JP7059148B2 - Test equipment and method for oxygen dissolution equipment - Google Patents

Description

The present invention relates to a test device and method for an oxygen dissolving device, and more particularly to a test device and method for measuring an oxygen dissolution efficiency when dissolving oxygen in various liquids using an oxygen dissolving device.

With the expansion of land-based aquaculture of various fish, various oxygen dissolving devices have been manufactured (see, for example, Patent Documents 1 to 4). On the other hand, a method has not been established in which the dissolved oxygen concentration at the inlet of the device is constant or controlled by an arbitrary numerical value, and the amount of change in one oxygen addition by the device is continuously evaluated. As a result, how much the oxygen concentration increased when passing through the oxygen dissolving device only once from an arbitrary dissolved oxygen amount, and the amount of oxygen required at that time and its dissolution efficiency were not compared or evaluated. .. In addition, various dissolved oxygen reducing devices are used as means for reducing dissolved oxygen in water (see, for example, Patent Document 5), and dissolved oxygen can be removed by using a chemical substance such as sodium sulfite. It is done.

Special Fair 6-22418 Gazette Japanese Unexamined Patent Publication No. 2000-140881 Japanese Unexamined Patent Publication No. 2007-23709 Japanese Unexamined Patent Publication No. 2013-31413 Japanese Unexamined Patent Publication No. 2001-46809

In the conventional oxygen dissolving device test, the dissolved oxygen amount on the inlet side and the dissolved oxygen amount on the outlet side of the oxygen dissolving device are measured in fragments, and the oxygen dissolution efficiency is calculated from the fragmentary data. For this reason, it has been difficult to continuously evaluate changes over time of the liquid to be treated.

Therefore, an object of the present invention is to provide a test device and method for an oxygen dissolving device capable of obtaining a quantitative oxygen dissolving efficiency in consideration of the type and properties of the liquid to be treated, changes over time, and the like.

In order to achieve the above object, the test device of the oxygen dissolution device of the present invention is an oxygen dissolution device for measuring the oxygen dissolution efficiency in the oxygen dissolution device that dissolves oxygen in the liquid to be measured to generate an oxygen dissolution solution. In the test device, a dissolved oxygen reducing device arranged on the upstream side of the oxygen dissolving device to reduce the dissolved oxygen dissolved in the liquid to generate a dissolved oxygen reducing liquid, and a dissolved oxygen generated by the dissolved oxygen reducing device. A dissolved oxygen-reducing liquid supply path for supplying the oxygen-reducing liquid to the oxygen-dissolving device, an oxygen-dissolving liquid circulating supply path for circulating and supplying the oxygen-dissolving liquid generated by the oxygen-dissolving device to the dissolved oxygen-reducing device, and the oxygen dissolution. An inlet-side dissolved oxygen concentration meter that measures the dissolved oxygen concentration in the dissolved oxygen-reducing liquid on the inlet side of the device, and an outlet-side dissolved oxygen that measures the dissolved oxygen concentration in the oxygen-dissolved liquid on the outlet side of the oxygen-dissolving device. A densitometer, a processing liquid flow meter for measuring the flow rate of the liquid processed by the oxygen dissolving device, and an oxygen-containing gas flow meter for measuring the flow rate of the oxygen-containing gas used by the oxygen dissolving device are provided, and the inlet is provided. The inlet side dissolved oxygen concentration measured by the side dissolved oxygen concentration meter, the outlet side dissolved oxygen concentration measured by the outlet side dissolved oxygen concentration meter, the treatment liquid flow rate measured by the treatment liquid flow meter, and the oxygen-containing gas flow rate. It is provided with a calculation means for calculating the oxygen dissolution efficiency in the oxygen dissolution device based on the oxygen-containing gas flow rate measured by the meter.

Further, the test device of the oxygen dissolving device of the present invention is provided with an oxygen dissolving solution storage tank for storing the oxygen dissolving solution on the outlet side of the oxygen dissolving device, and the dissolved oxygen reduction is provided on the outlet side of the dissolved oxygen reducing device. An oxygen-dissolving liquid storage tank for storing the liquid is provided, and an oxygen-dissolving liquid supply means for supplying the oxygen-dissolving liquid in the oxygen-dissolving liquid storage tank to the dissolved oxygen reduction device and a dissolved oxygen reduction in the dissolved oxygen-reducing liquid storage tank are provided. It is characterized by comprising a dissolved oxygen reducing liquid supply means for supplying the liquid to the oxygen dissolving device.

