KR100297365B1 - Phase separation detector for solvent extraction - Google Patents

Abstract

The present invention relates to a phase separation detection device for solvent extraction in which two solutions can be separated using different resistance components of two liquids from a solution in which an electrolyte and a non-electrolyte contained in a separation vessel are mixed during solvent extraction. A square that passes through the mixed liquid through the oscillation unit 210 generating a square wave signal and supplying it to the first electrode horizontally contained in the lower end of the separation vessel, and the second electrode formed at a lower distance from the first electrode. In order to relatively increase the rate of change of the detection and absolute value smoothing unit 220 that detects, smoothes and amplifies a wave signal at a DC level, and the detection level of the DC level detected from the detection and absolute smoothing unit 220. A level adjuster 230 that variably adjusts and outputs a DC level, a level of a detection signal from the level adjuster 230, and a preset reference value A comparison unit 240 for outputting a comparison control signal indicating a time of extraction and extraction of the mixed solution based on a comparison of the control unit; a control unit 250 for outputting a driving control signal for opening / closing a valve based on the comparison control signal; First and second solenoid valves each having an inlet connected to a bottom surface of the separation vessel 100 and switching between outputs based on a level of a driving control signal of the control unit to discharge the electrolyte and the non-electrolyte to their outlets, respectively. Including (300,400), it is possible to automate solvent extraction to obtain radioisotopes and the like.

Description

Phase separation detection device for solvent extraction {PHASE SEPARATION DETECTOR FOR SOLVENT EXTRACTION}

The present invention relates to a phase separation detection device for solvent extraction, and in particular, in order to automatically separate two liquids from a solution in which an electrolyte (aqueous layer) and a non-electrolyte (organic layer) are mixed during solvent extraction, the difference between the resistance components of the two liquids. The present invention relates to a phase separation detection device for solvent extraction, which enables the separation of two liquids by automatically detecting a phase in which two solutions are separated.

Today, the range and technology of radioisotopes is developing rapidly.

Currently, more than 1000 companies using radioisotopes are radiodestructive tests, radioisotope gauges, industrial radiotracers, in-vivo diagnosis and treatment, in-vitro diagnostics, in-vitro irradiation treatment, radiation sterilization, radiation food research, and radiation genetic engineering research. The use of radioactive isotopes in various forms contributes to enormous contributions such as industrial technology development, productivity improvement, pollution prevention, industrial safety, medical technology development and welfare implementation, food production and food conservation, and basic science development. It is true.

In order to increase the self-sufficiency of the radioisotopes required in Korea, multipurpose research reactors have been developed in order to increase the supply of radioactive isotopes in order to achieve overall development in science and technology such as industrial technology, medical technology, basic science, industrial safety, and environmental conservation. In addition, as a part of research and development for mass production of radioisotopes using medium-sized nuclear reactors, auxiliary equipment suitable for mass production has also been developed.

In other words, since the production efficiency of radioisotopes cannot be increased in the manner used in the related art, accompanying development of ancillary equipment or a handling device was required.

Developed as one of these ancillary equipment is a chemical treatment device for radioisotopes by solvent extraction.

It is based on the rate at which solutes are partitioned between two unmixed solvents and is one of the most commonly used methods for separating different nuclides. This method is simple, fast and very selective. In addition, it is widely used irrespective of non-radioactivity since there is no big problem with many and few substances to be separated. The easiest and most widely used solvent extraction method is the separation of solutes by aqueous and organic layers. Complex ions, common ions, counterion ligands, synergists, and the like can be added to the solvent to increase diversity and selectivity of separation. In addition, satisfactory separation can be achieved by controlling the pH index, adjusting the salt concentration, changing the amount and composition of the solvent, and changing the temperature. The recovery of the nuclide to be separated is carried out in the organic layer, mainly by evaporation and, in the case of recovery in the aqueous layer, by back extraction. This method is particularly widely used for the production of radioisotopes and for the separation and recovery of uranium and plutonium from nuclear fuel after the use of nuclear reactors.

