CN109903874B - Sewage treatment device and method - Google Patents
Sewage treatment device and method Download PDFInfo
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- CN109903874B CN109903874B CN201711307148.XA CN201711307148A CN109903874B CN 109903874 B CN109903874 B CN 109903874B CN 201711307148 A CN201711307148 A CN 201711307148A CN 109903874 B CN109903874 B CN 109903874B
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Abstract
The embodiment of the invention provides a sewage treatment device and a method, comprising the following steps: the device comprises a reaction device, a first medicament adjusting device, a mixing device, a second medicament adjusting device and a filtering device; the first medicament adjusting device controls the feeding flow of the first medicament to the reaction container according to the flow of the radioactive wastewater and/or the pH value of the first liquid; the second agent regulating device controls the administration flow rate of the second agent to the mixing device according to the flow rate of the radioactive wastewater and/or the flow current value of the second liquid. The sewage treatment device can accurately feed the first medicament and the second medicament, can reduce the medicament cost, can also reduce the generation amount of radioactive precipitates, and reduces the subsequent solid waste disposal cost. The sewage treatment device also has the advantages of high automation degree, less manual operation, safety, reliability, convenient equipment maintenance and the like.
Description
Technical Field
The invention relates to the field of radioactive wastewater treatment of nuclear power stations, in particular to a sewage treatment device and method.
Background
In the conventional wastewater treatment device for the nuclear power station, a flocculant adding mode is mostly adopted for removing suspended matters and radioactive metal colloids, the dosage of the medicament is generally set according to the designed maximum concentration of the suspended matters, and the suspended matters and the radioactive metal colloids in the wastewater of the nuclear power station do not reach the maximum value under most conditions, so that the dosage of the medicament is excessive, the generation amount of radioactive precipitates is increased, and the cost of the subsequent solidification treatment of the precipitated sludge is increased. Meanwhile, the existing precipitation filtration adopts active carbon deep bed filtration, although the active carbon is low in manufacturing cost and simple to implement, suspended matters smaller than 0.1 micrometer (micrometer) in wastewater cannot be filtered, short flow is easy to form, and a mud cake formed after the wastewater is operated for a period of time is easy to block, so that the replacement period is short, a large amount of secondary radioactive wastes (waste active carbon mixed with radioactive precipitates) are generated, and the cost of tail end treatment is increased.
Therefore, how to provide a drug that can realize accurate dosing and reduce the cost of the drug is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a sewage treatment device and method, and solves the problem that an existing dosing device cannot accurately dose medicines.
In order to solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided a sewage treatment apparatus including: the device comprises a reaction device, a first medicament adjusting device, a mixing device, a second medicament adjusting device and a filtering device;
the reaction device comprises: a reaction container, a first interface for injecting radioactive wastewater into the reaction container, a second interface for injecting a first medicament into the reaction container, and a third interface for outputting a first liquid in which the radioactive wastewater and the first medicament are mixed in the reaction container to the mixing device;
the first medicament adjustment device comprises: a fourth interface for outputting a first medicament to the reaction device, a first signal input for receiving a hydrogen ion concentration index pH value of the first liquid, a second signal input for receiving a first flow signal of the injected radioactive wastewater, the fourth interface being in communication with the second interface; wherein the first medicament adjusting device controls the feeding flow of the first medicament to the reaction container according to the flow of the radioactive wastewater and/or the pH value of the first liquid;
the second medicament adjustment device comprises: a fifth interface for outputting a second medicament to the mixing device, a third signal input for receiving a first flow signal of the injected radioactive wastewater, a fourth signal input for receiving a flowing current signal of a second liquid output by the mixing device; wherein the second medicament adjusting device controls the administration flow rate of the second medicament to the mixing device according to the flow rate of the radioactive wastewater and/or the flow current value of the second liquid;
the mixing device comprises: a sixth port for receiving the first liquid, a seventh port for receiving a second medicament, and an eighth port for outputting a second liquid in which the first liquid and the second medicament are mixed, the sixth port being in communication with the third port, the seventh port being in communication with the fifth port;
the filtering device comprises: a ninth port for receiving the second liquid and a tenth port for outputting a third liquid to an external device, the ninth port being in communication with the eighth port.
Optionally, the first medicament adjustment device comprises: the first detection device is used for detecting the pH value of the first liquid in the reaction container, and comprises a first metering pump, a first servo motor controller, a first variable-frequency speed regulator and a first medicament storage;
the first detection device includes: a first signal output end for sending the pH value of the first liquid to the first servo motor controller;
the first servo motor controller includes: the second signal output end is used for sending a first control signal to the first metering pump according to the pH value detected by the first detection device, and the sixth signal input end is electrically connected with the first signal output end;
the first variable frequency governor includes: a seventh signal input for receiving a first flow signal of the injected radioactive wastewater and a third signal output for sending a second control signal to the first metering pump according to the first flow signal of the injected radioactive wastewater;
the first medicament reservoir includes: an eleventh interface for outputting the first medicament;
the first metering pump includes: an eighth signal input electrically connected to the second signal output, a ninth signal input electrically connected to the third signal output, a twelfth port for receiving a first medicament from a first medicament reservoir, the twelfth port in communication with the eleventh port, and a thirteenth port for outputting a first medicament, the thirteenth port in communication with the second port; the first metering pump controls the dosing flow rate of the first medicament to the reaction vessel according to the first control signal and/or the second control signal.
