JPS60259165A - Method of control of salt concentration of laver mixture and its device - Google Patents

Abstract

PURPOSE:To control salt concentration of a raw material for laver preparation, by feeding fresh water and sea water to a blender in a ratio to provide a mixed water having a concentration close to a standard value of proper concentration, feeding the fresh water or the sea water depending upon the degree of the concentration of the mixed water. CONSTITUTION:Fresh water is sent from a fresh water tank to a blender for preparing mixed water by the pump P1, and sea water water from a sea water tank to the blender by the pump P2. The pumps P1 and P2 are operated by the drive circuit output signal of a control device for the mixed water to operate by receiving the output of a concentration sensor and a water level sensor, and feed amounts of the sea water and the fresh water, consequently, a feed amount of the mixed water and the concentration of salt are regulated. A large amount of a raw material for laver preparation is fed to a laver manufacturing machine without causing troubles.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for adjusting the salinity of a raw material for making nori that is supplied to a nori 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, adding a small amount of salt to the seaweed raw material improves the yield and improves the color and gloss.
If the salt content is too high, the seaweed may absorb moisture during storage or precipitate during secondary processing, which may impair its quality. Also,
A large amount of seaweed raw material must be continuously supplied to a seaweed machine at all times, and it is difficult to maintain the salt concentration within a specified range.

[Purpose of the invention]

In view of the above-mentioned points, the present invention makes it possible to appropriately adjust the salt concentration 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 large-scale supply. The purpose of this is to improve the yield during nori paper production and the quality of the product nori, such as its color and gloss, as well as to eliminate problems such as moisture absorption during storage and salt analysis during secondary processing. There is.

[Structure of the invention]

In the present invention, after mincing raw seaweed and washing it with water, when mixing the minced seaweed with water in a blender to create a mixture of seaweed and water, the salinity of this water is controlled by a seaweed machine. Determine the appropriate concentration standard value for supply, simultaneously supply freshwater and seawater to the mixing tank at a ratio that will yield mixed water with a concentration close to that value, and when the water level rises to a high level, stop the simultaneous supply, The concentration sensor installed in this mixed water stirring tank detects the concentration of the mixed water, and when the detected concentration is higher than the appropriate concentration range that takes the control width into consideration with the reference value, fresh water is supplied, and the detected concentration is lower than the appropriate concentration range. When the water level is low, seawater is supplied, and 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, freshwater and seawater are supplied simultaneously again. The apparatus according to the present invention has a novel configuration in that it starts with m
! ! A means for supplying fresh water to the cypress, a means for supplying seawater, a means for adjusting the supply amount per hour of each supply means, a sensor for detecting the salt concentration in the adjustment tank, and an oscillation modulation circuit for supplying constant voltage high frequency power to the sensor. , a water level sensor that detects low and high water levels in the adjustment tank, and a low water level sensor signal that outputs an output signal that simultaneously drives the freshwater and seawater lake supply means, and the high water level sensor.

a water level control circuit that stops the output signal based on the sensor signal;
The appropriate salinity concentration range is compared with the measured value of the salinity concentration in the adjustment tank, and when the measured value is greater than the appropriate salinity concentration range, an output signal is output to drive the fresh water supply means, and when the measured value is less than the appropriate concentration range, seawater is supplied. The apparatus is characterized by comprising a salinity concentration control circuit which outputs an output signal for driving the means.

〔Example〕

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

Figure 1 shows the flow sheet 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 other impurities. Thereafter, a mixture of seaweed and water, ie, a seaweed mixture, is made from the minced seaweed in a blender, 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 needed.

In this case, the water is mixed water with a slight amount of salt added, and from the mixed water adjustment tank where the mixed water is stored and adjusted, it is sent to the blender by a pump (P,), and when adjusting the concentration 1; Supplied by pump (P4). The mixed water adjustment tank is supplied with fresh water from the freshwater tank and seawater from the seawater tank by pumps (P) and (pz), respectively.

