CN112786229B - Radioactive wastewater treatment method and system - Google Patents
Radioactive wastewater treatment method and system Download PDFInfo
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Abstract
The application relates to a radioactive wastewater treatment method, which comprises the steps of discharging homogenized wastewater into a decay tank, recording the initial radioactive concentration of the wastewater before the beginning of decay, timing the decay time, detecting the radioactive concentration of the wastewater in the decay tank until the radioactive concentration of the wastewater is lower than a discharge standard value in the decay process, obtaining the time required by the decay, and discharging the wastewater; the initial radioactive concentration is correlated with the time required for decay to form data sets and stored, each data set forming a database. The application has the following effects: this application is gathered through the waste water radioactive concentration in earlier stage to decay pond and the waste water decay required time that is adapted to local environment, it stores to obtain initial radioactive concentration and decay required time one-to-one, form the database, follow-up after carrying out initial radioactive concentration to waste water and detecting, retrieve in the database with the decay required time that the initial radioactive concentration that detects corresponds, discharge waste water after the decay required time that corresponds.
Description
Technical Field
The application relates to the field of radioactive sewage treatment, in particular to a radioactive wastewater treatment method and system.
Background
The nuclear medicine department of medical institutions widely uses isotopes to perform imaging diagnosis and treatment, but the excrement generated after patients take and inject radioactive isotopes in the diagnosis and treatment processes carries radioactive wastewater, so that the radioactive wastewater is treated, otherwise, serious water pollution is caused.
In the related art, it is necessary to discharge radioactive wastewater into a decay tank, so that nuclides with a short half-life period in the radioactive wastewater decay, reduce the radioactive concentration of the wastewater, and discharge the wastewater after the radioactive concentration is reduced to a predetermined value or less.
In view of the above-mentioned related technologies, the inventor believes that the higher the radioactive concentration of the wastewater, the longer the time from natural decay to the radioactive concentration of the wastewater below a predetermined value will be, and since the radioactive concentration of the medical wastewater entering the decay tank is unknown, the wastewater needs to be frequently sampled to detect the radioactive concentration of the wastewater during the decay process, and the wastewater can be discharged only when the detected radioactive concentration of the wastewater is less than the predetermined value, which causes the detection process to be complicated; on the other hand, if the sampling frequency is lowered, the radioactive concentration of the wastewater is already lower than the predetermined value but is not sampled, and the unnecessary decay time is prolonged.
Disclosure of Invention
In order to improve whether the radioactive concentration of the waste water is lower than a specified value or not, the application provides a radioactive waste water treatment method and a radioactive waste water treatment system.
On one hand, the radioactive wastewater treatment method provided by the application adopts the following technical scheme:
a radioactive wastewater treatment method comprises the following steps:
discharging radioactive wastewater into a homogenizing tank for homogenization treatment;
discharging the wastewater after the homogenization treatment into a decay tank, recording the initial radioactive concentration of the wastewater before the decay begins, timing the decay time, detecting the radioactive concentration of the wastewater in the decay tank in the decay process until the radioactive concentration of the wastewater is lower than a discharge standard value, obtaining the time required by the decay, and discharging the wastewater;
associating the initial radioactive concentration with decay time to form a data set and storing the data set, and forming a database for each data set after a plurality of decays of the wastewater form corresponding data sets;
during subsequent wastewater decay, the initial radioactive concentration of the wastewater prior to the start of the decay is detected, the time required for decay associated with the current initial radioactive concentration is retrieved from the database, and the current wastewater is discharged after the associated time required for decay has elapsed.
By adopting the technical scheme, the radioactive concentration of the wastewater in the decay tank and the time required by the decay of the wastewater suitable for the local environment are collected in the early stage, the initial radioactive concentration and the time required by the decay are obtained and stored in a one-to-one correspondence manner to form a database, the time required by the decay corresponding to the detected initial radioactive concentration is searched in the database after the initial radioactive concentration of the wastewater is detected subsequently, the wastewater is discharged after the corresponding time required by the decay, the frequency of sampling and detecting the radioactive concentration is greatly reduced in the subsequent decay process, and the complexity of the detection process is reduced; whilst with the time required for decay in the database as a reference, the problem of prolonging unnecessary decay time when the radioactive concentration of the waste water has fallen below a specified value but has not been sampled arises.
Optionally, the detecting the initial radioactive concentration of the wastewater before the decay begins further comprises, after the time required for the decay associated with the current initial radioactive concentration is retrieved from the database: and after the associated decay time, performing radioactive concentration detection on the wastewater in the decay tank again, and discharging the wastewater if the radioactive concentration of the wastewater obtained by detection is lower than a discharge standard value.
Through adopting above-mentioned technical scheme, carry out the radioactive concentration detection to waste water once more before discharging, improve and discharge accurate control to radioactive waste water, ensure that the radioactive concentration of the waste water of discharging is less than the emission standard value, prevent to discharge the waste water that the radioactive concentration exceeds standard to the environment in.
