JP5990826B1 - Liquid supply device with adjusted salt concentration - Google Patents

Abstract

The present invention provides a liquid supply device with adjusted salt concentration that can supply a highly accurate salt concentration continuously and stably. SOLUTION: Salt water is injected into a tank 10 from a salt water pipe 21 through a salt water flow rate adjustment valve 23, and water is injected from a water pipe 31 through a water flow rate adjustment valve 33 to store a mixed liquid ML. Concentration adjustment tank 1 and the circulation pipe 4 for returning the mixed liquid extracted from the lower part thereof into the adjustment tank, the circulation pump CP provided in the circulation pipe, and the middle of the same pipe 4 or in the adjustment liquid mixture The concentration detection means 5 provided with the salt concentration sensor 51 and the temperature sensor 52 for correcting the liquid temperature of the mixed liquid, and the flow rate of the water flow rate adjustment valve 33 and the flow rate of the salt water flow rate adjustment valve 23 based on the salt temperature correction concentration The control means 6 for controlling the salt concentration of the mixed liquid in the adjustment tank, the supply tank 7 for receiving the adjusted liquid AL that has been adjusted in the adjustment tank, and the supply tank and the adjustment tank are connected. A feed pipe 8 and a liquid feed pump SP provided in the middle of the feed pipe 8 are provided. [Selection] Figure 1

Description

  The present invention relates to a salt concentration adjusted liquid supply device for supplying a liquid in which salt water such as seawater is adjusted to a predetermined salt concentration.

For example, sherbet-shaped fine ice made of salt water such as seawater may be used to maintain freshness of fresh seafood. In simple seawater, the freezing temperature becomes too low, and in some fish species the eyes become cloudy or the surface of the fish freezes, so it is difficult to maintain freshness for a long time, adjustment that is diluted and adjusted to the prescribed salt concentration Used liquid is used.
There is another demand for such a salt concentration adjusting solution, and several device inventions for adjusting the salt content of mixed water of fresh water and seawater have been proposed (for example, Patent Document 1).

JP-A-11-282544

However, as described in the claims, Patent Document 1 compares “... a detector that detects the salinity of mixed water and a salinity obtained from the detection signal of the detector and a predetermined salinity. And a control unit including a comparison circuit and an adjustment circuit for adjusting the adjustment valve. This control is to determine the manipulated variable based on the deviation between the set value and the measured value by the detector, and disturbance occurs, and the mixed water with the deviation measured by the detector remains as it is even if it is outside the target value. There is a problem of being supplied as an adjusted liquid. It has become difficult to apply to a fine ice making machine that needs to supply a highly accurate salinity continuously and stably. Patent Document 1 states that in paragraph 0014, “by providing the mixing mixer 14, fresh water and seawater are mixed uniformly”, but for the highly accurate salinity concentration required for the ice making machine, In the mixing mixer 14, there is a possibility that homogenization is not sufficiently satisfied. Furthermore, the measurement accuracy of the salinity concentration by the detector downstream of the mixing mixer may be affected.
In addition, since substances that dissolve into water such as a salt concentration and become ions easily flow when dissolved, it is common to measure the electrical conductivity and convert it into a concentration. Patent Document 1 is presumed to be the same from the description in paragraph 0015. However, since such a salinity concentration sensor has a measurement error due to the temperature of the measurement object, there is a problem that an accurate salinity concentration cannot be determined unless the temperature is corrected.

  The present invention solves the above-described problems, and an object of the present invention is to provide a salt concentration-adjusted liquid supply device capable of continuously and stably supplying salt water with improved accuracy of salt concentration.

