A device for improving the efficiency of cooling water for steam turbines

Abstract

The utility model provides a device that improves steam turbine cooling water efficiency. The device that improves steam turbine cooling water efficiency includes: installation chassis, heat exchange box, the heat exchange box installs at the top of installation chassis, one side of heat exchange box is installed with water inlet pipe and drain pipe respectively, one end of drain pipe and water inlet pipe all is installed with connecting head, the other end of drain pipe and water inlet pipe is installed with heat exchange pipe, the outer surface of heat exchange pipe is installed with multibank wave heat exchange substrate, the back of heat exchange box is installed with discharge assembly, the back of heat exchange box is installed with water receiving assembly, the back of water receiving assembly is installed with butt joint pipe. The device that improves steam turbine cooling water efficiency provided by the utility model increases the contact area and time of steam and heat exchange pipe through the design of wave heat exchange substrate, improves the heat exchange effect, and the layered wave heat exchange substrate facilitates the liquid drop of condensate.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine technology, and in particular to a device for improving the efficiency of steam turbine cooling water. Background Technology

[0002] Steam turbines are the core power equipment in power plants. They use high-temperature, high-pressure steam generated by boilers as the working fluid. The steam impacts the rotor blades, converting the thermal energy of the steam into the mechanical energy of the rotor, which then drives the generator to rotate and cut magnetic field lines, ultimately realizing the conversion of thermal energy into electrical energy. Their operating efficiency directly affects the power generation benefits of the power plant and they are widely used in various power generation systems such as thermal power and nuclear power.

[0003] Steam turbine cooling water is an auxiliary cooling medium that ensures the safe and stable operation of the unit. It is mainly used to cool key components of the steam turbine such as condenser, bearings, and shaft seals. It can remove excess heat generated during equipment operation, preventing components from deforming, wearing, or failing due to excessive temperature. At the same time, it helps the condenser to form a vacuum environment, improving the working efficiency of the steam turbine. Common sources are circulating water or industrial purified water.

[0004] Traditional steam turbine cooling tube bundles are mostly smooth straight tubes or simple fin designs, with limited heat exchange area. Furthermore, water flow tends to form a laminar boundary layer along the tube wall, resulting in high heat transfer resistance and low cooling water heat absorption efficiency.

[0005] Therefore, it is necessary to provide a device to improve the efficiency of steam turbine cooling water to solve the above-mentioned technical problems. Utility Model Content

[0006] This invention provides a device for improving the efficiency of steam turbine cooling water, solving the problems of simple design, limited heat exchange area, easy formation of laminar boundary layer in water flow, high heat transfer resistance, and low heat absorption efficiency in traditional steam turbine cooling tube bundles.

[0007] To solve the above-mentioned technical problems, the device for improving the cooling water efficiency of steam turbines provided by this utility model includes: a mounting base;

[0008] A heat exchange box is mounted on the top of a mounting frame. An inlet pipe and a drain pipe are respectively installed on one side of the heat exchange box. A connector is installed at one end of the drain pipe and the inlet pipe. A heat exchange tube is installed at the other end of the drain pipe and the inlet pipe. Multiple rows of corrugated heat exchange substrates are installed on the outer surface of the heat exchange tube. A discharge assembly is installed on the back of the heat exchange box. A water receiving assembly is installed on the back of the water receiving assembly. A connecting pipe is installed on the back of the water receiving assembly.

[0009] A steam turbine body is mounted on top of a mounting base, and a return steam pipe is installed at the outlet of the steam turbine body.

[0010] The connectors are connected to the liquid inlet pipe and the liquid outlet pipe respectively. The two ends of the heat exchange tube are connected to the drain pipe and the other end of the water inlet pipe. The heat exchange tube body is made of 25mm×2mm seamless steel pipe, and the pipe is installed in layers on the top, bottom and left and right. Multiple corrugated heat exchange substrates are installed between each layer. The corrugated heat exchange substrate fins are 3mm high, 15mm pitch and 1mm thick.

