Heat pipe type steam generator based on boiler exhaust smoke waste heat utilization

Abstract

The invention discloses a heat pipe type steam generator based on boiler exhaust smoke waste heat utilization, and relates to the field of steam generators, the heat pipe type steam generator specifically comprises a steam generator shell, a heating furnace is arranged in the steam generator shell, a front heat exchange smoke pipe is arranged on one side of the heating furnace, and rear heat exchange smoke pipes are arranged on the two sides of the front heat exchange smoke pipe; a smoke outlet is formed in the top of the steam generator shell, and a residual smoke pushing mechanism and an intermittent smoke discharging mechanism are arranged on one side of the rear heat exchange smoke pipe. The multiple heat conduction bins are arranged in the area located at the tail end of the heat exchange smoke pipe, hot smoke is fed into the heat conduction bins through the push plate moving in a reciprocating mode, the heat conduction bins conduct heat into water again, the heat utilization effect of the hot smoke is improved, meanwhile, the cover ring and the pressing plate are arranged at the smoke exchange position, and the heat exchange efficiency is improved. Hot flue gas is directly extruded and fed into the heat exchange flue gas pipe through reciprocating motion, the residence time of the high-temperature flue gas is shortened, and heat waste of the high-temperature flue gas is avoided.

Description

Technical Field

[0001] This invention relates to the field of steam generators, and more specifically, to heat pipe steam generators based on the utilization of waste heat from boiler flue gas. Background Technology

[0002] A steam generator is a mechanical device that uses the thermal energy of fuel or other energy sources to heat water into steam. It is widely used in various occasions. A steam boiler is sometimes called a steam generator and is an important component of a steam power unit. Industrial boilers are essential equipment in various industrial enterprises to provide the steam required for production and heating. There are a large number of industrial boilers, which consume a lot of fuel. Waste heat boilers that use high-temperature waste gas from the production process as a heat source play an important role in energy conservation.

[0003] For example, utility model patent CN201507907U discloses a heat pipe type waste heat steam and hot water generator, which recovers and utilizes waste heat in the exhaust pipe of industrial boiler. The high-temperature exhaust gas heats the lower end of the heat pipe through the flue gas heat exchange box. Once activated, the heat pipe automatically conducts heat to the upper end, thereby heating and vaporizing the water in the steam generator to produce hot water and steam for industrial and domestic use.

[0004] However, the aforementioned patent documents only have the function of heating water through the temperature of the heat exchange flue. In actual use, after the heat exchange flue heats the water, the hot flue gas discharged from the tail end still has a temperature that is not utilized, which results in heat waste. At the same time, it is necessary to cool it down before it can be discharged, and it is impossible to fully utilize the heat of the high-temperature hot flue gas.

[0005] Meanwhile, when high-temperature hot gas is recycled, there is a lack of auxiliary delivery effect. That is, when part of the hot flue gas remains at the flue gas exchange position, there is a lack of function to actively send the hot flue gas into the heat exchange tube, which further causes some high-temperature flue gas to waste heat. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a heat pipe steam generator based on the utilization of waste heat from boiler flue gas, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a heat pipe steam generator based on the utilization of waste heat from boiler flue gas, comprising a steam generator shell, a heating furnace disposed inside the steam generator shell, a front heat exchange flue pipe disposed on one side of the heating furnace, rear heat exchange flue pipes disposed on both sides of the front heat exchange flue pipe, and a flue gas outlet disposed on the top of the steam generator shell;

[0008] A residual smoke pushing mechanism and an intermittent smoke exhaust mechanism are provided on one side of the post heat exchange flue. The residual smoke pushing mechanism includes a motor fixedly installed at the bottom of the steam generator housing. A rotating rod is provided on the top of the motor. The rotating rod is rotatably installed on the inner wall of the steam generator housing.

[0009] A turntable is fixedly installed on the top of the rotating rod. The turntable is set in a horizontal position. A push rod is fixedly installed at the eccentric part of the top of the turntable. The outer wall of the push rod is provided with a plate, which is set in a horizontal position.