On the other hand, by using the extraction method described above solvent raw material _{(MoO 3, Y 2 O 3} ) to to the neutron irradiation in a nuclear reactor nuclide (Tc-99m, Sr-89 ), the first irradiation source material to produce (MoO ₃ , Y ₂ O ₃ ) and the aqueous solution (NaOH, HNO ₃ ) are sufficiently stirred, and then a predetermined amount of the prepared organic solvent is added to a predetermined separation vessel, and then the mixed aqueous solution is added to the separation vessel for a predetermined time for phase separation. In this case, an organic layer (non-electrolyte) containing a nuclide to be extracted is formed on the upper part of the separation vessel, and an aqueous layer (electrolyte) is formed on the lower part.

At this time, only the organic layer is separated, and the separated organic phase is sequentially passed through a filter, a resin, and an adsorption column, and eluted with an eluent to produce a radioisotope.

However, in the related art, there is no method of automatically separating and obtaining only the organic layer required in the phase separated water layer and the organic layer, and thus there is a problem that acts as a major obstacle to the overall automation of the radioactive isotope extraction method.

Accordingly, in the present invention, in order to automatically separate the above-described water layer and the organic layer, a method of using the difference between the resistance components of the water layer and the organic layer was sought.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to resist separation of two liquids from a solution in which an electrolyte (aqueous layer) and a non-electrolyte (organic layer) are mixed during solvent extraction. It is to provide a phase detection separation apparatus for solvent extraction to automatically detect the solvent by separating the two liquids by automatically detecting the phase in which the two solutions are separated using the difference of.

1 is a schematic diagram of a device including a phase separation detection device for solvent extraction according to the present invention.

2 is a block diagram of a phase detection separation apparatus for solvent extraction according to the present invention.

3 is a detailed circuit diagram of the oscillator 210 of FIG.

4 is a detailed circuit diagram of the detection and absolute smoothing unit 220 of FIG.

5 is a detailed circuit diagram of the level adjuster 230 of FIG.

6 is a detailed circuit diagram of the comparison unit 240 of FIG.

FIG. 7 is a detailed circuit diagram of the controller 250 of FIG.

* Explanation of symbols for main parts of the drawings

100 separation vessel 200 phase separation detection device

210: oscillation unit 220: detection and absolute value smoothing unit

230: level control unit 240: comparison unit

250: control unit 300, 400: first and second solenoid valve

The phase detection separation apparatus for solvent extraction according to the present invention is a device for separating and extracting a mixed liquid of an electrolyte and a non-electrolyte contained in a separation vessel, and generates a predetermined square wave signal to horizontally immerse a first electrode at a lower end of the separation vessel. A detection and absolute smoothing unit for detecting, smoothing and amplifying a square wave signal passing through the mixed liquid through a second electrode formed at a lower distance from the first electrode at a predetermined interval from the first electrode; A level adjuster which variably adjusts and outputs a DC level of the detection signal in order to relatively increase the rate of change of the detection signal of the DC level from the detection and absolute value smoothing unit; Outputting a comparison control signal indicative of the time of separation extraction of the mixed liquid based on comparison with a reference value A comparison unit, a control unit for outputting a driving control signal for opening and closing a valve based on the comparison control signal, and an inlet connected to a bottom surface of the separation vessel, respectively, and output opening and closing based on the level of the driving control signal of the control unit It is characterized in that it comprises a first, second solenoid valve is switched to each other and discharge the electrolyte and the non-electrolyte to the outlet, respectively.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of a device including a phase separation detection device for solvent extraction according to the present invention, which includes a separation funnel 100, a phase separation detection device 200, and a first and second solenoid valves. 300,400).

In the figure, the separation container 100 is a funnel-type container for separating and extracting the electrolyte and the non-electrolyte in the mixture state in which the electrolyte and the non-electrolyte are mixed.

The phase separation detecting apparatus 200 inserts and installs the first and second electrodes at a predetermined interval vertically to the lower end of the separation vessel 100, generates and outputs a predetermined square wave signal to the first electrode, and then A drive control signal for opening and closing the first and second solenoid valves 300 and 400 is output based on the square wave signal applied through the mixed solution.