Optionally, in the process of decay of the subsequent wastewater, the method further comprises the following steps after detecting the initial radioactive concentration of the wastewater before the decay begins:
if the initial radioactive concentration of the current wastewater is not retrieved in the database, retrieving a first initial radioactive concentration which is greater than and closest to the current initial radioactive concentration and a second initial radioactive concentration which is less than and closest to the current initial radioactive concentration, and associating the first initial radioactive concentration with a first decay time corresponding to the first initial radioactive concentration and a second initial radioactive concentration with a second decay time corresponding to the second initial radioactive concentration;
and calculating the intermediate value of the first decay time and the second decay time as a third decay time corresponding to the current initial radioactive concentration, detecting the radioactive concentration of the wastewater after the third decay time, and discharging the wastewater under the condition that the detection result is less than a discharge standard value.
By adopting the technical scheme, after the wastewater decays for a plurality of times and corresponding data sets are formed, each data set forms a database, more data sets formed by the real radioactive concentration and the decay time are stored in the database, and the radioactive wastewater of the hospital is in a stable interval, so that the radioactive wastewater can not be greatly increased or reduced; if the current initial radioactive concentration is not in the database, correlating to a first initial radioactive concentration and a second initial radioactive concentration which are closest to the current initial radioactive concentration, and taking an intermediate value of the first decay time and the second decay time corresponding to the correlated first initial radioactive concentration and the second initial radioactive concentration as the decay time corresponding to the current initial decay concentration, so that the frequency of sampling and detecting the radioactive concentration is reduced, and the complexity of the detection process is reduced; whilst with the time required for decay in the database as a reference, the problem of prolonging unnecessary decay time when the radioactive concentration of the waste water has fallen below a specified value but has not been sampled arises.
Optionally, the radioactive concentration of the wastewater in the decay tank is detected again, if the radioactive concentration of the wastewater obtained by detection is higher than the discharge standard value, the radioactive concentration of the wastewater is detected again after the decay is prolonged by one tenth to one eighth of the time required for the decay corresponding to the initial radioactive concentration of the current wastewater, and if the radioactive concentration of the wastewater obtained by detection is lower than the discharge standard value, the wastewater is discharged.
Through adopting above-mentioned technical scheme, waste water is after the decay of decay required time, if there is radioactive concentration still to be greater than the condition of emission standard value, further prolongs decay time, improves and discharges accurate control to radioactive waste water, ensures that the radioactive concentration of discharged waste water is less than the emission standard value, prevents to discharge the waste water that radioactive concentration exceeds standard in the environment.
Optionally, before the discharging the radioactive wastewater into the homogenizing tank for homogenization treatment, the method further comprises:
and performing preliminary detection on the radioactive concentration of the wastewater, and adding water for dilution until the radioactive concentration is less than a preset value if the detected radioactive concentration is greater than the preset value.
By adopting the technical scheme, the preset value means that the radioactive concentration of the radioactive waste water can be treated by natural decay under the condition that the radioactive concentration is lower than the preset value, and the radioactive concentration of the radioactive waste water is not suitable for natural decay treatment due to the overlong decay period under the condition that the radioactive concentration of the radioactive waste water is higher than the preset value. The radioactive concentration of the radioactive wastewater is detected, and the radioactive wastewater discharged into the domestic wastewater is diluted under the condition that the detection value is greater than the preset value, so that the decay treatment period of the wastewater is shortened, and the overall wastewater treatment efficiency is improved.
Optionally, the discharging the homogenized wastewater into a decay tank comprises:
and discharging the waste water into a plurality of decay ponds for natural decay, wherein the initial radioactive concentration and the decay time of the waste water in each decay pond are stored in a database in a one-to-one correspondence manner.
Through adopting above-mentioned technical scheme, carry out waste water decay simultaneously through a plurality of decay ponds and handle, improve waste water treatment efficiency on the one hand, on the other hand accelerates the increment of data set in the database.
Optionally, the method further includes a process of correcting data in the data group:
prolonging decay and timing the prolonged decay, and after the prolonged decay, if the radioactive concentration of the detected waste water is lower than the emission standard value, stopping prolonging decay timing to obtain prolonged decay time, recording as one-time abnormal decay, and storing;
after the abnormal decay record of the wastewater with the same initial radioactive concentration reaches the abnormal time threshold, the sum of the time required for the original decay and the extended decay time is stored in the data set instead of the time required for the original decay.
By adopting the technical scheme, the time required by prolonged decay is collected under the condition of prolonged decay, the time required by the prolonged decay is recorded as an abnormal decay record under the condition of judging abnormal decay, the time required by the original decay in the database is corrected after the abnormal decay time of the waste water record with the same initial radioactive concentration reaches the abnormal time threshold, and the accuracy of the database as a reference database is improved.
Optionally, the method further comprises acquiring a first ambient temperature at the same time of detecting each initial radioactive concentration, and forming a data base with a data set corresponding to the initial radioactive concentration and the decay time;
and obtaining a second environment temperature when the wastewater is subjected to the prolonged decay process, and if the second environment temperature is higher than the first environment temperature and reaches the environment temperature threshold, recording abnormal decay in the current prolonged decay.
