Gas turbine exhaust system capable of being preheated and exhaust method thereof

Abstract

The invention relates to the technical field of exhaust, in particular to a gas turbine exhaust system capable of being preheated and an exhaust method of the gas turbine exhaust system. The two sets of deflection plates are rotationally mounted in the purification box, and the two sets of deflection plates are arranged in parallel; the driving assembly is arranged on the purification box and connected with the deflection plate, and the driving assembly can drive the deflection plate to swing back and forth in the purification box; the stirring assembly is arranged in the purification box and connected with the driving assembly, and the stirring assembly can stir the absorption liquid in the purification box; the rotating rod is rotationally installed in the heating box, the interior of the rotating rod is of a hollow structure, and the rotating rod is connected with an air inlet pipe penetrating through the heating box through a rotating connecting assembly; the guide plates are circumferentially arranged on the rotating rod at equal intervals, and dispersion holes are formed in the circumferential surface of the rotating rod and located between the two guide plates; and the heating plate group is mounted in the heating box and is coaxial with the rotating rod, so that the temperature during waste gas treatment is increased.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust gas, in particular to a preheatable gas turbine exhaust system and an exhaust gas method thereof. Background Art

[0002] As an important industrial equipment, the exhaust gas emission of gas turbines has always attracted much attention. Reducing the emission of harmful substances generated during the operation of gas turbines can reduce the pollution to the atmosphere, water and soil.

[0003] In the treatment of exhaust gas emitted by gas turbines, most of the time, the treatment is carried out by absorption through treatment liquid. However, in the actual emission of exhaust gas, the temperature of the exhaust gas will drop in the treatment pipeline. At this time, there is condensation of water vapor in the exhaust gas, resulting in residual wastewater mixed with harmful substances in the treatment pipeline. The harmful substances in this part of wastewater cannot be absorbed by the treatment liquid, and there is a risk of polluting the environment when discharged. Summary of the invention

[0004] The object of the present invention is to provide a preheatable gas turbine exhaust system and an exhaust method thereof to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A preheatable gas turbine exhaust system comprising: Connected purification box and heating box; Deflection plates are provided in two groups and are rotatably installed in the purification box, and the two groups of deflection plates are arranged in parallel; A driving assembly, disposed on the purification box and connected to the deflection plate, the driving assembly being capable of driving the deflection plate to swing back and forth in the purification box; A stirring assembly, disposed in the purification box and connected to the driving assembly, the stirring assembly being capable of stirring the absorption liquid placed in the purification box; A rotating rod is rotatably mounted in the heating box, the interior of the rotating rod is a hollow structure, and the rotating rod is connected to an air inlet pipe that passes through the heating box through a rotating connection assembly; Guide plates are arranged on the rotating rod at equal intervals on the circumference, and scattered holes are arranged on the circumferential surface of the rotating rod between the two guide plates; A heating plate group is installed in the heating box and is coaxial with the rotating rod.

[0006] As a further solution of the present invention: the deflection plate comprises a deflection sleeve rotatably mounted in the purification box, the interior of the deflection sleeve is a hollow structure, and a telescopic plate is slidably mounted in the deflection sleeve, and a pulley is rotatably mounted on one end of the telescopic plate away from the deflection sleeve; The deflection plate also includes a transverse member arranged on the inner wall of the purification box. The transverse member is provided with a slide groove along its length direction, and the pulley can roll in the slide groove.

[0007] As a further solution of the present invention: a connecting rod is connected to the rotating shaft of the two groups of deflection sleeves, and a follower is connected to one end of the connecting rod away from the deflection sleeve; The driving assembly includes a No. 1 motor installed on the purification box, the output shaft of the No. 1 motor is connected to a turntable installed on the purification box for rotation via a No. 1 belt, an engaging wheel is rotatably installed at an eccentric position of the turntable, and the engaging wheel can roll in an engaging groove formed on the follower.

[0008] As a further solution of the present invention: the stirring assembly comprises a rotating shaft rotatably mounted in the purification box and located on the upper part of the horizontal member, a plurality of annular grooves are equidistantly arranged on the rotating shaft, a collar is slidably sleeved in the annular groove, and an inclined plate is connected to the collar; The stirring assembly also includes a locking structure arranged on the annular groove and the collar.

