JPS6233856B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for adjusting the salinity of a raw material for making seaweed that is supplied to a seaweed making machine, and an apparatus for carrying out the method.

[Prior art and its problems]

Conventionally, when making seaweed paper, cracks, tears, etc. occurred, resulting in a decrease in yield. In addition, by adding a small amount of salt to the seaweed raw material, the yield is improved.
Although the color and gloss are improved, if the salt content is too high, there is a risk that the seaweed may absorb moisture during storage or precipitate during secondary processing, impairing its quality. In addition, a large amount of raw material for seaweed must be continuously supplied to the seaweed machine at all times, and it is difficult to maintain the salt concentration within a specified range.

For example, as an improved version of this,
There is something like the one shown in the publication, and the publication states that in a mixing tank 3, which mixes the raw seaweed washed by the washing machine 1 and water at a certain ratio, the raw seaweed and water in the tank are mixed. A detector 10 is provided to detect the salt concentration of the mixed liquid, and the washing time or amount of washing water for raw seaweed in the washing machine 1 is automatically controlled according to the salt concentration detection signal from the detector 10, and the salt concentration is within a predetermined range. The values are shown below.

However, this device has the following problems. First of all, seaweed algae generally contain foreign substances such as shells, sand, straw waste, iron powder, etc. When cleaning them, in order to improve the quality of seaweed products, the above-mentioned methods are necessary. It is necessary to remove these impurities at the same time as removing salt due to various reasons, and for this purpose, sufficient washing is required, and after this sufficient washing, the salt content in the seaweed algae is almost zero. There is. Therefore, if the washing process leaves salt behind, the washing process will be incomplete, and the impurities will not be completely removed, leading to a significant deterioration in the quality of the seaweed product.

Second, the mixed liquid of raw seaweed and water in the mixing tank 3, that is, the raw material for making seaweed, needs to maintain an appropriate and uniform concentration of seaweed in order to make the thickness of the seaweed product uniform. In order to keep the seaweed concentration at a predetermined value in the mixed liquid in tank 3, it is necessary to frequently adjust the supply ratio of raw seaweed and water, and each time this adjustment is performed, the salt concentration of the mixed liquid changes and The controller 11 operates in response to the signal from the detector 10 each time to control the washing time or the amount of washing water, but the raw seaweed is fed at a substantially constant rate in order to keep the seaweed concentration constant. Therefore, it is difficult to rapidly improve the salinity concentration in the mixing tank, and eventually the seaweed concentration will be adjusted again and this situation will be repeated, resulting in the salinity being constantly unstable. becomes. That is, it has not been possible to quickly and appropriately control the salinity concentration only by controlling the washing time of raw seaweed or the amount of washing water. in this case,
To correct the salt concentration of the mixture in the mixing tank once mixed, the salt concentration of the raw seaweed and water mixture newly supplied from the washing machine is averaged, and the averaged salt concentration is detected each time. The only way to do this is to gradually approach the appropriate value, and the reaction becomes extremely slow. When the salinity of the raw seaweed and water mixture to be additionally supplied is set within a predetermined range, small corrections will be repeated, making it impossible to quickly correct the salinity. When the value is such that the salt concentration is adjusted in the opposite direction,
Although it is corrected fairly quickly, there is a risk that the salinity concentration will deviate in the opposite direction due to over-adjustment, causing alternating fluctuations on both sides of the predetermined range and hunting, and in any case, quick and stable adjustment cannot be expected, and the Continuously supplying a large amount of seaweed raw material (mixture) required time to control and could not be adapted.

[Purpose of the invention]

In view of the above points, the present invention aims to appropriately and quickly adjust and maintain the salinity of the raw material for making nori paste so as to maintain the salinity of the raw material for making nori paste within a specified range and not to interfere with mass supply. By making this possible, we aim to improve the yield during nori paper production, the color and gloss of the product nori, and eliminate problems such as moisture absorption during storage and salt analysis during secondary processing. That is the purpose.