By adopting the technical scheme, under the condition of temperature rise, the water content in the wastewater is reduced due to the enhancement of the evaporation effect, namely, the reflex concentration is increased, under the comparison of the first environment temperature and the second environment temperature, whether the current reason for prolonging decay is the reflex concentration increase caused by the temperature rise is judged, as the decay tank is generally positioned under the ground, the temperature environment is more constant, the temperature change within a certain period of time is temporary and cannot be used as the influence factor in the whole decay process, the influence of the environment temperature factor is not recorded as one-time abnormal decay record, so that the abnormal decay time reaches the abnormal time threshold due to the temperature change, and the reference data in the database is wrongly modified.
On the other hand, the radioactive wastewater treatment system provided by the application adopts the following technical scheme:
a system of a radioactive wastewater treatment method comprises a decay tank, a water control module, a treatment module and a detection module;
the decay tank is used for storing radioactive waste water so as to carry out the natural decay process of the waste water;
the water control module is used for discharging waste water into the decay tank or discharging the waste water from the decay tank, and the water control module is controlled by the treatment module;
the detection module is used for detecting the radioactive concentration of the wastewater in the decay tank and is connected with the processing module;
the treatment module comprises a treatment unit and a storage unit, wherein the treatment unit is used for controlling the detection module to detect the radioactive concentration of the wastewater for the first time after the wastewater enters the decay tank to obtain an initial radioactive concentration and start timing, the treatment unit is also used for controlling the detection module to detect the radioactive concentration of the wastewater at a set frequency until the radioactive concentration is lower than a discharge standard value in the natural decay of the wastewater to obtain time required for decay, the initial radioactive concentration and the time required for decay are associated to form a data set and stored, and after a plurality of times of wastewater decays and corresponding data sets are formed, each data set forms a database and is stored in the storage unit;
the processing unit is also used for judging the comparison between the detected radioactive concentration and the discharge standard value, and controlling the water control module to discharge the wastewater in the decay tank under the condition that the detected radioactive concentration is lower than the discharge standard value;
the processing unit is also used for retrieving the corresponding decay time in the database according to the initial radioactive concentration in the decay tank, and controlling the water control module to discharge the waste water after the retrieved decay time.
By adopting the technical scheme, the radioactive concentration of the wastewater in the decay tank and the decay time of the wastewater suitable for the local environment are collected in the early stage, the initial radioactive concentration and the decay time are obtained and stored in a one-to-one correspondence manner to form a database, the decay time corresponding to the detected initial radioactive concentration is searched in the database after the initial radioactive concentration of the wastewater is detected subsequently, the wastewater is discharged after the corresponding decay time, the frequency of sampling and detecting the radioactive concentration is greatly reduced in the subsequent decay process, and the complexity of the detection process is reduced; whilst with the time required for decay in the database as a reference, the problem of prolonging unnecessary decay time when the radioactive concentration of the waste water has fallen below a specified value but has not been sampled arises.
Optionally, the number of decay ponds is 3.
Through adopting above-mentioned technical scheme, adopt three decay pond to carry out decay simultaneously to radioactive waste water and handle, carry out the natural decay of waste water in 3 decay ponds, improve the decay treatment effeciency of waste water.
In summary, the present application includes at least one of the following beneficial technical effects:
1. according to the method, the radioactive concentration of the wastewater in the decay tank and the time required by the decay of the wastewater adapting to the local environment are collected in the early stage, the initial radioactive concentration and the time required by the decay are obtained and stored in a one-to-one correspondence manner to form a database, the time required by the decay corresponding to the detected initial radioactive concentration is searched in the database after the initial radioactive concentration of the wastewater is detected subsequently, the wastewater is discharged after the corresponding time required by the decay, the frequency of sampling and detecting the radioactive concentration is greatly reduced in the subsequent decay process, and the complexity of the detection process is reduced; while reducing the problem of extending unnecessary decay time when the radioactive concentration of the wastewater has fallen below a prescribed value but has not been sampled, with the time required for decay in the database as a reference.
2. After the waste water decays for the time required by decay, if the radioactive concentration is still greater than the emission standard value, the decay time is further prolonged, the emission accuracy control of the radioactive waste water is improved, the radioactive concentration of the discharged waste water is ensured to be lower than the emission standard value, and the waste water with the radioactive concentration exceeding the standard is prevented from being discharged into the environment.
3. And collecting the time required by prolonged decay under the condition of prolonged decay, recording as an abnormal decay record under the condition of judging abnormal decay, and correcting the time required by original decay in the database after the abnormal decay time of the wastewater record with the same initial radioactive concentration reaches an abnormal time threshold value, so that the accuracy of taking the database as a reference database is improved.
Drawings
FIG. 1 is a schematic view of a radioactive wastewater treatment system as described herein.
FIG. 2 is a schematic view of a homogenization tank of the radioactive wastewater treatment system described herein.
FIG. 3 is a block schematic diagram of a radioactive wastewater treatment system as described herein.
FIG. 4 is a flow diagram of a method for radioactive wastewater treatment as described herein.
FIG. 5 is a flow chart of data modification in the radioactive wastewater treatment method according to the present application.