[0009] As a further solution of the present invention: the locking structure comprises a locking groove arranged on the top of the annular groove and a locking block arranged on the collar and adapted to the locking groove; The locking structure also includes a No. 1 floating ball arranged at an end of the inclined plate away from the collar.

[0010] As a further solution of the present invention: a liquid inlet pipe is also installed on the side of the purification box, a blocking plate is slidably installed in the liquid inlet pipe, and a through hole is provided on the blocking plate, which overlaps with the liquid inlet pipe and enables the liquid inlet pipe to be conductive; A second floating ball is also arranged at the bottom of the blocking plate.

[0011] As a further solution of the present invention: a No. 2 motor is installed on the heating box, and the output shaft of the No. 2 motor is coaxially connected to the rotating rod; The rotary connection assembly includes a plurality of connection holes arranged on the rotary rod and a connection seat communicated with the air intake pipe and sealingly and slidably connected to the rotary rod. The gas entering the air intake pipe can enter the rotary rod through the connection seat and the connection holes.

[0012] As a further solution of the present invention: the heating plate group includes a heating plate No. 1 and a heating plate No. 2 coaxially arranged in the heating box, the length of the heating plate No. 2 is smaller than the length of the heating plate No. 1, and a plurality of holes are arranged on the circumferential outer walls of the heating plate No. 1 and the heating plate No. 2.

[0013] An exhaust method for a preheatable gas turbine exhaust system as described above comprises the following steps: Step 1: The waste gas to be treated enters the rotating rod through the air inlet pipe and the rotating connection assembly. The rotation of the rotating rod and the air pressure can make the waste gas escape from the dispersion holes and contact the heating plate group to be heated; Step 2: The heated waste enters the purification box and evenly enters the treatment liquid under the guidance of the deflection plate; Step 3: The stirring component rotates to drive the treatment liquid to rotate, so that the exhaust gas can follow the treatment liquid to make a spiral motion to purify the exhaust gas; Step 4: The treated waste gas is discharged.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By setting the deflection plate and the driving assembly, when the waste gas enters the purification box, the waste gas can be guided under the action of the deflection sleeve and the telescopic plate, so that the waste gas entering the purification box can follow the movement of the telescopic plate, thereby evenly moving from bottom to top in the purification box and contacting with the treatment liquid, and the waste gas is treated with the treatment liquid to ensure the uniformity of the treatment liquid and avoid saturation of the evolution liquid in a certain area of ​​the purification box; By setting the stirring assembly, the treatment liquid can generate downward pressure under the action of the inclined plate, that is, it has the effect of pressurizing the treatment liquid, improving the treatment effect of the treatment liquid, and at the same time, the treatment liquid will also act on the inclined plate in the reverse direction, so that the collar can fit more precisely with the upper surface of the annular groove, and the degree of engagement between the locking block and the locking groove is greater; By setting up the rotating rod, guide plate and heating plate group, the exhaust gas can make a spiral motion when entering the heating box, which increases the residence time of the exhaust gas in the heating box and improves the heating effect. When the exhaust gas enters the air guide duct, it needs to pass through the hole three times, which can achieve multiple heating of the exhaust gas, further improving the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of an embodiment of a preheatable gas turbine exhaust system.

[0016] Figure 2 The figure is a schematic diagram of the internal structure of a purification box in one embodiment of a preheatable gas turbine exhaust system.

[0017] Figure 3 for Figure 2 A magnified view of the structure at center.

[0018] Figure 4 A schematic diagram of the structure of a deflection plate and a drive assembly in an embodiment of a preheatable gas turbine exhaust system.

[0019] Figure 5 A schematic diagram of the structure of a deflection plate and a drive assembly in an embodiment of a preheatable gas turbine exhaust system.

[0020] Figure 6 for Figure 5 A magnified view of the structure at point B.

[0021] Figure 7 An exploded view of the structure of an agitation assembly in one embodiment of a preheatable gas turbine exhaust system.

[0022] Figure 8 A schematic diagram of the internal structure of a heating box in an embodiment of a preheatable gas turbine exhaust system.

[0023] Fig. 9 An exploded view of the structure of a rotary connection assembly in one embodiment of a preheatable gas turbine exhaust system.

