Transformer emergency oil pool system

Abstract

The present invention provides a transformer accident oil pool system, including an accident oil pool, an oil-water buffer tank and an oil-water separation device. An oil-water feed pump is arranged on the oil-water buffer tank, and the oil-water feed pump is connected to the accident oil pool. A debris retention filter frame is arranged in the oil-water buffer tank. The outlet of the oil-water feed pump extends into the debris retention filter frame. An oil-water discharge pump is also arranged on the oil-water buffer tank, the feed end of the oil-water separation device is connected to the outlet of the oil-water discharge pump, and the water outlet is connected to a wastewater storage tank, a wastewater circulation pump is arranged on the wastewater storage tank, and the outlet of the wastewater circulation pump is connected to the oil-water buffer tank. The low-oil-content wastewater treated by the oil-water separation device is transported back to the oil-water buffer tank by the wastewater circulation pump, and the dust, sand, animal and plant carcasses and other debris trapped in the debris retention filter frame are circulated by the low-oil-content wastewater to reduce the amount of transformer oil attached to the debris, so as to achieve harmless disposal of solid waste.

Description

Technical Field

[0001] The invention belongs to the technical field of safe operation of transformer substations, and in particular relates to a transformer accident oil pool system. Background Art

[0002] According to GB50060-2008 "3-110kV High Voltage Distribution Equipment Related Specifications", when the oil volume of a single outdoor electrical equipment is more than 1000kg, oil storage or oil blocking facilities should be installed. Specifically, facilities should be installed to drain the oil to a safe place. If this cannot meet the requirements, oil storage or oil blocking facilities that can accommodate 100% of the oil volume should be installed.

[0003] Most of the existing transformer accident oil pools are set up in the open air, especially in the northern areas close to the desert, where dust, sand, and animal and plant carcasses and other debris may fall into the transformer accident oil pool. When the water level or oil level in the transformer accident oil pool exceeds the safety threshold during inspection and maintenance or in the rainy season, the transformer accident oil pool needs to be drained or drained. Whether it is draining water or draining oil, oil-water separation is required. In the prior art, for example, the Chinese utility model patent with patent number 200920170656.2 discloses an oil-water separation device, including a de-mixing oil-water separator, a separation fine filter, and an acid removal regenerator arranged in sequence. For example, the Chinese utility model patent with patent number 201720095536.5 discloses an oil-water separator and an oil-water separation system. However, the above-mentioned oil-water separation device (system) can only achieve oil-water separation, and in the process of treating waste oil or wastewater in the transformer accident oil pool, part of the waste oil is adsorbed on debris such as dust, sand, and animal and plant carcasses, which is difficult to treat. If it is dumped directly in the wild, it will easily cause environmental pollution. If it is disposed of as solid waste, the processing cost will increase and harmless disposal cannot be achieved. Summary of the invention

[0004] In view of this, the present invention provides a transformer accident oil pool system to solve the technical problem in the prior art that waste oil partially adsorbed on debris such as dust, sand, and dead animals and plants is difficult to treat during the treatment of wastewater or waste oil in the transformer accident oil pool.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A transformer accident oil pool system, comprising:

[0007] Accident oil pool;

[0008] An oil-water buffer tank, wherein an oil-water feed pump is arranged on the oil-water buffer tank, the inlet of the oil-water feed pump is connected to the accident oil pool, and the outlet is connected to the oil-water buffer tank; a debris retention filter frame is arranged in the oil-water buffer tank, and the debris retention filter frame is a frame body with filter holes opened on all sides, and is suspended in the oil-water buffer tank; the outlet of the oil-water feed pump extends into the debris retention filter frame; an oil-water discharge pump is also arranged on the oil-water buffer tank, and the inlet of the oil-water discharge pump is connected to the oil-water buffer tank; and

[0009] An oil-water separation device for separating wastewater and waste oil, wherein the feed end of the oil-water separation device is connected to the outlet of the oil-water discharge pump, the outlet end is connected to a wastewater storage tank, a wastewater circulation pump is arranged on the wastewater storage tank, the inlet of the wastewater circulation pump is connected to the wastewater storage tank, and the outlet is connected to the oil-water buffer tank.

