An online monitoring device for sewage discharge of transformer substation accident oil pool

Abstract

The present application belongs to the field of substation sewage treatment and monitoring, and particularly relates to a substation accident oil pool sewage discharge online monitoring device. The device comprises an accident oil pool and a heavy oil pool arranged below the cobble fence layer below the main transformer, a temporary storage pool is arranged above the accident oil pool, an electric valve and a drain pipe are arranged on the temporary storage pool, a drain pump is arranged on the drain pipe, a liquid detector is further arranged in the temporary storage pool, the accident oil pool is connected with a sewage buffer tank and a multi-stage oil-water separation system through a pipeline, the drain pipe is connected with the water inlet side of the sewage buffer tank through a first branch pipe, one way of the water outlet end of the sewage buffer tank is connected with the drain pipe through a second branch pipe and the other way is connected with the multi-stage oil-water separation system, an electromagnetic valve one is arranged on the first branch pipe, an electromagnetic valve two is arranged on the second branch pipe, and an electromagnetic valve three is arranged on the drain pipe between the first branch pipe and the second branch pipe, an upper limit liquid level detector is arranged in the accident oil pool, the sewage buffer tank is connected with a sewage detector, the sewage detector is connected with a control unit through an Ethernet, and the control unit communicates with a monitoring center in a bidirectional mode. The present application provides a substation accident oil pool sewage discharge online monitoring device, which has the characteristics of multiple application scenarios, small working burden of oil-water separation equipment and online wastewater discharge monitoring.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of substation sewage treatment and monitoring, and particularly relates to a substation accident oil pool sewage discharge online monitoring device. BACKGROUND

[0002] In the working condition of the transformer oil pool of a substation, the oil stains leaked from the transformer drip into the stone mill below the transformer and flow through the accident oil pool for storage. These oil stains cannot completely decompose by themselves in the natural environment and are stored all the time. When it rains, the oil stains are washed out and flow with the rainwater to the nearby rivers and farmlands, causing ecological pollution. For this reason, engineers have designed a substation sewage monitoring and control system, such as the invention patent with the patent publication number CN116351104A and the patent name of a substation accident oil pool environmental protection monitoring and control system and method, which is a typical one. The oil stain treatment unit thereof can separate and treat the oil-water mixture according to the control of the monitoring and control unit, so that the discharged liquid after treatment can meet the standard of environmental protection sewage discharge and has good effect, but it has the problem that the working pressure of the oil stain treatment unit is high, that is, the oil stains cannot be classified and treated, but the oil-water mixture liquid mixed after the natural rainwater in the main transformer accident oil pool is directly treated, the use condition is single, the filter membrane of the sewage treatment unit is easy to fail and needs to be frequently replaced, and even monitoring false alarms are caused. SUMMARY

[0003] To solve the problems in the background art, the application provides a substation accident oil pool sewage discharge online monitoring device, which has the characteristics of multiple application scenarios, small working burden of the oil-water separation equipment and online wastewater discharge monitoring.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme: a substation accident oil pool sewage discharge online monitoring device, which comprises an accident oil pool and a heavy oil pool arranged below the stone barrier layer below the main transformer, a temporary storage pool arranged above the accident oil pool, an electric valve and a drain pipe arranged above the temporary storage pool, a drain pump arranged on the drain pipe, a liquid detector arranged in the temporary storage pool, a sewage buffer tank and a multi-stage oil-water separation system connected to the accident oil pool through a pipeline, the drain pipe connected to the water inlet side of the sewage buffer tank through a first branch pipe, one way of the water outlet end of the sewage buffer tank connected to the drain pipe through a second branch pipe, and the other way connected to the multi-stage oil-water separation system, an electromagnetic valve one arranged on the first branch pipe, an electromagnetic valve two arranged on the second branch pipe, and an electromagnetic valve three arranged on the drain pipe between the first branch pipe and the second branch pipe, an upper limit liquid level detector arranged in the accident oil pool, a sewage detector connected to the sewage buffer tank, the sewage detector connected to a control unit through an Ethernet, and the control unit in bidirectional communication with a monitoring center.