On the other hand, the first and second solenoid valves (300, 400) are connected to the bottom of the separation vessel 100, respectively, the inlet, based on the drive control signal of the phase separation detection device 200, the opposite opening and closing control each separated electrolyte Drain the non-electrolyte into each outlet.

Next, FIG. 2 is a block diagram of a phase separation detection device for solvent extraction according to the present invention, and FIG. 3 is a detailed circuit diagram of FIG. 2, and the phase separation detection device for solvent extraction according to the present invention includes an oscillator 210. ), A detection and absolute value smoothing unit 220, a level adjusting unit 230, a comparator 240, and a control unit 250.

In this configuration, the oscillator 210 generates a predetermined square wave signal and supplies it to the first electrode PR1 contained horizontally at the lower end of the separation vessel, and the other side of the capacitor C1 having one side connected to the ground is an OP amplifier. Zener diode ZD2 and Zener diode connected to the inverting terminal of U1, connected to the output of the OP amplifier U1 to the first electrode PR1, and connected to the ground in a reverse direction to the zener diode ZD1 The resistor R1 connected to ZD2) is fed back to the inverting terminal (-) of the OP amplifier U1, and the resistor R2 connected to the ground and the OP amplifier U1 are connected to the non-inverting terminal (+) of the OP amplifier U1. The resistor R4 and the resistor R3 sequentially connected to the output of the capacitor are fed back, and the capacitor is configured to be connected between the resistor R1 and the resistor R4 between the resistor R1 and the zener diode ZD2. When the voltage at both ends of the charging and discharging of C1 reaches the threshold voltage Vt, the output of the OP amplifier U1 is reached. It is inverted, and outputs the result, a square wave pulse.

In addition, the detection and absolute smoothing unit 220 detects the square wave signal passing through the mixed solution through the second electrode PR2 formed at a lower distance from the first electrode PR1, and then absolute, amplifies, and smoothes it. Output at DC level, the input voltage (Ei) from the second electrode (PR2) is connected to the inverting terminal (-) of the OP amplifier (U2) through the resistor (R5), the non-inverting terminal (+) is grounded, The reverse diode (D2) and the resistor (R6) are sequentially connected to the output of the OP amplifier (U2) and fed back to the inverting terminal (-), and the forward diode (D1) is connected to the output of the op amp (U2) and the reverse diode (D2). Connected between them, and returned to the inverting terminal (-), a resistor R9 connected between the reverse diode D2 and the resistor R6, and a resistor R8 in which the input voltage Ei and the resistor R7 are sequentially connected. Connect with and configure.

In addition, the resistance (R8, R9) is connected to the inverting terminal (-) of the OP amplifier (U3) and the non-inverting terminal (+) is connected to the ground to the output of the OP amplifier (U3) to the level control unit 230. It is configured to connect the smoothing capacitor (C2) and the variable resistor (R10) for varying the amplification degree in parallel with the OP amplifier (U3).

In addition, the level adjusting unit 230 variably adjusts and outputs the DC level of the detection signal in order to relatively increase the rate of change of the detection signal of the DC level from the detection and absolute value smoothing unit 220, and the detailed circuit is configured to detect and The input voltage Ei applied from the absolute value smoothing unit 220 is connected to the inverting terminal (-) of the OP amplifier U4, and the non-inverting terminal (+) is connected to the variable resistor R13 connected to a predetermined amount of power. It is connected to the contact between the resistor (R14) connected to the negative power supply, and the resistor (R12) is fed back to the inverting terminal (-) to the output of the OP amplifier (U4).

In addition, the output of the OP amplifier U4 is connected to the inverting terminal (-) of the OP amplifier U5 through the resistor R15, and the non-inverting terminal (+) is connected to the ground, and to the output of the OP amplifier U5. The resistor R16 is fed back to its inverting terminal (−) and configured to apply the output of the OP amplifier U5 to the comparator 240.