[0010] In a preferred embodiment, a plurality of push rods are fixedly installed on the outer wall of the plate, and a partition is slidably installed on one side of the plurality of push rods. The partition is fixedly installed on the inner wall of the steam generator shell, and two guide plates are fixedly installed on one side of the partition. The two guide plates are arranged in an inclined state and are arranged corresponding to the rear heat exchange flue.

[0011] In a preferred embodiment, a heat-conducting chamber is provided on one side of the plurality of push rods, the plurality of heat-conducting chambers are fixedly installed on the inner wall of the steam generator shell, the plurality of heat-conducting chambers are arranged vertically, the plurality of heat-conducting chambers are arranged parallel to each other, and an expansion plate is fixedly installed on the outer wall of the plurality of heat-conducting chambers.

[0012] In a preferred embodiment, the inner walls of the plurality of heat-conducting chambers are provided with push plates, the push plates are fixedly installed on the outer walls of the push rods, the push plates are arranged in a vertical state, the outer walls of the push plates are fixedly installed with rubber pads, the outer walls of the rubber pads are in contact with the inner walls of the heat-conducting chambers, the inner walls of the push plates are provided with ventilation grooves, and a sealing plate is provided on one side of the ventilation grooves, the sealing plate being rotatably installed on the outer walls of the push plates.

[0013] In a preferred embodiment, the intermittent smoke exhaust mechanism includes a partition plate fixedly installed on the inner wall of the bottom of the heat conduction chamber. The length of the partition plate is less than the length of the inner wall of the heat conduction chamber. Multiple railings are fixedly installed on the inner wall of the heat conduction chamber. The multiple railings are arranged in an alternating manner, and the multiple railings and the partition plate are arranged corresponding to each other.

[0014] In a preferred embodiment, the bottom of the heat-conducting chamber is connected to a gas guide pipe, and a cover plate is provided on one side of the gas guide pipe. The cover plate is rotatably installed on the inner wall of the steam generator housing, and a limit spring is fixedly installed on the outer wall of the cover plate. The limit spring is fixedly installed on the inner wall of the steam generator housing.

[0015] In a preferred embodiment, a push mechanism is provided on one side of the front heat exchange flue. The push mechanism includes a double pulley fixedly installed on the outer wall of the rotating rod. Two synchronous belts are rotatably installed on the outer wall of the double pulleys. A single pulley is rotatably installed on one side of the two synchronous belts. A rotating shaft is fixedly installed on the inner wall of the two single pulleys. The two rotating shafts are rotatably installed on the inner wall of the steam generator shell.

[0016] In a preferred embodiment, a convex plate is fixedly installed on the top of the two rotating shafts, and a cover ring is provided on one side of the two convex plates. The cover ring is fixedly installed on the inner wall of the steam generator shell and covers one side of the front heat exchange flue and the rear heat exchange flue. A pressure plate is slidably installed on the inner wall of the cover ring, and the outer wall of the pressure plate is in contact with the inner wall of the cover ring. The outer wall of the pressure plate is correspondingly arranged with the convex plate. A support spring is fixedly installed on the outer wall of the pressure plate and is fixedly installed on the inner wall of the steam generator shell.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. The present invention is achieved by setting up a residual smoke pushing mechanism and an intermittent smoke exhaust mechanism in combination. Multiple heat conduction chambers are set in the area at the end of the heat exchange flue. Hot flue gas is sent into the heat conduction chamber by a reciprocating pusher plate. Multiple baffles in the heat conduction chamber allow the hot flue gas to conduct heat to the heat conduction chamber as much as possible. The heat conduction chamber then conducts the heat to the water again, which facilitates the improvement of the heat utilization effect of the hot flue gas.

[0019] 2. At the same time, by setting up a pressure pushing mechanism, a hood ring and a pressure plate are set at the flue gas exchange position. The hot flue gas is directly squeezed into the heat exchange flue tube by its reciprocating movement, which reduces the residence time of the high-temperature flue gas and avoids the waste of heat from the high-temperature flue gas. Attached Figure Description

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

[0021] Figure 2 This is an internal front view of the present invention.

[0022] Figure 3 This is a schematic diagram of the residual smoke pushing mechanism in this invention.