[0005] The liquid detector and the sewage detector are connected to the input end of the control unit and are used for selectively opening the electric valve and the drainage pump and for transmitting water quality information in real time, the upper limit liquid level detector is connected to the input of the control unit and is used for triggering emergency alarm information, the electric valve, the drainage pump, the electromagnetic valve one, the electromagnetic valve two and the electromagnetic valve three are connected to the output end of the control unit, and the electromagnetic valve one and the electromagnetic valve three are interlocked.

[0006] Preferably, the emergency oil pool is provided with a rapid discharge pipe, the rapid discharge pump is connected to the rapid discharge pipe, and the other end of the rapid discharge pipe is connected to the water outlet side of the sewage buffer tank.

[0007] Preferably, the sewage buffer tank comprises a sewage chamber and an oil collecting chamber, and an interface sensor penetrates through the sewage chamber and the oil collecting chamber, the interface sensor is connected to the control unit, the sewage detector is located at the lower end of the sewage chamber, and the water outlet of the sewage chamber is located at the lower end of the sewage detector.

[0008] Preferably, a water blocking membrane is arranged between the sewage chamber and the oil collecting chamber, a first capacitor rod and a first oil discharge control valve electrically connected to the control unit are arranged at the upper end of the oil collecting chamber, and the first oil discharge control valve is connected to the heavy oil pool through a first oil discharge pipe.

[0009] Preferably, the multi-stage oil-water separation system comprises an oil-water separation tank and a filter connected to the rear end of the oil-water separation tank, the water outlet side of the filter is connected to a drainage pipe, the water outlet end of the filter is connected to a water-oil detector, the control end of the water-oil detector is connected to a reversing valve, the water outlet end of the reversing valve is connected to a sewage storage tank and the drainage pipe, and the end of the drainage pipe is connected to a drainage valve, and the drainage valve and the water-oil detector are electrically connected to the control unit.

[0010] Preferably, the sewage storage tank is connected with a backflow pipe, and the backflow pipe is connected to the water inlet end of the sewage buffer tank.

[0011] Preferably, a second capacitor rod and a second oil discharge control valve are arranged on the filter, a third capacitor rod and a third oil discharge control valve are arranged at the upper end of the oil-water separation tank, and the second oil discharge control valve and the third oil discharge control valve are connected to the heavy oil pool through an oil discharge pump.

[0012] Compared with the prior art, the present application has the following beneficial effects:

[0013] In the present application, the liquid detector is arranged on the upper end of the emergency oil pool and the temporary storage tank, and is used for initially determining whether the mixture is oil-water or the mixture of transformer leakage oil and rainwater, and the corresponding different sewage treatment modes are started, so that the rainwater and the mixture of transformer leakage oil and rainwater can be naturally discharged and treated and detected, the work burden of sewage treatment and unnecessary oil-water separation is reduced, the membrane does not need to be frequently replaced, and the difficulty of monitoring is reduced.

[0014] Secondly, the upper limit liquid leveler is arranged in the sewage pool, which not only triggers an alarm signal to facilitate early warning of dangerous situations, but also starts emergency drainage, sewage directly enters the multi-stage oil-water separation system through the sewage buffer box to speed up the efficiency of sewage treatment, and the sewage at the bottom of the accident oil pool treated by the multi-stage oil-water separation system is detected by the water-oil detector to meet the national discharge standard, and the sewage that does not meet the standard is returned to the multi-stage oil-water separation system for treatment again to meet the discharge standard, which can be infinitely circulated to achieve the purpose of safe and environmentally friendly discharge. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and are used to explain the application, and do not constitute a limitation on the application. In the drawings:

[0016] Figure 1 is a structural schematic diagram of the application;

[0017] In the figure: 1, accident oil pool; 2, heavy oil pool; 3, temporary storage pool; 4, electric valve; 5, drain pipe; 6, drain pump; 7, liquid detector; 8, multi-stage oil-water separation system; 9, electromagnetic valve one; 10, electromagnetic valve two; 11, electromagnetic valve three; 12, upper limit liquid leveler; 13, sewage buffer box; 14, sewage detector; 15, rapid discharge pipe; 16, rapid discharge pump; 17, sewage storage box; 18, control unit; 19, oil discharge pump; 81, oil-water separation box; 82, filter; 83, water-oil detector; 84, reversing valve; 85, drain valve; 86, second capacitor rod; 87, second oil discharge control valve; 88, third capacitor rod; 89, third oil discharge control valve 131, sewage chamber; 132, oil collection chamber; 133, interface sensor; 134, water blocking membrane; 135, first capacitor rod; 136, first oil discharge control valve. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the application. EMBODIMENT