On the other hand, the comparator 240 outputs a comparison control signal indicating the point of time of separation extraction of the mixed solution based on the comparison of the level of the detection signal from the level adjuster 230 with a predetermined reference value, and the level adjuster 230 Is connected to the inverting terminal (-) of the OP amplifier U6 through the resistor R17, and the resistor R19 and ground connected to the predetermined driving power source Vcc at the non-inverting terminal (+). Connect the contact between the variable resistor (R20) connected to, and the output voltage (Eo) of the OP amplifier (U6) to the control unit 250 as a comparison control signal and the output of the OP amplifier (U6) and the resistor (R21) It is configured by returning to the inverting terminal (-) through the resistor (R18), it is configured by connecting the zener diode (ZD4) connected to the ground and connected to the zener diode (ZD3) in the reverse direction between the resistors (R18, R20).

The control unit 250 outputs a driving control signal for controlling the opening and closing of the first and second solenoid valves 300 and 400 based on the comparison control signal of the comparator 240, and the detailed circuit configuration thereof includes a comparison unit ( The input voltage Ei from 240 is connected to the base of the PNP type transistor Q1 through the resistor R22, and a predetermined driving power supply Vcc is connected to the emitter thereof, and the collector is connected to the coil of the relay RY1. Both switch contacts of the relay RY1 connected to the ground and selectively connected to the ground contact the output terminal OUT1 when the coil is energized to turn on the first solenoid valve 300 for passing the electrolyte solution and to the second solenoid valve. 400 turns off the relay RY1 to turn off the second solenoid valve 300 which contacts the output terminal OUT2 and passes the non-electrolyte solution when the coil is not energized and turns on the first solenoid valve 400. ) The switch opening and closing display light emitting diodes (LED1, LED2) connected to the predetermined driving power supply (Vcc), respectively, are connected to each of the switch contacts of the relay (RY1) between each of the light emitting diodes (LED1, LED2). It is connected to each switch contact of the relays RY2 and RY3 to be selectively connected to the output terminals OUT1 and OUT2 based on the driving on / off.

In addition, when using a plurality of phase separation detection devices, a selection terminal SEL for activating / deactivating the input / output of the phase separation detection device is connected to one coil side of the relays RY2 and RY3, respectively, and a predetermined driving power supply Vcc is provided on the other side of the coil. The connection is configured to enable / disable the relays RY2 and RY3 by the selection terminal SEL.

In addition, the first and second electrodes PR1 and PR2 may be electrically separated from the oscillation unit 210 and the detection and absolute smoothing unit 220 by the selection terminal SEL, respectively. U10).

Next, the operation of the phase separation detection device for solvent extraction according to the present invention having the above-described configuration will be described in detail.

First, the oscillator 210 generates (+) / (-) bidirectional square wave (square wave) to supply the first electrode PR1 to measure the resistance or voltage drop of the electrolyte. The reason for using is that when the first electrode PR1 has a positive polarity, the negative ions of the electrolyte move toward the first electrode PR1, and the positive ions of the electrolyte have a negative polarity. This is because the detection and movement of the absolute value smoothing unit 220 to the second electrode PR2 causes the resistance to continue to increase with time.

The operating principle of the oscillator 210 is that when the power source (+ 12V, -12V) is turned on, the capacitor C1 repeats charging and discharging, and the voltage at both ends thereof changes, and this voltage is at a constant level (threshold voltage: Vt). The output is rapidly inverted each time it arrives, so that the periodic signal of the square wave appears at the output to which the first electrode PR1 is connected.

In more detail, first, when the output of the OP amplifier U1 is a positive voltage, the capacitor C1 starts to charge through the resistor R1, and the voltage between both ends thereof increases. The output of the OP amplifier U1 rapidly reverses and becomes a negative voltage.

Next, when the output of the OP amplifier U1 becomes a negative voltage, the capacitor C1 starts discharging and the voltage between both ends drops, and when the voltage reaches the reverse polarity (-Vt) of the threshold voltage again, The output of the OP amplifier U1 is inverted to become a positive voltage. This process is repeated to create a positive (+/-) square wave pulse signal.

The threshold voltage is | Vt | = (Vz + 0.7) × R2 / (R2 + R3), which is about 3.29V in the preferred embodiment of the present invention, and the frequency of the square wave pulse is −1 / (2 × C1 × R1 × ln (R3 / (2xR2 + R3))), which is approximately 2.3 KHz.