[0010] Preferably, the transformer accident oil pool system also includes an oil-water filter, the feed end of the oil-water filter is connected to the outlet of the oil-water discharge pump, and the discharge end is connected to the feed end of the oil-water separation device; an oil absorption filter element is arranged in the oil-water filter.

[0011] Preferably, the outlet end of the wastewater circulation pump is also connected to a make-up water heating heat exchanger, and the discharge end of the make-up water heating heat exchanger is connected to the oil-water buffer tank; the outlet end of the oil-water discharge pump is connected to an outlet water cooling heat exchanger, and the discharge end of the outlet water cooling heat exchanger is connected to the oil-water filter.

[0012] Preferably, a first aeration pipe is further provided on the oil-water buffer tank, and an outlet of the first aeration pipe extends into the debris retention filter frame.

[0013] Preferably, an anti-clogging protrusion is provided on the inner wall of the debris retention filter frame.

[0014] Preferably, the oil-water separation device comprises an oil-water aeration tank and an oil-water separation pipe, a second aeration pipe and a water supply pipe are arranged at the bottom of the oil-water aeration tank, and an oil-water overflow pipe is arranged at the top; the upper feed end of the oil-water separation pipe is connected to the oil-water overflow pipe.

[0015] Preferably, the oil-water separation device also includes a low-level circulating water tank, on which a circulating water feed pipe and a circulating water pump are provided, the circulating water feed pipe is connected to the bottom discharge port of the oil-water separation pipe, the inlet of the circulating water pump is connected to the low-level circulating water tank, and the outlet is connected to the water make-up pipe.

[0016] Preferably, the oil-water aeration tank comprises an aeration part, an overflow neck and a pressure relief part which are sequentially connected from bottom to top, the diameter of the overflow neck is smaller than the diameters of the aeration part and the pressure relief part, and the oil-water overflow pipe is arranged on the overflow neck.

[0017] Preferably, a second liquid level sensor is provided on the oil-water separation pipe, a liquid level control valve is provided on the circulating water feed pipe, a second water replenishment control valve is provided on the water replenishment pipe, and a second aeration control valve is provided on the second aeration pipe; the oil-water separation device also includes a second microcontroller, the second microcontroller has a signal input end and a signal output end, the signal input end is electrically connected to the second liquid level sensor, and the signal output end is electrically connected to the liquid level control valve, the second water replenishment control valve and the second aeration control valve.

[0018] Preferably, the oil-water buffer tank is provided with a first liquid level sensor for monitoring the liquid level in the oil-water buffer tank, the outlet end of the wastewater circulation pump is provided with a first water replenishment control valve, the first aeration pipe is provided with a first aeration control valve, the outlet end of the oil-water discharge pump is provided with a drainage control valve, and the oil-water buffer tank is also provided with a first microcontroller, the signal input end of the first microcontroller is electrically connected to the first liquid level sensor, and the signal output end is electrically connected to the first water replenishment control valve, the first aeration control valve and the drainage control valve.

[0019] It can be seen from the above technical scheme that the present invention provides a transformer accident oil pool system, and its beneficial effects are: an accident oil pool, an oil-water buffer tank and an oil-water separation device are sequentially arranged, and the oil-water mixture in the accident oil pool is sent into the debris retention filter frame together with dust, sand, and animal and plant carcasses and other debris through the oil-water feed pump, and the dust, sand, and animal and plant carcasses and other debris are trapped in the debris retention filter frame, and the oil-water mixture gradually fills the oil-water buffer tank. The oil-water mixture in the oil-water buffer tank is pumped into the oil-water separation device by the oil-water discharge pump, and waste oil and waste water are separated in the oil-water separation device to reduce the oil content in the waste water. The low-oil content wastewater is transported back to the oil-water buffer tank by the wastewater circulation pump, and the low-oil content wastewater is circulated to soak the dust, sand, dead animals and plants and other debris trapped in the debris retention filter frame, so that the transformer oil attached to the debris is extracted into the water, reducing the amount of transformer oil attached to the debris, and achieving harmless disposal of solid waste such as dust, sand, dead animals and plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the pipeline flow chart of the transformer emergency oil pool system.

[0021] Figure 2 It is a pipeline flow chart of the oil-water separation device.