[0019] Please refer to Figure 1The application provides the following technical scheme: An on-line monitoring device for sewage discharge of an accident oil pool 1 of a transformer substation, which comprises the accident oil pool 1 and a heavy oil pool 2 arranged below a cobble fence layer below a main transformer, a temporary storage pool 3 arranged above the accident oil pool 1, an electric valve 4 and a drain pipe 5 arranged above the temporary storage pool 3, a drain pump 6 arranged on the drain pipe 5, a liquid detector 7 arranged in the temporary storage pool 3, the accident oil pool 1 connected with a sewage buffer tank 13 and a multi-stage oil-water separation system 8 through a pipeline, the drain pipe 5 connected with the sewage buffer tank 13 through a first branch pipe, the sewage buffer tank 13 connected with the drain pipe 5 through a second branch pipe, and the second branch pipe connected with the multi-stage oil-water separation system 8, an electromagnetic valve one 9 arranged on the first branch pipe, an electromagnetic valve two 10 arranged on the second branch pipe, and an electromagnetic valve three 11 arranged on the drain pipe 5 between the first branch pipe and the second branch pipe, an upper limit liquid level detector 12 arranged in the accident oil pool 1, the sewage buffer tank 13 connected with a sewage detector 14, the sewage detector 14 connected with a control unit 18 through an Ethernet, and the control unit 18 in bidirectional communication with a monitoring center.

[0020] The liquid detector 7 and the sewage detector 14 are connected with an input end of the control unit 18 and used for selectively opening the electric valve 4 / drain pump 6 and transmitting water quality information in real time, the upper limit liquid level detector 12 is connected with the input end of the control unit 18 and used for triggering an emergency alarm information, the electric valve 4, the drain pump 6, the electromagnetic valve one 9, the electromagnetic valve two 10 and the electromagnetic valve three 11 are connected with output ends of the control unit 18, and the electromagnetic valve one 9 and the electromagnetic valve three 11 are interlocked.

[0021] Working principle and process: When it is rainwater, the rainwater is actually natural water without being polluted by leaked oil, so the rainwater can be directly discharged, and the liquid detector 7 transmits detection values to the control unit 18 after detecting the rainwater, and the control unit 18 uploads the data to the monitoring center and opens the drain pump 6, so that the natural water is directly discharged. Due to the environment of the transformer substation site and rainwater washing the ground, the oil content of the water in the temporary storage pool 3 is higher than that of natural rainwater but lower than that of the mixed situation of the main transformer leakage and rainwater, and in addition, the water in the temporary storage pool 3 can be separated from oil or simply filtered to meet the discharge standard as long as the water in the temporary storage pool 3 is static, at this time, the electromagnetic valve one 9 and the electromagnetic valve two 10 are opened, and the electromagnetic valve three 11 is closed, at this time, the water in the temporary storage pool 3 is filtered through the sewage buffer tank 13 to meet the discharge standard, and the water at the end of the drain pipe 5 is detected by a water-oil detector 83 before being discharged, and the water that does not meet the standard needs to be returned to the multi-stage oil-water separation system 8 through the sewage storage tank 17.