In order to achieve the above object, the gist of the invention described in claim 1 is that salt water (SW) injected into the tank (10) from the salt water pipe (21) through the salt water flow rate adjusting valve (23), Water (W) injected from the water pipe (31) through the water flow rate adjustment valve (33), a salt concentration adjustment tank (1) for storing a mixed liquid (ML), and the adjustment tank (1) A circulation pipe (4) arranged so as to return the mixed liquid (ML) extracted from the lower portion back into the adjustment tank (1), and a circulation pump (CP) provided in the middle of the circulation pipe (4) ), And a salt concentration sensor (51) based on electrical conductivity inserted in the circulating pipe (4) or in the mixed liquid (ML) of the adjustment tank (1) and the liquid of the mixed liquid (ML) Concentration detection means (5) provided with a temperature sensor (52) for temperature correction, and the flow rate of the water flow rate adjustment valve (33) and the salt water flow rate adjustment based on the temperature correction concentration of salinity by the concentration detection means (5) The flow rate of the valve (23), and the salt concentration of the mixed liquid (ML) in the adjustment tank (1). Salinity concentration control means (6) for adjusting the degree, supply tank (7) for receiving the adjusted liquid (AL) after adjustment of the salt concentration in the adjustment tank (1), and the supply tank (7) And a feed pipe (8) connecting the adjustment tank (1), and a liquid feed pump (SP) provided in the middle of the feed pipe (8). Located in the adjusted liquid supply device.
According to a second aspect of the present invention, there is provided a liquid supply device with adjusted salt concentration according to the first aspect of the present invention, wherein an inlet circulation pipe section (4) relating to the circulation pipe (4) from the lower part of the adjustment tank (1) to the circulation pump (CP) ( 41) and the circulation pump (CP), and the feed pipe section (81) and the liquid feed pump (SP) related to the feed pipe (8) from the adjustment tank (1) to the liquid feed pump (SP) And a circulation pipe section (42) related to the circulation pipe (4) arranged to return the mixed liquid (ML) from the circulation pump (CP) back into the adjustment tank (1). A three-way valve (9) is provided in the middle, and a feed-out piping part (82) related to the feed pipe (8) from the three-way valve (9) to the supply tank (7) is provided, and the three-way valve ( The adjusted liquid (AL) in the adjustment tank (1) is fed into the supply tank (7) by the switching operation of 9). The liquid supply device with adjusted salt concentration according to the invention of claim 3 is the liquid supply device according to claim 1 or 2, in the middle of the outlet circulation pipe section (42) related to the circulation pipe (4) on the outlet side of the circulation pump (CP). The salinity concentration sensor (51) and the liquid temperature correcting temperature sensor (52) are inserted. According to a fourth aspect of the present invention, there is provided a salt concentration-adjusted liquid supply apparatus according to the first to third aspects, wherein the salt water injection port (210) into which salt water (SW) is injected from the salt water pipe (21) into the adjustment tank (1). And the water inlet (310) through which water (W) is injected into the adjustment tank (1) are turned away from each other in the tank (10) near the side peripheral wall (11) of the adjustment tank (1). Further, the extraction port (410) of the circulation pipe (4) for extracting the mixed liquid (ML) from the lower part of the adjustment tank (1) has a salt water injection port (210) and a water injection port (310). It is characterized by being arranged at a location that is far away from both sides and equidistant from both sides.

  The salinity-adjusted liquid supply device of the present invention can provide a set salinity concentration liquid required by the salt water use destination continuously and stably with high accuracy, and the apparatus can be compactly provided at a low price. Excellent effect for quality improvement and cost reduction.

It is the flow block diagram by one form of the salt concentration adjusted liquid supply apparatus of this invention. It is a schematic plan view of the liquid supply apparatus with adjusted salt concentration. (A) is a plan view showing the positional relationship between the salt water piping, water piping and circulation pump of FIG. 2, (b) is a longitudinal sectional view near the bottom wall of the adjusting tank showing the positional relationship between the salt water inlet and the water inlet. is there. It is a schematic front view of the liquid supply apparatus with adjusted salt concentration. It is a flowchart figure of the control circuit in one Embodiment of this invention. It is a flow block diagram of the adjusted liquid supply apparatus of the salt concentration of the other aspect replaced with FIG. FIG. 4 is a schematic plan view of a salt concentration-adjusted liquid supply apparatus according to another embodiment instead of FIG. 2. It is a related figure of electrical conductivity and salt solution concentration. It is a related figure of salt water temperature and electrical conductivity.

  Hereinafter, the salt concentration-adjusted liquid supply apparatus according to the present invention will be described in detail. FIGS. 1 to 9 show one embodiment of the liquid supply apparatus with adjusted salt concentration (hereinafter also simply referred to as “adjusted liquid supply apparatus”) according to the present invention. FIG. 3 is a plan view of the liquid supply device, FIG. 3A is a positional relationship diagram of the salt water piping, water piping, and circulation pump of FIG. 2, FIG. 3B is a positional relationship diagram of the salt water inlet and the water inlet, and FIG. FIG. 5 is a flow chart of the control circuit in one embodiment of the present invention, FIG. 6 is a flow configuration diagram of an adjusted liquid supply apparatus according to another mode instead of FIG. 1, and FIG. Fig. 8 is a schematic plan view of an adjusted liquid supply apparatus according to another embodiment instead of Fig. 8, Fig. 8 is a relationship diagram between electric conductivity and saline concentration, and Fig. 9 is a relationship diagram between salt water temperature and conductivity. In each drawing, the components of the present invention are emphasized and simplified.

  The adjusted liquid supply device for salt concentration includes an adjustment tank 1, a salt water supply means 2, a water supply means 3, a circulation pipe 4, a concentration detection means 5, a salt concentration control means 6, a supply tank 7, and a feed pipe 8. (FIG. 1). These components are compactly assembled to a frame formed of a frame F as shown in FIGS.

