Special sewage collecting and discharging system and special sewage collecting and discharging method

Abstract

The invention discloses a special sewage collecting and discharging system and a special sewage collecting and discharging method. The special sewage collecting and discharging system and the special sewage collecting and discharging method can utilize a special sewage tank to realize the collecting, detecting and discharging process of special sewage, reduce the occupied area of the special sewage collecting and discharging system, simplify the operation steps of the special sewage collecting and discharging system and improve the utilization rate of the special sewage tank. The special sewage collecting and discharging system comprises a special sewage tank (1), a communicating pipe (3) and a communicating valve (4). A partition plate (2) is arranged in the special sink (1) and divides the special sink (1) into an upper groove and a lower groove which are independent from each other; the top end of the upper groove is provided with a water inlet, and the bottom of the lower groove is provided with a water outlet. And a communicating pipe (3) is communicated with the bottom of the upper groove and the lower groove. The communicating valve (4) is arranged on the communicating pipe (3) and used for controlling the communicating pipe (3) to be connected and disconnected.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear industry, and in particular relates to a special sewage collection and discharge system and a special sewage collection and discharge method. Background Art

[0002] In nuclear industry reprocessing plants, "special wastewater" refers specifically to a type of production wastewater that may contain radioactivity. Its sources mainly include various types of sanitary entrance and exit personnel disinfection wastewater, ground drainage in radioactive areas, process equipment decontamination wastewater, and post-processing and three-waste process discharge production wastewater with radioactivity levels below the set limit.

[0003] In accordance with relevant regulations and standards, special sewage should be discharged in a "tank type" and the radioactivity level of special sewage should be tested before discharge. Figure 1 As shown, the setting method of the special sewage tank in the prior art is: set up two identical special sewage tanks, first activate one of the special sewage tanks to collect the special sewage generated upstream, when the first special sewage tank reaches the full liquid level, close the water inlet valve of the first special sewage tank, and open the water inlet valve of the other special sewage tank at the same time, then take samples to detect the radioactivity level of the special sewage in the first special sewage tank, determine the subsequent treatment method, disposal or final discharge destination of the special sewage according to the radioactivity level, start the drainage pump corresponding to the first special sewage tank, open the control valve on the corresponding discharge pipeline, and discharge the special sewage to the relevant treatment facilities, disposal facilities or final environmental receptors. According to the conventional process of the above-mentioned "slot discharge" of special sewage, the two special sewage tanks are used alternately.

[0004] The main reason for setting up two special sewage tanks in the conventional trough discharge process of special sewage is that when one special sewage tank is full of special sewage, the water inlet control valve needs to be closed. After a series of operations such as sampling, testing, and discharge, the water inlet control valve can be reopened to collect the special sewage generated upstream. The time for intermittent collection of special sewage caused by the above sampling, testing, and discharge operations (hereinafter referred to as "intermittent time") takes several hours to several days. During the "intermittent time", if the upstream continues to produce special sewage, another special sewage tank needs to be activated to collect the special sewage generated during the "intermittent time". The volume of each special sewage tank must meet the amount of special sewage generated upstream during the "intermittent time".

[0005] The above-mentioned conventional trough discharge process of special drainage water requires the installation of two special drainage troughs, each of which is equipped with a corresponding drainage pump. They are used alternately during operation and switched frequently, which occupies a large room area and is cumbersome to operate. In addition, if the upstream special drainage water is not generated continuously and the amount generated is not large, it may take longer to fill one special drainage trough, and the other special drainage trough will be vacant for a long time, resulting in a low utilization rate of the special drainage trough. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a special sewage water collection and discharge system and a special sewage water collection and discharge method in view of the above-mentioned deficiencies in the prior art, which can utilize a special sewage water tank to realize the special sewage water collection, detection and discharge process, reduce the occupied area of ​​the special sewage water collection and discharge system, simplify the operation steps of the special sewage water collection and discharge system, and thereby improve the utilization rate of the special sewage water tank.

[0007] In a first aspect, an embodiment of the present invention provides a special water collection and discharge system, which includes a special water tank, a connecting pipe and a connecting valve. A partition is provided inside the special water tank, and the partition separates the special water tank into an upper tank and a lower tank that are independent of each other; a water inlet is provided at the top of the upper tank, and a drain is provided at the bottom of the lower tank. The connecting pipe connects the bottom of the upper tank and the lower tank. The connecting valve is provided on the connecting pipe to control the opening and closing of the connecting pipe.

[0008] In some embodiments, the sewage collection and discharge system further comprises an overflow pipe, wherein the overflow pipe is connected to the top of the upper tank and the lower tank.