[0022] In the figure: transformer accident oil pool system 10, accident oil pool 100, oil-water buffer tank 200, oil-water feed pump 210, debris retention filter frame 220, anti-clogging protrusion 221, oil-water discharge pump 230, outlet water cooling heat exchanger 231, first aeration pipe 240, oil-water separation device 300, wastewater storage tank 310, wastewater circulation pump 320, water supply heating heat exchanger 321, oil-water aeration tank 330, aeration part 3301, overflow neck 3302, pressure release part 3303, second aeration pipe 331, water supply pipe 332 , oil-water separation pipe 340, oil-water overflow pipe 350, low-level circulating water tank 360, circulating water feed pipe 361, circulating water pump 362, oil-water filter 400, oil absorption filter element 410, second microcontroller 500, second liquid level sensor 501, liquid level control valve 502, second water replenishment control valve 503, second aeration control valve 504, oil discharge control valve 505, first microcontroller 600, first liquid level sensor 601, first water replenishment control valve 602, first aeration control valve 603, and discharge control valve 604. DETAILED DESCRIPTION

[0023] The technical scheme and technical effects of the present invention are further elaborated in detail below in conjunction with the accompanying drawings of the present invention.

[0024] Please see Figure 1 In a specific implementation, a transformer accident oil pool system 10 includes an accident oil pool 100, an oil-water buffer tank 200 and an oil-water separation device 300.

[0025] The accident oil pool 100 is arranged below the transformer in the substation and is used to receive transformer oil leaked due to maintenance, failure, etc.

[0026] An oil-water feed pump 210 is provided on the oil-water buffer tank 200, the inlet of the oil-water feed pump 210 is connected to the accident oil pool 100, and the outlet is connected to the oil-water buffer tank 200. A debris retention filter frame 220 is provided in the oil-water buffer tank 200, and the debris retention filter frame 220 is a frame with filter holes opened around it, and is suspended in the oil-water buffer tank 200. The outlet of the oil-water feed pump 210 extends into the debris retention filter frame 220. An oil-water discharge pump 230 is also provided on the oil-water buffer tank 200, and the inlet of the oil-water discharge pump 230 is connected to the oil-water buffer tank 200.

[0027] The oil-water separation device 300 is used to separate wastewater and waste oil. The feed end of the oil-water separation device 300 is connected to the outlet of the oil-water discharge pump 230, and the outlet end is connected to the wastewater storage tank 310. A wastewater circulation pump 320 is arranged on the wastewater storage tank 310. The inlet of the wastewater circulation pump 320 is connected to the wastewater storage tank 310, and the outlet is connected to the oil-water buffer tank 200.

[0028] An accident oil pool 100, an oil-water buffer tank 200 and an oil-water separation device 300 are sequentially arranged, and the oil-water mixture in the accident oil pool 100 is sent into the debris retention filter frame 220 together with dust, sand, and animal and plant carcasses and other debris through the oil-water feed pump 210. Dust, sand, and animal and plant carcasses and other debris are retained in the debris retention filter frame 220, and the oil-water mixture gradually fills the oil-water buffer tank 200. The oil-water mixture in the oil-water buffer tank 200 is pumped into the oil-water separation device 300 by the oil-water discharge pump 230, and waste oil and waste water are separated in the oil-water separation device 300 to reduce the oil content in the waste water. For example, the oil-water separation device 300 may be a coalescing deoiler or a coalescing dehydrator. The low-oil content wastewater is transported back to the oil-water buffer tank 200 by the wastewater circulation pump 320, and the dust, sand, dead animals and plants and other debris trapped in the debris retention filter frame 220 are soaked in the low-oil content wastewater circulation, so that the transformer oil attached to the debris is soaked into the water, reducing the amount of transformer oil attached to the debris, and achieving harmless disposal of solid waste such as dust, sand, dead animals and plants.

[0029] In one embodiment, in order to improve the oil-water separation efficiency, especially when the accident oil pool 100 receives a large amount of transformer oil, the oil-water separation is accelerated and the oil-water separation effect is improved, the transformer accident oil pool system 10 further includes an oil-water filter 400, the feed end of the oil-water filter 400 is connected to the outlet of the oil-water discharge pump 230, and the discharge end is connected to the feed end of the oil-water separation device 300. An oil suction filter element 410 is arranged in the oil-water filter 400. The oil-water mixture pumped out by the oil-water discharge pump 230 first passes through the oil-water filter 400 to achieve preliminary separation of oil and water. When the oil content in the oil-water mixture is small, generally, the oil-water mixture can be directly transported into the oil-water separation device 300 through the cross-line of the oil-water filter 400 without passing through the oil-water filter 400.