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 receives the concentration sensor output and drives it, and a concentration control circuit that receives 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.

The pump (Pl) is activated by the drive circuit output signal of the mixed water control device that operates in response to the output of the concentration sensor and water level sensor.
, (P2) are activated to control the supply amounts of fresh water and seawater, and therefore the supply amount and salinity of mixed water. 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.

Figure 2 shows an embodiment of a mixed water salinity adjusting device for carrying out the method of the present invention.
) are installed so that fresh water from the fresh water tank (2) and sea water from the sea water tank (3) are sent and stored by pumps (Pi) and (Pi), respectively.

The mixed water adjustment tank (1) includes a stirrer (4) for stirring the mixed water stored in the tank, a concentration sensor (5) for detecting the salt concentration of the mixed water, and a preset water level in the tank. A water level sensor (6) is installed which operates and issues a signal when the high water level (H level) and low water level (L level) are reached. The mixed water adjustment tank w (7) includes a power supply circuit (8), a single oscillation modulation circuit (9), and a concentration control circuit (10).
, water level control circuit (14), first drive circuit (15),
Second drive circuit (16), display circuit (17), indicator light (
18), an alarm circuit (19), and an alarm buzzer (20). The concentration control circuit (10) consists of a rectifier (ll), an amplifier circuit (12), and a signal discriminator (13). The outputs of the first and second drive circuits (15) and (16) drive pumps (P□) and (P,), which are freshwater and seawater supply means, and the freshwater tank (2) and seawater tank (3) are driven. ) freshwater and seawater are respectively supplied to the mixed water adjustment tank (1).

A valve (vxL (vi)) is placed in the freshwater and seawater supply channels as a means to adjust the supply amount of each, making it possible to adjust the supply amount per hour.Nori and water are supplied to the blender (21). However, the water is pumped from the mixed water adjustment tank (
Pi).

The seaweed mixture is supplied to the seaweed mixture stirring tank (22) from the mixer (21), and if it is necessary to adjust the seaweed concentration here, water for am is supplied from the mixing water adjustment tank (1) to the pump (P4).
) powered by The seaweed mixture stirred and adjusted in the seaweed mixture stirring tank (22) is supplied to the seaweed machine as a raw material for seaweed cutting.

Figure 3 shows an embodiment of the concentration sensor, in which the insulating cylinder (23)
Electrodes (24) and (25) are placed inside the tube at a predetermined interval, the tips of which protrude into the cylinder (23), and the bases embedded in the cylinder to lead out signal lines (24a) and (25a), respectively. do. One of the electrodes, for example (25), incorporates a temperature correction circuit (26) such as a thermistor for sensor output.

FIG. 4 shows an embodiment of a power supply circuit (8) and a single oscillation modulation circuit (9). 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 as a commercial frequency alternating current, rectifies it by 4 degrees, and then converts it to direct current. In this process, a constant voltage circuit is incorporated, and in the subsequent stage, when high frequency is generated, a constant voltage alternating current is obtained. Therefore, within the range of ±20% voltage fluctuation during power supply measurement, there is no effect on the secondary side and concentration measurement is stabilized.

The oscillation modulation circuit (9) receives a DC constant 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 the fifth
Shown in Figure (a). 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 FIG. 5(b). This high frequency output is applied to the electrodes (24) and (25) of the concentration sensor to activate the concentration sensor (5). The output of the concentration sensor (5) is input to the concentration control circuit (1o).

The reason for using a balanced high frequency wave as a sensor power source is 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, and that high frequency measurements require commercial frequency measurements. Temperature-concentration (
The characteristics (water resistance value) are stable and measurement errors due to temperature changes can be reduced. An example of temperature-water resistance value characteristics is shown in the sixth section.
As shown in the figure. 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%, but in both cases, it was found that the degree of change in resistance measurement value is smaller and more stable with high frequency measurement. I understand. 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 even if the frequency is lower than that, at least measurement is possible, although there are differences in the degree of change.