[0009] In some embodiments, the sewage collection and discharge system further includes an exhaust pipe. The exhaust pipe includes a first exhaust pipe and a second exhaust pipe; one end of the first exhaust pipe is connected to the top of the upper tank, and the other end is located above the upper tank; one end of the second exhaust pipe is connected to the top of the lower tank, and the other end is located above the upper tank.

[0010] In some embodiments, the sewage collection and discharge system further comprises a first liquid level meter. The first liquid level meter is arranged in the lower tank and is used to detect the liquid level of the sewage in the lower tank.

[0011] In some embodiments, the sewage collection and discharge system further comprises a first controller. The first controller is electrically connected to the first liquid level meter and the connecting valve, respectively, and is used to control the opening and closing of the connecting valve according to the liquid level of the sewage in the lower tank detected by the first liquid level meter, so as to open the connecting valve when the liquid level of the sewage in the lower tank reaches a first liquid level, and close the connecting valve when the liquid level of the sewage in the lower tank reaches a second liquid level.

[0012] In some embodiments, the sewage collection and discharge system further comprises a second liquid level meter. The second liquid level meter is arranged in the upper tank and is used to detect the liquid level of the sewage in the upper tank.

[0013] In some embodiments, the low-flow water collection and discharge system further includes a second controller. The second controller is electrically connected to the first liquid level meter, the second liquid level meter and the connecting valve, respectively, and is used to control the opening and closing of the connecting valve according to the liquid level of the low-flow water in the lower tank detected by the first liquid level meter and the liquid level of the low-flow water in the upper tank detected by the second liquid level meter, so as to open the connecting valve when the liquid level of the low-flow water in the upper tank reaches a third liquid level, so that the low-flow water in the upper tank flows into the lower tank, and close the connecting valve when the liquid level in the lower tank reaches a second liquid level.

[0014] In some embodiments, the drainage collection and discharge system further comprises a main water outlet pipe. The water inlet of the main water outlet pipe is connected to the drainage outlet of the lower tank, and a drainage pump is arranged on the main water outlet pipe. The first controller / the second controller is also electrically connected to the drainage pump, and is also used to control the shutdown of the drainage pump according to the liquid level of the drainage in the lower tank detected by the first liquid level meter, so as to shut down the drainage pump when the liquid level in the lower tank reaches the first liquid level.

[0015] In some embodiments, a sampling valve is led out from the main water outlet pipe, and the sampling valve is arranged on a side of the drainage pump close to the lower trough, and the special drainage water in the lower trough can be sampled through the sampling valve.

[0016] In some embodiments, the drainage water collection and discharge system further includes a backup pump, which is connected in parallel to both ends of the drainage pump. The first controller / the second controller is also electrically connected to the backup pump, and is also used to control the shutdown of the backup pump according to the liquid level of the drainage water in the lower tank detected by the first liquid level meter when the drainage pump fails, so as to shut down the backup pump when the liquid level in the lower tank reaches the first liquid level.

[0017] In some embodiments, the special sewage collection and discharge system also includes a first water outlet pipe and a second water outlet pipe; the water inlet of the first water outlet pipe and the water inlet of the second water outlet pipe are both connected to the water outlet of the main water outlet pipe, and the first water outlet pipe is provided with a first discharge valve, and the second water outlet pipe is provided with a second discharge valve.

[0018] Therefore, the special sewage collection and discharge system in the embodiment of the present invention can separate the special sewage tank into an upper tank and a lower tank that are independent of each other by arranging a partition plate inside the special sewage tank. When the connecting valve on the connecting pipe is opened, the special sewage can enter the special sewage tank through the upper tank and the connecting pipe in sequence and enter the lower tank; after closing the connecting valve on the connecting pipe, the upper tank can be used to collect the special sewage, and it is convenient to discharge the special sewage in the lower tank after testing. After the special sewage water in the lower trough is discharged, the connecting valve can continue to be opened to use the lower trough to collect the special sewage water, and circulate it in this way, so that the upper trough and the lower trough in a special sewage trough can be used to realize the collection, detection and discharge process of the special sewage water, thereby reducing the occupied area of ​​the special sewage water collection and discharge system; and the special sewage water enters the special sewage trough through the same water inlet. Compared with the prior art that controls the entry channel of the special sewage water by controlling two different water inlet control valves, there is no need to operate the water inlet control valve, which can simplify the operating steps of the special sewage water collection and discharge system; during the use of the special sewage water collection and discharge system, the upper trough and the lower trough of the special sewage trough alternately collect the special sewage water, and the special sewage trough is always in use, thereby improving the utilization rate of the special sewage trough.

