Plant and drainage system and method thereof

Abstract

The invention provides a workshop and a drainage system and method thereof, and relates to the technical field of hydropower station workshops, the drainage system of the workshop comprises a drainage part structure, a valve structure, a leakage water drainage system and an oily water treatment system.The end of the drainage part structure is used for extending to auxiliary equipment of the workshop; the valve structure is arranged on the drainage part structure, the end, away from the auxiliary equipment, of the drainage part structure communicates with the leakage water drainage system and the oily water treatment system, and the valve structure is used for controlling the drainage part structure to be communicated with the leakage water drainage system or the oily water treatment system. The cost of the drainage system of the plant can be effectively reduced, and the equipment utilization rate is increased.

Description

Technical Field

[0001] This invention relates to the field of hydropower plant technology, and more specifically, to a plant and its drainage system and method. Background Technology

[0002] During the operation of a hydropower station, in accordance with relevant design regulations or design guidelines, oily wastewater in the power plant must not be directly discharged. It must be collected in an oily wastewater collection well and treated by an oily wastewater treatment device before being discharged.

[0003] Currently, there are multiple sources of oily wastewater within the hydropower station. Sources identified as oily include turbine oil chamber drain pipes, turbine pits, fixed guide vanes, and top cover drainage pumps. This oily wastewater primarily flows through various drain pipes to the oily wastewater treatment equipment for treatment before discharge. However, the water flowing into the drainage ditch of the corridor layer from auxiliary equipment such as tailrace disc valves and unit oil supply / discharge pipelines cannot be determined to be oily (oily wastewater). Under normal circumstances, this corridor layer drainage ditch does not contain oily wastewater and mainly collects non-oily seepage water from within the powerhouse. However, during maintenance, oil leaks generate oily wastewater that mixes with the seepage water, causing a large amount of originally oil-free seepage water flowing through the corridor layer drainage ditch to the seepage collection well to become contaminated.

[0004] If the leaked water mixed with oily wastewater from the entire plant is also included in the oily wastewater treatment system, multiple sets of oily wastewater treatment devices will be required. This would not only require expanding the plant size and increasing expansion costs, but also result in redundant wastewater treatment equipment configuration and low utilization rate during normal operation of the equipment in the plant, as the oily wastewater content is low. Summary of the Invention

[0005] The problem addressed by this invention is how to effectively reduce the cost of factory drainage systems and improve equipment utilization.

[0006] To address the above problems, the present invention provides a factory building and its drainage system and method.

[0007] In a first aspect, the present invention provides a drainage system for a factory building, including a drainage component structure, a valve structure, a leakage water drainage system, and an oily wastewater treatment system. One end of the drainage component structure extends to auxiliary equipment in the factory building. The valve structure is disposed on the drainage component structure. The end of the drainage component structure away from the auxiliary equipment is connected to the leakage water drainage system and the oily wastewater treatment system, respectively. The valve structure is used to control the drainage component structure to connect to the leakage water drainage system or the oily wastewater treatment system.

[0008] Optionally, the drainage structure includes drainage ditches and flow guides. One end of the plurality of drainage ditches extends to each auxiliary device of the auxiliary equipment, and the other end of the plurality of drainage ditches is connected to one end of the flow guide. The end of the flow guide away from the drainage ditches has a first outlet and a second outlet. The first outlet and the second outlet are respectively connected to the leakage water drainage system and the oily wastewater treatment system. The valve structure is disposed on the flow guide.

[0009] Optionally, the guide member includes a main conveyor, a first branch conveyor, and a second branch conveyor. The other end of the plurality of drainage ditches is connected to one end of the main conveyor. One end of the first branch conveyor and one end of the second branch conveyor are respectively connected to the other end of the main conveyor. The first outlet of the first branch conveyor is connected to the seepage drainage system, and the second outlet of the second branch conveyor is connected to the oily wastewater treatment system.

[0010] Optionally, the valve structure includes a first valve and a second valve, wherein the first valve is disposed on the first branch conveying component and the second valve is disposed on the second branch conveying component.

[0011] Optionally, the valve structure includes a reversing valve having a first interface and two second interfaces that are interconnected. The other end of the main conveyor is connected to the first interface, and the two second interfaces are respectively connected to one end of the first branch conveyor and one end of the second branch conveyor.