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 concentration reference value in the signal discriminator (13) to determine whether the concentration is within the reference value range. In this case, for example, there are five levels of signals (Sl), (S,)...(S5
), and if it is within the standard value range, it is "good" (S3), and if it is "dark" from the standard value range, it is "dark J (S2), r excessive J (S□)" depending on the degree of concentration difference. Toshi, "thin"
Depending on the degree of concentration difference, side
5).

These five levels of signals are each supplied to a display circuit (17), and one of them is displayed by discrimination. Indicator lights L1 to (S5) correspond to signals (Sl) to (S5).
The status of the detected concentration of mixed water is displayed by lighting either of L and L. That is, Ll, L2, . In addition, there is also a “concentration” signal (S□) or a “undertreatment” signal (
When S,) is issued, the alarm circuit (19) is activated and the alarm buzzer (20) is sounded to notify that the mixed water concentration is "too concentrated" or "not good".

“Darkness” signal (Sl) and [Darkness J signal (8) are the first
The drive circuit (15) is activated, and the "thin" signal (S
l) and the “low treatment” signal (S5) are sent to the second drive circuit (
16) is activated. The first drive circuit (15)
It receives and outputs the aj multiplication signal S2) and the "concentration" signal (Sl), drives the pump (Pl), and supplies fresh water from the fresh water tank (2). Moreover, the second drive circuit (16)
It receives and outputs the "thin" signal (Sl) and the "thin" signal (5S), and drives the pump (P2) to move the seawater tank (3)
Supply more seawater. With a "good" signal (S3), the surface drive circuits (15), (16) are stopped and the pump < p x
> , < p −) co-stop.

The water level sensor (6) includes 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 the L level, the surface drive circuits (16) and (17) are activated to simultaneously drive the pumps (P□) and (P,) to simultaneously supply fresh water and seawater. During this time, the concentration sensor signal is irrelevant.
However, in order to match the supply ratio of freshwater and seawater to the standard concentration,
Adjust the valves (VX) and (V,) to roughly adjust the concentration.

The valves (V The concentration control circuit (lO
) and finely adjust the density using the method described above.

During this time, the mixed water is pumped (Pl) and (Pl) to the blender (21) or seaweed mixture stirring tank (22), respectively.
The water level is gradually lowered. As soon as the water level falls below the L level, the surface drive circuit (1s), (16) is activated to simultaneously supply fresh water and seawater, and the above steps are repeated. In view of the above operation, the concentration sensor (5) should be installed at a position below the L level.

Figure 7 shows concentration and water level control in the mixing water control device;
An example of a drive circuit is shown.

(101), (102) are control power supply terminals, (103)
is a water level detection signal, which is connected to the power terminal (101) in series with the auxiliary relay (m) as a series circuit of the low water level detection signal (103a) (normally closed contact) and the high water level detection signal (103b) (normally closed contact).
), (102). Also auxiliary relay (m)
The self-holding contact (ma□) of is connected in parallel with the signal (103a). Auxiliary relay (m) is water level control circuit (104)
Its auxiliary normally closed contact (m, 2), (ma
) are the freshwater pump (Pl) and the seawater pump (P2), respectively.
) in series and connect between power terminals (101) and (102). (105) and (106) are operating signals when the salt concentration detection signal j (105) is detected as being on the rich side, and (106) as being on the thin side. In this case, they are expressed as contacts that close when activated, and ' The contact points (ma2), (ma3)
are connected in parallel. Although Mira et al.'s circuit is configured as a contact circuit, it is of course possible to configure it as a non-contact circuit.

To explain the operation of the above circuit, the low water level signal (10
When 3a) is activated, the auxiliary relay (m) is activated and the pump (
P engineering), (P,) are driven, and the high water level signal (103b)
When activated, the auxiliary relay (m) opens and the pump (PL
) and (P2) are stopped.