[Structure of the invention]

The present invention involves mincing raw seaweed, washing it with water, and then mixing the minced seaweed with water in a blender or seaweed concentration adjustment tank to create a mixture of seaweed and water. An appropriate concentration standard value suitable for supplying to the machine or an appropriate concentration range that takes into account the control width is determined based on this standard value, and water that has been adjusted in advance to have a salinity within the appropriate concentration range is used as the water. To adjust the salinity of water, freshwater and seawater are simultaneously supplied to the mixed water adjustment tank at a ratio that will yield mixed water with a salinity within the appropriate concentration range, and when the water level rises to a high level, the simultaneous supply is stopped. The salt concentration of the mixed water in the mixed water adjustment tank is detected by a concentration sensor, and when the detected salt concentration is higher than the appropriate concentration range, fresh water is supplied, and when the detected salt concentration is lower than the appropriate concentration range, seawater is supplied. In either case, when the concentration falls within the appropriate concentration range, the supply will stop, and when the water level drops to a low water level as the mixed water is gradually supplied, the simultaneous supply of fresh water and seawater will start again and the water will reach a high water level. The device according to the present invention uses a constant voltage oscillation modulation signal in the concentration sensor, or has a temperature compensation circuit interposed in the detection circuit of the concentration sensor. means for supplying fresh water to the salt and water mixed water adjustment tank, means for supplying seawater, means for adjusting the supply amount per hour of each supply means, a sensor for detecting the salt concentration in the adjustment tank, and a sensor set to the sensor. An oscillation modulation circuit that provides voltage high-frequency power, a water level sensor that detects low and high water levels in the regulating tank, and a low water level sensor signal that detects fresh water,
A water level control circuit that outputs an output signal that simultaneously drives both seawater supply means and stops the output signal based on a high water level sensor signal, and compares the appropriate salinity concentration range with the measured value of salinity in the adjustment tank and determines whether the measured value is within the appropriate salinity concentration range. It consists of a salinity control circuit that outputs an output signal to drive the fresh water supply means when the measured value is greater than the appropriate concentration range, and a salinity control circuit that outputs an output signal to drive the seawater supply means when the measured value is smaller than the appropriate concentration range, and a temperature compensation circuit for the concentration sensor. It is characterized by incorporating.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 shows a flow sheet of the method and apparatus of the present invention, in which the seaweed is minced by cutting it into small pieces using a mincing machine, and the seaweed is thoroughly washed with water to remove salt and powder. After removing impurities, the minced seaweed is used in a blender to make a mixture of seaweed and water, that is, a seaweed mixture, and this seaweed mixture is temporarily stored in a seaweed mixture stirring tank while being stirred. The concentration can also be adjusted in the stirring tank as necessary. In this case, the water is mixed water with a predetermined concentration with a small amount of salt added, and the mixed water is stored and adjusted from the mixed water adjustment tank to the blender by pump P ₃ , and the water necessary for concentration adjustment is pumped. Supplied by P ₄ . Pumps P ₁ and P ₂ pump fresh water from the fresh water tank and sea water from the sea water tank to the mixed water adjustment tank, respectively.
Powered by. The mixed water adjustment tank is equipped with a concentration sensor that detects the salinity concentration and a water level sensor that detects the water level in the tank.The mixed water control device has a concentration control circuit that operates in response to the concentration sensor output, and a concentration control circuit that operates in response to the output of the water level sensor. It has a water level control circuit that operates based on the concentration control circuit, and a drive circuit that operates in response to the output of the concentration control circuit and the water level control circuit. Pumps P ₁ and P ₂ are operated by the drive circuit output signal of the mixed water control device that operates in response to the outputs of the concentration sensor and water level sensor, and the supply amount of fresh water and seawater, and therefore the supply amount and salinity of mixed water are controlled. controlled. The seaweed mixture from the mixer is fed to a seaweed mixture stirring tank, and the seaweed mixture stirred and adjusted in this stirring tank is supplied to a seaweed machine.