Optionally, the second medicament adjustment device comprises: the second metering pump, the second servo motor controller, the second variable-frequency speed regulator, the second medicament storage and a second detection device for detecting the flowing current value of the second liquid;
the second detection device includes: a fourth signal output for sending a flowing current signal of the second liquid to the second servo motor controller;
the second servo motor controller includes: an eleventh signal input end electrically connected with the fourth signal output end and a fifth signal output end used for sending a fourth control signal to the second metering pump according to the flowing current value of the second liquid;
the second variable frequency governor includes: a twelfth signal input for receiving the first flow signal of the injected radioactive wastewater and a sixth signal output for sending a third control signal to the second metering pump according to the first flow signal of the injected radioactive wastewater;
the second medicament reservoir comprises: a fourteenth interface for outputting a second medicament;
the second metering pump includes: a thirteenth signal input electrically connected to the fifth signal output, a fourteenth signal input electrically connected to the sixth signal output, a fifteenth interface for inputting a second medicament, and a sixteenth interface for outputting a second medicament; the fifteenth interface is communicated with the fourteenth interface, and the sixteenth interface is communicated with the seventh interface; the second metering pump controls an administration flow rate of the second medicament to the mixing device according to the third control signal and/or the fourth control signal.
Optionally, the second detecting device includes: the device comprises a detection pipeline, and a current sensor, a current controller and a first flow regulating valve which are arranged on the detection pipeline and used for detecting the flow current value of the second liquid in the detection pipeline, wherein one end of the detection pipeline is communicated with an eighth interface of the mixing device, and the other end of the detection pipeline is communicated with a ninth interface of the filtering device;
the current sensor includes: a seventh signal output end for sending the detected value of the flowing current of the second liquid in the detection pipeline to the current controller;
the current controller includes: an eighth signal output terminal electrically connected to the eleventh signal input terminal, and a sixteenth signal input terminal electrically connected to the seventh signal output terminal.
Optionally, the sewage treatment apparatus further comprises: a shut-off valve disposed between the eighth port of the mixing device and the ninth port of the filtering device.
Optionally, the filtration device comprises: a circulating pump and a filtering membrane component;
the circulation pump includes: a nineteenth interface used for outputting a fourth liquid mixed by the radioactive sediment filtered by the filtering membrane component and the second liquid, and a twentieth interface communicated with the eighth interface of the mixing device;
the filtration membrane module includes: the first interface is communicated with the first interface, the second interface is communicated with the sludge solidification device, the third interface is communicated with the nineteenth interface, and the first interface is communicated with the second interface.
Optionally, the filtration device further comprises: a second flow rate regulating valve and a third flow meter for detecting a flow rate of the fourth liquid;
the third flow meter includes: a seventeenth signal input for receiving a second flow signal of the fourth liquid and a ninth signal output for sending the second flow signal of the fourth liquid to the second flow regulator valve;
the second flow rate regulating valve includes: an eighteenth signal input end electrically connected with the ninth signal output end, a twenty-fourth interface communicated with the nineteenth interface of the circulating pump, and a twenty-fifth interface communicated with the twenty-third interface of the filter membrane component.
Optionally, the filtration device further comprises: and the third flow regulating valve is arranged between the twenty-second interface of the filter membrane assembly and the sludge solidification device.
Optionally, the filtration device further comprises: a densitometer for detecting the density value of the radioactive precipitate filtered through the filter membrane assembly, the densitometer comprising: a tenth signal output for sending the density value of the radioactive deposit to a third flow regulating valve; and when the density value exceeds the set density value, outputting an opening instruction to the third flow regulating valve, and injecting the radioactive sediments into the sludge solidification device through the third flow regulating valve.
The embodiment of the invention also provides a sewage treatment method which is suitable for the sewage treatment device, and the method comprises the following steps:
the first medicament adjusting device injects a first medicament into the reaction device, and the reaction device mixes the first medicament with radioactive wastewater to form a first liquid;
the first medicament adjusting device controls the feeding flow of the first medicament according to the flow of the injected radioactive wastewater and/or the hydrogen ion concentration index pH value of the first liquid;
the second medicament regulating device injects a second medicament into the mixing device, the reaction device injects the first liquid into the mixing device, and the mixing device mixes the first liquid and the second medicament to form a second liquid;
the second medicament adjusting device controls the administration flow rate of the second medicament according to the flow rate of the injected radioactive wastewater and/or the flow current value of the second liquid;
the filtering device filters the second liquid.
