Heat exchange assembly of steam seal cooler of steam turbine

Abstract

The utility model discloses a heat exchange assembly of a steam seal cooler of a steam turbine in the technical field of heat exchange assemblies, which comprises a shell, one end of the shell is in bolted connection with an end head, and a partition plate is welded in the end head. The multiple heat exchange pipes in the shell are obliquely arranged, the water guide plate is connected to the bottom ends of the heat exchange pipes, the fin plates on the two sides of the heat exchange pipes increase the contact area, water vapor heat exchange condensation is carried out, water drops attached to the condensation pipes on the heat exchange pipes are integrally obliquely arranged, the water drops are obliquely gathered on the fin plates, and the condensation effect is good. Water is guided on the two fin plates through the rear water guide plate, flow is guided through the lower end of the front water guide plate, water drops are guided in a rapid inclined mode through cooperation with the water guide plate, the water drops are prevented from being attached to the multiple heat exchange pipes, water vapor makes full contact with the multiple heat exchange pipes for heat exchange and condensation, and the heat exchange efficiency is improved; water flow is quickly guided out through the water outlet pipe at the bottom, water guiding is quick, and heat exchange efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange components, in particular to a heat exchange component of a steam turbine seal cooler. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle and becomes an accelerated airflow, which is then sprayed onto the blades, causing the rotor with the blades to rotate and perform work externally. The steam seal cooler of the steam turbine is installed between the moving and static parts of the steam turbine to reduce or prevent steam leakage and air leakage from the vacuum side. In order to reduce the air leakage in the above-mentioned gaps and ensure the normal and safe operation of the steam turbine, various steam seals are specially set up. The steam seal cooler makes the leakage pipes of the front and rear steam seals of the steam turbine slightly negative, so that the leakage continuously enters the steam seal cooler through the leakage pipe and condenses it into water for reuse by the boiler.

[0003] However, the existing steam turbine steam seal cooler heat exchange component basically adopts multiple horizontal heat exchange tubes to exchange heat with hot steam. Since the steam seal steam forms a large amount of condensed water after cooling, the ordinary horizontal heat exchange tubes are not conducive to the rapid bottom concentration of the condensed water. More condensed water adheres to the heat exchange tubes, which is not conducive to the rapid heat exchange and condensation of water vapor, resulting in reduced heat exchange efficiency and difficulty in rapid discharge of condensed water. Based on this, the utility model designs a steam turbine steam seal cooler heat exchange component to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a heat exchange component for a steam turbine seal cooler to solve the above-mentioned problem that a large amount of condensed water is formed after the seal steam is cooled, and ordinary horizontal heat exchange tubes are not conducive to the rapid bottom concentration of the condensed water, and more condensed water adheres to the heat exchange tubes, which is not conducive to the rapid heat exchange and condensation of water vapor.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A steam turbine steam seal cooler heat exchange assembly comprises a shell, one end of the shell is bolted to an end head, a partition plate is welded in the end head, one end of the end head is bolted to a cover plate, a cooling water outlet pipe and a cooling water inlet pipe are connected to the cover plate, one side of the shell is connected to an air inlet pipe, the other end of the shell is connected to an exhaust pipe, the bottom of the shell is connected to a water collecting tank, the bottom end of the water collecting tank is connected to the water outlet pipe, support plates are connected to both sides of the shell, multiple groups of heat exchange tubes are installed on the end head, the water inlet and outlet ends of the heat exchange tubes are connected to an isolation cavity in the end head, the heat exchange tube is U-shaped and inclined, the bottom end of the heat exchange tube is connected to a water guide plate, the two sides of the heat exchange tube are connected to fin plates, the rear ends of the two fin plates are connected to rear water guide plates, and the bottom end of the bottom fin plate is connected to a front water guide plate.

[0007] As a further solution of the utility model: the water collecting tank is arranged in the middle of the bottom of the shell, and the bottom end surface of the water collecting tank is inclined.

[0008] As a further solution of the utility model: a perspective window is connected to one side of the water collecting tank, and the height of the perspective window matches the height of the water collecting tank.

[0009] As a further solution of the utility model: water guide grooves are provided on both sides of the water guide plate, and the front ends of the water guide grooves are arc-shaped.