FIG. 2 shows an embodiment of a mixed water salinity adjustment device for carrying out the present invention, in which a mixed water adjustment tank 1 has freshwater from a freshwater tank 2, seawater from a seawater tank 3.
The pumps P ₁ and P ₂ are configured to send seawater to the pumps and store them therein.

The mixed water adjustment tank 1 includes a concentration sensor 5 for detecting the salt concentration of the mixed water of the stirrer 4 that stirs the mixed water stored in the tank, and a high water level (preset water level) in the tank. A water level sensor 6 is installed which operates and issues a signal when the water level reaches the H level) and the low water level (L level). The mixed water control device 7 includes a power supply circuit 8, an oscillation modulation circuit 9, a concentration control circuit 10, a water level control circuit 14, a first drive circuit 15, a second drive circuit 16, a display circuit 17, an indicator light 18, and an alarm circuit. 19, it has an alarm buzzer 20. The concentration control circuit 10 includes a rectifier 11, an amplifier circuit 12, and a signal discriminator 13. The outputs of the first and second drive circuits 15 and 16 drive pumps P ₁ and P ₂ which are freshwater and seawater supply means, and freshwater and seawater are supplied to the mixed water adjustment tank 1 from the freshwater tank 2 and the seawater tank 3, respectively. supplied to Valves V ₁ and V ₂ are placed in the freshwater and seawater supply channels as means for adjusting the respective supply amounts, making it possible to adjust the supply amounts per hour. Seaweed and water are supplied to the blending machine 21, and the water is supplied from a mixing water adjustment tank by a pump _P3 . The seaweed mixture is supplied from the mixer 21 to the seaweed mixture stirring tank 22, and if it is necessary to adjust the concentration of seaweed, water for adjustment is supplied from the mixing water adjustment tank 1 by the pump _P4 . The seaweed mixture stirred and adjusted in the seaweed mixture stirring tank 22 is supplied to a seaweed machine as a raw material for seaweed papermaking.

FIG. 3 shows an embodiment of the concentration sensor, in which electrodes 24 and 25 are placed at a predetermined interval in an insulating cylinder 23, the tips of which protrude into the cylinder 23, and the bases of which are embedded in the cylinder and provide signals respectively. 24a and 25a are derived. One of the electrodes, for example 25, incorporates a temperature correction circuit 26 such as a thermistor for the sensor output.

FIG. 4 shows an embodiment of the power supply circuit 8 and the oscillation modulation circuit 9. In FIG. The power supply circuit 8 supplies AC power to each circuit of the control device, and also includes a rectifier circuit 8a and a constant voltage circuit 8b.
DC power and constant voltage power are supplied through the

The power supply circuit 8 receives power at a commercial frequency AC, rectifies it, and once converts it to DC, but a constant voltage is incorporated in this process, and when high frequency is generated in the subsequent stage, a constant voltage AC is obtained, and the power supply side If the voltage fluctuation is within ±20%, there is no effect on the secondary side, making concentration measurement stable.

The oscillation modulation circuit 9 receives a constant DC voltage and obtains a predetermined high frequency output using an oscillation circuit 9a such as an astable multivibrator. The output waveform at this output end point A is shown in FIG. 5a. In this case, the frequency may be fixed or variable. Further, the reference level is adjusted by a reference level adjustment circuit 9b including a resistor, a capacitor, etc., so as to obtain a high frequency output with positive and negative balance. The output waveform at this output end point B is shown in Figure 5b.
Shown below. This frequency output is applied to the electrode 2 of the concentration sensor.
4 and 25 to activate the concentration sensor 5. The output of the concentration sensor 5 is input to the concentration control circuit 10.

