Condensing system and generator set

Abstract

The application relates to the technical field of thermal power generation, and discloses a condensing system and a generator set. The condensing system comprises a main body, a first pump set, a second pump set and a maintenance device. The first pump set comprises at least one first vacuum pump, and the second pump set comprises at least one second vacuum pump. The first vacuum pump is in communication with a high-pressure side inner cavity in the main body, and the second vacuum pump is in communication with a low-pressure side inner cavity. The high-pressure side inner cavity and the low-pressure side inner cavity are distributed along a first direction. The maintenance device, the first pump set and the second pump set are located on the same side of a boundary line, and the first pump set and the second pump set are distributed along the first direction. The structure arrangement of the condensing system is more concentrated, space is saved, the later-stage maintenance of the first pump set and the second pump set is facilitated, and the cost is reduced. Moreover, the high-pressure side inner cavity and the low-pressure side inner cavity are respectively vacuumized by the first pump set and the second pump set, the vacuum environment inside the condenser can be quickly established when the steam turbine is started, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of thermal power generation technology, and in particular to a condensing steam system and generator set. Background Technology

[0002] In thermal power generation technology, the condenser is an indispensable key piece of equipment, directly affecting the power plant's operating efficiency, economy, and stability. Connected to the steam turbine, the condenser cools the steam discharged after the turbine has performed its work, condensing it into water. This creates a negative pressure near the turbine exhaust port, allowing the steam to expand fully and perform work, thus improving the efficiency of the thermal cycle. The condensed water is returned to the boiler as feedwater for reuse. The condenser's vacuum system removes air and other non-condensable gases from within the condenser, ensuring a vacuum environment that directly impacts turbine efficiency, equipment lifespan, and operational safety.

[0003] With technological advancements, the design parameters and regenerative stage requirements for power plant units are constantly increasing, primarily to improve unit economics and meet the requirements of the new generation of coal-fired power technology standards. The turbine hall is used for the layout and installation of steam turbines, generators, condensers, and other components. As power plant unit parameters continue to increase, the external dimensions of various equipment become relatively bulky. Furthermore, to reduce land costs and optimize management, the layout of the main power plant building is typically optimized in depth, minimizing the overall size of the turbine hall and deaerator while still meeting process requirements. This leads to a shortage of space for equipment placement in the turbine hall, especially for projects with increasingly higher unit parameters in the future, where the available space in the turbine hall will be significantly reduced. The shrinking usable area of ​​the turbine hall results in increasingly limited space for equipment and piping, compressing maintenance and repair space and reducing the safety of the process system. Utility Model Content

[0004] The technical problem to be solved by this utility model is that in the prior art, the equipment of power plant units is bloated and the usable area of ​​the turbine room is constantly shrinking, which makes the space for equipment and pipeline layout in the turbine room increasingly tight, the cost of upgrading and renovation is high, and the maintenance and repair space is compressed, resulting in a decline in safety.

[0005] To solve the above-mentioned technical problems, this utility model provides a condensing system, located in a turbine hall, the condensing system comprising:

[0006] The main body has a high-pressure side cavity and a low-pressure side cavity that are interconnected.

[0007] A first pump group, the first pump group including at least one first vacuum pump, the first vacuum pump being in communication with the high-pressure side cavity;

[0008] The second pump set includes at least one second vacuum pump, which is connected to the low-pressure side cavity.

[0009] Within the same horizontal plane, the high-pressure side cavity and the low-pressure side cavity are distributed along a first direction, with the center line between the high-pressure side cavity and the low-pressure side cavity serving as the dividing line, and the first pump group and the second pump group are distributed along the first direction;

[0010] The maintenance device, the first pump group, and the second pump group are all located on the same side of the dividing line. The maintenance device includes a guide rail and a crane. The guide rail extends along the first direction and is located above the first pump group and the second pump group. The crane is connected to the guide rail and can move along the guide rail.