[0012] Optionally, the oily wastewater treatment system includes an oily wastewater collection well, an oily wastewater pumping station, and an oily wastewater treatment device connected in sequence, with the end of the drainage component structure away from the auxiliary equipment connected to the oily wastewater collection well.

[0013] Optionally, the leakage drainage system includes a leakage collection well, a leakage pump room, and a drainage pipe structure connected in sequence, with the end of the drainage component structure away from the auxiliary equipment connected to the leakage collection well.

[0014] Optionally, the drainage pipe structure includes a first drainage pipe and a plurality of second drainage pipes, one end of the first drainage pipe being connected to the leakage water pumping station, and one end of the first drainage pipe being connected to the plurality of second drainage pipes respectively.

[0015] Secondly, the present invention provides a factory building, including auxiliary equipment and a drainage system for the factory building as described above.

[0016] Thirdly, the present invention provides a drainage method for a factory building, based on the factory building described above, comprising the following steps: When the auxiliary equipment in the factory is in normal working condition, operate the valve structure to open the drainage structure to the leakage water drainage system, so that the leakage water generated by the auxiliary equipment flows into the leakage water drainage system through the drainage structure. When the auxiliary equipment in the plant is under maintenance, operate the valve structure to open the drainage structure to the oil and wastewater treatment system, so that the leakage water generated by the auxiliary equipment flows into the oil and wastewater treatment system through the drainage structure.

[0017] The beneficial effects of the factory building, its drainage system, and method of the present invention are: By controlling the drainage path through a valve structure, physical separation of seepage water and oily wastewater is achieved. Specifically, during normal operation of the auxiliary equipment, the valve structure allows the drainage system to be opened, preventing seepage water from entering the oily wastewater treatment system and thus reducing its processing load. During maintenance of the auxiliary equipment, the valve structure opens the oily wastewater treatment system, allowing oily wastewater generated during maintenance to enter the system for treatment before discharge. In other words, oily wastewater from auxiliary equipment only enters the oily wastewater treatment system during maintenance. This reduces the number and size of the oily wastewater treatment units, eliminating the need to expand the plant size and lowering costs associated with expansion and equipment investment. Furthermore, the fact that the oily wastewater treatment units only operate during maintenance periods improves their utilization rate. Attached Figure Description

[0018] Figure 1 This is one of the schematic diagrams of the pipeline connection of the factory building in an embodiment of the present invention; Figure 2 This is the second schematic diagram of the pipeline connection of the factory building in an embodiment of the present invention; Figure 3 This is the third schematic diagram of the pipeline connection of the factory building in an embodiment of the present invention; Figure 4 This is a schematic diagram of the floor plan of the drainage system of the factory building in an embodiment of the present invention; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure along section line AA; Figure 6 for Figure 4 A schematic diagram of the cross-sectional structure along section line BB; Figure 7 for Figure 4 A schematic diagram of the cross-sectional structure along the central section line CC; Figure 8 for Figure 4A schematic diagram of the cross-sectional structure along the central section line DD.

[0019] Explanation of reference numerals in the attached figures: 1-Drainage component structure; 11-Drainage ditch; 12-Flow guide component; 121-Main road conveying component; 122-First branch road conveying component; 123-Second branch road conveying component; 2-Valve structure; 21-First valve; 22-Second valve; 23-Reversing valve; 3-Leakage drainage system; 31-Leakage collection well; 32-Leakage pumping station; 33-Drainage pipe structure; 331-First drainage pipe; 332-Second drainage pipe; 4-Oil wastewater treatment system; 41-Oil wastewater collection well; 42-Oil wastewater pumping station; 43-Oil wastewater treatment device; 5-Auxiliary equipment; 51-Auxiliary device. Detailed Implementation

[0020] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Although some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0021] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this invention are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0022] It should be noted that the terms "a" and "a plurality of" used in this invention are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0023] like Figure 1As shown in the figure, an embodiment of the present invention provides a drainage system for a factory, including a drainage component structure 1, a valve structure 2, a leakage water drainage system 3, and an oily wastewater treatment system 4. One end of the drainage component structure 1 is used to extend to an auxiliary device 5 in the factory. The valve structure 2 is disposed on the drainage component structure 1. The end of the drainage component structure 1 away from the auxiliary device 5 is connected to the leakage water drainage system 3 and the oily wastewater treatment system 4, respectively. The valve structure 2 is used to control the drainage component structure 1 to conduct the leakage water drainage system 3 or the oily wastewater treatment system 4.

