Tail flue structure of thermal power plant boiler

Abstract

The invention relates to the technical field of boilers, and particularly discloses a thermal power plant boiler tail flue structure which comprises a flue body, mounting blocks are fixedly connected to the two sides of the inner top wall of the flue body, baffles are rotatably connected to the bottoms of the mounting blocks, and a connecting frame is fixedly connected to the surface of the flue body. The top of the surface of the connecting frame is fixedly connected with a motor box, and the inner wall of the motor box is fixedly connected with a servo motor. Through arrangement of a baffle, a connecting frame, a driving rod, a first forward and reverse rotation lead screw, first threaded lantern rings, a connecting rod, a connecting clamping block and a sliding block, during use, the first forward and reverse rotation lead screw drives the first threaded lantern rings on the two sides of the surface to move, and the first threaded lantern rings drive the connecting rod rotationally arranged at the top to move; and the top of the connecting clamping block is slidably connected to the bottom of the baffle through the sliding block, so that the baffle is rotated by a certain angle, the amount of discharged smoke is conveniently controlled by the baffle, and the effect of conveniently controlling smoke discharging is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of boilers, and in particular relates to a tail flue structure of a boiler in a thermal power plant. Background Art

[0002] Thermal power plants are important facilities for energy conversion. The design of the flue structure at the tail end of the boiler is directly related to the efficiency of smoke emission, heat recovery and utilization, as well as the overall environmental performance and operating economy. With the continuous advancement of industrial technology and increasingly stringent environmental protection requirements, the design and optimization of the flue structure at the tail end of the boiler has become a key link in the technological upgrading of thermal power plants.

[0003] However, traditional flue structures at the tail end of boilers in thermal power plants mostly adopt a simple straight-through design, in which smoke flows directly in the flue and is discharged. Although this design is simple in structure, the controllability of smoke emissions is poor, and the smoke emissions cannot be adjusted according to actual needs. As a result, when the boiler load changes, the concentration and temperature of smoke emissions are difficult to stabilize, which not only affects environmental protection indicators, but also increases the difficulty of subsequent treatment. In addition, traditional flue structures are insufficient in heat recovery and utilization. A large amount of heat energy carried by smoke during its flow is often directly discharged into the atmosphere, which not only causes energy waste, but also aggravates thermal pollution in the environment. Therefore, staff need to improve it. Summary of the invention

[0004] The object of the present invention is to provide a tail flue structure of a boiler in a thermal power plant 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:

[0006] A tail flue structure of a boiler in a thermal power plant, comprising:

[0007] Flue body;

[0008] Both sides of the inner top wall of the flue body are fixedly connected with mounting blocks, and the bottom of the mounting block is rotatably connected with a baffle;

[0009] A connecting frame is fixedly connected to the surface of the flue main body, a motor box is fixedly connected to the top of the surface of the connecting frame, a servo motor is fixedly connected to the inner wall of the motor box, a driving rod is installed at the output end of the servo motor, a first forward and reverse screw rod is fixedly connected to the front end of the driving rod, first threaded rings are threadedly connected to the two sides of the surface of the first forward and reverse screw rod, a connecting rod is rotatably connected to the top of the two first threaded rings, a connecting rod is rotatably connected to the top of the connecting rod, a sliding block is fixedly connected to the top of the connecting clamp, and the surface of the sliding block is slidably connected to the bottom of the baffle.

[0010] Preferably, the surface of the driving rod is fixedly connected to the first transmission wheel, and the surface of the first transmission wheel is inserted into the inner wall of the connecting frame, the surface of the first transmission wheel is rotatably connected to the first transmission belt, the inner wall of the first transmission belt is rotatably connected to the first driving wheel, and the surface of the first driving wheel is fixedly connected to the driving rod.

[0011] Preferably, both sides of the surface of the transmission rod are fixedly connected with a second transmission wheel, the surface of the second transmission wheel is rotatably connected with a second transmission belt, the inner wall of the second transmission belt is a second driving wheel, the back side of the second driving wheel is fixedly connected with a movable rod, the front end of the movable rod is fixedly connected with a second forward and reverse screw rod, both sides of the surface of the second forward and reverse screw rod are threadedly connected with a second threaded ring, one side of the second threaded ring is fixedly connected with a fixing rod, and one end of the fixing rod is fixedly connected with a sealing plate.