[0019] In a second aspect, an embodiment of the present invention provides a method for collecting and discharging special sewage, which is implemented based on the special sewage collection and discharge system in the first aspect, and the method includes: S10-S40. S10. Open the connecting valve to allow the special sewage entering the special sewage tank to flow into the lower tank through the connecting pipe. S20. Close the connecting valve, the lower tank stops collecting the special sewage, and the upper tank of the special sewage tank is used to collect the special sewage. S30. Detect the radioactivity level of the special sewage in the lower tank and discharge the special sewage in the lower tank. S40. Repeat steps S10-S30 in sequence and cycle.

[0020] In some embodiments, in S10, opening the connecting valve is specifically: after the connecting valve is closed, when the liquid level of the lower water in the lower tank drops to a first liquid level, opening the connecting valve; or, after the connecting valve is closed, allowing the lower water entering the lower water tank to first enter the upper tank, and when the liquid level of the lower water in the upper tank rises to a third liquid level, opening the connecting valve.

[0021] In some embodiments, in S20, the closing of the connecting valve is specifically: when the liquid level of the lower water in the lower tank rises to a second liquid level, the connecting valve is closed.

[0022] The method for collecting and discharging special sewage provided in the embodiment of the present invention has the same beneficial effects as the above-mentioned system for collecting and discharging special sewage, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 : A schematic diagram of a two-part special sink provided in the prior art;

[0024] Figure 2 : A schematic diagram of a special sewage collection and discharge system provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Embodiment 1:

[0027] like Figure 2 As shown, an embodiment of the present invention provides a sewage collection and discharge system, which is applied to a post-processing plant in the nuclear industry to collect and discharge sewage in the post-processing plant.

[0028] like Figure 2 As shown, the special water collection and discharge system includes a special water tank 1, a connecting pipe 3 and a connecting valve 4. A partition 2 is arranged inside the special water tank 1, and the partition 2 separates the special water tank 1 into an upper tank and a lower tank that are independent of each other. A water inlet is arranged at the top of the upper tank, and a drain is arranged at the bottom of the lower tank. The connecting pipe 3 connects the bottom of the upper tank and the lower tank. The connecting valve 4 is arranged on the connecting pipe 3, and is used to control the opening and closing of the connecting pipe 3.

[0029] Exemplarily, the volume of the special sewage tank 1 is determined based on the maximum amount of special sewage generated within the "interruption time" required for sampling, testing, and discharge operations. In this embodiment, the special sewage tank 1 is divided into an upper tank and a lower tank of equal volume by a partition 2, and the effective volumes of the upper tank and the lower tank are not less than the maximum amount of special sewage generated within the "interruption time".

[0030] For example, Figure 2 As shown, after the special lower water enters the upper trough through the water inlet at the top of the upper trough, when the connecting valve 4 is opened, the special lower water can enter the lower trough through the connecting pipe 3 by gravity.

[0031] Exemplarily, the lower edge of the upper pipe opening of the connecting pipe 3 is flush with the partition 2, so that the special water inside the upper tank can all enter the lower tank through the connecting pipe 3. The setting of the lower pipe opening of the connecting pipe 3 is relatively flexible and can be determined according to specific circumstances, as long as it does not affect the transfer of special water.

[0032] In the operation mode of the first special sewage collection and discharge system, in the initial state, the connecting pipe 3 is in an open state. After the special sewage enters the special sewage tank 1, it enters the lower tank through the upper tank and the connecting pipe 3 in sequence. After the water volume in the lower tank reaches a set value (for example, 90% of the total volume of the lower tank), the connecting valve 4 on the connecting pipe 3 is closed, and the upper tank is used to collect the special sewage. The special sewage in the lower tank no longer changes, and the special sewage in the lower tank can be sampled and tested, and the special sewage is discharged through the drain port at the bottom of the lower tank according to the test results. After the special sewage in the lower tank is discharged, the connecting valve 4 is opened and maintained, and the special sewage collected in the upper tank is transported to the lower tank, and the special sewage can continue to be collected by the lower tank. After the water volume in the lower tank reaches a set value (for example, 90% of the total volume of the lower tank), the connecting valve 4 on the connecting pipe 3 is closed, and the special sewage in the lower tank is sampled and tested, and the cycle is repeated, thereby realizing the collection, detection and discharge process of special sewage.

[0033] Because the collection, detection and discharge process of the special sewage water collection and discharge system of the present embodiment only uses one special sewage water tank 1, the occupied area of ​​the special sewage water collection and discharge system can be reduced; and the special sewage water enters the special sewage water tank 1 through the same water inlet. Compared with the prior art of controlling the entry channel of the special sewage water by controlling two different water inlet control valves, there is no need to operate the water inlet control valve, which can simplify the operating steps of the special sewage water collection and discharge system; during the use of the special sewage water collection and discharge system, the upper tank and the lower tank of the special sewage water tank 1 alternately collect the special sewage water, and the special sewage water tank 1 is always in use, thereby improving the utilization rate of the special sewage tank 1.

