Rapid treatment equipment for radioactive nuclear medicine wastewater

Abstract

The invention discloses rapid treatment equipment for radioactive nuclear medicine wastewater, and belongs to the technical field of radioactive wastewater treatment. Comprising a settling device, a filtering device, a main adsorption device and a liquid storage tank which are sequentially communicated, the settling device is used for settling suspended matter impurities in the wastewater; the filtering device is used for removing solid particles in the wastewater; the first adsorption unit and the second adsorption unit which are matched in parallel are arranged, the first adsorption assembly and the second adsorption assembly which are connected in series are arranged in the first adsorption unit, and the third adsorption assembly and the fourth adsorption assembly which are connected in series are arranged in the second adsorption unit; the first adsorption unit and the second adsorption unit can work alternately, and the treatment window period of radioactive nuclear medicine wastewater is shortened, so that the treatment efficiency is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of radioactive wastewater treatment, in particular to a rapid treatment equipment for radioactive nuclear medicine wastewater. BACKGROUND

[0002] Nuclear medicine is a discipline that uses radionuclides or rays for disease diagnosis and targeted treatment. It plays an important role in the diagnosis and treatment of key areas such as tumors, cardiovascular diseases and skeletal diseases, and is a key component of modern medical systems. With the development of nuclear medicine, the use of medical radionuclides has gradually increased, and the amount of medical radioactive wastewater has also increased. The methods of radioactive wastewater treatment mainly include chemical precipitation, ion adsorption, electrodialysis, membrane treatment technology, and evaporation, among which the ion adsorption method is more commonly used and has low cost.

[0003] However, the equipment in the prior art has exposed many problems in actual operation: the working period of the ion exchange resin is short, and the amount of resin consumed per unit volume of wastewater is much higher than the theoretical value; the evaporation energy consumption is high, the investment and operation cost is also high, the system is complex, and the operation and maintenance requirements are also high. The above problems ultimately lead to a significant increase in workload, which not only increases additional costs, but also is not conducive to environmental protection.

[0004] In order to solve the above problems, the present application provides a rapid treatment equipment for radioactive nuclear medicine wastewater, which solves the technical problem of low treatment efficiency of radioactive nuclear medicine wastewater in the prior art. SUMMARY

[0005] The present application provides a rapid treatment equipment for radioactive nuclear medicine wastewater to solve the technical problem of low treatment efficiency of radioactive nuclear medicine wastewater in the prior art.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is: The present application provides a rapid treatment equipment for radioactive nuclear medicine wastewater, which comprises a sedimentation device, a filtration device, a main adsorption device and a liquid storage tank connected in sequence; The sedimentation device comprises a liquid inlet and a liquid outlet, and is used for precipitating suspended impurities in the wastewater; The liquid inlet of the filtration device is communicated with the liquid outlet of the sedimentation device, and the filtration device is used for removing solid particles in the wastewater; The main adsorption device is communicated with the filter device, the main adsorption device comprises a first adsorption unit and a second adsorption unit which are connected in parallel, the first adsorption unit comprises a first adsorption assembly and a second adsorption assembly which are connected in series, and the second adsorption unit comprises a third adsorption assembly and a fourth adsorption assembly which are connected in series; the liquid outlet of the first adsorption unit and the liquid outlet of the second adsorption unit are both communicated with the liquid storage tank. The liquid storage tank is provided with a liquid discharge port.

[0007] Further, a secondary adsorption device is further included, and the secondary adsorption device is connected in series with the liquid storage tank.

[0008] Further, a main peristaltic pump is further connected between the main adsorption device and the filter device, a liquid inlet of the main peristaltic pump is communicated with a liquid outlet of the filter device, and a liquid outlet of the main peristaltic pump is communicated with a liquid inlet of the adsorption device; a secondary peristaltic pump is further connected between the secondary adsorption device and the liquid storage tank, a liquid inlet of the secondary peristaltic pump is communicated with a liquid outlet of the secondary adsorption device, and a liquid outlet of the secondary peristaltic pump is communicated with the liquid storage tank.