[0022] When the mixture of oil and rainwater leaks from the transformer, the liquid detector 7 monitors the oil concentration to trigger an alarm signal and open the electric valve 4 through the control unit 18, and the mixture of oil and rainwater is discharged into the emergency oil tank 1. Since the emergency oil tank 1 has a certain capacity, the sewage is stored through the sewage buffer tank 13 to make the oil and water fully separated and then discharged through the sewage pipe. Similarly, the backflow does not meet the emission standard. The sewage buffer tank 13 includes a sewage chamber 131, an oil collection chamber 132, and an interface sensor 133. The interface sensor 133 penetrates the sewage chamber 131 and the oil collection chamber 132. The interface sensor 133 is connected to the control unit 18. The sewage detector 14 is located in the sewage chamber 131. The water outlet of the sewage chamber 131 is located at the lower end of the sewage detector 14. A water-blocking film 134 is arranged between the sewage chamber 131 and the oil collection chamber 132. A first capacitor rod 135 and a first oil discharge control valve 136 electrically connected to the control unit 18 are arranged at the upper end of the oil collection chamber 132. The first oil discharge control valve 136 is connected to the heavy oil tank 2 through a first oil discharge pipe. Here, the interface sensor 133 detects the position of oil and water in the sewage buffer tank 13 to determine whether the liquid in the sewage buffer tank 13 is full. The sewage treatment is intermittent, and the treated oil and water are sent to the corresponding positions. At this time, the sewage buffer tank 13 is provided with a hydraulic pump. Further, when the upper limit level sensor 12 reaches the position, the upper limit level sensor 12 triggers an alarm signal to facilitate early warning of danger. At this time, emergency drainage is started. The sewage directly enters the multi-stage oil-water separation system 8 to speed up the efficiency of sewage treatment, and the water and oil detector 83 at the end of the drain pipe 5 cooperates with the multi-stage oil-water separation system 8 to treat the sewage at the bottom of the emergency oil tank 1. The treated sewage meets the national emission standard and is discharged. The sewage that does not meet the standard is returned through the backflow pipe and treated again by the multi-stage oil-water separation system 8 to meet the emission standard before being discharged. The sewage can be infinitely circulated to achieve the purpose of safe and environmentally friendly discharge. The rapid discharge is realized through the rapid discharge pipe 15. Specifically, the emergency oil tank 1 is provided with a rapid discharge pipe 15. The rapid discharge pipe 15 is connected to the sewage buffer tank 13 on the water outlet side. Of course, the sewage buffer tank 13 and the multi-stage oil-water separation system 8 can be parallel to further speed up the oil-water separation. In this scheme, the water outlet of the sewage chamber 131 is located at the lower end of the sewage detector 14 because oil floats on water. When the sewage detector 14 detects that the static sewage is qualified, the water below the sewage detector 14 is also qualified. At the same time, the sewage detector 14 can monitor the oil content and other pollutants in the sewage and report the data to the monitoring center.In summary, by setting the temporary storage tank 3 on the upper end of the accident oil pool 1 and setting the liquid detector 7 on the temporary storage tank 3, the oil and water or the mixture of the transformer leakage oil and rainwater can be initially measured, and the different sewage treatment modes are opened accordingly. The rainwater and the mixture of the transformer leakage oil and rainwater can be naturally discharged, and the work burden of the sewage treatment and unnecessary oil-water separation can be reduced, the membrane does not need to be frequently replaced, and the monitoring difficulty is reduced.

[0023] Further, the multi-stage oil-water separation system 8 comprises an oil-water separation tank 81, a filter 82 connected to the rear end of the oil-water separation tank 81, and the water outlet side of the filter 82 is connected to the drain pipe 5. The water outlet end of the filter 82 is connected to the water-oil detector 83, the control end of the water-oil detector 83 is connected to the reversing valve 84, the water outlet end of the reversing valve 84 is connected to the sewage storage tank 17 and the drain pipe 5, the end of the drain pipe 5 is connected to the drain valve 85, and the drain valve 85 and the water-oil detector 83 are electrically connected to the control unit 18. The sewage storage tank 17 is connected with a backflow pipe connected to the water inlet end of the sewage buffer tank 13. The filter 82 is provided with a second capacitor rod 86 and a second oil discharge control valve 87, the upper end of the oil-water separation tank 81 is provided with a third capacitor rod 88 and a third oil discharge control valve 89, and the second oil discharge control valve 87 and the third oil discharge control valve 89 are connected to the heavy oil pool 2 through an oil discharge pump. The working process is that the sewage first enters the oil-water separation tank 81 for primary separation, then passes through the filter 82 to discharge the oil stains and discharge the water, the oil-water separation tank 81 is provided with a baffle to well separate the oil and water, so that the primary oil-water separation and the further filtration of the filter 82 can further reduce the filtration pressure, and the discharged water and oil enter the above-mentioned corresponding positions. The capacitor rod is used for detecting whether the oil needs to be discharged, and the oil discharge control valve can realize the control of discharging the oil.