The adjustment tank 1 is a tank that accumulates a mixed liquid ML (mixed water) of injected salt water SW and water W and is used for adjusting a set salt concentration. The salt water SW is injected into the tank 10 through the salt water pipe 21 through the salt water flow adjustment valve 23, and the water W is injected into the tank 10 through the water pipe 31 through the water flow adjustment valve 33.
The present invention includes an adjustment tank 1 for adjusting the salinity concentration, and a supply tank 7 (described later in detail) for receiving the salt concentration liquid that has been adjusted in the adjustment tank 1 and maintaining the supply at a set concentration without concentration fluctuations. , Let them share their roles. The adjustment tank 1 is a concentration adjustment tank for making a salt concentration adjustment liquid set by concentration control while injecting salt water SW and water W into the tank 10 and accumulating the mixed liquid ML. Then, the supply tank 7 transfers and stocks the adjusted liquid AL stored in the adjustment tank 1 stored at the set salinity, and supplies the salt to the equipment such as an ice making machine that requires the predetermined salinity. It plays a role as a reservoir tank for the adjusted liquid AL that does not fluctuate. The mixed liquid ML and the adjusted liquid AL are not sent directly from the adjusting tank 1 to the equipment such as an ice making machine.

In the adjustment tank 1, salt water SW and water W are injected into the tank 10 as described above in order to adjust the salinity concentration. For example, when the seawater W is used in a fishing port or the like, the saltwater SW is sucked by the ginger seawater pump provided in the fishing port, and the saltwater pipe 21 is used to filter 26, a shutoff valve 22, and a saltwater flow rate adjustment valve 23. To the adjustment tank 1 (FIG. 1). For example, when tap water is used as the water W, the main water pipe 31 connected to the tap water pipe is led into the adjusting tank 1 through the shutoff valve 32 and the water flow rate adjusting valve 33. On the upstream side of the salt water side shut-off valve 22, a manual flow rate adjustment valve (not shown) is provided as appropriate in order to match the flow rate of tap water.
The salt water pipe 21 and the water pipe 31 that lead into the adjustment tank 1 of the present embodiment are arranged so that their tips are close to the bottom wall 19 of the adjustment tank. And the salt water inlet 210 into which the salt water SW is injected into the adjustment tank 1 and the water inlet 310 into which the water W is injected into the adjustment tank 1 are formed on the side peripheral wall 11 of the adjustment tank 1 as shown in FIG. It arrange | positions so that it may face each other in the nearby tank 10. This is to increase the mixing efficiency of the salt water SW and the water W. In addition, although illustration is abbreviate | omitted, an elbow etc. may be attached to the salt water inlet 210 and the water inlet 310, respectively, and you may distribute | arrange both inlets so that the back may mutually turn.

The circulation pipe 4 is a pipe arranged to return the mixed liquid ML extracted from the lower part of the adjustment tank 1 back into the adjustment tank 1. The salt water SW injected from the salt water inlet 210 and the water W injected from the water inlet 310 become a mixed liquid ML and accumulate in the adjustment tank 1. In order to make the mixed liquid ML uniform, a static mixing mixer as in Patent Document 1 is not sufficient. Although it is conceivable to separately install a stirrer or the like having a stirring blade, the apparatus cost increases. Therefore, the present invention provides the circulation pipe 4 and makes the mixed solution ML drawn out from the lower part of the adjustment tank 1 one time and mixes them, thereby making the mixed solution ML uniform and simple.
Further, the extraction port 410 of the circulation pipe 4 for extracting the mixed liquid ML from the lower part of the adjustment tank 1 is separated from both sides more greatly than the interval L1 between the salt water injection port 210 and the water injection port 310 as shown in FIG. And it is made to arrange | position on the surrounding wall 11 of the substantially diagonal position where distance L2, L3 from both is equal. The uneven flow from the injected salt water SW or the injected water W is prevented, and the mixed liquid ML is aimed to be more uniform.

  The circulation pump CP is a pump provided in the middle of the circulation pipe 4. The mixed liquid ML extracted from the lower part of the adjustment tank 1 is returned to the adjustment tank 1 by the pump pressure. Here, the tip return port of the circulation pipe 4 is further extended to near the bottom of the tank 10, and the mixed liquid ML that has passed through the circulation pipe 4 is released near the bottom of the tank 10. This is to prevent foaming when the seawater W is used as the salt water SW and to enhance the mixing and stirring effect of the mixed solution ML.

