A heat recovery device for steam turbine condensate in a thermal power plant

Abstract

This utility model provides a heat recovery device for steam turbine condensate in a thermal power plant, relating to the field of heat energy recovery and utilization technology. The device includes a base. By incorporating a dustproof device, the sealing mechanism can be activated to open the bottom of the protective cover. Air entering the cover is first filtered by a filter screen, removing dust and impurities. The air then enters the cover, allowing the air inside the control box to connect with the external environment through heat dissipation holes, thus preventing dust and blockage at the holes. Simultaneously, a cooling mechanism is activated to cool the air before drawing it into the cover, accelerating airflow and facilitating heat exchange with the hot air inside the control box, thereby reducing the internal temperature. This, combined with the heat dissipation holes, effectively prevents overheating damage to the control box, extends its service life, and reduces equipment maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of heat energy recovery and utilization technology, and in particular to a heat recovery device for steam turbine condensate in a thermal power plant. Background Technology

[0002] A heat recovery device is a device used to recover the heat contained in the condensate discharged from a steam turbine. Condensate refers to the water generated in the steam system due to the discharge of condensate and impurities. This water usually contains a certain amount of heat energy. By recovering the heat in this condensate, it can be converted into useful heat energy and reused in the feedwater or other processes of the heating system, thereby improving the energy efficiency of the thermal power plant and reducing energy waste.

[0003] The heat recovery device is controlled by a control box mounted on the base. It transports the condensate discharged from the turbine to the inner pipes of the heat exchanger, transferring heat from the condensate to the cold water entering the boiler or other systems, thus raising the water temperature. The control box then activates the condensate pump to pump the heated feedwater into the boiler or other systems for use, achieving efficient recovery and reuse of waste heat from the condensate and improving the unit's thermal efficiency. During the heat recovery process, the electrical equipment inside the control box generates heat, which accumulates inside the box, causing the internal temperature to rise continuously. Traditional heat dissipation methods typically rely on natural convection through several ventilation holes on both sides of the control box. However, the heat dissipation effect is greatly affected by environmental factors, and dust and impurities in the air easily accumulate around the ventilation holes, causing blockage and affecting heat dissipation efficiency. This increases the operating temperature of the equipment and may even lead to overheating and damage, increasing maintenance costs. Utility Model Content

[0004] The purpose of this invention is to provide a heat recovery device for steam turbine condensate in thermal power plants, which aims to solve the problems in the prior art.

[0005] The technical problem this invention aims to solve is that during the heat recovery process in the condensate, the electrical equipment inside the control box generates heat during use. This heat accumulates inside the control box, causing the internal temperature to rise continuously. Traditional heat dissipation methods typically rely on opening several heat dissipation holes on both sides of the control box for natural convection heat dissipation. However, the heat dissipation effect is greatly affected by environmental factors, and dust and impurities in the air easily accumulate around the heat dissipation holes, causing them to become blocked. This, in turn, affects the heat dissipation efficiency, increases the operating temperature of the equipment, and may even lead to overheating and damage to the equipment, increasing maintenance costs.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a heat recovery device for steam turbine condensate in a thermal power plant, including a base, a control box fixedly installed on one side of the base, and several heat dissipation holes on both sides of the inner wall of the control box. A condensate pump is installed on one side of the base, and a heat exchanger is installed on another side of the base. The heat exchanger and the condensate pump are connected by a pipe. Dustproof devices are installed on both sides of the control box at the heat dissipation holes. The dustproof devices can achieve the effect of preventing dust and blockage by installing a protective cover and a filter screen on one side of the control box to cover the heat dissipation holes. At the same time, the cooling mechanism assists the heat dissipation holes in heat dissipation.

[0007] Preferably, the dustproof device includes a protective cover, one side of which is fixedly installed on one side of the control box; a filter screen, the filter screen being fixedly installed between the inner wall of the protective cover and one side of the control box; a cooling mechanism, the cooling mechanism being disposed at the top of the inner wall of the protective cover, used to accelerate air circulation inside the protective cover, reduce air temperature, and assist in heat dissipation through the heat dissipation holes; a cleaning mechanism, the cleaning mechanism being disposed on one side of the filter screen, used to clean the surface of the filter screen; and a sealing mechanism, the sealing mechanism being disposed in the bottom inner wall of the protective cover, used to guide the air discharged from the heat dissipation holes, and to seal the bottom of the control box when it is not in use.