[0030] In a preferred embodiment, in order to improve the efficiency of extracting transformer oil from debris such as dust, sand, and dead animals and plants, improve the oil-water separation efficiency in the oil-water mixture, and reduce the transformer oil content in the water as much as possible, the outlet end of the wastewater circulation pump 320 is also connected to a water replenishment heating heat exchanger 321, and the discharge end of the water replenishment heating heat exchanger 321 is connected to the oil-water buffer tank 200. The outlet end of the oil-water discharge pump 230 is connected to an outlet water cooling heat exchanger 231, and the discharge end of the outlet water cooling heat exchanger 231 is connected to the oil-water filter 400. The low-oil wastewater entering the oil-water buffer tank 200 through the wastewater circulation pump 320 is first heated to 35°C to 50°C by the water replenishment heating heat exchanger 321 to improve the leaching rate of the transformer oil attached to debris such as dust, sand, and dead animals and plants by the low-oil wastewater, and improve the leaching efficiency. The outlet water of the oil-water buffer tank 200 is cooled to below 20° C. by the outlet water cooling heat exchanger 231 so that the transformer oil is precipitated from the oil-water mixture, thereby improving the oil-water separation efficiency.

[0031] Furthermore, the oil-water buffer tank 200 is also provided with a first aeration pipe 240, and the outlet of the first aeration pipe 240 extends into the debris retention filter frame 220. Air is blown into the debris retention filter frame 220 through the first aeration pipe 240, which, on the one hand, disturbs the dust, sand, and animal and plant carcasses and other debris in the debris retention filter frame 220, so that they are fully in contact with the water in the oil-water buffer tank 200, so that the transformer oil attached to the dust, sand, and animal and plant carcasses and other debris is leached into the water. On the other hand, through aeration, the transformer oil in a partially emulsified state contained in the water is precipitated, thereby improving the oil-water separation efficiency.

[0032] In another embodiment, an anti-clogging protrusion 221 is provided on the inner wall of the debris retaining filter frame 220 to prevent sheet-like debris from adhering to the inner surface of the debris retaining filter frame 220 and causing the debris retaining filter frame 220 to be blocked.

[0033] Please also see Figure 2 In a preferred embodiment, in order to improve the treatment effect of the oil-water mixture in the accident oil pool 100, further recover the waste oil in the sewage, and reduce the water content in the waste oil, the oil-water separation device 300 includes an oil-water aeration tank 330 and an oil-water separation pipe 340. The bottom of the oil-water aeration tank 330 is provided with a second aeration pipe 331 and a water supply pipe 332, and the upper part is provided with an oil-water overflow pipe 350. The upper end feed port of the oil-water separation pipe 340 is connected to the oil-water overflow pipe 350.

[0034] When the oil-water mixture in the accident oil pool 100 is subjected to the oil-water separation operation, the oil-water mixture is firstly pumped into the oil-water aeration tank 330 through the oil-water discharge pump 230, and the liquid level is controlled to the inlet of the oil-water overflow pipe 350. Air is introduced into the oil-water aeration tank 330 through the second aeration pipe 331, and aeration is performed. On the one hand, the oil-water separation is promoted, especially the separation of the emulsified oil-water, and on the other hand, the liquid level in the oil-water aeration tank 330 is fluctuated, and the transformer oil and part of the water floating on the liquid level overflow from the oil-water overflow pipe 350 and enter the oil-water separation pipe 340. After a period of time, the mixture is allowed to stand to separate the oil and water in the oil-water separation pipe 340. When the oil-water mixture in the transformer accident pool is treated by the oil-water separation device 300, the emulsified transformer oil in the sewage is separated from the water through aeration, and the oil floats above the liquid level, thereby reducing the oil content in the water phase after the oil-water separation. The liquid level fluctuates, and the oil and part of the water floating above the liquid level enter the oil-water separation tube 340, stand still and separate into layers, and the water phase at the bottom can be returned to the oil-water aeration tank 330 for secondary aeration to increase the treatment depth. The oil phase is discharged, which greatly reduces the amount of water in the oil phase and realizes true oil-water separation.