The reasons for using a balanced high frequency wave as a power source for the concentration sensor are that if a direct current component is included, the mixed water will electrolyze and the generated gas will adhere to the electrodes, causing measurement errors. This is because the temperature-concentration (water resistance value) characteristics are more stable than in measurements, and measurement errors due to temperature changes can be reduced. An example of temperature-water resistance value characteristics is shown in FIG. The characteristics of water resistance values measured by high frequency measurement and commercial frequency measurement were shown for the case of salinity concentration of 0.05 to 3%, and it can be seen that in both cases, the degree of change in the resistance measurement value is smaller and more stable with high frequency measurement. . It has been confirmed that good results can be obtained when the frequency of this high-frequency power source is about 1 KHz or higher, and at least measurement is possible even at lower frequencies, although there are differences in the degree of change. Additionally, if the power supply voltage fluctuates, the current value and therefore the apparent detected salinity concentration value will fluctuate for the same resistance value, making accurate detection impossible and making proper control impossible. A constant voltage circuit for the power supply is required for proper control.

The input signal to the concentration control circuit 10 is a rectifier 11,
The signal is processed by the amplifier circuit 12 and compared with a preset density reference value in the signal discriminator 13 to determine whether the density falls within the reference range. In this case, for example, a five-level signal S ₁ , S ₂ ...S ₅ is emitted, and if it is within the reference range, it is "good" S ₃ , and if it is on the "dark" side of the reference value range, it is "dark" depending on the degree of density difference. '' S ₂ and ``over-dark'' S <sub>1</sub> , and the ``thin'' side is designated as ``thin'' S <sub>4</sub> and ``over-thin'' S ₅ depending on the degree of density difference.

These five levels of signals are each supplied to the display circuit 17, and one of them is displayed by discrimination. Indicator light L ₁ according to this signal S ₁ ~ _{S 5}
~L ₅ lights up to display the detected mixed water concentration status. That is, _L1 , _{L2 ,} . Also, the “concentration” signal S ₁ or the “concentration” signal
When _S2 is issued, the alarm circuit 19 is activated and the alarm buzzer 20 sounds to notify that the mixed water concentration is "too concentrated" or "too thin".

The "too dark" signal S ₁ and the "too dark" signal S ₂ actuate the first drive circuit 15 , and the "light" signal S ₄ and the "too light" signal S ₅ actuate the second drive circuit 16 . urge The first drive circuit 15 receives a “dark” signal S ₂
and “concentration” signal S ₁ is received and output, and pump P ₁
is driven to supply fresh water from the fresh water tank 2. Further, the second drive circuit 16 receives and outputs the "thin" signal S ₄ and the "too thin" signal S ₅ to drive the pump P ₂ to supply seawater from the seawater tank 3. The supply of fresh water and seawater continues until the above signal is lost. With the "good" signal _S3 , both drive circuits 15, 16 are stopped and pumps _P1 , _P2 are also stopped.

The water level sensor 6 has a high water level electrode 6a for detecting a high water level (H level) and a low water level electrode 6b for detecting a low water level (L level). When the water level falls below L level, both drive circuits 15 and 16 are activated to simultaneously drive pumps P ₁ and P ₂ to simultaneously supply fresh water and sea water. During this time, the signal from the concentration sensor is ignored, and the concentration is roughly adjusted by adjusting the valves V ₁ and V ₂ so that the supply ratio of freshwater and seawater matches the reference concentration.

The valves V ₁ and V ₂ are generally adjusted manually, but they can also be controlled by electric signals or the like as a power method.

When the water level reaches the H level, the supply of both fresh water and sea water is stopped, and from this point on, discrimination is made by the concentration control circuit 10 based on the signal from the concentration sensor 5, and the concentration is finely adjusted using the method described above.

During this time, the mixed water is supplied to the blender 21 or the seaweed mixture stirring tank 22 by pumps P ₃ and P ₄ , respectively, and the water level gradually decreases. As soon as the water level falls below the L level, both drive circuits 15 and 16 are activated to simultaneously supply fresh water and seawater, and the above steps are repeated. In view of the above operation, the mounting position of the concentration sensor 5 is preferably below the L level.