[0008] The aforementioned components achieve the following effects: By installing a dustproof device, the sealing mechanism can be activated to open the bottom of the protective cover. Air entering the cover will first pass through a filter screen, filtering out dust and impurities. The air then enters the cover, allowing the air inside the control box to connect with the external environment through the heat dissipation vents, thus preventing dust and blockage at the vents. Simultaneously, the cooling mechanism cools the air before drawing it into the cover, accelerating airflow and exchanging heat with the hot air inside the control box to lower its internal temperature. This assists the heat dissipation vents in cooling the control box, effectively preventing overheating damage, extending the control box's lifespan, and reducing equipment maintenance costs. The cleaning mechanism moves back and forth on one side of the filter screen to remove the filtered dust and impurities.

[0009] Preferably, the cooling mechanism includes a blower box, wherein one side of the blower box is fixedly mounted on one side of the protective cover; a thermoelectric cooler, wherein the inner wall of the thermoelectric cooler is fixedly mounted on the outer surface of the protective cover; an air pump, wherein the output end of the air pump is installed through one side of the protective cover; and an air duct, wherein one end of the air duct passes through one side of the inner wall of the protective cover and extends into the inner wall of the blower box.

[0010] The effects achieved by the above components are as follows: By setting up a cooling mechanism, when the control box is in use, the air pump can be started to draw outside air into the air box. Then, after the semiconductor cooling chip is energized, the surface temperature of the air box is reduced. In this way, after the air enters the inner wall of the air box, it will exchange heat with the inside of the air box to reduce the temperature. Then, it is blown into the inside of the protective cover through the air guide pipe, which accelerates the air circulation inside the protective cover and exchanges heat with the hot air inside the control box to reduce the temperature inside the control box. The auxiliary heat dissipation holes dissipate heat from the inside of the control box, improve the heat dissipation effect, thereby effectively avoiding the problem of overheating damage to the control box, increasing the service life of the control box, and reducing equipment maintenance costs.

[0011] Preferably, both ends of the air duct are fixedly mounted with a round hole bracket, wherein one side of the round hole bracket is fixedly mounted on the inner wall of the protective cover.

[0012] The effect achieved by the above components is that by setting the round hole frame, the air duct can be supported and reinforced, making it less prone to shaking during use.

[0013] Preferably, a plurality of guide plates are fixedly installed on the inner wall of the wind box, wherein the plurality of guide plates are symmetrically and alternately distributed in the inner wall of the wind box.

[0014] The effect achieved by the above components is that by setting up the baffle, the airflow speed and time in the air box can be extended, allowing it to fully contact the inner wall of the air box and achieve a rapid cooling effect.

[0015] Preferably, the cleaning mechanism includes an electric telescopic rod, one side of which is fixedly mounted on one side of the inner wall of the protective cover; and a brush, one side of which is fixedly mounted on the output end of the electric telescopic rod.

[0016] The effect achieved by the above components is as follows: by setting up a cleaning mechanism, when the filter screen is used to intercept dust and impurities in the outside air, the electric telescopic rod can be activated to drive the brush to move back and forth on one side of the filter screen to clean off the dust and impurities. Then, in conjunction with the air discharged by the cooling mechanism, the cleaned dust and impurities are blown out of the protective cover to prevent the filter screen from becoming clogged.

[0017] Preferably, the sealing mechanism includes a sealing plate, wherein the two ends of the sealing plate are respectively installed through and on both sides of the inner wall of the protective cover, and a plurality of slots are provided on one side of the protective cover; a locking rod, wherein one end of the locking rod is slidably installed in the inner wall of one end of the sealing plate, and the other end is inserted into the inner wall of the slot.