[0012] Preferably, an assembly frame is fixedly connected to the inner wall of the flue body, and the inner wall of the assembly frame is sleeved on the surfaces of the sealing plate, the fixing rod, the second threaded collar and the second forward and reverse screw rod. A filter is fixedly connected to the inner wall of the assembly frame, and the filter is arranged at the bottom of the sealing plate.

[0013] Preferably, a water inlet pipe is fixedly connected to the back of the flue body, one end of the water inlet pipe is fixedly connected to a threaded heat absorption pipe, the bottom end of the threaded heat absorption pipe is fixedly connected to a water outlet pipe, and the bottom end of the water outlet pipe is inserted through the bottom of the back of the flue body.

[0014] Preferably, a reinforcing rod is fixedly connected to the inner wall of the flue body, a heat absorbing rod is fixedly connected to the bottom end of the reinforcing rod, a plurality of heat conducting rods are fixedly connected to the surface of the heat absorbing rod, and the front end of the heat conducting rod is inserted into the inner wall of the threaded heat absorbing tube.

[0015] Preferably, a smoke inlet pipe is fixedly connected to the bottom of one side of the flue main body, a fixed bracket is fixedly connected to the bottom of the flue main body, and a conical outlet pipe is fixedly connected to the bottom of the fixed bracket.

[0016] Preferably, the bottom end of the conical outlet pipe is fixedly connected to a collecting pipe, and the surface of the collecting pipe is rotatably connected to a sealing door.

[0017] Preferably, a connection frame is fixedly connected to the bottom of the connection frame surface, and the inner wall of the connection frame is sleeved on the inner walls of the second transmission wheel, the second transmission belt, the second driving wheel and the movable rod.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) Through the arrangement of the baffle, the connecting frame, the driving rod, the first forward and reverse screw rod, the first threaded collar, the connecting rod, the connecting clamp block and the sliding block, when in use, the first forward and reverse screw rod drives the first threaded collars on both sides of the surface to move, and the first threaded collar drives the connecting rod arranged on the top to move, and the top of the connecting clamp block is slidably connected to the bottom of the baffle through the sliding block, thereby rotating the baffle to a certain angle, so that the baffle is convenient for controlling the amount of smoke discharged, thereby achieving the effect of facilitating the control of smoke discharge.

[0020] (2) Through the arrangement of a driving rod, a second forward and reverse screw rod, a second threaded collar, a fixing rod, a sealing plate, an assembly frame and a filter screen, when in use, the second forward and reverse screw rod drives the two second threaded collars on the surface to move, and a sealing plate is arranged on the surface of the second threaded collar through the fixing rod, and the sealing plate is used to control the smoke exhaust hole of the assembly frame, and a filter screen is arranged on the inner bottom wall of the assembly frame, and the filter screen is used to filter impurities in the smoke, and the smoke is controlled to be transported upward through the smoke exhaust hole, thereby controlling the amount of smoke in the baffle and the sealing plate, so that when the smoke is less, the heat in the smoke is stored in the baffle and the sealing plate for a long time, and when the smoke is more, the opening of the baffle and the sealing plate is increased, so that the amount of smoke passing through is increased, thereby achieving the effect of controlling the absorption and utilization of the heat in the smoke.

[0021] (3) Through the arrangement of the water inlet pipe, the threaded heat absorbing pipe, the water outlet pipe, the reinforcing rod, the heat absorbing rod and the heat conducting rod, when in use, cold water is poured into the interior of the threaded heat absorbing pipe to absorb the heat of the smoke, so that the heat can be easily recycled and utilized, the heat of the smoke is absorbed by the heat absorbing rod, and the heat is transferred to the interior of the threaded heat absorbing pipe through the multiple heat conducting rods on the surface of the heat absorbing rod, thereby facilitating the rapid absorption of heat and improving the heat absorption rate, thereby achieving the effect of rapidly absorbing the heat in the smoke and converting the heat energy into hot water through cold water, and improving the heat absorption efficiency and conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A perspective view of the present invention;

[0023] Figure 2 A three-dimensional diagram of the assembly frame of the present invention;

[0024] Figure 3 is a three-dimensional diagram of the baffle of the present invention;

[0025] Figure 4 A three-dimensional diagram of the threaded heat absorbing tube of the present invention;

[0026] Figure 5 A three-dimensional diagram of a heat absorbing rod of the present invention;

[0027] Figure 6 A three-dimensional diagram of the tapered outlet tube of the present invention;