[0024] Specifically, the drainage structure 1 can be a network of pipes composed of corrosion-resistant PVC, steel pipes, or drainage ditches (or troughs). Its inlet end can be located near the auxiliary equipment 5 of the plant (such as tailwater disc valves, unit oil supply and discharge pipelines) to collect the leakage water or oily wastewater generated by these auxiliary devices 51. The outlet end of the drainage structure 1 can be connected to the leakage water drainage system 3 and the oily wastewater treatment system 4 respectively through tee joints or branch pipes.

[0025] During normal operation of auxiliary equipment 5, valve structure 2 switches to connect to the leakage drainage system 3; during maintenance of auxiliary equipment 5, valve structure 2 switches to connect to the oily wastewater treatment system 4. Valve structure 2 can be automatically switched via a PLC control system or manually operated.

[0026] In this embodiment, the drainage path is controlled by valve structure 2, thereby achieving physical separation of leaked water and oily wastewater.

[0027] Specifically, when the auxiliary equipment 5 of the plant is operating normally, the valve structure 2 enables the drainage component structure 1 to connect to the leakage water drainage system 3. The leakage water generated by the auxiliary equipment 5 can enter the leakage water drainage system 3 through the drainage component structure 1, thus preventing oil-free water from entering the oily wastewater treatment system 4 and reducing the treatment load of the oily wastewater treatment system 4.

[0028] When auxiliary equipment 5 is under maintenance, the drain structure 1 is connected to the oily wastewater treatment system 4 through the valve structure 2. The oily wastewater generated by auxiliary equipment 5 during maintenance can enter the oily wastewater treatment system 4 through the drain structure 1. After being treated by the oily wastewater treatment system 4, the oily wastewater is discharged. In other words, only the oily wastewater generated by auxiliary equipment 5 during maintenance enters the oily wastewater treatment system 4. The number and scale of oily wastewater treatment devices 43 in the oily wastewater treatment system 4 can be reduced. This not only eliminates the need to expand the plant size, reducing the costs of plant expansion and equipment investment, but also improves the equipment utilization rate of oily wastewater treatment devices 43 because the oily wastewater treatment devices 43 only work during the maintenance period of auxiliary equipment 5.

[0029] The size of the oily wastewater collection well 41 can be designed based on the amount of wastewater during the maintenance phase, rather than the total amount of leakage from the entire plant. Therefore, the volume of the collection well can be reduced by about 50%, saving plant space.

[0030] The power and flow requirements of the oily wastewater pumping station 42 are reduced because it only needs to handle intermittent oily wastewater, rather than continuous large-scale leakage, thereby reducing plant power consumption by about 30%.

[0031] Optionally, combined Figure 2 , Figure 4 and Figure 6 As shown, the drainage structure 1 includes drainage ditches 11 and flow guides 12. One end of each of the drainage ditches 11 extends to each of the auxiliary devices 51 of the auxiliary equipment 5. The other end of each of the drainage ditches 11 is connected to one end of the flow guide 12. The end of the flow guide 12 away from the drainage ditches 11 has a first outlet and a second outlet. The first outlet and the second outlet are respectively connected to the leakage water drainage system 3 and the oily wastewater treatment system 4. The valve structure 2 is disposed on the flow guide 12.

[0032] Specifically, the auxiliary equipment 5 may include multiple auxiliary devices 51, including but not limited to tailrace disc valves of hydropower station equipment, oil supply and discharge pipelines of the unit, and may also include speed governors. The number of drainage ditches 11 may be greater than or equal to the number of auxiliary devices 51. At least one drainage ditch 11 is arranged below or on one side of each auxiliary device 51. The drainage ditch 11 may be in the form of concrete channels, metal channels, or a combination of channels and pipelines. A grating may be installed in the drainage ditch 11 to prevent debris from clogging it. The drainage ditch 11 is arranged with a certain slope to ensure that the water flows by gravity to the guide member 12.