Next, the above-described square wave pulse is passed through the solution of the separation vessel 100 and applied to the detection and absolute smoothing unit 220 through the second electrode PR2, wherein the applied voltage waveform is dependent on the type of the solution. In other words, it has different voltage levels depending on the resistance of the solution. However, the alternating supply of forward and reverse currents minimizes the effect of electrolysis and can be virtually ignored in practice.

In addition, a process of converting the detected voltage in the form of a forward / reverse pulse into a measurable DC voltage is required. That is, the square wave pulse voltage of (+/-) 2 to 3 V is converted into an absolute voltage.

Therefore, the detection and absolute value smoothing unit 220 actually has three functions. First, the absolute value of the input signal is obtained, the second is amplified, and the third is smoothed to make a more perfect DC signal.

First, a capacitor C2 is used for the smoothing action.

Second, a variable resistor (R10) was used to amplify the signal. By adjusting the variable resistor (R10), the voltage at the test point (TP1) was 10V when the electrolyte (NaOH) solution was added.

Finally, in order to take the absolute value of the (+/-) pulse signal, first, the circuit composed of the first OP amplifier U2 is a pure diode circuit and operates only in one direction, that is, when the input voltage Ei is a positive voltage. In other words, if the input voltage Ei is a positive voltage, diode D2 is turned on to operate the OP amplifier (U2), and the moment the input voltage Ei changes to a negative voltage, the diode D2 is cut off and the diode D1 is turned on. The OP amplifier U2 is then returned to zero return.

Therefore, when the output voltage Eo is E> 0, Eo = ((R10 × R8) / (R7 × R9) -R6 / (R5 + R6)) × Ei, and when E <0, Eo = -R10 / (R5 + R6) x Ei.

Now, if the resistors R5, R6, R7, R8, and R9 are all used at the same value, and the variable resistor R10 is twice its value, Eo = Ei when E> 0 and Eo = -Ei when E <0. The voltage Eo is the absolute value of the input voltage Ei.

Further, if the value of the variable resistor R10 is further increased, the output value is amplified by that amount, and the smoothing capacitor C2 is used to smooth the minute change of the output value.

Meanwhile, the output voltage Eo of the detection and absolute smoothing unit 220 is applied to the input voltage Ei of the level adjuster 230 through the above-described process.

On the other hand, the voltage at the test point P1 is set to 10V with respect to the electrolyte NaOH solution by adjusting the variable amplification variable R10 described above. Through experiments in this state, if the voltage change at the moment when the electrolyte / non-electrolyte (NaOH / MEK) solution separation line passes through the upper first electrode PR1 of the separation vessel 100, the value is continuously changed. This makes it impossible to make accurate measurements, but you can see that about 3V drops.

In other words, the voltage change at this moment changes from 10V to 7V. To capture this moment, we can capture the moment when the voltage is lower than this voltage in comparison with any voltage in the middle, for example, 8.75V. have.

In other words, if the rate of change for this initial voltage becomes larger, that is, if the current rate of change of about 30% from 10V to 7V is increased to 60%, the instant capture will be more reliable.

Therefore, the level adjusting unit 230 is a subtraction circuit for changing the change from 10V to 7V into a change of 5V to 2V to relatively increase the change rate. At this time, the output voltage Eo = − (R12 / R11) × Ei1 + (R14 / R13) × Ei2 becomes equal, that is, the output voltage level can be adjusted by using the variable resistor for the resistor R13. The first OP amplifier (U4) used as a subtraction circuit is operated so that the measured value at the test point (TP3) is -5V for the electrolyte (NaOH) solution, and the second OP amplifier (U5) inverts the signal level. It is to let.

Next, the signal whose level is adjusted through the output terminal Eo of the level adjuster 230 is transmitted to the input terminal Ei of the comparator 240 based on the above-described process.

On the other hand, the signal detected through the second electrode (PR2) to obtain the absolute value, and the smoothed, amplified and level-controlled signal is now finally compared to the reference voltage as mentioned above the electrolyte / non-electrolyte in the separation vessel 100 The moment when the separation line of the (NaOH / MEK) solution passes through the upper first electrode PR1 is captured.