[0009] Further, a three-way valve is further connected between the main peristaltic pump and the main adsorption device, a liquid inlet of the three-way valve is communicated with a liquid outlet of the main peristaltic pump, a first liquid outlet of the three-way valve is communicated with a liquid inlet of the first adsorption unit, and a second liquid outlet of the three-way valve is communicated with a liquid inlet of the second adsorption unit.

[0010] Further, a first valve is connected between a liquid outlet of the first adsorption assembly and a liquid inlet of the second adsorption assembly; a second valve is connected between a liquid outlet of the third adsorption assembly and a liquid inlet of the fourth adsorption assembly; a third valve is connected between a liquid outlet of the second adsorption assembly and the liquid storage tank, and a fourth valve is connected between a liquid outlet of the fourth adsorption assembly and the liquid storage tank; the secondary adsorption device comprises a specific adsorption assembly, and a sixth valve is connected between a liquid inlet of the specific adsorption assembly and a liquid outlet of the liquid storage tank.

[0011] Further, a flow meter is installed at a liquid outlet of the main adsorption device, and an electric conductivity meter is installed at the liquid storage tank.

[0012] Further, the filter device is provided with a detachable filter screen, so that the filter screen can be quickly replaced.

[0013] Further, a liquid leakage monitoring system is arranged in the rapid processing equipment, the liquid leakage monitoring system comprises a liquid leakage prevention monitoring meter and an alarm device, the liquid leakage prevention monitoring meter is located in the rapid processing equipment, and the alarm device is started synchronously after the liquid leakage prevention monitoring meter is triggered.

[0014] Further, the first adsorption assembly, the second adsorption assembly, the third adsorption assembly, the fourth adsorption assembly and the specific adsorption assembly are internally provided with detachable adsorption columns.

[0015] Further, the liquid outlet of the liquid storage tank is connected with the domestic sewage system.

[0016] Compared with the prior art, the technical scheme disclosed by the application has the following beneficial effects: Due to the above scheme, by arranging the first adsorption unit and the second adsorption unit in parallel cooperation, arranging the first adsorption unit with the first adsorption assembly and the second adsorption assembly connected with each other and arranging the second adsorption unit with the third adsorption assembly and the fourth adsorption assembly connected with each other, the first adsorption unit and the second adsorption unit can alternately work, the processing empty window period of the radioactive nuclear medical wastewater is reduced, and thus the processing efficiency is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 It is a structure schematic view of the rapid processing equipment for radioactive nuclear medical wastewater in the embodiment 1 of the application. Figure 2 It is a curve graph of the conductivity and the exchange liquid column volume in the embodiment 2 of the application. Figure 3 It is a structure schematic view of the rapid processing equipment for radioactive nuclear medical wastewater in the embodiment 3 of the application.

[0019] 1, radioactive nuclear medical wastewater; 2, settling device; 3, filtering device; 4, liquid storage tank; 5, main peristaltic pump; 6, first adsorption unit; 61, first adsorption assembly; 62, second adsorption assembly; 7, second adsorption unit; 71, third adsorption assembly; 72, fourth adsorption assembly; 8, domestic sewage system; 9, three-way valve; 10, first valve; 11, second valve; 12, third valve; 13, fourth valve; 14, flow meter; 15, conductivity meter; 16, fifth valve; 17, specific adsorption assembly; 18, secondary peristaltic pump; 19, sixth valve. DETAILED DESCRIPTION

[0020] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] The present application provides a kind of for quick processing equipment of radioactive nuclear medicine wastewater, to solve the technical problem of low efficiency in prior art for radioactive nuclear medicine wastewater 1 processing.

[0023] Reference Figure 1 , the present application embodiment 1 disclosed a kind of for quick processing equipment of radioactive nuclear medicine wastewater, including the communication of sedimentation device 2, filter device 3, main adsorption device and liquid storage tank 4 in turn;Sedimentation device 2 includes inlet and outlet, and sedimentation device 2 is used to make suspended impurities in wastewater precipitate;The inlet of filter device 3 is communicated with the outlet of sedimentation device 2, and filter device 3 is used to remove solid particles in wastewater;Main adsorption device is communicated with filter device 3, and main adsorption device includes first adsorption unit 6 and second adsorption unit 7 which are connected in parallel, first adsorption unit 6 includes first adsorption assembly 61 and second adsorption assembly 62 which are connected in series, and second adsorption unit 7 includes third adsorption assembly 71 and fourth adsorption assembly 72 which are connected in series;The outlet of first adsorption unit 6 and the outlet of second adsorption unit 7 are both communicated with liquid storage tank 4;Liquid storage tank 4 is provided with liquid outlet, and the liquid outlet of liquid storage tank 4 is connected with domestic sewage system 8.