On the other hand, when the “concentration” or “concentration” signal is activated, the pump (
When Pl) is driven and the same signal is lost, it stops. Also,
The pump (P2) is driven when the "low" or "low service" signal is activated, and stops when the signal is lost.

Next, the operation of the thermistor will be explained. Figure 8 shows the internal details of the amplifier circuit (12) (111),
(112) is a power supply terminal to which DC power is applied, and (11
2) side is the ground side. (1, 13) are amplifier input terminals (113a) and reference voltage input terminals (113b)
, and has an output terminal (113c). Input terminal (113a
), the concentration sensor output is input through the rectifier (II).

Terminal (111).

(112), an adjustment resistor (114), a reference voltage dividing resistor (, 115), and a reference voltage fine adjustment resistor (116) are connected in series, and a thermistor (116) is connected in parallel to the adjustment resistor (114).
26). The thermistor (26) is a concentration sensor (
5), and its terminals (26a), (2
6b) is lead-connected to the amplifier circuit (12). The voltage dividing resistor (115) is connected to the amplifier reference voltage input terminal (l
I3b). The amplification factor adjustment circuit connects the voltage dividing terminal (
A fine adjustment resistor (118) connected between the reference voltage input terminal (115a) and the reference voltage input terminal (113b),
It consists of a resistor (119) and a capacitor (120) inserted in parallel between the amplifier output terminal (113c) and the amplifier output terminal (113c). Output terminal (113c) and terminal (112)
A floating voltage suppression resistor (121) is connected between the terminal and the terminal.

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 signal voltage value given to the amplifier input terminal (113a) increases. rises. Therefore, the output signal voltage value of the amplifier (113) increases, and the concentration value apparently moves upward 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 (II:Th), 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 as not to exceed the permissible limit.For example, the set standard value No. is set to 95% of the permissible value Nm, and the control range (plus or minus) is Standard value range width) ΔN is 5%
The upper limit of the management width is NO+ΔN=100%.

As described 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. Additionally, if the concentration exceeds the upper limit control value, a command to supply fresh water is issued, and if the concentration decreases and reaches the upper limit control value, a stop command is issued.

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

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

In that case, the standard value No. will be 0.19%, so if we take the ratio of supply amount when freshwater and seawater are supplied at the same time, assuming that seawater salinity is, for example, 3%, that is, freshwater: seawater = 15:12. Become.

〔Effect of the invention〕

As described above, according to the present invention, the salt concentration of the seaweed mixture supplied to the seaweed machine is easily and automatically adjusted to an appropriate concentration and kept within the specified range, whether the concentration is too high or too low. This improves the yield when making nori sheets and the quality of the product nori, such as its color and gloss, as well as prevents moisture absorption during storage (and reduces problems such as salt analysis during processing). It has various excellent advantages such as eliminating the risk of generation of seaweed, and also not causing any trouble even when a large amount of seaweed raw material is continuously supplied to the seaweed machine.

[Brief explanation of drawings]