[0010] As a further solution of the utility model: the front end of the heat exchange tube is connected with a fixing rod, and a plurality of reinforcing rods are welded between the heat exchange tubes.

[0011] As a further solution of the utility model: a plurality of reinforcing rods are arranged at equal distances between the heat exchange tubes, and the plurality of reinforcing rods are all arranged inclined.

[0012] As a further solution of the utility model: a positioning plate is fixedly welded inside the shell, and multiple groups of heat exchange tubes pass through the positioning plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. In the utility model, multiple heat exchange tubes inside the shell are tilted and arranged, and a water guide plate is connected to the bottom end of the heat exchange tube. The fin plates on both sides of the heat exchange tube increase the contact area to carry out water vapor heat exchange and condensation. The water droplets attached to the condensation tube are on the heat exchange tube. The heat exchange tube is tilted as a whole to allow the water droplets to be tilted and gathered on the fin plates, and water is guided on the two sections of the fin plates through the rear water guide plate, and the water is guided through the lower end of the front water guide plate, and the water droplets are quickly tilted and guided in coordination with the water guide plate to avoid water droplets from adhering to multiple heat exchange tubes, so that water vapor and multiple heat exchange tubes are fully contacted for heat exchange and condensation, thereby improving the heat exchange efficiency. The water droplets gathered at the bottom are gathered through the bottom water collecting tank, and the water flow is quickly discharged through the bottom water outlet pipe, with fast water guiding and high heat exchange efficiency.

[0015] 2. In the utility model, water guide grooves are opened on both sides of the water guide plate, and the front end of the water guide grooves is arc-shaped. The water guide grooves on both sides of the water guide plate assist in water guiding. The arc-shaped ends of the water guide grooves allow the bottom of the water flow to guide vertically, allowing the water flow to guide quickly. A fixed rod is connected to the front end of the heat exchange tube, and multiple reinforcing rods are welded between the heat exchange tubes. The fixed rod connected to the front end of the heat exchange tube supports the front end, and multiple reinforcing rods are welded between the heat exchange tubes for reinforced support. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2It is a schematic diagram of the overall explosion structure of the utility model;

[0018] Figure 3 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0019] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the utility model.

[0020] In the figure: 1. Shell; 2. End; 3. Partition plate; 4. Cover plate; 5. Cooling water outlet pipe; 6. Cooling water inlet pipe; 7. Support plate; 8. Inlet pipe; 9. Exhaust pipe; 10. Water collecting box; 11. Water outlet pipe; 12. Perspective window; 13. Heat exchange tube; 14. Water guide plate; 15. Water guide groove; 16. Fin plate; 17. Rear water guide plate; 18. Front water guide plate; 19. Fixing rod; 20. Reinforcing rod; 21. Positioning plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example:

[0023] See also Figure 1-Figure 4In the embodiment of the utility model, a heat exchange component of a steam turbine seal cooler includes a shell 1, one end of the shell 1 is bolted to an end head 2, a partition plate 3 is welded inside the end head 2, one end of the end head 2 is bolted to a cover plate 4, a cooling water outlet pipe 5 and a cooling water inlet pipe 6 are connected to the cover plate 4, one side of the shell 1 is connected to an air inlet pipe 8, the other end of the shell 1 is connected to an exhaust pipe 9, the bottom of the shell 1 is connected to a water collecting tank 10, the bottom end of the water collecting tank 10 is connected to a water outlet pipe 11, the two sides of the shell 1 are connected to support plates 7, and the end head 2 is penetrated and installed There are multiple groups of heat exchange tubes 13, the water inlet and outlet ends of the heat exchange tubes 13 are connected to the isolation cavity in the end head 2, the heat exchange tubes 13 are U-shaped and inclined, the bottom end of the heat exchange tubes 13 is connected to a water guide plate 14, the two sides of the heat exchange tubes 13 are connected to fin plates 16, the rear ends of the two fin plates 16 are connected to rear water guide plates 17, the bottom end of the bottom fin plate 16 is connected to a front water guide plate 18, the shell 1 is supported as a whole by a support plate 7, one end of the shell 1 is connected to the end head 2, the internal space of the end head 2 is isolated by a partition plate 3, one end of the end head 2 is connected to a cover plate 4, the cover plate 4 The cooling outlet pipe 5 and the cooling inlet pipe 6 are connected to the upper portion, the cooling outlet pipe 5 and the cooling inlet pipe 6 introduce cooling water, the cooling water is introduced into the multiple heat exchange tubes 13 through the cavity in the end head 2, the air inlet pipe 8 on one side of the shell 1 introduces water vapor, the water vapor exchanges heat with the multiple heat exchange tubes 13, and the uncondensed water vapor is discharged through the exhaust pipe 9 on one side. The multiple heat exchange tubes 13 inside the shell 1 are inclinedly arranged, and the water guide plate 14 is connected to the bottom end of the heat exchange tube 13. The fin plates 16 on both sides of the heat exchange tube 13 increase the contact area, and the water vapor heat exchange condensation is carried out. The water droplets attached to the condenser tubes are tilted as a whole on the heat exchange tubes 13, allowing the water droplets to be tilted and gathered on the fins 16, and water is guided on the two sections of the fins 16 through the rear water guide plate 17, and the water is guided through the lower end of the front water guide plate 18, and the water guide plate 14 is used to quickly guide the water droplets at an angle to prevent the water droplets from adhering to multiple heat exchange tubes 13, so that the water vapor can fully contact the multiple heat exchange tubes 13 for heat exchange and condensation, thereby improving the heat exchange efficiency. The water droplets gathered at the bottom are gathered through the bottom water collecting tank 10, and the water flow is quickly discharged through the bottom water outlet pipe 11, with fast water guidance and high heat exchange efficiency.

[0024] Preferably, Figure 4 As shown, the water collecting tank 10 is arranged in the middle of the bottom of the shell 1, and the bottom end surface of the water collecting tank 10 is inclined. The water collecting tank 10 in the middle of the bottom of the shell 1 collects the water flow in the middle. The inclined bottom end surface of the water collecting tank 10 allows the water flow to be concentrated at the bottom, which is convenient for the water flow to be discharged.

[0025] Preferably, Figure 1 As shown, a perspective window 12 is connected to one side of the water collecting tank 10, and the height of the perspective window 12 matches the height of the water collecting tank 10. The perspective window 12 connected to one side of the water collecting tank 10 is used to observe the water level to avoid internal water accumulation.

[0026] Preferably, Figure 2 and Figure 3 As shown, water guide grooves 15 are opened on both sides of the water guide plate 14, and the front end of the water guide grooves 15 is arc-shaped. The water guide grooves 15 on both sides of the water guide plate 14 assist in water guidance. The arc-shaped ends of the water guide grooves 15 allow the bottom of the water flow to be guided vertically, allowing the water flow to be guided quickly.

[0027] Preferably, Figure 2 As shown, the front end of the heat exchange tube 13 is connected to a fixing rod 19, and a plurality of reinforcing rods 20 are welded between the heat exchange tubes 13. The fixing rod 19 connected to the front end of the heat exchange tube 13 provides front end support, and a plurality of reinforcing rods 20 are welded between the heat exchange tubes 13 for reinforced support.

[0028] Preferably, Figure 2 As shown, multiple reinforcing rods 20 are equidistantly arranged between the heat exchange tubes 13, and the multiple reinforcing rods 20 are all inclinedly arranged. The multiple equidistant reinforcing rods 20 between the heat exchange tubes 13 provide equidistant support, and the multiple inclined reinforcing rods 20 can assist in inclined diversion of water droplets.

[0029] Preferably, Figure 2 and Figure 4 As shown, a positioning plate 21 is fixedly welded inside the shell 1, and multiple groups of heat exchange tubes 13 pass through the positioning plate 21. The positioning plate 21 inside the shell 1 fixes and installs the multiple groups of heat exchange tubes 13, so that the multiple heat exchange tubes 13 are stably supported.