Claims

1. An online monitoring device for substation oil sump sewage discharge, comprising an accident oil sump (1) and a heavy oil sump (2) arranged below the pebble fence layer below the main transformer, characterized in that: Above the accident oil tank (1) is a temporary storage tank (3), on which is an electric valve (4) and a drain pipe (5). A drain pump (6) is installed on the drain pipe (5). A liquid detector (7) is also installed inside the temporary storage tank (3). The accident oil tank (1) is connected to a sewage buffer tank (13) and a multi-stage oil-water separation system (8) through a pipe. The drain pipe (5) is connected to the inlet side of the sewage buffer tank (13) through a first branch pipe. The outlet of the sewage buffer tank (13) is connected to the drain pipe (5) through a second branch pipe. One line is connected to the multi-stage oil-water separation system (8). The first branch pipe is equipped with a solenoid valve one (9), the second branch pipe is equipped with a solenoid valve two (10), and the drain pipe (5) is equipped with a solenoid valve three (11) located between the first and second branch pipes. The emergency oil tank (1) is equipped with an upper limit level gauge (12). The sewage buffer tank (13) is connected to the sewage detector (14). The sewage detector (14) is connected to the control unit (18) via Ethernet. The control unit (18) communicates bidirectionally with the monitoring center. The liquid detector (7) and the sewage detector (14) are connected to the input of the control unit (18) to select one of the electric valve (4) / drainage pump (6) and to transmit water quality information in real time. The upper limit level gauge (12) is connected to the input of the control unit (18) to trigger emergency alarm information. The electric valve (4), drainage pump (6), solenoid valve one (9), solenoid valve two (10) and solenoid valve three (11) are connected to the output of the control unit (18). Solenoid valve one (9) and solenoid valve three (11) are interlocked. The sewage buffer tank (13) includes a sewage chamber (131) and an oil collection chamber (132) and an interface sensor (133). The interface sensor (133) passes through the sewage chamber (131) and the oil collection chamber (132). The interface sensor (133) is connected to the control unit (18). The sewage detector (14) is located in the sewage chamber (131). The outlet of the sewage chamber (131) is located at the lower end of the sewage detector (14). A water-blocking membrane (134) is provided between the oil collection chambers (132). A first capacitor rod (135) and a first oil discharge control valve (136) are provided at the upper end of the oil collection chambers (132) and are electrically connected to the control unit (18). The first oil discharge control valve (136) is connected to the heavy oil tank (2) through the first oil discharge pipe. The multi-stage oil-water separation system (8) includes an oil-water separation tank (81) and a filter (82) connected to the rear end of the oil-water separation tank (81). The outlet side of the filter (82) is connected to the drain. The water pipe (5) and filter (82) are connected to the water and oil detector (83) at the outlet end. The control end of the water and oil detector (83) is connected to the reversing valve (84). The outlet end of the reversing valve (84) is connected to the sewage storage tank (17) and the drain pipe (5). The end of the drain pipe (5) is connected to the drain valve (85). The drain valve (85) and the water and oil detector (83) are electrically connected to the control unit (18). The sewage storage tank (17) is connected to a return pipe, which is connected to the inlet end of the sewage buffer tank (13).

2. The online monitoring device for substation oil sump sewage discharge according to claim 1, characterized in that: The bottom of the accident oil pool (1) is provided with a rapid discharge pipe (15), the rapid discharge pipe (15) is connected with a rapid discharge pump (16), and the other end of the rapid discharge pipe (15) is connected to the water outlet side of the sewage buffer tank (13).

3. The online monitoring device for substation oil sump sewage discharge according to claim 1, characterized in that: The filter (82) is provided with a second capacitor rod (86) and a second oil discharge control valve (87), the upper end of the oil-water separation tank (81) is provided with a third capacitor rod (88) and a third oil discharge control valve (89), and the second oil discharge control valve (87) and the third oil discharge control valve (89) are connected to the heavy oil pool (2) through an oil discharge pump.

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