[0034] Therefore, the special sewage collection and discharge system in the embodiment of the present invention can separate the special sewage tank 1 into an upper tank and a lower tank that are independent of each other by arranging a partition plate 2 inside the special sewage tank 1. When the connecting valve 4 on the connecting pipe 3 is opened, the special sewage can enter the special sewage tank 1 through the upper tank and the connecting pipe 3 in sequence and enter the lower tank; after closing the connecting valve 4 on the connecting pipe 3, the upper tank can be used to collect the special sewage, and it is convenient to discharge the special sewage in the lower tank after testing. After the special sewage water in the lower trough is discharged, the connecting valve 4 can continue to be opened to use the lower trough to collect the special sewage water, and circulate it in this way, so that the upper trough and the lower trough in a special sewage trough 1 can be used to realize the collection, detection and discharge process of special sewage water, thereby reducing the occupied area of ​​the special sewage water collection and discharge system; and the special sewage water enters the special sewage trough 1 through the same water inlet. Compared with the prior art of controlling the entry channel of the special sewage water by controlling two different water inlet control valves, there is no need to operate the water inlet control valve, which can simplify the operating steps of the special sewage water collection and discharge system; during the use of the special sewage water collection and discharge system, the upper trough and the lower trough of the special sewage trough 1 alternately collect the special sewage water, and the special sewage trough 1 is always in use, thereby improving the utilization rate of the special sewage trough 1.

[0035] In some embodiments, Figure 2 As shown, the special water collection and discharge system also includes an overflow pipe 7. The overflow pipe 7 communicates with the top of the upper tank and the lower tank.

[0036] For example, the maximum volume of wastewater produced by the post-processing plant during the “interval time” is 10m 3 .

[0037] In special cases (such as accident conditions), the volume of special sewage discharged by the post-processing plant becomes larger. For example, in special cases, the volume of special sewage discharged by the post-processing plant during the "interval time" is 12m 3 At this time, using only a single upper tank cannot accommodate too much special sewage. Excess special sewage can enter the lower tank through the overflow pipe 7, so that the entire volume of the upper tank and the lower tank can be used to collect the special sewage, thereby improving the adaptability of the special sewage collection and discharge system to special situations.

[0038] In the second operation mode of the special sewage collection and discharge system, in the initial state, the connecting valve 4 is in a closed state, and the special sewage enters the special sewage tank 1 and is first stored in the upper tank. When the liquid level of the special sewage in the upper tank reaches a set value (for example, the liquid level when the amount of special sewage in the upper tank reaches 90% of the total volume of the upper tank), the connecting valve 4 is opened, and after the special sewage in the upper tank enters the lower tank, the connecting valve 4 is closed, and the upper tank continues to be used to collect the special sewage, and the special sewage in the lower tank is tested and discharged, and the cycle is repeated. It can be understood that at this time, the overflow pipe 7 can also allow the special sewage entering the special sewage tank 1 to enter the lower tank through the overflow pipe 7 when the liquid level of the special sewage in the upper tank reaches the set value and the connecting valve 4 cannot be opened normally.

[0039] In some embodiments, Figure 2 As shown, the water collection and discharge system further includes an exhaust pipe. The exhaust pipe includes a first exhaust pipe 8 and a second exhaust pipe 9. One end of the first exhaust pipe 8 is connected to the top of the upper tank, and the other end is located above the upper tank; one end of the second exhaust pipe 9 is connected to the top of the lower tank, and the other end is located above the upper tank.

[0040] The first exhaust pipe 8 can connect the interior of the upper tank with the external air, and can balance the internal air pressure of the upper tank with the external air pressure; the second exhaust pipe 9 can connect the interior of the lower tank with the external air, and can balance the internal air pressure of the lower tank with the external air pressure.

[0041] One end of the first exhaust pipe 8 is connected to the top of the upper trough to prevent the abnormal outflow of special water in the upper trough through the first exhaust pipe 8. One end of the second exhaust pipe 9 is connected to the top of the lower trough to prevent the abnormal outflow of special water in the lower trough through the second exhaust pipe 9.

[0042] Through the above arrangement, the air pressure inside the upper trough and the air pressure inside the lower trough can be balanced with the external air pressure, which is conducive to the smooth entry of special water into the upper trough and the lower trough.

[0043] In some embodiments, Figure 2 As shown, the special sewage collection and discharge system further includes a first liquid level meter 10. The first liquid level meter 10 is arranged in the lower tank and is used to detect the liquid level of the special sewage in the lower tank.

[0044] Exemplarily, after the amount of water in the lower tank reaches a set value (eg, 90% of the total volume of the lower tank), the first liquid level meter 10 may send an alarm signal to remind on-site staff to open the connecting valve 4 to discharge the excess water in the lower tank.