[0024] In the figure: 1, purification box; 2, No. 1 motor; 3, No. 1 belt; 4, turntable; 5, interlocking wheel; 6, follower; 601, interlocking groove; 7, connecting rod; 8, deflection sleeve; 9, telescopic plate; 10, pulley; 11, horizontal member; 1101, slideway; 12, No. 2 belt; 13, bevel gear set; 14, No. 3 belt; 15, rotating shaft; 1501, annular groove; 1502, locking groove; 16. Ring; 1601. Locking block; 17. No. 1 float; 18. Inclined plate; 19. Liquid inlet pipe; 20. Sealing plate; 2001. Through hole; 21. No. 2 float; 22. Heating box; 23. Inlet pipe; 24. Connecting seat; 25. Rotating rod; 2501. Connecting hole; 2502. Dispersion hole; 26. Guide plate; 27. No. 1 heating plate; 28. No. 2 heating plate; 29. ​​No. 2 motor. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0027] See also Figure 1 to Figure 9 In an embodiment of the present invention, a preheatable gas turbine exhaust system includes: a connected purification box 1 and a heating box 22, a deflection plate, a drive assembly, an agitation assembly, a rotating rod 25, a guide plate 26 and a heating plate group.

[0028] The purification box 1 is connected to the heating box 22 via an air duct, and an exhaust valve is provided at the connection between the air duct and the purification box 1; The deflection plate is provided with two groups and is rotatably installed in the purification box 1. The two groups of deflection plates are arranged in parallel. The deflection plate comprises a deflection sleeve 8 rotatably installed in the purification box 1. The interior of the deflection sleeve 8 is a hollow structure, and a telescopic plate 9 is slidably installed in the deflection sleeve 8. The end of the telescopic plate 9 away from the deflection sleeve 8 is rotatably installed with a pulley 10; The deflection plate also includes a transverse member 11 disposed on the inner wall of the purification box 1, and the transverse member 11 is provided with a slide groove 1101 along its length direction, and the pulley 10 can roll in the slide groove 1101; The driving assembly is arranged on the purification box 1 and connected to the deflection plate, and the driving assembly can drive the deflection plate to swing back and forth in the purification box 1; A connecting rod 7 is connected to the rotating shaft of the two groups of deflection sleeves 8, and a follower 6 is connected to one end of the connecting rod 7 away from the deflection sleeve 8; The driving assembly includes a No. 1 motor 2 installed on the purification box 1, and the output shaft of the No. 1 motor 2 is connected to a turntable 4 rotatably installed on the purification box 1 through a No. 1 belt 3. An engaging wheel 5 is rotatably installed at an eccentric position of the turntable 4, and the engaging wheel 5 can roll in an engaging groove 601 formed on the follower 6.

[0029] When in use, the heated exhaust gas enters the purification box 1 through the exhaust valve. At this time, the No. 1 motor 2 is controlled to work. When the output shaft of the No. 1 motor 2 rotates, it drives the turntable 4 connected thereto to rotate, and makes the engaging wheel 5 do circular motion. Since the engaging wheel 5 cooperates with the engaging groove 601, the follower 6 can reciprocate when the engaging wheel 5 makes a circular motion, and the two sets of deflection sleeves 8 are connected to the follower 6 through two connecting rods 7, thereby forming a parallelogram structure, so that when the follower 6 reciprocates, its lower end can be in a horizontal state, and when the follower 6 reciprocates, it can drive the two connecting rods 7 to swing, thereby driving the two deflection sleeves 8 to swing. At this time, the telescopic plate 9 can swing with the deflection sleeve 8, and with the cooperation of the slide groove 1101 and the pulley 10, the height of the end is kept constant, and the exhaust gas entering the purification box 1 is guided, so that the exhaust gas can move evenly from bottom to top in the purification box 1, and contact with the treatment liquid, and the exhaust gas is treated by the treatment liquid.

[0030] Through the above arrangement, when the exhaust gas enters the purification box 1, the exhaust gas can be guided under the action of the deflection sleeve 8 and the telescopic plate 9, so that the exhaust gas entering the purification box 1 can follow the movement of the telescopic plate 9, thereby moving evenly from bottom to top in the purification box 1 and contacting with the treatment liquid. The exhaust gas is treated with the treatment liquid to ensure the uniformity of the treatment liquid and avoid saturation of the evolution liquid in a certain area of ​​the purification box 1.