[0011] According to one embodiment of the present invention, the first pump group includes a first air extraction pipe and two first vacuum pumps, the two first vacuum pumps being a first pump and a second pump, the first pump and the second pump being connected in parallel to the first air extraction pipe, the first pump and the second pump being distributed along a second direction, the second direction being in the same horizontal plane as the first direction and perpendicular to each other;

[0012] The second pump set includes a second air extraction pipe and two second vacuum pumps, the two second vacuum pumps being a third pump and a fourth pump, the third pump and the fourth pump being connected in parallel to the second air extraction pipe, and the third pump and the fourth pump being distributed along the second direction.

[0013] According to one embodiment of the present invention, the first pump group further includes a first water vapor separator and a first exhaust pipe. The first water vapor separator is provided with a first air inlet, a second air inlet and a first exhaust port. The first air inlet is connected to and communicates with the first pump, and the second air inlet is connected to and communicates with the second pump.

[0014] The first exhaust pipe is connected to the first exhaust port to discharge the gas separated in the first water-vapor separator to the outside of the turbine room.

[0015] According to one embodiment of the present invention, the second pump group further includes a second water vapor separator and a second exhaust pipe. The second water vapor separator is provided with a third air inlet, a fourth air inlet and a second exhaust port. The third air inlet is connected to and communicates with the third pump, and the fourth air inlet is connected to and communicates with the fourth pump.

[0016] The second exhaust pipe is connected to the second exhaust port to discharge the gas separated in the second water-vapor separator to the outside of the turbine room.

[0017] According to one embodiment of the present invention, the condensing system further includes a main exhaust pipe, wherein the first exhaust pipe and the second exhaust pipe are connected in parallel to the main exhaust pipe.

[0018] According to one embodiment of the present invention, the first pump and the second pump are spaced apart, the third pump and the fourth pump are spaced apart, the first pump and the third pump are on the same straight line, and the second pump and the fourth pump are located on the same straight line.

[0019] The orthographic projection of the guide rail onto the mounting surface of the first pump set falls on the first pump and the third pump.

[0020] According to one embodiment of the present invention, the crane includes a vehicle body, a lifting frame, and a hook. The vehicle body is movably connected to a guide rail, the lifting frame is connected to the vehicle body, and the end of the lifting frame away from the vehicle body is movable relative to the vehicle body in a third direction perpendicular to a first direction. The hook is connected to the end of the lifting frame away from the vehicle body.

[0021] This utility model also provides a generator set, including:

[0022] The condensing system described above;

[0023] A steam turbine is located on the upper side of the main body and is connected to the main body;

[0024] A generator, which is connected to the steam turbine;

[0025] An excitation transformer, which is connected to the generator,

[0026] The side containing the high-voltage side cavity is the first region, and the side containing the low-voltage side cavity is the second region. The maintenance device, the first pump group, and the second pump group are all located in the first region, and the excitation transformer is located in the second region.

[0027] Compared with the prior art, the condensing system of this utility model has the following advantages:

[0028] The condensing system of this embodiment uses a first pump group and a second pump group to evacuate the high-pressure side cavity and the low-pressure side cavity respectively. This allows for faster establishment of a vacuum environment inside the condenser during turbine startup, improving production efficiency. By placing the first and second pump groups on the same side of the dividing line and distributing them along a first direction, the condensing system's structural layout is more concentrated, facilitating later maintenance of both pump groups, saving internal space in the turbine hall, and reducing the cost of upgrading and retrofitting power plant units. Attached Figure Description

[0029] Figure 1 This is a partial structural schematic diagram of the condenser provided in an embodiment of the present invention.

[0030] Figure 2 This is one of the partial structural schematic diagrams of the condensing system provided in this embodiment of the utility model.

[0031] Figure 3 This is the second partial structural schematic diagram of the condensing system provided in this embodiment of the utility model.

[0032] Figure 4 This is a schematic diagram of the maintenance device and the first pump set provided in this embodiment of the utility model.