Reference numerals: 100. a liquid storage tank; 200. a homogenizing pool; 201. a motor; 202. rotating the rod; 301. a first decay tank; 302. a second decay tank; 303. a third decay tank; 401. a first water inlet valve; 402. a first drain valve; 403. a second water inlet valve; 404. a second drain valve; 405. a third water inlet valve; 406. and a third drain valve.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
Example 1:
the embodiment of the application discloses radioactive wastewater treatment system.
As shown in fig. 1, a radioactive waste water treatment system, including the liquid storage tank 100 that is used for receiving, holds radioactive waste water, liquid storage tank 100 has even pond 200 through the pipe connection, and even pond 200 has three decay ponds in parallel through the pipe connection, including first decay pond 301, second decay pond 302 and third decay pond 303, under the drive through the water pump, with waste water from liquid storage tank 100 drive to even pond 200, reentrant decay in the decay pond.
As shown in fig. 2, homogenization tank 200: a agitating unit for being arranged in stirring waste water and making the waste water homogenization to the waste water among the liquid storage tank 100 carries out homogenization treatment, is provided with in even pond 200, agitating unit including set up in the motor 201 in even pond 200 lateral wall outside, the output shaft perpendicular to of motor 201 sets up in even pond 200 lateral wall, is provided with L shape dwang 202 on the inside motor 201 output shaft position in even pond 200.
As shown in fig. 3, the water level monitoring system further comprises a water control module, a detection module, a processing module, a temperature module and a water level monitoring module.
As shown in fig. 1, the water control module is used for controlling the discharge or discharge of waste water in the decay tank, and comprises a first water inlet valve 401, a second water inlet valve 403, a third water inlet valve 405, a first water discharge valve 402, a second water discharge valve 404 and a third water discharge valve 406; a first water inlet valve 401 and a first water discharge valve 402 are respectively arranged on a water inlet and a water outlet of the first decay tank 301; a second water inlet valve 403 and a second water discharge valve 404 are respectively arranged on a water inlet and a water outlet of the second decay tank 302; a third water inlet valve 405 and a third water discharge valve 406 are respectively arranged on a water inlet and a water outlet of the third decay tank 303; wherein, water inlet valve and drain valve are the electric control valve, are controlled by processing module.
The detection module is used for detecting the radioactive concentration of the waste water in the decay pond and the uniform pool 200, and comprises a first detection unit arranged in the liquid storage pond 100 and a second detection unit arranged in the first decay pond 301, the second decay pond 302 and the third decay pond 303, wherein the first detection unit and the second detection unit are connected with the processing module, and in the embodiment, the first detection unit and the second detection unit are radioactive detectors. The radioactivity detector in the homogenizing tank 200 is used for performing preliminary radioactivity detection on the wastewater in the homogenizing tank 200, water needs to be added for dilution when the radioactivity concentration is greater than a preset value, the preset value means that the wastewater with the radioactivity concentration below the preset value is treated in a natural decay mode, and the wastewater with the radioactivity concentration above the preset value is not treated in a natural decay mode when the wastewater with the radioactivity concentration above the preset value is treated in a decay treatment periodic process due to overlarge radioactivity concentration.
The water level monitoring module comprises a liquid level sensor arranged in the first decay pond 301, the liquid level sensor can adopt a photoelectric or capacitive liquid level sensor and is used for detecting the water level of wastewater in the first decay pond 301, the liquid level sensor is connected to the processing module, under the condition that the water level of the wastewater in the first decay pond 301 reaches the preset highest water level, the processing module controls the first water inlet valve 401 to be opened, the wastewater is discharged into the first decay pond 301, under the condition that the water level of the wastewater in the first decay pond 301 reaches the preset highest water level, the processing module controls the first water inlet valve 401 to be closed, and the wastewater stops being discharged into the first decay pond 301. Similarly, the second and third cells 302 and 303 are also provided with level sensors and controlled in the same manner as the first cell 301.
The temperature module is a temperature sensor arranged in each decay tank, the temperature sensor is connected with the processing unit, the temperature sensor is used for detecting a first environment temperature for the decay tanks while detecting the initial radioactive concentration of the wastewater, and the first environment temperature, the initial radioactive concentration and the decay time are stored as a data set and stored;
detect second ambient temperature to the decay pond in the time of the extension decay, second ambient temperature sends processing module with first ambient temperature.
The processing module comprises a processing unit and a storage unit;
the processing unit is connected with the detection unit, after the wastewater is discharged into the first decay tank 301 and reaches a preset highest water level, the processing unit controls the radioactivity detector in the first decay tank 301 to detect the radioactivity concentration of the wastewater in the first decay tank 301, so that the initial radioactivity concentration A of the wastewater in the first decay tank 301 is obtained, timing is started, during the timing, the processing unit controls the radioactivity detector in the first decay tank 301 to intermittently detect the radioactivity concentration of the wastewater in the first decay tank 301 until the radioactivity concentration of the wastewater in the first decay tank 301 is lower than a discharge standard value, and timing is stopped so that decay required time T is obtained; the initial radioactive concentration a is stored in a storage unit in correspondence with the time T required for decay.