Further, the oxygen-containing gas flow rate regulator for adjusting the flow rate of the oxygen-containing gas supplied to the oxygen dissolving device is provided, and the dissolved oxygen reducing device measures the dissolved oxygen concentration in the dissolved oxygen reducing liquid. To reduce the amount to 0 to 15 mg / L, an inlet-side thermometer for measuring the temperature of the dissolved oxygen-reducing liquid is provided on the inlet side of the oxygen-dissolving device, and the dissolved oxygen is based on the measured temperature of the inlet-side thermometer. It is characterized by being provided with a temperature controlling means for heating or cooling the reducing liquid.

The test method of the oxygen dissolution device of the present invention is the above-mentioned oxygen dissolution device in the test method of the oxygen dissolution device for measuring the oxygen dissolution efficiency in the oxygen dissolution device that dissolves oxygen in the liquid to be measured to generate an oxygen dissolution solution. The dissolved oxygen reducing device located on the upstream side of the device reduces the dissolved oxygen in the liquid, the generated dissolved oxygen reducing liquid is supplied to the oxygen dissolving device, and the oxygen dissolving device dissolves oxygen in the liquid to generate it. The dissolved oxygen solution was circulated and supplied to the dissolved oxygen reducing device , and the inlet-side dissolved oxygen concentration and the outlet-side dissolved oxygen concentration measured on the inlet side and the outlet side of the oxygen-dissolving device were processed by the oxygen-dissolving device. It is characterized in that the oxygen dissolution efficiency in the oxygen dissolution device is calculated based on the flow rate of the liquid and the flow rate of the oxygen-containing gas used by the oxygen dissolution device.

Further, in the test method of the oxygen dissolving device of the present invention, an oxygen dissolving liquid storage tank for storing the oxygen dissolving liquid is provided on the outlet side of the oxygen dissolving device, and the dissolved oxygen reduction is performed on the outlet side of the dissolved oxygen reducing device. A dissolved oxygen-reducing liquid storage tank for storing the liquid is provided, and the oxygen-dissolving liquid in the oxygen-dissolving liquid storage tank is supplied to the dissolved oxygen-reducing device , and the dissolved oxygen-reducing liquid in the dissolved oxygen-reducing liquid storage tank is used as the oxygen-dissolving device. It is characterized by supplying to.

Further, it is characterized in that the flow rate of the oxygen-containing gas supplied to the oxygen dissolving device is adjusted, the dissolved oxygen reducing device reduces the dissolved oxygen concentration to 0 to 15 mg / L, and further, the oxygen dissolving device. It is characterized in that the temperature is measured on the inlet side of the above and the dissolved oxygen reducing liquid is heated or cooled based on the measured temperature on the inlet side.

According to the present invention, since the dissolved oxygen in the liquid to be measured is circulated to the oxygen dissolving device in a state of being reduced by the dissolved oxygen reducing device, the oxygen dissolving efficiency corresponding to the usage conditions such as a land farm can be surely achieved. Moreover, it can be continuously obtained. This makes it possible to select the optimum oxygen dissolving device corresponding to the usage conditions. Further, by providing the oxygen-containing gas flow rate regulator, an appropriate oxygen concentration and oxygen amount can be supplied to the oxygen dissolving device, and the amount of oxygen or the like used can be reduced. Furthermore, it becomes possible to cope with temperature changes, and it becomes possible to continuously perform tests according to actual usage conditions.

It is a system diagram which shows one form example of the test apparatus of the oxygen dissolution apparatus of this invention which can carry out the method of this invention.

FIG. 1 shows an example of a test device of the oxygen dissolving device of the present invention in which the method of the present invention can be carried out. The test device of the oxygen dissolution device shown in this embodiment is for measuring the oxygen dissolution efficiency of the oxygen dissolution device that dissolves oxygen in a liquid to generate an oxygen dissolution solution, and is the test device for the oxygen dissolution device. 11, an oxygen dissolution liquid storage tank 12 for storing the oxygen dissolution liquid, a dissolved oxygen reduction device 13 for reducing the dissolved oxygen dissolved in the liquid to generate a dissolved oxygen reduction liquid, and the dissolved oxygen reduction liquid. A route for circulating the liquid is formed by the dissolved oxygen-reducing liquid storage tank 14 that stores the liquid.

