A heat exchange component for a steam turbine steam seal cooler
By using spiral guide vanes and finned structures, the contact time and area between steam and heat exchange tubes are enhanced, solving the problem of short lateral contact time of steam, improving heat exchange efficiency and extending equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUXI JUNTELAI EQUIP MFG CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-03
AI Technical Summary
In existing technologies, the lateral contact time between steam entering the shell and the heat exchange tubes is short, resulting in low heat exchange efficiency.
The design employs a spiral guide vane and fin structure. Steam flows through the gaps between the spiral guide vanes. A fixed frame is fixedly connected to the inner side of the spiral guide vane, and heat exchange tubes are installed inside the fixed frame. Fins are set on the outer side of the heat exchange tubes to increase the heat exchange area. At the same time, condensate slides down through the spiral heat exchange tubes and is collected and discharged through the flow guide support plate and the water permeable mesh plate.
It increases the contact time and heat exchange area between steam and heat exchange tubes, enhances heat exchange efficiency, and keeps the equipment clean and extends its service life through effective condensate collection and discharge.
Smart Images
Figure CN224452863U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to heat exchange and cooling of gas seal coolers, specifically a heat exchange component for a steam turbine gas seal cooler, belonging to the technical field of heat exchange component technology. Background Technology
[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then sprayed onto the blades, causing the rotor equipped with a row of blades to rotate and perform work. The steam seal cooler of the steam turbine is installed between the moving and stationary parts of the turbine to reduce or prevent steam leakage and air leakage from the vacuum side. The steam seal cooler creates a slight negative pressure in the leakage pipes of the steam seals before and after the steam turbine, allowing the leaking gas to continuously enter the steam seal cooler through the leakage pipes and condense into water for reuse by the boiler.
[0003] Existing patent number CN 222121607 U relates to a heat exchange component of a steam turbine steam seal cooler. It uses multiple heat exchange tubes inside the shell that are inclined and connected to water guide plates at the bottom of the heat exchange tubes. Water droplets attached to the condenser tubes on the heat exchange tubes are tilted as a whole, so that the water droplets can be tilted and collected on the fins. The water is guided by the rear water guide plate on the two sections of the fins and the lower end of the front water guide plate to prevent water droplets from adhering to the multiple heat exchange tubes. This allows water vapor to fully contact the multiple heat exchange tubes for heat exchange and condensation, thereby improving the heat exchange efficiency.
[0004] In the aforementioned patent, the heat exchange tubes are arranged in parallel. Steam enters through the inlet pipe located on the side of the heat exchange tubes and exits through the exhaust pipe. The steam enters the shell and contacts the heat exchange tubes laterally. The contact time with the heat exchange tubes is short, which reduces the heat exchange efficiency. Utility Model Content
[0005] (a) Technical problems to be solved
[0006] The purpose of this invention is to provide a heat exchange component for a steam turbine steam seal cooler to solve the above-mentioned problems, thereby addressing the issue of low heat exchange efficiency caused by steam entering the shell and contacting the heat exchange tubes laterally, resulting in a short contact time with the heat exchange tubes.
[0007] (II) Technical Solution
[0008] This utility model is achieved through the following technical solution: a heat exchange component for a steam turbine steam seal cooler.
[0009] The device includes a shell, a heat exchange assembly fixedly installed inside the shell, and a drainage assembly fixedly installed at the bottom of the shell. The shell includes an outer shell and an inner cylinder. A bracket is fixedly installed on the outside of the outer shell, and the inner cylinder is fixedly installed on the inside of the outer shell. A cover plate is fixedly installed on the front of the outer shell, and an air inlet pipe and an air outlet pipe are fixedly connected to the left and right sides of the outer shell, respectively. The heat exchange assembly includes a spiral guide plate fixedly snapped between the outer shell and the inner cylinder. A fixing frame is fixedly connected to the inside of the spiral guide plate, and a heat exchange tube is fixedly installed inside the fixing frame. An inlet end and an outlet end are respectively provided on the left and right sides of the heat exchange tube, and fins are fixedly installed on the outside of the heat exchange tube.