The concentration detecting means 5 includes a salinity concentration sensor 51 based on electrical conductivity inserted in the middle of the circulation pipe 4 or in the mixed liquid ML of the adjustment tank 1, and a temperature sensor 52 for correcting the liquid temperature of the mixed liquid ML. It is a detector. The salt concentration sensor 51 based on electrical conductivity is used as the salt concentration measurement of the mixed solution ML accumulated in the adjustment tank 1 by the injection of the salt water SW and the water W, as shown in FIG. This is because the electrical conductivity is substantially proportional to the amount of inorganic salts dissolved therein, and is easy to handle and easy to measure. Further, the concentration detecting means 5 having the temperature sensor 52 for correcting the liquid temperature is used to correct the temperature by correcting the electric conductivity (electrical conductivity) as the salt water temperature changes as shown in FIG. It is. FIG. 9 shows the change in conductivity with respect to temperature change based on the concentration (3.4%) equivalent to seawater near Japan at 25 ° C.
The salinity concentration sensor 51 and the liquid temperature correction temperature sensor 52 as the concentration detecting means 5 are attached in the middle of the outlet circulation pipe portion 42 associated with the circulation pipe 4 on the outlet side of the circulation pump CP as shown in FIG. More preferred. In addition to the mixing and stirring effect by the circulation pipe 4, the salt concentration after the stirring by the impeller of the circulation pump CP is measured, and the homogenization of the mixed solution ML further proceeds, and the measurement accuracy of the salt concentration increases. is there.

  In the present embodiment, the salinity concentration sensor 51 converts salts other than NaCl (sodium chloride) contained in the seawater W into the amount of NaCl, and the liquid temperature correction temperature sensor 52 corrects the salinity at 25 ° C. Concentration is displayed on the control panel 63 as the concentration, and concentration control is performed by the salinity concentration control means 6 based on this salinity concentration. In FIG. 1, the salinity concentration sensor 51 and the temperature sensor 52 for correcting the liquid temperature of the mixed liquid ML are separated from each other. However, the concentration detecting means 5 of the present invention includes the temperature sensor for correcting the liquid temperature in the salinity concentration sensor 51. 52 may be built-in, and the density detecting means 5 here also does so.

The salinity concentration control means 6 controls the flow rate of the water flow rate adjustment valve 33 and the flow rate of the salt water flow rate adjustment valve 23 based on the temperature correction concentration of the salinity by the concentration detection means 5, and the mixed liquid ML in the adjustment tank 1. It is a control means to adjust the salinity concentration. In response to a valve adjustment command from the controller 60 that has received the detection signal from the concentration detecting means 5, the degree of opening and closing of the salt water flow rate adjusting valve 23 and the water flow rate adjusting valve 33 is controlled to adjust the salt concentration of the mixed liquid ML in the tank 10. To do. In FIG. 1, dotted lines indicate instrumentation wiring.
In the course of injecting seawater W and water W into the adjustment tank 1 and accumulating the mixed liquid ML, the salinity concentration control means 6 is used, for example, the temperature correction concentration of salinity by the concentration detection means 5 exceeds the set value. If so, the opening degree of the water flow rate adjustment valve 33 is increased and the opening degree of the salt water flow rate adjustment valve 23 is reduced. On the other hand, when the temperature correction concentration of the salinity of the concentration detection means 5 is below the set value, the opening of the water flow rate adjustment valve 33 is decreased and the opening of the salt water flow rate adjustment valve 23 is increased. Thus, as the mixed solution ML of the salt water SW and the water W injected while adjusting the concentration accumulates in the tank 10, it approaches the set salt concentration and eventually reaches. Finally, the set concentration specified by the touch panel 61 is secured between 0 and the seawater concentration of 3.4%, and the mixed solution ML becomes the adjusted solution AL (adjusted low salt water) after the adjustment of the salt concentration, It collects in the adjustment tank 1.

The supply tank 7 is used as a tank for receiving the adjusted liquid AL after the adjustment of the salinity concentration in the adjustment tank 1, and is sent as the adjusted liquid AL to the equipment that requires the adjusted high-concentration salinity liquid. It is a feed tank that uses liquid. The supply tank 7 has a capacity capable of accumulating in the tank the amount consumed by the equipment requiring the adjusted liquid AL in a predetermined time, and the adjusted liquid of the amount consumed in the adjustment tank 1 within the predetermined time. The capacity of the supply tank 7, the capacity of the adjustment tank 1, the capacity of the circulation pump CP, the salinity concentration control means 6 and the like are selected so that the AL can be replenished to the supply tank 7. This allows continuous operation of equipment requiring adjusted liquid AL.
In this embodiment, the capacity of the supply tank 7 and the capacity of the adjustment tank 1 are made the same, and the amount of the adjusted liquid AL that is fed from the supply tank 7 to the ice making equipment that requires the adjusted liquid AL in a predetermined time is adjusted. The tank 1 can be built with a margin within the predetermined time. The supply tank 7 and the adjustment tank 1 are made into a cylindrical tank, and both capacities are made the same, so that the cost of the apparatus is reduced.