[0018] The effect achieved by the above-mentioned components is as follows: by setting up a sealing mechanism, when the control box is in use, one end of the sealing plate can be manually held and rotated to a certain angle to open the bottom of the protective cover. Then, the locking rod can be slid in the inner wall of one end of the sealing plate to a certain position so that one end of it can be locked into the slot, thereby fixing the sealing plate after it has been rotated to a certain angle. When the control box is not in use, the opposite operation can be performed to use the sealing plate to seal the bottom of the protective cover, thereby improving the protective effect of the protective cover.

[0019] Preferably, the sealing mechanism further includes a spring, wherein the inner wall of the spring is sleeved on the outer surface of one end of the clamp rod, and both ends are respectively fixedly installed on one side of the clamp rod and one side of the sealing plate.

[0020] The effect achieved by the above components is as follows: by setting a spring, when it is necessary to rotate the sealing plate, the clamp rod can be pulled out of the slot first, which will cause the spring to stretch. Then, after adjustment, when the clamp rod is released, the spring will drive the clamp rod to reset and lock into the slot, making the connection more secure.

[0021] The beneficial effects of this utility model are:

[0022] By installing a dustproof device, the sealing mechanism can be activated to open the bottom of the protective cover. Air entering the cover will first pass through a filter screen, filtering out dust and impurities. The air then enters the cover, allowing the air inside the control box to connect with the external environment through the ventilation holes, effectively preventing dust and blockage at the ventilation holes. Simultaneously, the cooling mechanism cools the air before drawing it into the cover, accelerating airflow and exchanging heat with the hot air inside the control box to lower its internal temperature. This assists the ventilation holes in dissipating heat from the inside of the control box, effectively preventing overheating damage, extending the control box's lifespan, and reducing equipment maintenance costs. The cleaning mechanism moves back and forth on one side of the filter screen to remove the filtered dust and impurities. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a three-dimensional structural diagram of the heat exchanger of this utility model;

[0025] Figure 3 for Figure 2 An enlarged 3D structural diagram at point A in the middle;

[0026] Figure 4 This is a three-dimensional structural diagram of the protective cover of this utility model;

[0027] Figure 5This is a three-dimensional structural diagram of the filter screen of this utility model;

[0028] Figure 6 for Figure 5 A three-dimensional schematic diagram of a local structure.

[0029] Legend: 1. Base; 2. Dustproof device; 3. Control box; 4. Heat dissipation hole; 5. Drain pump; 6. Heat exchanger; 21. Protective cover; 22. Filter screen; 23. Cooling mechanism; 231. Air box; 232. Semiconductor cooling chip; 233. Air pump; 234. Air duct; 235. Circular hole frame; 236. Deflector plate; 24. Cleaning mechanism; 241. Electric telescopic rod; 242. Brush; 25. Sealing mechanism; 251. Sealing plate; 252. Locking rod; 253. Locking slot; 254. Spring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0031] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0033] In this embodiment:

[0034] Figure 1-6The illustrated heat recovery device for steam turbine condensate in a thermal power plant includes a base 1. A control box 3 is fixedly installed on one side of the base 1. Several heat dissipation holes 4 are provided on both sides of the inner wall of the control box 3. A condensate pump 5 (model 250NW-44X3) and a heat exchanger 6 (model RV-04) are installed on one side of the base 1. The heat exchanger 6 and the condensate pump 5 are connected by pipes. Dustproof devices 2 are installed on both sides of the control box 3 at the heat dissipation holes 4. The dustproof devices 2 cover the heat dissipation holes 4 by installing a protective cover 21 and a filter screen 22 on one side of the control box 3 to achieve dust prevention and anti-clogging effects. Simultaneously, they work in conjunction with a cooling mechanism 23 to assist in heat dissipation through the heat dissipation holes 4. It should be noted that the condensate pump 5 and the heat exchanger 6 are mature technologies and equipment in the prior art; their internal structure, connection methods, and principles will not be elaborated further.