[0010] Preferably, the air inlet pipe and the air outlet pipe are respectively connected between the gaps of the spiral guide plate, and the air inlet pipe and the air outlet pipe are arranged opposite to each other.
[0011] Preferably, the bottom of the fixing frame is fixedly connected to a flow guide support plate that fits into the bottom of the outer shell.
[0012] Preferably, the outer sides of the cover plate and the outer shell are respectively provided with cooling water pipes connected to the inlet end and the outlet end.
[0013] Preferably, the drainage assembly includes a permeable mesh plate, a flow guide hood, and a drain pipe. The bottom of the outer shell has a confluence port. The permeable mesh plate is fixedly installed inside the confluence port. The flow guide hood is fixedly connected to the bottom of the outer shell and covers the outside of the permeable mesh plate. The drain pipe is fixedly connected to the bottom of the flow guide hood.
[0014] Preferably, the flow guide support plate is positioned directly above the permeable mesh plate, and the cross-section of the flow guide support plate is in the shape of an inverted trapezoid.
[0015] Preferably, the bottom of the flow guide is sloped towards the drain pipe.
[0016] This utility model provides a heat exchange component for a steam turbine steam seal cooler, which has the following beneficial effects:
[0017] 1. In this steam turbine steam seal cooler heat exchange assembly, after the steam flow enters the outer shell, it flows along the gaps between the spiral guide plates and passes through the heat exchange tubes spirally arranged between the spiral guide plates. This guides the airflow so that it can pass through the heat exchange tubes evenly and fully and contact the heat exchange tubes for heat exchange. The fins are used to increase the heat exchange area. At the same time, the generated condensate can slide down with the spirally arranged heat exchange tubes and be treated, which can effectively improve the heat exchange efficiency.
[0018] 2. In this steam turbine steam seal cooler heat exchange component, through the setting of the guide support plate, the condensate at the bottom of the heat exchange tube contacts the guide support plate, flows along the guide support plate to the permeable mesh plate, passes through and enters the guide shroud, and can be discharged through the drain pipe, which helps to collect and discharge condensate, keep the heat exchange component clean, and extend the service life of the equipment. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the shell of this utility model;
[0021] Figure 3 This is a schematic diagram of the heat exchange component of this utility model;
[0022] Figure 4 This is a cross-sectional structural diagram of the shell of this utility model;
[0023] Figure 5 This is a schematic diagram of the drainage component of this utility model.
[0024] [Explanation of Key Component Symbols]
[0025] 1. Shell; 11. Outer shell; 12. Inner cylinder; 13. Cover plate; 14. Cooling water pipe; 15. Air inlet pipe; 16. Air outlet pipe; 17. Manifold; 18. Support; 2. Heat exchange assembly; 21. Spiral guide vane; 22. Fixing frame; 23. Heat exchange tube; 24. Inlet end; 25. Outlet end; 26. Fin; 27. Flow guide support plate; 3. Drainage assembly; 31. Water permeable mesh plate; 32. Flow guide hood; 33. Drainage pipe. Detailed Implementation
[0026] This utility model provides a heat exchange component for a steam turbine steam seal cooler.
[0027] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The housing 1 includes an outer shell 11 and an inner cylinder 12. A bracket 18 is fixedly installed on the outside of the outer shell 11. The inner cylinder 12 is fixedly installed on the inside of the outer shell 11. A cover plate 13 is fixedly installed on the front side of the outer shell 11. An air inlet pipe 15 and an air outlet pipe 16 are fixedly connected to the left and right sides of the outer shell 11, respectively. The heat exchange assembly 2 includes a spiral guide plate 21 fixedly snapped between the outer shell 11 and the inner cylinder 12. A fixing frame 22 is fixedly connected to the inside of the spiral guide plate 21. A heat exchange tube 23 is fixedly installed inside the fixing frame 22. An inlet end 24 and an outlet end 25 are respectively provided on the left and right sides of the heat exchange tube 23. Fins 26 are fixedly installed on the outside of the heat exchange tube 23.