FIG. 7 shows an example of the concentration and water level control and drive circuit in the mixed water control device.

101 and 102 are control power terminals, 103 is a water level detection signal, and a power terminal 10 is connected in series with the auxiliary relay m as a series circuit of a low water level detection signal 103a (normally open contact) and a high water level detection signal 103b (normally closed contact).
Connect between 1 and 102. Also, the self-holding contact ma ₁ of the auxiliary relay m is connected in parallel with the signal 103a. The auxiliary relay m is provided in the water level control circuit 104, and its auxiliary normally open contacts ma ₂ and ma ₃ are connected in series with the fresh water pump P ₁ and the sea water pump P ₂ , respectively, and connected to the power terminal 1.
Connect between 01 and 102. 105 and 106 are salt concentration detection signals, 105 is an activation signal when the rich side is detected, and 106 is an activation signal when the thin side is detected. In this case, they are represented as contacts that close when activated, and the respective contacts
Connected in parallel with ma ₂ and ma ₃ . Although these circuits are configured as contact circuits, it is of course possible to configure them as non-contact circuits.

To explain the operation of the above circuit, when the low water level signal 103a is activated, the auxiliary relay m is activated and the pumps P ₁ and P ₂ are driven, and when the high water level signal 103b is activated, the auxiliary relay m is opened and the pumps P ₁ and P 2 are activated. Stop driving ₂ .

On the other hand, when the "concentration" and "overconcentration" signals are activated, the pump _P1 is driven, and when the signal is lost, the pump P1 is stopped.
Also, when the “concentration” or “concentration” signal is activated, the pump
If _P2 is driven and the same signal is not lost, it will stop.

Next, the operation of the thermistor will be explained. FIG. 8 shows the internal details of the amplifier circuit 12.
Reference numerals 111 and 112 are power terminals to which DC power is applied, and the 112 side is the ground side. 113 is an amplifier with an input terminal 113a and a reference voltage input terminal 11
3b and an output terminal 113c. Input terminal 11
The concentration sensor output is input to 3a via a rectifier 11. An adjustment resistor 114, a reference voltage dividing resistor 115, and a reference voltage fine adjustment resistor 11 are installed between the terminals 111 and 112.
6 are connected in series, and the thermistor 26 is connected in parallel to the adjustment resistor 114. The thermistor 26 is attached to the concentration sensor 5, and its terminal 26
a, 26b are lead-connected to the amplifier circuit 12. Voltage dividing terminal 115 located between both terminals of voltage dividing resistor 115
A is connected to the reference voltage input terminal 113b of the amplifier via the amplification factor adjustment circuit. The amplification factor adjustment circuit includes the voltage dividing terminal 115a and the reference voltage input terminal 113b.
It consists of a fine adjustment resistor 118 connected between the reference voltage input terminal 113b and the amplifier output terminal 113c, a resistor 119 and a capacitor 120 inserted in parallel between the reference voltage input terminal 113b and the amplifier output terminal 113c. A floating voltage suppression resistor 121 is connected between the output terminal 113c and the terminal 112.

Here, the action of the thermistor will be explained. The concentration of the mixed water is determined by measuring the resistance value between the electrodes using the concentration sensor 5, but as the water temperature rises, the resistance value decreases and the amplifier input terminal 113a
The signal voltage value given to increases. Therefore amplifier 1
The output signal voltage value of No. 13 increases, and the concentration value apparently moves toward the "dense" side due to the rise in water temperature.

The resistance of the thermistor decreases as the water temperature rises, the potential at the reference voltage dividing point 115a increases, and the potential at the amplifier reference voltage input terminal 113b increases. This increase in the potential of the reference voltage input reduces the potential difference between the input terminal 113a and the reference voltage input terminal 113b, thereby compensating for the increase in the amplifier input voltage due to the water temperature rise.