[0011] Preferably, a control box with a door is installed on the top of the mounting base, and an operation panel is installed on one side of the control box;

[0012] The control panel allows users to set equipment operating parameters. The door is equipped with a lock, and the control box contains power switches and controllers for auxiliary equipment operation.

[0013] Preferably, a bracket is mounted on the top of the mounting base, and a pressure regulating valve with a connecting pipe is mounted on the top of the bracket.

[0014] Preferably, the mounting base includes a base plate, a mounting structure, and an adjustment structure, wherein the mounting structure is used to mount the adjustment structure to the bottom of the base plate;

[0015] The threaded connection of the mounting and adjusting structure allows for adjustment of the stability of the base plate as needed.

[0016] Preferably, the discharge assembly includes a tapered manifold and a discharge pipe, the tapered manifold being used to install the discharge pipe on the back of the heat exchange box;

[0017] A conical manifold combined with an exhaust pipe can increase gas loss.

[0018] Preferably, the water receiving assembly includes a water receiving pipe, a valve, a bend, and a water receiving frame. The water receiving frame is installed on the back of the mounting base. The water receiving pipe is used to install the valve on the back of the heat exchange box. The bend is used to connect the valve and the water receiving frame.

[0019] Preferably, an interception tank is mounted on the top of the heat exchange box via a fixed base, an installation pipe is mounted on the outer surface of the interception tank, and a reflux structure is mounted on the bottom of the outer surface of the interception tank.

[0020] The recirculation structure includes pipes and valves to facilitate the collection of intercepted water into the interior of the water receiving assembly.

[0021] Preferably, a conical separation core is installed inside the interception barrel, and a top cover with an exhaust pipe is installed on the top of the interception barrel;

[0022] The conical separator core has a pore diameter of 3-5mm and a porosity of ≥80%, allowing steam to pass through the honeycomb pores.

[0023] Compared with related technologies, the device for improving the cooling water efficiency of steam turbines provided by this utility model has the following beneficial effects:

[0024] This invention provides a device for improving the cooling water efficiency of a steam turbine. To improve the cooling water efficiency, a heat exchange box is installed on the top of the mounting frame. The return steam pipe from the turbine outlet is then connected to the inlet of the heat exchange box. The heat exchange box contains reciprocating layered heat exchange tubes, and multiple sets of corrugated heat exchange substrates are installed between the layers of heat exchange tubes. This allows steam to move along the corrugated heat exchange substrates after entering the heat exchange box from the return steam pipe, increasing the heat exchange contact area. The contact points between the corrugated heat exchange substrates and the heat exchange tubes are interconnected, facilitating liquid flow and enhancing the heat exchange effect. A water collection component is installed on the back of the heat exchange box to discharge condensed water from inside the box during the heat exchange process. This design, using corrugated heat exchange substrates, increases the contact area and time between steam and heat exchange tubes, improving the heat exchange effect. Furthermore, the layered corrugated heat exchange substrates facilitate the dripping of condensed water. Attached Figure Description

[0025] Figure 1 A schematic diagram of the first embodiment of the device for improving the efficiency of steam turbine cooling water provided by this utility model;

[0026] Figure 2 A schematic diagram of the heat exchange box is provided for this utility model;

[0027] Figure 3 Provided for this utility model Figure 2 An enlarged view of point A shown;

[0028] Figure 4 Provided for this utility model Figure 2 An enlarged view of point B shown;

[0029] Figure 5 A schematic diagram of the structure of the second embodiment of the device for improving the efficiency of steam turbine cooling water provided by this utility model;

[0030] Figure 6 Provided for this utility model Figure 5 A magnified view of point C shown.