[0028] The air inlet pipe 15 and the air outlet pipe 16 are respectively connected between the gaps of the spiral guide plate 21, and the air inlet pipe 15 and the air outlet pipe 16 are arranged opposite to each other.
[0029] Cooling water pipes 14, which are connected to the inlet end 24 and the outlet end 25, are respectively provided on the outer side of the cover plate 13 and the outer shell 11.
[0030] In use, one end of the cooling water pipe 14 is connected to the inlet end 24 to introduce cooling water into the heat exchange tube 23, and the other end is connected to the outlet end 25 to discharge the cooling water after heat exchange. This allows the cooling water to circulate within the heat exchange tube 23. Through the heat exchange between the fins 26 and the spiral guide plate 21, the ingenious combination of the spiral guide plate 21 and the fins 26 greatly increases the heat exchange area and improves the heat exchange efficiency, effectively carrying away heat to achieve the purpose of cooling. By precisely controlling the flow rate and temperature of the cooling water, the cooling effect can be further adjusted to meet the cooling needs under different working conditions.
[0031] Steam enters the housing 11 through the inlet pipe 15. The design of the inlet pipe 15 allows the cooling gas to enter the gaps between the spiral guide fins 21 evenly. The outlet pipe 16 is responsible for discharging the heat-exchanged gas. After entering the housing 11, the steam flow flows along the gaps between the spiral guide fins 21. The design of the spiral guide fins 21 not only optimizes the gas flow path but also enhances the heat exchange effect between the cooling gas and the heat exchange tubes 23. The heat exchange tubes 23 are spirally arranged between the spiral guide fins 21. By guiding the airflow, the airflow can pass through the heat exchange tubes 23 evenly and contact them for heat exchange. The fins 26 are used to increase the heat exchange area. At the same time, the condensate generated can slide down with the spirally arranged heat exchange tubes 23, which can effectively improve the heat exchange efficiency.
[0032] Please refer to it again. Figure 4 and Figure 5 The bottom of the mounting bracket 22 is fixedly connected to a flow guide support plate 27 that fits into the bottom of the outer shell 11.
[0033] The drainage assembly 3 includes a permeable mesh plate 31, a flow guide hood 32, and a drain pipe 33. The bottom of the outer shell 11 is provided with a confluence port 17. The permeable mesh plate 31 is fixedly installed on the inner side of the confluence port 17. The flow guide hood 32 is fixedly connected to the bottom of the outer shell 11 and covers the outside of the permeable mesh plate 31. The drain pipe 33 is fixedly connected to the bottom of the flow guide hood 32.
[0034] The bottom of the flow guide shroud 32 is set with an inclined surface facing the drain pipe 33.
[0035] In use, this invention allows condensate generated externally to slide downwards along the outer wall of the heat exchange tubes 23 via a spiral arrangement. The guide support plate 27, with its surface featuring guide grooves or ribs, directs the condensate from the bottom of the heat exchange tubes 23 onto the guide support plate 27, allowing it to flow down onto the permeable mesh plate 31, pass through, and enter the guide shroud 32. The condensate is then discharged through the drain pipe 33, facilitating condensate collection and drainage, maintaining the cleanliness of the heat exchange assembly 2, and extending the equipment's service life.
[0036] The sloping design at the bottom of the guide shroud 32 facilitates the smooth flow of condensate along the inner wall of the guide shroud 32 to the drain pipe 33, preventing condensate from accumulating at the bottom of the guide shroud 32 and ensuring timely discharge of condensate. This further improves the drainage efficiency and heat exchange performance of the heat exchange components. At the same time, the permeable mesh plate 31 not only allows condensate to pass through but also effectively prevents impurities from entering the guide shroud 32 and drain pipe 33, avoiding blockage of the drainage system and enhancing the stability and reliability of the equipment. The permeable mesh plate 31 is made of corrosion-resistant material, which can maintain its good permeability and structural strength for a long time, adapting to various working environments. The tight connection between the various components ensures that condensate will not leak during collection and discharge, guaranteeing sealing performance.