[0023] Figure 4 This is a partial cross-sectional view of the residual smoke pushing mechanism in this invention.

[0024] Figure 5 This is a vertical sectional view of the intermittent smoke exhaust mechanism in this invention.

[0025] Figure 6 This is a schematic diagram of the pressure pushing mechanism in this invention.

[0026] Figure 7 This is a partial cross-sectional view of the pressure pushing mechanism in this invention.

[0027] The attached diagram is labeled as follows: 1. Steam generator shell; 2. Heating furnace; 3. Front heat exchange flue; 4. Rear heat exchange flue; 5. Exhaust port; 6. Residual smoke pushing mechanism; 61. Motor; 62. Rotating rod; 63. Turntable; 64. Push rod; 65. Belt plate; 66. Pushing rod; 67. Partition plate; 68. Guide plate; 69. Heat transfer chamber; 610. Expansion plate; 611. Push plate; 612. Rubber pad; 613. Sealing plate; 7. Intermittent smoke exhaust mechanism; 71. Partition plate; 72. Balustrade plate; 73. Air guide pipe; 74. Cover plate; 75. Limiting spring; 8. Pressing mechanism; 81. Double pulley; 82. Synchronous belt; 83. Single pulley; 84. Rotating shaft; 85. Protruding plate; 86. Cover ring; 87. Pressure plate; 88. Support spring. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1: Refer to the appendix of the instruction manual. Figures 1-7 Heat pipe steam generators based on boiler flue gas waste heat utilization, such as Figure 1 and Figure 2 As shown, it includes a steam generator housing 1, a heating furnace 2 is installed inside the steam generator housing 1, a front heat exchange flue 3 is installed on one side of the heating furnace 2, a rear heat exchange flue 4 is installed on both sides of the front heat exchange flue 3, and a flue outlet 5 is installed on the top of the steam generator housing 1.

[0030] A residual smoke pushing mechanism 6 and an intermittent smoke exhaust mechanism 7 are provided on one side of the rear heat exchange flue duct 4, such as... Figure 3 and Figure 4 As shown, the residual smoke pushing mechanism 6 includes a motor 61 fixedly installed at the bottom of the steam generator housing 1. The top of the motor 61 is provided with a rotating rod 62, which is rotatably installed on the inner wall of the steam generator housing 1. A turntable 63 is fixedly installed on the top of the rotating rod 62. The turntable 63 is set in a horizontal state. A push rod 64 is fixedly installed at the eccentric part of the top of the turntable 63. A belt plate 65 is provided on the outer wall of the push rod 64. The belt plate 65 is set in a horizontal state. When the motor 61 drives the rotating rod 62 to rotate, the rotating rod 62 drives the turntable 63 and the push rod 64 to rotate in a circular motion, which in turn drives the belt plate 65 to move back and forth.

[0031] like Figure 3 and Figure 4As shown, multiple push rods 66 are fixedly installed on the outer wall of the belt plate 65. The belt plate 65 drives the multiple push rods 66 to move back and forth. A partition plate 67 is slidably installed on one side of the multiple push rods 66. The partition plate 67 is fixedly installed on the inner wall of the steam generator shell 1. Two guide plates 68 are fixedly installed on one side of the partition plate 67. The two guide plates 68 are set in an inclined state. The two guide plates 68 are set in a corresponding manner with the rear heat exchange flue 4. The hot flue gas sent from the rear heat exchange flue 4 is intercepted by the partition plate 67 and the two guide plates 68.

[0032] like Figure 3 and Figure 4 As shown, a heat-conducting chamber 69 is provided on one side of a plurality of push rods 66. The plurality of heat-conducting chambers 69 are fixedly installed on the inner wall of the steam generator housing 1. The plurality of heat-conducting chambers 69 are arranged vertically and parallel to each other. An expansion plate 610 is fixedly installed on the outer wall of the plurality of heat-conducting chambers 69. The plurality of heat-conducting chambers 69 extend into the steam generator housing 1 and achieve the same heat conduction effect as the front heat exchange flue 3 and the rear heat exchange flue 4.