The reference voltage is obtained by adjusting the variable resistor R20 so that the measured value at the test point (TP2) is 3.75V. At this time, the output voltage (Eo) of the OP amplifier (U6) outputs 5V when the input voltage (Ei) is greater than 3.75V, 0V if less than this. This output signal Eo is used to drive the desired solenoid valves 300 and 400 eventually.

Next, the signal from the output terminal Eo of the comparator 240 is transmitted to the input terminal Ei of the controller 250 through the above-described process.

The controller 250 is for driving a desired solenoid by using a 0V signal change at 5V obtained as a result of the measurement.

The following points were taken into account as control requirements.

1. Drives two 24V solenoids for NaOH and MEK emissions, which work in reverse. That is, when the first solenoid valve 300, which is a solenoid for electrolyte (NaOH), is opened, the second solenoid valve 400, which is a solenoid for nonelectrolyte (MEK), is closed, and conversely, when the solenoid valve for electrolyte (NaOH) is closed, The solenoid for MEK) is opened.

2. When performing various types of solution separation using a single separation system, use several onboard phase separation detection devices connected to the same electrode (PR1, PR2) and solenoids (300,400) as needed. In this case, you need to specify which board you want to use.

3. Have a display (LED) indicating which board is currently selected and which solution is currently being separated and discharged in the NaOH / MEK solution.

First, a 5V drive relay is used to drive each solenoid.

The output signal 5V to 0V from the comparator 240 obtains a current value required for driving the relay RY1 through the transistor Q1 to drive the relay RY1.

In order to use several boards in a separate system, it is necessary to be able to connect or disconnect input / output wires to the board as necessary.

Therefore, when the selection signal SEL is applied, when the selection signal is connected to the collector ground terminal of the transistor Q2 LOW, the system and the first and second electrode lines PR1 and PR2 are connected to the analog switches U7 and U8. By, U9 and U10, output lines OUT1 and OUT2 are connected by relays RY2 and RY3. When this signal goes high, all input / output lines on this board are separated from the system.

At this time, the opening and closing states of the respective solenoid valves 30 and 400 can be checked through the light emitting diodes LED1 and LED2, and all the input / output lines on the board can be checked whether the I / O lines on the board are separated from the system through the light emitting diodes LED3. .

Next, the operation of the above-described phase separation detection apparatus is summarized. In order to separate the two liquids from the mixed solution of the electrolyte NaOH and the non-electrolyte MEK, the resistance value of each solution is measured.

As a result of the measurement, since the non-electrolyte (MEK) solution has a larger resistance value than the electrolyte (NaOH) solution, the solution is separated by comparing the resistance value.

In the case of the electrolyte, (+) ions move toward the (-) electrode and (-) ions move toward the (+) electrode. As a result, the resistance value of the electrolyte continues to increase with time.

To avoid this phenomenon, a (+/-) 12V square wave signal is generated at each electrode and supplied to the first electrode PR1, which is a measuring needle. That is, the waveform of the signal at the first electrode PR1 becomes a square wave pulse having a level of + 12V and -12V, and the waveform that has passed through the solution in the separating vessel 100, that is, the square detected by the second electrode PR2. The wave pulse has a level of, for example, + 2V and -2V, whose signal level is reduced according to the resistance component value of the solution.

The detected square wave pulse is converted into a DC signal, and smoothed and amplified to make a measurement voltage. In this case, when only the electrolyte (NaOH) solution passes, the voltage at the test point P1 becomes 10V so that the variable resistor R10 can be obtained. Will be adjusted.

Through experiments, this voltage drops to 6-7V when the electrolyte / non-electrolyte (NaOH / MEK) solution separation line passes through the upper first electrode PR1 of the separation vessel 100, and this separation line is the upper side in the separation vessel 100. When passing between the first electrode PR1 and the lower second electrode PR2, the voltage dropped to 5 to 6V, and when the separation line passed through the lower second electrode PR2, it was observed to fall to 2 to 3V. .