[0037] Please refer to it again. Figure 4 and Figure 5 The flow guide support plate 27 is located directly above the permeable mesh plate 31, and the cross-section of the flow guide support plate 27 is set in an inverted trapezoidal shape.
[0038] In use, the inverted trapezoidal design of this invention results in the upper surface area of the flow guide support plate 27 being larger than the lower surface area. This design facilitates the distribution of condensate on the flow guide support plate 27 and quickly guides it to the permeable mesh plate 31 at its lower end. At the same time, the trapezoidal structure also enhances the structural strength of the flow guide support plate 27, ensuring stable operation of the equipment. The inverted trapezoidal shape also facilitates the formation of a certain flow velocity of condensate on the flow guide support plate 27, promoting faster flow of condensate into the permeable mesh plate 31 and then into the flow guide hood 32, thus improving the condensate collection efficiency. The surface of the flow guide support plate 27 undergoes special treatment and has good hydrophobic properties, which can effectively reduce the residence time of condensate on the surface and further promote the rapid discharge of condensate.
[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A heat exchange assembly for a steam turbine steam seal cooler, characterized in that: The system includes a housing (1), a heat exchange assembly (2) fixedly installed inside the housing (1), and a drainage assembly (3) fixedly installed at the bottom of the housing (1). The housing (1) includes an outer shell (11) and an inner cylinder (12). A bracket (18) is fixedly installed on the outside of the outer shell (11). The inner cylinder (12) is fixedly installed on the inside of the outer shell (11). A cover plate (13) is fixedly installed on the front side of the outer shell (11). Air inlets are fixedly connected to the left and right sides of the outer shell (11). The heat exchange assembly (2) includes a spiral guide plate (21) fixedly connected between the outer shell (11) and the inner cylinder (12). A fixing frame (22) is fixedly connected to the inner side of the spiral guide plate (21). A heat exchange tube (23) is fixedly installed inside the fixing frame (22). An inlet end (24) and an outlet end (25) are respectively provided on the left and right sides of the heat exchange tube (23). A fin (26) is fixedly installed on the outer side of the heat exchange tube (23).
2. The heat exchange assembly of a steam turbine steam seal cooler according to claim 1, characterized in that: The air inlet pipe (15) and the air outlet pipe (16) are respectively connected between the gaps of the spiral guide plate (21), and the air inlet pipe (15) and the air outlet pipe (16) are arranged opposite to each other.
3. The heat exchange assembly of a steam turbine steam seal cooler according to claim 1, characterized in that: The bottom of the fixed frame (22) is fixedly connected to a flow guide support plate (27) that fits into the bottom of the outer shell (11).
4. The heat exchange assembly of a steam turbine steam seal cooler according to claim 1, characterized in that: Cooling water pipes (14) connected to the inlet end (24) and the outlet end (25) are respectively provided on the outer side of the cover plate (13) and the outer shell (11).
5. A heat exchange assembly for a steam turbine steam seal cooler according to claim 3, characterized in that: The drainage assembly (3) includes a permeable mesh plate (31), a flow guide (32) and a drain pipe (33). The bottom of the outer shell (11) is provided with a confluence port (17). The permeable mesh plate (31) is fixedly installed on the inner side of the confluence port (17). The flow guide (32) is fixedly connected to the bottom of the outer shell (11) and covers the outside of the permeable mesh plate (31). The drain pipe (33) is fixedly connected to the bottom of the flow guide (32).
6. A heat exchange assembly for a steam turbine steam seal cooler according to claim 5, characterized in that: The flow guide support plate (27) is located directly above the permeable mesh plate (31), and the cross section of the flow guide support plate (27) is in the shape of an inverted trapezoid.
7. A heat exchange assembly for a steam turbine steam seal cooler according to claim 5, characterized in that: The bottom of the flow guide (32) is sloping towards the drain pipe (33).