[0035] Furthermore, the oil-water separation device 300 further includes: a low-level circulating water tank 360, on which a circulating water feed pipe 361 and a circulating water pump 362 are provided, the circulating water feed pipe 361 is connected to the bottom discharge port of the oil-water separation pipe 340, the inlet of the circulating water pump 362 is connected to the low-level circulating water tank 360, and the outlet is connected to the water supply pipe 332. First, the sewage is statically layered in the oil-water separation pipe 340, and the water phase of the lower layer is discharged into the low-level circulating water tank 360 through the circulating water feed pipe 361 for temporary storage, and the oil phase can be trapped in the oil-water separation pipe 340 or discharged from the discharge port. Secondly, during the aeration process of the oil-water aeration tank 330, when the liquid level of the oil-water aeration tank 330 is low and the liquid level fluctuation is not sufficient to cause the oil-water mixture to overflow into the oil-water overflow pipe 350, the circulating water pump 362 is started to pump the sewage stored in the low-level circulating water tank 360 into the oil-water aeration tank 330, on the one hand to supplement the liquid level loss, on the other hand to achieve sewage circulation aeration treatment and improve the sewage treatment effect.

[0036] Preferably, the outlet of the circulating water pump 362 is connected to the bottom or middle of the oil-water aeration tank 330 to avoid level fluctuations during the circulating water replenishment process, causing excessive water to overflow into the oil-water separation pipe 340, thereby improving separation efficiency. Furthermore, a sewage inlet pipe for sending transformer accident pool sewage into the oil-water aeration tank 330 is arranged at the inlet end or outlet end of the circulating water pump 362, so that the circulating water pump 362 can be used to feed the oil-water aeration tank 330, saving equipment installation space and reducing operating costs.

[0037] In order to facilitate industrial production and realize automatic control, in a preferred embodiment, the oil-water separation device 300 is also provided with an automatic control component.

[0038] For example, the oil-water separation tube 340 is provided with a second liquid level sensor 501, and the circulating water feed tube 361 is provided with a liquid level control valve 502, and the liquid level control valve 502 is interlocked with the second liquid level sensor 501. That is, when the second liquid level sensor 501 detects that the liquid level of the oil-water separation tube 340 reaches the high threshold, static stratification begins, and after a predetermined time, the liquid level control valve 502 is automatically opened to discharge the water phase into the low-level circulating water tank 360. When the liquid level reaches the low threshold, the liquid level control valve 502 is automatically closed to stop draining. In this way, after each static stratification, the oil phase is trapped in the oil-water separation tube 340, and an oil column is formed through continuous accumulation, thereby further reducing the water content in the oil phase, reducing the amount of waste oil to be treated, and reducing the cost of sewage disposal.

[0039] For example, the water replenishment pipe 332 is provided with a second water replenishment control valve 503, and the second water replenishment control valve 503 is interlocked with the second liquid level sensor 501. That is, during the aeration process, when the liquid level in the oil-water separation pipe 340 does not reach the high level threshold, but the liquid level is stagnant (the liquid level change rate is zero or decreases), the water replenishment control valve is opened to replenish water into the oil-water aeration tank 330 to keep the liquid level of the oil-water aeration tank 330 stable.

[0040] For example, the second aeration pipe 331 is provided with a second aeration control valve 504, and the second aeration control valve 504 is interlocked with the second liquid level sensor 501. That is, when the liquid level in the oil-water separation pipe 340 reaches the high level threshold, the second aeration control valve 504 is automatically closed to stop aeration. The sewage in the oil-water aeration tank 330 and the sewage in the oil-water separation pipe 340 are allowed to stand and stratify at the same time.

[0041] For example, the oil-water separation device 300 further includes a second microcontroller 500, the second microcontroller 500 has a signal input end and a signal output end, the signal input end is electrically connected to the second liquid level sensor 501, and the signal output end is electrically connected to the liquid level control valve 502, the second water replenishment control valve 503 and the second aeration control valve 504. In a preferred embodiment, oil-water separation of a transformer accident pool includes the following process.