[0033] The flow guide 12 can be arranged in the corridor layer of the factory building. The flow guide 12 can be a main pipe or a main water ditch structure. The main pipe can be made of stainless steel and has a diversion baffle inside. After the water flow from multiple drainage ditches 11 converges into the flow guide 12, it is directed to the leakage water drainage system 3 and the oily wastewater treatment system 4 respectively through the first and second outlets of the flow guide 12 under the control of the valve structure 2.

[0034] The valve structure 2 can be installed between the two ends of the guide member 12, or the guide member 12 can be installed near the end of the leakage water drainage system 3 and the oily wastewater treatment system 4.

[0035] In this optional embodiment, multiple drainage ditches 11 collect drainage from each auxiliary device 51, achieving source separation and avoiding cross-contamination of drainage from different auxiliary devices 51, thus improving the reliability of the drainage system. The flow guide 12 centrally handles the convergence of multiple water flows, simplifying the pipe layout, reducing connection points, and lowering leakage risk and maintenance costs.

[0036] Valve structure 2 is mounted on the flow guide 12, facilitating centralized control and enabling changes to the drainage path of the entire system, thus improving operational efficiency. The diversion design of the flow guide 12 ensures strict separation of leaked water and oily wastewater, reducing the possibility of accidental mixing and optimizing wastewater treatment results.

[0037] Optionally, combined Figure 2 , Figure 3 , Figure 4 As shown, the guide member 12 includes a main conveyor 121, a first branch conveyor 122, and a second branch conveyor 123. The other ends of the plurality of drainage ditches 11 are connected to one end of the main conveyor 121. One end of the first branch conveyor 122 and one end of the second branch conveyor 123 are respectively connected to the other end of the main conveyor 121. The first outlet of the first branch conveyor 122 is connected to the leakage drainage system 3, and the second outlet of the second branch conveyor 123 is connected to the oily wastewater treatment system 4.

[0038] Specifically, the main conveying component 121 can be a main pipe with a large diameter (such as a DN200 steel pipe), which can be installed horizontally under the floor of the factory building and can be used to collect water from all drainage ditches 11.

[0039] The first branch conveyor 122 is a pipe or channel leading to the seepage collection well 31 of the seepage drainage system 3, and the second branch conveyor 123 is a pipe or channel leading to the oily wastewater collection well 41 of the oily wastewater treatment system 4. The first branch conveyor 122 and the second branch conveyor 123 can be connected to the main conveyor 121 via a Y-shaped tee.

[0040] The valve structure 2 can be installed at the connection between the main conveyor 121 and the first branch conveyor 122 and the second branch conveyor 123, or respectively installed on the first branch conveyor 122 and the second branch conveyor 123.

[0041] In this optional embodiment, the main conveyor 121 concentrates the water flow, reducing the number and complexity of pipes, and lowering installation costs and space occupation. The first branch conveyor 122 and the second branch conveyor 123 are clearly and independently separated, ensuring the independence of the two drainage channels for leakage water in normal operation and oily wastewater generated during maintenance of the auxiliary equipment 5, avoiding wastewater mixing caused by pipe crossing, and improving system purity. Through the design of the first branch conveyor 122 and the second branch conveyor 123, the water flow direction to the leakage water drainage system 3 and the oily wastewater treatment system 4 is controllable, adapting to the needs of different operating conditions (normal operation and maintenance), and enhancing the system's flexibility and adaptability.

[0042] Optionally, combined Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, the valve structure 2 includes a first valve 21 and a second valve 22. The first valve 21 is disposed on the first branch conveyor 122, and the second valve 22 is disposed on the second branch conveyor 123.

[0043] Specifically, the first valve 21 and the second valve 22 can be electric butterfly valves or ball valves, and are respectively installed on the first branch conveyor 122 and the second branch conveyor 123.

[0044] The first valve 21 and the second valve 22 can both be long-handled valves that can be manually operated to open and close, or both can be electrically operated valves.

[0045] When both valves are electrically controlled, they are connected to the control cabinet via cables and controlled by buttons or automatic signals. An oil detection device can be installed on the main conveyor 121 to detect the presence and content of oil in the fluid within the main conveyor 121, which can be used as one of the criteria for determining whether the auxiliary device 51 is leaking oil due to maintenance. The electrically controlled valves enable remote control, improving operational safety and response speed, and are particularly suitable for large factories.