[0045] Through the above arrangement, it is convenient to obtain the liquid level of the special sewage in the lower tank, so that the on-site staff can control the opening and closing of the connecting valve 4 on the connecting pipe 3 according to the liquid level of the special sewage in the lower tank.

[0046] In some embodiments, the sewage collection and discharge system further includes a first controller. The first controller is electrically connected to the first liquid level meter 10 and the connecting valve 4, respectively, and is used to control the opening and closing of the connecting valve 4 according to the liquid level of the sewage in the lower tank detected by the first liquid level meter 10, so as to open the connecting valve 4 when the liquid level of the sewage in the lower tank reaches a first liquid level, and close the connecting valve 4 when the liquid level of the sewage in the lower tank reaches a second liquid level.

[0047] Exemplarily, the first controller may be a general programmable logic controller, which can process input information and output corresponding control signals.

[0048] Exemplarily, the first liquid level meter 10 can output different detection signals at different liquid levels. After receiving the detection signals, the first controller outputs corresponding control signals to the connecting valve 4 according to the different detection signals to control the opening and closing of the connecting valve 4.

[0049] Exemplarily, the first liquid level is the low liquid level of the special sewage in the lower tank (for example, the liquid level after all the special sewage in the lower tank is discharged). At this time, opening the connecting valve 4 can allow the special sewage to enter the lower tank, so that the lower tank can be used to collect the special sewage.

[0050] The above-mentioned second liquid level is the high liquid level of the special sewage in the lower tank (for example, the liquid level when the amount of special sewage in the lower tank reaches 90% of the total volume of the lower tank). At this time, closing the connecting valve 4 can stop the special sewage from entering the lower tank, so that the upper tank can be used to collect the special sewage, and it is convenient to sample and detect the special sewage in the lower tank.

[0051] Through the above arrangement, the first controller can automatically control the opening and closing of the connecting valve 4 according to the liquid level detected by the first liquid level meter 10, thereby realizing automatic control of the connecting valve 4.

[0052] In some embodiments, Figure 2As shown, the special sewage collection and discharge system also includes a second liquid level meter 11. The second liquid level meter 11 is arranged in the upper tank and is used to detect the liquid level of the special sewage in the upper tank.

[0053] Exemplarily, the first liquid level meter 10 and the second liquid level meter 11 may be separate liquid level meters, or may be the same liquid level meter with a multi-point measurement function.

[0054] Illustratively, in the operation mode of the second special sewage collection and discharge system, when the liquid level of the special sewage in the upper tank reaches a set value (for example, the liquid level when the amount of special sewage in the upper tank reaches 90% of the total volume of the upper tank), the second liquid level meter 11 sends an alarm signal to remind on-site staff to open the connecting valve 4 to allow the special sewage in the upper tank to flow into the lower tank.

[0055] Through the above arrangement, it is convenient to obtain the liquid level of the special drainage water in the upper tank, so that the on-site staff can control the opening and closing of the connecting valve 4 on the connecting pipe 3 according to the liquid level of the special drainage water in the upper tank.

[0056] In some embodiments, the drainage collection and discharge system further includes a second controller. The second controller is electrically connected to the first liquid level meter 10, the second liquid level meter 11 and the connecting valve 4, respectively, and is used to control the opening and closing of the connecting valve 4 according to the liquid level of the drainage in the lower tank detected by the first liquid level meter 10 and the liquid level of the drainage in the upper tank detected by the second liquid level meter 11, so as to open the connecting valve 4 when the liquid level of the drainage in the upper tank reaches the third liquid level, so that the drainage in the upper tank flows into the lower tank, and close the connecting valve 4 when the liquid level in the lower tank reaches the second liquid level.

[0057] Exemplarily, the second controller may be a general programmable logic controller.

[0058] The first liquid level meter 10 and the second liquid level meter 11 can output different detection signals at different liquid levels. After receiving the above detection signals, the first controller outputs different control signals to the connecting valve 4 according to the different detection signals to control the opening and closing of the connecting valve 4.

[0059] Exemplarily, the third liquid level is the high liquid level of the special sewage in the upper tank (for example, the liquid level when the amount of special sewage in the upper tank reaches 90% of the total volume of the upper tank). At this time, opening the connecting valve 4 can allow the special sewage to enter the lower tank, so as to sample, detect and discharge the special sewage entering the lower tank.

[0060] The above-mentioned second liquid level is the high liquid level of the special sewage in the lower tank (for example, the liquid level when the amount of special sewage in the upper tank reaches 90% of the total volume of the upper tank). At this time, closing the connecting valve 4 can stop the special sewage from entering the lower tank, so that the upper tank can be used to collect the special sewage, and the special sewage in the lower tank can be sampled and tested.