The phase separation detecting apparatus according to the present invention is designed to separate the solution at the time when the separation line passes through the upper first electrode PR1.

In addition, a variable resistor (R13) was used to adjust the signal level of the measured voltage detected and absolute smoothed through the solution. That is, it adjusts to -5V at the test point TP3 with respect to the electrolyte solution NaOH. By doing so, when the electrolyte / non-electrolyte solution separation line passes through the upper first electrode PR1, the voltage fluctuation is adjusted to drop from -2 to -3V at the test point TP3. By comparing this voltage fluctuation with the reference voltage, the moment when the electrolyte / non-electrolyte separation line passes through the upper first electrode PR1 is captured, and at this time, the relay RY1 is cut off and the output signals OUT1 and OUT2 are output to the outside. .

If the solenoid for electrolyte and the non-electrolyte solenoid are connected to this output line, the two solutions can be separated.

On the other hand, two outputs OUT1 and OUT2 are output from one relay RY1, OUT1 is normally open, OUT2 is normally closed, and the first solenoid valve which is a solenoid for electrolyte at OUT1 ( 300) and a second solenoid valve 400 which is a non-electrolyte solenoid to OUT2.

In addition, the two outputs OUT1 and OUT2 are again disconnected or connected by a selection terminal (SEL) signal. That is, by first sending a signal to the selection terminal SEL, i.e., connecting the selection terminal SEL to ground, the output signal from the phase separation detection device according to the invention which is onboard is selected or enabled and measured and Separation operation will be started.

As described above, according to the present invention, in the process of separating and extracting radioactive isotopes from raw materials not radioactive by neutron irradiation, the electrolyte and non-electrolyte mixed solution can be automatically detected and separated to extract radioactive materials. The effect is to automate the process.

While the invention has been shown and described with respect to particular embodiments, it will be understood by those skilled in the art that various modifications and changes can be made without departing from the spirit and scope of the invention as indicated by the appended claims. Anyone can grow up easily.

Claims (7)