The embodiment of the invention has the following beneficial effects:
in an embodiment of the present invention, the first agent adjusting device may control an administration flow rate of the first agent to the reaction container according to a flow rate of the radioactive wastewater and/or a pH of the first liquid. The second drug adjustment device may control an administration flow rate of the second drug to the mixing device according to a flow rate of the radioactive wastewater and/or a flow current value of the second liquid. According to the sewage treatment device provided by the embodiment of the invention, the first medicament and the second medicament can be accurately added through the first medicament adjusting device and the second medicament adjusting device, so that the medicament cost can be reduced, the generation amount of radioactive precipitates can be reduced, the subsequent solid waste disposal cost can be reduced, and the problem that the existing medicament adding device cannot accurately add medicaments is solved.
Furthermore, the second liquid can be filtered through the filtering device, and the problem that the generation amount of radioactive precipitates is increased due to the fact that the medicament is added excessively can be solved.
The sewage treatment device provided by the embodiment of the invention also has the advantages of high automation degree, less manual operation, safety, reliability, convenience in equipment maintenance and repair and the like.
Drawings
FIG. 1 is a schematic view of a sewage treatment apparatus according to an embodiment of the present invention.
Detailed Description
To make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a sewage treatment apparatus provided in this embodiment, and referring to fig. 1, the sewage treatment apparatus in this embodiment includes: the reaction device 1, the first medicament adjusting device 2, the mixing device 3, the second medicament adjusting device 4 and the filtering device 5; wherein the content of the first and second substances,
the reaction apparatus 1 includes: a reaction vessel 11, a first interface for injecting radioactive wastewater into the reaction vessel, a second interface for injecting a first drug into the reaction vessel, and a third interface for outputting a first liquid in which the radioactive wastewater and the first drug are mixed in the reaction vessel to the mixing device 3. Besides, in order to ensure that the radioactive wastewater and the first chemical agent are uniformly mixed, the reaction device 1 may further include: an agitator 12. The stirrer stirs the radioactive wastewater and the first agent to sufficiently mix and react the two.
The first medicament regulating device 2 comprises: a fourth interface for outputting a first medicament to the reaction device 1, a first signal input for receiving a pH (Hydrogen Ion Concentration index) value of the first liquid, a second signal input for receiving a first flow rate signal of the injected radioactive wastewater, the fourth interface being in communication with the second interface; wherein the first agent regulating device 2 controls an administration flow rate of the first agent to the reaction vessel in accordance with a flow rate of the radioactive wastewater and/or a pH of the first liquid.
The second agent regulating device 4 includes: a fifth interface for outputting a second medicament to the mixing device 3, a third signal input for receiving a first flow signal of the injected radioactive waste water, a fourth signal input for receiving a flowing current signal of a second liquid output by the mixing device 3; wherein the second drug adjusting device 4 controls an administration flow rate of the second drug to the mixing device 3 according to a flow rate of the radioactive wastewater and/or a flow current value of the second liquid.
The mixing device 3 comprises: a sixth port for receiving the first liquid, a seventh port for receiving a second medicament, and an eighth port for outputting a second liquid in which the first liquid and the second medicament are mixed, the sixth port being in communication with the third port, the seventh port being in communication with the fifth port.
The filtering device 5 comprises: a ninth port for receiving the second liquid and a tenth port for outputting a third liquid to an external device, the ninth port being in communication with the eighth port.
Preferably, the first chemical regulating device 2 and the second chemical regulating device 4 in the sewage treatment device can be controlled by a Programmable Logic Controller (PLC).
In an embodiment of the present invention, the first agent may be an acid-base agent for adjusting the pH value of the wastewater. The second agent may be a cationic polymeric flocculant, and in order to ensure that the cationic polymeric flocculant reacts with the wastewater to achieve the optimal effect, the pH value of the radioactive wastewater needs to be controlled within a range of 7.00 to 8.50 in the reaction device 1. It should be noted that the above description of the first and second agents is only exemplary and not limiting.
First, a first chemical is added to the reaction apparatus 1 through the first chemical adjustment apparatus 2, pH adjustment is performed on radioactive wastewater in the reaction apparatus 1, and the pH-adjusted radioactive wastewater forms a first liquid. Then, the first liquid enters the mixing device 3, and the first liquid and the second medicament injected by the second medicament adjusting device 4 are mixed and reacted through the mixing device 3 to form a second liquid after the mixing and reaction. Again, the second liquid is filtered by the filter means 5.
In the embodiment of the present invention, the first agent adjusting apparatus 2 may control an administration flow rate of the first agent to the reaction vessel according to a flow rate of the radioactive wastewater and/or a pH of the first liquid. The second drug adjustment device 4 may control an administration flow rate of the second drug to the mixing device 3 according to a flow rate of the radioactive wastewater and/or a flow current value of the second liquid. According to the sewage treatment device provided by the embodiment of the invention, the first medicament and the second medicament can be accurately added through the first medicament adjusting device 2 and the second medicament adjusting device 4, so that the medicament cost can be reduced, the generation amount of radioactive precipitates can be reduced, the subsequent solid waste disposal cost can be reduced, and the problem that the existing medicament adding device cannot accurately add medicaments is solved. Furthermore, the second liquid can be filtered through a filtering device, and the problem that the generation amount of radioactive precipitates is increased due to excessive addition of the medicament can be solved. The sewage treatment device provided by the embodiment of the invention also has the advantages of high automation degree, less manual operation, safety, reliability, convenience in equipment overhaul and maintenance and the like. With continued reference to fig. 1, the first medicament regulating device 2 comprises: a first detection device 21 for detecting the pH value of the first liquid in the reaction vessel, a first metering pump 22, a first servo motor controller 23, a first variable-frequency speed regulator 24 and a first medicament storage 25; wherein, the first and the second end of the pipe are connected with each other,
the first detecting means 21 comprises: a first signal output for sending the pH of the first liquid to the first servo motor controller 23; the first detecting unit 21 may be a pH meter, but is not limited thereto.