Further, in the dissolved liquid circulation supply path 12a between the oxygen dissolved liquid storage tank 12 and the dissolved oxygen reducing device 13, the oxygen dissolved liquid in the oxygen dissolved liquid storage tank 12 is circulated and supplied to the dissolved oxygen reducing device 13. An oxygen dissolution liquid pump 15 as a liquid supply means and a treatment liquid flow meter 16 for measuring the flow rate of the oxygen dissolution liquid to be circulated are provided between the dissolved oxygen reduction liquid storage tank 14 and the oxygen dissolution device 11. In the dissolved oxygen reducing liquid supply path 14a, a dissolved oxygen reducing liquid pump 17 which is a dissolved oxygen reducing liquid supply means for circulating and supplying the dissolved oxygen reducing liquid in the dissolved oxygen reducing liquid storage tank 14 to the oxygen dissolving device 11 is provided. Has been done.

The dissolved oxygen reducing liquid pump 17 supplies a dissolved oxygen reducing liquid according to the processing amount of the liquid to be oxygen-dissolved by the oxygen dissolving device 11, and the supply amount can be adjusted according to the processing capacity of the oxygen dissolving device 11. A pump is used. Further, as the oxygen dissolution liquid pump 15, basically, a pump that can be adjusted to a supply amount commensurate with the supply amount of the dissolved oxygen reduction liquid pump 17 is used. As a result, the liquid volume of the oxygen dissolution liquid storage tank 12 and the dissolved oxygen reduction liquid storage tank 14 can be kept within a certain range to a certain range, and the liquid can be circulated in a stable state.

Any liquid can be used as the liquid circulating in the route. For example, assuming a land farm for fish, it is actually used in seawater, artificial seawater, fresh water, and even in a farm. You can use the existing aquaculture water. The temperature of the liquid is also arbitrary, and usually it may be set to a temperature corresponding to the temperature of the culture water in the farm, but the dissolved oxygen reducing liquid in the dissolved oxygen reducing liquid storage tank 14 on the inlet side of the oxygen dissolving device 11 By providing an inlet side thermometer 18 for measuring the temperature of the above and a temperature controlling means 19 for heating or cooling the dissolved oxygen reducing liquid, it is possible to maintain a constant liquid temperature regardless of the ambient temperature. It is also possible to adjust the liquid temperature according to seasonal changes such as high water temperature in summer and low water temperature in winter.

The oxygen dissolution liquid storage tank 12 on the outlet side of the oxygen dissolution device 11 is provided with an outlet-side dissolved oxygen concentration meter 21 for measuring the amount of dissolved oxygen in the oxygen dissolution liquid in the oxygen dissolution liquid storage tank 12, and the oxygen dissolution device. The dissolved oxygen-reducing liquid storage tank 14 on the inlet side of 11 is provided with an inlet-side dissolved oxygen concentration meter 22 for measuring the amount of dissolved oxygen in the dissolved oxygen-reducing liquid in the dissolved oxygen-reducing liquid storage tank 14.

As the dissolved oxygen reducing device 13, a generally available dissolved oxygen reducing device can be used, and in principle, as described in, for example, Japanese Patent No. 4323631, in an oxygen solution. A gas that does not contain oxygen, for example, an inert gas such as nitrogen gas or argon gas, usually a nitrogen gas, is used to remove or reduce the dissolved oxygen, and the introduction of the nitrogen gas into the oxygen solution. By controlling the amount and the introduction state, the amount of dissolved oxygen removed or reduced can be adjusted. Further, if only the dissolved oxygen concentration is reduced with respect to the oxygen dissolving solution, air can be introduced to reduce the dissolved oxygen.

Therefore, by controlling the flow rate controller 23 provided in the dissolved oxygen reducing device 13 according to the dissolved oxygen concentration measured by the inlet side dissolved oxygen concentration meter 22, the dissolved oxygen reduction amount in the dissolved oxygen reducing device 13 can be determined. That is, the dissolved oxygen concentration of the dissolved oxygen reducing liquid stored in the dissolved oxygen reducing liquid storage tank 14 can be arbitrarily adjusted. This makes it possible to set the dissolved oxygen concentration of the aquaculture water in the actual farm to 0 to 15 mg / L depending on, for example, the oxygen consumption of the aquaculture fish. It is possible to increase the dissolved oxygen concentration and lower the dissolved oxygen concentration of the dissolved oxygen reducing solution when assuming adult fish.

The oxygen dissolving device 11 is a test target of the test device of the present invention, and various commercially available oxygen dissolving devices are subject to the test. The oxygen dissolving device 11 has an oxygen supply path 24 for supplying an oxygen-containing gas corresponding to the oxygen dissolving device 11, for example, an oxygen-containing gas having various oxygen concentrations such as high-purity oxygen, low-purity oxygen, and air. In addition to being provided, an oxygen-containing gas flow rate regulator 25 for adjusting the flow rate of the oxygen-containing gas supplied from the oxygen supply path 24 to the oxygen dissolving device 11 and an oxygen-containing gas flow meter 26 are provided and dissolved. The flow rate of the oxygen-containing gas can be arbitrarily adjusted according to the dissolved oxygen concentration of the oxygen reducing solution and the dissolved oxygen concentration of the oxygen dissolving solution.