Similarly, the second and third decay ponds 302 and 303 perform the above operations, and after a plurality of decays of the wastewater, a plurality of sets of initial radioactive concentration a and decay time T are obtained, wherein the number of the data sets is not less than 100, and a and T are stored in the storage unit correspondingly to form a database.
After the database is established, after the wastewater is discharged into the first decay tank 301 to reach the preset highest water level, the processing unit controls the radioactivity detector in the first decay tank 301 to detect the radioactivity concentration of the wastewater in the first decay tank 301, so as to obtain the initial radioactivity concentration of the wastewater in the first decay tank 301, the processing unit is further used for retrieving the decay required time corresponding to the current initial radioactivity concentration from the database, after the wastewater passes through the decay required time, the processing unit controls the radioactivity detector in the first decay tank 301 to detect the radioactivity concentration of the wastewater in the first decay tank 301, and the wastewater is discharged when the radioactivity concentration is lower than the discharge standard value.
After the database is built, after the wastewater is discharged into the first decay tank 301 to reach the preset maximum water level, the processing unit controls the radioactivity detector in the first decay tank 301 to detect the radioactivity concentration of the wastewater in the first decay tank 301, so as to obtain the initial radioactivity concentration of the wastewater in the first decay tank 301, the processing unit is further used for retrieving the decay time required by the current initial radioactivity concentration from the database, if the associated decay time is not retrieved from the database, the processing unit retrieves a first initial radioactivity concentration which is closest to the current initial radioactivity concentration and is greater than the current initial radioactivity concentration and a second initial radioactivity concentration which is closest to the current initial radioactivity concentration and is less than the current initial radioactivity concentration from the database, retrieves a first decay time required by decay and a second decay time required by decay from the database, takes the middle value of the first decay time required by decay and the second decay time required by decay as the decay time required by decay, and stores the middle value of the first decay time required by decay and the second decay time required by decay as the current initial radioactivity concentration into the database in one-to one correspondence.
After the wastewater decays by the decay time, wherein the decay time is calculated by retrieving it directly into the database and not in the database, the processing unit controls the radioactivity detector in the first decay tank 301 to detect again the radioactivity concentration of the wastewater in the first decay tank 301 and compare it with the discharge standard, and if the radioactivity concentration is less than the discharge standard, the wastewater is discharged; and in the case of the radioactive concentration being larger than the emission standard, prolonging the time for 1/10-1/8 of the decay time of the original source, and detecting the radioactive concentration again until the radioactive concentration is smaller than the emission standard.
The processing unit is also used for correcting decay time in the database:
after the wastewater decays by the corresponding decay time required by the decay in the database, if the radioactive concentration of the wastewater is still greater than the standard discharge value, prolonging the decay of the wastewater, timing the prolonged decay, detecting the radioactive concentration again after 1/10-1/8 of the prolonged decay time required by the prolonged original decay until the radioactive concentration is less than the discharge standard, stopping the prolonged decay time timing, obtaining the prolonged decay time, recording the prolonged decay time as a one-time abnormal decay record, and storing;
in the subsequent waste water decay process, if the abnormal decay record recorded by the waste water with the same initial radioactive concentration reaches an abnormal time threshold value, accumulating the mean value of the prolonged decay time and the original decay time corresponding to the initial radioactive concentration to obtain new decay time, storing the new decay time in a database instead of the original decay time, and correcting the database. The threshold of the number of anomalies can be set, for example, between 3 and 5 times.
Judgment for abnormal decay:
the processing unit acquires a first environment temperature and a second environment temperature of the temperature sensor, and when the second environment temperature is higher than the first environment temperature and reaches an environment temperature threshold, the processing unit judges that the time required for decay is increased due to the fact that the water in the wastewater is evaporated due to temporary temperature rise, so that the radioactive concentration of the wastewater is increased, and the environment temperature threshold can be preset, for example, set to be 20-25 ℃.
Otherwise, the processing unit judges that the time needed by the original decay in the database is inaccurate and needs to be corrected.
The first decay tank 301 is taken as an example, the second decay tank 302 and the third decay tank 303 are similar to each other, and the number of the decay tanks is not limited to 3, and can be increased or decreased according to actual conditions.
The processing unit is also connected with and controls a first water inlet valve 401, a second water inlet valve 403, a third water inlet valve 405, a first drain valve 402, a second drain valve 404 and a third drain valve 406; under the condition that the radioactivity concentration of the wastewater detected by the radioactivity detector is lower than a discharge standard value, the processing unit controls the drain valve of the corresponding decay tank to discharge the wastewater; after the wastewater is discharged, the liquid level of the wastewater in the decay tank reaches or is lower than the preset lowest liquid level, the processing unit controls the water inlet valve of the corresponding decay tank to be opened and the water discharge valve to be closed, and the wastewater to be decayed is discharged into the decay tank.
The processing unit realizes the control through a logic execution unit and can adopt processing chips with data processing and control capabilities such as a CPU, an MCU or an FPGA; the storage unit is a ROM of the CPU or the MCU.
