Turbine cold end cooling device based on non-equal height arrangement

Abstract

The utility model discloses a turbine cold end cooling device based on non-equal height arrangement belongs to turbine exhaust cooling equipment technical field, including condensation shell, condensation mechanism, support and circulating mechanism, circulating mechanism is erected at the top of condensation shell through support, and circulating mechanism includes cooling tower, water collecting pool and circulating pump, and with condensation mechanism forms closed cooling water circulation loop, and the front side of condensation shell still is connected with cooling cavity, and the heat conduction fin is equipped in cooling cavity, and the outer wall of cooling cavity is equipped with fan. The utility model discloses through the non-equal height arrangement of three -dimensional type, solved the problem that the existing device occupies large area, reached compact structure, the effect of saving space, through the cooling cavity of additional wind -driven fan carries out forced air cooling to the non -condensable gas, solved the problem that the cooling is not sufficient, reached the beneficial effect of good cooling effect, is favorable to maintaining system high -efficient operation.

Description

Technical Field

[0001] This utility model relates to the technical field of steam turbine exhaust cooling equipment, and in particular to a steam turbine cold end cooling device based on non-equal height arrangement. Background Technology

[0002] The task of the steam turbine cold end system is to cool and condense the exhaust steam after the steam turbine has done its work, and to establish and maintain a high vacuum at the steam turbine exhaust port, thereby increasing the effective enthalpy drop of steam in the steam turbine and improving the unit's cycle thermal efficiency. Currently, the core equipment to achieve this function is the condenser and the circulating cooling water system that provides it with cooling medium.

[0003] In conventional thermal power plants and industrial steam turbine applications, the cold-end system equipment of condensers, cooling towers, and circulating water pumps is arranged in a planar layout, that is, various large components are dispersed and installed in a wide area on the same floor and different floors. This traditional planar layout firstly results in the entire cold-end system occupying a huge area, increasing the civil engineering cost of the plant and the occupation of land resources.

[0004] Given this decentralized layout, the circulating water pipes connecting the condenser, circulating water pumps, and cooling towers often require long distances and complex routes. The excessively long pipes not only increase the initial investment cost and installation difficulty, but more importantly, they increase the frictional and local resistance of the cooling water during transportation. This forces the system to be equipped with more powerful circulating water pumps to overcome these resistances, resulting in increased auxiliary power consumption of the entire system and reduced net efficiency of the unit.

[0005] In addition, the exhaust steam discharged from the turbine inevitably contains a small amount of non-condensable gases. If these gases cannot be effectively extracted, they will accumulate in the condenser, deteriorating the heat transfer effect and destroying the vacuum. Although the existing system is equipped with a vacuum pump to remove non-condensable gases, the secondary cooling and separation effect of the remaining gas and water vapor mixture is often not ideal after most of the water vapor has been condensed in the main condensation zone. This limits the further improvement and stability of the unit's vacuum to a certain extent.

[0006] Therefore, this utility model proposes a turbine cold-end cooling device based on non-equal height arrangement to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems of large footprint, complex piping connections, and insufficient cooling of non-condensable gases in the existing turbine cold end cooling devices based on non-equal height arrangement, this utility model aims to provide a turbine cold end cooling device with improved structure that can effectively solve the above problems based on non-equal height arrangement.

[0008] This utility model provides a turbine cold end cooling device based on non-equal height arrangement, including a condenser shell, a condenser mechanism disposed inside the condenser shell, a bracket mounted on the top of the condenser shell, and a circulation mechanism installed on the bracket.

[0009] The circulation mechanism includes a cooling tower, a water collection tank, and a circulation pump.

[0010] Furthermore, the cooling tower, water collection tank, circulating pump, and condensing mechanism are connected by pipelines. The specific locations and connections are as follows: the cooling tower is located above the water collection tank, and the outlet of the cooling tower is connected to the water collection tank; the outlet of the water collection tank is connected to the inlet of the circulating pump, the outlet of the circulating pump is connected to the inlet of the condensing mechanism, and the outlet of the condensing mechanism is connected to the inlet of the cooling tower, thus forming a closed cooling water circulation loop.

[0011] Preferably, the condensation mechanism includes a heat exchange plate one and a heat exchange plate two fixed inside the condensation shell, and heat exchange tubes arranged on the heat exchange plate one and the heat exchange plate two.