[0033] Figure label:

[0034] 110. Main body; 111. First shell; 112. Second shell;

[0035] 120. First pump unit; 121. First vacuum pump; 122. First pump; 123. Second pump; 124. First water vapor separator; 1241. First air inlet; 1242. Second air inlet; 1243. First exhaust port; 125. First exhaust pipe; 126. First extraction pipe; 127. First base; 128. First heat exchanger;

[0036] 130. Second pump unit; 131. Second vacuum pump; 132. Third pump; 133. Fourth pump; 134. Second water vapor separator; 1341. Third air inlet; 1342. Fourth air inlet; 1343. Second exhaust port; 135. Second exhaust pipe; 136. Second extraction pipe; 137. Second base; 138. Second heat exchanger;

[0037] 140. Maintenance equipment; 141. Guide rail; 142. Crane; 143. Car body; 144. Lifting frame; 145. Hook; 160. Main exhaust pipe; 170. Excitation transformer; 200. Turbine room;

[0038] A, First region; B, Second region; C, Boundary line; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0039] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0040] In the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the embodiments of this utility model, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] like Figure 1 and Figure 3 As shown in the figure, a condensing system according to an embodiment of the present invention is located in a turbine hall. The condensing system includes a main body 110, a first pump group 120, a second pump group 130, and a maintenance device 140.

[0044] Specifically, the main body 110 has interconnected high-pressure side and low-pressure side cavities, with the high-pressure side cavity connected to the turbine's exhaust port. It can be understood that the steam discharged from the turbine flows from the high-pressure side cavity to the low-pressure side cavity, where its temperature and pressure decrease. For example... Figure 1As shown, in some embodiments, the main body 110 includes a first housing 111 and a second housing 112. A high-pressure side cavity is formed within the first housing 111, which is connected and communicates with the turbine's exhaust port. A low-pressure side cavity is formed within the second housing 112, and the low-pressure side cavity and the high-pressure side cavity together form a condensing chamber. The first pump group 120 includes at least one first vacuum pump 121, which communicates with the high-pressure side cavity. The second pump group 130 includes at least one second vacuum pump 131, which communicates with the low-pressure side cavity. Thus, non-condensable gases such as air are discharged from the high-pressure side cavity via the first vacuum pump 121, and non-condensable gases such as air are discharged from the low-pressure side cavity via the second vacuum pump 131, thereby accelerating the establishment of a vacuum environment inside the condenser when the turbine is started.

[0045] like Figure 1 As shown, within the same horizontal plane, the high-pressure side cavity and the low-pressure side cavity are distributed along the first direction X. The center line between the high-pressure side cavity and the low-pressure side cavity is the dividing line C. The dividing line C is perpendicular to the first direction X. The high-pressure side cavity is located on one side of the dividing line C, and the low-pressure side cavity is located on the other side of the dividing line C.

[0046] like Figure 3 and Figure 4As shown, the condensing system also includes a maintenance device 140, which can hoist the first pump group 120 and the second pump group 130 for maintenance or installation. The maintenance device 140, the first pump group 120, and the second pump group 130 are located on the same side of the dividing line C to make the structure of the condensing system more concentrated. Furthermore, the first pump group 120 and the second pump group 130 are distributed along the first direction X to avoid the condensing system occupying too much space in the second direction Y. The maintenance device 140 includes a guide rail 141 and a crane 142. The guide rail 141 extends along the first direction X and is located above the first pump group 120 and the second pump group 130. Specifically, the guide rail 141 is located on the top of the turbine hall 200 and corresponds to the first pump group 120 and the second pump group 130. Crane 142 is connected to guide rail 141 and can move along guide rail 141. Crane 142 is used to lift components of the first pump group 120 or the second pump group 130 for maintenance. It is understandable that in the prior art, with the continuous improvement of parameters, the shape of various equipment in the turbine hall 200 has become relatively bulky. The original turbine hall 200 is difficult to accommodate the installation of various equipment, often requiring the construction of an external structure to install the excitation transformer 170 and PT cabinet (voltage transformer cabinet) of the power plant unit, resulting in high cost of the turbine hall 200. By placing the first pump group 120 and the second pump group 130 on the same side of the dividing line C, and distributing the first pump group 120 and the second pump group 130 along the first direction X. This arrangement offers several advantages. First, it allows for a more centralized condensing system structure, facilitating the later maintenance of the first pump group 120 and the second pump group 130. By placing the first pump group 120 and the second pump group 130 separately on the same side of the boundary line C, interference with other equipment during maintenance is reduced. Second, it leaves the space on the other side of the boundary line C within the turbine hall 200 vacant for the installation of other generator equipment such as the excitation transformer, eliminating the need for an external shelter and reducing costs. Furthermore, when upgrading or modifying the generator sets, the existing internal space of the turbine hall 200 can be fully utilized, further reducing the cost of the upgrade.