The implementation principle of the system for treating radioactive wastewater in the embodiment of the application is as follows:
collecting initial radioactive concentration and decay time data after a period of time, establishing a database about the initial radioactive concentration and the decay time, detecting the initial radioactive concentration of the wastewater for the first time before the subsequent wastewater decays, searching the decay time corresponding to the current initial radioactive concentration in the database, detecting the radioactive concentration of the wastewater again after the wastewater decays by the corresponding decay time, and discharging the wastewater under the condition that the radioactive concentration is lower than a discharge standard value; in the case where the radioactive concentration is higher than the emission standard value, the decay time is extended until the radioactive concentration is lower than the emission standard value, and the waste water is discharged.
Example 2:
the embodiment of the application discloses a method for treating radioactive wastewater.
The method of the embodiment is applied to the radioactive wastewater treatment system of the embodiment 1.
The method comprises the following steps:
the wastewater collected in the liquid storage tank 100 is discharged to the homogenizing tank 200 for homogenization treatment, so that the wastewater is mixed and stirred uniformly. The radioactive concentration of the wastewater is preliminarily collected in the homogenization tank 200, and water is added for dilution when the concentration is greater than a preset value until the radioactive concentration of the wastewater is lower than the preset value.
As shown in fig. 4, the process of building the database:
the wastewater enters the first decay tank 301 to decay under the driving of the water pump, and when the first decay tank 301 discharges water, the water inlet valve of the first decay tank 301 is opened and the water discharge valve is closed; the radioactive concentration of the wastewater in the first decay tank 301 is detected as the initial radioactive concentration A of the wastewater, timing is started, the wastewater in the first decay tank 301 begins to decay, the radioactive concentration of the wastewater in the decay tank is periodically detected in the decay process, the frequency of detecting the concentration of the wastewater can be varied from 3 days to 5 days, adjustment is carried out according to actual conditions, when the radioactive concentration of the wastewater is detected in the decay process, the wastewater continues to naturally decay in the first decay tank 301 under the condition that the radioactive concentration is less than a discharge standard value until the radioactive concentration is less than the discharge standard value, and the timing is ended to obtain the time T required by decay. And detecting the ambient temperature while detecting the initial radioactive concentration to obtain a first ambient temperature.
The initial radioactive concentration A, the decay time T and the first environment temperature are in one-to-one correspondence to form a data set and stored, the above process is only the decay process of the first decay tank 301, and similarly, the second decay tank 302 and the third decay tank 303 perform the above operation, and after a plurality of times of waste water decay, a plurality of groups of initial radioactive concentration A and decay time T are obtained, wherein the number of the data sets is not lower than 100, and A and T are stored in the storage unit correspondingly to form a database.
And (3) data retrieval process:
after the wastewater is discharged into the first decay tank 301 (or the second decay tank 302 or the third decay tank 303), the radioactive concentration of the wastewater is firstly detected to obtain the current initial radioactive concentration of the wastewater, the processing unit searches the database for the decay time associated with the current initial radioactive concentration, the radioactive concentration of the wastewater is detected again after the decay time of the wastewater, and the wastewater is discharged when the radioactive concentration of the wastewater is lower than the discharge standard.
After the wastewater is discharged into the first decay cell 301 (or the second decay cell 302 and the third decay cell 303), firstly, the radioactive concentration of the wastewater is detected to obtain the initial radioactive concentration of the current wastewater, the processing unit does not retrieve the time required for decay associated with the current initial radioactive concentration from the database, the processing unit retrieves a first initial radioactive concentration which is closest to and greater than the current initial radioactive concentration and a second initial radioactive concentration which is closest to and less than the current initial radioactive concentration from the database, retrieves a first decay required time and a second decay required time corresponding to the first initial radioactive concentration and the second initial radioactive concentration from the database, and takes the intermediate value of the first decay required time and the second decay required time as the decay required time associated with the current initial radioactive concentration and stores the intermediate values into the database in a one-to-one correspondence manner.
After the wastewater decays by the decay time, wherein the decay time is calculated by retrieving it directly into the database and not in the database, the processing unit controls the radioactivity detector in the first decay tank 301 to detect again the radioactivity concentration of the wastewater in the first decay tank 301 and compare it with the discharge standard, and if the radioactivity concentration is less than the discharge standard, the wastewater is discharged; and in the case of the emission standard being higher than the emission standard, after prolonging the 1/10-1/8 prolonged time of the time required by the original decay, detecting the radioactive concentration again until the radioactive concentration is lower than the emission standard, and updating the time required by the decay. During the extended decay process, the ambient temperature is detected to obtain a second ambient temperature.
As shown in fig. 5, the processing unit is also used to correct the decay time in the database:
after the wastewater decays by the corresponding decay time required by the database, if the radioactive concentration of the wastewater is still greater than the standard discharge value, prolonging the decay of the wastewater, timing the prolonged decay, detecting the radioactive concentration again after prolonging 1/10-1/8 of the time required by the original decay until the radioactive concentration is less than the discharge standard, stopping prolonging the decay time timing, obtaining the prolonged decay time, recording as a one-time abnormal decay record, and storing;
in the subsequent waste water decay process, if the abnormal decay record recorded by the waste water with the same initial radioactive concentration reaches an abnormal time threshold value, accumulating the mean value of the prolonged decay time and the original decay time corresponding to the initial radioactive concentration to obtain new decay time, storing the new decay time in a database instead of the original decay time, and correcting the database. The threshold of the number of anomalies can be set, for example, between 3 and 5 times.