[0033] like Figure 4 As shown, the inner walls of multiple heat-conducting chambers 69 are provided with push plates 611. The push plates 611 are fixedly installed on the outer walls of the push rods 66. The push plates 611 are set in a vertical position. The outer walls of the push plates 611 are fixedly installed with rubber pads 612. The outer walls of the rubber pads 612 are in contact with the inner walls of the heat-conducting chambers 69. The multiple push rods 66 drive the push plates 611 and the rubber pads 612 to send the hot flue gas discharged from the rear heat exchange flue pipe 4 into the heat-conducting chambers 69. The inner walls of the push plates 611 are provided with ventilation grooves. A sealing plate 613 is provided on one side of the ventilation grooves. The sealing plate 613 is rotatably installed on the outer walls of the push plates 611. When the push plates 611 move back, their ventilation grooves and sealing plates 613 are opened by pressure, so that the hot flue gas discharged from the rear heat exchange flue pipe 4 can re-enter.

[0034] like Figure 2 and Figure 5 As shown, the intermittent smoke exhaust mechanism 7 includes a partition plate 71 fixedly installed on the inner wall of the bottom of the heat conduction chamber 69. The length of the partition plate 71 is less than the length of the inner wall of the heat conduction chamber 69. Multiple baffles 72 are fixedly installed on the inner wall of the heat conduction chamber 69. The multiple baffles 72 are arranged in an alternating manner and are arranged corresponding to the partition plate 71. The hot flue gas sent into the heat conduction chamber 69 is evenly dispersed through the partition plate 71 and the multiple baffles 72, so that its heat can be fully transferred to the heat conduction chamber 69.

[0035] like Figure 5As shown, the bottom of the heat conduction chamber 69 is connected to a gas guide pipe 73. A cover plate 74 is provided on one side of the gas guide pipe 73. The cover plate 74 is rotatably installed on the inner wall of the steam generator housing 1. A limit spring 75 is fixedly installed on the outer wall of the cover plate 74. When hot flue gas enters the heat conduction chamber 69, the original airflow in the heat conduction chamber 69 is compressed and discharged from the gas guide pipe 73, pushing open the cover plate 74 and the limit spring 75. When the push plate 611 in the heat conduction chamber 69 moves back, the cover plate 74 is closed under the action of the limit spring 75 to prevent the airflow from flowing back.

[0036] In specific implementation, the motor 61 drives the rotating rod 62 to rotate. When the rotating rod 62 drives the turntable 63 and the push rod 64 to rotate in a circle, it drives the belt plate 65 to move back and forth. The belt plate 65 drives multiple push rods 66 to move back and forth. The multiple push rods 66 drive the push plate 611 and the rubber pad 612 to send the hot flue gas discharged from the rear heat exchange flue pipe 4 into the heat conduction chamber 69.

[0037] Furthermore, the hot flue gas fed into the heat conduction chamber 69 is evenly dispersed by the partition plate 71 and multiple baffles 72, which facilitates the full transfer of its heat to the heat conduction chamber 69. When the hot flue gas enters the heat conduction chamber 69, the original airflow in the heat conduction chamber 69 is compressed and discharged from the air guide pipe 73, which pushes open the cover plate 74 and the limiting spring 75. The heat of the hot flue gas is absorbed by the heat conduction chamber 69 and then transferred to the water, which facilitates the improvement of the heat utilization effect of the hot flue gas.

[0038] When the push plate 611 moves back, its ventilation groove and sealing plate 613 are opened by pressure, which makes it easier for the hot flue gas discharged from the rear heat exchange flue pipe 4 to re-enter. At the same time, the cover plate 74 is closed by the limit spring 75 to prevent airflow backflow.

[0039] Example 2: Figure 6 and Figure 7 As shown, a pressing mechanism 8 is provided on one side of the front heat exchange flue duct 3. The pressing mechanism 8 includes a double pulley 81 fixedly installed on the outer wall of the rotating rod 62. Two synchronous belts 82 are rotatably installed on the outer wall of the double pulley 81. A single pulley 83 is rotatably installed on one side of the two synchronous belts 82. A rotating shaft 84 is fixedly installed on the inner wall of the two single pulleys 83. The two rotating shafts 84 are rotatably installed on the inner wall of the steam generator shell 1. The rotation of the rotating rod 62 drives the double pulley 81 to rotate synchronously, and then the single pulleys 83 and the rotating shafts 84 on both sides rotate synchronously through the two synchronous belts 82.