[0031] The diagram is labeled as follows: 1. Mounting base frame; 101. Base plate; 102. Mounting structure; 103. Adjustment structure; 2. Steam turbine body; 3. Heat exchanger box; 4. Discharge assembly; 401. Conical manifold; 402. Discharge pipe; 5. Water receiving assembly; 501. Water receiving pipe; 502. Valve; 503. Bend; 504. Water receiving frame; 6. Steam inlet pipe; 7. Pressure stabilizing valve; 8. Connecting pipe; 9. Bracket; 10. Control panel; 11. Control box; 12. Box door; 13. Steam return pipe; 14. Heat exchanger pipe; 15. Connecting pipe; 16. Connector; 17. Water inlet pipe; 18. Drain pipe; 19. Corrugated heat exchanger substrate; 20. Exhaust pipe; 21. Top cover; 22. Mounting pipe; 23. Fixed base; 24. Interception tank; 25. Conical separation core; 26. Return flow structure. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] First Embodiment

[0034] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A schematic diagram of the structure of the first embodiment of the device for improving the cooling water efficiency of a steam turbine provided by this utility model; Figure 2 A schematic diagram of the heat exchange box is provided for this utility model; Figure 3 Provided for this utility model Figure 2 An enlarged view of point A shown; Figure 4 Provided for this utility model Figure 2 The enlarged view at point B is shown. The device for improving the efficiency of the steam turbine cooling water includes: mounting base 1;

[0035] A heat exchange box 3 is installed on the top of the mounting base 1. A water inlet pipe 17 and a water outlet pipe 18 are respectively installed on one side of the heat exchange box 3. A connector 16 is installed at one end of the water inlet pipe 17 and the water outlet pipe 18. A heat exchange tube 14 is installed at the other end of the water inlet pipe 17. Multiple rows of corrugated heat exchange substrates 19 are installed on the outer surface of the heat exchange tube 14. A discharge assembly 4 is installed on the back of the heat exchange box 3. A water receiving assembly 5 is installed on the back of the water receiving assembly 5. A connecting pipe 15 is installed on the back of the water receiving assembly 5.

[0036] Steam turbine body 2, which is mounted on the top of mounting base 1, and a return steam pipe 13 is installed at the outlet of the steam turbine body 2;

[0037] The connector 16 is connected to the liquid inlet pipe and the liquid outlet pipe respectively. The two ends of the heat exchange tube 14 are connected to the drain pipe 18 and the other end of the water inlet pipe 17. The main body of the heat exchange tube 14 is made of 25mm×2mm seamless steel pipe, and the pipe is installed in layers on the top, bottom and left and right. Multiple corrugated heat exchange substrates 19 are installed between each layer. The corrugated heat exchange substrate 19 has a rib height of 3mm, a pitch of 15mm and a thickness of 1mm. The corrugated heat exchange substrate 19 is integrally rolled with the wall of the heat exchange tube 14. The other end of the connecting pipe 15 is connected to the conveying structure so that the collected water can be discharged to the corresponding position for reuse. The return steam pipe 13 is connected to the front of the heat exchange box 3.

[0038] Please refer to Figure 1 A control box 11 with a door 12 is installed on the top of the mounting base 1, and an operation panel 10 is installed on one side of the control box 11.

[0039] The operation panel 10 can be used to set the equipment operating parameters. The door 12 is equipped with a lock. The control box 11 contains a power switch and a controller for the operation of auxiliary equipment.

[0040] Please refer to Figure 1 The mounting base 1 is equipped with a bracket 9 on its top, and a pressure regulating valve 7 with a connecting pipe 8 is installed on the top of the bracket 9.

[0041] The pressure regulating valve 7 can control the steam pressure entering the turbine body 2 as needed. The pressure regulating valve 7 is connected to the inlet of the steam inlet pipe 6.

[0042] Please refer to Figure 1 and Figure 2 The mounting base 1 includes a base plate 101, a mounting structure 102, and an adjustment structure 103. The mounting structure 102 is used to mount the adjustment structure 103 to the bottom of the base plate 101.