[0047] According to some embodiments of this utility model, by using the first vacuum pump 121 and the second vacuum pump 131 to evacuate the high-pressure side cavity and the low-pressure side cavity respectively, a vacuum environment can be established inside the condenser more quickly when the steam turbine is started, thereby improving production efficiency. By placing the first pump group 120 and the second pump group 130 on the same side of the dividing line C, and distributing the first pump group 120 and the second pump group 130 along the first direction X, the structure of the condensing system is made more concentrated, which facilitates the later maintenance of the first pump group 120 and the second pump group 130, saves the internal space of the turbine hall 200, and reduces the cost of upgrading and retrofitting the power plant unit.

[0048] like Figure 1As shown, according to some embodiments of this utility model, the side containing the high-pressure side cavity is designated as a first region A, and the side containing the low-pressure side cavity is designated as a second region B. The first region A contains a first base 127 and a second base 137 distributed along a first direction X. A first pump unit 120 is connected to the first base 127, and a second pump unit 130 is connected to the second base 137. This avoids increasing the length of the first extraction pipe 126 and the distance between the first pump unit 120 and the high-pressure side, thereby accelerating the air discharge from the high-pressure side cavity during turbine startup. The first pump unit 120 can be connected to the first base 127 using bolts or other fasteners, and the second pump unit 130 can be connected to the second base 137 using bolts or other fasteners.

[0049] like Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the first pump group 120 includes a first suction pipe 126 and two first vacuum pumps 121, which are respectively a first pump 122 and a second pump 123. One end of the first suction pipe 126 is connected to the high-pressure side cavity, and a check valve is provided at the connection between the first suction pipe 126 and the high-pressure side cavity; the first pump 122 and the second pump 123 are connected in parallel to the other end of the first suction pipe 126, and the first pump 122 and the second pump 123 are distributed along a second direction Y, which is perpendicular to the first direction X and located on the same horizontal plane as the first direction X. The second pump group 130 includes a second suction pipe 136 and two second vacuum pumps 131, which are respectively a third pump 132 and a fourth pump 133. One end of the second extraction pipe 136 is connected to the low-pressure side cavity, and a check valve is provided at the connection point between the second extraction pipe 136 and the low-pressure side cavity; the third pump 132 and the fourth pump 133 are connected in parallel to the other end of the second extraction pipe 136, and the third pump 132 and the fourth pump 133 are distributed in the second direction Y. This is to make full use of the space within the turbine hall 200 and reduce the space occupied by the first pump group 120 and the second pump group 130 in the second direction Y. In some embodiments, the capacity of the first pump 122 is greater than the capacity of the second pump 123, and during operation, at least one of the first pump and the second pump 123 is selected to be turned on according to the power of the turbine; the capacity of the third pump 132 is greater than the capacity of the fourth pump 133, and during operation, at least one of the third pump 132 and the fourth pump 133 is selected to be turned on according to the power of the turbine.

