Water temperature adjusting mechanism for outlet of high-pressure heater of thermal power plant

Abstract

The utility model relates to the technical field of high pressure heater of thermal power unit, and disclose a kind of outlet water temperature adjusting mechanism of high pressure heater of thermal power plant, including high pressure heater body, the top of high pressure heater body is equipped with water inlet, the bottom of high pressure heater body is equipped with water outlet, the both sides of high pressure heater body bottom are fixedly connected with H type leg, the top of H type leg is equipped with special-shaped box, by the setting of stirring vane, stirring rod, heat dissipation fan, semiconductor heat sink and other parts, high pressure heater body heat dissipation fan can be started when adjusting water temperature, the output end rotation of heat dissipation fan carries out heat dissipation to the hot end of semiconductor heat sink installed in the top of special-shaped box, heat dissipation fan rotates and drives first pulley and second pulley to rotate, first pulley rotates and drives stirring rod to rotate, stirring rod rotates and drives stirring vane to stir and heat dissipation the water source in the inside of special-shaped box.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure heater technology for thermal power units, and in particular to a water temperature regulating mechanism for the outlet of a high-pressure heater in a thermal power plant. Background Technology

[0002] According to patent CN112799447A, a high-pressure heater control method is proposed. This invention discloses a control method for a high-pressure heater. The method involves obtaining a high-pressure heater inlet steam pressure setpoint based on inlet temperature, outlet temperature, and load command parameters. Then, a first output value is obtained based on the high-pressure heater inlet steam pressure setpoint and the inlet steam pressure. A second output value is obtained based on the inlet and outlet temperature difference setpoint, the first output value, and the difference between the inlet and outlet temperatures. Finally, the high-pressure heater inlet steam valve is adjusted based on the feedforward command parameters and the second output value. The inlet steam valve adjustment process uses load command parameters for feedforward adjustment, ensuring rapid adjustment. Simultaneously, the difference between the inlet and outlet temperatures combined with the inlet steam pressure forms feedback adjustment, achieving feedforward and feedback adjustment of the inlet steam valve, thus ensuring stability. Furthermore, the adjustment process uses inlet steam pressure for feedback adjustment, thereby avoiding system adjustment distortion caused by abnormal changes in inlet and outlet temperatures, and improving control accuracy.

[0003] Regarding the above and existing related technologies, the inventors believe that the following defects often exist: During the use of existing high-pressure heaters, due to the lack of active adjustment function for outlet water temperature, the temperature difference between the inlet and outlet is too large, which affects the safety and economy of operation. Under special working conditions such as "zero output" of the low-pressure cylinder, the turbine extraction steam parameters are reduced, and the amount of heated steam is insufficient, which further aggravates the problem of insufficient feedwater heating, resulting in low outlet water temperature and decreased thermal efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the existing technology does not have a mechanism for adjusting the temperature of the water outlet. Therefore, we propose a mechanism for adjusting the outlet water temperature of a high-pressure heater in a thermal power plant.

[0005] To achieve the above objectives, this application adopts the following technical solution: a high-pressure heater outlet water temperature regulating mechanism for thermal power plants, comprising a high-pressure heater body, an inlet at the top of the high-pressure heater body, an outlet at the bottom of the high-pressure heater body, H-shaped legs fixedly connected to both sides of the bottom of the high-pressure heater body, an irregularly shaped box mounted on the top of the H-shaped legs, a stirring blade disposed inside the irregularly shaped box, a stirring rod fixedly connected inside the stirring blade, a first pulley fixedly connected to the outside of the stirring rod, a second pulley disposed on the front of the first pulley, the second pulley and the first pulley being connected by a belt drive, a cooling fan fixedly connected to the inner side of the second pulley, and a semiconductor heat sink communicating with the front of the top of the irregularly shaped box.

[0006] Preferably, a sealing ring is fitted onto the surface of the stirring rod, and the inner side of the sealing ring is fixedly connected to the outer side of the irregularly shaped box.

[0007] Preferably, the top of the front of the irregularly shaped box has an observation window, and the top of the irregularly shaped box has a circular connection port.

[0008] Preferably, the irregularly shaped box has horizontal slots on both sides of the top front end, and the cooling fan is located inside the horizontal slots. The cooling fan is installed by bolts.

[0009] Preferably, air outlets are provided on the top of both sides of the high-pressure heater body, and dustproof nets are fixedly connected inside the air outlets.