[0042] When the liquid level of the oil-water aeration tank 330 reaches the target liquid level, the second aeration control valve 504 is opened to perform aeration. During the aeration process, the liquid level of the oil-water aeration tank 330 fluctuates, and the upper oil-water mixture enters the oil-water separation pipe 340. The second liquid level sensor 501 detects the liquid level of the oil-water separation pipe 340. When the liquid level change rate of the oil-water separation pipe 340 decreases or the liquid level does not rise, the second water replenishment control valve 503 is opened to replenish sewage into the oil-water aeration tank 330. When the liquid level of the oil-water separation pipe 340 reaches the high threshold (for example, when the liquid level of the oil-water separation pipe 340 reaches 95%), the second water replenishment control valve 503 is closed, the second aeration control valve 504 is closed, and the oil-water separation pipe 340 is left standing. After standing for a period of time (for example, after standing for 1 hour), the liquid level control valve 502 is opened to discharge the water at the bottom of the oil-water separation pipe 340 into the low-level circulating water tank 360. When the liquid level of the oil-water separation pipe 340 reaches the low threshold (for example, when the liquid level of the oil-water separation pipe 340 reaches 10%), the liquid level control valve 502 is closed, and the second aeration control valve 504 is opened at the same time, and the above steps are repeated several times, for example, the last step is repeated 3 to 5 times. Furthermore, an oil discharge control valve 505 is also provided at the bottom of the oil-water separation pipe 340. After the liquid level control valve 502 is closed for the last time, the oil discharge control valve 505 is opened to discharge the oil and oil-water mixture in the upper layer of the oil-water separation pipe 340.

[0043] In a specific embodiment, the oil-water overflow pipe 350 is arranged at an angle, and the end of the oil-water overflow pipe 350 close to the oil-water aeration tank 330 is higher than the end close to the oil-water separation pipe 340, so that the oil-water mixture overflowing from the oil-water aeration tank 330 into the oil-water overflow pipe 350 can flow into the oil-water separation pipe 340 by gravity.

[0044] In a specific embodiment, the diameter of the oil-water separation tube 340 is not greater than 5 cm. In principle, the smaller the diameter of the oil-water separation tube, the more conducive it is for the pressure-variable oil floating above the oil-water interface to gather and form an oil column. However, considering that the amount of oil-water mixture overflowing into the oil-water separation tube 340 during one aeration process is sufficient to reduce the number of cyclic aeration times, it is preferred that the diameter of the oil-water separation tube 340 is 2 cm to 3 cm. At the same time, the oil-water separation tube 340 has a certain height, for example, the height of the oil-water separation tube 340 is 80 cm to 150 cm, so that the oil-water separation tube 340 has sufficient volume, thereby reducing the number of cyclic aeration times. For example, the oil-water separation tube 340 is a serpentine tube type to further increase the volume of the oil-water separation tube 340.

[0045] It is worth noting that, since the diameter of the oil-water separation tube 340 is small, or a serpentine pipe is provided, and the amount of the oil-water mixture overflowing from the oil-water aeration tank 330 to the oil-water separation tube 340 is small, the oil-water mixture flows down along the tube wall of the oil-water separation tube 340 in the process of flowing from the upper part to the lower part of the oil-water separation tube 340. Since the surface tension of the transformer oil and water on the tube wall of the oil-water separation tube 340 is different, the transformer oil is easy to adhere to the tube wall of the oil-water separation tube 340, while the water is accelerated to flow down to the bottom of the oil-water separation tube 340, which is conducive to the rapid separation of oil and water in the oil-water separation tube 340 and improves the oil-water separation efficiency.