The feed pipe 8 is a pipe connecting the supply tank 7 and the adjustment tank 1. One end of the feed pipe 8 is connected to the lower part of the adjustment tank 1, and the other end is disposed near the bottom in the supply tank 7. The liquid feed pump SP is a pump provided in the middle of the feed pipe 8. The adjusted liquid AL extracted from the lower part of the adjustment tank 1 is sent to the supply tank 7 with a pump pressure.
In the present embodiment, the incoming circulation pipe 41 and the circulation pump CP related to the circulation pipe 4 from the lower part of the adjustment tank 1 to the circulation pump CP, and the incoming feed pipe related to the feed pipe 8 from the adjustment tank 1 to the liquid feed pump SP. The unit 81 and the liquid feed pump SP are shared. Then, the three-way valve 9 is provided in the middle of the outlet / circulation pipe portion 42 related to the circulation pipe 4 arranged so as to return the mixed liquid ML from the circulation pump CP back into the adjustment tank 1, and from the three-way valve 9 to the supply tank 7. The feed pipe section 82 relating to the feed pipe 8 is provided so that the adjusted liquid AL in the adjustment tank 1 is fed into the supply tank 7 by the switching operation of the three-way valve 9. This is to reduce the cost of the apparatus. In this case, the outlet circulation piping section 42 from the circulation pump CP to the three-way valve 9 is also shared depending on the attachment location of the three-way valve 9, thereby forming the common pipes 45 and 85.
In FIG. 1, reference numeral LS <b> 1 indicates a liquid level sensor in the adjustment tank 1, and reference numeral LS <b> 7 indicates a liquid level sensor in the supply tank 7.

FIG. 5 shows a control flowchart of the control circuit according to the salinity concentration control means 6. A concentration control procedure for adjusting the salt concentration of the mixed solution ML of the salt water SW and the water W injected into the adjustment tank 1 and accumulating in the tank 10 as the adjusted liquid AL is shown. When the circulation pump CP is in an off state and the three-way valve 9 is in a circulation operation state in which the mixed solution ML is allowed to flow into the circulation pipe 4, the concentration is set by the touch panel 61 and the shutoff valves 22 and 32 are opened.
When the operation is started, the salt water flow rate adjustment valve 23 and the water flow rate adjustment valve 33 are opened, and the salt water SW and the water W are poured into the adjustment tank 1 through the salt water pipe 21 and the water pipe 31. In step 101, the detection signal of the liquid level sensor LS1 for the liquid mixture in the adjustment tank 1 is read, and when the liquid level of the liquid mixture ML in the tank 10 is lower than the lowest point LL, the salt water flow rate adjustment valve 23, water The flow rate adjustment valve 33 is kept open. On the other hand, if the flow rate is higher than the lowest point LL, the salt water flow rate adjustment valve 23 and the water flow rate adjustment valve 33 are kept open, and the circulation pump CP is turned on (step 102). ). The mixed liquid ML in the adjustment tank 1 sucked from the extraction port 410 is circulated by the circulation pump CP, and passes through the inlet / circulation pipe section 41, the common pipe 45, the concentration detection means 5, and the outlet / circulation pipe section 45 to enter the tank 10 Return to. Thereafter, it is determined whether or not a specified water level specified in advance, for example, the lower point L has been exceeded (step 103). If exceeded, the detection signal of the concentration detecting means 5 is read, and when the detected concentration exceeds the set value in the following step 104 Restricts the salt water flow rate adjustment valve 23 and keeps the water flow rate adjustment valve 33 open (step 105). In the detection signal reading of the concentration detection means 5, a signal obtained by subjecting the salinity concentration detection signal from the salinity concentration sensor 51 to temperature correction by the liquid temperature correction temperature sensor 52 is read. On the other hand, when the detected concentration is lower than the set value, the salt water flow rate adjustment valve 23 is left open and the water flow rate adjustment valve 33 is throttled (step 106). Thus, by adjusting the opening of the salt water flow rate adjustment valve 23 and the water flow rate adjustment valve 33 with the set concentration as a boundary, the salt concentration of the mixed liquid ML accumulated in the adjustment tank 1 approaches the set value and eventually reaches. . In subsequent step 107, when the liquid level of the mixed liquid ML in the tank 10 does not reach the required water level H, the salt water SW and water W are supplied while adjusting the opening of the salt water flow rate adjusting valve 23 and the water flow rate adjusting valve 33. It is poured into the tank 10 and the adjustment of the salt concentration of the mixed solution ML is continued to maintain the set value. When the required water level H is reached, the salt water flow rate adjustment valve 23 and the water flow rate adjustment valve 33 are closed (step 108). Thereafter, in step 109, the circulation pump CP is turned off, and the salt concentration mixed liquid ML set in the adjustment tank 1 at the start, that is, the adjusted liquid AL that has been adjusted for the salt concentration, ensures the necessary amount of the required water level H. To be stored.