[0031] See also Figure 2~Figure 3 , Figure 7 The stirring assembly is arranged in the purification box 1 and connected to the driving assembly. The stirring assembly can stir the absorption liquid placed in the purification box 1. The stirring assembly includes a rotating shaft 15 rotatably installed in the purification box 1 and located on the upper part of the horizontal member 11. A plurality of annular grooves 1501 are equidistantly arranged on the rotating shaft 15. A ring 16 is slidably sleeved in the annular groove 1501. An inclined plate 18 is connected to the ring 16. A bevel gear set 13 is arranged on the purification box 1. The bevel gear set 13 is connected to the rotating shaft 15 through a No. 3 belt 14 and is connected to the rotating shaft of the turntable 4 through a No. 2 belt 12.

[0032] The stirring assembly further includes a locking structure provided on the annular groove 1501 and the collar 16, wherein the locking structure includes a locking groove 1502 provided on the top of the annular groove 1501 and a locking block 1601 provided on the collar 16 and adapted to the locking groove 1502; The locking structure further includes a No. 1 floating ball 17 disposed at one end of the inclined plate 18 away from the collar 16; Furthermore, a liquid inlet pipe 19 is installed on the side of the purification box 1, and a sealing plate 20 is slidably installed in the liquid inlet pipe 19. The sealing plate 20 is provided with a through hole 2001 that overlaps with the liquid inlet pipe 19 and enables the liquid inlet pipe 19 to be conductive. A second float 21 is also provided at the bottom of the sealing plate 20.

[0033] When the turntable 4 rotates, the rotating shaft of the turntable 4 will drive the rotating shaft 15 to rotate through the No. 2 belt 12, the bevel gear set 13 and the No. 3 belt 14. At this time, since the purification box 1 is filled with treatment liquid, the No. 1 float 17 can drive the ring 16 to move upward under the action of gravity, so that the locking block 1601 can be engaged with the locking groove 1502, so that when the rotating shaft 15 rotates, it can drive the ring 16 to rotate, and when the ring 16 rotates, it can drive the inclined plate 18 to do circular motion. At this time, the inclined plate 18 can act on the treatment liquid and generate downward pressure on the treatment liquid, that is, it has the effect of pressurizing the treatment liquid, thereby improving the treatment effect of the treatment liquid. At the same time, the treatment liquid will also act in the opposite direction on the inclined plate 18, so that the ring 16 can fit more precisely with the upper surface of the annular groove 1501, so that the locking block 1601 and the locking groove 1502 are more engaged.

[0034] Furthermore, as the reaction proceeds, the amount of treated liquid in the purification box 1 will decrease, and the No. 2 float 21 will also decrease, causing the sealing plate 20 to move downward until the through hole 2001 coincides with the liquid inlet pipe 19. At this time, the liquid inlet pipe 19 is connected, allowing the external treated liquid to enter the purification box 1 to replenish the treated liquid.

[0035] Furthermore, when the level of the treated liquid drops to a certain level and there is no treatment liquid to be replenished, the float 17 will drive the collar 16 to move downward. At this time, the locking groove 1502 is separated from the locking block 1601, and the collar 16 and the rotating shaft 15 are allowed to rotate freely. At this time, the load of the motor 2 can be reduced, and as the liquid level drops, when the load of the motor 2 is less than the predetermined value, the device will alarm.

[0036] Through the above-mentioned arrangement, the treatment liquid can generate downward pressure under the action of the inclined plate 18, that is, it has the effect of pressurizing the treatment liquid, thereby improving the treatment effect of the treatment liquid. At the same time, the treatment liquid will also act in the opposite direction on the inclined plate 18, so that the ring 16 can fit more precisely with the upper surface of the annular groove 1501, and the locking block 1601 and the locking groove 1502 can be more closely fitted.