[0061] Through the second controller, the opening and closing of the connecting valve 4 can be automatically controlled according to the liquid levels detected by the first liquid level gauge 10 and the second liquid level gauge 11, thereby realizing automatic control of the connecting valve 4.

[0062] In some embodiments, Figure 2 As shown, the special sewage collection and discharge system also includes a main water outlet pipe 6. The water inlet of the main water outlet pipe 6 is connected to the drain outlet of the lower tank, and a drainage pump 14 is provided on the main water outlet pipe 6. The first controller / second controller is also electrically connected to the drainage pump 14, and is also used to control the closing of the drainage pump 14 according to the liquid level of the special sewage in the lower tank detected by the first liquid level meter 10, so as to close the drainage pump 14 when the liquid level in the lower tank reaches the first liquid level.

[0063] Exemplarily, the parameters of the drainage pump 14 can be determined according to factors such as the volume of the lower tank, the size of the main water outlet pipe 6, etc., so that the drainage pump 14 can discharge the extra drainage in the lower tank in a shorter time.

[0064] As described above, the first liquid level is the low liquid level of the special lower water in the lower tank (for example, the liquid level after all the special lower water in the lower tank has been drained).

[0065] After sampling and testing of the special water in the lower tank is completed, the drainage pump 14 is turned on to discharge the special water in the lower tank. When the liquid level in the lower tank reaches the first liquid level, that is, after all the special water in the lower tank is discharged, the first controller / the second controller can turn off the drainage pump 14 in time.

[0066] Through the above arrangement, the closing of the drainage pump 14 can be automatically controlled according to the liquid level of the drainage water in the lower tank detected by the first liquid level meter 10, thereby realizing linkage control of the drainage pump 14.

[0067] In some embodiments, Figure 2 As shown, a sampling valve 13 is led out from the main water outlet pipe 6 , and the sampling valve 13 is arranged on a side of the drainage pump 14 close to the lower tank. The sampling valve 13 can be used to sample the special drainage water in the lower tank.

[0068] The above arrangement makes it convenient for the staff to take samples of the special sewage in the lower tank.

[0069] In some embodiments, Figure 2 As shown, the drainage collection and discharge system further includes a standby pump 12, which is connected in parallel to both ends of the drainage pump 14. The first controller / second controller is also electrically connected to the standby pump 12, and is also used to control the shutdown of the standby pump 12 according to the liquid level of the drainage in the lower tank detected by the first liquid level meter 10 when the drainage pump 14 fails, so as to shut down the standby pump 12 when the liquid level in the lower tank reaches the first liquid level.

[0070] Exemplarily, the parameters of the standby pump 12 are the same as those of the drainage pump 14. When the drainage pump 14 fails, the standby pump 12 can be switched to work to ensure the normal drainage function of the sewage collection and drainage system.

[0071] Through the above arrangement, the stability of the sewage collection and discharge system can be improved, and the linkage control of the standby pump 12 can be realized at the same time.

[0072] In some embodiments, Figure 2 As shown, the special sewage collection and discharge system also includes a first water outlet pipe 15 and a second water outlet pipe 16. The water inlet of the first water outlet pipe 15 and the water inlet of the second water outlet pipe 16 are both connected to the water outlet of the main water outlet pipe 6, and the first water outlet pipe 15 is provided with a first discharge valve, and the second water outlet pipe 16 is provided with a second discharge valve.

[0073] Exemplarily, the first outlet pipe 15 is a drainage pipe for excessive-standard sewage, and the second outlet pipe 16 is a drainage pipe for non-excessive-standard sewage.

[0074] Generally speaking, the radioactivity level of low-level waste liquid is required to be less than or equal to 4×10 6 Bq / L.

[0075] The radioactivity level detected in the lower tank water exceeds the preset standard (e.g. 4×10 6 Bq / L), open the first discharge valve on the first outlet pipe 15, so that the special sewage in the lower tank is discharged from the first outlet pipe 15 to the relevant treatment facilities and disposal facilities.

[0076] The radioactivity level of the water in the lower tank did not exceed the preset standard (e.g. 4×10 6 Bq / L), open the second discharge valve on the second outlet pipe 16 to discharge the special lower water in the lower tank from the second outlet pipe 16 to the final environmental receptor.

[0077] Through the above arrangement, the special sewage can be discharged through different drainage pipes according to the detection results, so as to treat different special sewage respectively, improve the specificity of the special sewage treatment, and reduce the impact on the final environmental receptors.

[0078] Embodiment 2:

[0079] The embodiment of the present invention further provides a method for collecting and discharging special sewage, which is implemented based on the special sewage collection and discharge system in Example 1, and includes: S10-S40.