[0046] In a preferred embodiment, the oil-water aeration tank 330 includes an aeration portion 3301, an overflow neck 3302 and a pressure relief portion 3303 connected in sequence from bottom to top, the diameter of the overflow neck 3302 is smaller than the diameters of the aeration portion 3301 and the pressure relief portion 3303, and the oil-water overflow pipe 350 is arranged on the overflow neck 3302. Preferably, the upper portion of the aeration portion 3301 is arranged in an arc shape. In other words, the cross-sectional area at the bottom of the oil-water aeration tank 330 is relatively large, and gradually shrinks upward, and when it reaches the overflow neck 3302, the cross-sectional area becomes smaller. The sewage of the transformer accident pool enters the oil-water aeration tank 330, and the transformer oil is guided by the aeration portion 3301 and converges to the overflow neck 3302, and finally forms a section with a high oil content in the overflow neck 3302. During the aeration process, the liquid level at the overflow neck 3302 fluctuates, and the oil-water mixture with a higher oil content at the overflow neck 3302 overflows into the oil-water overflow pipe 350, thereby accelerating the oil-water separation process. The pressure relief portion 3303 is provided to prevent excessive fluctuations in the liquid level during the aeration process, which may cause the liquid level to suddenly rise above the pressure relief portion 3303, thereby causing pollution to overflow.

[0047] Furthermore, in order to facilitate automatic control and reduce labor costs, the oil-water buffer tank 200 is also provided with an automatic control component.

[0048] For example, the oil-water buffer tank 200 is provided with a first liquid level sensor 601 for monitoring the liquid level in the oil-water buffer tank 200, and the outlet end of the wastewater circulation pump 320 is provided with a first water replenishment control valve 602, and the first liquid level sensor 601 is interlocked with the first water replenishment control valve 602. That is, the first liquid level sensor 601 monitors the oil-water liquid level in the oil-water buffer tank 200, and when the oil-water liquid level reaches a high level threshold, the first water replenishment control valve 602 is controlled to close, and the water replenishment to the oil-water buffer tank 200 is stopped.

[0049] For example, the first aeration pipe 240 is provided with a first aeration control valve 603, and the first aeration control valve 603 is interlocked with the first liquid level sensor 601. When the oil-water liquid level reaches a high threshold, the first aeration control valve 603 is opened to aerate the oil-water buffer tank 200. It is worth noting that aeration is conducive to the desorption of the transformer oil attached to debris such as dust, sand, and dead animals and plants, and is also conducive to the separation and analysis of oil-water emulsions in the oil-water mixture.

[0050] For example, the oil-water discharge pump 230 is provided with a drainage control valve 604, which is interlocked with the first liquid level sensor 601. When the oil-water level reaches a high threshold and after a predetermined aeration time, the drainage control valve 604 opens to discharge the oil-water mixture.

[0051] For example, the oil-water buffer tank 200 is further provided with a first microcontroller 600, the signal input end of the first microcontroller 600 is electrically connected to the first liquid level sensor 601, and the signal output end is electrically connected to the first water replenishment control valve 602, the first aeration control valve 603 and the drainage control valve 604. Preferably, the first microcontroller 600 includes a timing unit.

[0052] In a specific embodiment, the oil-water mixture in the accident oil pool 100 is sent to the impurity retention filter frame 220 through the oil-water feed pump 210, and debris such as dust, sand, and animal and plant carcasses are retained in the impurity retention filter frame 220, and the oil-water mixture fills the inner cavity of the oil-water buffer tank 200. The first microcontroller 600 controls the first water replenishment control valve 602 to open, and replenishes the oil-water buffer tank 200 with water with less oil content after oil-water separation, until the oil-water level in the oil-water buffer tank 200 reaches the high threshold, and then closes the first water replenishment control valve 602 to stop replenishing water. The first aeration control valve 603 is opened to aerate the oil-water buffer tank 200, and timing is set at the same time. After a period of aeration, the first aeration control valve 603 is closed, and the drainage control valve 604 is opened to drain the oil-water mixture in the oil-water buffer tank 200. When the oil-water level in the oil-water buffer tank 200 reaches the low threshold, the first water replenishment control valve 602 is opened to replenish water into the oil-water buffer tank 200, and the cycle is repeated several times in sequence to fully soak the transformer oil attached to dust, sand, dead animals and plants and other debris, thereby reducing the transformer oil attached to dust, sand, dead animals and plants and other debris and achieving harmless disposal.