[0043] The threaded connection between the mounting structure 102 and the adjusting structure 103 allows for adjustment of the stability of the base plate 101 as needed.

[0044] Please refer to Figure 1 and Figure 2 The discharge assembly 4 includes a tapered collection pipe 401 and a discharge pipe 402, wherein the tapered collection pipe 401 is used to install the discharge pipe 402 on the back of the heat exchange box 3;

[0045] The conical manifold 401, in conjunction with the discharge pipe 402, can increase gas loss.

[0046] Please refer to Figure 2 and Figure 4The water receiving assembly 5 includes a water receiving pipe 501, a valve 502, a bend 503, and a water receiving frame 504. The water receiving frame 504 is installed on the back of the mounting base 1. The water receiving pipe 501 is used to install the valve 502 on the back of the heat exchange box 3. The bend 503 is used to connect the valve 502 and the water receiving frame 504.

[0047] The water inlet pipe 501 is located on the back of the heat exchange box 3 near the bottom. The bottom of the heat exchange box 3 has a certain slope. The valve 502 can be electrically controlled.

[0048] The working principle of the device for improving the cooling water efficiency of steam turbines provided by this utility model is as follows:

[0049] A heat exchange box 3 is installed on the top of the mounting base 1. Then, the return steam pipe 13 at the outlet of the turbine body 2 is connected to the inlet of the heat exchange box 3. The heat exchange box 3 is equipped with reciprocating layered heat exchange tubes 14, and multiple sets of corrugated heat exchange substrates 19 are installed between the multiple layers of heat exchange tubes 14. After the steam enters the heat exchange box 3 from the return steam pipe 13, it can move along the corrugated heat exchange substrates 19, which can increase the heat exchange contact area. At the same time, the contact positions of the corrugated heat exchange substrates 19 and the heat exchange tubes 14 are connected, which facilitates liquid flow and increases the heat exchange effect. A water receiving component 5 is installed on the back of the heat exchange box 3 to discharge the water condensed during the heat exchange process from the inside of the heat exchange box 3.

[0050] Compared with related technologies, the device for improving the efficiency of steam turbine cooling water provided by this utility model has the following beneficial effects:

[0051] To improve the efficiency of the turbine cooling water, a heat exchange box 3 is installed on the top of the mounting base 1. Then, the return steam pipe 13 at the outlet of the turbine body 2 is connected to the inlet of the heat exchange box 3. The heat exchange box 3 is equipped with reciprocating layered heat exchange tubes 14, and multiple sets of corrugated heat exchange substrates 19 are installed between the multi-layered heat exchange tubes 14. After the steam enters the heat exchange box 3 from the return steam pipe 13, it can move along the corrugated heat exchange substrates 19, which increases the heat exchange contact area. At the same time, the contact positions of the corrugated heat exchange substrates 19 and the heat exchange tubes 14 are connected, which facilitates liquid flow and increases the heat exchange effect. A water receiving component 5 is installed on the back of the heat exchange box 3 to discharge the water condensed during the heat exchange process from the inside of the heat exchange box 3. This design uses corrugated heat exchange substrates 19 to increase the contact area and time between the steam and the heat exchange tubes 14, thereby improving the heat exchange effect. The layered corrugated heat exchange substrates 19 also facilitate the dripping of condensate.

[0052] Second Embodiment

[0053] Please refer to the following: Figures 5-6 , Figure 5A schematic diagram of the second embodiment of the device for improving the efficiency of steam turbine cooling water provided by this utility model; Figure 6 Provided for this utility model Figure 5 The enlarged view at point C shows an apparatus for improving turbine cooling water efficiency based on the first embodiment of this application. The second embodiment of this application proposes another apparatus for improving turbine cooling water efficiency. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the independent implementation of the first embodiment.

[0054] Specifically, the difference between the device for improving turbine cooling water efficiency provided in the second embodiment of this application and the one described herein is as follows: Please refer to... Figure 5 The top of the heat exchange box 3 is equipped with an interception tank 24 via a fixed base 23. An installation pipe 22 is installed on the outer surface of the interception tank 24. A return flow structure 26 is installed on the bottom of the outer surface of the interception tank 24.