Judgment for abnormal decay:
the processing unit acquires a first environment temperature and a second environment temperature of the temperature sensor, and when the second environment temperature is higher than the first environment temperature and reaches an environment temperature threshold, the processing unit judges that the time required for decay is increased due to the fact that the water in the wastewater is evaporated due to temporary temperature rise, so that the radioactive concentration of the wastewater is increased, and the environment temperature threshold can be preset, for example, set to be 20-25 ℃.
Otherwise, the processing unit judges that the time needed by the original decay in the database is inaccurate and needs to be corrected.
The first decay tank 301 is taken as an example, the second decay tank 302 and the third decay tank 303 are similar to each other, and the number of the decay tanks is not limited to 3, and can be increased or decreased according to actual conditions.
The first decay tank 301 is taken as an example, the second decay tank 302 and the third decay tank 303 are similar to each other, and the number of the decay tanks is not limited to 3, and can be increased or decreased according to actual conditions.
The implementation principle of the radioactive wastewater treatment method in the embodiment of the application is as follows:
firstly, collecting initial radioactive concentration and decay time data after a period of time, establishing a database about the initial radioactive concentration and the decay time, detecting the initial radioactive concentration of the wastewater for the first time before the decay of the subsequent wastewater, searching the decay time corresponding to the current initial radioactive concentration in the database, detecting the radioactive concentration of the wastewater again after the decay of the wastewater by the corresponding decay time, and discharging the wastewater under the condition that the radioactive concentration is lower than a discharge standard value; in the case where the radioactive concentration is higher than the emission standard value, the decay time is extended until the radioactive concentration is lower than the emission standard value, and the waste water is discharged.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (6)
1. A radioactive wastewater treatment method is characterized in that:
the method comprises the following steps:
homogenizing radioactive wastewater;
before radioactive waste water naturally decays, recording the initial radioactive concentration of the waste water before the decay begins and timing decay time, detecting the radioactive concentration of the waste water in a decay pool in the decay process until the radioactive concentration of the waste water is lower than a discharge standard value, obtaining the time required by the decay, and discharging the waste water;
correlating the initial radioactive concentration with the decay time to form data sets and storing, wherein after a plurality of decays of the wastewater form corresponding data sets, each data set forms a database;
during subsequent wastewater decay, detecting the initial radioactive concentration of the wastewater before the beginning of the decay, retrieving in the database the time required for decay associated with the current initial radioactive concentration, the current wastewater being discharged after the associated time required for decay;
also included in the subsequent wastewater decay process are: after the associated decay time, carrying out radioactive concentration detection on the wastewater in the decay tank again, and if the radioactive concentration of the wastewater obtained by detection is lower than a discharge standard value, discharging the wastewater;
performing radioactive concentration detection on the wastewater in the decay tank again, if the radioactive concentration of the wastewater obtained by detection is higher than a discharge standard value, performing radioactive concentration detection on the wastewater again after prolonging decay by one tenth to one eighth of the time required by decay corresponding to the initial radioactive concentration of the current wastewater, and if the radioactive concentration of the wastewater obtained by detection is lower than the discharge standard value, discharging the wastewater;
the method also comprises the following process of correcting the data in the data group:
prolonging decay and timing the prolonged decay, and after the prolonged decay, if the radioactive concentration of the detected waste water is lower than the emission standard value, stopping prolonging decay timing to obtain prolonged decay time, recording as one-time abnormal decay, and storing;
after the abnormal decay record of the wastewater of the same initial radioactive concentration reaches the threshold number of anomalies, the sum of the time required for the original decay and the extended decay time is stored in the data set in place of the time required for the original decay.
2. The radioactive wastewater treatment method according to claim 1, wherein: in the subsequent wastewater decay process, the method also comprises the following steps after the initial radioactive concentration of the wastewater before the decay is started is detected:
if the initial radioactive concentration of the current wastewater is not retrieved in the database, retrieving a first initial radioactive concentration which is greater than and closest to the current initial radioactive concentration and a second initial radioactive concentration which is less than and closest to the current initial radioactive concentration, and associating the first initial radioactive concentration with a first decay time corresponding to the first initial radioactive concentration and a second initial radioactive concentration with a second decay time corresponding to the second initial radioactive concentration;
and calculating the intermediate value of the first decay time and the second decay time as a third decay time corresponding to the current initial radioactive concentration, detecting the radioactive concentration of the wastewater after the third decay time, and discharging the wastewater under the condition that the detection result is less than a discharge standard value.
3. The radioactive wastewater treatment method according to claim 1, wherein: before the homogenization treatment of the radioactive wastewater, the method further comprises the following steps:
and (4) performing preliminary detection on the radioactive concentration of the wastewater, and if the detected radioactive concentration is greater than a preset value, adding water for dilution until the radioactive concentration is less than the preset value.