Compensation can be made in the same way even if the water temperature drops. In this manner, the output signal voltage of the amplifier is prevented from varying due to changes in water temperature.

As mentioned above, if the salt concentration is too high, it will harm the quality of seaweed products, so it must be managed so that it does not exceed the permissible limit.For example, the set standard value No. is the permissible value Nm.
The plus or minus control range (standard value range for good) △N is 5%, and the upper limit of the control range is No +
△N=100%.

As mentioned above, the control range is determined, and when the concentration falls below the lower limit control value, a seawater supply command is issued, and when the concentration increases and reaches the lower limit control value, a stop command is issued, and when the concentration exceeds the upper limit control value, a command to stop the supply of seawater is issued. issue a supply order for
When the concentration drops to the upper limit control value, a stop command is issued.

Note that the setting reference value No. is set using a fixed impedance or variable impedance built into the device, but it is made so that it cannot be adjusted arbitrarily.

The standard value to be set is determined by industry consensus, but the allowable value Nm is generally considered to be around 0.2%.

In that case, the standard value No. will be 0.19%, so if we calculate the ratio of supply amount when freshwater and seawater are supplied simultaneously, assuming that the salinity of seawater is 3%, for example, B x 3 (%) / A + B = 0.19 (%) ) A/B = 14 (approximate number) A: Freshwater supply amount B: Seawater supply amount In other words, freshwater: seawater = 14:1.

As described above, the method and apparatus of the present invention quickly and appropriately adjust the salinity of the raw material for nori cutting, and the first feature is that nori and When making a mixture with water, the seaweed raw algae is minced, washed with water, and then mixed with the minced seaweed using mixed water with a predetermined salinity.The second feature is to obtain this mixed water. freshwater and seawater are simultaneously supplied at a predetermined ratio up to a predetermined water level, and after reaching a high water level, freshwater or seawater is supplied according to the concentration detection signal to quickly adjust the concentration, and then When the ship descends, fresh water and sea water are supplied simultaneously again, making it possible to constantly supply a large amount of mixed water.

The method for adjusting the concentration of the seaweed mixture in the mixer 21 and the seaweed mixture stirring tank 22 is omitted here, but for example,
There is something like the one shown in the publication. The mixed water adjustment tank 1, blender 21, and seaweed mixture stirring tank 22 of the present invention are the water tank 4, blender 2, and concentration adjustment tank 1 in the same publication.
correspond to each.

The water tank 4 in the same publication merely stores water (fresh water), but in the present invention, this water is given a predetermined salinity concentration, so fresh water and sea water are collected from the fresh water tank 2 and the sea water tank 3. supply,
A circuit for controlling the supply amount is provided, and this control circuit is provided in addition to the circuit shown in Figure 2 of the same publication, and during nori cutting work, the seaweed concentration adjustment operation described in the same publication and the salinity concentration adjustment operation of the present invention are provided. These are carried out in parallel, and together they complete the desired seaweed cutting work.

In the present invention, when freshwater and seawater are supplied to the mixed water adjustment tank 1 and the salt concentration of the mixed water is adjusted to an appropriate range, freshwater or seawater is supplied according to the concentration difference detection signal between the detected value and the appropriate value. Since seawater is continuously supplied and the salinity concentration is quickly adjusted, even if a large amount of mixed water is used, mixed water with the appropriate salinity concentration can be continuously supplied. Mixed water with a salinity concentration is used for blending with seaweed in the blender 21 and for adjusting the concentration of seaweed in the seaweed mixture in the seaweed mixture stirring tank 22. It can maintain the salt concentration within an appropriate range at all times and can continuously supply a large amount. In this case, since the low water level detection level L is set relatively high and the water level difference from the high water level is small, the amount of simultaneous supply can be suppressed, and even if there is some fluctuation in the concentration of the simultaneous supply, Care has been taken to ensure that the effect on the overall amount is small and the overall concentration is within an appropriate range. Therefore, in both the simultaneous supply (rough adjustment) and concentration adjustment (fine adjustment) processes, the salt concentration of the mixed water is always maintained within an appropriate range, and the salt concentration of the seaweed mixture is also maintained appropriately at all times.