[0046] Oil spill detectors, such as oil spill sensors, can employ various methods including: ultraviolet fluorescence sensors (detecting oil spills by exciting the fluorescence properties of oil molecules, capable of identifying various oils such as marine diesel and aviation fuel, with a detection range of 0.5-10 meters from the water surface and a sensitivity down to 1 micrometer for oil layers); optical sensors (using optical monitoring technology (such as the 90° scattering light method) to determine oil concentration by measuring the light scattering intensity of suspended particles in the water, supporting self-cleaning functions and adapting to complex water quality environments); and ultrasonic sensors (calculating oil layer thickness by emitting ultrasonic waves and receiving reflected signals, supporting non-contact measurement and unaffected by the properties of the oil).

[0047] Operating procedure: During normal operation, the first valve 21 is open and the second valve 22 is closed, allowing water to flow to the leakage drainage system 3; during maintenance, the first valve 21 is closed and the second valve 22 is open, allowing water to flow to the oily wastewater treatment system 4. Valve status can be displayed via indicator lights.

[0048] In this optional embodiment, two independent valves are used to achieve dual-safety control. If one valve fails, the other valve can still work, thus improving system reliability.

[0049] The first valve 21 and the second valve 22 can be respectively installed on the first branch conveyor 122 and the second branch conveyor 123, facilitating individual maintenance and replacement, reducing downtime, and lowering maintenance costs. The combination of opening and closing the first valve 21 and the second valve 22 ensures that water flow is directed to only one system, avoiding cross-contamination caused by simultaneous flow and guaranteeing drainage quality.

[0050] Optionally, unlike the above embodiments, in this embodiment, the valve structure 2 may include a reversing valve 23, combined with... Figure 3 As shown, the reversing valve 23 has a first interface and two second interfaces that are interconnected. The other end of the main conveyor 121 is connected to the first interface, and the two second interfaces are respectively connected to one end of the first branch conveyor 122 and one end of the second branch conveyor 123.

[0051] Specifically, the directional control valve 23 is a three-way ball valve or a solenoid directional control valve. The first port of the directional control valve 23 is connected to the main conveyor 121, and the two second ports are connected to the first branch conveyor 122 and the second branch conveyor 123, respectively. Therefore, the directional control valve 23 can be positioned between the main conveyor 121 and the inlets of the first and second branch conveyors 122 and 123, respectively. The directional control valve 23 can be operated manually or driven by an electric actuator.

[0052] Operating procedure: When auxiliary equipment 5 (or auxiliary device 51) is operating normally, the reversing valve 23 switches to the first branch conveyor 122, allowing leakage water generated by auxiliary device 51 or other locations in the plant to be sequentially transported to the leakage water drainage system 3 via drainage ditch 11, main conveyor 121, and first branch conveyor 122. During maintenance, it switches to the second branch conveyor 123, allowing oily wastewater generated by auxiliary device 51 to be sequentially transported to the oily wastewater treatment system 4 via drainage ditch 11, main conveyor 121, and second branch conveyor 123. The internal channel of the reversing valve 23 is designed so that only one of the second ports can be opened at a time to prevent crossflow.

[0053] In this optional embodiment, valve structure 2 adopts a reversing valve 23, which allows operators to switch valves in only one position, reducing the number of valves and pipeline connection points, and lowering the risk of leakage and installation costs.

[0054] The switching action is fast, requiring only one operation to change the direction of water flow, which improves the system response efficiency and is suitable for scenarios with frequent switching.

[0055] The mechanical interlock function of the reversing valve 23 ensures that water flow will not enter the two systems at the same time, thus enhancing system safety.

[0056] Optionally, combined Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 As shown, the oily wastewater treatment system 4 includes an oily wastewater collection well 41, an oily wastewater pumping station 42, and an oily wastewater treatment device 43 connected in sequence. The end of the drainage component structure 1 away from the auxiliary equipment 5 is connected to the oily wastewater collection well 41.

[0057] Specifically, the oily wastewater collection well 41 can be an underground concrete structure, and its volume can be designed according to the maximum wastewater volume during the maintenance phase. A liquid level sensor and an oil-water separation grid can be installed inside.