Fig. 1 is a flow sheet of a method for adjusting the salinity of a seaweed mixture according to an embodiment of the present invention, Fig. 2 is a block diagram showing an example of an apparatus for adjusting the salinity of a seaweed mixture, and Fig. 3 is a flowchart of a method for adjusting the salinity of a seaweed mixture according to an embodiment of the present invention. 4 is a power supply circuit and oscillation modulation circuit diagram, FIG. 5(a) is an output waveform at point A in FIG. 4, FIG. 5(b) is an output waveform at point B in FIG. 4, 6th
The figure is a temperature (water temperature)-water resistance value characteristic diagram, and FIG. 7 is a diagram of concentration, water level control, and drive circuit diagram in the mixed water control device. (1): Mixed water adjustment tank, C2): Fresh water tank, (3)
: Seawater tank, (4) : Stirrer, (5) : Concentration sensor. (6): Water level sensor, (7): Mixing water control device. (8): Power supply circuit, (9): Oscillation modulation circuit, (10)
: concentration control circuit, (11): rectifier, (12): amplifier circuit. (13): Signal discriminator, (14): Water level control circuit. (15): first drive circuit, (16): second drive circuit. (17): Display circuit, (18): Indicator light, (19)
: Alarm circuit. (20): Alarm buzzer, (21): Compounding machine? (22
): Nori mixture stirring tank, (23): Insulating cylinder,
(24), (25): Electrode. (26): Temperature correction circuit, (p-□), (P2), (
P2), (P4): Pump, (V,), (Vl): Valve, L1-L,: Indicator light. Patent Applicant Togami Electric Manufacturing Co., Ltd. Representative Togami - Fig. 1 Illegal Answer 11j2 Answer 3 Fig. 4 Fig. 5 Fig. 6 Once in 7 (1 in 7; U → Fig. 7 Fig. 8 'It/ 16 +1'5 Procedural amendment voluntarily) 1981 6th Director General of the Japan Patent Office 2. Name of the invention Method for adjusting salinity concentration of seaweed mixture and apparatus 3. Relationship with the case of the person making the amendment Description of the patent applicant's specification "Detailed Description of the Invention" Column 5, Contents of Amendment 1, Page 18 of the "Detailed Description of the Invention" Column in the Specification, Procedural Amendment (Method) % Formula % 1, Indication of the Case 1982 Patent Application No. 116'301 2, Name of the invention Method and device for adjusting the salinity of a seaweed mixture 3, Relationship with the case of the person making the amendment Patent applicant 4, Date of amendment order (shipment date) September 1980 25th, 5th, Subject of amendment 6, Contents of amendment (1) Next to "Concentration, water level control, drive circuit diagram" on page 19, line 10 in the "Brief explanation of drawings" column in the specification. Add the following sentence. ``Figure 8 is a detailed internal diagram of the amplifier circuit.''

Claims (1)

[Claims] 1. After mincing the seaweed raw algae and washing it with water, when mixing the minced seaweed with water in a blender to make a mixture of seaweed and water, the salinity of this water is An appropriate concentration standard value suitable for supplying to a seaweed machine is determined, and freshwater and seawater are simultaneously supplied to the mixing tank at a ratio that will yield mixed water with a concentration close to that value, and when the water level rises to a high level, The simultaneous supply is stopped, and the concentration sensor installed in this mixed water stirring tank detects the concentration of the mixed water. If the detected concentration is higher than the appropriate concentration range considering the control width in addition to the reference value, fresh water is supplied, and the detected concentration 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, and when the water level drops to a low level as the mixed water is supplied to the next stage, it is restarted. A method for adjusting the salinity of a seaweed mixture, characterized by starting the simultaneous supply of freshwater and seawater. 2. A means for supplying fresh water and a means for supplying seawater to the salt and water mixed water adjustment tank, means for adjusting the supply air per hour of each supply means, a sensor for detecting the salt concentration in the adjustment tank, and a sensor for detecting the salt concentration in the adjustment tank. An oscillation modulation circuit that provides a constant-voltage high-frequency power source, a water level sensor that detects low and high water levels in the adjustment tank, output signals that simultaneously drive the fresh water and sea water supply means using the low water level sensor signal, and output signals that simultaneously drive the fresh water and sea water supply means using the high water level sensor signal. A water level control circuit that stops the output signal, compares the appropriate salinity concentration range with the measured value of the salinity concentration in the adjustment tank, and outputs an output signal that drives the fresh water supply means when the measured value exceeds the appropriate salinity concentration range, indicating that the measured value is appropriate. 1. An apparatus for adjusting the salinity of a seaweed mixture, comprising: a salinity control circuit that outputs an output signal to drive a seawater supply means when the concentration is less than a concentration range.