[0012] Preferably, multiple mutually isolated air chambers are formed between the condenser shell and heat exchange plate one and heat exchange plate two; a vent seat for water vapor to enter is provided on the rear side of the condenser shell.

[0013] Preferably, a cooling chamber is also connected to the front side of the condenser shell, and the cooling chamber is connected to the internal space of the condenser shell.

[0014] Preferably, the cooling chamber is equipped with heat-conducting fins, and the outer wall of the cooling chamber is also equipped with a fan, which is used to force-cool the heat-conducting fins.

[0015] Preferably, a water distribution pipe is also provided between the outlet of the circulating pump and the inlet of the condenser.

[0016] Preferably, the top of the heat exchange tube extends into a liquid inlet pipe, which serves as the water inlet for the condenser mechanism. The liquid inlet pipe is connected to the water distribution pipe and passes through the top of the cooling chamber.

[0017] Preferably, a delivery pump is placed on top of the condenser shell, and the output end of the delivery pump is connected to the water distribution pipe.

[0018] Preferably, the front side of the condenser shell is also fixed with an output port for discharging cooled gas.

[0019] This utility model has the following beneficial effects: 1. This utility model solves the problem of large footprint and complex piping caused by the dispersed arrangement of various components in existing cooling devices by mounting the circulation mechanism for cooling water on top of the condensation mechanism for steam condensation, forming a three-dimensional non-equal height arrangement structure with upper cooling and lower condensation. It achieves the beneficial effects of compact structure, saving installation space and simplifying pipeline layout.

[0020] 2. This utility model, by adding a cooling chamber with built-in heat-conducting fins and an external fan downstream of the main condensation zone of water vapor, performs forced air cooling to deeply treat the remaining non-condensable gases after preliminary condensation. This solves the problem of insufficient cooling of non-condensable gases in the existing technology, which affects the turbine vacuum. It achieves the beneficial effects of more thorough cooling of exhaust steam, better condensation effect, and conducive to maintaining the efficient operation of the system. Attached Figure Description

[0021] Figure 1 This is a perspective view of the turbine cold-end cooling device based on non-equal height arrangement proposed in this utility model; Figure 2 This is a split view of the condenser shell in the turbine cold-end cooling device based on non-equal height arrangement proposed in this utility model. Figure 3 This is a schematic diagram of the heat exchange tube structure in the turbine cold-end cooling device based on non-equal height arrangement proposed in this utility model; Figure 4 This is a split view of the cooling chamber in the turbine cold-end cooling device based on non-equal height arrangement proposed in this utility model.

[0022] Legend: 1. Condensing shell; 2. Support frame; 3. Condensing mechanism; 31. Vent seat; 32. Heat exchanger plate one; 33. Heat exchanger plate two; 34. Heat exchanger tube; 35. Liquid inlet pipe; 36. Cooling chamber; 37. Heat-conducting fins; 38. Fan; 39. Output interface; 4. Circulation mechanism; 41. Cooling tower; 42. Water collection tank; 43. Circulation pump; 44. Transfer pump; 45. Water distribution pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] Example: Please refer to Figure 1The turbine cold-end cooling device based on non-equal height arrangement includes a condenser shell 1 as the overall installation base, a condenser mechanism 3 set inside the condenser shell 1, a support 2 erected on the top of the condenser shell 1, and a circulation mechanism 4 installed on the support 2. The condenser mechanism 3 is used to condense the water vapor discharged from the turbine, and the circulation mechanism 4 is used to provide circulating cooling water to the condenser mechanism 3. The support 2 is fixedly connected to the condenser shell 1 by welding, thereby forming a three-dimensional structure with non-equal height arrangement between the circulation mechanism 4 and the condenser mechanism 3. The condenser mechanism 3 and the circulation mechanism 4 are connected by pipelines to form a complete closed loop. Specifically, the main structure of the condenser mechanism 3 is housed and fixed in the condenser shell 1. The main components of the circulation mechanism 4 include a water collection tank 42 installed and fixed on the top of the support 2, a cooling tower 41 connected to the top of the water collection tank 42, and a circulation pump 43 for providing circulation power. The whole device has a compact structure and makes effective use of vertical space.