[0058] The oily wastewater pumping station 42 may include a first pumping station and multiple first drainage pumps installed in the first pumping station. The first drainage pumps are submersible pumps located in the oily wastewater collection well 41. Their power is selected according to the wastewater lifting height and flow rate. The pump inlet of the first drainage pump is connected to the oily wastewater collection well 41, and the pump outlet of the first drainage pump is connected to the oily wastewater treatment device 43. The first drainage pumps are used to transport the oily wastewater from the oily wastewater collection well 41 to the oily wastewater treatment device 43 for oil pollution treatment by pressurization.

[0059] The oily wastewater treatment device 43 can use a centrifugal oil-water separator, gravity separation or membrane filtration technology, and discharge the treated water that meets the relevant requirements.

[0060] In this optional embodiment, the oily wastewater collection well 41 serves as a buffer container, balancing the intermittent wastewater flow during the maintenance phase, preventing frequent start-stop of the first drainage pump, and extending the equipment lifespan.

[0061] A high-power first drainage pump can be installed in the oily wastewater pumping station 42 to ensure timely delivery of wastewater.

[0062] The oily wastewater treatment device 43 only treats oily wastewater, has high treatment efficiency, reduces the amount of chemical reagents used, and lowers operating costs.

[0063] Optionally, combined Figure 2 , Figures 3 to 7 As shown, the leakage water drainage system 3 includes a leakage water collection well 31, a leakage water pump room 32, and a drainage pipe structure 33 connected in sequence. The end of the drainage component structure 1 away from the auxiliary equipment 5 is connected to the leakage water collection well 31.

[0064] Specifically, the seepage collection well 31 can be a large underground water tank to collect oil-free seepage water from the entire plant, and can be equipped with a filter screen and a liquid level controller.

[0065] The leakage water pumping station 32 may include a second pumping station and multiple second drainage pumps installed in the second pumping station. The second drainage pumps are submersible pumps located in the oily sewage collection well 41. Multiple centrifugal pumps are installed in the second pumping station and automatically start and stop according to the liquid level to pressurize and pump the leakage water to the drainage pipe structure 33.

[0066] In this optional embodiment, the seepage collection well 31 centrally collects oil-free water, avoiding oil pollution, simplifying subsequent treatment processes, and reducing treatment costs. The seepage pump house 32 adopts a multi-pump configuration, which improves drainage reliability, ensures the plant remains dry, and prevents internal flooding.

[0067] The drainage pipe structure 33 allows clean water to be discharged directly or reused, realizing water resource recycling, which is both environmentally friendly and economical.

[0068] Because the oil and wastewater are separated, the water quality treated by the leakage system is stable, reducing the risk of corrosion of the second drainage pump and drainage pipe structure 33 and extending the equipment life.

[0069] Optionally, combined Figures 4 to 8 As shown, the drainage pipe structure 33 includes a first drainage pipe 331 and a plurality of second drainage pipes 332. One end of the first drainage pipe 331 is connected to the leakage water pump room 32, and one end of the first drainage pipe 331 is connected to the plurality of second drainage pipes 332 respectively.

[0070] Specifically, the first drainage pipe 331 can be a main pipe with a larger diameter, which is led out from the leakage water pump house 32 and arranged along the outer wall of the factory building.

[0071] Multiple second drain pipes 332 can be branch pipes, with one end connected to the first drain pipe 331 and the other end leading to different discharge points (such as tailwater channels or recycling tanks). Each second drain pipe 332 is equipped with a valve to control the flow rate.

[0072] Multiple second drainage pipes 332 can be arranged around the leakage pump house 32, so that the leakage can be discharged from the leakage pump house 32 in different directions, thereby improving the drainage effect.

[0073] In this optional embodiment, the first drain pipe 331 provides centralized delivery, reducing the total pipe length and friction loss, and improving drainage efficiency. Multiple second drain pipes 332 allow for flexible discharge, adapting to terrain and environmental requirements, avoiding congestion at a single discharge point, and increasing system redundancy. If one second drain pipe 332 fails, the others can still operate, further improving the reliability of leak drainage.

[0074] The factory's drainage system also includes a top cover pressure relief drainage main pipe and a tailwater pipe. For the first device in the factory that does not generate oily wastewater, such as the volute elastic pad drainage pipe or the air replenishment device drainage pipe, the water flow generated by the first device, such as leakage water, can be discharged outside the factory through the top cover pressure relief drainage main pipe and the tailwater pipe.