The first servo motor controller 23 includes: a second signal output end for sending a first control signal to the first metering pump 22 according to the pH value detected by the first detecting device 21, and a sixth signal input end electrically connected to the first signal output end.
The first variable frequency governor 24 includes: a seventh signal input for receiving the first flow signal of the radioactive waste injected and a third signal output for sending a second control signal to said first metering pump 22 in accordance with the first flow signal of the radioactive waste injected.
The first medicament reservoir 25 is for storing a first medicament, the first medicament reservoir 25 comprising: an eleventh interface for outputting the first medicament.
The first metering pump 22 includes: an eighth signal input electrically connected to the second signal output, a ninth signal input electrically connected to the third signal output, a twelfth port for receiving the first medicament from the first medicament reservoir 25, the twelfth port in communication with the eleventh port, and a thirteenth port for outputting the first medicament, the thirteenth port in communication with the second port; the first metering pump 22 controls the administration flow rate of the first chemical agent to the reaction container according to the first control signal and/or the second control signal. Wherein the dosage of the first medicament can be calculated according to the formula
Wherein the content of the first and second substances,
Q medicine A The dosing flow of the first metering pump is L/min;
pH end-final pH value of the reaction apparatus;
pH value in-pH value of radioactive wastewater injected;
M medicine A -the concentration of the agent in the first agent reservoir in mol/L;
Q into The water inlet flow of the radioactive wastewater is L/min.
It should be noted that the above description of the formula for calculating the first medicament dosing flow rate is only an example and is not limiting, and it should be understood that the formula for calculating the first medicament dosing flow rate is not specifically limited in the embodiment of the present invention.
In the embodiment of the present invention, firstly, the first detection device 21 detects a pH signal and sends the pH signal to the first servo motor controller 23, and the first servo motor controller 23 controls the stroke of the first metering pump 22 according to the pH signal, so as to control the dosing flow rate of the first medicament through the stroke of the first metering pump 22. Meanwhile, the first variable-frequency speed regulator 24 can also control the motor rotation speed of the first metering pump 22 according to the first flow signal of the injected radioactive wastewater, and further control the dosing flow rate (or dosing flow rate) of the first chemical by adjusting the motor rotation speed of the first metering pump 22. It should be noted that the dosing flow rate can be controlled by adjusting the motor speed of the first metering pump 22 and/or the stroke of the first metering pump 22, and the manner of controlling the dosing flow rate of the first medicament is not particularly limited in the embodiment of the present invention.
With continued reference to fig. 1, the second medicament regulating device 4 comprises: a second metering pump 41, a second servo motor controller 42, a second variable frequency speed regulator 43, a second medicament reservoir 44 and second detection means 45 for detecting the value of the flowing current of the second liquid. Wherein the content of the first and second substances,
the second detection device 45 includes: a fourth signal output for sending a flowing current signal of the second liquid to the second servo motor controller 42.
The second servo motor controller 42 includes: an eleventh signal input end electrically connected to the fourth signal output end, and a fifth signal output end for sending a fourth control signal to the second metering pump 41 according to the value of the flowing current of the second liquid.
The second variable-frequency speed regulator 43 includes: a twelfth signal input for receiving the first flow signal of the injected radioactive waste and a sixth signal output for sending a third control signal to the second metering pump 41 according to the first flow signal of the injected radioactive waste.
The second medicament reservoir 44 is for storing a second medicament, the second medicament reservoir 44 comprising: a fourteenth interface for outputting the second medicament. When the second agent is a cationic polymeric flocculant, the radioactive wastewater with the adjusted pH value enters the mixing device 3, and is mixed with the cationic polymeric flocculant from the second agent storage 44 pumped by the second metering pump 41 to react, so that the radioactive colloidal substances with smaller particle size in the radioactive wastewater are aggregated into flocculent precipitates with larger particle size. The wastewater which is mixed and reacted by the mixing device 3 and generates radioactive flocculent precipitate with large particle size needs to be injected into a filtering device 5 for filtering.
The second metering pump 41 includes: a thirteenth signal input electrically connected to the fifth signal output, a fourteenth signal input electrically connected to the sixth signal output, a fifteenth interface for inputting a second medicament, and a sixteenth interface for outputting a second medicament; the fifteenth interface is communicated with the fourteenth interface, and the sixteenth interface is communicated with the seventh interface; the second metering pump 41 controls the administration flow rate of the second medicament to the mixing device 3 according to the third control signal and/or the fourth control signal. Wherein, the formula for calculating the medicine adding flow of the second medicament can be
Wherein the content of the first and second substances,
Q medicine B The dosing flow of the second metering pump is L/min;
IC-Current flow value in mA;
a is conversion coefficient in mg/L mA;
M medicine B -the concentration of agent in the second agent reservoir in mg/L;
Q go into The water inlet flow of the radioactive wastewater is L/min.