[0080] S10, open the connecting valve 4, so that the special lower water entering the special lower water tank 1 flows into the lower tank through the connecting pipe 3.

[0081] S20, close the connecting valve 4, stop collecting the special sewage in the lower tank, and use the upper tank of the special sewage tank 1 to collect the special sewage.

[0082] S30, detecting the radioactivity level of the special sewage in the lower tank, and discharging the special sewage in the lower tank.

[0083] S40, repeat steps S10-S30 in sequence and loop.

[0084] Thus, the collection, detection and discharge process of special sewage can be realized through a special sewage tank 1, which is conducive to reducing the occupied area of ​​the special sewage collection and discharge system; and while detecting the special sewage in the lower tank, the upper tank of the same special sewage tank 1 can be used to collect the special sewage, so that the special sewage tank 1 is always in use, which improves the utilization rate of the special sewage tank 1. The above steps only need to operate the opening and closing of the connecting valve 4. Compared with the prior art, there is no need to operate the water inlet control valve, which simplifies the collection and discharge method of special sewage.

[0085] In some embodiments, in the above S10, opening the connecting valve 4 specifically includes: after the connecting valve 4 is closed, when the liquid level of the lower water in the lower tank drops to the first liquid level, opening the connecting valve 4.

[0086] Exemplarily, as described above, the first liquid level is the low liquid level of the special lower water in the lower tank (for example, all the special lower water in the lower tank is discharged at this time).

[0087] That is, in this embodiment, after all the special sewage in the lower tank is discharged, the connecting valve 4 is immediately opened, and the special sewage entering the special sewage tank 1 passes through the upper tank and the connecting pipe 3 in sequence and enters the lower tank, that is, the lower tank is first used to collect the special sewage, corresponding to the operation mode of the first special sewage collection and discharge system mentioned above. After the special sewage in the lower tank reaches the preset water volume, the connecting valve 4 is closed, and then the upper tank of the special sewage tank 1 is used to collect the special sewage, and the special sewage in the lower tank is tested and then discharged.

[0088] In other embodiments, after the connecting valve 4 is closed, the lower water entering the lower water tank 1 is allowed to enter the upper tank first, and when the liquid level of the lower water in the upper tank rises to the third liquid level, the connecting valve 4 is opened.

[0089] Exemplarily, the third liquid level is a high liquid level of the special drain water in the upper tank (for example, the amount of the special drain water in the upper tank reaches 90% of the total volume of the upper tank at this time).

[0090] That is, in this embodiment, the connecting valve 4 is initially in a closed state, and the upper tank is first used to collect the special sewage, corresponding to the operation mode of the second special sewage collection and discharge system described above. When the liquid level of the special sewage in the upper tank rises to the third liquid level, the connecting valve 4 is opened to allow the special sewage in the upper tank to flow into the lower tank, and then the connecting valve 4 is closed to continue to use the upper tank to collect the special sewage.

[0091] In some embodiments, in the above S20, closing the connecting valve 4 specifically includes: when the liquid level of the lower water in the lower tank rises to the second liquid level, closing the connecting valve 4.

[0092] Exemplarily, the second liquid level is the high liquid level of the special sewage in the lower tank (for example, the amount of special sewage in the lower tank reaches 90% of the total volume of the lower tank). At this time, closing the connecting valve 4 can stop the special sewage from entering the lower tank, so that the upper tank can be used to collect the special sewage, and the special sewage in the lower tank can be sampled and tested.

[0093] Therefore, more special sewage can be collected in the lower trough and then sampled, tested and discharged, which can increase the "interval time" and thus reduce the number of sampling times and simplify the operating steps of the special sewage collection and discharge system.

[0094] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A special sewage collection and discharge system, characterized in that: include: A special lower water tank (1) is provided with a partition (2) inside, and the partition (2) separates the special lower water tank (1) into an upper tank and a lower tank which are independent of each other; a water inlet is provided at the top of the upper tank, and a water outlet is provided at the bottom of the lower tank; a connecting pipe (3) connecting the bottom of the upper tank and the lower tank; and, A connecting valve (4) is arranged on the connecting pipe (3) and is used to control the opening and closing of the connecting pipe (3).

2. The sewage collection and discharge system according to claim 1 is characterized in that: Also includes an overflow pipe (7); The overflow pipe (7) is connected to the top of the upper tank and the lower tank.

3. The sewage collection and discharge system according to claim 1 is characterized in that: Also includes exhaust pipe; The exhaust pipe comprises a first exhaust pipe (8) and a second exhaust pipe (9); one end of the first exhaust pipe (8) is connected to the top of the upper groove, and the other end is located above the upper groove; one end of the second exhaust pipe (9) is connected to the top of the lower groove, and the other end is located above the upper groove.