[0028] In the figure: 1, flue body; 2, mounting block; 3, baffle; 4, connecting frame; 5, motor box; 6, servo motor; 7, driving rod; 8, first forward and reverse screw rod; 9, first threaded collar; 10, connecting rod; 11, connecting clamp block; 12, sliding block; 13, first transmission wheel; 14, first transmission belt; 15, first driving wheel; 16, transmission rod; 17, second transmission wheel; 18, second transmission belt; 19, second driving Wheel; 20, movable rod; 21, second forward and reverse screw rod; 22, second threaded collar; 23, fixed rod; 24, sealing plate; 25, assembly frame; 26, filter screen; 27, water inlet pipe; 28, threaded heat absorption pipe; 29, water outlet pipe; 30, reinforcement rod; 31, heat absorption rod; 32, heat conduction rod; 33, smoke inlet pipe; 34, fixed bracket; 35, tapered outlet pipe; 36, collecting pipe; 37, sealing door; 38, connection frame. DETAILED DESCRIPTION

[0029] 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.

[0030] Embodiment 1:

[0031] See also Figures 1 to 6 As shown, a tail flue structure of a boiler in a thermal power plant comprises:

[0032] Flue main body 1;

[0033] The inner top wall of the flue body 1 is fixedly connected with mounting blocks 2 on both sides, and the bottom of the mounting block 2 is rotatably connected with a baffle 3;

[0034] A connecting frame 4 is fixedly connected to the surface of the flue body 1, a motor box 5 is fixedly connected to the top of the surface of the connecting frame 4, a servo motor 6 is fixedly connected to the inner wall of the motor box 5, a driving rod 7 is installed at the output end of the servo motor 6, a first forward and reverse screw rod 8 is fixedly connected to the front end of the driving rod 7, first threaded collars 9 are threadedly connected to the two sides of the surface of the first forward and reverse screw rod 8, a connecting rod 10 is rotatably connected to the top of the two first threaded collars 9, a connecting rod 10 is rotatably connected to the top of the connecting rod 10, a connecting clamp 11 is fixedly connected to the top of the connecting clamp 11, a sliding block 12 is fixedly connected to the top of the connecting clamp 11, and the surface of the sliding block 12 is slidably connected to the bottom of the baffle 3.

[0035] When in use, baffles 3 are rotatably provided on both sides of the inner top wall of the flue main body 1 through the mounting blocks 2, and a motor box 5 is provided on the surface of the flue main body 1 through the connecting frame 4, and a servo motor 6 is provided through the motor box 5. The staff connects the servo motor 6 to the power supply, and the output end of the servo motor 6 drives the driving rod 7 to rotate, and the driving rod 7 drives the first forward and reverse screw rod 8 at the front end to rotate, and the first forward and reverse screw rod 8 drives the first threaded collar 9 on both sides of the surface to move, and the first threaded collar 9 drives the connecting rod 10 rotatably provided on the top to move, and the top of the connecting rod 10 is rotatably provided with a connecting clamp 11, and the top of the connecting clamp 11 is slidably connected to the bottom of the baffle 3 through a sliding block 12, thereby rotating the baffle 3 to a certain angle, so that the baffle 3 is convenient for controlling the amount of smoke discharged.

[0036] Embodiment 2:

[0037] See also Figures 1 to 6 As shown, the surface of the driving rod 7 is fixedly connected to the first transmission wheel 13, and the surface of the first transmission wheel 13 is inserted into the inner wall of the connecting frame 4, the surface of the first transmission wheel 13 is rotatably connected to the first transmission belt 14, the inner wall of the first transmission belt 14 is rotatably connected to the first driving wheel 15, the surface of the first driving wheel 15 is fixedly connected to the transmission rod 16, the surface of the transmission rod 16 is fixedly connected to the second transmission wheel 17 on both sides, the surface of the second transmission wheel 17 is rotatably connected to the second transmission belt 18, the inner wall of the second transmission belt 18 is a second driving wheel 19, and the back of the second driving wheel 19 is fixedly connected to the movable rod 2 0, the front end of the movable rod 20 is fixedly connected with the second forward and reverse screw rod 21, the surfaces of the second forward and reverse screw rod 21 are both threadedly connected with the second threaded collar 22, one side of the second threaded collar 22 is fixedly connected with the fixing rod 23, one end of the fixing rod 23 is fixedly connected with the sealing plate 24, the inner wall of the flue body 1 is fixedly connected with the assembly frame 25, and the inner wall of the assembly frame 25 is sleeved on the sealing plate 24, the fixing rod 23, the second threaded collar 22 and the surfaces of the second forward and reverse screw rod 21, the inner wall of the assembly frame 25 is fixedly connected with the filter screen 26, and the filter screen 26 is arranged at the bottom of the sealing plate 24.