It should be noted that, since the second medicament has a plurality of models, and the second medicament has different efficacy depending on the model, the a-conversion coefficient may be used to represent the conversion relationship between the dose amount of the second medicament and the flow current value, and the a-conversion coefficient is an empirical parameter. For example, the second chemical agent is a cationic polymeric flocculant, and since the efficacy of each type of cationic polymeric flocculant is different, it is necessary to actually measure the relationship between the addition amount and the flow current value of each type of cationic polymeric flocculant, the a-conversion coefficient may be used to represent the conversion relationship between the addition amount and the flow current value of each type of cationic polymeric flocculant, and the a-conversion coefficient may be an empirical parameter.
The above formula for calculating the dosing flow rate of the second medicament is only an example and is not a limitation, and it should be understood that the formula for calculating the dosing flow rate of the second medicament is not specifically limited in the embodiment of the present invention.
In the embodiment of the present invention, the second variable-frequency speed regulator 43 can control the dosing flow by controlling the motor speed of the second metering pump 41 according to the first flow signal of the injected radioactive wastewater. Meanwhile, the second servo motor controller 42 controls the stroke of the second metering pump 41 according to the flowing current signal of the second liquid, thereby controlling the dosing flow rate of the second medical agent by controlling the stroke of the second metering pump 41. It should be noted that the dosing flow rate can be controlled by adjusting the motor speed of the second metering pump 41 and/or the stroke of the second metering pump 41, and the manner of controlling the dosing flow rate of the second medicament is not particularly limited in the embodiment of the present invention.
It should be noted that the flowing current signal of the second liquid may be a flowing current value of the second liquid, or a Zeta potential of the second liquid converted from the flowing current value of the second liquid.
With continued reference to fig. 1, optionally, the second detection device 45 comprises: a detection pipe, and a current sensor 451, a current controller 452, a first flow rate adjustment valve 453, and a first flow meter 454 provided on the detection pipe for detecting a value of a flowing current of the second liquid in the detection pipe. Wherein, the first and the second end of the pipe are connected with each other,
one end of the detection pipeline is communicated with the eighth interface of the mixing device, and the other end of the detection pipeline is communicated with the ninth interface of the filtering device; the first flow meter 454 is used for monitoring the flow of the second liquid in the detection channel in real time;
the second liquid is introduced into the detection passage through the first flow rate adjustment valve 453, and the opening degree of the first flow rate adjustment valve 453 may be controlled according to the flow rate monitored by the first flow meter 454, and preferably, the sampling flow rate may be controlled in a range of 2.00L/min to 5.00L/min.
The current sensor 451 includes: a seventh signal output terminal for transmitting the detected value of the flowing current of the second liquid in the detection pipe to the current controller 452.
The current controller 452 includes: an eighth signal output terminal electrically connected to the eleventh signal input terminal and a sixteenth signal input terminal electrically connected to the seventh signal output terminal.
For example, the flowing current sensor 451 may continuously measure the current on-line through a pair of electrodes, and the flowing current controller 452 may amplify the measured current to indicate that the value of the flowing current of the second liquid is converted into the Zeta potential of the second liquid because the Zeta potential (or referred to as Zeta potential and Zeta potential) is proportional to the value of the flowing current. Assuming that the display range of the Zeta potential can be-10.00, the Zeta potential is the optimal dosing point when 0.00, the corresponding output is 4-20 mA, the current value displayed when the dosing flow of the second medicament is in accordance with the Zeta potential of 0.00 can be set as the zero point, the normal range of the current value is set around the zero point, and a high or low alarm signal can be output when the set normal range is exceeded.
In the present embodiment, the flowing current sensor 451 transmits the detected Zeta potential value of the second liquid to the flowing current controller 452, and the flowing current controller 452 controls the second servo motor controller 42 according to the Zeta potential value of the second liquid, and then the stroke of the second metering pump 41 is controlled by the second servo motor controller 42 according to the Zeta potential of the second liquid, so that the dosing flow rate of the second medicine is controlled by controlling the stroke of the second metering pump 41.
With continued reference to fig. 1, the filter device 5 comprises: a circulation pump 51 and a filtration membrane module 52; wherein the content of the first and second substances,
the circulation pump 51 includes: a nineteenth interface for outputting a fourth liquid mixed by the radioactive deposit filtered by the filtering membrane module 52 and the second liquid, and a twentieth interface communicated with the eighth interface of the mixing device 3.
The filtering membrane module 52 includes: a twenty-first interface communicated with the twentieth interface, a twenty-second interface communicated with a sludge solidification device and a twenty-third interface communicated with a nineteenth interface, wherein the twenty-first interfaceThe interface is also in communication with the twentieth interface. The filtering membrane module 52 can be a tubular filtering membrane module 52, and alpha-Al can be adopted as the filtering membrane module 52 2 O 3 Coating of alpha-Al 2 O 3 Is nanometer alumina, and the crystal form is alpha type.