[0010] Preferably, a drain outlet is provided at the bottom of the front of the irregularly shaped box, and a control valve is installed at the top of the drain outlet.

[0011] The technical effects and advantages of this utility model are as follows: In this invention, by setting up components such as stirring blades, stirring rods, cooling fans, and semiconductor heat sinks, the cooling fan of the high-pressure heater body can be activated when the water temperature is adjusted. The output end of the cooling fan rotates to dissipate heat from the hot end of the semiconductor heat sink installed on the top of the irregularly shaped box. The rotation of the cooling fan drives the first pulley and the second pulley to rotate. The rotation of the first pulley drives the stirring rod to rotate. The rotation of the stirring rod drives the stirring blades to stir and dissipate heat from the water source inside the irregularly shaped box.

[0012] In this invention, by setting a sealing ring, when the stirring rod rotates under the drive of the transmission, the sealing ring maintains good contact pressure through its elastic deformation characteristics, forming a dynamic sealing effect. This design effectively prevents leakage of water inside the tank during the stirring process, ensuring the airtightness of the water circulation. On the other hand, it also prevents external impurities from entering the tank and contaminating the water quality. The wedge-shaped structure design of the sealing ring further enhances the sealing reliability, maintaining stable sealing performance even when the stirring rod rotates at high speed. Attached Figure Description

[0013] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the H-shaped leg structure of this utility model; Figure 3This is a schematic cross-sectional view of the irregularly shaped box of this utility model; Figure 4 This is a schematic diagram of the cooling fan structure of this utility model.

[0014] Legend: 1. High-pressure heater body; 2. Water inlet; 3. Water outlet; 4. H-shaped leg; 5. Irregularly shaped box; 6. Stirring blade; 7. Stirring rod; 8. First pulley; 9. Second pulley; 10. Cooling fan; 11. Semiconductor heat sink; 12. Sealing ring; 13. Observation window; 14. Circular connection port; 15. Horizontal groove; 16. Bolt; 17. Air outlet; 18. Dustproof net; 19. Drain outlet; 20. Control valve. Detailed Implementation

[0015] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementation methods without changing the essential spirit of this utility model. Therefore, the following specific embodiments and accompanying drawings are merely exemplary descriptions of the technical solution of this utility model, and should not be regarded as the entirety of this utility model or as a limitation or restriction on the technical solution of this utility model.

[0016] Reference Figures 1-4 As shown, this utility model provides a technical solution: a high-pressure heater outlet water temperature regulating mechanism for a thermal power plant, including a high-pressure heater body 1, an inlet 2 at the top of the high-pressure heater body 1, an outlet 3 at the bottom of the high-pressure heater body 1, H-shaped legs 4 fixedly connected to both sides of the bottom of the high-pressure heater body 1, a shaped box 5 mounted on the top of the H-shaped legs 4, a stirring blade 6 disposed inside the shaped box 5, a stirring rod 7 fixedly connected inside the stirring blade 6, a first pulley 8 fixedly connected to the outside of the stirring rod 7, a second pulley 9 disposed on the front of the first pulley 8, and the second pulley 9 being connected to the first pulley 8 by a belt drive. A cooling fan 10 is fixedly connected to the inside of the container, and a semiconductor heat sink 11 is connected to the front of the top of the irregularly shaped box 5. Through the arrangement of parts such as stirring blade 6, stirring rod 7, cooling fan 10, and semiconductor heat sink 11, the cooling fan 10 of the high-pressure heater body 1 can be activated when the water temperature is adjusted. The output end of the cooling fan 10 rotates to dissipate heat from the hot end of the semiconductor heat sink 11 installed on the top of the irregularly shaped box 5. The rotation of the cooling fan 10 drives the first pulley 8 and the second pulley 9 to rotate. The rotation of the first pulley 8 drives the stirring rod 7 to rotate. The rotation of the stirring rod 7 drives the stirring blade 6 to stir and dissipate heat from the water inside the irregularly shaped box 5.

[0017] Reference Figure 4As shown in this embodiment: a sealing ring 12 is fitted onto the surface of the stirring rod 7, and the inner side of the sealing ring 12 is fixedly connected to the outer side of the irregular box 5. By setting the sealing ring 12, the gap between the stirring rod 7 and the irregular box 5 can be sealed to prevent water from flowing out of the irregular box 5.