[0038] When in use, a first transmission wheel 13 is provided on the surface of the driving rod 7, and the first transmission wheel 13 drives the first transmission belt 14 on the surface to rotate, and the first transmission belt 14 drives the first driving wheel 15 of the inner wall to rotate, and the first driving wheel 5 drives the transmission rod 16 on the surface to rotate, and the transmission rod 16 drives the two second transmission wheels 17 on the surface to rotate, and the two first transmission wheels 17 respectively drive the second transmission belts 18 to rotate, and the second transmission belts 18 drive the second driving wheel 19 connected to the inner wall to rotate, and the two second driving wheels 19 drive the movable rod 20 on the back to rotate, and the movable rod 20 drives the second forward and reverse screw rod 21 at the front end to rotate, and the second forward and reverse screw rod 21 at the front end rotates. The reversing screw 21 drives the two second threaded rings 22 on the surface to move. The surface of the second threaded ring 22 is provided with a sealing plate 24 through a fixing rod 23. The sealing plate 24 is used to control the smoke exhaust hole of the assembly frame 25, and a filter 26 is provided on the inner bottom wall of the assembly frame 25. The filter 26 is used to filter impurities in the smoke, and the smoke is controlled to be transported upward through the smoke exhaust hole, thereby controlling the amount of smoke in the baffle 3 and the sealing plate 24. When the smoke is less, the heat in the smoke is stored in the baffle 3 and the sealing plate 24 for a long time. When the smoke is more, the opening of the baffle 3 and the sealing plate 24 is increased, so that the amount of smoke passing through is increased.

[0039] Embodiment three:

[0040] See also Figures 1 to 6 As shown, a water inlet pipe 27 is fixedly connected to the back of the flue main body 1, one end of the water inlet pipe 27 is fixedly connected to a threaded heat absorbing pipe 28, the bottom end of the threaded heat absorbing pipe 28 is fixedly connected to a water outlet pipe 29, and the bottom end of the water outlet pipe 29 penetrates and is plugged into the bottom of the back of the flue main body 1, a reinforcing rod 30 is fixedly connected to the inner wall of the flue main body 1, the bottom end of the reinforcing rod 30 is fixedly connected to a heat absorbing rod 31, a plurality of heat conducting rods 32 are fixedly connected to the surface of the heat absorbing rod 31, and the front end of the heat conducting rod 32 is plugged into the inner wall of the threaded heat absorbing pipe 28 A smoke inlet pipe 33 is fixedly connected to the bottom of one side of the flue body 1, a fixed bracket 34 is fixedly connected to the bottom of the flue body 1, a conical outlet pipe 35 is fixedly connected to the bottom of the fixed bracket 34, a collecting pipe 36 is fixedly connected to the bottom end of the conical outlet pipe 35, a sealing door 37 is rotatably connected to the surface of the collecting pipe 36, a connecting frame 38 is fixedly connected to the bottom of the surface of the connecting frame 4, and the inner wall of the connecting frame 38 is sleeved on the inner wall of the second transmission wheel 17, the second transmission belt 18, the second driving wheel 19 and the movable rod 20.

[0041] When in use, a threaded heat absorbing tube 28 is arranged inside the flue main body 1, and a water inlet pipe 27 and a water outlet pipe 29 are respectively arranged at the top and the bottom of the threaded heat absorbing tube 28, thereby filling the inside of the threaded heat absorbing tube 28 with cold water to absorb the heat of the smoke, so that the heat can be easily recycled, and a reinforcement rod 30 is arranged inside the flue main body 1, and a heat absorbing rod 31 is arranged at the bottom end of the reinforcement rod 30, which absorbs the heat of the smoke through the heat absorbing rod 31, and transfers the heat to the inside of the threaded heat absorbing tube 28 through a plurality of heat conducting rods 32 on the surface of the heat absorbing rod 31, thereby facilitating rapid absorption of heat and improving the heat absorption rate, and a conical outlet pipe 35 is arranged at the bottom of the flue main body 1, and a collecting pipe 36 is arranged at the bottom end of the conical outlet pipe 35, which facilitates the collection of impurities mixed in the smoke through the collecting pipe 36, and the sealing door 37 on the surface of the collecting pipe 36 is opened, thereby quickly cleaning the impurities in the collecting pipe 36.