When conducting the test of the oxygen dissolving device 11, conditions such as the dissolved oxygen concentration of the dissolved oxygen reducing liquid, the circulating liquid amount, the liquid temperature, and the dissolved oxygen concentration of the target oxygen dissolving liquid are set, and the oxygen dissolving device 11 Various data necessary for calculation and evaluation by a calculation means (not shown), for example, the oxygen dissolution device 11, while operating the dissolved oxygen reduction device 13, the oxygen dissolution liquid pump 15, and the dissolved oxygen reduction liquid pump 17, respectively. Data such as the dissolved oxygen concentration of the dissolved oxygen reducing liquid on the inlet side, the dissolved oxygen concentration of the oxygen dissolved liquid on the outlet side, the amount of liquid processed by the oxygen dissolving device 11 per hour, the amount of oxygen-containing gas per hour, and the oxygen concentration. Start collection.

Then, with the collected data stable, at least the oxygen dissolution device inlet side dissolved oxygen concentration measured by the inlet side dissolved oxygen concentration meter 22 and the oxygen dissolution device outlet side measured by the outlet side dissolved oxygen concentration meter 21. The oxygen dissolution efficiency in the oxygen dissolving apparatus is calculated based on the dissolved oxygen concentration, the processing liquid flow rate measured by the processing liquid flow meter 16, and the oxygen-containing gas flow rate measured by the oxygen-containing gas flow meter 26.

Further, after completing the test of one oxygen dissolving device 11, another oxygen dissolving device is installed and the test is repeated under the same conditions as appropriate to determine the superiority or inferiority of each oxygen dissolving device under the test conditions. can do. In particular, since the dissolved oxygen is reduced or removed to a certain amount while circulating the liquid and then supplied to the oxygen dissolving device 11, it is possible to quantitatively compare and evaluate each oxygen dissolving device under the same conditions.

Further, in one oxygen dissolving device 11, for example, it is suitable for a large flow rate by changing various conditions such as changing the flow rate of the treatment liquid, changing the amount of oxygen to be supplied and the oxygen concentration, and changing the liquid temperature. It is possible to select a device that meets the usage conditions, such as a device that is suitable for high temperature and a device that is suitable for high temperature, and it is possible to select the optimum oxygen dissolving device 11 according to the conditions for cultivating fish. As a result, it is possible to reduce the running cost when culturing fish on land.

The volumes of the storage tanks 12 and 14 are arbitrary, and can be set to an appropriate volume according to conditions such as the amount of liquid to be circulated, and the volumes of the storage tanks 12 and 14 may be different. It can also be omitted.

11 ... Oxygen dissolving device, 12 ... Oxygen dissolving solution storage tank, 12a ... Dissolved liquid circulation supply path, 13 ... Dissolved oxygen reducing device, 14 ... Dissolved oxygen reducing liquid storage tank, 14a ... Dissolved oxygen reducing liquid supply path, 15 ... Oxygen dissolving solution Pump, 16 ... Dissolved oxygen reduction liquid pump, 17 ... Dissolved oxygen reduction liquid pump, 18 ... Inlet side thermometer, 19 ... Temperature control means, 21 ... Oxygen dissolution liquid oxygen concentration meter, 22 ... Dissolved oxygen reduction liquid oxygen concentration meter, 23 ... Flow controller, 24 ... Oxygen supply path, 25 ... Oxygen-containing gas flow controller, 26 ... Oxygen-containing gas flow meter

Claims (10)