[0075] The plant's drainage system also includes a third drainage pipe and a fourth drainage pipe. For second devices in the plant that are found to contain oil, such as turbine oil chambers, turbine pits, fixed guide vanes, and top cover drainage pumps, the water flow generated by the second device, such as oily wastewater, can be transported to the oily wastewater collection well 41 through the third drainage pipe and the fourth drainage pipe, respectively. After being pressurized by the oily wastewater pumping station, it is pumped to the oily wastewater treatment device 43 for wastewater treatment. The treated water is discharged after meeting the standards.

[0076] An embodiment of the present invention provides a factory building, including auxiliary equipment 5 and a drainage system for the factory building as described in the above embodiment.

[0077] The plant in this embodiment also includes main equipment, such as water turbines, water turbine generators, and main transformers.

[0078] In addition, the main equipment can be equipment from a hydropower station, or equipment from other non-hydropower station fields. Any equipment that can generate oily wastewater during the maintenance phase is applicable to this technical solution.

[0079] In this embodiment, the powerhouse may include the main powerhouse of the hydropower station, which houses the main equipment such as turbines and generators, as well as auxiliary equipment 5 (such as tailrace disc valves and unit oil supply and discharge pipelines). The drainage system is integrated into the foundation and floors of the powerhouse.

[0080] Auxiliary equipment 5 is located on different floors of the factory building, and drainage ditch 11 and flow guide 12 are arranged along the equipment foundation to ensure that there are no dead corners in drainage collection.

[0081] Drainage structure 1 can be embedded in the floor. Leakage drainage system 3 and oily wastewater treatment system 4 can be located on the ground floor of the factory or outdoors.

[0082] The beneficial effects of the factory building in this embodiment compared to the prior art are the same as those of the drainage system of the factory building described above, and will not be repeated here.

[0083] The present invention provides a drainage method for a factory building, based on the factory building described in the above embodiments, and includes the following steps: S1. When the auxiliary equipment 5 of the factory is in normal working condition, operate the valve structure 2 to make the drainage component structure 1 open the leakage water drainage system 3, so that the leakage water generated by the auxiliary equipment 5 flows into the leakage water drainage system 3 through the drainage structure. During normal operation: When auxiliary equipment 5 (such as tailrace disc valve) is running normally, the operator switches valve structure 2 to the leakage drainage system 3 via control panel or manually. For example, opening the first valve 21 or switching the reversing valve 23 to the first branch conveyor 122. Leakage water flows sequentially through drainage ditch 11, main conveyor 121 of guide 12, and first branch conveyor 122 into leakage collection well 31, and is then pumped by leakage pump house 32 to drainage pipe structure 33 for discharge.

[0084] S2. When the auxiliary equipment 5 of the plant is under maintenance, operate the valve structure 2 to make the drainage structure 1 open the oil and wastewater treatment system 4, so that the leakage water generated by the auxiliary equipment 5 flows into the oil and wastewater treatment system 4 through the drainage structure.

[0085] During maintenance: When auxiliary equipment 5 enters the maintenance phase (such as changing engine oil or inspecting pipelines), the operator switches valve structure 2 to connect the oily wastewater treatment system 4. For example, closing the first valve 21, opening the second valve 22, or switching the reversing valve 23 to the second branch conveyor 123. Potentially oily wastewater flows through the drainage ditch 11, the main conveyor 121 of the guide 12, and the second branch conveyor 123 into the oily wastewater collection well 41, and is then sent by the oily wastewater pump room 42 to the oily wastewater treatment device 43 for treatment, and discharged after meeting standards.

[0086] Control method: The operation of valve structure 2 can be automatically executed based on the program of the PLC system. For example, when the maintenance mode is started, the PLC system automatically switches the valve; or it can be manually operated by the operator according to the maintenance plan.

[0087] By dynamically switching the drainage path according to the status of auxiliary equipment 5, the independent transport of oily wastewater and leakage water is ensured, which significantly reduces the treatment volume of oily wastewater treatment system 4 and lowers the treatment cost.

[0088] The method is simple and easy to implement, reducing the difficulty of implementation and manpower requirements. It improves wastewater treatment efficiency, avoids pollution of oil-free water, and reduces environmental risks. It enables energy-saving operation of the plant, as the oil-water treatment device 43 only starts when needed, reducing plant power consumption and improving overall energy efficiency.