[0018] Reference Figure 2 As shown in this embodiment: an observation window 13 is provided on the top of the front of the irregular-shaped box 5, and a circular connection port 14 is provided on the top of the irregular-shaped box 5. The observation window 13 allows the user to easily observe the operation of the stirring blade 6 from outside the irregular-shaped box 5. The circular connection port 14 facilitates connection with the water outlet 3.

[0019] Reference Figure 1 As shown in this embodiment: both sides of the top front end of the irregular box 5 are provided with horizontal slots 15, the cooling fan 10 is located inside the horizontal slot 15, and the cooling fan 10 is installed by bolts 16. The horizontal slot 15 can accommodate the cooling fan 10, and the bolts 16 can position the cooling fan 10.

[0020] Reference Figure 3 As shown in this embodiment: air outlets 17 are provided on the top of both sides of the high-pressure heater body 1. A dustproof net 18 is fixedly connected inside the air outlet 17. Through the setting of the air outlet 17 and the dustproof net 18, the airflow inside the water tank can be discharged, while preventing dust from entering the irregular-shaped box 5.

[0021] Reference Figure 1 As shown in this embodiment: a drain outlet 19 is provided at the bottom of the front of the irregular box 5, and a control valve 20 is installed on the top of the drain outlet 19. The drain outlet 19 facilitates the discharge of cooled water, and the control valve 20 controls the drain outlet 19.

[0022] Working principle: When the cooling fan 10 is started, it drives the first pulley 8 to rotate through the output shaft. The second pulley 9 rotates synchronously through the transmission belt. The second pulley 9 drives the stirring rod 7 to rotate, which in turn drives the stirring blades 6 inside the irregularly shaped box 5 to uniformly stir the water and promote heat exchange. At the same time, the cooling fan 10 provides forced air cooling to the hot end of the semiconductor heat sink 11 installed on the top of the irregularly shaped box 5, forming a dual cooling effect. After the water temperature reaches the set range after stirring and cooling, the water source with a suitable temperature is delivered to the subsequent pipeline through the drain outlet 19 and the control valve 20, realizing intelligent water temperature control. This design innovatively combines mechanical stirring with semiconductor heat dissipation, and realizes multiple heat dissipation functions of a single power source through the transmission mechanism. It effectively solves the problem of excessive temperature difference at the inlet 2 of the traditional high-pressure heater, and significantly improves the safety and economy of operation.

[0023] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A high-pressure heater outlet water temperature regulating mechanism for a thermal power plant, comprising a high-pressure heater body (1), wherein a water inlet (2) is provided at the top of the high-pressure heater body (1), a water outlet (3) is provided at the bottom of the high-pressure heater body (1), and H-shaped legs (4) are fixedly connected to both sides of the bottom of the high-pressure heater body (1), characterized in that: The top of the H-shaped leg (4) is fitted with a shaped box (5). Inside the shaped box (5) is a stirring blade (6). Inside the stirring blade (6) is a stirring rod (7). Outside the stirring rod (7) is a first pulley (8). On the front of the first pulley (8) is a second pulley (9). The second pulley (9) and the first pulley (8) are connected by a belt drive. Inside the second pulley (9) is a cooling fan (10). On the front of the top of the shaped box (5) is a semiconductor heat sink (11).

2. The outlet water temperature regulating mechanism for a high-pressure heater in a thermal power plant according to claim 1, characterized in that: The surface of the stirring rod (7) is fitted with a sealing ring (12), and the inner side of the sealing ring (12) is fixedly connected to the outer side of the irregular box (5).

3. The outlet water temperature regulating mechanism for a high-pressure heater in a thermal power plant according to claim 1, characterized in that: The irregular box (5) has an observation window (13) on the top of its front side and a circular connection port (14) on its top.

4. The outlet water temperature regulating mechanism for a high-pressure heater in a thermal power plant according to claim 1, characterized in that: The irregular box (5) has horizontal slots (15) on both sides of the top front end. The cooling fan (10) is located inside the horizontal slot (15) and is installed by bolts (16).

5. The outlet water temperature regulating mechanism for a high-pressure heater in a thermal power plant according to claim 1, characterized in that: The top of both sides of the high-pressure heater body (1) is provided with an air outlet (17), and a dustproof net (18) is fixedly connected inside the air outlet (17).

6. The outlet water temperature regulating mechanism for a high-pressure heater in a thermal power plant according to claim 1, characterized in that: The bottom of the front of the irregular box (5) is provided with a drain outlet (19), and a control valve (20) is installed on the top of the drain outlet (19).

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