[0030] The working principle of the utility model is as follows: the shell 1 is supported as a whole by the support plate 7, one end of the shell 1 is connected to the end head 2, the internal space of the end head 2 is isolated by the partition plate 3, one end of the end head 2 is connected to the cover plate 4, the cover plate 4 is connected with the cooling water outlet pipe 5 and the cooling water inlet pipe 6, the cooling water outlet pipe 5 and the cooling water inlet pipe 6 introduce cooling water, the cooling water is introduced into a plurality of heat exchange tubes 13 through the cavity in the end head 2, the air inlet pipe 8 on one side of the shell 1 introduces water vapor, the water vapor exchanges heat with the plurality of heat exchange tubes 13, the uncondensed water vapor is discharged through the exhaust pipe 9 on one side, the plurality of heat exchange tubes 13 inside the shell 1 are arranged obliquely, and the water guide plate 14 is connected to the bottom end of the heat exchange tube 13 The fins 16 on both sides of the heat exchange tube 13 increase the contact area to carry out heat exchange and condensation of water vapor. The water droplets attached to the condensation tube on the heat exchange tube 13 are tilted. The heat exchange tube 13 is tilted as a whole to allow the water droplets to tilt and converge on the fins 16, and the water is guided on the two sections of the fins 16 through the rear water guide plate 17, and the water is guided through the lower end of the front water guide plate 18, and the water guide plate 14 is used to quickly guide the water droplets to avoid water droplets from adhering to multiple heat exchange tubes 13, so that the water vapor can fully contact with multiple heat exchange tubes 13 for heat exchange and condensation, thereby improving the heat exchange efficiency. The water droplets gathered at the bottom are gathered through the bottom water collecting box 10, and the water flow is quickly discharged through the bottom water outlet pipe 11, with fast water guidance and high heat exchange efficiency.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A steam turbine seal cooler heat exchange assembly, comprising a housing (1), characterized in that: One end of the shell (1) is bolted to an end head (2), a partition plate (3) is welded inside the end head (2), one end of the end head (2) is bolted to a cover plate (4), a cooling water outlet pipe (5) and a cooling water inlet pipe (6) are connected to the cover plate (4), one side of the shell (1) is connected to an air inlet pipe (8), the other end of the shell (1) is connected to an exhaust pipe (9), the bottom of the shell (1) is connected to a water collecting tank (10), the bottom end of the water collecting tank (10) is connected to a water outlet pipe (11), the shell ( 1) Support plates (7) are connected on both sides, a plurality of groups of heat exchange tubes (13) are installed through the end head (2), the water inlet and outlet ends of the heat exchange tubes (13) are connected to the isolation cavity in the end head (2), the heat exchange tubes (13) are U-shaped and inclined, the bottom end of the heat exchange tubes (13) is connected to a water guide plate (14), the two sides of the heat exchange tubes (13) are connected to fin plates (16), the rear ends of the two fin plates (16) are connected to rear water guide plates (17), and the bottom end of the bottom fin plate (16) is connected to a front water guide plate (18).

2. A steam turbine seal cooler heat exchange assembly according to claim 1, characterized in that: The water collecting tank (10) is arranged at the middle of the bottom of the shell (1), and the bottom end surface of the water collecting tank (10) is arranged to be inclined.

3. A steam turbine seal cooler heat exchange assembly according to claim 2, characterized in that: A perspective window (12) is connected to one side of the water collecting tank (10), and the height of the perspective window (12) matches the height of the water collecting tank (10).

4. A steam turbine seal cooler heat exchange assembly according to claim 1, characterized in that: Water guide grooves (15) are provided on both sides of the water guide plate (14), and the front ends of the water guide grooves (15) are arc-shaped.

5. The steam turbine seal cooler heat exchange assembly according to claim 1, characterized in that: A fixing rod (19) is connected to the front end of the heat exchange tube (13), and a plurality of reinforcing rods (20) are welded between the heat exchange tubes (13).

6. A steam turbine seal cooler heat exchange assembly according to claim 5, characterized in that: A plurality of reinforcing rods (20) are arranged at equal distances between the heat exchange tubes (13), and the plurality of reinforcing rods (20) are all arranged at an inclination.

7. The steam turbine seal cooler heat exchange assembly according to claim 1, characterized in that: A positioning plate (21) is fixedly welded inside the shell (1), and a plurality of groups of heat exchange tubes (13) penetrate through the positioning plate (21).

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