[0089] The drainage method of the factory building in this embodiment has the same beneficial effects as the factory building described above compared to the prior art, and will not be repeated here.

[0090] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A drainage system for a factory building, characterized in that, The system includes a drainage structure (1), a valve structure (2), a leakage water drainage system (3), and an oily wastewater treatment system (4). One end of the drainage structure (1) is used to extend to the auxiliary equipment (5) of the plant. The valve structure (2) is installed on the drainage structure (1). The end of the drainage structure (1) away from the auxiliary equipment (5) is connected to the leakage water drainage system (3) and the oily wastewater treatment system (4) respectively. The valve structure (2) is used to control the drainage structure (1) to connect the leakage water drainage system (3) or the oily wastewater treatment system (4).

2. The drainage system of the factory building according to claim 1, characterized in that, The drainage structure (1) includes a drainage ditch (11) and a flow guide (12). One end of the plurality of drainage ditches (11) is used to extend to each auxiliary device (51) of the auxiliary equipment (5). The other end of the plurality of drainage ditches (11) is connected to one end of the flow guide (12). The end of the flow guide (12) away from the drainage ditch (11) has a first outlet and a second outlet. The first outlet and the second outlet are respectively connected to the leakage water drainage system (3) and the oily wastewater treatment system (4). The valve structure (2) is disposed on the flow guide (12).

3. The drainage system of the factory building according to claim 2, characterized in that, The guide component (12) includes a main road conveyor (121), a first branch road conveyor (122), and a second branch road conveyor (123). The other end of the plurality of drainage ditches (11) is connected to one end of the main road conveyor (121). One end of the first branch road conveyor (122) and one end of the second branch road conveyor (123) are respectively connected to the other end of the main road conveyor (121). The first outlet of the first branch road conveyor (122) is connected to the leakage drainage system (3), and the second outlet of the second branch road conveyor (123) is connected to the oily wastewater treatment system (4).

4. The drainage system of the factory building according to claim 3, characterized in that, The valve structure (2) includes a first valve (21) and a second valve (22), wherein the first valve (21) is disposed on the first branch conveyor (122) and the second valve (22) is disposed on the second branch conveyor (123).

5. The drainage system of the factory building according to claim 3, characterized in that, The valve structure (2) includes a reversing valve (23), which has a first interface and two second interfaces that are interconnected. The other end of the main conveyor (121) is connected to the first interface, and the two second interfaces are respectively connected to one end of the first branch conveyor (122) and one end of the second branch conveyor (123).

6. The drainage system of the factory building according to claim 1, characterized in that, The oily wastewater treatment system (4) includes an oily wastewater collection well (41), an oily wastewater pump room (42), and an oily wastewater treatment device (43) connected in sequence. The end of the drainage component structure (1) away from the auxiliary equipment (5) is connected to the oily wastewater collection well (41).

7. The drainage system of the factory building according to claim 1, characterized in that, The leakage drainage system (3) includes a leakage collection well (31), a leakage pump room (32) and a drainage pipe structure (33) connected in sequence. The end of the drainage component structure (1) away from the auxiliary equipment (5) is connected to the leakage collection well (31).

8. The drainage system of the factory building according to claim 7, characterized in that, The drainage pipe structure (33) includes a first drainage pipe (331) and a plurality of second drainage pipes (332). One end of the first drainage pipe (331) is connected to the leakage pump room (32), and one end of the first drainage pipe (331) is connected to the plurality of second drainage pipes (332) respectively.

9. A factory building, characterized in that, Includes auxiliary equipment (5) and a drainage system for the plant as described in any one of claims 1 to 8.

10. A drainage method for a factory building, based on the factory building as described in claim 9, comprising the following steps: When the auxiliary equipment (5) of the factory is in normal working condition, operate the valve structure (2) to make the drainage structure (1) open the leakage water drainage system (3), so that the leakage water generated by the auxiliary equipment (5) flows into the leakage water drainage system (3) through the drainage structure; When the auxiliary equipment (5) of the plant is under maintenance, operate the valve structure (2) to make the drainage structure (1) open the oily wastewater treatment system (4), so that the leakage water generated by the auxiliary equipment (5) flows into the oily wastewater treatment system (4) through the drainage structure.

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