[0040] like Figure 7As shown, two rotating shafts 84 are fixedly mounted on the top of a convex plate 85. A cover ring 86 is provided on one side of the two convex plates 85. The cover ring 86 is fixedly mounted on the inner wall of the steam generator shell 1. The cover ring 86 covers one side of the front heat exchange flue 3 and the rear heat exchange flue 4. A pressure plate 87 is slidably mounted on the inner wall of the cover ring 86. The outer wall of the pressure plate 87 is in contact with the inner wall of the cover ring 86. The outer wall of the pressure plate 87 and the convex plate 85 are arranged in a corresponding manner. Then, the two rotating shafts 84 drive the convex plates 85 to rotate.

[0041] The surface of the pressure plate 87 is pressed by the protruding plate 85. At this time, the pressure plate 87 drives the cover ring 86 to move forward and cover one side of the front heat exchange flue pipe 3 and the rear heat exchange flue pipe 4. The hot flue gas coming from the front heat exchange flue pipe 3 is restricted. A support spring 88 is fixedly installed on the outer wall of the pressure plate 87. The support spring 88 is fixedly installed on the inner wall of the steam generator housing 1. Then, the pressure plate 87 moves forward and compresses the support spring 88. At this time, the pressure plate 87 presses the hot flue gas in the cover ring 86 into the rear heat exchange flue pipe 4.

[0042] In practice, the rotating rod 62 rotates, causing the double pulleys 81 to rotate synchronously. This, in turn, causes the single pulleys 83 and the rotating shafts 84 on both sides to rotate synchronously via the two synchronous belts 82. The rotating shafts 84 on both sides then drive the convex plates 85 to rotate. The convex plates 85 press the surface of the pressure plate 87. At this time, the pressure plate 87 causes the cover ring 86 to move forward and cover one side of the front heat exchange flue pipe 3 and the rear heat exchange flue pipe 4. The hot flue gas coming from the front heat exchange flue pipe 3 is restricted. Then, the pressure plate 87 moves forward and compresses the support spring 88. At this time, the pressure plate 87 presses the hot flue gas in the cover ring 86 into the rear heat exchange flue pipe 4.

[0043] As shown above, the hot flue gas is sent into multiple heat-conducting chambers in the end area of ​​the heat exchange flue tube by a reciprocating pusher plate. The heat-conducting chambers absorb the residual heat of the hot flue gas and then transfer the heat back to the water, which facilitates the improvement of the heat utilization efficiency of the hot flue gas. The hood ring and pressure plate are set at the flue gas exchange position to facilitate the direct compression of the hot flue gas in the exchange stage into the heat exchange flue tube, reduce the residence time of the high-temperature flue gas, and avoid the waste of heat from the high-temperature flue gas.

[0044] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0045] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0046] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. Boiler flue gas heat utilization based heat pipe steam generator, including steam generator shell (1), the inside of steam generator shell (1) is provided with heating furnace (2), one side of heating furnace (2) is provided with front heat exchange flue (3), both sides of front heat exchange flue (3) are provided with rear heat exchange flue (4), the top of steam generator shell (1) is provided with flue gas outlet (5), it is characterized by: One side of rear heat exchange flue (4) is provided with residual smoke pushing mechanism (6) and intermittent flue gas discharge mechanism (7), residual smoke pushing mechanism (6) includes motor (61) fixedly installed at the bottom of steam generator shell (1), the top of motor (61) is equipped with rotating rod (62), rotating rod (62) is rotatably installed on the inner wall of steam generator shell (1); The top of rotating rod (62) is fixedly installed with rotating disc (63), rotating disc (63) is arranged in horizontal state, the top of rotating disc (63) is fixedly installed with push rod (64) at eccentric position, the outer wall of push rod (64) is provided with band plate (65), and the band plate (65) is arranged in horizontal state.