4. The radioactive wastewater treatment method according to claim 1, wherein:
the method also comprises the steps of acquiring a first environment temperature while detecting each initial radioactive concentration, forming a data group with the corresponding initial radioactive concentration and decay time, and storing the data group in a database;
and obtaining a second environment temperature when the wastewater is subjected to the prolonged decay process, and if the second environment temperature is greater than the first environment temperature and reaches an environment temperature threshold value, recording abnormal decay in the current prolonged decay.
5. A system for performing the radioactive wastewater treatment method according to any one of claims 1 to 4, wherein: the device comprises a decay tank, a water control module, a processing module, a detection module and a temperature module;
the decay tank is used for storing radioactive waste water so as to carry out the natural decay process of the waste water;
the water control module is used for discharging waste water into the decay tank or discharging the waste water from the decay tank, and the water control module is controlled by the treatment module;
the detection module is used for detecting the radioactive concentration of the wastewater in the decay tank and is connected with the processing module;
the processing module comprises a processing unit and a storage unit, the processing unit is used for controlling the detection module to detect the radioactive concentration of the wastewater for the first time after the wastewater enters the decay tank to obtain an initial radioactive concentration and start timing, the processing unit is also used for controlling the detection module to detect the radioactive concentration of the wastewater at a set frequency until the radioactive concentration is lower than a discharge standard value in the natural decay of the wastewater to obtain time required for decay, the initial radioactive concentration and the time required for decay are associated to form a data set and stored, and after a plurality of times of wastewater decays and corresponding data sets are formed, each data set forms a database and is stored in the storage unit;
the processing unit is also used for judging the comparison between the detected radioactive concentration and the discharge standard value, and controlling the water control module to discharge the wastewater in the decay tank under the condition that the detected radioactive concentration is lower than the discharge standard value;
the processing unit is also used for retrieving the corresponding decay time in the database according to the initial radioactive concentration in the decay tank, and controlling the water control module to discharge the wastewater after the retrieved decay time;
the processing unit is also used for judging whether decay needs to be prolonged or not according to the waste water after decay by the decay time and the emission standard value, judging whether the current prolonged decay is abnormal decay or not according to the first environment temperature and the second environment temperature, and correcting the decay time of the database after the abnormal decay time is greater than the abnormal time threshold;
the temperature module is used for detecting the temperature of the environment of the decay tank, and comprises a first environment temperature detection module and a second environment temperature detection module, wherein the first environment temperature detection module is used for detecting the initial radioactive concentration of the wastewater; the second ambient temperature is detected while the wastewater undergoes extended decay.
6. The radioactive wastewater treatment system according to claim 5, wherein the number of decay ponds is 3.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007126189A1 (en) * | 2006-04-28 | 2007-11-08 | Dolki Korea, Ltd | Apparatus for removing red tide and apparatus for preventing water in pool from decaying |
| JP2013164267A (en) * | 2012-02-09 | 2013-08-22 | Mitsubishi Heavy Ind Ltd | Radioactive waste liquid processing apparatus and radioactive waste liquid processing method |
| CN106941015A (en) * | 2017-02-28 | 2017-07-11 | 曾锋 | One kind automatically controls medical radioactive waste water decay tapping equipment, system and method |
| CN110121663A (en) * | 2017-01-02 | 2019-08-13 | 韩国水力原子力株式会社 | Radioactivity survey method and radioactivity survey system |
| CN209264600U (en) * | 2018-11-29 | 2019-08-16 | 中广核久源（成都）科技有限公司 | A kind of activity measurement system of medical sewage |
| CN211628714U (en) * | 2019-12-18 | 2020-10-02 | 北京国原新技术有限公司 | Radioactive waste liquid treatment equipment for nuclear medicine diagnosis and treatment facility |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070289922A1 (en) * | 2006-06-15 | 2007-12-20 | Ladron De Guevara Cesar | Modular wastewater treatment system |
-
2021
- 2021-01-25 CN CN202110099880.2A patent/CN112786229B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007126189A1 (en) * | 2006-04-28 | 2007-11-08 | Dolki Korea, Ltd | Apparatus for removing red tide and apparatus for preventing water in pool from decaying |
| JP2013164267A (en) * | 2012-02-09 | 2013-08-22 | Mitsubishi Heavy Ind Ltd | Radioactive waste liquid processing apparatus and radioactive waste liquid processing method |
| CN110121663A (en) * | 2017-01-02 | 2019-08-13 | 韩国水力原子力株式会社 | Radioactivity survey method and radioactivity survey system |
| CN106941015A (en) * | 2017-02-28 | 2017-07-11 | 曾锋 | One kind automatically controls medical radioactive waste water decay tapping equipment, system and method |
| CN209264600U (en) * | 2018-11-29 | 2019-08-16 | 中广核久源（成都）科技有限公司 | A kind of activity measurement system of medical sewage |
| CN211628714U (en) * | 2019-12-18 | 2020-10-02 | 北京国原新技术有限公司 | Radioactive waste liquid treatment equipment for nuclear medicine diagnosis and treatment facility |
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