[0053] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A transformer accident oil pool system, characterized in that: include: Accident oil pool; An oil-water buffer tank, an oil-water feed pump is arranged on the oil-water buffer tank, the inlet of the oil-water feed pump is connected to the accident oil pool, and the outlet is connected to the oil-water buffer tank; a debris retention filter frame is arranged in the oil-water buffer tank, the debris retention filter frame is a frame body with filter holes opened on all sides, and is suspended in the oil-water buffer tank; the outlet of the oil-water feed pump extends into the debris retention filter frame; an oil-water discharge pump is also arranged on the oil-water buffer tank, and the inlet of the oil-water discharge pump is connected to the oil-water buffer tank; and an oil-water separation device for separating wastewater and waste oil, the feed end of the oil-water separation device is connected to the outlet of the oil-water discharge pump, and the water outlet end is connected to a wastewater storage tank, a wastewater circulation pump is arranged on the wastewater storage tank, the inlet of the wastewater circulation pump is connected to the wastewater storage tank, and the outlet is connected to the oil-water Cache tank, the transformer accident oil pool system also includes an oil-water separation device, the oil-water separation device includes an oil-water aeration tank and an oil-water separation pipe, the bottom of the oil-water aeration tank is provided with a second aeration pipe and a water supply pipe, and the upper part is provided with an oil-water overflow pipe; the upper feed end of the oil-water separation pipe is connected to the oil-water overflow pipe, the oil-water aeration tank includes an aeration part, an overflow neck and a pressure relief part which are connected in sequence from bottom to top, the upper part of the aeration part is arranged in an arc shape, the cross-sectional area of ​​the bottom of the oil-water aeration tank is large, and gradually shrinks upward, the diameter of the overflow neck is smaller than the diameters of the aeration part and the pressure relief part, the oil-water overflow pipe is arranged on the overflow neck, the oil-water overflow pipe is arranged obliquely, and the end of the oil-water overflow pipe close to the oil-water aeration tank is higher than the end close to the oil-water separation pipe.

2. The transformer emergency oil pool system according to claim 1, characterized in that: It also includes an oil-water filter, the feed end of the oil-water filter is connected to the outlet of the oil-water discharge pump, and the discharge end is connected to the feed end of the oil-water separation device; an oil absorption filter element is arranged in the oil-water filter.

3. The transformer emergency oil pool system according to claim 2, characterized in that: The outlet end of the wastewater circulation pump is also connected to a water replenishment heating heat exchanger, and the discharge end of the water replenishment heating heat exchanger is connected to the oil-water buffer tank; the outlet end of the oil-water discharge pump is connected to an outlet water cooling heat exchanger, and the discharge end of the outlet water cooling heat exchanger is connected to the oil-water filter.

4. The transformer emergency oil pool system according to claim 1, characterized in that: The oil-water buffer tank is also provided with a first aeration pipe, and the outlet of the first aeration pipe extends into the debris interception filter frame.

5. The transformer emergency oil pool system according to claim 1, characterized in that: An anti-clogging protrusion is arranged on the inner wall of the debris retaining filter frame.

6. The transformer emergency oil pool system according to claim 1, characterized in that: The oil-water separation device also includes a low-level circulating water tank, on which a circulating water feed pipe and a circulating water pump are provided. The circulating water feed pipe is connected to the bottom discharge port of the oil-water separation pipe, the inlet of the circulating water pump is connected to the low-level circulating water tank, and the outlet is connected to the water supply pipe.

7. The transformer emergency oil pool system according to claim 6, characterized in that: The oil-water separation pipe is provided with a second liquid level sensor, the circulating water feed pipe is provided with a liquid level control valve, the water replenishment pipe is provided with a second water replenishment control valve, and the second aeration pipe is provided with a second aeration control valve; the oil-water separation device also includes a second microcontroller, the second microcontroller has a signal input end and a signal output end, the signal input end is electrically connected to the second liquid level sensor, and the signal output end is electrically connected to the liquid level control valve, the second water replenishment control valve and the second aeration control valve.

8. The transformer emergency oil pool system according to claim 4, characterized in that: The oil-water buffer tank is provided with a first liquid level sensor for monitoring the liquid level in the oil-water buffer tank, the outlet end of the wastewater circulation pump is provided with a first water replenishment control valve, the first aeration pipe is provided with a first aeration control valve, the outlet end of the oil-water discharge pump is provided with a drainage control valve, and the oil-water buffer tank is also provided with a first microcontroller, the signal input end of the first microcontroller is electrically connected to the first liquid level sensor, and the signal output end is electrically connected to the first water replenishment control valve, the first aeration control valve and the drainage control valve.

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