〔Effect of the invention〕

As described above, according to the present invention, in the method for adjusting the salt concentration of a seaweed mixture, the raw seaweed is minced and washed with water, and then the minced seaweed is mixed with water in a blender or a seaweed concentration adjustment tank to form seaweed. When making a mixture of seaweed and water, determine a standard value for the appropriate concentration of salinity suitable for supplying this mixture to the seaweed machine, or an appropriate concentration range that takes into account the control range based on this standard value, and set the appropriate concentration range for the water in advance. Since we used water adjusted to a range of salinity,
The salinity concentration of the seaweed mixture supplied to the seaweed machine can be automatically adjusted and maintained within the appropriate concentration range at all times, and there is no problem even if a large amount of seaweed material is continuously supplied to the seaweed machine. There is no.

In addition, when adjusting the salinity of water, fresh water and seawater are simultaneously supplied to the mixed water adjustment tank at a ratio that allows mixed water with a salinity within the appropriate concentration range to be obtained.
When the water level rises to a high level, the simultaneous supply is stopped, the salt concentration of the mixed water in the mixed water adjustment tank is detected by a concentration sensor, and when the detected salt concentration is higher than the above-mentioned appropriate concentration range, fresh water is supplied and the detected salinity is When the concentration is lower than the appropriate concentration range, seawater is supplied, and in either case, when the concentration falls within the appropriate concentration range, the supply is stopped.
As mixed water is gradually supplied, when the water level drops to a low water level, the simultaneous supply of fresh water and seawater is started again and continues until the water level reaches a high water level.
The salinity of the mixed water can be quickly adjusted and maintained within the appropriate range at all times, and even when a large amount of mixed water is used in the mixer or seaweed mixture stirring tank, mixed water with the appropriate salinity can be continuously supplied. , it is possible to correspond to the continuous supply of the raw material for making seaweed.

In addition, since the salt concentration of the mixed water in the mixed water adjustment tank is detected via a concentration sensor using a constant voltage oscillation modulation signal and a temperature compensation circuit based on the temperature of this mixed water, the signal power supply for the concentration sensor By using a constant voltage, it is possible to prevent measurement errors caused by fluctuations in the power supply voltage, and by using an oscillation modulation signal such as a high frequency wave with positive and negative balance as the concentration sensor power supply, it is possible to prevent the electrolysis gas at the electrodes of the concentration sensor. Measurement errors due to influences can be prevented, and measurement errors due to temperature fluctuations of the mixed water can be prevented by the temperature compensation circuit, so accurate salt concentration detection values can be obtained and appropriate salinity concentration control can be performed.

By integrating the above, we can improve the yield during the nori machine and the quality of the product nori, such as color and gloss, and eliminate the risk of problems such as moisture absorption during nori storage and salt analysis during processing. In addition, it has various effects such as the ability to continuously supply a large amount of seaweed raw material to a seaweed machine without causing any problems.

[Brief explanation of the drawing]