[0042] Embodiment 4:

[0043] See also Figures 1 to 6 As shown in the figure, in thermal power plants, the design of the boiler tail flue is crucial to the smoke emission efficiency, heat recovery and utilization, and overall operating efficiency. The traditional boiler tail flue structure may have problems such as poor smoke emission, large heat loss, and inflexible control. Therefore, the market urgently needs a new boiler tail flue structure to improve smoke emission efficiency, optimize heat recovery, and enhance control flexibility.

[0044] The core of the flue structure lies in the rotating baffles arranged on both sides of its inner top wall, which are connected to the flue body through the mounting block. When the servo motor is started, it drives the driving rod to rotate, which in turn drives the first forward and reverse screw to rotate. The first threaded collar on the first forward and reverse screw moves accordingly, and pushes the baffle to rotate through the connecting rod and the connecting clamp. This design enables the baffle to accurately control the amount of smoke emitted, thereby achieving efficient management of smoke emissions.

[0045] The flue structure synchronously introduces a combination of a second forward and reverse screw and a second threaded collar, through which the movement of the sealing plate is controlled. The sealing plate can adjust the size of the smoke exhaust hole on the assembly frame, and work together with the baffle to further fine-tune the smoke flow. At the same time, the filter screen set in the assembly frame can effectively filter impurities in the smoke and ensure the quality of the discharged smoke. This hierarchical design allows the smoke to be effectively regulated and purified during the emission process.

[0046] While improving the efficiency of smoke emission, the flue structure also focuses on the recovery and utilization of heat energy. By setting up threaded heat absorbing pipes and heat absorbing rods inside the flue, the heat in the smoke is used for heating. Cold water is poured into the threaded heat absorbing pipe, which absorbs heat and turns into hot water, which is discharged through the outlet pipe for use by other systems. The multiple heat conducting rods on the surface of the heat absorbing rod improve the heat transfer efficiency, ensuring that the heat can be fully absorbed and converted into usable heat energy. This heat recovery mechanism not only improves energy utilization efficiency, but also reduces energy consumption and emission costs.

[0047] Working principle: when in use, the staff connects the servo motor 6 to the power supply, and the output end of the servo motor 6 drives the driving rod 7 to rotate, and the driving rod 7 drives the first forward and reverse screw rod 8 at the front end to rotate, and the first forward and reverse screw rod 8 drives the first threaded collars 9 on both sides of the surface to move, and the first threaded collar 9 drives the connecting rod 10 set at the top to move, and the top of the connecting clamp 11 is slidably connected to the bottom of the baffle 3 through the sliding block 12, thereby rotating the baffle 3 to a certain angle, so that the baffle 3 is convenient for controlling the amount of smoke discharged, and the first transmission belt 14 on the surface is driven to rotate through the first transmission wheel 13, and the first transmission belt 14 drives the first driving wheel 15 of the inner wall to rotate, and the first driving wheel 5 drives the transmission rod 16 on the surface to rotate, and the transmission rod 16 drives the two second transmission wheels 17 on the surface to rotate, and the two first transmission wheels 17 respectively drive the second transmission belt 18 to rotate, and the second transmission belt 18 drives the second driving wheel 19 connected to the inner wall to rotate, and the two The second driving wheel 19 drives the movable rod 20 on the back to rotate, and the movable rod 20 drives the second forward and reverse screw rod 21 at the front end to rotate, and the second forward and reverse screw rod 21 drives the two second threaded collars 22 on the surface to move, and the surface of the second threaded collar 22 is provided with a sealing plate 24 through a fixed rod 23, and the sealing plate 24 is used to control the smoke exhaust hole of the assembly frame 25, and the filter net 26 is used to filter the impurities in the smoke, and the smoke is controlled to be transported upward through the smoke exhaust hole, and cold water is poured into the interior of the threaded heat absorption tube 28 to absorb the heat of the smoke, so that the heat can be easily recycled, and the heat of the smoke is absorbed by the heat absorption rod 31, and the heat is transmitted to the interior of the threaded heat absorption tube 28 through multiple heat conduction rods 32 on the surface of the heat absorption rod 31, thereby facilitating the rapid absorption of heat and improving the heat absorption rate, and the impurities mixed in the smoke are conveniently collected through the collecting pipe 36, and the sealing door 37 on the surface of the collecting pipe 36 is opened, thereby quickly cleaning the impurities in the collecting pipe 36.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue structure at the tail end of a boiler in a thermal power plant, characterized in that: include: Flue body (1); Both sides of the inner top wall of the flue main body (1) are fixedly connected with mounting blocks (2), and the bottom of the mounting block (2) is rotatably connected with a baffle (3); A connection frame (4) is fixedly connected to the surface of the flue body (1), a motor box (5) is fixedly connected to the top of the surface of the connection frame (4), a servo motor (6) is fixedly connected to the inner wall of the motor box (5), a driving rod (7) is installed at the output end of the servo motor (6), a first forward and reverse screw rod (8) is fixedly connected to the front end of the driving rod (7), first threaded collars (9) are threadedly connected to the two sides of the surface of the first forward and reverse screw rod (8), the tops of the two first threaded collars (9) are rotatably connected to a connecting rod (10), the top of the connecting rod (10) is rotatably connected to a connecting clamp (11), the top of the connecting clamp (11) is fixedly connected to a sliding block (12), and the surface of the sliding block (12) is slidably connected to the bottom of the baffle (3).