After that, although illustration of the control flowchart is omitted, it is confirmed that the adjusted liquid AL has a set concentration, and the three-way valve 9 is switched. The adjusted liquid AL accumulated in the adjustment tank 1 passes through the common pipe 85 which is also a part of the outlet circulation pipe part 42 from the inlet / outlet pipe part 81, passes through the three-way valve 9, and the outlet pipe 82. Connect with. The liquid feed pump SP shared with the circulation pump CP is moved to transfer the adjusted liquid AL in the adjustment tank 1 to the supply tank 7. The detection signal of the adjusted liquid level sensor LS7 in the supply tank 7 is read. When the detection signal is lower than the upper point H of the liquid level sensor LS7, the liquid feed pump SP is kept on and the upper point H is reached. The liquid feed pump SP is turned off. In this way, the supply tank 7 is filled with a necessary amount capable of stably supplying the adjusted liquid AL having a highly accurate set concentration with no concentration fluctuation during liquid feeding to the necessary equipment. Including the switching of the three-way valve 9, the adjusted liquid AL is automatically transferred from the adjusting tank 1 to the supply tank 7. Thereafter, the three-way valve 9 is automatically switched, and the operation from Step 101 is repeated. Although the shut-off valves 22 and 32 are manually operated in FIG. 1, the actual apparatus is automated by using a solenoid valve so that the shut-off valves 22 and 32 are opened by a start button.
In the figure, reference numeral 17 is an adjustment tank inspection port, reference numeral 18 is an upper wall of the adjustment tank 1, reference numeral 62 is a switch button, reference numeral 77 is a supply tank inspection port, reference numeral 78 is an upper wall of the supply tank 7, and reference numeral ALP is The feed pipe for sending this adjusted liquid AL from the supply tank 7 to the installation which needs the adjusted liquid AL is shown.

FIG. 6 shows a salt concentration-adjusted liquid supply apparatus according to another embodiment in place of FIGS. In this adjusted liquid supply apparatus, the three-way valve 9 is omitted, and the circulation pipe 4 and the feed pipe 8 are independent from each other. A circulation pump CP and a liquid feed pump SP are provided separately. Although the cost of the apparatus is increased because the common use of the circulation pump CP and the liquid feed pump SP of the first embodiment and the common use of the incoming circulation pipe 4 and the incoming feed pipe 81 are eliminated, the salinity with high accuracy is the same as in the first embodiment. It is a liquid supply device with a adjusted salt concentration that can supply the concentration continuously and stably.
FIG. 7 shows another embodiment of the salt concentration-adjusted liquid supply apparatus, which is an alternative to FIGS. Although the adjustment tank 1 and the supply tank 7 of Embodiment 1 were separate structures, FIG. 7 provides the partition tank TK1 in one tank TK, and divides the tank into two to make the adjustment tank 1 and the supply tank 7. . This device can be further reduced in cost and size.
6 and 7, the other configuration is the same as that of the salt concentration-adjusted liquid supply apparatus in FIGS. 1 to 5, and the description thereof is omitted. The same reference numerals as those shown in FIGS. 1 to 5 denote the same or corresponding parts.

The liquid supply device with adjusted salt concentration configured as described above includes the adjustment tank 1 in which salt water SW and water W are injected and stored in the tank 10 to adjust the salt concentration in the process of storing the mixed liquid ML; And a supply tank 7 for receiving the adjusted liquid AL which has been adjusted in the adjustment tank 1, so that the low salinity water (concentration-adjusted liquid AL) with high accuracy from the supply tank 7. Can be stably supplied to the necessary equipment. During the supply to the facility, there is no disadvantage that the salinity concentration slightly changes due to a slight delay of the control operation seen in Patent Document 1 and the like, and the accuracy of the salt water concentration is distorted. For example, an ice maker that produces fine ice with a lower salinity than seawater W, which is suitable for maintaining freshness, will cause a drop in the quality of the fine ice if the salinity fluctuates during the injection of salt water. If this is the case, this will not happen.
If the concentration is set on the touch panel 61 at the start in accordance with the specifications of the salt concentration required by the fine ice side, the adjusted liquid AL of the salt concentration can be stored in the supply tank 7. Since the concentration of the adjusted liquid AL in the supply tank 7 does not fluctuate during supply, the equipment that has received the adjusted liquid AL can stably produce products such as high-quality fine ice. When freezing seafood and fruits and vegetables, cell membranes are destroyed, but freshness is maintained if transported from the production area to the customer using fine ice that is slightly higher than the freezing temperature (-3 ° C to 0 ° C). The This adjusted liquid supply apparatus demonstrates its power as a salt water supply apparatus for producing such fine ice.
The adjusted liquid AL mixed with water W and seawater (salt water SW) and adjusted to a predetermined salinity concentration by this apparatus is not limited to the ice making machine, for example, a seafood used as the adjusted liquid AL as a liquid, It can also be used for agricultural products. It is effective for the low salt water of packaged products in which low salt water is enclosed together with raw oysters, low salt water used for maintaining the freshness of the collected seaweed raw algae, and the like.