Fig. 1 is a flow sheet of a method and apparatus for adjusting the salinity of a seaweed mixture according to an embodiment of the present invention, Fig. 2 is a block diagram showing an embodiment of the apparatus for adjusting the salinity of a seaweed mixture, and Fig. 3 is a flowchart of a method and apparatus for adjusting the salinity of a seaweed mixture. 4 is a diagram of the power supply circuit and oscillation modulation circuit; FIG. 5 a is the output waveform at point A in FIG. 4; FIG. 5 b is the output waveform at point B in FIG. 4; FIG. 6 is a cross-sectional view of the sensor. is a temperature (water temperature)-water resistance value characteristic diagram, and Figure 7 is a diagram of concentration, water level control, and drive circuit in the mixing water control device.
FIG. 8 is a detailed internal diagram of the amplifier circuit. 1: Mixed water adjustment tank, 2: Freshwater tank, 3: Seawater tank, 4: Stirrer, 5: Concentration sensor, 6: Water level sensor, 7: Mixed water control device, 8: Power supply circuit,
9: Oscillation modulation circuit, 10: Concentration control circuit, 11:
Rectifier, 12: Amplification circuit, 13: Signal discriminator, 1
4: Water level control circuit, 15: First drive circuit, 1
6: Second drive circuit, 17: Display circuit, 18: Indicator light, 19: Alarm circuit, 20: Alarm buzzer, 2
1: Blender, 22: Seaweed mixture stirring tank, 23: Insulating cylinder, 24, 25: Electrode, 26: Temperature correction circuit, P ₁ , P ₂ , P ₃ , P ₄ : Pump, V ₁ , V ₂ : Bulb, L ₁ ~ L ₅ : Indicator light.

Claims (1)

[Claims] 1. After mincing the seaweed raw algae and washing it with water, the minced seaweed is mixed with water in a blender or seaweed concentration adjustment tank to make a mixture of seaweed and water. An appropriate salt concentration standard value suitable for supplying to the seaweed cutting machine or an appropriate concentration range that takes into account the control range is determined based on this standard value, and water that has been adjusted in advance to have a salinity within the appropriate concentration range is used as the water. At the same time, in order to adjust the salinity of this water, freshwater and seawater are simultaneously supplied to the mixed water adjustment tank at a ratio that will yield mixed water with a salinity within the appropriate concentration range, and when the water level rises to a high level, The supply is stopped, the salt concentration of the mixed water in the mixed water adjustment tank is detected by a concentration sensor, and when the detected salt concentration is higher than the appropriate concentration range, fresh water is supplied, and the detected salt concentration is lower than the appropriate concentration range. In either case, the supply is stopped when the concentration falls within the appropriate concentration range, and when the water level drops to a low level as the mixed water is supplied to the next stage, fresh water and seawater are supplied simultaneously again. A method for adjusting the salinity of a seaweed mixture, characterized by starting the process. 2. The method for adjusting the salt concentration of a seaweed mixture according to claim 1, characterized in that the concentration sensor is driven by a constant voltage high frequency power source. 3. A method for adjusting the salinity concentration of a seaweed mixture according to claim 1 or 2, characterized in that a temperature compensation circuit is provided in the detection circuit of the concentration sensor. 4 Means for supplying fresh water and seawater to the mixed water adjustment tank for salt and water, means for adjusting the supply amount per hour of each supply means, a sensor for detecting the salt concentration in the mixed water adjustment tank, mixed water a water level sensor that detects low and high water levels in the adjustment tank; a water level control circuit that outputs an output signal that simultaneously drives both freshwater and seawater supply means based on the low water level sensor signal; and stops the output signal based on the high water level sensor signal; Compare the salt concentration range with the measured salt concentration in the mixed water adjustment tank, and when the measured value is greater than the proper salt concentration range, output a signal to drive the fresh water supply means, and when the measured value is smaller than the proper concentration range, output a signal to drive the fresh water supply means. A salinity concentration adjusting device for a seaweed mixture, comprising a salinity concentration control circuit that outputs an output signal to drive a seawater supply means. 5. The apparatus for adjusting the salt concentration of a seaweed mixture according to claim 4, characterized in that the drive circuit for the salt concentration sensor in the mixed water adjustment tank is a constant voltage high frequency power source. 6. The apparatus for adjusting the salinity concentration of a seaweed mixture according to claim 4 or 5, characterized in that a temperature compensation circuit is incorporated into the salinity sensor in the mixed water adjustment tank.