[0024] Among them, the radioactive nuclear medicine wastewater 1 to be processed is first precipitated suspended impurities in sedimentation device 2, and the wastewater treated by sedimentation device 2 enters filter device 3 to remove solid particles in wastewater, and then the wastewater after precipitation and filtration enters main adsorption device to adsorb and treat radioactive ions in wastewater;Because first adsorption unit 6 and second adsorption unit 7 are in parallel cooperation, during wastewater treatment, two adsorption units can be opened simultaneously for radioactive ion adsorption operation, or one adsorption unit can be opened for radioactive ion adsorption operation, and when one adsorption unit is used for radioactive ion adsorption operation, the other adsorption unit can be used for radioactive element decay treatment, so as to realize the mode of first adsorption unit 6 and second adsorption unit 7 alternating operation, so as to realize uninterrupted radioactive medical wastewater treatment operation, and when the liquid amount in liquid storage tank 4 reaches the standard, it is discharged to domestic sewage system 8.

[0025] The main peristaltic pump 5 is connected between the adsorption device and the filtering device 3, the inlet of the main peristaltic pump 5 is communicated with the outlet of the filtering device 3, and the outlet of the main peristaltic pump 5 is communicated with the inlet of the adsorption device; the main peristaltic pump 5 is used to provide power for the system, and the flow of the wastewater is convenient to control.

[0026] The three-way valve 9 is further connected between the main peristaltic pump 5 and the adsorption device, the inlet of the three-way valve 9 is communicated with the outlet of the main peristaltic pump 5, the first outlet of the three-way valve 9 is communicated with the inlet of the first adsorption unit 6, and the second outlet of the three-way valve 9 is communicated with the inlet of the second adsorption unit 7; the three-way valve 9 is an electronic control valve, when one of the adsorption units reaches the designed flow or the conductivity of the effluent exceeds the specified value, the switching of the adsorption units can be realized through the electronic control valve.

[0027] The first valve 10 is connected between the outlet of the first adsorption assembly 61 and the inlet of the second adsorption assembly 62, the second valve 11 is connected between the outlet of the third adsorption assembly 71 and the inlet of the fourth adsorption assembly 72, the third valve 12 is connected between the outlet of the second adsorption assembly 62 and the liquid storage tank 4, and the fourth valve 13 is connected between the outlet of the fourth adsorption assembly 72 and the liquid storage tank 4; the first valve 10 is used to control the on-off between the outlet of the first adsorption assembly 61 and the second adsorption assembly 62, the second valve 11 is used to control the on-off between the outlet of the third adsorption assembly 71 and the fourth adsorption assembly 72, the third valve 12 is used to control the on-off between the second adsorption assembly 62 and the liquid storage tank 4, and the fourth valve 13 is used to control the on-off between the fourth adsorption assembly 72 and the liquid storage tank 4; the fifth valve 16 is further connected between the liquid storage tank 4 and the domestic sewage system 8.

[0028] The flow meter 14 is installed at the outlet of the adsorption device, the conductivity meter 15 is installed at the outlet of the adsorption device, and the liquid leakage monitoring system is arranged in the rapid treatment equipment; the liquid leakage monitoring system comprises a liquid leakage monitoring meter and an alarm device, the liquid leakage monitoring meter is located in the rapid treatment equipment, and the alarm device is started synchronously after the liquid leakage monitoring meter is triggered; the flow meter 14, the conductivity meter 15 and the liquid leakage monitoring meter form a treatment system, the treatment system realizes automatic control of the system through data collection of the flow meter 14, the conductivity meter 15 and the liquid leakage monitoring meter, and manages the running states of each actuator of the system; once it is detected that the water treatment capacity of the adsorption unit exceeds the designed value or the conductivity of the effluent exceeds 1 μS / cm, the adsorption unit is switched immediately, and an alarm message is sent; when the liquid leakage monitoring meter detects that there is liquid leakage in the system, the main peristaltic pump 5 is immediately controlled to stop running, all valves are closed, and an alarm message is sent to remind the relevant personnel to repair.