An apparatus for separating and extracting a mixed solution of an electrolyte and a non-electrolyte contained in the separation vessel 100, An oscillation unit 210 for generating a predetermined square wave signal and supplying it to the first electrode PR1 horizontally contained in the lower end of the separation vessel; Detecting and smoothing and amplifying a square wave signal passing through the mixed solution through a second electrode PR2 formed at a lower distance from the first electrode PR1 and outputting it at a DC level. 220; A level adjusting unit 230 for adjusting and thrusting the DC level of the detection signal in order to increase the rate of change of the detection signal of the DC level from the detection and absolute value smoothing unit 220; A comparator 240 for outputting a comparison control signal indicating a time point for separating and extracting the mixed liquid based on a comparison between an output signal level of the level adjuster 230 and a preset reference value; A controller 250 for outputting a driving control signal for opening / closing a valve based on the comparison control signal; The first inlet is connected to the bottom of the separation vessel 100, respectively, and the output opening and closing are switched to each other based on the level of the drive control signal of the control unit 250 to separate and discharge the electrolyte and the non-electrolyte solution to the outlet, respectively. Phase separation detection device for solvent extraction, characterized in that comprises a two solenoid valve (300, 400). The oscillator 210 of claim 1, wherein the other side of the capacitor C1 having one side connected to the ground is connected to the inverting terminal (-) of the OP amplifier U1, and the output of the OP amplifier U1 is connected to the first side. The zener diode ZD1 connected to the electrode PR1, connected to the ground, the zener diode ZD2 connected thereto in the reverse direction, and the resistor R1 connected thereto are fed back to the inverting terminal (-) of the OP amplifier U1, and OP Phase separation detection for solvent extraction, characterized in that the resistor R2 connected to the ground is connected to the non-inverting terminal (+) of the amplifier U1 and the resistor R3 connected to the output of the OP amplifier U1 is fed back. Device. The method of claim 1, wherein the detection and absolute smoothing unit 220 is connected to the inverting terminal (-) of the OP amplifier (U2) via the resistor (R5) the input voltage (Ei) from the second electrode (PR2). And the non-inverting terminal (+) is grounded, and the reverse diode (D2) and the resistor (R6) are sequentially connected to the output of the OP amplifier (U2) to return to the inverting terminal (-), and the forward diode (D1) is connected to the OP amplifier. It is connected between the output of U2 and the reverse diode D2 and returned to the inverting terminal (-), and the resistor R9 connected between the reverse diode D2 and the resistor R6 is connected to the input voltage Ei and the resistor ( R7) is connected to the sequentially connected resistor R8, and between the resistors R8 and R9 is connected to the inverting terminal (-) of the OP amplifier U3 and the non-inverting terminal (+) is connected to the ground to connect the OP amplifier ( The output of U3) is applied as an output signal and is configured by connecting a smoothing capacitor (C2) and a variable resistor (R10) for varying amplification degree in parallel with the OP amplifier (U3). Phase separation detection device for solvent extraction, characterized in that. 2. The non-inverting terminal of claim 1, wherein the level adjusting unit 230 connects the input voltage Ei applied from the detection and absolute smoothing unit 220 to the inverting terminal (−) of the OP amplifier U4. +) Is connected to a contact between a variable resistor (R13) connected to a predetermined positive power supply and a resistor (R14) connected to a predetermined negative power supply, and a resistor (R12) is connected to the output terminal of the op amp (U4). ), The output of the OP amplifier U4 is connected to the inverting terminal (-) of the OP amplifier U5 through the resistor R15, the non-inverting terminal (+) is connected to the ground, and the OP amplifier U5 Resistor (R16) to the output terminal of the inverting terminal (-) and the output of the OP amplifier (U5) configured to apply to the comparing unit 240, characterized in that the phase separation detection device for solvent extraction. The non-inverting device of claim 1, wherein the comparator 240 connects the input voltage Ei from the level adjuster 230 to the inverting terminal (−) of the OP amplifier U6 through the resistor R17. The terminal (+) connects a contact between a resistor R19 connected to a predetermined driving power supply Vcc and a variable resistor R20 connected to ground, and controls the output voltage Eo of the OP amplifier U6 as a comparison control signal. And the output of the OP amplifier U6 is returned to the inverting terminal (-) through the resistor R21 and the resistor R18, and is connected to the ground and connected to the zener diode ZD3 in the reverse direction. A phase separation detection device for solvent extraction, comprising a diode (ZD4) connected between resistors (R18, R20). 2. The control unit 250 is configured such that the input voltage Ei from the comparator 240 is connected to the base of the PNP transistor Q1 through a resistor R22, and the emitter has a predetermined driving power supply. (Vcc), the collector is connected to the ground through the coil of relay (RY1), and both switch contacts of the relay (RY1), which are selectively connected to the ground, are contacted to the output terminal (OUT1) when the coil is energized to The second solenoid valve 300 is turned on and the second solenoid valve 400 is turned off, and when the coil is not energized, the second solenoid valve contacts the output terminal OUT2 to pass the non-electrolyte solution. 300) and the phase separation detection device for solvent extraction, characterized in that configured to turn on the first solenoid valve (400). 7. The light emitting diodes LED1 and LED2 for valve opening and closing, respectively connected to a predetermined driving power source Vcc, are connected to both switch contacts of the relay RY1 of the controller 250, respectively. Between LED1, LED2) and each switch contact, it is connected to each switch contact of relays (RY2, RY3) so as to be selectively connected to output terminals (OUT1, OUT2) based on the driving on / off of relay (RY1). The select terminal SEL for activating / deactivating the input / output of the phase separation detection device is connected to one side of the coils of the relays RY2 and RY3, respectively, and a predetermined driving power supply Vcc is connected to the other side of the coil to the select terminal SEL. It is configured to enable / disable the relays RY2 and RY3, and the first and second electrodes PR1 and PR2 are also detected by the selection terminal SEL and the oscillation unit 210 and the detection and absolute smoothing unit, respectively. Each analogue to be electrically isolated from 220 Phase separation detecting device that is configured to be connected to the switch (U7, U8, U9, U10) for the solvent extraction, characterized.