[0037] See also Figure 1 , Figure 8~Figure 9The rotating rod 25 is rotatably mounted in the heating box 22 and connected to the output shaft of the second motor 29 disposed on the heating box 22. The interior of the rotating rod 25 is a hollow structure, and the rotating rod 25 is connected to the air inlet pipe 23 that passes through the heating box 22 through a rotating connection assembly; The rotary connection assembly includes a plurality of connection holes 2501 provided on the rotary rod 25 and a connection seat 24 which is in communication with the air inlet pipe 23 and is sealed and slidably connected to the rotary rod 25. The gas entering the air inlet pipe 23 can enter the rotary rod 25 through the connection seat 24 and the connection holes 2501. The guide plates 26 are equidistantly arranged on the rotating rod 25, and scattered holes 2502 are arranged on the circumferential surface of the rotating rod 25 between two guide plates 26; The heating plate group is installed in the heating box 22 and is coaxial with the rotating rod 25. The heating plate group includes a No. 1 heating plate 27 and a No. 2 heating plate 28 coaxially arranged in the heating box 22. The length of the No. 2 heating plate 28 is smaller than the length of the No. 1 heating plate 27, and a plurality of holes are arranged on the circumferential outer walls of the No. 1 heating plate 27 and the No. 2 heating plate 28.

[0038] When the exhaust gas enters the heating box 22, it will enter the connecting seat 24 through the air inlet pipe 23, and then enter the interior of the rotating rod 25 through the connecting hole 2501. At this time, the exhaust gas can enter the heating box 22 through the dispersion hole 2502. At the same time, the No. 2 motor 29 can drive the rotating rod 25 to rotate and drive the guide plate 26 to rotate, thereby driving the exhaust gas to rotate in the heating box 22. During this process, the exhaust gas can make a spiral motion in the heating box 22, which increases the time the exhaust gas is heated.

[0039] It should be noted that when the exhaust gas enters the heating box 22, the exhaust gas will enter the cavity formed between the No. 1 heating plate 27 and the inner wall of the heating box 22 through the holes on the No. 1 heating plate 27, and when the exhaust gas enters the air duct, the exhaust gas will pass through the cavity through the holes on the No. 1 heating plate 27 and the No. 2 heating plate 28, thereby achieving multiple heating of the exhaust gas and improving the heating effect.

[0040] Through the above-mentioned arrangement, when the exhaust gas enters the heating box 22, it can make a spiral motion, thereby increasing the residence time of the exhaust gas in the heating box 22 and improving the heating effect. When the exhaust gas enters the air duct, it needs to pass through the hole three times, which can achieve multiple heating of the exhaust gas and further improve the heating effect.

[0041] As an embodiment of the present invention, an exhaust method of a preheatable gas turbine exhaust system as described above is also proposed, comprising the following steps: Step 1: The waste gas to be treated enters the rotating rod 25 through the air inlet pipe 23 and the rotating connection assembly. The rotation of the rotating rod 25 and the air pressure can make the waste gas escape from the dispersion hole 2502 and contact the heating plate group to be heated; Step 2: The heated waste enters the purification box 1 and evenly enters the treatment liquid under the guidance of the deflection plate; Step 3: The stirring component rotates to drive the treatment liquid to rotate, so that the exhaust gas can follow the treatment liquid to make a spiral motion to purify the exhaust gas; Step 4: The treated waste gas is discharged.

[0042] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A preheatable gas turbine exhaust system, characterized in that: include: A purification box (1) and a heating box (22) connected to each other; Deflection plates are provided in two groups and are rotatably mounted in the purification box (1), and the two groups of deflection plates are arranged in parallel; a drive assembly, arranged on the purification box (1) and connected to the deflection plate, the drive assembly being capable of driving the deflection plate to swing back and forth in the purification box (1); a stirring assembly, arranged in the purification box (1) and connected to the driving assembly, the stirring assembly being capable of stirring the absorption liquid placed in the purification box (1); A rotating rod (25) is rotatably mounted in the heating box (22); the interior of the rotating rod (25) is a hollow structure, and the rotating rod (25) is connected to an air inlet pipe (23) that passes through the heating box (22) via a rotating connection assembly; Guide plates (26) are arranged on the rotating rod (25) at equal intervals in a circumference, and dispersion holes (2502) are arranged on the circumferential surface of the rotating rod (25) between two guide plates (26); A heating plate group is installed in the heating box (22) and is coaxial with the rotating rod (25).