[0050] like Figure 3According to some embodiments of the present invention, the first pump group 120 further includes a first water vapor separator 124 and a first exhaust pipe 125. The first water vapor separator 124 is provided with a first air inlet 1241, a second air inlet 1242, and a first exhaust port 1243. The first air inlet 1241 is connected to and communicates with the first pump 122, and a check valve may be provided at the connection between the first air inlet 1241 and the first pump 122. The second air inlet 1242 is connected to and communicates with the second pump 123, and a check valve is provided at the connection between the second air inlet 1242 and the second pump 123. This allows water vapor in the gas discharged from the first pump 122 and the third pump 132 to condense and be recycled. The first water vapor separator is mounted on the first base 127 to reduce the length of the connecting pipe between the first water vapor separator and the first pump 122 and the third pump 132, and to facilitate subsequent maintenance. The first exhaust pipe 125 is connected to the first exhaust port 1243 to discharge the gas separated in the first water vapor separator 124 to the outside of the turbine room 200.

[0051] In some embodiments, the first pump assembly 120 further includes at least one first heat exchange device 128, which is connected to the first vacuum pump 121 to cool the heat exchange fluid within the first vacuum pump 121. The first heat exchange device 128 may be connected to the drain outlet of a first water vapor separator to recover water separated by the first water vapor separator for use in cooling the heat exchange fluid of the first vacuum pump 121. Figure 3 As shown, there can be two first heat exchange devices 128, one of which is connected to the first pump 122 and the other is connected to the second pump 123.

[0052] According to some embodiments of this utility model, the second pump set 130 further includes a second water vapor separator 134 and a second exhaust pipe 135. The second water vapor separator 134 is provided with a third air inlet 1341, a fourth air inlet 1342, and a second exhaust port 1343. The third air inlet 1341 is connected to and communicates with the third pump 132, and a check valve is provided at the connection between the third air inlet 1341 and the third pump 132; the fourth air inlet 1342 is connected to and communicates with the fourth pump 133, and a check valve is provided at the connection between the fourth air inlet 1342 and the fourth pump 133. The second water vapor separator 134 is mounted on the second base 137 to reduce the length of the connecting pipes between the second water vapor separator 134 and the third pump 132 and the fourth pump 133. The second exhaust pipe 135 communicates with the second exhaust port 1343 to discharge the gas separated in the second water vapor separator 134 to the outside of the turbine hall 200. The condensing system may also include a main exhaust pipe 160, one end of which is located inside the turbine hall 200 and the other end extends outside the turbine hall 200. A second exhaust pipe 135 and a first exhaust pipe 125 are connected in parallel to the main exhaust pipe 160.

[0053] In some embodiments, the second pump assembly 130 further includes at least one second heat exchange device 138, which is connected to the second vacuum pump 131 to cool the heat exchange fluid within the second vacuum pump 131. The second heat exchange device 138 may be connected to the drain outlet of the second water vapor separator to recover the water separated by the second water vapor separator and use it to cool the heat exchange fluid of the second vacuum pump 131. Figure 3 As shown, there can be two second heat exchangers 138, one of which is connected to the third pump 132 and the other is connected to the fourth pump 133.

[0054] like Figure 4 As shown, according to some embodiments of the present invention, the crane 142 includes a vehicle body 143, a lifting frame 144, and a hook 145. The vehicle body 143 is movably connected to a guide rail. Specifically, the vehicle body 143 is provided with wheels, which are connected to the guide rail and can roll or slide along the guide rail. The lifting frame 144 is connected to the vehicle body 143, and the end of the lifting frame 144 away from the vehicle body 143 can move relative to the vehicle body 143 in a third direction Z. The third direction Z is perpendicular to the first direction X and perpendicular to the second direction Y. Figure 4 As shown, the third direction Z coincides with the vertical direction. The hook 145 is connected to the end of the lifting frame 144 away from the vehicle body 143, and the hook 145 lifts the components of the first pump group and the second pump group through steel cables, etc.

