansion slide plate guide seat 20 is provided in the overall base 1. The expansion slide plate guide seat 20 is located below the end cover 11 of the housing. The gap between the two sides of the expansion slide plate 19 and the sides of the expansion slide plate guide seat 20 is 0.03-0.05mm. When the blower housing 2 expands, the expansion slide plate 19 will move accordingly with the blower housing 2. A position sensor 21 is provided in the expansion slide plate guide seat 20. The position sensor 21 is used to detect the expansion value of the blower housing 2 and issue an alarm when the expansion value is abnormal to avoid the blower rotor assembly 5 rubbing against the blower housing 2 and ensure safe operation.

[0042] The implementation principle of the high-temperature acidic flue gas recovery pressurization blower in this application embodiment is as follows: The blower adopts a high-efficiency pneumatic design, with good aerodynamic performance and high operating efficiency; the main shaft and the housing are sealed with carbon rings and nitrogen to ensure no leakage of toxic gases; the housing sealing surface is made of high-temperature and corrosion-resistant sealant, which solves the problem of corrosion of conventional sealants by high-temperature flue gas and meets the requirements for long-term safe and reliable operation; the blower housing is floated on the overall platform through positioning sleeves, positioning sleeve pressure plates, and expansion guide slides, realizing precise guidance and control of the expansion and contraction position of the housing under alternating high temperature and normal temperature cycles, ensuring that the expansion and contraction of the blower housing and rotor assembly are coordinated; a housing axial position monitoring sensor is provided, which automatically alarms when the data is abnormal.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-temperature acidic flue gas recovery pressurized blower, comprising an integral base (1) and a blower housing (2), wherein the blower housing (2) is installed inside the integral base (1), a main shaft (24) is rotatably connected inside the blower housing (2), and a cooling fan (3) is installed on the peripheral wall of the main shaft (24), characterized in that: The bottom wall of the blower housing (2) is provided with a floating end support leg (14) that can slide in a plane. A circular hole is opened in the floating end support leg (14), and a floating end positioning clamping sleeve (16) is provided in the circular hole. The bottom wall of the blower housing (2) is also provided with a fixed end support leg (17) that can slide along the center line of the blower housing (2). An oblong hole is opened in the fixed end support leg (17), and a fixed end positioning clamping sleeve (18) is provided in the oblong hole. A clamping sleeve pressure plate (15) and a fastener (26) are provided in both the circular hole and the oblong hole. The clamping sleeve pressure plate (15) and the fastener (26) are used to clamp the floating end support leg (14). The fastener (26) includes a double-ended stud (27) and a locking nut (28). The floating end positioning clamping sleeve (16) is circular. The clamping sleeve plate (15) covers the top wall of the floating end positioning clamping sleeve (16). The installation gap between the clamping sleeve plate (15) and the floating end support leg (14) is 0.05-0.08mm. The floating end positioning clamping sleeve (16) is 0.05-0.08mm thicker than the bottom wall of the floating end support leg (14). The double-ended stud (27) passes through the clamping sleeve plate (15) and the floating end positioning clamping sleeve (16) and is connected to the overall base (1). The locking nut (28) is threaded onto the circumferential wall of the double-ended stud (27) located in the circular hole. The locking nut (28) abuts against the clamping sleeve plate (15). The outer edge of the floating end positioning clamping sleeve (16) has a uniform gap with the inner wall of the circular hole, and the gap between the inner hole and the outer diameter of the double-ended stud (27) is 0.1-0.15mm. The fixed end positioning clamping sleeve (18) is waist-shaped, with a waist-shaped outer edge and a circular inner hole. The clamping sleeve plate (15) covers the top wall of the fixed end positioning clamping sleeve (18), and the installation gap between the clamping sleeve plate (15) and the fixed end support leg (17) is 0.05-0.08mm. The fixed end positioning clamping sleeve (18) is 0.05-0.08 mm thicker than the bottom wall of the fixed end support leg (17). The double-ended stud (27) passes through the clamping sleeve pressure plate (15) and the fixed end positioning clamping sleeve (18) and is connected to the overall base (1). The locking nut (28) is threaded to the circumferential wall of the double-ended stud (27) located in the waist-shaped hole. The locking nut (28) abuts against the clamping sleeve pressure plate (15). The installation gap between the outer edge of the fixed end positioning clamping sleeve (18) and the waist-shaped hole along the center line of the blower housing (2) is 0.05-0.08 mm. The gap between the inner hole and the outer diameter of the double-ended stud (27) is 0.05-0.08 mm.1mm; The main shaft (24) has end caps (11) at both ends passing through the blower housing (2), and the end caps (11) abut against the blower housing (2). Several floating graphite sealing rings (7) are provided at the end caps (11); An expansion slide plate (19) is provided below the end caps (11), and the expansion slide plate (19) is arranged along the center direction of the blower housing (2). An expansion slide plate guide seat (20) is provided inside the integral base (1), and the expansion slide plate guide seat (20) is located below the end caps (11). The gap between the sides of the expansion slide plate (19) and the sides of the expansion slide plate guide seat (20) is 0.03-0.05mm. A position sensor (21) is provided inside the expansion slide plate guide seat (20), and the position sensor (21) is used to detect the expansion value of the blower housing (2) so as to issue an alarm when the expansion value is abnormal.

2. The high-temperature acidic flue gas recovery and pressurization blower according to claim 1, characterized in that: An isolation nitrogen storage chamber (6) is provided between several of the floating graphite sealing rings (7), and the isolation nitrogen storage chamber (6) is connected to a nitrogen pipe (9), and a ball valve (10) is provided on the nitrogen pipe (9).

3. The high-temperature acidic flue gas recovery and pressurization blower according to claim 1, characterized in that: The end cover (11) of the housing is provided with a labyrinth seal (12) at the joint with the main shaft (24) to reduce the pressure of flue gas.

4. The high-temperature acidic flue gas recovery and pressurization blower according to claim 1, characterized in that: The sealing surface between the end cap (11) of the housing and the blower housing (2) is filled with high-temperature corrosion resistant sealant (22).

5. The high-temperature acidic flue gas recovery and pressurization blower according to claim 1, characterized in that: The main shaft (24) is provided with a floating end sliding bearing (8) at one end near the floating end support, and a fixed end sliding bearing (13) at one end near the fixed end support. The main shaft (24) is rotatably connected to the overall base (1) through the floating end sliding bearing (8) and the fixed end sliding bearing (13).

6. The high-temperature acidic flue gas recovery and pressurization blower according to claim 1, characterized in that: The main shaft (24) is provided with a bushing (23) on its peripheral wall.

7. The high-temperature acidic flue gas recovery and pressurization blower according to claim 1, characterized in that: The cooling fan (3) is provided with a protective cover (4).

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