[0025] Please refer to Figure 2 , Figure 3 and Figure 4 The condensation mechanism 3 includes a heat exchange plate 32 and a heat exchange plate 33 welded and fixed inside the condensation shell 1, as well as a heat exchange tube 34. Multiple mutually isolated air chambers are formed between the condensation shell 1 and the heat exchange plates 32 and 33 through welding seals, which guide the flow path of water vapor; Figure 3 As shown, heat exchange tubes 34 are fixed to the inner side of heat exchange plate 1 32 and the outer side of heat exchange plate 2 33, respectively, and an inlet pipe 35 extends integrally from the top of the heat exchange tubes 34; a vent seat 31 for water vapor to enter is welded to the rear side of the condenser shell 1; in order to achieve deep cooling of non-condensable gases, a cooling chamber 36 is also welded to the front side of the condenser shell 1, and the internal space of the cooling chamber 36 is connected to the internal space of the condenser shell 1, so that the remaining gas after preliminary condensation can flow into the cooling chamber 36; as Figure 4 As shown, heat-conducting fins 37 with a large heat dissipation area are installed inside the cooling chamber 36. A fan 38 is also fixed to the top of the outer wall of the cooling chamber 36 by bolts. The fan 38 faces the heat-conducting fins 37 and is used to force-cool the heat-conducting fins 37, thereby quickly removing heat. Finally, an output port 39 for discharging cooled gas is fixed on the front side of the condenser shell 1. This structure, which combines the main condensation zone and the secondary forced air cooling zone, ensures sufficient cooling and condensation of the turbine exhaust.

[0026] In a preferred embodiment, to achieve efficient and uniform distribution of cooling water, a water distribution pipe 45 is provided between the outlet of the circulating pump 43 and the inlet of the condenser 3. The circulating pump 43 pumps the cooling water in the collection tank 42 to the water distribution pipe 45 through a pipeline, and the water distribution pipe 45 then distributes the cooling water to multiple liquid inlet pipes 35. Specifically, the top of the heat exchange tube 34 extends upward integrally to form the liquid inlet pipe 35, which constitutes the inlet of the condenser 3. The top end of the liquid inlet pipe 35 is connected to the water distribution pipe 45 by threads and flanges. After absorbing heat, the cooling water flows from the heat exchange tube 34 into the water distribution pipe 45. The water flows out from the bottom outlet of heat pipe 34, collects, and flows back to the top inlet of cooling tower 41 through the pipeline, thus completing the circulation. As another preferred embodiment, in order to make the overall structure more compact and optimize the pipeline layout, the body of the liquid inlet pipe 35 vertically penetrates the top plate of the cooling chamber 36, and the connection between the liquid inlet pipe 35 and the top of the cooling chamber 36 is welded and sealed to ensure the airtightness of the cooling chamber 36. This design enables the cooling water input pipeline and the non-condensable gas cooling area to be spatially integrated, reducing the complexity of external pipelines.

[0027] Working principle: Before use, first install the condenser mechanism 3, fix the heat exchange tube 34 to the inner side of the two heat exchange plates 32 and the outer side of the two heat exchange plates 33, and then weld the whole assembly to the inside of the condenser shell 1. The condenser shell 1 forms three isolated gas chambers between the heat exchange plates 32 and 33. The heat exchange tube 34 is divided into four parts, which are respectively connected to the two heat exchange plates 32 and 33. The top of each of the four parts of the heat exchange tube 34 extends into a liquid inlet pipe 35. Vent seat 31 is welded to the rear side of condenser shell 1, and cooling cavity 36 is welded to the front side of condenser shell 1. Liquid inlet pipe 35 extends through the top of cooling cavity 36. A square groove for installation is opened on the top of cooling cavity 36. Heat conduction fins 37 are installed on the top of cooling cavity 36. Fan 38 is attached to the top of heat conduction fins 37. Finally, output interface 39 is fixed to the front side of condenser shell 1. The fully installed condenser shell 1 is placed in the preset position to complete the installation of condenser mechanism 3. Then install the circulation mechanism 4, set up the bracket 2 on the top rear side of the condenser shell 1, install and fix the water collection tank 42 at the top center of the bracket 2, connect the interface at the bottom of the cooling tower 41 with the interface at the top of the water collection tank 42, and complete the installation of the cooling tower 41. Place the delivery pump 44 on the top of the condenser shell 1, connect the delivery pump 44 to the outlet of the water collection tank 42, connect the top of the liquid inlet pipe 35 to the water distribution pipe 45, then connect the water distribution pipe 45 to the delivery pump 44, connect the outlet of the heat exchange pipe 34 to the delivery pump 44, and connect the output end of the delivery pump 44 to the top of the cooling tower 41 to form a complete circulating water circuit. In use, the delivery pump 44 is started first to guide the cooling water in the water collection tank 42 into the heat exchange tube 34 through the water distribution pipe 45. The water vapor generated by the turbine enters the interior of the condenser shell 1 from the vent seat 31. When the water vapor passes through the heat exchange plate 1 32 and the heat exchange plate 2 33, the cooling water absorbs the heat of the water vapor through the heat exchange tube 34 and the heat exchange plate 1 32 and the heat exchange plate 2 33. The water vapor condenses on the outer wall of the heat exchange plate 1 32 and the heat exchange plate 2 33 to form condensate. Under the action of gravity, it flows down naturally and collects at the bottom of the condenser shell 1. It is discharged from the preset outlet at the bottom of the condenser shell 1. The gas after removing the moisture from the water vapor flows into the cooling chamber 36 and is quickly cooled by the heat-conducting fins 37. The fan 38 promptly removes the heat, realizing the cooling treatment and discharge of the water vapor from the turbine. The cooling water that absorbs heat in the heat exchange tube 34 is discharged from the bottom and pumped back to the top of the cooling tower 41 by the circulating pump 43, completing the complete cooling cycle.