[0055] like Figure 3 As shown, according to some embodiments of the present invention, the first pump 122 and the second pump 123 are spaced apart, the third pump 132 and the fourth pump 133 are spaced apart, the first pump 122 and the third pump 132 are spaced apart and on the same straight line, and the second pump 123 and the fourth pump 133 are spaced apart and on the same straight line, to facilitate the installation of the first pump group 120 and the second pump group 130. The orthographic projection of the guide rail 141 on the mounting surface of the first pump group 120 falls on the first pump 122 and the third pump 132. Since the first pump group 120 and the second pump group 130 are located on the same side of the dividing line C, when the maintenance device 140 is installed, the first pump group 120 and the second pump group 130 can share a set of maintenance devices 140, reducing costs and expanding the maintenance space. It should be noted that the power of the first pump 122 is greater than that of the second pump 123, and the volume and weight of the first pump 122 are both greater than the power of the second pump 123; the power of the third pump 132 is greater than that of the fourth pump 133, and the volume and weight of the third pump 132 are both greater than the power of the fourth pump 133. The guide rail 141 is positioned above the first pump 122 and the third pump 132 to prevent the crane 142 from deviating too far from the first pump 122 and the third pump 132, thereby reducing the eccentric force experienced by the crane 142 when lifting the first pump 122 or the third pump 132, and thus improving the safety of the maintenance process.

[0056] According to an embodiment of the present invention, the generator set is located in a turbine room 200 and includes a steam turbine, a generator, an excitation transformer 170, and a condensing system as described above.

[0057] Specifically, the steam turbine is located on the upper side of the main body 110 and is connected to the high-pressure side cavity within the main body 110. The generator is connected to the steam turbine to convert the mechanical energy generated by the steam turbine into electrical energy. The excitation transformer 170 is connected to the generator to provide a relatively stable power supply for the generator's excitation system. For example... Figure 1 As shown, the side containing the high-pressure side cavity is designated as the first region A, and the side containing the low-pressure side cavity is designated as the second region B. The maintenance device 140, the first pump group 120, and the second pump group 130 are all located in the first region A, while the excitation transformer 170 is located in the second region B. This fully utilizes the internal space of the turbine hall 200, eliminating the need for an additional roof structure and reducing costs. Furthermore, by placing the maintenance device 140, the first pump group 120, and the second pump group 130 in the first region A, and the excitation transformer 170 in the second region B, the generator sets are arranged in a regionalized manner within the turbine hall 200. This reduces the impact on other equipment during later maintenance of the first pump group 120 or the second pump group 130. In summary, this embodiment of the present invention provides a condensing steam system, which has at least the following advantages:

[0058] 1. The first vacuum pump 121 and the second vacuum pump 131 respectively evacuate the high-pressure side cavity and the low-pressure side cavity, which can accelerate the establishment of a vacuum environment inside the condenser when the steam turbine is started, thereby improving production efficiency.

[0059] 2. The first pump group 120 and the second pump group 130 are located on the same side of the dividing line C, and the first pump group 120 and the second pump group 130 are distributed along the first direction X, so that the structure of the condensing system is more concentrated, which facilitates the later maintenance of the first pump group 120 and the second pump group 130. The first pump group 120 and the second pump group 130 can share a set of maintenance equipment 140, which saves space in the turbine hall 200, facilitates the layout of other equipment of the power plant unit, and reduces costs.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate this utility model and are not intended to limit it. It should be pointed out that those skilled in the art can make several improvements and substitutions without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A condensing system provided in a steam turbine building (200), characterized by comprising: The condensing system includes: The main body (110) is provided with a high-pressure side cavity and a low-pressure side cavity that are interconnected. A first pump group (120) includes at least one first vacuum pump (121) which is in communication with the high-pressure side cavity. The second pump group (130) includes at least one second vacuum pump (131) which is in communication with the low-pressure side cavity; Within the same horizontal plane, the high-pressure side cavity and the low-pressure side cavity are distributed along the first direction (X), with the center line between the high-pressure side cavity and the low-pressure side cavity as the dividing line (C), and the first pump group (120) and the second pump group (130) are distributed along the first direction (X); A maintenance device (140) is provided, wherein the maintenance device (140), the first pump group (120), and the second pump group (130) are all located on the same side of the dividing line (C). The maintenance device (140) includes a guide rail (141) and a crane (142). The guide rail (141) extends along the first direction (X) and is located above the first pump group (120) and the second pump group (130). The crane (142) is connected to the guide rail (141) and is capable of moving along the guide rail (141).