[0029] The filtering device 3 of the embodiment is provided with detachable filter screens for quick replacement of the filter screens.

[0030] The first adsorption assembly 61, the second adsorption assembly 62, the third adsorption assembly 71 and the fourth adsorption assembly 72 are each provided with a detachable adsorption column. When the conductivity of the effluent of the adsorption assembly is too high or the design flow is reached, the maintenance can be completed by replacing the faulty adsorption column as needed. The column body can also be replaced to adapt to medical radioactive wastewater of different compositions according to actual use needs.

[0031] In the embodiment 2, the treatment and breakthrough experiment of the simulated radioactive medical wastewater are performed in the following steps: Step 1: Lu(NO3)3·6H2O, KI, NH4ReO4 and KF are used to configure Lu 3+ concentration of 10 ppm, I- concentration of 100 ppm, ReO 4- concentration of 100 ppm and F - concentration of 50 ppm of the simulated radioactive medical wastewater.

[0032] Step 2: The adsorption column is installed in the adsorption assembly, and the volume of the adsorption column is 10 cm 3 .

[0033] Step 3: The flow rate of the main peristaltic pump 5 is adjusted to 2.5 mL / min, the simulated radioactive medical wastewater configured in step 1 is passed through the assembly through the main peristaltic pump 5, and the eluent passing through the adsorption column is collected in a tube every 5 mL.

[0034] Step 4: The conductivity of the eluent is measured by using the conductivity meter 15, and the curve of the measured conductivity and the volume of the eluent column is as shown in Figure 2 .

[0035] Step 5: The ion concentration is measured by using ICP-OES and a fluorine ion electrode, and the ion concentration after purification and the removal rate are as shown in Table 1.

[0036] For this embodiment, the conductivity of the simulated radioactive medical wastewater configured in step 1 is purified from 450 μS / cm to below 1.000 μS / cm, and stable operation is performed for 60 times of column volume. ICP-OES measurement shows that Lu 3+ , ReO 4- , I - have been completely removed, and the removal rates are 99.82%, 99.97% and 99.99%, respectively. After that, the conductivity is increased to above 1.000 μS / cm, and ICP-OES measurement shows that Lu 3+Start to flow out; when 90 times of column volume, the conductivity of effluent exceeds 10 μS / cm, reaches the conductivity of national standard drinking pure water, other ions flow out, when 116 times of column volume, completely penetrates, the conductivity of effluent exceeds 450 μS / cm of the prepared simulated radioactive medical wastewater.

[0037] Table 1 Wherein, ICP-OES is a high-precision analysis technology for detecting the types and contents of metal elements in the sample.

[0038] Reference Figure 3 The application discloses a kind of fast processing equipment for radioactive nuclear medicine wastewater in the embodiment 3 of the application, still include secondary adsorption device, wherein secondary adsorption device is connected with liquid storage tank 4 in series, and secondary adsorption device is also connected with liquid storage tank 4 between secondary peristaltic pump 18, the liquid inlet of secondary peristaltic pump 18 is communicated with the liquid outlet of secondary adsorption device, the liquid outlet of secondary peristaltic pump 18 is communicated with liquid storage tank 4;Secondary adsorption device includes specific adsorption component 17, the liquid inlet of specific adsorption component 17 is connected with the liquid outlet of liquid storage tank 4 between sixth valve 19, detachable adsorption column installed inside specific adsorption component 17 is specific adsorption column for adsorption of iodine ion and fluorine ion, liquid storage tank 4 is also provided with iodine ion selective electrode and fluorine ion selective electrode, for monitoring the ion concentration of I - And F - In liquid storage tank 4;Wherein the second liquid outlet of liquid storage tank 4 is communicated with the liquid inlet of specific adsorption component 17, the liquid outlet of specific adsorption component 17 is communicated with the liquid inlet of liquid storage tank 4;When the conductivity of effluent exceeds 1 μS / cm, or the ion concentration of I - , F - Exceeds 0.1 mg / L, send warning message, and close third valve 12, fourth valve 13, fifth valve 16 and main peristaltic pump 5, open sixth valve 19 and secondary peristaltic pump 18, so that liquid storage tank 4 and specific adsorption component 17 form small circulation, and I - And F - In liquid storage tank 4 are adsorbed by specific adsorption column;When the reading of conductivity instrument 15 drops to 0.5 μS / cm, and the ion concentration of I - And F - Is less than 0.05 mg / L, reopen third valve 12, fourth valve 13 and fifth valve 16, and close sixth valve 19 and secondary peristaltic pump 18, continue to process radioactive nuclear medicine wastewater.