[0035] Figure 1-6The dustproof device 2 shown includes a protective cover 21, one side of which is fixedly installed on one side of the control box 3; a filter screen 22, which is fixedly installed between the inner wall of the protective cover 21 and one side of the control box 3; a cooling mechanism 23, which is located at the top of the inner wall of the protective cover 21 to accelerate the air circulation inside the protective cover 21, reduce the air temperature, and assist the heat dissipation holes 4 in heat dissipation; a cleaning mechanism 24, which is located on one side of the filter screen 22 to clean the surface of the filter screen 22; and a sealing mechanism 25, which is located in the bottom inner wall of the protective cover 21 to guide the air discharged from the heat dissipation holes 4 and to seal the bottom of the control box 3 when it is not in use. By installing a dustproof device 2, the heat recovery device is controlled by a control box 3 installed on the base 1. The condensate discharged from the turbine is transported to the inner wall pipes of the heat exchanger 6. Heat in the condensate is transferred to the cold water entering the boiler or other systems via heat transfer, thereby increasing the water temperature. Then, the control box 3 controls the start of the condensate pump 5 to pump the heated feedwater into the boiler or other systems for use, thus achieving efficient recovery and reuse of waste heat from the condensate and improving the unit's thermal efficiency. During the heat recovery process in the condensate, the control box 3 can activate the sealing mechanism 25 to open the bottom of the protective cover 21. This allows air entering the protective cover 21 to be filtered and intercepted by the filter screen 22, preventing dust and other contaminants from entering. Impurities are filtered out, and air enters the interior of the protective cover 21, allowing the air inside the control box 3 to connect with the air in the external environment through the heat dissipation holes 4. This achieves the effect of preventing dust and blockage at the heat dissipation holes 4. At the same time, the cooling mechanism 23 is activated to cool the air before drawing it into the protective cover 21, accelerating the air circulation inside the protective cover 21 and exchanging heat with the hot air inside the control box 3 to reduce the internal temperature of the control box 3. This assists the heat dissipation holes 4 in heat dissipating the internal heat of the control box 3, thereby effectively preventing the control box 3 from overheating and being damaged, increasing the service life of the control box 3, and reducing equipment maintenance costs. The cleaning mechanism 24 moves back and forth on one side of the filter screen to clean away the dust and impurities filtered out.

[0036] Figure 1-6The cooling mechanism 23 shown includes a blower box 231, one side of which is fixedly mounted on one side of a protective cover 21; a thermoelectric cooler 232 (model TEC1-12706), the inner wall of which is fixedly mounted on the outer surface of the protective cover 21; an air pump 233 (model TH series mini pumps), the output end of which is installed through one side of the protective cover 21; and an air duct 234, one end of which passes through one side of the inner wall of the protective cover 21 and extends into the inner wall of the blower box 231. By setting up a cooling mechanism 23, when the control box 3 is in use, the air pump 233 can be activated to draw outside air into the air box 231. Then, after the semiconductor cooling chip 232 is energized, the surface temperature of the air box 231 is reduced. Thus, after the air enters the inner wall of the air box 231, heat exchange occurs upon contact with the interior of the air box 231, lowering its temperature. The air is then blown into the protective cover 21 through the air duct 234, accelerating airflow within the protective cover 21 and exchanging heat with the hot air inside the control box 3 to further reduce its internal temperature. The auxiliary heat dissipation holes 4 further enhance heat dissipation, effectively preventing overheating damage to the control box 3, extending its service life, and reducing equipment maintenance costs. Both ends of the air duct 234 are fixedly mounted with round hole brackets 235, one side of which is fixedly mounted on the inner wall of the protective cover 21. By setting the round hole brackets 235, the air duct 234 can be supported and reinforced, preventing it from shaking during use. Several guide plates 236 are fixedly installed on the inner wall of the air box 231, and these guide plates 236 are symmetrically and alternately distributed in the inner wall of the air box 231. By setting the guide plates 236, the airflow speed and time in the air box 231 can be extended, allowing it to fully contact the inner wall of the air box 231 and achieve a rapid cooling effect. It should be noted that the semiconductor cooling chip 232 and the air pump 233 are mature technologies and equipment in the prior art, and their internal structure, connection method and principle will not be described further.