And since this apparatus is provided with the adjustment tank 1 and the supply tank 7, it enables the continuous operation of the use destination equipment of the adjusted liquid AL.
If the supply tank 7 is a device with only the adjustment tank 1, even if the adjusted liquid AL is accumulated, it is supplied to the user equipment when the adjusted liquid AL in the tank 10 runs out. Stop the equipment. In order to avoid this, if the salt water SW and water W are allowed to flow into the tank 10 while the adjusted liquid is being supplied to the user equipment, the concentration fluctuation will occur even if the salinity concentration control means 6 is used. Adjusted liquid AL cannot be supplied. The salt concentration changes with the inflow of the salt water SW and the water W, and even if the operation amount to be canceled is corrected by the change measurement by the salt concentration control means 6, the mixed solution ML that is out of the set value is used as it is. This causes a problem of being sent to the facility. The process control by the salinity concentration control means 6 responds by quickly changing the concentration to a specified set value due to a change in the external environment, but the flow rate during that time flows out of the set value.
On the other hand, this adjusted liquid supply apparatus includes the adjustment tank 1 and the supply tank 7, and while the adjusted liquid AL is being supplied from the supply tank 7 to the use facility, the adjusted liquid 1 is supplied in the adjustment tank 1. AL can be built. During the supply of the adjusted liquid AL from the supply tank 7 to the external equipment, the salt concentration adjustment operation is performed in another adjustment tank 1, and the mixed liquid ML during the adjustment operation is not taken out of the system. The mixed liquid ML in the initial stage injected into the tank 10 is far from the set concentration even when controlled by the salinity concentration control means 6, but converges to the set concentration while the mixed liquid ML is stored in the tank 10. I will let you. Concentration adjustment is performed, and the mixed liquid ML is finally adjusted to the adjusted liquid AL that matches the set concentration, and the adjusted liquid AL is stored in the adjustment tank 1. Thus, before the adjusted liquid AL in the supply tank 7 is exhausted, the adjusted tank 1 is appropriately transported and replenished from the adjustment tank 1 to the supply tank 7, so that the adjusted liquid AL necessary for sending to the external equipment is always present in the supply tank 7. It is filled. The present invention is an innovative adjusted liquid supply device that can continuously supply the adjusted liquid AL, which is a high-precision, low-salt water, to the equipment where the adjusted liquid AL is used without causing fluctuations in concentration and continuously. It has become.

Further, when the concentration detection means 5 includes the temperature sensor 52 for correcting the liquid temperature of the mixed liquid ML in addition to the salt concentration sensor 51 based on the electrical conductivity, the measured value of the salt concentration sensor 51 that causes a measurement error due to the liquid temperature is obtained. It can be corrected to an accurate salinity value. Therefore, the adjusted liquid AL with high accuracy of the salinity concentration can be easily manufactured in the adjustment tank 1. Regardless of the temperature change of seawater, tap water, etc. in summer, winter, etc., salt water (concentration-adjusted liquid AL) always having the correct salinity concentration can be appropriately supplied to the supply tank 7 and the salt water usage destination.
Further, when a salinity concentration sensor 51 and a liquid temperature correcting temperature sensor 52 are inserted in the middle of the outlet circulation pipe portion 42 related to the circulation pipe 4 on the outlet side of the circulation pump CP, mixing is performed by the stirring effect of the circulation pump CP. Since the liquid ML is made uniform, the salt concentration of the adjusted liquid AL is made more accurate at an early stage.

  In addition, the salt water inlet 210 and the water inlet 310 are arranged so as to face each other in the tank 10 near the side peripheral wall 11 of the adjustment tank 1, and the mixture ML is extracted from the lower part of the adjustment tank 1. If the extraction port 410 of the pipe 4 is spaced apart from both of them more than the distance between the salt water injection port 210 and the water injection port 310 and is disposed at an equal distance from both, the salt water SW or water W to the extraction port 410 is provided. Is suppressed, and the mixed liquid ML is made uniform. Contributes to making highly precise adjusted liquid AL in adjustment tank 1.

More specifically, if the incoming circulation piping part 41 and the circulation pump CP, the incoming feeding piping part 81 and the liquid feeding pump SP are shared, the number of piping parts is reduced and only one pump is required. The cost of the spent liquid supply device can be reduced. The three-way valve 9 is provided in the middle of the outlet / circulation pipe section 42, and the outlet / pipe section 82 is provided from the three-way valve 9, and the adjusted liquid AL in the adjustment tank 1 is supplied by the switching operation of the three-way valve 9. 7, the adjusted liquid AL in the adjustment tank 1 can be easily transferred to the supply tank 7 by the switching operation of the three-way valve 9.
As described above, the liquid supply apparatus with adjusted salt concentration exhibits the excellent effects described above and is extremely useful.