2. A preheatable gas turbine exhaust system according to claim 1, characterized in that: The deflection plate comprises a deflection sleeve (8) rotatably mounted in the purification box (1); the interior of the deflection sleeve (8) is a hollow structure, and a telescopic plate (9) is slidably mounted in the deflection sleeve (8); a pulley (10) is rotatably mounted on one end of the telescopic plate (9) away from the deflection sleeve (8); The deflection plate also includes a transverse member (11) arranged on the inner wall of the purification box (1), and the transverse member (11) is provided with a slide groove (1101) along its length direction, and the pulley (10) can roll in the slide groove (1101).

3. A preheatable gas turbine exhaust system according to claim 2, characterized in that: A connecting rod (7) is connected to the rotating shafts of the two groups of deflection sleeves (8), and a follower (6) is connected to one end of the connecting rod (7) away from the deflection sleeves (8); The driving assembly comprises a No. 1 motor (2) mounted on the purification box (1); the output shaft of the No. 1 motor (2) is connected to a turntable (4) rotatably mounted on the purification box (1) via a No. 1 belt (3); an engaging wheel (5) is rotatably mounted at an eccentric position of the turntable (4); the engaging wheel (5) is capable of rolling in an engaging groove (601) formed on the follower (6).

4. A preheatable gas turbine exhaust system according to claim 3, characterized in that: The stirring assembly comprises a rotating shaft (15) rotatably mounted in the purification box (1) and located on the upper part of the transverse member (11); a plurality of annular grooves (1501) are equidistantly arranged on the rotating shaft (15); a sleeve (16) is slidably sleeved in the annular groove (1501); and an inclined plate (18) is connected to the sleeve (16); The stirring assembly further comprises a locking structure arranged on the annular groove (1501) and the collar (16).

5. A preheatable gas turbine exhaust system according to claim 4, characterized in that: The locking structure comprises a locking groove (1502) arranged on the top of the annular groove (1501) and a locking block (1601) arranged on the collar (16) and adapted to the locking groove (1502); The locking structure further comprises a No. 1 floating ball (17) arranged at an end of the inclined plate (18) away from the collar (16).

6. A preheatable gas turbine exhaust system according to claim 1, characterized in that: A liquid inlet pipe (19) is also installed on the side of the purification box (1), a sealing plate (20) is slidably installed in the liquid inlet pipe (19), and a through hole (2001) is provided on the sealing plate (20) which overlaps with the liquid inlet pipe (19) and enables the liquid inlet pipe (19) to be conductive; A second floating ball (21) is also provided at the bottom of the blocking plate (20).

7. A preheatable gas turbine exhaust system according to claim 1, characterized in that: A second motor (29) is mounted on the heating box (22), and an output shaft of the second motor (29) is coaxially connected to the rotating rod (25); The rotary connection assembly comprises a plurality of connection holes (2501) arranged on the rotary rod (25) and a connection seat (24) which is in communication with the air inlet pipe (23) and is sealingly and slidably connected to the rotary rod (25); gas entering the air inlet pipe (23) can enter the rotary rod (25) through the connection seat (24) and the connection holes (2501).

8. A preheatable gas turbine exhaust system according to claim 1, characterized in that: The heating plate group comprises a first heating plate (27) and a second heating plate (28) coaxially arranged in the heating box (22); the length of the second heating plate (28) is shorter than the length of the first heating plate (27); and a plurality of holes are arranged on the circumferential outer walls of the first heating plate (27) and the second heating plate (28).

9. An exhaust method for a preheatable gas turbine exhaust system according to claim 1, characterized in that: The following steps are involved: Step 1: the waste gas to be treated enters the rotating rod (25) through the air inlet pipe (23) and the rotating connection assembly. The rotation of the rotating rod (25) and the air pressure can cause the waste gas to escape from the dispersion holes (2502) and contact the heating plate group to be heated; Step 2: The heated waste enters the purification box (1) and, under the guidance of the deflection plate, evenly enters the treatment liquid; Step 3: The stirring component rotates to drive the treatment liquid to rotate, so that the exhaust gas can follow the treatment liquid to make a spiral motion to purify the exhaust gas; Step 4: The treated waste gas is discharged.

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