2. The boiler flue gas heat recovery based heat pipe steam generator according to claim 1, characterized in that: The outer wall of band plate (65) is fixedly installed with a plurality of push rods (66), a plurality of push rods (66) are slidably installed with partition plate (67) on one side, and the partition plate (67) is fixedly installed on the inner wall of steam generator shell (1). One side of the partition plate (67) is fixedly installed with two guide plates (68), and the two guide plates (68) are arranged in inclined state and correspondingly arranged with the rear heat exchange flue (4).

3. The boiler flue gas heat recovery based heat pipe steam generator according to claim 2, characterized in that: One side of a plurality of push rods (66) is provided with heat conduction bin (69), a plurality of heat conduction bins (69) are fixedly installed on the inner wall of steam generator shell (1), a plurality of heat conduction bins (69) are arranged in vertical state, a plurality of heat conduction bins (69) are arranged in parallel, and a plurality of heat conduction bins (69) are fixedly installed with expansion plate (610) on the outer wall.

4. The heat pipe steam generator based on the flue gas waste heat utilization of the boiler according to claim 3, characterized in that: The inner wall of a plurality of heat conduction bins (69) is provided with push plate (611), the push plate (611) is fixedly installed on the outer wall of push rod (66), the push plate (611) is arranged in vertical state, the outer wall of push plate (611) is fixedly installed with rubber pad (612), the outer wall of rubber pad (612) is matched with the inner wall of heat conduction bin (69), the inner wall of push plate (611) is provided with air passage, one side of the air passage is provided with sealing plate (613), and the sealing plate (613) is rotatably installed on the outer wall of push plate (611).

5. The boiler flue gas heat recovery based heat pipe steam generator as claimed in claim 3 wherein: The intermittent flue gas discharge mechanism (7) includes partition plate (71) fixedly installed on the inner wall at the bottom of heat conduction bin (69), the length of partition plate (71) is less than the length of the inner wall of heat conduction bin (69), and a plurality of fence plates (72) are fixedly installed on the inner wall of heat conduction bin (69). A plurality of fence plates (72) are arranged in interlaced manner, and a plurality of fence plates (72) are correspondingly arranged with partition plate (71).

6. The boiler flue gas heat recovery based heat pipe steam generator according to claim 4, wherein: The bottom of the heat-conducting bin (69) is communicated with a gas guide pipe (73), one side of the gas guide pipe (73) is provided with a cover plate (74), the cover plate (74) is rotationally installed on the inner wall of the steam generator shell (1), the outer wall of the cover plate (74) is fixedly installed with a limiting spring (75), and the limiting spring (75) is fixedly installed on the inner wall of the steam generator shell (1).

7. The boiler flue gas heat recovery based heat pipe steam generator according to claim 1, wherein: The front heat exchange smoke pipe (3) is provided with a pressing mechanism (8) on one side, the pressing mechanism (8) comprises a double belt wheel (81) fixedly installed on the outer wall of the rotating rod (62), the outer wall of the double belt wheel (81) is rotationally installed with two synchronous belts (82), one side of the two synchronous belts (82) is rotationally installed with a single belt wheel (83), the inner wall of the two single belt wheels (83) is fixedly installed with a rotating shaft (84), and the two rotating shafts (84) are rotationally installed on the inner wall of the steam generator shell (1).

8. The boiler flue gas heat recovery based heat pipe steam generator as claimed in claim 7 wherein: The top of the two rotating shafts (84) is fixedly installed with a push plate (85), two push plates (85) are provided with a cover ring (86) on one side, the cover ring (86) is fixedly installed on the inner wall of the steam generator shell (1), the cover ring (86) covers one side of the front heat exchange smoke pipe (3) and the rear heat exchange smoke pipe (4), the inner wall of the cover ring (86) is slidably installed with a pressing plate (87), the outer wall of the pressing plate (87) is attached to the inner wall of the cover ring (86), the outer wall of the pressing plate (87) is correspondingly arranged with the push plate (85), the outer wall of the pressing plate (87) is fixedly installed with a supporting spring (88), and the supporting spring (88) is fixedly installed on the inner wall of the steam generator shell (1).

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