In order to effectively prevent fouling, the filtering membrane module 52 may adopt large-flow parallel cross-flow filtration, and the filtering membrane module 52 is provided with a plurality of filtering pores, and the filtering pore size may be 0.05 μm to 0.10 μm.
In the embodiment of the present invention, the first liquid forms a second liquid after the mixing reaction of the mixing device 3, the second liquid enters the filtering membrane module 52 through the circulating pump 51 for filtering, and the wastewater filtered by the filtering membrane module 52 realizes internal large-flow circulation through the circulating pump 51 and the return line.
On the basis of the above embodiment, the embodiment of the present invention provides another sewage treatment apparatus, wherein the filtering apparatus 5 further includes: a second flow rate regulating valve 53 and a third flow meter 54 for detecting the flow rate of the fourth liquid. Wherein the content of the first and second substances,
the third flow meter 54 includes: a seventeenth signal input for receiving a second flow signal of the fourth liquid and a ninth signal output for sending the second flow signal of the fourth liquid to the second flow regulator valve 53.
The second flow rate adjustment valve 53 includes: an eighteenth signal input end electrically connected with the ninth signal output end, a twenty-fourth interface communicated with the nineteenth interface of the circulating pump 51, and a twenty-fifth interface communicated with the twenty-third interface of the filter membrane assembly.
In the embodiment of the present invention, the opening degree of the second flow rate adjusting valve 53 may be controlled according to the flow rate of the fourth liquid monitored in real time in the detection channel.
On the basis of the above embodiment, the embodiment of the present invention provides another sewage treatment apparatus, wherein the filtering apparatus 5 further comprises: a third flow rate regulating valve 55 and a density meter 56 for detecting the density value of the radioactive precipitates filtered through the filter membrane module. Wherein the content of the first and second substances,
the third flow regulating valve 55 is arranged between the twenty-second interface of the filter membrane assembly and the sludge solidification device.
The densitometer 56 includes: a tenth signal output for sending the density value of the radioactive deposit to a third flow regulating valve 55; when the density value exceeds the set density value, an opening command is output to the third flow rate adjustment valve 55, and the radioactive deposits are injected into the sludge solidification device through the third flow rate adjustment valve 55. The densitometer 56 may be a sonic densitometer, although not limited thereto.
When the radioactive precipitates in the filtering membrane module 52 exceed a set density value, the third flow regulating valve 55 is opened for blowdown, and the density value of the radioactive precipitates can be monitored in real time by a density meter 56 arranged on the circulating pipeline. The radioactive sediment discharged by the filtering membrane component 52 enters a sludge solidification device for subsequent solidification treatment, and the produced water of the filtering membrane component 52 enters a subsequent ion exchange treatment device.
In order to prevent the high-concentration radioactive precipitation sludge from flowing backward, on the basis of the above embodiment, the sewage treatment apparatus may further include: a shut-off valve 6, the shut-off valve 6 being arranged between the eighth connection of the mixing device 3 and the ninth connection of the filter device 5.
On the basis of the above embodiment, the sewage treatment apparatus further includes: and the second flow meter 7 is used for detecting the flow value of the injected radioactive wastewater, the second flow meter 7 comprises a twelfth signal output end and a thirteenth signal output end, the twelfth signal output end and the thirteenth signal output end are respectively used for sending a first flow signal of the injected radioactive wastewater to the second signal input end and the third signal input end, and the first flow signal of the radioactive wastewater contains the flow value of the injected radioactive wastewater.
The embodiment of the invention also provides a sewage treatment method, which is suitable for the sewage treatment device and comprises the following steps:
s101, injecting a first medicament into the reaction device 1 by the first medicament adjusting device 2, and mixing the first medicament and radioactive wastewater by the reaction device 1 to form a first liquid;
s102, the first agent regulating device 2 controls an administration flow rate (or referred to as an administration flow rate) of the first agent according to a flow rate of the injected radioactive wastewater and/or a hydrogen ion concentration index pH value of the first liquid; wherein the formula for calculating the medicine-adding flow of the first medicine can be
Wherein, the first and the second end of the pipe are connected with each other,
Q medicine A The dosing flow of the first metering pump is in L/min;
pH end-final pH value of the reaction apparatus;
pH value in-pH value of radioactive wastewater injected;
M medicine A -the concentration of the agent in the first agent reservoir in mol/L;
Q into The water inlet flow of the radioactive wastewater is L/min.
S103, the second medicament adjusting device 4 injects a second medicament into the mixing device 3, the reaction device 1 injects the first liquid into the mixing device 3, and the mixing device 3 mixes the first liquid and the second medicament to form a second liquid;
s104, the second agent regulating device 4 controls the administration flow rate of the second agent according to the flow rate of the injected radioactive wastewater and/or the flow current value of the second liquid; the formula for calculating the administration flow of the second medicament may be
Wherein the content of the first and second substances,
Q medicine B The dosing flow of the second metering pump is in L/min;
IC-Current flow value in mA;
a is conversion coefficient, unit is mg/L mA;
M medicine B -the concentration of agent in the second agent reservoir in mg/L;
Q into The water inlet flow of the radioactive wastewater is L/min.