2. The condensing system of claim 1, wherein The first pump group (120) includes a first suction pipe (126) and two first vacuum pumps (121). The two first vacuum pumps (121) are a first pump (122) and a second pump (123), respectively. The first pump (122) and the second pump (123) are connected in parallel to the first suction pipe (126). The first pump (122) and the second pump (123) are distributed along a second direction (Y). The second direction (Y) and the first direction (X) are in the same horizontal plane and perpendicular to each other. The second pump group (130) includes a second suction pipe (136) and two second vacuum pumps (131), the two second vacuum pumps (131) being a third pump (132) and a fourth pump (133), the third pump (132) and the fourth pump (133) being connected in parallel to the second suction pipe (136), and the third pump (132) and the fourth pump (133) being distributed along the second direction (Y).

3. The condensing system according to claim 2, characterized in that, The first pump set (120) further includes a first water vapor separator (124) and a first exhaust pipe (125). The first water vapor separator (124) is provided with a first air inlet (1241), a second air inlet (1242) and a first exhaust port (1243). The first air inlet (1241) is connected to and communicates with the first pump (122), and the second air inlet (1242) is connected to and communicates with the second pump (123). The first exhaust pipe (125) is connected to the first exhaust port (1243) to discharge the gas separated in the first water vapor separator (124) to the outside of the turbine room (200).

4. The condensing system according to claim 3, characterized in that, The second pump set (130) further includes a second water vapor separator (134) and a second exhaust pipe (135). The second water vapor separator (134) is provided with a third air inlet (1341), a fourth air inlet (1342), and a second exhaust port (1343). The third air inlet (1341) is connected to and communicates with the third pump (132), and the fourth air inlet (1342) is connected to and communicates with the fourth pump (133). The second exhaust pipe (135) is connected to the second exhaust port (1343) to discharge the gas separated in the second water vapor separator (134) to the outside of the turbine room (200).

5. The condensing system according to claim 4, characterized in that, The condensing system also includes a main exhaust pipe (160), and the first exhaust pipe (125) and the second exhaust pipe (135) are connected in parallel to the main exhaust pipe (160).

6. The condensing system according to claim 2, characterized in that, The first pump (122) and the second pump (123) are spaced apart, and the third pump (132) and the fourth pump (133) are spaced apart. The first pump (122) and the third pump (132) are on the same straight line, and the second pump (123) and the fourth pump (133) are on the same straight line. The orthographic projection of the guide rail (141) onto the mounting surface of the first pump assembly (120) falls on the first pump (122) and the third pump (132).

7. The condensing system according to claim 1, characterized in that, The crane (142) includes a car body (143), a lifting frame (144), and a hook (145). The car body (143) is movably connected to a guide rail. The lifting frame (144) is connected to the car body (143), and the end of the lifting frame (144) away from the car body (143) is movable relative to the car body (143) along a third direction (Z) perpendicular to the first direction (X). The hook (145) is connected to the end of the lifting frame (144) away from the car body (143).

8. A generator set, characterized in that, include: The condensing system according to any one of claims 1 to 7; A steam turbine is located on the upper side of the main body (110) and is connected to the main body (110); A generator, which is connected to the steam turbine; An excitation transformer (170) is connected to the generator. The side containing the high-voltage side cavity is the first region (A), and the side containing the low-voltage side cavity is the second region (B). The maintenance device (140), the first pump group (120), and the second pump group (130) are all located in the first region (A), and the excitation transformer (170) is located in the second region (B).

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