2. A tail flue structure of a boiler in a thermal power plant according to claim 1, characterized in that: The surface of the driving rod (7) is fixedly connected to a first transmission wheel (13), and the surface of the first transmission wheel (13) is inserted into the inner wall of the connecting frame (4); the surface of the first transmission wheel (13) is rotatably connected to a first transmission belt (14); the inner wall of the first transmission belt (14) is rotatably connected to a first driving wheel (15); and the surface of the first driving wheel (15) is fixedly connected to a transmission rod (16).

3. A tail flue structure of a boiler in a thermal power plant according to claim 2, characterized in that: The transmission rod (16) is fixedly connected to a second transmission wheel (17) on both sides of its surface; the second transmission wheel (17) is rotatably connected to a second transmission belt (18); the inner wall of the second transmission belt (18) is a second driving wheel (19); the back side of the second driving wheel (19) is fixedly connected to a movable rod (20); the front end of the movable rod (20) is fixedly connected to a second forward and reverse screw rod (21); the second forward and reverse screw rod (21) is threadedly connected to a second threaded collar (22) on both sides of its surface; one side of the second threaded collar (22) is fixedly connected to a fixed rod (23); one end of the fixed rod (23) is fixedly connected to a sealing plate (24).

4. The tail flue structure of a boiler in a thermal power plant according to claim 1, characterized in that: The inner wall of the flue body (1) is fixedly connected to an assembly frame (25), and the inner wall of the assembly frame (25) is sleeved on the surfaces of the sealing plate (24), the fixing rod (23), the second threaded collar (22) and the second forward and reverse screw rod (21); the inner wall of the assembly frame (25) is fixedly connected to a filter screen (26), and the filter screen (26) is arranged at the bottom of the sealing plate (24).

5. The tail flue structure of a boiler in a thermal power plant according to claim 1, characterized in that: The back of the flue main body (1) is fixedly connected to a water inlet pipe (27), one end of the water inlet pipe (27) is fixedly connected to a threaded heat absorption pipe (28), the bottom end of the threaded heat absorption pipe (28) is fixedly connected to a water outlet pipe (29), and the bottom end of the water outlet pipe (29) is inserted through the bottom of the back of the flue main body (1).

6. The tail flue structure of a boiler in a thermal power plant according to claim 1, characterized in that: The inner wall of the flue body (1) is fixedly connected to a reinforcing rod (30), the bottom end of the reinforcing rod (30) is fixedly connected to a heat absorbing rod (31), the surface of the heat absorbing rod (31) is fixedly connected to a plurality of heat conducting rods (32), and the front end of the heat conducting rod (32) is inserted into the inner wall of the threaded heat absorbing tube (28).

7. The tail flue structure of a boiler in a thermal power plant according to claim 1, characterized in that: A smoke inlet pipe (33) is fixedly connected to the bottom of one side of the flue main body (1), a fixed bracket (34) is fixedly connected to the bottom of the flue main body (1), and a conical outlet pipe (35) is fixedly connected to the bottom of the fixed bracket (34).

8. The tail flue structure of a boiler in a thermal power plant according to claim 7, characterized in that: The bottom end of the conical outlet pipe (35) is fixedly connected to a collecting pipe (36), and the surface of the collecting pipe (36) is rotatably connected to a sealing door (37).

9. The tail flue structure of a boiler in a thermal power plant according to claim 1, characterized in that: A connection frame (38) is fixedly connected to the bottom of the surface of the connection frame (4), and the inner wall of the connection frame (38) is sleeved on the inner walls of the second transmission wheel (17), the second transmission belt (18), the second driving wheel (19) and the movable rod (20).

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