S105, the filtering device 5 filters the second liquid.
In the embodiment of the present invention, the first agent adjusting device 2 controls the dosing flow rate of the first agent to the reaction vessel according to the flow rate of the radioactive wastewater and/or the pH of the first liquid. The second agent adjusting device 4 controls the administration flow rate of the second agent to the mixing device 3 according to the flow rate of the radioactive wastewater and/or the flow current value of the second liquid. The sewage treatment method provided by the embodiment of the invention can accurately feed the first medicament and the second medicament, can reduce the medicament cost, can also reduce the generation amount of radioactive precipitates, can reduce the subsequent solid waste disposal cost, and solves the problems that the existing medicament feeding device cannot accurately feed medicaments and the generation amount of the radioactive precipitates is increased due to excessive feeding of the medicaments.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may also be determined from a and/or other information.
In the several embodiments provided in the present application, it should be understood that the disclosed method and apparatus may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A sewage treatment apparatus, comprising: the device comprises a reaction device, a first medicament adjusting device, a mixing device, a second medicament adjusting device and a filtering device;
the reaction apparatus comprises: a reaction container, a first interface for injecting radioactive wastewater into the reaction container, a second interface for injecting a first medicament into the reaction container, and a third interface for outputting a first liquid in which the radioactive wastewater and the first medicament are mixed in the reaction container to the mixing device;
the first medicament adjustment device comprises: a fourth interface for outputting a first medicament to the reaction device, a first signal input for receiving a hydrogen ion concentration index pH value of the first liquid, a second signal input for receiving a first flow signal of the injected radioactive wastewater, the fourth interface being in communication with the second interface; wherein the first medicament adjusting device controls the feeding flow of the first medicament to the reaction container according to the flow of the radioactive wastewater and/or the pH value of the first liquid;
the second medicament adjustment device comprises: a fifth interface for outputting a second medicament to the mixing device, a third signal input for receiving a first flow signal of the injected radioactive wastewater, a fourth signal input for receiving a flowing current signal of a second liquid output by the mixing device; wherein the second medicament adjusting device controls an administration flow rate of the second medicament to the mixing device according to a flow rate of the radioactive wastewater and/or a flow current value of the second liquid;
the mixing device comprises: a sixth port for receiving the first liquid, a seventh port for receiving a second medicament, and an eighth port for outputting a second liquid in which the first liquid and the second medicament are mixed, the sixth port being in communication with the third port, the seventh port being in communication with the fifth port;
the filtering device includes: a ninth port for receiving the second liquid and a tenth port for outputting a third liquid to an external device, the ninth port being in communication with the eighth port.
2. The wastewater treatment apparatus of claim 1, wherein the first agent adjustment device comprises: the first detection device is used for detecting the pH value of the first liquid in the reaction container, and comprises a first metering pump, a first servo motor controller, a first variable-frequency speed regulator and a first medicament storage device;
the first detection device includes: a first signal output end for sending the pH value of the first liquid to the first servo motor controller;
the first servo motor controller includes: the second signal output end is used for sending a first control signal to the first metering pump according to the pH value detected by the first detection device, and the sixth signal input end is electrically connected with the first signal output end;
the first variable frequency governor includes: a seventh signal input for receiving the first flow signal of the injected radioactive wastewater and a third signal output for sending a second control signal to the first metering pump according to the first flow signal of the injected radioactive wastewater;
the first medicament reservoir includes: an eleventh interface for outputting the first medicament;
the first metering pump includes: an eighth signal input electrically connected to the second signal output, a ninth signal input electrically connected to the third signal output, a twelfth port for receiving a first medicament output by a first medicament reservoir, and a thirteenth port for outputting a first medicament, the twelfth port in communication with the eleventh port, the thirteenth port in communication with the second port; the first metering pump controls the dosing flow rate of the first medicament to the reaction vessel according to the first control signal and/or the second control signal.
3. The wastewater treatment apparatus of claim 1, wherein the second agent adjustment device comprises: the second metering pump, the second servo motor controller, the second variable-frequency speed regulator, the second medicament storage and a second detection device for detecting the flowing current value of the second liquid;
the second detection device includes: a fourth signal output for sending a flowing current signal of the second liquid to the second servo motor controller;
the second servo motor controller includes: an eleventh signal input end electrically connected with the fourth signal output end and a fifth signal output end used for sending a fourth control signal to the second metering pump according to the flowing current value of the second liquid;
the second variable frequency governor includes: a twelfth signal input for receiving the first flow signal of the injected radioactive wastewater and a sixth signal output for sending a third control signal to the second metering pump according to the first flow signal of the injected radioactive wastewater;
the second medicament reservoir includes: a fourteenth interface for outputting a second medicament;
the second metering pump includes: a thirteenth signal input electrically connected to the fifth signal output, a fourteenth signal input electrically connected to the sixth signal output, a fifteenth interface for inputting a second medicament, and a sixteenth interface for outputting a second medicament; the fifteenth interface is communicated with the fourteenth interface, and the sixteenth interface is communicated with the seventh interface; the second metering pump controls an administration flow rate of the second medicament to the mixing device according to the third control signal and/or the fourth control signal.