In the test device of the oxygen dissolution device for measuring the oxygen dissolution efficiency in the oxygen dissolution device that dissolves oxygen in the liquid to be measured to generate the oxygen dissolution solution, the test device is arranged on the upstream side of the oxygen dissolution device and is contained in the liquid. A dissolved oxygen reducing device that reduces dissolved oxygen to generate a dissolved oxygen reducing liquid, and a dissolved oxygen reducing liquid supply path that supplies the dissolved oxygen reducing liquid generated by the dissolved oxygen reducing device to the oxygen dissolving device. Measure the dissolved oxygen concentration in the dissolved oxygen reducing liquid at the oxygen dissolving liquid circulation supply path for circulating and supplying the oxygen dissolving liquid generated by the oxygen dissolving device to the dissolved oxygen reducing device and the inlet side of the oxygen dissolving device. A process for measuring the flow rate of the liquid processed by the inlet-side dissolved oxygen concentration meter, the outlet-side dissolved oxygen concentration meter that measures the dissolved oxygen concentration in the oxygen-dissolving solution on the outlet side of the oxygen-dissolving device, and the oxygen-dissolving device. It is equipped with a liquid flow meter and an oxygen-containing gas flow meter that measures the flow rate of the oxygen-containing gas used by the oxygen dissolving device, as well as the inlet-side dissolved oxygen concentration measured by the inlet-side dissolved oxygen concentration meter and the outlet-side. Oxygen in the oxygen dissolving device based on the dissolved oxygen concentration on the outlet side measured by the dissolved oxygen concentration meter, the processing liquid flow rate measured by the processing liquid flow meter, and the oxygen-containing gas flow rate measured by the oxygen-containing gas flow meter. A test device for an oxygen dissolution device, which comprises a calculation means for calculating a dissolution efficiency. An oxygen dissolution liquid storage tank for storing the oxygen dissolution liquid is provided on the outlet side of the oxygen dissolution device, and a dissolved oxygen reduction liquid storage tank for storing the dissolved oxygen reduction liquid is provided on the outlet side of the dissolved oxygen reduction device. An oxygen dissolution liquid supply means for supplying the oxygen dissolution liquid in the oxygen dissolution liquid storage tank to the dissolved oxygen reduction device, and a dissolved oxygen reduction liquid for supplying the dissolved oxygen reduction liquid in the dissolved oxygen reduction liquid storage tank to the oxygen dissolution device. The test apparatus for an oxygen dissolving apparatus according to claim 1, further comprising a supply means. The test device for an oxygen-containing gas according to claim 1 or 2, further comprising an oxygen-containing gas flow rate regulator that regulates the flow rate of the oxygen-containing gas supplied to the oxygen-dissolving device. The test device for the oxygen dissolving device according to any one of claims 1 to 3, wherein the dissolved oxygen reducing device reduces the dissolved oxygen concentration in the dissolved oxygen reducing liquid to 0 to 15 mg / L. An inlet-side thermometer for measuring the temperature of the dissolved oxygen-reducing liquid is provided on the inlet side of the oxygen-dissolving device, and temperature control for heating or cooling the dissolved oxygen-reducing liquid based on the measured temperature of the inlet-side thermometer. The test apparatus for an oxygen dissolving apparatus according to any one of claims 1 to 4, further comprising means. In the test method of the oxygen dissolution device for measuring the oxygen dissolution efficiency in the oxygen dissolution device that dissolves oxygen in the liquid to be measured to generate the oxygen dissolution solution, the dissolved oxygen reduction device arranged on the upstream side of the oxygen dissolution device. Reduces the dissolved oxygen in the liquid, supplies the generated dissolved oxygen reducing liquid to the oxygen dissolving device, dissolves oxygen in the liquid by the oxygen dissolving device, and uses the generated oxygen dissolving liquid to the dissolved oxygen reducing device . Along with circulating supply, the inlet-side dissolved oxygen concentration and the outlet-side dissolved oxygen concentration measured on the inlet side and the outlet side of the oxygen-dissolving device, the flow rate of the liquid processed by the oxygen-dissolving device, and the oxygen-dissolving device are used. A test method for an oxygen-dissolving device, which comprises calculating the oxygen-dissolving efficiency in the oxygen-dissolving device based on the flow rate of the oxygen-containing gas. An oxygen dissolution liquid storage tank for storing the oxygen dissolution liquid is provided on the outlet side of the oxygen dissolution device, and a dissolved oxygen reduction liquid storage tank for storing the dissolved oxygen reduction liquid is provided on the outlet side of the dissolved oxygen reduction device. The sixth aspect of claim 6, wherein the oxygen dissolution liquid in the oxygen dissolution liquid storage tank is supplied to the dissolved oxygen reduction device , and the dissolved oxygen reduction liquid in the dissolved oxygen reduction liquid storage tank is supplied to the oxygen dissolution device. Test method for oxygen dissolution device. The test method for an oxygen-dissolving device according to claim 6 or 7, wherein the flow rate of the oxygen-containing gas supplied to the oxygen-dissolving device is adjusted. The test method for an oxygen dissolving device according to any one of claims 6 to 8, wherein the dissolved oxygen reducing device reduces the dissolved oxygen concentration to 0 to 15 mg / L. The invention according to any one of claims 6 to 9, wherein the temperature is measured on the inlet side of the oxygen dissolving device, and the dissolved oxygen reducing liquid is heated or cooled based on the measured temperature on the inlet side. Test method for oxygen dissolving device.

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