[0037] Figure 1-6 The cleaning mechanism 24 shown includes an electric telescopic rod 241, one side of which is fixedly mounted on the inner wall of the protective cover 21; and a brush 242, one side of which is fixedly mounted on the output end of the electric telescopic rod 241. By setting up the cleaning mechanism 24, when the filter 22 is used to intercept dust and impurities in the outside air, the electric telescopic rod 241 can be activated to drive the brush 242 to move back and forth on one side of the filter 22, cleaning off the dust and impurities. Then, in conjunction with the air discharged from the cooling mechanism 23, the cleaned dust and impurities are blown out of the protective cover 21, preventing the filter 22 from becoming clogged.

[0038] Figure 1-6 The sealing mechanism 25 shown includes a sealing plate 251, with both ends of the sealing plate 251 respectively installed through and on both sides of the inner wall of the protective cover 21. A plurality of slots 253 are provided on one side of the protective cover 21. A locking rod 252 is also included, with one end slidably installed in the inner wall of one end of the sealing plate 251 and the other end inserted into the inner wall of the slot 253. By setting up the sealing mechanism 25, when the control box 3 is in use, one end of the sealing plate 251 can be manually held and rotated to a certain angle to open the bottom of the protective cover 21. Then, the locking rod 252 can be slid in the inner wall of one end of the sealing plate 251 to a certain position, so that one end is locked into the slot 253, thereby fixing the sealing plate 251 after it has been rotated to a certain angle. When the control box 3 is not in use, the opposite operation can be performed, using the sealing plate 251 to seal the bottom of the protective cover 21, improving the protective effect of the protective cover 21. The sealing mechanism 25 also includes a spring 254, the inner wall of which is sleeved on the outer surface of one end of the clamping rod 252, and both ends are fixedly installed on one side of the clamping rod 252 and one side of the sealing plate 251, respectively. By setting the spring 254, when it is necessary to rotate the sealing plate 251, the clamping rod 252 can be pulled out from the slot 253 first, causing the spring 254 to stretch. Then, after adjustment, when the clamping rod 252 is released, the spring 254 will drive the clamping rod 252 to reset and lock into the slot 253, making the engagement more secure.

[0039] Working principle: The heat recovery device is controlled by the control box 3 installed on the base 1. The condensate discharged from the steam turbine is transported to the inner wall pipes of the heat exchanger 6. Heat in the condensate is transferred to the cold water entering the boiler or other systems via heat transfer, thereby increasing the water temperature. Then, the control box 3 controls the start of the condensate pump 5 to pump the heated feedwater into the boiler or other systems for use, thus achieving efficient recovery and reuse of waste heat from the condensate and improving the unit's thermal efficiency. During the heat recovery process in the condensate, when using the control box 3, first, the lever 252 is removed from the... Pulling the plate out of slot 253 stretches the spring 254. Then, manually hold one end of the sealing plate 251 and rotate it to a certain angle, opening the bottom of the protective cover 21. Releasing the lever 252 causes the spring 254 to reset the lever 252, locking it into slot 253 and fixing the sealing plate 251 in place. This allows air entering the protective cover 21 to pass through filter 22, filtering out dust and impurities before entering the interior of the protective cover 21. This allows the air inside the control box 3 to be exposed to the external environment through the heat dissipation holes 4. The air is connected, achieving the effect of preventing dust and blockage at the four heat dissipation holes. At the same time, the air pump 233 can be activated to draw outside air into the air box 231. Then, after the semiconductor cooling chip 232 is energized, the surface temperature of the air box 231 is reduced. In this way, after the air enters the inner wall of the air box 231, heat exchange occurs when it comes into contact with the inside of the air box 231, reducing the temperature. Then, it is blown into the interior of the protective cover 21 through the air guide pipe 234, accelerating the air circulation inside the protective cover 21 and exchanging heat with the hot air inside the control box 3 to reduce the internal temperature of the control box 3, thus assisting in heat dissipation. Hole 4 provides heat dissipation for the interior of control box 3, improving heat dissipation efficiency and effectively preventing overheating damage to control box 3, extending its service life, and reducing equipment maintenance costs. When filter screen 22 intercepts dust and impurities in the outside air, the electric telescopic rod 241 can be activated to drive brush 242 to move back and forth on one side of filter screen 22 to clean off the dust and impurities. Then, the air discharged by cooling mechanism 23 blows the cleaned dust and impurities out of protective cover 21, preventing filter screen 22 from becoming clogged.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat recovery device for draining steam from a turbine of a thermal power plant, comprising a base (1), characterised in that: A control box (3) is fixedly installed on one side of the base (1). Several heat dissipation holes (4) are opened on both sides of the inner wall of the control box (3). A condensate pump (5) is provided on one side of the base (1). A heat exchanger (6) is provided on one side of the base (1). The heat exchanger (6) and the condensate pump (5) are connected by a pipe. Dustproof devices (2) are provided on both sides of the control box (3) at the heat dissipation holes (4). The dustproof devices (2) can cover the heat dissipation holes (4) by installing a protective cover (21) and a filter screen (22) on one side of the control box (3).