[0039] It is to be understood that the present application is not limited to the details of the above-exemplified embodiments and can be implemented in various other forms without departing from the spirit or essential characteristics of the application. Consequently, any exemplary embodiment is to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein and are meant to be covered by the following claims.

Claims

1. A rapid treatment device for radioactive nuclear medicine wastewater, characterized in that, It includes a sedimentation device, a filtration device, a main adsorption device, and a storage tank connected in sequence; The settling device includes an inlet and an outlet, and is used to settle suspended solids and impurities in wastewater. The inlet of the filtration device is connected to the outlet of the sedimentation device, and the filtration device is used to remove solid particles from the wastewater. The main adsorption device is connected to the filtration device. The main adsorption device includes a first adsorption unit and a second adsorption unit connected in parallel. The first adsorption unit includes a first adsorption component and a second adsorption component connected in series. The second adsorption unit includes a third adsorption component and a fourth adsorption component connected in series. The liquid outlets of the first adsorption unit and the second adsorption unit are both connected to the storage tank. The storage tank is equipped with a drain port.

2. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 1, characterized in that, It also includes a secondary adsorption device, which is connected in series with the storage tank.

3. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 1, characterized in that, A main peristaltic pump is also connected between the main adsorption device and the filter device. The inlet of the main peristaltic pump is connected to the outlet of the filter device, and the outlet of the main peristaltic pump is connected to the inlet of the adsorption device. A secondary peristaltic pump is also connected between the secondary adsorption device and the storage tank. The inlet of the secondary peristaltic pump is connected to the outlet of the secondary adsorption device, and the outlet of the secondary peristaltic pump is connected to the storage tank.

4. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 3, characterized in that, A three-way valve is also connected between the main peristaltic pump and the main adsorption device. The inlet of the three-way valve is connected to the outlet of the main peristaltic pump, the first outlet of the three-way valve is connected to the inlet of the first adsorption unit, and the second outlet of the three-way valve is connected to the inlet of the second adsorption unit.

5. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 2, characterized in that, A first valve connects the outlet of the first adsorption component to the inlet of the second adsorption component; a second valve connects the outlet of the third adsorption component to the inlet of the fourth adsorption component; a third valve connects the outlet of the second adsorption component to the storage tank; and a fourth valve connects the outlet of the fourth adsorption component to the storage tank. The secondary adsorption device includes a specific adsorption component, and a sixth valve connects the inlet of the specific adsorption component to the outlet of the storage tank.

6. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 1, characterized in that, A flow meter is installed at the outlet of the main adsorption device, and a conductivity meter is installed in the storage tank.

7. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 1, characterized in that, The filtration device is equipped with a removable filter screen for quick replacement.

8. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 1, characterized in that, The rapid processing equipment is equipped with a leakage monitoring system, which includes a leakage detector and an alarm device. The leakage detector is located inside the rapid processing equipment, and the alarm device will be activated simultaneously when the leakage detector is triggered.

9. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 1, characterized in that, Each of the No. 1 adsorption component, the No. 2 adsorption component, the No. 3 adsorption component, the No. 4 adsorption component, and the specific adsorption component is equipped with a detachable adsorption column.

10. The rapid treatment equipment for radioactive nuclear medicine wastewater according to claim 1, characterized in that, The drain outlet of the storage tank is connected to the domestic sewage system.

Images