  The present invention is not limited to those shown in the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. Adjustment tank 1, salt water supply means 2, water supply means 3, circulation pipe 4, concentration detection means 5, salt concentration control means 6, supply tank 7, feed pipe 8, three-way valve 9, circulation pump CP, liquid feed pump SP, etc. The shape, size, number, material, material, etc. can be appropriately selected according to the application. For example, as water supplied to the adjustment tank 1, well water can be used instead of tap water. The adjustment tank 1 and the supply tank 7 do not need to have the same capacity, and the adjustment tank 1 is supplied with a certain amount of the adjusted liquid AL rather than the time required to send the adjustment liquid AL from the supply tank 7 to the user. If the time required for production is shorter, the capacities may be different.

DESCRIPTION OF SYMBOLS 1 Adjustment tank 10 In the tank 21 Salt water piping 210 Salt water injection port 31 Water piping 310 Water injection port 4 Circulation piping 41 Circulation piping part 410 Outlet port 42 Outflow circulation piping part 5 Concentration detection means 51 Salinity concentration sensor 52 Temperature for liquid temperature correction Sensor 6 Salt concentration control means 7 Supply tank 8 Feed pipe 81 Inlet pipe section 82 Outlet pipe section 9 Three-way valve CP Circulation pump SP Feed pump ML Mixed liquid AL Adjusted liquid

Claims (4)

Salt water (SW) is injected into the tank (10) from the salt water pipe (21) via the salt water flow rate adjustment valve (23), and from the water pipe (31) via the water flow rate adjustment valve (33). Water (W) and a salt concentration adjustment tank (1) for storing a mixed liquid (ML) thereof,
A circulation pipe (4) arranged to return the mixed liquid (ML) extracted from the lower part of the adjustment tank (1) back into the adjustment tank (1);
A circulation pump (CP) provided in the middle of the circulation pipe (4);
Salinity concentration sensor (51) based on electrical conductivity inserted in the circulating pipe (4) or in the mixed liquid (ML) of the adjusting tank (1) and for correcting the liquid temperature of the mixed liquid (ML) Concentration detecting means (5) provided with a temperature sensor (52);
Based on the salinity temperature correction concentration by the concentration detection means (5), the flow rate of the water flow rate adjustment valve (33) and the flow rate of the salt water flow rate adjustment valve (23) are controlled, and the adjustment tank (1) A salt concentration control means (6) for adjusting the salt concentration of the mixed liquid (ML);
Supply tank (7) for receiving the adjusted liquid (AL) that has finished adjusting the salinity in the adjustment tank (1),
A feed pipe (8) connecting the supply tank (7) and the adjusting tank (1);
A liquid supply apparatus with adjusted salt concentration, comprising: a liquid feed pump (SP) provided in the middle of the pipe of the feed pipe (8). The inlet circulation piping part (41) and the circulation pump (CP) related to the circulation pipe (4) from the lower part of the adjustment tank (1) to the circulation pump (CP), and the liquid feed from the adjustment tank (1) The incoming feed pipe section (81) related to the feed pipe (8) up to the pump (SP) and the liquid feed pump (SP) are shared, and the liquid mixture (ML) is supplied from the circulation pump (CP). A three-way valve (9) is provided in the middle of the outlet circulation pipe part (42) related to the circulation pipe (4) arranged so as to return it to the adjustment tank (1), and the three-way valve (9) An outlet pipe section (82) related to the feed pipe (8) up to the supply tank (7) is provided, and the adjusted liquid (AL in the adjustment tank (1) is changed by switching the three-way valve (9). The liquid supply device with adjusted salt concentration according to claim 1, wherein said liquid is fed into said supply tank (7). The salinity concentration sensor (51) and the liquid temperature correcting temperature sensor (52) are inserted in the middle of the outlet circulation pipe portion (42) related to the circulation pipe (4) on the outlet side of the circulation pump (CP). The liquid supply apparatus with adjusted salt concentration according to claim 1 or 2. A salt water inlet (210) through which salt water (SW) is injected into the adjustment tank (1) from the salt water pipe (21) and a water inlet (310) through which water (W) is injected into the adjustment tank (1). Are arranged so as to face each other in the tank (10) near the side peripheral wall (11) of the adjustment tank (1), and the mixed liquid (ML) is further discharged from the lower part of the adjustment tank (1). The extraction port (410) of the circulation pipe (4) to be extracted is disposed at a location that is farther from both than the distance between the salt water injection port (210) and the water injection port (310) and is equidistant from both. The liquid supply apparatus with adjusted salt concentration according to any one of claims 1 to 3.

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