Claims

1. A turbine cold-end cooling device based on a non-uniform height arrangement, comprising a condenser shell (1), a condensing mechanism (3) disposed within the condenser shell (1), a support (2) mounted on the top of the condenser shell (1), and a circulation mechanism (4) mounted on the support (2); characterized in that, The circulation mechanism (4) includes a cooling tower (41), a water collection tank (42), and a circulation pump (43); the cooling tower (41) is located above the water collection tank (42), and the outlet of the cooling tower (41) is connected to the water collection tank (42); The outlet of the water collection tank (42) is connected to the inlet of the circulating pump (43). The outlet of the circulating pump (43) is connected to the inlet of the condensing mechanism (3), and the outlet of the condensing mechanism (3) is connected to the inlet of the cooling tower (41), thereby forming a closed cooling water circulation loop.

2. The turbine cold-end cooling device based on non-equal height arrangement according to claim 1, characterized in that, The condensing mechanism (3) includes a heat exchange plate one (32) and a heat exchange plate two (33) fixed inside the condensing shell (1), and a heat exchange tube (34) arranged on the heat exchange plate one (32) and the heat exchange plate two (33).

3. The turbine cold-end cooling device based on non-uniform height arrangement according to claim 2, characterized in that, The condenser shell (1) forms multiple mutually isolated air chambers with the heat exchange plate one (32) and the heat exchange plate two (33), and the rear side of the condenser shell (1) is provided with a vent seat (31) for water vapor to enter.

4. The turbine cold-end cooling device based on non-uniform height arrangement according to claim 2, characterized in that, The front side of the condensing shell (1) is also connected to a cooling chamber (36), which is connected to the internal space of the condensing shell (1).

5. The turbine cold-end cooling device based on non-uniform height arrangement according to claim 4, characterized in that, The cooling chamber (36) is provided with heat-conducting fins (37), and the outer wall of the cooling chamber (36) is also provided with a fan (38), which is used to force the heat-conducting fins (37) to be cooled by air.

6. The turbine cold-end cooling device based on non-equal height arrangement according to claim 4, characterized in that, A water distribution pipe (45) is also provided between the outlet of the circulating pump (43) and the inlet of the condensing mechanism (3).

7. The turbine cold-end cooling device based on non-equal height arrangement according to claim 6, characterized in that, The top of the heat exchange tube (34) extends into a liquid inlet pipe (35) which serves as the water inlet of the condenser (3). The liquid inlet pipe (35) is connected to the water distribution pipe (45) and passes through the top of the cooling chamber (36).

8. The turbine cold-end cooling device based on non-equal height arrangement according to claim 6, characterized in that, A delivery pump (44) is placed on top of the condenser shell (1), and the output end of the delivery pump (44) is connected to the water distribution pipe (45).

9. The turbine cold-end cooling device based on non-equal height arrangement according to claim 4, characterized in that, The front side of the condenser shell (1) is also fixed with an output port (39) for discharging cooled gas.

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