[0055] The return structure 26 includes pipes and valves to facilitate the collection of intercepted water into the water receiving assembly 5.

[0056] Please refer to Figure 5 and Figure 6 The interception barrel 24 is equipped with a conical separation core 25 inside, and a top cover 21 with an exhaust pipe 20 is installed on the top of the interception barrel 24.

[0057] The conical separator core has a pore diameter of 3-5mm and a porosity of ≥80%. When steam passes through the honeycomb pores, the remaining tiny water droplets are adsorbed by the pore walls, further purifying the steam. The separator core is treated with a hydrophobic coating.

[0058] Compared with related technologies, the device for improving the efficiency of steam turbine cooling water provided by this utility model has the following beneficial effects:

[0059] To reduce the water content of the condensed steam discharge, an interception tank 24 is installed on the top of the heat exchange box 3 via a fixed base 23. Inside the interception tank 24, a conical separation core 25 is installed. The conical separation core 25 impacts the discharged gas, causing water droplets to adhere and be intercepted. Finally, the water is returned to the water receiving assembly 5 through the return structure 26, increasing the water resource utilization rate. The gas that is intercepted in the second stage is discharged through the exhaust pipe 20.

[0060] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for improving the efficiency of steam turbine cooling water, characterized in that, include: Install the base frame; A heat exchange box is mounted on the top of a mounting frame. An inlet pipe and a drain pipe are respectively installed on one side of the heat exchange box. A connector is installed at one end of the drain pipe and the inlet pipe. A heat exchange tube is installed at the other end of the drain pipe and the inlet pipe. Multiple rows of corrugated heat exchange substrates are installed on the outer surface of the heat exchange tube. A discharge assembly is installed on the back of the heat exchange box. A water receiving assembly is installed on the back of the water receiving assembly. A connecting pipe is installed on the back of the water receiving assembly. The turbine body is mounted on top of the mounting base, and a return steam pipe is installed at the outlet of the turbine body.

2. The apparatus for improving the efficiency of steam turbine cooling water according to claim 1, characterized in that, A control box with a door is mounted on the top of the mounting base, and an operation panel is mounted on one side of the control box.

3. The apparatus for improving the efficiency of steam turbine cooling water according to claim 1, characterized in that, A bracket is mounted on the top of the mounting base, and a pressure regulating valve with a connecting pipe is mounted on the top of the bracket.

4. The apparatus for improving the efficiency of steam turbine cooling water according to claim 1, characterized in that, The mounting base includes a base plate, a mounting structure, and an adjustment structure. The mounting structure is used to mount the adjustment structure to the bottom of the base plate.

5. The apparatus for improving the efficiency of steam turbine cooling water according to claim 1, characterized in that, The discharge assembly includes a tapered manifold and a discharge pipe, the tapered manifold being used to mount the discharge pipe to the back of the heat exchanger.

6. The apparatus for improving the efficiency of steam turbine cooling water according to claim 1, characterized in that, The water receiving assembly includes a water receiving pipe, a valve, a bend, and a water receiving frame. The water receiving frame is installed on the back of the mounting base. The water receiving pipe is used to install the valve on the back of the heat exchange box. The bend is used to connect the valve and the water receiving frame.

7. The apparatus for improving the efficiency of steam turbine cooling water according to claim 1, characterized in that, An interceptor barrel is mounted on the top of the heat exchange box via a fixed base. An installation pipe is mounted on the outer surface of the interceptor barrel, and a reflux structure is mounted on the bottom of the outer surface of the interceptor barrel.

8. The apparatus for improving the efficiency of steam turbine cooling water according to claim 7, characterized in that, The interception barrel is equipped with a conical separation core inside, and a top cover with an exhaust pipe is installed on the top of the interception barrel.

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