2. The heat recovery device for steam turbine condensate drain in a thermal power plant according to claim 1, characterized in that: The dustproof device (2) includes a protective cover (21), wherein one side of the protective cover (21) is fixedly installed on one side of the control box (3); Filter screen (22), wherein the filter screen (22) is fixedly installed between the inner wall of the protective cover (21) and one side of the control box (3); Cooling mechanism (23), wherein the cooling mechanism (23) is located on the top of the inner wall of the protective cover (21) to accelerate the air circulation inside the protective cover (21) and reduce the air temperature. Auxiliary heat dissipation hole (4) heat dissipation treatment; A cleaning mechanism (24) is provided on one side of the filter screen (22) for cleaning the surface of the filter screen (22); The sealing mechanism (25) is installed in the bottom inner wall of the protective cover (21) to guide the air discharged from the heat dissipation hole (4) and to seal the bottom of the control box (3) when it is not in use.

3. A heat recovery device for draining heat from a steam turbine of a thermal power plant according to claim 2, characterized in that: The cooling mechanism (23) includes a bellows (231), wherein one side of the bellows (231) is fixedly mounted on one side of the protective cover (21); A semiconductor cooling chip (232), wherein the inner wall of the semiconductor cooling chip (232) is fixedly mounted on the outer surface of the protective cover (21); An air pump (233), wherein the output end of the air pump (233) is installed through one side of the protective cover (21); The air duct (234) has one end penetrating one side of the inner wall of the protective cover (21) and extending into the inner wall of the air box (231).

4. A heat recovery device for draining heat from a steam turbine of a thermal power plant according to claim 3, characterized in that: Both ends of the air duct (234) are fixedly installed with round hole brackets (235), one side of which is fixedly installed on the inner wall of the protective cover (21).

5. A heat recovery device for draining heat from a steam turbine of a thermal power plant according to claim 3, characterized in that: The inner wall of the bellows (231) is fixedly equipped with several guide plates (236), which are symmetrically and alternately distributed in the inner wall of the bellows (231).

6. A heat recovery device for draining heat from a steam turbine of a thermal power plant according to claim 2, characterized in that: The cleaning mechanism (24) includes an electric telescopic rod (241), wherein one side of the electric telescopic rod (241) is fixedly installed on one side of the inner wall of the protective cover (21); A brush (242), wherein one side of the brush (242) is fixedly mounted on the output end side of the electric telescopic rod (241).

7. A heat recovery device for draining heat from a steam turbine of a thermal power plant according to claim 2, characterized in that: The sealing mechanism (25) includes a sealing plate (251), wherein the two ends of the sealing plate (251) are respectively installed through the inner wall of the protective cover (21) on both sides, and a plurality of slots (253) are provided on one side of the protective cover (21). A locking rod (252) is provided, wherein one end of the locking rod (252) is slidably installed in the inner wall of one end of the sealing plate (251), and the other end is inserted into the inner wall of the locking groove (253).

8. A heat recovery device for steam turbine condensate drain in a thermal power plant according to claim 7, characterized in that: The sealing mechanism (25) further includes a spring (254), wherein the inner wall of the spring (254) is sleeved on the outer surface of one end of the clamp rod (252), and both ends are fixedly installed on one side of the clamp rod (252) and one side of the sealing plate (251), respectively.

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