4. The wastewater treatment apparatus according to claim 3, wherein the second detection means comprises: the detection pipeline is provided with a current sensor, a current controller and a first flow regulating valve, wherein the current sensor, the current controller and the first flow regulating valve are arranged on the detection pipeline and are used for detecting the flowing current value of the second liquid in the detection pipeline, one end of the detection pipeline is communicated with the eighth interface of the mixing device, and the other end of the detection pipeline is communicated with the ninth interface of the filtering device;
the current sensor includes: a seventh signal output terminal for transmitting the detected value of the flowing current of the second liquid in the detection pipe to the current controller;
the current controller includes: an eighth signal output terminal electrically connected to the eleventh signal input terminal and a sixteenth signal input terminal electrically connected to the seventh signal output terminal.
5. The wastewater treatment apparatus according to claim 1, further comprising: a shut-off valve disposed between the eighth port of the mixing device and the ninth port of the filtering device.
6. The wastewater treatment apparatus according to claim 1, wherein the filtering apparatus comprises: a circulating pump and a filtering membrane component;
the circulation pump includes: a nineteenth interface used for outputting a fourth liquid mixed by the radioactive sediment filtered by the filtering membrane component and the second liquid, and a twentieth interface communicated with the eighth interface of the mixing device;
the filtration membrane module includes: the first interface is communicated with the first interface, the second interface is communicated with the sludge solidification device, the third interface is communicated with the nineteenth interface, and the first interface is communicated with the second interface.
7. The wastewater treatment apparatus according to claim 6, wherein the filtering apparatus further comprises: a second flow rate regulating valve and a third flow meter for detecting a flow rate of the fourth liquid;
the third flow meter includes: a seventeenth signal input for receiving a second flow signal of the fourth liquid and a ninth signal output for sending the second flow signal of the fourth liquid to the second flow regulator valve;
the second flow rate adjustment valve includes: an eighteenth signal input end electrically connected with the ninth signal output end, a twenty-fourth interface communicated with a nineteenth interface of the circulating pump, and a twenty-fifth interface communicated with a twenty-third interface of the filter membrane component.
8. The wastewater treatment apparatus according to claim 6, wherein the filtering apparatus further comprises: and the third flow regulating valve is arranged between the twenty-second interface of the filter membrane component and the sludge solidification device.
9. The wastewater treatment apparatus according to claim 8, wherein the filtering apparatus further comprises: a densitometer for detecting the density value of the radioactive precipitate filtered through the filter membrane assembly, the densitometer comprising: a tenth signal output for sending the density value of the radioactive deposit to a third flow regulating valve; and when the density value exceeds the set density value, outputting an opening instruction to the third flow regulating valve, and injecting the radioactive deposits into the sludge solidification device through the third flow regulating valve.
10. A method for treating wastewater, which is applied to the wastewater treatment apparatus according to any one of claims 1 to 9, the method comprising:
the first medicament regulating device injects a first medicament into the reaction device, and the reaction device mixes the first medicament with radioactive wastewater to form a first liquid;
the first medicament adjusting device controls the feeding flow of the first medicament according to the flow of the injected radioactive wastewater and/or the hydrogen ion concentration index pH value of the first liquid;
the second medicament regulating device injects a second medicament into the mixing device, the reaction device injects the first liquid into the mixing device, and the mixing device mixes the first liquid and the second medicament to form a second liquid;
the second medicament adjusting device controls the administration flow rate of the second medicament according to the flow rate of the injected radioactive wastewater and/or the flow current value of the second liquid;
the filtering device filters the second liquid.
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| US4923599A (en) * | 1988-06-10 | 1990-05-08 | Southern Water Treatment Co., Inc. | Waste water treatment apparatus |
| CN102838179A (en) * | 2012-10-08 | 2012-12-26 | 北京中环嘉诚环境工程有限公司 | Control method for automatic drug adding device in sewage treatment system |
| CN206558230U (en) * | 2017-02-23 | 2017-10-13 | 江苏宝宸净化设备股份有限公司 | A kind of nuclear power plant's radioactive liquid waste linkage processing unit |
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| US9266084B2 (en) * | 2013-06-13 | 2016-02-23 | Institute Of Nuclear Energy Research | Automatic synthesizer apparatus for producing radiopharmaceutical tumor imaging agent Gallium-68-DOTATATE and method thereof |
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| US4923599A (en) * | 1988-06-10 | 1990-05-08 | Southern Water Treatment Co., Inc. | Waste water treatment apparatus |
| CN102838179A (en) * | 2012-10-08 | 2012-12-26 | 北京中环嘉诚环境工程有限公司 | Control method for automatic drug adding device in sewage treatment system |
| CN206558230U (en) * | 2017-02-23 | 2017-10-13 | 江苏宝宸净化设备股份有限公司 | A kind of nuclear power plant's radioactive liquid waste linkage processing unit |
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