4. The sewage collection and discharge system according to claim 1, characterized in that: Also includes a first liquid level meter (10); The first liquid level meter (10) is arranged in the lower tank and is used to detect the liquid level of the lower water in the lower tank.

5. The sewage collection and discharge system according to claim 4 is characterized in that: Also included is a first controller; The first controller is electrically connected to the first liquid level meter (10) and the connecting valve (4) respectively, and is used to control the opening and closing of the connecting valve (4) according to the liquid level of the special lower water in the lower tank detected by the first liquid level meter (10), so as to open the connecting valve (4) when the liquid level of the special lower water in the lower tank reaches a first liquid level, and to close the connecting valve (4) when the liquid level of the special lower water in the lower tank reaches a second liquid level.

6. The sewage collection and discharge system according to claim 4, characterized in that: Also includes a second liquid level meter (11); The second liquid level meter (11) is arranged in the upper tank and is used to detect the liquid level of the water in the upper tank.

7. The sewage collection and discharge system according to claim 6 is characterized in that: Also included is a second controller; The second controller is electrically connected to the first liquid level meter (10), the second liquid level meter (11) and the connecting valve (4) respectively, and is used to control the opening and closing of the connecting valve (4) according to the liquid level of the lower water in the lower tank detected by the first liquid level meter (10) and the liquid level of the lower water in the upper tank detected by the second liquid level meter (11), so as to open the connecting valve (4) when the liquid level of the lower water in the upper tank reaches a third liquid level, so that the lower water in the upper tank flows into the lower tank, and close the connecting valve (4) when the liquid level in the lower tank reaches a second liquid level.

8. The sewage collection and discharge system according to claim 5 or 7, characterized in that: It also includes a main water outlet pipe (6); The water inlet of the main water outlet pipe (6) is connected to the drain outlet of the lower tank, and a drain pump (14) is provided on the main water outlet pipe (6); The first controller / the second controller is also electrically connected to the drainage pump (14), and is also used to control the closing of the drainage pump (14) according to the liquid level of the drainage water in the lower tank detected by the first liquid level meter (10), so as to close the drainage pump (14) when the liquid level in the lower tank reaches the first liquid level.

9. The sewage collection and discharge system according to claim 8, characterized in that: A sampling valve (13) is led out from the main water outlet pipe (6), and the sampling valve (13) is arranged on a side of the drainage pump (14) close to the lower tank. The special drainage water in the lower tank can be sampled through the sampling valve (13).

10. The sewage collection and discharge system according to claim 8, characterized in that: It also includes a backup pump (12), wherein the backup pump (12) is connected in parallel to both ends of the drainage pump (14); The first controller / the second controller is also electrically connected to the standby pump (12), and is also used to control the shutdown of the standby pump (12) based on the liquid level of the drainage water in the lower tank detected by the first liquid level meter (10) when the drainage pump (14) fails, so as to shut down the standby pump (12) when the liquid level in the lower tank reaches the first liquid level.

11. The sewage collection and discharge system according to claim 8, characterized in that: It also comprises a first water outlet pipe (15) and a second water outlet pipe (16); the water inlet of the first water outlet pipe (15) and the water inlet of the second water outlet pipe (16) are both connected to the water outlet of the main water outlet pipe (6); the first water outlet pipe (15) is provided with a first discharge valve, and the second water outlet pipe (16) is provided with a second discharge valve.

12. A method for collecting and discharging special sewage, the method being implemented based on the special sewage collection and discharge system according to any one of claims 1 to 11, characterized in that: The method comprises: S10-S40; S10, opening the connecting valve (4) to allow the special lower water entering the special lower water tank (1) to flow into the lower tank through the connecting pipe (3); S20, closing the connecting valve (4), the lower tank stops collecting the special lower water, and the upper tank of the special lower water tank (1) is used to collect the special lower water; S30, detecting the radioactivity level of the special sewage in the lower tank, and discharging the special sewage in the lower tank; S40, repeat steps S10-S30 in sequence and loop.

13. The method for collecting and discharging special sewage according to claim 12, characterized in that: In S10, the opening of the connecting valve (4) is specifically: After the connecting valve (4) is closed, when the liquid level of the lower water in the lower tank drops to a first liquid level, the connecting valve (4) is opened; or, After the connecting valve (4) is closed, the lower water entering the lower water tank (1) first enters the upper tank, and when the liquid level of the lower water in the upper tank rises to the third liquid level, the connecting valve (4) is opened.

14. The method for collecting and discharging special sewage according to claim 12, characterized in that: In the above S20, the closing of the connecting valve (4) is specifically: when the liquid level of the lower water in the lower tank rises to the second liquid level, the connecting valve (4) is closed.

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